阅读说明：本技术 一种电刺激开路检测电路 (Electrical stimulation open circuit detection circuit ) 是由 何永正 周志杰 黄晓乐 苏世鑫 于 2020-04-03 设计创作，主要内容包括：本申请公开了一种电刺激开路检测电路,包括第一电压采集电路,第二电压采集电路、隔离变压器以及处理器；所述第一电压采集电路与电极片串联,用于采集电压；所述隔离变压器的原边线圈与所述第一电压采集电路并联,所述隔离变压器的副边线圈与所述第二电压采集电路并联,用于对所述第一电压采集电路采集的电压进行隔离与放大处理,并在所述第二电压采集电路两端形成电势；所述第二电压采集电路的正极连接所述处理器,用于输出电压信号至所述处理器；所述处理器,用于依据所述电压信号得到所述电极片的状态。该电刺激开路检测电路能够准确可靠的识别在治疗过程中电极片是否发生脱落。(The application discloses an electrical stimulation open circuit detection circuit, which comprises a first voltage acquisition circuit, a second voltage acquisition circuit, an isolation transformer and a processor; the first voltage acquisition circuit is connected with the electrode slice in series and is used for acquiring voltage; the primary coil of the isolation transformer is connected with the first voltage acquisition circuit in parallel, and the secondary coil of the isolation transformer is connected with the second voltage acquisition circuit in parallel, so that the voltage acquired by the first voltage acquisition circuit is isolated and amplified, and a potential is formed at two ends of the second voltage acquisition circuit; the positive electrode of the second voltage acquisition circuit is connected with the processor and is used for outputting a voltage signal to the processor; and the processor is used for obtaining the state of the electrode plate according to the voltage signal. The electrical stimulation open-circuit detection circuit can accurately and reliably identify whether the electrode plate falls off in the treatment process.)

1. An electrical stimulation open circuit detection circuit, comprising:

the device comprises a first voltage acquisition circuit, a second voltage acquisition circuit, an isolation transformer and a processor;

the first voltage acquisition circuit is connected with the electrode slice in series and is used for acquiring voltage;

the primary coil of the isolation transformer is connected with the first voltage acquisition circuit in parallel, and the secondary coil of the isolation transformer is connected with the second voltage acquisition circuit in parallel, so that the voltage acquired by the first voltage acquisition circuit is isolated and amplified, and a potential is formed at two ends of the second voltage acquisition circuit;

the second voltage acquisition circuit is connected with the processor and is used for outputting a voltage signal to the processor;

and the processor is used for obtaining the state of the electrode plate according to the voltage signal.

2. The electrical stimulation open circuit detection circuit of claim 1, wherein the first voltage acquisition circuit comprises a first resistor and the second voltage acquisition circuit comprises a second resistor.

3. The electrical stimulation open circuit detection circuit of claim 2, further comprising:

an amplifying circuit; the input end of the amplifying circuit is connected with the second voltage acquisition circuit, and the output end of the amplifying circuit is connected with the processor.

4. An electrical stimulation open circuit detection circuit as claimed in claim 3, characterized in that the amplification circuit comprises:

the circuit comprises an operational amplifier, a third resistor, a fourth resistor, a fifth resistor, a first capacitor and a second capacitor;

the non-inverting input end of the operational amplifier is connected with the anode of the second voltage acquisition circuit after being connected in series with the third resistor, the inverting input end of the operational amplifier is connected with the ground after being connected in series with the fourth resistor and is connected with the output end of the operational amplifier after being connected in series with the fifth resistor, the anode power end and the cathode power end of the operational amplifier are respectively connected with the anode and the cathode of a power supply and are respectively connected with the first capacitor and the second capacitor in series and then are connected with the ground, and the output end of the operational amplifier is connected with the processor.

5. The electrical stimulation open circuit detection circuit of claim 4, further comprising:

a rectifier diode; the rectifier diode is connected in series with the second voltage acquisition circuit.

6. The electrical stimulation open circuit detection circuit according to claim 5, wherein the processor is further configured to stop outputting electrical stimulation when the electrode pad is in a drop-off state according to the voltage signal.

7. The electrical stimulation open circuit detection circuit according to claim 6, wherein the processor is further configured to resume outputting electrical stimulation after the duration of stopping outputting electrical stimulation reaches a preset duration, and when it is detected that the electrode pad resumes contacting with the patient, increase the intensity of the electrical stimulation in a stepwise manner according to a preset time interval until the intensity of the electrical stimulation is consistent with the intensity of the electrical stimulation before the electrode pad falls off.

