阅读说明：本技术 一种火电厂传感器故障诊断装置及诊断方法 (Thermal power plant sensor fault diagnosis device and diagnosis method ) 是由 秦小阳 崔猛 金彦昌 李建军 王安生 赵艳红 樊华 迟世蛟 白献锁 李智强 韩威 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种火电厂传感器故障诊断装置及诊断方法,该诊断装置包括：传感器采集模块,所述传感器采集模块用于采集传感器的参数信号并输出所述参数信号；故障判定模块,所述故障判定模块的输入端与所述传感器采集模块的输出端电连接,所述故障判定模块判断所述参数信号是否存在故障及所述参数信号的数值是否在预设范围内；故障报警模块,所述故障报警模块的输入端与所述故障判定模块的输出端电连接,所述故障报警模块显示故障类别和发出报警提示。本发明通过检测判故模块判断传感器是否存在故障,通过差值比较模块计算数字信号与预设定值之差的绝对值,判断传感器是否存在其他故障,提高了传感器故障诊断的精确度和准确性。(The invention discloses a fault diagnosis device and a fault diagnosis method for a sensor of a thermal power plant, wherein the diagnosis device comprises the following components: the sensor acquisition module is used for acquiring parameter signals of the sensor and outputting the parameter signals; the input end of the fault judgment module is electrically connected with the output end of the sensor acquisition module, and the fault judgment module judges whether the parameter signal has a fault and whether the value of the parameter signal is in a preset range; and the input end of the fault alarm module is electrically connected with the output end of the fault judgment module, and the fault alarm module displays the fault category and sends out an alarm prompt. The invention judges whether the sensor has faults or not through the detection and fault judgment module, calculates the absolute value of the difference between the digital signal and the preset value through the difference value comparison module, and judges whether the sensor has other faults or not, thereby improving the precision and accuracy of fault diagnosis of the sensor.)

1. A thermal power plant sensor failure diagnostic device, comprising:

the sensor acquisition module is used for acquiring parameter signals of the sensor and outputting the parameter signals;

the input end of the fault judgment module is electrically connected with the output end of the sensor acquisition module, and the fault judgment module judges whether the parameter signal has a fault and whether the value of the parameter signal is in a preset range;

and the input end of the fault alarm module is electrically connected with the output end of the fault judgment module, and the fault alarm module displays the fault category and sends out an alarm prompt.

2. The thermal power plant sensor fault diagnostic device of claim 1, wherein the sensor acquisition module comprises:

a sensor module that collects sensor parameter signals;

the input end of the converter module is electrically connected with the output end of the sensor module, and the converter module converts the acquired parameter signal into a standard electric signal;

and the input end of the A/D converter module is electrically connected with the output end of the converter module, and the A/D converter module converts the standard electric signal into a digital signal.

3. The thermal power plant sensor fault diagnostic apparatus according to claim 1, wherein the fault determination module includes:

and the input end of the detection fault judgment module is electrically connected with the output end of the A/D converter module, and the detection fault judgment module judges whether the sensor has a fault according to the digital signal.

4. The thermal power plant sensor fault diagnostic apparatus of claim 3, wherein the fault determination module further comprises:

the input module is used for setting preset values and parameter range values of the sensor;

and the input end of the difference comparison module is respectively and electrically connected with the output ends of the detection fault judgment module and the input module, when the detection fault judgment module judges that the digital signal has no fault, the digital signal is transmitted to the difference comparison module, and the difference comparison module calculates the absolute value of the difference between the digital signal and the preset value and compares the absolute value with the parameter range value.

5. The thermal power plant sensor fault diagnostic apparatus of claim 4, wherein the fault determination module further comprises:

the input end of the fault type matching module is respectively and electrically connected with the output ends of the fault detection and judgment module and the difference value comparison module, when the fault detection and judgment module judges that the digital signal has the fault, the digital signal is transmitted to the fault type matching module, the fault type matching module carries out fault matching identification, when the digital signal does not have the fault, the difference value comparison module transmits a result of comparing the absolute value with the parameter range value to the fault type matching module, and the fault type matching module carries out fault matching identification.

6. The thermal power plant sensor fault diagnostic device of claim 1, wherein the fault alarm module comprises:

the input end of the display module is electrically connected with the output end of the fault type matching module, and the display module is used for displaying the fault type of the sensor;

and the input end of the alarm module is electrically connected with the output end of the fault type matching module, and the alarm module is used for sending out the alarm prompt.

