CN113092940A - Fault detection method of power transmission line icing monitoring device - Google Patents
Fault detection method of power transmission line icing monitoring device Download PDFInfo
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- CN113092940A CN113092940A CN202110377909.9A CN202110377909A CN113092940A CN 113092940 A CN113092940 A CN 113092940A CN 202110377909 A CN202110377909 A CN 202110377909A CN 113092940 A CN113092940 A CN 113092940A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The application relates to a fault detection method of an ice coating monitoring device of a power transmission line, which comprises the following steps: acquiring a standard signal and a reference signal of each target detection unit in the power transmission line icing monitoring device, wherein the standard signal is a signal input value when the target detection unit normally works, and the reference signal is a signal output value when the target detection unit normally works; applying an input signal consistent with a standard signal to a target detection unit of the ice coating monitoring device of the power transmission line in abnormal working; measuring an output signal of a target detection unit of the power transmission line icing monitoring device during abnormal work; and traversing each target detection unit in the power transmission line icing monitoring device, comparing the output signal with the reference signal, and judging the fault type of the power transmission line icing monitoring device when the power transmission line icing monitoring device works abnormally. By applying the fault detection method, the type and the position of the fault of the ice coating monitoring device of the power transmission line can be detected and determined quickly and accurately.
Description
Technical Field
The application relates to the technical field of power transmission line icing monitoring devices, in particular to a fault detection method of a power transmission line icing monitoring device.
Background
The development of the on-line monitoring technology of the power transmission line has important significance on the safe operation of the power transmission line and the stability of a power grid system, and can enable power maintenance support personnel to quickly find and determine the existence of potential safety hazards of the power transmission line or the position of a fault, and eliminate the potential safety hazards or maintain the power transmission line in the shortest time.
At present, one of the on-line monitoring technologies for power transmission lines is a method for monitoring icing on the power transmission lines, which comprises the following steps: the device mainly comprises a tension sensor module, a signal transmission module and a data terminal module. Research shows that the transmission line icing monitoring device is inevitably broken and damaged in the using process due to the fault of the tension sensor module, such as: the tension sensor module is subjected to mechanical deformation after being loaded, and after the load is removed, the tension sensor module cannot be recovered, so that the transmission line icing monitoring device fails, and therefore the transmission line icing monitoring device needs to be subjected to fault detection, and fault reasons and fault problems are analyzed.
When the conventional method is used for fault detection of the ice coating monitoring device of the power transmission line, generally, fault detection is only performed on a tension sensor module in the ice coating monitoring device of the power transmission line, and some simple tension sensor module fault troubleshooting methods are generally adopted, such as: the obvious reading of the device is inaccurate, and whether the mechanical structure (such as a sealing ring and a transducer) of the tension sensor module has a problem is judged; the following steps are repeated: the device indication changes greatly, and the judgment is probably caused by the influence of vibration and other interference factors on the tension sensor module. However, when the ice monitoring device for the power transmission line fails, not only the tension sensor module but also the signal transmission module and the data terminal module fail, that is, any one of the constituent units of the whole device fails, and the fault detection method adopted in the conventional method can only detect the faults of the tension sensor module and cannot detect the faults of the constituent units of the ice monitoring device for the power transmission line, so that the more rapid and accurate fault detection cannot be performed.
Disclosure of Invention
The application provides a fault detection method of an ice coating monitoring device of a power transmission line, which aims to solve the problems that the traditional fault detection method can only detect faults of a tension sensor module in the device and cannot detect the faults of all constituent units of the ice coating monitoring device of the power transmission line.
In order to solve the above problems, the present application provides the following technical solutions:
a fault detection method of an icing monitoring device of a power transmission line comprises the following steps:
acquiring a standard signal and a reference signal of each target detection unit in the power transmission line icing monitoring device, wherein the standard signal is a signal input value when the target detection unit normally works, and the reference signal is a signal output value when the target detection unit normally works;
applying an input signal to a target detection unit of the ice coating monitoring device of the power transmission line in abnormal working, wherein the input signal is consistent with the standard signal;
measuring an output signal of a target detection unit of the power transmission line icing monitoring device during abnormal working;
and traversing each target detection unit in the power transmission line icing monitoring device, comparing the output signal with the reference signal, and judging the fault type of the power transmission line icing monitoring device in abnormal working.
