Current detection circuit and current detection method

文档序号：934434 发布日期：2021-03-05 浏览：14次中文

阅读说明：本技术 一种电流检测电路及电流检测方法 (Current detection circuit and current detection method ) 是由邱庆霖庄佳卿于 2019-08-27 设计创作，主要内容包括：一种电流检测电路及电流检测方法,所述电流检测电路包括：检测模块、信号处理模块、第一控制模块、驱动模块及第二控制模块；检测模块在第一档位下检测待检测设备的运行电流并生成第一电流信号；信号处理模块对第一电流信号进行去噪处理和信号放大处理后得到第二电流信号；第一控制模块接收并判断第二电流信号的幅值是否处于电流检测电路的检测量程,若第二电流信号的幅值不处于电流检测电路的检测量程,则第一控制模块输出档位切换信号；驱动单元根据档位切换信号生成档位驱动信号输出至第二控制模块,第二控制模块根据档位驱动信号切换检测模块的档位,以使检测模块在切换后的档位下重新检测待检测设备的运行电流；电流检测电路的兼容性较强。(A current detection circuit and a current detection method, the current detection circuit includes: the device comprises a detection module, a signal processing module, a first control module, a driving module and a second control module; the detection module detects the operating current of the equipment to be detected at a first gear and generates a first current signal; the signal processing module is used for carrying out denoising processing and signal amplification processing on the first current signal to obtain a second current signal; the first control module receives and judges whether the amplitude of the second current signal is in the detection range of the current detection circuit, and if the amplitude of the second current signal is not in the detection range of the current detection circuit, the first control module outputs a gear switching signal; the driving unit generates a gear driving signal according to the gear switching signal and outputs the gear driving signal to the second control module, and the second control module switches the gear of the detection module according to the gear driving signal so that the detection module can detect the running current of the equipment to be detected again under the switched gear; the current detection circuit has strong compatibility.)

1. A current sense circuit that is to receive a sensing device, the current sense circuit comprising:

the device comprises a detection module, a signal processing module, a first control module, a driving module and a second control module;

the detection module is connected with the signal processing module, the signal processing module is connected with the first control module, the first control module is connected with the driving module, the driving module is connected with the second control module, and the second control module is connected with the detection module and the signal processing module;

the detection module detects the operating current of the equipment to be detected at a first gear and generates a first current signal; the signal processing module is used for carrying out denoising processing and signal amplification processing on the first current signal to obtain a second current signal; the first control module receives and judges whether the amplitude of the second current signal is in the detection range of the current detection circuit, and if the amplitude of the second current signal is in the detection range of the current detection circuit, the first control module judges that the second current signal is a required optimized signal and outputs the optimized signal; if the amplitude of the second current signal is not in the detection range of the current detection circuit, the first control module outputs a gear switching signal;

the driving unit generates gear driving signals according to the gear switching signals and outputs the gear driving signals to the second control module, and the second control module switches the gears of the detection module according to the gear driving signals, so that the detection module detects the running current of the equipment to be detected again under the switched gears.

2. The current sensing circuit of claim 1, wherein the first control module is further configured to determine a type of the second current signal if the amplitude of the second current signal is within a sensing range of the current sensing circuit;

if the second current signal is an analog signal, the first control module outputs an analog control signal, the driving module generates an analog driving signal according to the analog control signal and outputs the analog driving signal to the second control module, the second control module switches an output mode of the signal processing module according to the analog driving signal so that the signal processing module is in an analog output mode, the signal processing module outputs the second current signal to the first control module in the analog output mode, and the first control module outputs the second current signal;

if the second current signal is a digital signal, the first control module outputs a digital control signal, the driving module generates a digital driving signal according to the digital signal and outputs the digital driving signal to the second control module, the second control module switches an output mode of the signal processing module according to the digital driving signal so that the signal processing module is in a digital output mode, the signal processing module outputs the second current signal to the first control module in the digital output mode, and the first control module outputs the second current signal.

3. The current sensing circuit of claim 2, further comprising a reference source module;

the reference source module is connected with the second control module and is used for generating a reference voltage;

if the second current signal is a digital signal, the second control module outputs the reference voltage to the signal processing module, and the signal processing module outputs the second current signal according to the reference voltage.

4. The current detection circuit according to claim 3, wherein the signal processing module comprises a signal feedback unit and a signal amplification unit;

the signal feedback unit is connected with the detection module, and the signal amplification unit is connected with the signal feedback unit, the second control module and the first control module;

the signal feedback unit is used for denoising the first current signal;

the signal amplification unit is used for carrying out signal amplification processing on the first current signal after the denoising processing to obtain the second current signal.

5. The current detection circuit according to claim 4, wherein if the second current signal is an analog signal, the second control module switches the signal feedback unit to the first input terminal of the signal amplification unit according to the analog driving signal, and the signal amplification unit performs proportional amplification on the denoised first current signal to obtain the second current signal;

if the second current signal is a digital signal, the second control module switches the signal feedback unit to the first input end of the signal amplification unit according to the digital driving signal, the second control module switches the reference voltage to the second input end of the signal amplification unit according to the digital driving signal, and the signal amplification unit performs proportional amplification on the denoised first current signal according to the reference voltage to obtain the second current signal.

6. The current detection circuit according to claim 1, wherein the current detection circuit further comprises a signal input module and a signal display module;

the signal input module is connected with the first control module, and the signal display module is connected with the first control module;

the signal input module is used for generating a measuring range reference signal;

the first control module judges whether the amplitude of the second current signal is in the detection range of the current detection circuit according to the amplitude difference between the second current signal and the range reference signal;

the signal display module is used for displaying the range judgment result of the amplitude of the second current signal.

7. The current detection circuit of claim 1, further comprising a signal output module, wherein the signal output module is connected to the first control module, and the signal output module is configured to output and display the second current signal.

8. The current sensing circuit of claim 1, wherein the second control module is further configured to:

after the gear driving signal is received, controlling the detection module to be disconnected with the equipment to be detected;

and after the gear of the detection module is switched according to the gear driving signal, controlling the detection module to maintain a connection state with the equipment to be detected.

9. A current sensing method, comprising:

detecting the operating current of the equipment to be detected at a first gear and generating a first current signal;

a second current signal which is obtained by carrying out denoising processing and signal amplification processing on the first current signal;

receiving and judging whether the amplitude of the second current signal is in a detection range or not;

if the amplitude of the second current signal is in the detection range, the second current signal is judged to be a required optimized signal and output;

and if the amplitude of the second current signal is not in the detection range, switching the gear, and detecting the operating current of the equipment to be detected under the switched gear.