7. The thermal power plant sensor malfunction diagnosis device according to claim 1, wherein the sensor includes any one of a methane sensor, a carbon monoxide sensor, a wind speed sensor, a temperature sensor, and a humidity sensor.

8. A method for diagnosing faults of a sensor of a thermal power plant is characterized by comprising the following operation steps:

s1: setting the preset value and the parameter range value of the sensor through the input module;

s2: the sensor module collects the parameter signal of the sensor;

s3: the converter module converts the parameter signal of the sensor into the standard electric signal;

s4: the A/D converter module converts the standard electric signal into the digital signal;

s5: the detection fault judgment module judges whether the sensor has a fault according to the digital signal;

s6: when the digital signal has no fault, the difference value comparison module calculates the absolute value of the difference between the digital signal and the preset value and compares the absolute value with the parameter range value;

s7: when the digital signal has a fault, the fault type matching module carries out fault matching identification; when the absolute value is larger than the parameter range value, the fault type matching module carries out fault matching identification;

s8: when the sensor diagnoses a fault, the display module displays the fault category, and the alarm module sends out an alarm prompt.

9. The thermal power plant sensor fault diagnosis method according to claim 8, wherein the display module is a touch display screen.

10. The thermal power plant sensor fault diagnostic method of claim 8, wherein the alarm module includes a buzzer.

Technical Field

The invention belongs to the technical field of thermal power plant sensor diagnosis, and particularly relates to a thermal power plant sensor fault diagnosis device and method.

Background

With the development of the monitoring information system of the thermal power plant, the requirements on the accuracy and the reliability of the sensor for measuring the bottom layer are gradually improved. The monitoring system of each level of the thermal power plant takes data as a core, the calculation of all modules is carried out around the acquisition, transmission, processing analysis, storage, sharing and release of the data, and the accuracy of the calculation and analysis of each performance of the thermal power plant and the guiding significance of high-level functions are directly influenced by the correctness of the acquisition of the data.

In the production process of a thermal power plant, a plurality of physical quantities such as pressure, temperature, flow, liquid level, valve position and the like need to be acquired by sensors, and faults are easy to occur because measuring instruments of the thermal power plant often work in severe environments such as high temperature, vibration, corrosion and the like; the measurement data may also be subject to interference, drift, and measurement environment that produce random errors that are often difficult to detect intuitively. When parameter signals acquired by the sensors deviate from actual values and are within the effective acquisition measurement range, the prior art can not judge wrongly and still consider the acquired signals to be effective, wrong sensor signals can cause a system to make wrong decisions, so that inaccurate calculation is caused, energy waste is caused, the system is even paralyzed in serious conditions, and potential safety hazards in operation exist.

Disclosure of Invention

The invention aims to provide a device and a method for diagnosing the fault of the sensor of the thermal power plant, aiming at the defects in the prior art, and the device and the method for diagnosing the fault of the sensor of the thermal power plant can accurately judge that the parameter signal acquired by the sensor deviates from the actual value and is within the effective acquisition measurement range, confirm that the acquired parameter signal is invalid, improve the calculation accuracy, reduce the loss of manpower and material resources and prevent safety accidents.

In order to achieve the above object, the present invention provides a thermal power plant sensor failure diagnosis apparatus, including:

the sensor acquisition module is used for acquiring parameter signals of the sensor and outputting the parameter signals;

the input end of the fault judgment module is electrically connected with the output end of the sensor acquisition module, and the fault judgment module judges whether the parameter signal has a fault and whether the value of the parameter signal is in a preset range;

and the input end of the fault alarm module is electrically connected with the output end of the fault judgment module, and the fault alarm module displays the fault category and sends out an alarm prompt.

Optionally, the sensor acquisition module includes:

a sensor module that collects sensor parameter signals;

the input end of the converter module is electrically connected with the output end of the sensor module, and the converter module converts the acquired parameter signal into a standard electric signal;

and the input end of the A/D converter module is electrically connected with the output end of the converter module, and the A/D converter module converts the standard electric signal into a digital signal.

Optionally, the fault determination module includes:

and the input end of the detection fault judgment module is electrically connected with the output end of the A/D converter module, and the detection fault judgment module judges whether the sensor has a fault according to the digital signal.

Optionally, the fault determining module further includes:

the input module is used for setting preset values and parameter range values of the sensor;

and the input end of the difference comparison module is respectively and electrically connected with the output ends of the detection fault judgment module and the input module, when the detection fault judgment module judges that the digital signal has no fault, the digital signal is transmitted to the difference comparison module, and the difference comparison module calculates the absolute value of the difference between the digital signal and the preset value and compares the absolute value with the parameter range value.