Wherein the fault types include data terminal faults, signal transmission faults, software/hardware circuit faults, elastomer faults and resistance strain gauge faults.
Further, the step of detecting the data terminal fault is:
acquiring a first standard signal and a first reference signal of a data terminal module in the power transmission line icing monitoring device, wherein the first standard signal is a signal input value when the data terminal module normally works, and the first reference signal is a signal output value when the data terminal module normally works;
applying a first electrical signal to the data terminal module, the applied first electrical signal being in accordance with the first standard signal;
measuring a first output electrical signal of the data terminal module;
and if the first output electric signal is inconsistent with the first reference signal, judging that the data terminal module has a fault.
Further, the step of detecting the signal transmission failure is:
acquiring a second standard signal and a second reference signal of a signal transmission module in the power transmission line icing monitoring device, wherein the second standard signal is a signal input value when the signal transmission module normally works, and the second reference signal is a signal output value when the signal transmission module normally works;
applying a second electrical signal to the signal transmission module, the applied second electrical signal being in accordance with the second standard signal;
measuring a second output electrical signal of the signal transmission module;
and if the second output electric signal is inconsistent with the second reference signal, judging that the signal transmission module has a fault.
Further, the step of detecting the software/hardware circuit fault is:
acquiring a third standard signal and a third reference signal of a software/hardware circuit in the ice coating monitoring device of the power transmission line, wherein the third standard signal is a resistance value of a resistance strain gauge when the resistance strain gauge works normally, and the third reference signal is a signal output value of the software/hardware circuit when the software/hardware circuit works normally;
applying a load to the power transmission line icing monitoring device, measuring a real-time resistance value of the resistance strain gauge, and stopping applying the load when the real-time resistance value is consistent with the third standard signal;
measuring a third output electrical signal of the software/hardware circuit;
and if the third output electric signal is inconsistent with the third reference signal, judging that the software/hardware circuit has a fault.
Further, the step of detecting the elastomer failure is:
acquiring a fourth standard signal and a fourth reference signal of an elastic body in the ice coating monitoring device of the power transmission line, wherein the fourth standard signal is a load borne by the elastic body when the elastic body normally works, and the fourth reference signal is a deformation quantity of the elastic body when the elastic body normally works;
applying a load to the elastic body while measuring a deformation amount of the elastic body, the applied load being in accordance with the fourth standard signal;
and if the deformation quantity is inconsistent with the fourth reference signal, judging that the elastic body has a fault.
Further, the step of detecting the fault of the first resistance strain gauge is as follows:
acquiring a fifth standard signal and a fifth reference signal of a resistance strain gauge in the ice coating monitoring device of the power transmission line, wherein the fifth standard signal is a deformation quantity of the resistance strain gauge during normal working, and the fifth reference signal is a resistance value of the resistance strain gauge during normal working;
applying a load to the power transmission line icing monitoring device, measuring the real-time deformation of the resistance strain gauge, and stopping applying the load when the real-time deformation is consistent with the fifth standard signal;
measuring the resistance value of the resistance strain gauge;
and if the resistance value is inconsistent with the fifth reference signal, judging that the first type of resistance strain gauge fault occurs in the resistance strain gauge.
Further, the step of detecting the fault of the second resistance strain gauge is as follows:
acquiring a fourth reference signal of an elastic body and a fifth reference signal of a resistance strain gauge in the ice coating monitoring device of the power transmission line, wherein the fourth reference signal is a deformation amount of the elastic body when the elastic body works normally, and the fifth reference signal is a resistance value of the resistance strain gauge when the resistance strain gauge works normally;
applying a load to the power transmission line icing monitoring device, measuring the deformation amount of the elastic body at the same time, and stopping applying the load when the deformation amount is consistent with the fourth reference signal;
measuring the resistance value of the resistance strain gauge;
and if the resistance value is inconsistent with the fifth reference signal, judging that the second type of resistance strain gauge fault occurs in the resistance strain gauge.