10. The method of claim 9, wherein if the amplitude of the second current signal is at the detection range, the method further comprises:

judging the type of the second current signal, and switching the output mode of the second current signal according to the judgment result;

if the second current signal is an analog signal, switching an output mode of the second current signal to an analog output mode so as to output the second current signal in the analog output mode;

if the second current signal is a digital signal, switching an output mode of the second current signal to a digital output mode to output the second current signal in the digital output mode.

Technical Field

The invention belongs to the technical field of circuit detection, and particularly relates to a current detection circuit and a current detection method.

Background

In the design process of the electronic circuit, the current detection process plays an extremely important role in the accurate control of the electronic circuit; the circuit control performance of the electronic circuit and the safety of electronic components can be obtained by accurately detecting the current in the electronic circuit in real time; a technician can master the running state of the electronic circuit in real time according to the current detection result so that the electronic circuit can be suitable for different circuit systems, and the electronic circuit is connected with stable electric energy to be in a rated running environment; therefore, current detection is a key link in the operation process of the electronic circuit, and technicians also adopt different current detection methods to obtain the current of the electronic circuit, so that the working stability and reliability of the electronic circuit are improved.

However, because the types of electronic components are numerous, the power performance and the rated power state of each type of electronic component can be greatly different, and the working current conditions of different types of electronic components can have great differences, in the conventional technology, a portable multimeter or an electric quantity meter and other devices are usually adopted to obtain the current of the electronic component, and in the process of detecting the current of the electronic component, the conventional current detection method has at least the following three problems:

1. although the universal meter has a large current detection range for electronic components, the current detection precision is low; when the universal meter detects the current of different electronic components, different measuring ranges need to be manually switched; if the current range of the electronic component is not clear, a sampling fuse in the multimeter is easily burnt when the electronic component is subjected to first current detection, so that the physical damage of the multimeter is caused.

2. The electricity meter can not detect high-precision current of various electronic components, and has poor compatibility; for example, when the power of the electronic component is high, the electricity meter is in a normal current detection state; when the power of the electronic component is small, the electricity meter is in a critical detection state, the current detection process of the electricity meter can fluctuate greatly along with the power change of the electronic component, and the current detection is unstable.

3. The traditional current detection equipment has the advantages of single output detection result, small selectivity, incapability of meeting the current detection precision requirements of electronic components of different types and limited application range.

Therefore, the traditional technology has lower current detection precision for electronic components, lower flexibility and compatibility of current detection, and more complicated current detection process, and brings great inconvenience to the control of an electronic circuit.

Disclosure of Invention

In view of this, embodiments of the present invention provide a current detection circuit and a current detection method, which are intended to solve the problems that the current detection accuracy of different types of electronic components is low, the compatibility is poor, and the current detection state of the electronic components cannot be switched according to the power performance of the different types of electronic components in the conventional technical scheme.

A first aspect of an embodiment of the present invention provides a current detection circuit, which is used for receiving a detection device, and includes:

the device comprises a detection module, a signal processing module, a first control module, a driving module and a second control module;

In one embodiment, if the amplitude of the second current signal is in the detection range of the current detection circuit, the first control module is further configured to determine the type of the second current signal;

In one embodiment thereof, the current detection circuit further comprises a reference source module;

the reference source module is connected with the second control module and is used for generating a reference voltage;

In one embodiment, the signal processing module comprises a signal feedback unit and a signal amplification unit;

the signal feedback unit is connected with the detection module, and the signal amplification unit is connected with the signal feedback unit, the second control module and the first control module;

the signal feedback unit is used for denoising the first current signal;

the signal amplification unit is used for carrying out signal amplification processing on the first current signal after the denoising processing to obtain the second current signal.

In one embodiment, if the second current signal is an analog signal, the second control module switches the signal feedback unit to the first input end of the signal amplification unit according to the analog driving signal, and the signal amplification unit performs proportional amplification on the denoised first current signal to obtain the second current signal;

In one embodiment, the current detection circuit further comprises a signal input module and a signal display module;

the signal input module is connected with the first control module, and the signal display module is connected with the first control module;

the signal input module is used for generating a measuring range reference signal;

the signal display module is used for displaying the range judgment result of the amplitude of the second current signal.

In one embodiment, the current detection circuit further includes a signal output module, the signal output module is connected to the first control module, and the signal output module is configured to output and display the second current signal.

In one embodiment, the second control module is further configured to:

after the gear driving signal is received, controlling the detection module to be disconnected with the equipment to be detected;

and after the gear of the detection module is switched according to the gear driving signal, controlling the detection module to maintain a connection state with the equipment to be detected.

A second aspect of an embodiment of the present invention provides a current detection method, including:

detecting the operating current of the equipment to be detected at a first gear and generating a first current signal;

a second current signal which is obtained by carrying out denoising processing and signal amplification processing on the first current signal;

receiving and judging whether the amplitude of the second current signal is in a detection range or not;

if the amplitude of the second current signal is in the detection range, the second current signal is judged to be a required optimized signal and output;

and if the amplitude of the second current signal is not in the detection range, switching the gear, and detecting the operating current of the equipment to be detected under the switched gear.

In one embodiment, if the amplitude of the second current signal is at the detection range, the current detection method further includes:

judging the type of the second current signal, and switching the output mode of the second current signal according to the judgment result;

if the second current signal is an analog signal, switching an output mode of the second current signal to an analog output mode so as to output the second current signal in the analog output mode;

if the second current signal is a digital signal, switching an output mode of the second current signal to a digital output mode to output the second current signal in the digital output mode.