8. The electrical stimulation open circuit detection circuit of claim 7, wherein the processor is further configured to activate an alarm device to alarm if the electrode pad is still in a falling state after the electrical stimulation is resumed.

9. The electrical stimulation open circuit detection circuit of claim 8, wherein the processor is specifically a single chip microcomputer.

10. An electrical stimulation open circuit detection circuit as claimed in claim 9, characterized in that the alarm means is in particular a buzzer.

Technical Field

The application relates to the technical field of circuits, in particular to an electrical stimulation open-circuit detection circuit.

Background

For an electrical stimulation product, a very high voltage is generated after the treatment electrode plate leaves a treatment part of a human body due to the contact problem, so that the condition of an electric person can be generated when the treatment electrode plate contacts the treatment part again, and poor treatment experience is brought to a patient. In view of the above situation, some of the existing electrical stimulation products have output indication functions, which are roughly classified into two types, one is that the output indication is an output indicator light, and the other is that electrical stimulation is being output on a display screen by the flickering of a specific output identifier, so as to prompt a patient to use the electrical stimulation. The technical scheme that the specific identifier represents the output state in the display screen is adopted, because the output indication flicker of the screen is controlled by the MCU, even if the electrode slice falls off, the display screen still flickers, and therefore the function of warning is not achieved at all. In addition, the technical scheme that the output indicator lamp is connected in series in the output loop can be directly extinguished when the electrode plate falls off, but the indicator lamp is driven by adopting the mode to have a driving current, otherwise, the brightness of the output indicator lamp is too low or the output indicator lamp is always in an extinguished state, namely, the electrical stimulation needs to reach a certain degree, and the indication function cannot be achieved at all when the output intensity is too low.

In view of the above, how to improve the accuracy and reliability of the electrical stimulation open circuit detection has become an urgent technical problem to be solved by those skilled in the art.

Disclosure of Invention

The application aims at providing an electrostimulation open circuit detection circuit which can accurately and reliably identify whether electrode plates fall off in the treatment process.

In order to solve the above technical problem, the present application provides an electrical stimulation open circuit detection circuit, including:

the device comprises a first voltage acquisition circuit, a second voltage acquisition circuit, an isolation transformer and a processor;

the first voltage acquisition circuit is connected with the electrode slice in series and is used for acquiring voltage;

the primary coil of the isolation transformer is connected with the first voltage acquisition circuit in parallel, and the secondary coil of the isolation transformer is connected with the second voltage acquisition circuit in parallel, so that the voltage acquired by the first voltage acquisition circuit is isolated and amplified, and a potential is formed at two ends of the second voltage acquisition circuit;

the second voltage acquisition circuit is connected with the processor and is used for outputting a voltage signal to the processor;

and the processor is used for obtaining the state of the electrode plate according to the voltage signal.

Optionally, the first voltage acquisition circuit includes a first resistor, and the second voltage acquisition circuit includes a second resistor.

Optionally, the method further includes:

an amplifying circuit; the input end of the amplifying circuit is connected with the anode of the second voltage acquisition circuit, and the output end of the amplifying circuit is connected with the processor.

Optionally, the amplifying circuit includes:

the non-inverting input end of the operational amplifier is connected with the anode of the second voltage acquisition circuit after being connected in series with the third resistor, the inverting input end of the operational amplifier is connected with the ground after being connected in series with the fourth resistor and is connected with the output end of the operational amplifier after being connected in series with the fifth resistor, the anode power end and the cathode power end of the operational amplifier are respectively connected with the anode and the cathode of a power supply and are respectively connected with the first capacitor and the second capacitor in series and then are connected with the ground, and the output end of the operational amplifier is connected with the processor.

Optionally, the method further includes:

a rectifier diode; the rectifier diode is connected in series with the second voltage acquisition circuit.

Optionally, the processor is further configured to stop outputting the electrical stimulation when the electrode slice is in a falling state according to the voltage signal.

Optionally, the processor is further configured to resume outputting the electrical stimulation after the time length for stopping outputting the electrical stimulation reaches a preset time length, and increase the intensity of the electrical stimulation in a stepwise manner according to a preset time interval until the intensity of the electrical stimulation is consistent with the intensity of the electrical stimulation before the electrode pad falls off after the electrode pad is detected to resume contacting with the patient.

Optionally, the processor is further configured to start an alarm device to alarm if the electrode plate is still in a falling state after the output of the electrical stimulation is resumed.

Optionally, the processor is specifically a single chip microcomputer.

Optionally, the alarm device is specifically a buzzer.