The technical scheme provided by the application comprises the following beneficial technical effects:
in the application, input signals of all the components of the ice coating monitoring device of the power transmission line are obtained as standard signals when the ice coating monitoring device works normally, and output signals are used as reference signals; and inputting signals to each unit of the faulty transmission line icing monitoring device one by one, wherein the input signals are consistent with the corresponding standard signals, measuring the output signals of the corresponding signal output ends, comparing the measured output signals with the corresponding reference signals, if the output signals are consistent with the corresponding reference signals, judging that the unit is not faulty, and otherwise, carrying out fault detection on other units. Therefore, the type and the position of the fault of the ice coating monitoring device of the power transmission line can be detected and determined quickly and accurately.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a transmission line icing monitoring device;
FIG. 2 shows a typical failure of the transmission line icing monitoring device and the cause of the failure;
FIG. 3 illustrates the fault types and classifications of the transmission line icing monitoring device;
fig. 4 is a fault detection method of the transmission line icing monitoring device.
Detailed Description
In order to make the technical solutions in the present application better understood by those skilled in the art, 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; it is to be understood that the embodiments described are only a few embodiments of the present application and 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.
The power transmission line icing monitoring device has important significance in ensuring the safe operation of the power transmission line and the stable work of a power grid system. Fig. 1 is a schematic diagram of a power transmission line icing monitoring device, and the power transmission line icing monitoring device shown in fig. 1 includes a tension sensor module, a signal transmission module and a data terminal module, wherein the tension sensor module includes an elastic body, a resistance strain gauge and a software/hardware circuit.
When the device for monitoring the icing of the power transmission line is used for detecting faults, a known standard signal is input into a component unit which is likely to have faults, then an output signal of the unit is measured, the measured output signal is compared with a reference signal, and whether the unit has the faults or not is judged, wherein the standard signal refers to a signal input value when the component unit normally works, and the reference signal refers to a signal output value when the component unit normally works. When the ice coating monitoring device of the power transmission line is subjected to fault detection, the fault type and fault classification which can occur to the power transmission line need to be known firstly.
Typical faults of the power transmission line ice coating monitoring device are shown in fig. 2 and comprise an elastomer fault, a resistance strain gauge fault, a software/hardware circuit fault, a signal transmission fault and a data terminal fault, wherein the resistance strain gauge fault is divided into a first resistance strain gauge fault and a second resistance strain gauge fault.
Elastomer failure is a mechanical failure due to out-of-range or under alternating loading, typically due to deformation of the elastomer structure caused by excessive mechanical loading.
The resistance strain gauge is adhered to the elastic body, so that the problems of the resistance strain gauge that the measuring range is over-limited or the structure is deformed due to the action of alternating load force and the like exist, and the relatively accurate resistance value change cannot be generated, so that the first resistance strain gauge fails; the problem that the sticking effect of the resistance strain gauge is poor or the deformation is insufficient also exists, at the moment, the elastic body is deformed to a certain extent, the resistance strain gauge cannot be deformed correspondingly, and then the second type of resistance strain gauge faults occur.
The software/hardware circuit faults mainly refer to software circuit faults and hardware circuit faults, and the resistance value cannot be converted into an electric signal or the electric signal cannot be output when the faults occur.
The signal transmission fault is that the optical fiber cable has a fault, and the electric signal cannot be transmitted to a data terminal for data processing, mainly because the quality problem of the optical fiber cable or external force damages the optical fiber cable.
The data terminal failure refers to the problem that data is transmitted to the data terminal, but the data terminal cannot process the data or the obtained tension value is inaccurate, and the problems are caused by loss and confusion of collected data or calculation errors of a data processing module.
Fig. 3 is a classification of the above various faults, which can be classified into two cases, signal fault and no-signal fault.
What transmission line icing monitoring devices produced when having signal fault to take place is the inaccurate signal, and the production reason of inaccurate signal has: the generation of the inaccurate signal may occur in any one of the constituent units of the ice monitoring device for the power transmission line.