The current detection circuit can acquire current information of equipment to be detected in real time through the detection module and convert the original current information into corresponding current signals, and the first control module judges whether the current amplitude of the equipment to be detected is matched with the detection range of the current detection circuit or not according to the current signals; if the current amplitude of the equipment to be detected does not accord with the current detection precision requirement, the first control module indirectly changes the control state of the second control module through the gear switching signal so as to change the detected gear, and then the detection module detects the current of the equipment to be detected under the gear matched with the current amplitude of the equipment to be detected, so that the current detection precision of the equipment to be detected is improved, and the current detection process is simple and convenient to operate; therefore, the embodiment of the invention automatically switches the detection range of the device to be detected according to the current amplitude of the device to be detected so as to output a high-precision current detection result; the current detection circuit can be universally applied to the current detection process of various devices to be detected without different types, the compatibility is strong, and the current detection process has high flexibility and self-adaptive performance; this implementation can in time prevent that too high current amplitude from causing the harm or the not high problem of current detection result credibility to current detection circuit under the unknown condition of current amplitude of waiting to detect equipment, and current detection circuit has higher security and stability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a current detection circuit according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a low voltage analog switch according to an embodiment of the present invention;

fig. 3 is another schematic structural diagram of a current detection circuit according to an embodiment of the present invention;

fig. 4 is another schematic structural diagram of a current detection circuit according to an embodiment of the present invention;

fig. 5 is a schematic circuit diagram of a signal amplifying unit according to an embodiment of the present invention;

fig. 6 is a schematic circuit diagram of a detection module according to an embodiment of the present invention;

fig. 7 is another schematic structural diagram of a current detection circuit according to an embodiment of the present invention;

fig. 8 is another schematic structural diagram of a current detection circuit according to an embodiment of the present invention;

FIG. 9 is a flowchart illustrating a method for detecting current according to an embodiment of the present invention;

fig. 10 is a detailed flowchart of step S104 of the current detection method shown in fig. 9.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, a schematic structural diagram of a current detection circuit 10 according to an embodiment of the present invention is shown, wherein the current detection circuit 10 is connected to a device to be detected 20, the current detection circuit 10 is electrically connected to various types of devices to be detected 20 in the field, and the current detection circuit 10 can accurately detect currents of various types of devices to be detected 20, so that the compatibility is strong; for convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:

the current detection circuit 10 includes: the device comprises a detection module 101, a signal processing module 102, a first control module 103, a driving module 104 and a second control module 105.

The detection module 101 is connected with the signal processing module 102, the detection module 101 is further connected with the device to be detected 20, the signal processing module 102 is connected with the first control module 102, the first control module 103 is connected with the driving module 104, and the first control module 103 and the driving module 104 can perform bidirectional signal transmission; the driving module 104 is connected with the second control module 105, and the driving module 104 and the second control module 105 can perform bidirectional signal transmission; the second control module 105 is connected to the detection module 101 and the signal processing module 102, the second control module 105 and the detection module 101 can perform bidirectional signal transmission, and the second control module 105 and the signal processing module 102 can perform bidirectional signal transmission.

The detection module 101 detects the operation current of the equipment to be detected 20 at a first gear and generates a first current signal; the first gear is a preset gear, the current detection circuit 10 acquires current information of the device to be detected 20 under a detection range, so that the current detection efficiency and the current detection safety of the current detection circuit 10 are guaranteed, and the detection module 101 can sensitively detect the current information of the device to be detected 20 in real time; the signal processing module 102 performs denoising processing and signal amplification processing on the first current signal to obtain a second current signal; the signal processing module 102 is used for carrying out denoising processing and amplification processing on the first current signal, so that the transmission precision and transmission efficiency of current information can be improved, and loss and distortion of the current information in the transmission process are avoided; after the signal processing module 102 performs signal format conversion on the first current signal, the second current signal can completely eliminate the interference of external noise, and the second current signal can be directly identified by the first control module 103 and external electronic equipment; the second current signal contains the complete current information of the device 20 to be detected, so that the conversion efficiency of the current information is accelerated by the signal processing module 102, so that the internal circuit modules of the current detection circuit 10 have higher signal transmission performance.

The first control module 103 receives and judges whether the amplitude of the second current signal is in the detection range of the current detection circuit 10, and if the amplitude of the second current signal is in the detection range of the current detection circuit 10, the first control module 103 determines that the second current signal is a required optimized signal and outputs the signal; at this time, if the amplitude of the second current signal is successfully matched with the detection range of the current detection circuit 10, it indicates that the amplitude of the second current signal can accurately reflect the actual current amplitude of the device to be detected 20; the current detection circuit 10 can meet the current detection precision requirement for the current detection result of the device to be detected 20, at the moment, the second current signal output by the first control module 103 is directly used as the current detection result of the current detection circuit 10, the current detection circuit 10 outputs the current detection result in a safe working mode, and the running current amplitude of the device to be detected 20 can be obtained in real time according to the second current signal, so that the current precision detection requirement in a circuit system of a technician can be met.

If the amplitude of the second current signal is not in the detection range of the current detection circuit 10, the first control module 103 outputs a gear switching signal; for example, if the current detection range of the current detection circuit 10 is 0 to 100A, and the amplitude of the second current signal is 105A, it indicates that the amplitude of the second current signal is not in the detection range of the current detection circuit 10; in this embodiment, the actual operating current amplitude of the device to be detected 20 can be accurately obtained through the second current signal, the first control module 103 can determine the matching condition between the current amplitude of the device to be detected 20 and the detection range, when the amplitude of the second current signal is not in the detection range of the current detection circuit 10, it indicates that the accuracy of the second current signal obtained by the current detection circuit 10 in the current detection range cannot meet the current detection accuracy requirement, the amplitude of the operating current of the device to be detected 20 is not matched with the first gear of the detection module 101, the current detection circuit 10 has poor current detection performance for the device to be detected 20 in the current detection range, and the current detection circuit 10 is in an extremely unsafe operating state.

The driving unit 104 generates a gear driving signal according to the gear switching signal and outputs the gear driving signal to the second control module 105, the gear switching signal includes gear switching control information, and the driving unit 104 outputs corresponding driving information according to the gear switching signal so as to change a current detection process; the second control module 105 switches the gear of the detection module 101 according to the gear driving signal, so that the detection module 101 detects the running current of the device to be detected 20 again at the switched gear; the second control module 105 has circuit control performance, when the gear of the detection module 101 changes, the detection range of the current detection circuit 10 also changes in a self-adaptive manner, and the current detection process of the current detection circuit 10 has higher self-adaptive adjustment performance; the detection module 101 detects the operating current of the device to be detected 20 again at the switched gear to generate a first current signal; it should be noted that there is a one-to-one correspondence relationship between the detection range of the current detection circuit 10 and the gear of the detection module 101, and after the gear of the detection module 101 is switched, the detection range of the current detection circuit 10 is also changed correspondingly, so that the first current signals obtained by the detection module 101 again in the switched gear have different detection accuracies; as described above, under the switched gear condition, the signal processing module 102 processes the first current signal to obtain a second current signal, and the first control module 103 continues to determine whether the amplitude of the second current signal reaches the predetermined detection precision, and the process is repeated until the first control module 103 can output the high-precision second current signal, so as to implement the real-time and automatic detection function of the current detection circuit 10 on the operating current of the device to be detected 20, thereby improving the compatibility, precision and convenience of the current detection circuit 10.