The application provides an electrical stimulation detection circuitry that opens a way includes: the device comprises a first voltage acquisition circuit, a second voltage acquisition circuit, an isolation transformer and a processor; the first voltage acquisition circuit is connected with the electrode slice in series and is used for acquiring voltage; the primary coil of the isolation transformer is connected with the first voltage acquisition circuit in parallel, and the secondary coil of the isolation transformer is connected with the second voltage acquisition circuit in parallel, so that the voltage acquired by the first voltage acquisition circuit is isolated and amplified, and a potential is formed at two ends of the second voltage acquisition circuit; the second voltage acquisition circuit is connected with the processor and is used for outputting a voltage signal to the processor; and the processor is used for obtaining the state of the electrode plate according to the voltage signal.

It is thus clear that the electrical stimulation detection circuitry that opens a way that provides sets up first voltage acquisition circuit and gathers voltage in electrode slice place return circuit, in addition, set up isolation transformer, in order to keep apart the voltage of electrical stimulation and control circuit's voltage, effectively avoided electrical stimulation output voltage to damage control system electricity, secondly, utilize isolation transformer still to carry out signal amplification to first voltage acquisition circuit's voltage, can effectively avoid original signal undersize and cause the unsafe problem of treater detection, very big improvement the accuracy and the reliability that the electrical stimulation detected that opens a way.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the prior art and the embodiments are briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic diagram of an electrical stimulation open circuit detection circuit according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of another electrical stimulation open circuit detection circuit provided in an embodiment of the present application.

Detailed Description

The core of the application is to provide an electrical stimulation open circuit detection circuit which can accurately and reliably identify whether the electrode plate falls off in the treatment process.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a schematic diagram of an electrical stimulation open-circuit detection circuit according to an embodiment of the present disclosure, and referring to fig. 1, the electrical stimulation open-circuit detection circuit includes:

a first voltage acquisition circuit 10, a second voltage acquisition circuit 20, an isolation transformer T and a processor 30;

the first voltage acquisition circuit 10 is connected in series with the electrode slice and is used for acquiring voltage;

a primary coil of the isolation transformer T is connected in parallel with the first voltage acquisition circuit 10, and a secondary coil of the isolation transformer T is connected in parallel with the second voltage acquisition circuit 20, and is used for isolating and amplifying the voltage acquired by the first voltage acquisition circuit 10 and forming a potential at two ends of the second voltage acquisition circuit 20;

the second voltage acquisition circuit 20 is connected to the processor 30 and is configured to output a voltage signal to the processor 30;

and the processor 30 is used for obtaining the state of the electrode slice according to the voltage signal.

Specifically, the electrical stimulation open circuit detection circuit provided by the present application mainly includes a first voltage acquisition circuit 10, a second voltage acquisition circuit 20, an isolation transformer T, and a processor 30. The first voltage acquisition circuit 10 is connected in series to a loop where the electrode plate is located, and is responsible for acquiring voltage. In the treatment process, when the electrode slice falls off, that is, when the electrode slice does not contact with the patient, the voltage that can be collected by the first voltage collecting circuit 10 is zero, and when the electrode slice does not fall off, that is, when the electrode slice normally contacts with the patient, the voltage that can be collected by the first voltage collecting circuit 10 is nonzero.

The primary winding of the isolation transformer T is connected in parallel to the first voltage acquisition circuit 10, and the secondary winding of the isolation transformer T is connected in parallel to the second voltage acquisition circuit 20. On one hand, the isolation transformer T can play an isolation role to isolate the voltage of the electrical stimulation from the voltage of the control circuit, so as to prevent the electrical stimulation output voltage from electrically damaging the control system, and on the other hand, the isolation transformer T is further used for amplifying the voltage acquired by the first voltage acquisition circuit 10 and forming a potential at two ends of the second voltage acquisition circuit 20. Naturally, if the voltage collected by the first voltage collecting circuit 10 is zero, the potential formed by the isolation transformer at the two ends of the second voltage collecting circuit 20 is also zero; if the voltage collected by the first voltage collecting circuit 10 is non-zero, the potential formed by the isolation transformer across the second voltage collecting circuit 20 is also non-zero.

The second voltage collecting circuit 20 is connected to the processor 30, and is configured to output a voltage signal to the processor 30, so that the processor 30 obtains the state of the electrode plate according to the voltage signal. When the electrode plate falls off, the voltage signal output by the second voltage collecting circuit 20 is zero, and when the electrode plate does not fall off, the voltage signal output by the second voltage collecting circuit 20 is nonzero. Therefore, the processor 30 can determine whether the electrode plate falls off according to whether the received voltage signal is zero.