The no-signal fault can be divided into a data terminal front fault and a data terminal fault, and the data terminal front fault comprises: elastomer faults, resistance strain gage faults, software/hardware circuit faults, and signal transmission faults, i.e., pre-data termination faults may occur at any one of the constituent units in front of the data termination module.
Any fault can cause the ice coating monitoring device of the power transmission line to work normally, and further the power transmission line cannot be monitored. Therefore, when the ice coating monitoring device of the power transmission line fails, the failed device needs to be quickly and accurately detected, and the position of the failed device needs to be accurately judged, so that the parts can be replaced or maintained.
Before fault detection is carried out on the power transmission line icing monitoring device, a reference signal needs to be acquired. The reference signal is obtained by measuring the output voltage value or the deformation quantity of each component unit of the power transmission line icing monitoring device under the condition that a standard signal is applied to any component unit of the power transmission line icing monitoring device which can normally work, and the measured voltage value or the measured deformation quantity is the reference signal. The standard signal refers to a preset voltage value or a preset tensile load applied to a signal input end of any component unit of the ice coating detection device of the power transmission line when the component unit can normally work, and the preset voltage value or the preset tensile load is within the range of the minimum value and the maximum value of the signal input value of each component unit.
Fig. 4 shows a specific detection method for the above five types of faults, and a digital multimeter is selected for measuring the voltage value and the resistance value, and a micrometer is selected for measuring the deformation quantity.
The detection of the data terminal fault comprises the following steps:
applying a voltage with a known voltage value to a data terminal module in normal work, and then measuring the voltage value of a signal output end of the data terminal module, wherein the applied known voltage value is used as a first standard signal, and the measured voltage value is used as a first reference signal;
applying voltage to a signal input end of a data terminal module serving as a fault detection unit, wherein the voltage value of the applied voltage is consistent with the first standard signal, and measuring the voltage value of a signal output end of the data terminal module;
if the measured output voltage value is inconsistent with the first reference signal, it can be determined that the data terminal module has a fault.
The detection of the signal transmission fault comprises the following steps:
applying a voltage with a known voltage value to the signal transmission module during normal work, and then measuring the voltage value of the signal output end of the signal transmission module, wherein the applied known voltage value is used as a second standard signal, and the measured voltage value is used as a second reference signal;
applying voltage to a signal input end of a signal transmission module serving as a fault detection unit, wherein the voltage value of the applied voltage is consistent with the second standard signal, and measuring the voltage value of a signal output end of the signal transmission module;
if the measured output voltage value is inconsistent with the second reference signal, it can be determined that the data terminal module has a fault.
The detection of the software/hardware circuit failure comprises the following steps:
applying a load with a known tension value to the tension sensor module in normal work, then measuring the resistance value of the resistance strain gauge and the output voltage value of the software/hardware circuit, wherein the measured resistance value is used as a third standard signal, and the measured voltage value is used as a third reference signal;
when the software/hardware circuit is used as a fault detection unit, applying a load to the tension sensor module, and simultaneously measuring the real-time resistance value of the resistance strain gauge, and when the measured real-time resistance value is consistent with a third standard signal, stopping applying the load, and then measuring the voltage value of the signal output end of the software/hardware circuit;
if the measured output voltage value is inconsistent with the third reference signal, it can be determined that the software/hardware circuit is faulty.
The detection of elastomer failure comprises the following steps:
applying a load with a known tension value to the tension sensor module in normal work, measuring the deformation of the elastic body, taking the applied load as a fourth standard signal, and taking the measured deformation as a fourth reference signal;
when the elastic body is used as a fault detection unit, applying a load to the tension sensor module, wherein the applied load is consistent with the fourth standard signal, and then measuring the deformation amount of the elastic body;
if the measured deformation amount is not consistent with the fourth reference signal, the elastic body is judged to be in fault.
The first resistance strain gauge fault detection method comprises the following steps:
applying a load with a known tension value to the tension sensor module in normal work, measuring the deformation and the resistance of the resistance strain gauge, wherein the measured deformation is used as a fifth standard signal, and the measured resistance is used as a fifth reference signal;
when the resistance strain gauge is used as a fault detection unit, applying a load to the tension sensor module, measuring the real-time deformation quantity of the resistance strain gauge, stopping applying the load when the measured real-time deformation quantity is consistent with the fifth standard signal, and then measuring the resistance value of the resistance strain gauge;
if the measured resistance value is not consistent with the fifth reference signal, the resistance strain gauge is judged to be in fault.