Optionally, the device 20 to be detected is any type of electronic component in the art, which is not limited herein; illustratively, the device 20 to be tested is a resistor, an inductor, or the like; furthermore, the current detection circuit 10 in this embodiment can accurately detect the current of an electronic component of an unused type, and has a wide application range.

Referring to fig. 1, a structural schematic diagram of a current detection circuit 10 is shown, where the current detection circuit 10 has a relatively simplified module structure, and is compatible for use in current detection processes of different types of devices to be detected; after the current information of the device to be detected is acquired through the detection module 101, the first control module 103 can judge whether the current detection result of the current detection circuit 10 is at the preset current detection precision according to the second current signal, and if the amplitude of the second current signal acquired through the current detection circuit 10 meets the preset current detection precision, the second current signal is output to meet the current detection requirement of a technician; on the contrary, if the amplitude of the second current signal does not meet the preset current detection precision, the detection module 101 is controlled to switch the gear to reacquire the current information of the device to be detected 20, and then whether the reacquired current detection result meets the preset detection precision or not is continuously judged, and the process is repeated until the second current signal output by the current detection circuit 10 can completely meet the current detection precision requirement, so that the reliability of the current detection circuit 10 on the current detection result of the device to be detected 20 is ensured, and the control precision and the control accuracy of the current detection circuit 10 are improved; therefore, the current detection circuit 10 in this embodiment can realize an automatic gear shifting function according to the operating current amplitude of the device to be detected 20, the current detection circuit 10 can always output a second current signal in a detection range matched with the current amplitude of the device to be detected 20, the current detection process of the current detection circuit 10 has higher controllability and flexibility, the current detection precision of the current detection circuit 10 and the reliability of the current detection result are improved, and the current detection circuit 10 can monitor the current subtle change condition of the device to be detected 20 in real time and sensitively; the current detection circuit 10 can further complete the current detection function for various types of equipment 20 to be detected, and physical damage to internal electronic components of the current detection circuit 10 caused by overlarge current amplitude of the equipment 20 to be detected is prevented; therefore, the current detection circuit 10 in the embodiment has higher current detection safety and stability for the equipment 20 to be detected, the current detection process is simple and convenient to operate, and great convenience is brought to the use of technicians; the problems that the detection range of the current detection equipment in the traditional technology cannot be adjusted in a self-adaptive mode according to the current amplitude of the equipment to be detected 20, the compatibility is low, the accuracy of the current detection result of the equipment to be detected 20 is low, the reliability is low, the operation of the current detection process is complex, the user experience is poor, the physical safety of the current detection equipment can be damaged by the large current of the equipment to be detected 20, and the safety of the traditional current detection equipment is low are effectively solved.

As an alternative embodiment, the second control module 105 includes a low-voltage analog switch, for example, fig. 2 shows a structural schematic of the low-voltage analog switch, where the low-voltage analog switch is an analog device, and if the shift driving signal is at a certain frequency, when the control terminal C of the low-voltage analog switch is connected to the shift driving signal, the low-voltage analog switch may be controlled to be turned on or off by the shift driving signal, and the low-voltage analog switch implements unidirectional conduction or bidirectional conduction according to a level state of the shift driving signal; furthermore, in the embodiment, the gear of the detection module 101 is switched in real time through the on-off state of the low-voltage analog switch, and the on-off state of the low-voltage analog switch can be changed in time through the gear driving signal, so that the control response speed and the sensitivity of the second control module 105 are improved; the gear switching function of the detection module 101 is realized through the low-voltage analog switch, the operation is simple and convenient, the current detection circuit 10 has higher gear switching rate, the detection module 101 obtains high-precision current information in the detection range matched with the running current amplitude of the device to be detected 20, the current detection circuit 10 has higher control safety and stability, and the application range is wider.

As an alternative embodiment, if the amplitude of the second current signal is in the detection range of the current detection circuit 10, the first control module 103 is further configured to determine the type of the second current signal.

When the first control module 103 determines that the amplitude of the second current signal meets the preset current detection precision, the gear of the detection module 101 is matched with the running current amplitude of the device to be detected 20, and the current detection circuit 10 does not need to change the detection range of the current detection circuit itself; in this embodiment, the type of the second current signal is further determined by the first control module 103, and then the current detection circuit 10 selects a corresponding output mode according to the type of the second current signal, so that after the signal processing module 102 processes the current information of the device 20 to be detected in the suitable output mode, the first control module 103 outputs a corresponding current detection result, the current output mode of the current detection circuit 10 has higher diversity, the current detection circuit 10 has higher application range and compatibility, the current detection result output by the current detection circuit 10 is applicable to different industrial technology fields, and the current detection result has higher accuracy.

If the second current signal is an analog signal, the first control module 103 outputs an analog control signal, the driving module 104 generates an analog driving signal according to the analog control signal and outputs the analog driving signal to the second control module 105, the second control module 105 switches an output mode of the signal processing module 102 according to the analog driving signal, so that the signal processing module 102 is in an analog output mode, the signal processing module 102 outputs the second current signal to the first control module 103 in the analog output mode, and the first control module 103 outputs the second current signal.

If the second current signal is a digital signal, the first control module 103 outputs a digital control signal, the driving module 104 generates a digital driving signal according to the digital signal and outputs the digital driving signal to the second control module 105, the second control module 105 switches an output mode of the signal processing module 102 according to the digital driving signal, so that the signal processing module 102 is in a digital output mode, the signal processing module 102 outputs the second current signal to the first control module 103 in the digital output mode, and the first control module 103 outputs the second current signal.

In this embodiment, the second current signal is divided into a digital signal and an analog signal, when the second current signal is an analog signal, the first control module 103 may output an analog control signal, the analog control signal includes analog control information, the driving module 104 outputs corresponding analog driving information according to the analog control signal, the control state of the second control module 105 is changed through the analog driving information, the signal processing module 102 may process the current information in an analog output mode to generate a corresponding second current signal, and the current detection circuit 10 may implement the functions of performing safety detection and high-precision output on the operating current of the device 20 to be detected in the analog mode, thereby greatly ensuring the simplicity and compatibility of the circuit detection process of the current detection circuit 10.

When the second current signal is a digital signal, the first control module 103 outputs corresponding digital control information to enable the current detection circuit 10 to be in a digital output mode, and further, the denoising and signal amplification processes of the signal processing module 102 are matched with the digital signal, and the current detection circuit 10 can safely output a current detection result in the digital output mode, so that the safety and reliability of the current detection circuit 10 in the digital output mode are guaranteed, and the safety and compatibility of the current detection process of the current detection circuit 10 are improved.