In one specific embodiment, the first voltage acquisition circuit 10 includes a first resistor R1, and the second voltage acquisition circuit 20 includes a second resistor R2.

Referring to fig. 2, in the present embodiment, the first voltage acquisition circuit 10 and the second voltage acquisition circuit 20 both adopt a simpler circuit design, the first resistor R1 is connected in series to a loop where the electrode plate is located as the first voltage acquisition circuit 10, after electrical stimulation is started, if the electrode plate is normally in contact with a patient, current flows through the first resistor R1 at this time, a potential difference is formed at two ends of the first resistor R1, and the voltage acquired by the first resistor R1 is nonzero; on the contrary, after the electrical stimulation is turned on, if the electrode pad is not in contact with the patient, no current flows through the first resistor R1 at this time, and thus the voltage collected by the first resistor R1 is zero. The primary coil of the isolation transformer T is connected in parallel with a first resistor R1, and the secondary coil is connected in parallel with a second resistor R2. Similarly, after the electrical stimulation is started, if the electrode slice normally contacts with the patient, the voltage collected by the first resistor R1 is amplified by the isolation transformer T, and then the potential formed at the two ends of the second resistor R2 is nonzero, if the electrode slice does not contact with the patient, the voltage collected by the first resistor R1 is zero, and the potential formed at the two ends of the second resistor R2 is also zero after the voltage is amplified by the isolation transformer T.

The processor 30 is connected to the second voltage acquisition circuit 20, specifically to the anode of the second voltage acquisition circuit, and is configured to obtain the state of the electrode plate according to the voltage signal output by the second voltage acquisition circuit 20. Specifically, if the voltage signal output by the second voltage collecting circuit 20 is zero, it is determined that the electrode sheet falls off, and if the voltage signal output by the second voltage collecting circuit 20 is non-zero, it is determined that the electrode sheet is normally in contact and does not fall off.

Because the equivalent load of the human body in the electrical stimulation is 500 ohms, when the electrical stimulation signal is small, the voltage signal generated at the two ends of the second resistor R2 is still likely to be small even after being amplified by the isolation transformer T, if the signal is directly acquired by the processor 30, the acquired signal value is small and quite unstable, and is easily subjected to interference signals caused by external environmental factors, so that the accuracy of the acquisition is affected, and therefore, in order to further ensure the effective and reliable realization of the state detection of the electrode plate, in a specific implementation mode, the electrical stimulation open-circuit detection circuit further comprises an amplification circuit; the input end of the amplifying circuit is connected with the second voltage collecting circuit 20, and the output end of the amplifying circuit is connected with the processor 30.

Specifically, the electrical stimulation open circuit detection circuit in this embodiment is further provided with an amplifying circuit, an input end of the amplifying circuit is connected to the positive electrode of the second voltage acquisition circuit 20, and an output end of the amplifying circuit is connected to the processor 30, so that the amplifying circuit is used for amplifying the voltage signal acquired by the second voltage acquisition circuit 20 and then enabling the voltage signal to be read by the processor, thereby ensuring the accuracy of the signal.

As shown in fig. 2, as a specific embodiment, the amplifying circuit includes an operational amplifier, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, and a second capacitor C2; the non-inverting input terminal of the operational amplifier is connected in series with the third resistor R3 and then connected to the anode of the second voltage acquisition circuit 20, the inverting input terminal of the operational amplifier is connected in series with the fourth resistor R4 and then grounded and connected in series with the fifth resistor R5 and then connected to the output terminal of the operational amplifier, the anode power supply terminal and the cathode power supply terminal of the operational amplifier are respectively connected to the anode and the cathode of the power supply and are respectively connected in series with the first capacitor C1 and the second capacitor C2 and then grounded, and the output terminal of the operational amplifier is connected to the processor 30. That is, in this embodiment, the amplifying circuit specifically adopts a forward amplifying circuit, so that the forward amplifying circuit is used to amplify the voltage signal. The output end of the operational amplifier may be connected to the processor 30 after being connected to a resistor in series, and in addition, one end of the resistor connected to the processor 30 may be connected to a backward diode, specifically to the cathode of the backward diode, and the anode of the backward diode is grounded, thereby playing a role in protecting the processor 30.

Further, on the basis of the foregoing embodiment, as a specific implementation manner, the electrical stimulation open circuit detection circuit further includes:

a rectifier diode D; the rectifier diode D is connected in series with the second voltage acquisition circuit 20.