Optionally, the fault determining module further includes:

the input end of the fault type matching module is respectively and electrically connected with the output ends of the fault detection and judgment module and the difference value comparison module, when the fault detection and judgment module judges that the digital signal has the fault, the digital signal is transmitted to the fault type matching module, the fault type matching module carries out fault matching identification, when the digital signal does not have the fault, the difference value comparison module transmits a result of comparing the absolute value with the parameter range value to the fault type matching module, and the fault type matching module carries out fault matching identification.

Optionally, the fault alarm module includes:

the input end of the display module is electrically connected with the output end of the fault type matching module, and the display module is used for displaying the fault type of the sensor;

and the input end of the alarm module is electrically connected with the output end of the fault type matching module, and the alarm module is used for sending out the alarm prompt.

Optionally, the sensor includes any one of a methane sensor, a carbon monoxide sensor, a wind speed sensor, a temperature sensor and a humidity sensor.

The invention also provides a fault diagnosis method for the sensor of the thermal power plant, which comprises the following operation steps:

s1: setting the preset value and the parameter range value of the sensor through the input module;

s2: the sensor module collects the parameter signal of the sensor;

s3: the converter module converts the parameter signal of the sensor into the standard electric signal;

s4: the A/D converter module converts the standard electric signal into the digital signal;

s5: the detection fault judgment module judges whether the sensor has a fault according to the digital signal;

s6: when the digital signal has no fault, the difference value comparison module calculates the absolute value of the difference between the digital signal and the preset value and compares the absolute value with the parameter range value;

s7: when the digital signal has a fault, the fault type matching module carries out fault matching identification; when the absolute value is larger than the parameter range value, the fault type matching module carries out fault matching identification;

s8: when the sensor diagnoses a fault, the display module displays the fault category, and the alarm module sends out an alarm prompt.

Optionally, the display module is a touch display screen.

Optionally, the alarm module includes a buzzer.

The invention provides a device and a method for diagnosing faults of a sensor of a thermal power plant, which have the beneficial effects that: whether the sensor has faults is judged through the detection fault judging module, when the sensor does not have faults, the absolute value of the difference between the digital signal and the preset value is calculated through the difference value comparing module, the absolute value is compared with the parameter range value, when the absolute value is larger than the parameter range value, the sensor has faults, when the absolute value is smaller than the parameter range value, the sensor does not have faults, whether other faults exist in the sensor is judged, the accuracy and the precision of fault diagnosis of the sensor are improved, and potential safety hazards caused by inaccurate judgment are prevented;

furthermore, whether the sensor has a fault is judged through the fault detection and judgment module, and when the sensor has the fault, the fault type matching module carries out fault matching and identification so as to prevent potential safety hazards.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.

Fig. 1 shows a schematic diagram of a thermal power plant sensor fault diagnosis apparatus according to an embodiment of the present invention.

FIG. 2 is a flow chart illustrating a method for diagnosing a fault in a sensor of a thermal power plant according to an embodiment of the present invention.

Description of reference numerals:

1. a sensor acquisition module; 2. a fault determination module; 3. a fault alarm module; 4. a sensor module; 5. a converter module; 6. an A/D converter module; 7. a detection fault judgment module; 8. a fault type matching module; 9. a difference comparison module; 10. an input module; 11. a display module; 12. and an alarm module.

Detailed Description

Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In order to achieve the above object, a sensor failure diagnosis apparatus of a thermal power plant includes:

the sensor acquisition module is used for acquiring parameter signals of the sensor and outputting the parameter signals;

the input end of the fault judgment module is electrically connected with the output end of the sensor acquisition module, and the fault judgment module judges whether the parameter signal has a fault or not and whether the numerical value of the parameter signal is within a preset range or not;

and the input end of the fault alarm module is electrically connected with the output end of the fault judgment module, and the fault alarm module displays the fault category and sends out an alarm prompt.

Specifically, the sensor acquisition module acquires parameter signals of the sensor and transmits the parameter signals to the fault determination module, the fault determination module determines whether a fault occurs according to the parameter signals, and the fault alarm module displays fault categories and sends an alarm prompt according to the signals transmitted by the fault determination module.

Optionally, the sensor acquisition module includes:

the sensor module is used for acquiring sensor parameter signals;

the input end of the converter module is electrically connected with the output end of the sensor module, and the converter module converts the acquired parameter signals into standard electric signals;

and the input end of the A/D converter module is electrically connected with the output end of the converter module, and the A/D converter module converts the standard electric signal into the converter module which converts the standard electric signal into a digital signal.