Therefore, in this embodiment, when the current detection circuit 10 acquires the second current signal at the gear matched with the current amplitude of the device to be detected 20, the operating current amplitude of the device to be detected 20 can be accurately obtained through the amplitude of the second current signal, the first control module 103 can also switch the output mode of the current detection circuit 10 according to the type of the second current signal, and the current detection process of the current detection circuit 10 has higher adjustment sensitivity and accuracy; when the current detection circuit 10 is applicable to various industrial technical fields, the current detection circuit 10 can output a second current signal in a proper output mode, and the current detection circuit 10 has strong compatibility and expandability; in this embodiment, the selection function of the current output mode is realized through the first control module 103, the signal output precision and accuracy of the current detection circuit 10 are improved, and the current detection circuit 10 has higher practical value and application range.

As an alternative implementation, fig. 3 shows another structural schematic diagram of the current detection circuit 10 provided in this embodiment, and compared with the structural schematic diagram of the current detection circuit 10 in fig. 1, the current detection circuit 10 in fig. 3 further includes a reference source module 106; the reference source module 106 is connected with the second control module 105, and the reference source module 106 is used for generating a reference voltage; the reference voltage can provide reference level information for the current detection circuit 10 so as to ensure that the current detection circuit 10 is in a safe and stable working state; specifically, the reference source module 106 and the second control module 105 can realize bidirectional signal transmission, and the internal circuit modules of the current detection circuit 10 have higher signal compatible transmission performance; the signal processing module 102 can output a complete digital signal in a digital output mode through the reference voltage, so that the precision and compatibility of a current detection result output by the current detection circuit 10 are guaranteed, and the current detection circuit 10 has higher safety.

If the second current signal is a digital signal, the second control module 105 outputs the reference voltage to the signal processing module 102, and the signal processing module 102 outputs the second current signal according to the reference voltage.

When the current detection circuit 10 is in the digital output mode, the second control module 105 can perform a function of transmitting reference voltage, reference voltage information is provided for the signal processing module 102 through the reference voltage, so that the signal processing module 102 maintains a stable current output state in the digital output mode, the second current signal output by the signal processing module 102 has higher precision and compatibility, and then a technician can obtain the running current fluctuation information of the equipment to be detected 20 in real time through the second current signal, the current detection circuit 10 has higher safety and reliability, and the problem that the current output process of the current detection circuit 10 is interfered by external noise, so that the accuracy of a current detection result is lower is solved.

As an alternative implementation, fig. 4 shows another structural schematic of the current detection circuit 10 provided in this embodiment, and compared with the structural schematic of the current detection circuit 10 in fig. 3, the signal processing module 102 in fig. 4 includes: the signal feedback unit 102 and the signal amplification unit 1022 are connected, wherein the signal feedback unit 1021 is connected with the detection module 101, and the signal amplification unit 1022 is connected with the signal feedback unit 1021, the second control module 105 and the first control module 103; the signal amplification unit 1022 and the second control module 105 may maintain a signal bidirectional transmission function therebetween.

The signal feedback unit 1021 is used for denoising the first current signal; when the current change information of the device 20 to be detected is detected by the detection module 101, the first current signal contains part of detection noise, and the detection noise will reduce the accuracy of current detection; therefore, in the embodiment, the noise in the first current signal can be eliminated in real time through the signal feedback unit 1021, and the first current signal subjected to the denoising processing retains the complete current information of the device to be detected 20, so that the problem of loss or distortion of the current information of the device to be detected 20 in the transmission process of the current detection circuit 10 is prevented; therefore, the current detection accuracy is improved in the present embodiment by the first current signal output by the signal feedback unit 1021 accurately reflecting the operation current amplitude of the device 20 to be detected.

The signal amplifying unit 1022 is configured to perform signal amplification processing on the denoised first current signal to obtain a second current signal; when the signal feedback unit 1021 outputs the first current signal to the signal amplification unit 1022, so that the first current signal completes amplification of the signal power, the second current signal output by the signal amplification unit 1022 can be completely and directly identified and processed by the first control module 103, on the basis that the second current signal completely retains the operating current information of the device 20 to be detected, the internal signal processing and transmission rate of the current detection circuit 10 is increased, and the current detection function of the current detection circuit 10 has better compatibility and application range.

As an optional implementation manner, if the second current signal is an analog signal, the second control module 105 switches the signal feedback unit 1021 to the first input end of the signal amplification unit 1022 according to the analog driving signal, and the signal amplification unit 1022 performs proportional amplification on the denoised first current signal to obtain the second current signal.

When the first control module 103 determines that the second current signal is an analog signal, the first control module 103 may send analog control information to change the circuit control performance of the second control module 105, the connection form between the signal feedback unit 1021 and the signal amplification unit 1022 may be directly changed through the second control module 105, the first input end of the signal amplification unit 1022 is accessed to the first current signal after denoising, the signal amplification unit 1022 performs proportional amplification processing on the current information in an analog output mode to enable the current detection circuit 10 to output an accurate analog signal, the current detection circuit 10 may be compatible and applicable to different industrial technologies, the signal amplification unit 1022 has higher current conversion accuracy and current output accuracy for the operating current information of the device 20 to be detected, and has higher practical value.

If the second current signal is a digital signal, the second control module 105 switches the signal feedback unit 1021 to the first input end of the signal amplification unit 1022 according to the digital driving signal, the second control module 105 switches the reference voltage into the second input end of the signal amplification unit 1022 according to the digital driving signal, and the signal amplification unit 1022 performs proportional amplification on the denoised first current signal according to the reference voltage to obtain the second current signal.

When the signal amplifying unit 1022 is in the digital output mode, the signal amplifying unit 1022 may output a corresponding digital signal only by combining the first current signal and the reference voltage, the reference voltage provides reference level information for the digital signal conversion process of the signal amplifying unit 1022, the digital signal may accurately reflect the operation current amplitude of the device to be detected 20, the signal amplifying unit 1022 may implement a stable digital conversion function for the first current signal, and the accuracy and precision of the second current signal are ensured; furthermore, the signal amplifying unit 1022 has high current conversion accuracy in the digital output mode, the current detection circuit 10 has high accuracy and safety of current detection for the device 20 to be detected, and the current output mode has diversity and higher compatibility.