Specifically, referring to fig. 2, in the case where the electrical stimulation is an intermediate frequency wave, since the intermediate frequency wave belongs to a bidirectional symmetric wave, the electrical stimulation open circuit detection circuit in this embodiment further includes a rectifier diode D, which is connected in series with the second voltage acquisition circuit 20, and in the case where the second voltage acquisition circuit 20 is a resistor, that is, the rectifier diode D is connected in series with the second resistor R2, and is used for rectifying a signal output by the secondary winding of the isolation transformer T.

Further, on the basis of the above embodiment, as a specific implementation manner, the processor 30 is further configured to stop outputting the electrical stimulation when the electrode slice is in the falling state by analyzing the voltage signal.

Specifically, on the basis of analyzing the voltage signal to determine that the electrode pad is in the off state, that is, when the electrode pad does not contact the body of the patient, the processor 30 may further control the electrical stimulation driver to stop outputting the electrical stimulation.

In addition, on the basis of the foregoing embodiment, as a specific implementation manner, the processor 30 is further configured to resume outputting the electrical stimulation after the time period for stopping outputting the electrical stimulation reaches the preset time period, and when it is detected that the electrode pad resumes contacting with the patient, increase the intensity of the electrical stimulation in a stepwise manner according to the preset time interval until the intensity of the electrical stimulation is consistent with the intensity of the electrical stimulation before the electrode pad falls off.

Specifically, in this embodiment, the processor 30 analyzes the voltage signal to determine that the electrode pad is in the off state, and controls the electrical stimulation driver to stop outputting the electrical stimulation, and after the time length for stopping outputting the electrical stimulation reaches the preset time length, the processor 30 further resumes outputting the electrical stimulation, and after detecting that the electrode pad is restored to contact with the patient, increases the intensity of the electrical stimulation in a stepwise manner according to the preset time interval until the intensity of the electrical stimulation is consistent with the intensity of the electrical stimulation before the electrode pad is off.

After the electrode plate is detected to fall off, the automatic output recovery capability is further provided besides stopping outputting the electrical stimulation, so that the electrical stimulation open circuit detection circuit is more convenient and humanized to use.

For the specific values of the preset duration and the preset time interval, the application is not particularly limited, and difference setting can be performed according to actual application needs.

Further, on the basis of the above embodiment, as a specific implementation manner, the processor 30 is further configured to start an alarm device to alarm if the electrode slice is still in the falling state after the output of the electrical stimulation is resumed.

Specifically, in this embodiment, the processor 30 analyzes the voltage signal to determine that the electrode pad is in the off state, and controls the electrical stimulation driver to stop outputting the electrical stimulation, and after the electrical stimulation is resumed when the time length for stopping outputting the electrical stimulation reaches the preset time length, if the electrode pad is still in the off state, the processor 30 starts the alarm device to alarm, so as to prompt a user to check whether the electrode pad is in good contact.

Similarly, the specific types of the processor 30 and the alarm device are not specifically limited in this application, and may be set appropriately according to actual needs.

In a specific embodiment, the processor 30 may be a single chip microcomputer, and the alarm device may be a buzzer, that is, after the output of the electrical stimulation is resumed, if the electrode slice is still in the falling state, the buzzer sounds to alarm.

In summary, the electrical stimulation open circuit detection circuit provided by the present application includes: the device comprises a first voltage acquisition circuit, a second voltage acquisition circuit, an isolation transformer and a processor; the first voltage acquisition circuit is connected with the electrode slice in series and is used for acquiring voltage; the primary coil of the isolation transformer is connected with the first voltage acquisition circuit in parallel, and the secondary coil of the isolation transformer is connected with the second voltage acquisition circuit in parallel, so that the voltage acquired by the first voltage acquisition circuit is isolated and amplified, and a potential is formed at two ends of the second voltage acquisition circuit; the second voltage acquisition circuit is connected with the processor and is used for outputting a voltage signal to the processor; and the processor is used for obtaining the state of the electrode plate according to the voltage signal. This electrical stimulation detection circuit that opens a way sets up first voltage acquisition circuit and gathers voltage in electrode slice place return circuit, in addition, set up isolation transformer, in order to keep apart the voltage of electrical stimulation and control circuit's voltage, effectively avoided electrical stimulation output voltage to destroy control system electricity, secondly, utilize isolation transformer still can carry out signal amplification to first voltage acquisition circuit's voltage, can effectively avoid original signal undersize and cause the unsafe problem of treater detection, very big improvement the accuracy and the reliability that electrical stimulation detected that opens a way.

Because the situation is complicated and cannot be illustrated by a list, those skilled in the art can appreciate that there can be many examples in combination with the actual situation under the basic principle of the embodiments provided in the present application and that it is within the scope of the present application without sufficient inventive effort.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The electrical stimulation open circuit detection circuit provided by the present application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.