Specifically, the sensor module is used for collecting parameter signals of the sensor, the converter module converts the parameter signals into standard electric signals, and the A/D converter module converts the standard electric signals into digital signals, so that diagnosis of the sensor is facilitated.

Optionally, the fault determining module includes:

and the input end of the detection fault judgment module is electrically connected with the output end of the A/D converter module, and the detection fault judgment module judges whether the sensor has faults or not according to the digital signals.

Specifically, the detection and fault judgment module judges whether the sensor has faults (such as open circuit, short circuit and short circuit with the ground) according to the digital signals.

Optionally, the fault determining module further includes:

the input module is used for setting the preset value and the parameter range value of the sensor;

and the input end of the difference comparison module is respectively and electrically connected with the output ends of the detection fault judgment module and the input module, when the detection fault judgment module judges that the digital signal has no fault, the digital signal is transmitted to the difference comparison module, and the difference comparison module calculates the absolute value of the difference between the digital signal and a preset value and compares the absolute value with the parameter range value.

Specifically, the input module sets a preset value and a parameter range value of a normal sensor, and transmits the preset value and the parameter range value to the difference comparison module, when the sensor has no fault, the difference comparison module calculates an absolute value of a difference between the digital signal and the preset value, and compares the absolute value with the parameter range value, when the absolute value is greater than the parameter range value, the sensor has a fault, and when the absolute value is less than the parameter range value, the sensor has no fault.

Optionally, the fault determining module further includes:

the input end of the fault type matching module is respectively and electrically connected with the output ends of the fault detection and judgment module and the difference value comparison module, when the fault detection and judgment module judges that the digital signal has a fault, the digital signal is transmitted to the fault type matching module, the fault type matching module carries out fault matching identification, when the digital signal has no fault, the difference value comparison module transmits a result of comparing an absolute value with a parameter range value to the fault type matching module, and the fault type matching module carries out fault matching identification.

Specifically, when the fault detection and judgment module judges that the digital signal has a fault, the fault type matching module performs fault matching identification, and when the absolute value is greater than the parameter range value, the fault type matching module performs fault matching identification.

Optionally, the fault alarm module includes:

the input end of the display module is electrically connected with the output end of the fault type matching module, and the display module is used for displaying the fault type of the sensor;

and the input end of the alarm module is electrically connected with the output end of the fault type matching module, and the alarm module is used for sending an alarm prompt.

Specifically, when the sensor has a fault, the display module displays the fault category, and the alarm module sends out an alarm prompt.

Optionally, the sensor includes any one of a methane sensor, a carbon monoxide sensor, a wind speed sensor, a temperature sensor, and a humidity sensor.

Specifically, the sensor fault diagnosis device for the thermal power plant can diagnose faults of any one of a methane sensor, a carbon monoxide sensor, an air speed sensor, a temperature sensor and a humidity sensor.

The invention also provides a fault diagnosis method for the sensor of the thermal power plant, which comprises the following operation steps:

s1: setting preset values and parameter range values of the sensor through an input module;

s2: the sensor module collects parameter signals of the sensor;

s3: the converter module converts the parameter signal of the sensor into a standard electric signal;

s4: the A/D converter module converts the standard electric signal into a digital signal;

s5: the detection fault judgment module judges whether the sensor has a fault according to the digital signal;

s6: when the digital signal has no fault, the difference value comparison module calculates the absolute value of the difference between the digital signal and a preset value and compares the absolute value with a parameter range value;

s7: when the digital signal has a fault, the fault type matching module carries out fault matching identification; when the absolute value is larger than the parameter range value, the fault type matching module carries out fault matching identification;

s8: when the sensor diagnoses a fault, the display module displays the fault category, and the alarm module gives an alarm prompt.

Specifically, whether the sensor has a fault is judged through the detection fault judging module, when the sensor does not have the fault, the absolute value of the difference between the digital signal and the preset value is calculated through the difference value comparing module, the absolute value is compared with the parameter range value, whether other faults exist in the sensor is judged, the accuracy and the precision of fault diagnosis of the sensor are improved, and potential safety hazards caused by inaccurate judgment are prevented.

Optionally, the display module is a touch display screen.

In particular, it is convenient to display the failure of the sensor diagnosis.

Optionally, the alarm module includes a buzzer.

Specifically, staff is convenient to remind that the sensor breaks down.