Illustratively, the first input terminal of the signal amplifying unit 1022 is a positive input terminal or a negative input terminal of the signal amplifying unit 1022, which is not limited herein; preferably, the first input terminal of the signal amplifying unit 1022 is a positive input terminal of the signal amplifying unit 1022, and the second input terminal of the signal amplifying unit 1022 is a negative input terminal of the signal amplifying unit 1022; furthermore, the present embodiment may enable the input terminal of the signal amplifying unit 1022 to have different connection forms according to the type of the second current signal, so that the signal amplifying unit 1022 can output both the analog signal and the digital signal compatibly, so that the amplitude of the second current signal has higher accuracy, and the current detection compatibility of the current detection circuit 10 is improved.

As an optional implementation manner, the signal amplifying unit 1022 includes a feedback resistor, where the feedback resistor is used to perform proportional amplification on the amplitude of the first current signal, and whether the signal processing module 102 is in the analog output mode or the digital output mode, the feedback resistor can perform precise amplification processing on the first current signal, so that the scaled second current signal includes the real current information of the device 20 to be detected; the signal amplifying unit 1022 has a relatively simplified circuit structure, and is beneficial to accelerating the internal signal conversion and transmission rate of the current detection circuit 10, so that the current detection precision and detection efficiency of the device 20 to be detected are ensured, the current detection circuit 10 can sample and monitor the tiny current change of the device 20 to be detected, the current signal obtained after amplification is more beneficial to judging the working state of the current detection circuit 10, the application range is wider, and the problems of noise in the current detection error and the current signal of the device 20 to be detected are solved.

For example, fig. 5 shows a schematic structure of the signal amplifying unit 1022 provided in this embodiment, please refer to fig. 5, the signal amplifying unit 1022 includes: the digital signal processor comprises a first comparator cmp1, a second comparator cmp2, a first connector Header1, a second connector Header2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first capacitor C1, a first diode D1 and a second diode D2.

The first signal transmission end of the first connector Header1 is connected to the first end of the first resistor R1, and the second signal transmission end of the first connector Header1 is the first input end of the signal amplification unit 1022, wherein the first connector Header1 can realize compatible input and output of a current signal, and further the signal amplification unit 1022 and the signal feedback unit 1021 can realize compatible transmission of the signal, thereby ensuring conversion and transmission accuracy of the current signal.

A second end of the first resistor R1, an anode of the first diode D1 and a cathode of the second diode D2 are commonly connected to a first input end of the first comparator cmp1, a cathode of the first diode D1 is connected to the first direct-current power supply VCC1, and an anode of the second diode D2 is grounded GND; optionally, the first dc power supply VCC1 is a 0.1V-10V dc power supply, wherein the first diode D1 and the second diode D2 may function to stabilize voltage, so that the current signal is kept in a stable and safe transmission state in the signal amplification unit 1022, and the current signal is prevented from being distorted in the signal amplification unit 1022.

A first end of the second resistor R2 and a first end of the third resistor R3 are commonly connected to a second input end of the first comparator cmp1, a second end of the second resistor R2 is grounded GND, a second end of the third resistor R3 and a first end of the fourth resistor R4 are commonly connected to an output end of the first comparator cmp1, a ground end of the first comparator cmp1 is grounded GND, a power supply end of the first comparator cmp1 and a first end of the first capacitor C1 are commonly connected to the second direct-current power supply VCC2, and a second end of the first capacitor C1 is grounded GND; optionally, the second dc power VCC2 is a 0.1V-10V dc power, and the first comparator cmp1 can implement a signal comparison and amplification function through the second dc power VCC2, so that the first current signal has higher current amplification accuracy.

The second end of the fourth resistor R4, the first end of the fifth resistor R5 and the first end of the sixth resistor R6 are commonly connected to the first input end of the second comparator cmp2, and the second input end of the second comparator cmp2 is connected to the second control module 105; when the signal amplifying unit 1022 is in the digital output mode, the second control module 105 outputs the reference voltage to the second input terminal of the second comparator cmp2, so that the second comparator cmp2 generates a corresponding digital signal (second current signal) according to the difference between the current signal and the reference voltage, and the true current amplitude of the device 20 to be detected can be accurately obtained through the second current signal, so that the signal amplifying unit 1022 has high digital signal conversion accuracy and conversion efficiency; the reference voltage provides reference level information to the second comparator cmp2, and the second comparator cmp2 converts the reference level information into a digital signal according to a difference between the amplitude of the first current signal and the reference voltage, so that the signal amplification unit 1022 can output an accurate current detection result in a digital output mode; the second control module 105 can directly control the operating state of each electronic component in the signal amplifying unit 1022, so as to complete the reference voltage switching-in operation of the signal amplifying unit 1022 in the digital output mode, the signal amplifying unit 1022 can output a second current signal with higher precision, the signal amplifying unit 1022 can output the second current signal in each technical field in a compatible manner, and the output precision of the current detection result is higher.

A second end of the fifth resistor R5 is grounded GND, a second end of the sixth resistor R6 and a first end of the seventh resistor R7 are commonly connected to an output end of the second comparator cmp2, a second end of the seventh resistor R7 is connected to a second signal transmission end of the second connector Header2, a first signal transmission end of the second connector Header2 is connected to the first control module 103, and then the first signal transmission end of the second connector Header2 transmits the second current signal to the first control module 103, so as to ensure the accuracy of the second current signal; the second connector Header2 may function as a current signal compatible transmission.

In the specific power configuration of the signal amplification unit 1022 shown in fig. 5, a precise proportional amplification function is performed on the first current signal by using the first comparator cmp1 and the second comparator cmp2, so that a conversion operation of current information is realized, the conversion precision of the current signal is extremely high, and the current detection step of the current detection circuit 10 is simplified; the signal amplifying unit 1022 can output the second current signal with high accuracy in both the analog output mode and the digital output mode, and the application range of the signal amplifying unit 1022 is increased, so that the current sampling accuracy of the current detection circuit 10 in each industrial technical field is higher.

As an optional implementation manner, fig. 6 shows a schematic circuit structure of the detection module 101 provided in this embodiment, please refer to fig. 6, where the detection module 101 includes: an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a first switch tube Q1, a second switch tube Q2 and a third switch tube Q3; the first end of the eighth resistor R8 and the first conducting end of the first switch tube Q1 are commonly connected to the device 20 to be detected, and then the eighth resistor R8 can accurately acquire the small current change of the device 20 to be detected, the control end of the first switch tube Q1 and the control end of the second switch tube Q2 are commonly connected to the second end of the eighth resistor R8, the second conducting end of the first switch tube Q1 is connected to the first end of the ninth resistor R9, and the second end of the ninth resistor R9 is grounded GND.

The first conducting terminal of the first switch Q1 is connected to the signal processing module 102, and after the detection module 101 detects and converts the current information, the first conducting terminal of the first switch Q1 is used to quickly transmit the first current signal to the signal processing module 102.

The second conducting end of the first switch tube Q1 is connected to the first end of the tenth resistor R10, the second end of the tenth resistor R10 is connected to the control end of the third switch tube Q3, the first conducting end of the third switch tube Q3 is connected to the second control module 105, and the second conducting end of the third switch tube Q3 is connected to the GND.

Optionally, the first switching tube Q1 is an MOS tube or a triode, the second switching tube Q2 is an MOS tube or a triode, and the third switching tube Q3 is an MOS tube or a triode.

Fig. 6 shows a schematic circuit structure of the detection module 101, where the detection module 101 has a relatively simplified circuit structure, and can monitor the small current variation of the device to be detected 20 in real time, so as to improve the sensitivity of the detection module 101 to current detection; and when the first control module 103 sends a gear switching instruction, the second control module 105 can control the on or off state of the third switching tube Q3, the gear of the detection module 101 can be changed in a self-adaptive manner, the gear passing through the detection module 101 has high self-adaptive adjustment performance, so that the detection module 101 outputs the first current signal in real time under a safe detection range, the gear control efficiency and the current sampling safety of the detection module 101 are greatly improved, the current sampling process of the current sampling circuit 10 in the embodiment has higher adjustability and flexibility, the gear switching step of the detection module 101 is simplified, and the practical value is higher.

As an alternative implementation, fig. 6 shows another structural schematic of the current detection circuit 10 provided in this embodiment, and compared with the structural schematic of the current detection circuit 10 in fig. 1, the current detection circuit 10 in fig. 6 includes a signal input module 107 and a signal display module 108, where the signal input module 107 is connected to the first control module 103, and the signal display module 108 is connected to the first control module 103.

The signal input module 107 is used for generating a measuring range reference signal; the first control module 103 determines whether the amplitude of the second current signal is in the detection range of the current detection circuit 10 according to the amplitude difference between the second current signal and the range reference signal.

The range reference signal contains range reference information, the detection range of the current detection circuit 10 can be accurately obtained through the range reference signal, when the first control module 103 receives the range reference signal, the first control module 103 judges whether the gear of the current detection circuit 10 is in a reasonable state or not by comparing the difference value between the current amplitudes, and only when the amplitude of the second current signal is in the detection range of the current detection circuit 10, the current detection circuit 10 can safely output a high-precision current detection result; therefore, in this embodiment, the range reference signal provides the range detection standard for the current detection circuit 10, and then the first control module 103 can accurately determine whether the amplitude of the second current signal matches the detection range of the current detection circuit 10 according to the range reference signal, the first control module 103 can realize accurate gear shifting according to the range determination result of the amplitude of the second current signal, the signal processing module 102 can safely output the current detection result, and the control stability is higher.

The signal display module 108 is configured to display a measurement range determination result of the amplitude of the second current signal.

Optionally, the signal display module 108 includes an LED (Light Emitting Diode) lamp; whether the current amplitude of the device to be detected 20 is matched with the detection range of the current detection circuit 10 or not can be accurately obtained through the LED lamp, so that a technician can intuitively obtain whether the detection range of the current detection circuit 10 is reasonable or not through the light-emitting state of the signal display module 108, and the man-machine experience of the signal detection circuit 10 is better; therefore, in the present embodiment, whether the current detection circuit 10 needs to perform gear shifting can be definitely known by setting the signal display module 108, the range switching rate and precision of the current detection circuit 10 can be increased by the range determination result displayed by the signal display module 108, the current detection precision of the current detection circuit 10 is higher and the application range is wider, the amplitude of the second current signal output by the signal processing module 102 can completely meet the preset detection precision, the controllability and flexibility of the current detection circuit 10 are improved, and further, the signal display module 108 brings higher use experience to the user; the problems that the current detection circuit 10 outputs a second current signal under the condition that the operation current amplitude of the equipment to be detected 20 is not matched, the current detection circuit 10 has a large current detection error, and the safety is low are solved.

As an alternative implementation, fig. 8 shows another structural schematic of the current detection circuit 10 provided in this embodiment, and compared with the structural schematic of the current detection circuit 10 in fig. 1, the current detection circuit 10 in fig. 8 includes a signal output module 109, where the signal output module 109 is connected to the first control module 103, and the signal output module 109 is used to output and display the second current signal.

Optionally, the signal output module 109 is connected to an external electronic device, the second current signal is output to the electronic device through the signal output module 109, the current amplitude of the device 20 to be detected can be accurately obtained through the electronic device, a technician can obtain a corresponding current detection result in real time through the electronic device, and the use experience is better; optionally, the electronic device is an industrial personal computer or a notebook computer; in the embodiment, the communication compatibility and the current signal transmission stability of the current detection circuit 10 are improved through the signal output module 109, and the current detection circuit 10 is applicable to various different industrial technical fields; after the current detection circuit 10 completes current detection on the operating current of the device to be detected 20, the signal output module 109 outputs a current detection result in the form of a digital signal or an analog signal to meet the current measurement precision requirement of a technician, and the operating current amplitude of the device to be detected 20 can be accurately obtained through the second current signal output by the signal output module 109, so that the problems that the current detection circuit 10 is interfered by noise in the process of outputting the current detection result, the current detection result has errors, and the compatibility is low are solved.

As an optional implementation, the second control module 102 is further configured to: after receiving the gear driving signal, controlling the detection module 101 to disconnect from the device to be detected 20; after the gear of the detection module 101 is switched according to the gear driving signal, the detection module 101 is controlled to maintain the connection state with the device to be detected 20.

When the second control module 102 receives the gear driving signal, it indicates that the gear of the detection module 101 is not matched with the current amplitude of the device to be detected 20, at this time, the detection range of the current detection circuit 10 needs to be changed, and the current information of the device to be detected 20 needs to be re-sampled; before the gear shifting of the detection module 101, the physical connection between the detection module 101 and the device to be detected 20 is disconnected in the embodiment, so that current flowing into the detection module 101 in the gear shifting process is prevented; after the gear switching of the detection module 101 is completed by the second control module 102, the physical connection between the detection module 101 and the device to be detected 20 is restored, and the current amplitude of the device to be detected 20 can be detected again by the detection module 101 until the current detection result sampled by the current detection circuit 10 completely meets the preset current detection precision, and the second control module 105 has higher gear switching sensitivity; therefore, in the process of switching the gear by the detection module 101, the detection module 101 outputs the current off state, so that the gear switching safety and accuracy of the detection module 101 are improved, the electric energy safety of each electronic component in the current detection circuit 10 in the detection range switching process is ensured, and the detection module 101 has higher physical safety and application range.