Examples

Referring to fig. 1 and 2, the present invention provides a thermal power plant sensor failure diagnosis apparatus including:

the sensor acquisition module 1 is used for acquiring parameter signals of the sensor and outputting the parameter signals;

the input end of the fault judgment module 2 is electrically connected with the output end of the sensor acquisition module 1, and the fault judgment module 2 judges whether the parameter signal has a fault and whether the value of the parameter signal is within a preset range;

and the input end of the fault alarm module 3 is electrically connected with the output end of the fault judgment module 2, and the fault alarm module 3 displays the fault category and sends out an alarm prompt.

In this embodiment, the sensor acquisition module 1 includes:

the sensor module 4 is used for acquiring sensor parameter signals;

the input end of the converter module 5 is electrically connected with the output end of the sensor module 4, and the converter module 5 converts the acquired parameter signals into standard electric signals;

and the input end of the A/D converter module 6 is electrically connected with the output end of the converter module 5, and the A/D converter module 6 converts the standard electric signal into a digital signal.

In this embodiment, the failure determination module 2 includes:

and the detection fault judgment module 7 is used for electrically connecting the input end of the detection fault judgment module 7 with the output end of the A/D converter module 6, and the detection fault judgment module 7 judges whether the sensor has faults or not according to the digital signals.

In this embodiment, the failure determination module 2 further includes:

the input module 10 is used for setting a preset value and a parameter range value of the sensor through the input module 10;

and the input end of the difference comparison module 9 is respectively and electrically connected with the output ends of the detection fault judgment module 7 and the input module 10, when the detection fault judgment module 7 judges that the digital signal has no fault, the digital signal is transmitted to the difference comparison module 9, and the difference comparison module 9 calculates the absolute value of the difference between the digital signal and the preset value and compares the absolute value with the parameter range value.

In this embodiment, the failure determination module 2 further includes:

the input end of the fault type matching module 8 is respectively and electrically connected with the output ends of the fault detection and judgment module 7 and the difference value comparison module 9, when the fault detection and judgment module 7 judges that the digital signal has a fault, the digital signal is transmitted to the fault type matching module 8, the fault type matching module 8 carries out fault matching identification, when the digital signal has no fault, the difference value comparison module 9 transmits a result of comparing an absolute value with a parameter range value to the fault type matching module 8, and the fault type matching module 8 carries out fault matching identification.

In this embodiment, the fault alarm module 3 includes:

the input end of the display module 11 is electrically connected with the output end of the fault type matching module 8, and the display module 11 is used for displaying the fault type of the sensor;

and the input end of the alarm module 12 is electrically connected with the output end of the fault type matching module 8, and the alarm module 12 is used for giving an alarm prompt.

In this embodiment, the sensor includes any one of a methane sensor, a carbon monoxide sensor, a wind speed sensor, a temperature sensor, and a humidity sensor.

The invention also provides a fault diagnosis method for the sensor of the thermal power plant, which comprises the following operation steps:

s1: the preset value and the parameter range value of the sensor are set through the input module 10;

s2: the sensor module 4 collects parameter signals of the sensor;

s3: the converter module 5 converts the parameter signal of the sensor into a standard electric signal;

s4: the A/D converter module 6 converts the standard electric signal into a digital signal;

s5: the detection fault judgment module 7 judges whether the sensor has a fault according to the digital signal;

s6: when the digital signal has no fault, the difference value comparison module 9 calculates the absolute value of the difference between the digital signal and the preset value and compares the absolute value with the parameter range value;

s7: when the digital signal has faults, the fault type matching module 8 carries out fault matching identification; when the absolute value is larger than the parameter range value, the fault type matching module 8 carries out fault matching identification;

s8: when the sensor diagnoses a fault, the display module 11 displays the fault category, and the alarm module 12 gives an alarm prompt.

In this embodiment, the display module is a touch display screen.

In this embodiment, the alarm module includes a buzzer.

In summary, the fault detection and judgment module 7 is used for judging whether the sensor has a fault, when the sensor does not have the fault, the difference comparison module 9 is used for calculating the absolute value of the difference between the digital signal and the preset value, and comparing the absolute value with the parameter range value, when the absolute value is larger than the parameter range value, the sensor has the fault, and when the absolute value is smaller than the parameter range value, the sensor does not have the fault, and whether the sensor has other faults or not is judged, so that the accuracy and the accuracy of fault diagnosis of the sensor are improved, and potential safety hazards caused by inaccurate judgment are prevented.

Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.