Fig. 9 shows a specific implementation flow of the current detection method provided in this embodiment, please refer to fig. 9, where the current detection method specifically includes:

step S101: detecting the operating current of the equipment to be detected at a first gear and generating a first current signal; wherein the first gear is a preset gear.

Step S102: and carrying out denoising processing and signal amplification processing on the first current signal to obtain a second current signal.

Step S103: receiving and judging whether the amplitude of the second current signal is in a detection range or not; it should be noted that the detection ranges and the shift positions have a one-to-one correspondence relationship.

Step S104: if the amplitude of the second current signal is in the detection range, the second current signal is judged to be a required optimized signal and output; the second current signal is a current detection result of the equipment to be detected, and the high-precision current detection function of the equipment to be detected is realized.

Step S105: and if the amplitude of the second current signal is not in the detection range, switching the gear, and detecting the operating current of the equipment to be detected under the switched gear.

It should be noted that step S101, step S102, step S103, step S104, and step S105 in fig. 9 are only examples, and do not mean that each step in the current detection method must be executed according to the connection sequence between each step in fig. 9; in practical applications, the sequence between the steps in the current detection method may be changed, for example, step S105 is set before step S104, and the operation steps in the current detection method are not specifically limited herein.

As a specific implementation manner, fig. 10 shows a specific implementation flow of step S104 of the current detection method provided in this embodiment, referring to fig. 9, in step S104, if the amplitude of the second current signal is in the detection range, the current detection method further includes:

step S1041: and judging the type of the second current signal, and switching the output mode of the second current signal according to the judgment result.

Step S1042: if the second current signal is an analog signal, the output mode of the second current signal is switched to the analog output mode, so that the second current signal is output in the analog output mode.

Step S1043: if the second current signal is a digital signal, the output mode of the second current signal is switched to a digital output mode, so that the second current signal is output in the digital output mode.

It should be noted that the specific implementation flows of the steps of the current detection method in fig. 9 to 10 correspond to the current detection circuit 10 in fig. 1 to 8, and therefore, the specific implementation of the operation steps of the current detection method in fig. 9 to 10 can refer to the embodiment in fig. 1 to 8, and will not be described again here.

In the embodiment, the current detection method can acquire the operating current information of the equipment to be detected at a preset gear, and process the operating current information to obtain a second current signal; then judging whether the amplitude of the second current signal is matched with the detection range, if the amplitude of the second current signal is not in the detection range, switching gears in the current detection process, and acquiring the operating current of the equipment to be detected again in the switched detection range; the current detection method is repeated until the amplitude of the second current signal obtained after current sampling meets the current sampling precision requirement of technicians, the current detection method can directly output the second current signal, and the second current signal is used as a current sampling result, can be universally applied to different industrial technical fields, and ensures the compatibility and the application range of the current sampling circuit; therefore, the current detection method in the embodiment can automatically switch gears according to the current amplitude of the equipment to be detected, the control of the current sampling process is simple and convenient, the method is applicable to the current accurate sampling process of various types of equipment to be detected, the compatibility is strong, the current sampling method can output a current sampling result under the detection range matched with the circuit amplitude of the equipment to be detected, the accuracy and the precision of current sampling are guaranteed, the error of current sampling is reduced, the safety and the stability of current sampling are improved, the second current signal output by the current detection method can accurately reflect the real current amplitude of the equipment to be detected, the embodiment has more simplified current sampling steps, the controllability and the flexibility are strong, and the safety and the reliability of circuit control are guaranteed; the problem that in the prior art, the measuring range of the current detection method cannot be automatically switched according to the current amplitudes of different types of equipment to be detected, the operation is complex, the current detection result precision is low, the compatibility is poor, the safety of current detection is seriously damaged under the condition that the current amplitude of the equipment to be detected is unknown, and the control stability of a circuit system is low is effectively solved.

In summary, the current detection circuit in this embodiment may obtain current information of the device to be detected in real time, and then, after processing the current information, determine whether the current detection result meets the preset current sampling precision, if the current detection result does not meet the preset current sampling precision, switch the gear of the detection module to resample the operating current of the device to be detected in the switched detection range, and thus, repeatedly, the current sampling circuit outputs a high-precision current sampling result in the detection range matched with the current amplitude of the device to be detected, the operation is simple and convenient, and the conversion efficiency of the current information is high; the current detection circuit in the embodiment has the function of automatically switching gears for the current of the equipment to be detected, so that the safety is high, and the working efficiency of technicians is greatly improved; therefore, the current detection circuit has positive promotion function in improving the current sampling precision and the current sampling safety, and has important industrial value.

Various embodiments are described herein for various devices, circuits, apparatuses, systems, and/or methods. Numerous specific details are set forth in order to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. However, it will be understood by those skilled in the art that the embodiments may be practiced without such specific details. In other instances, well-known operations, components and elements have been described in detail so as not to obscure the embodiments in the description. It will be appreciated by those of ordinary skill in the art that the embodiments herein and shown are non-limiting examples, and thus, it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.

Reference throughout the specification to "various embodiments," "in an embodiment," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with features, structures, or characteristics of one or more other embodiments without presuming that such combination is not an illogical or functional limitation. Any directional references (e.g., plus, minus, upper, lower, upward, downward, left, right, leftward, rightward, top, bottom, above …, below …, vertical, horizontal, clockwise, and counterclockwise) are used for identification purposes to aid the reader's understanding of the present disclosure, and do not create limitations, particularly as to the position, orientation, or use of the embodiments.

Although certain embodiments have been described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the scope of this disclosure. Joinder references (e.g., attached, coupled, connected, and the like) are to be construed broadly and may include intermediate members between a connection of elements and relative movement between elements. Thus, connection references do not necessarily imply that two elements are directly connected/coupled and in a fixed relationship to each other. The use of "for example" throughout this specification should be interpreted broadly and used to provide non-limiting examples of embodiments of the disclosure, and the disclosure is not limited to such examples. It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not limiting. Changes in detail or structure may be made without departing from the disclosure.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

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