The second type of resistance strain gauge fault detection steps are as follows:
applying a load with a known tension value to the tension sensor module in normal work, measuring the deformation quantity of the elastic body, measuring the resistance value of the resistance strain gauge, wherein the measured deformation quantity is used as a fourth reference signal, and the measured resistance value is used as a fifth reference signal;
when the resistance strain gauge is used as a fault detection unit, applying a load to the tension sensor module, measuring the deformation quantity of the elastic body, stopping applying the load when the measured deformation quantity is consistent with a fourth reference signal, and measuring the resistance value of the resistance strain gauge;
if the measured resistance value is not consistent with the fifth reference signal, the resistance strain gauge is judged to be in fault.
By using the fault detection method, the fault type and the fault unit of the power transmission line icing monitoring device can be judged when the power transmission line icing monitoring device fails.
It is noted that relational terms such as "first" and "second," and the like, may be 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 an 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.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It will be understood that the present application is not limited to what has been described above and shown in the accompanying drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (8)
1. A fault detection method of an icing monitoring device of a power transmission line is characterized by comprising the following steps:
acquiring a standard signal and a reference signal of each target detection unit in the power transmission line icing monitoring device, wherein the standard signal is a signal input value when the target detection unit normally works, and the reference signal is a signal output value when the target detection unit normally works;
applying an input signal to a target detection unit of the ice coating monitoring device of the power transmission line in abnormal working, wherein the input signal is consistent with the standard signal;
measuring an output signal of a target detection unit of the power transmission line icing monitoring device during abnormal working;
and traversing each target detection unit in the power transmission line icing monitoring device, comparing the output signal with the reference signal, and judging the fault type of the power transmission line icing monitoring device in abnormal working.
2. The method of claim 1, wherein the fault types include data terminal faults, signal transmission faults, software/hardware circuit faults, elastomer faults, first type of resistance strain gauge faults, and second type of resistance strain gauge faults.
3. The method for detecting the fault of the device for monitoring the icing on the power transmission line according to claim 2, wherein the step of detecting the fault of the data terminal comprises the following steps:
acquiring a first standard signal and a first reference signal of a data terminal module in the power transmission line icing monitoring device, wherein the first standard signal is a signal input value when the data terminal module normally works, and the first reference signal is a signal output value when the data terminal module normally works;
applying a first electrical signal to the data terminal module, the applied first electrical signal being in accordance with the first standard signal;
measuring a first output electrical signal of the data terminal module;
and if the first output electric signal is inconsistent with the first reference signal, judging that the data terminal module has a fault.
4. The method for detecting the fault of the device for monitoring the icing on the power transmission line according to claim 2, wherein the step of detecting the signal transmission fault is as follows:
acquiring a second standard signal and a second reference signal of a signal transmission module in the power transmission line icing monitoring device, wherein the second standard signal is a signal input value when the signal transmission module normally works, and the second reference signal is a signal output value when the signal transmission module normally works;
applying a second electrical signal to the signal transmission module, the applied second electrical signal being in accordance with the second standard signal;
measuring a second output electrical signal of the signal transmission module;
and if the second output electric signal is inconsistent with the second reference signal, judging that the signal transmission module has a fault.
5. The method for detecting the fault of the device for monitoring the icing on the power transmission line according to claim 2, wherein the step of detecting the fault of the software/hardware circuit comprises the following steps:
acquiring a third standard signal and a third reference signal of a software/hardware circuit in the ice coating monitoring device of the power transmission line, wherein the third standard signal is a resistance value of a resistance strain gauge when the resistance strain gauge works normally, and the third reference signal is a signal output value of the software/hardware circuit when the software/hardware circuit works normally;
applying a load to the power transmission line icing monitoring device, measuring a real-time resistance value of the resistance strain gauge, and stopping applying the load when the real-time resistance value is consistent with the third standard signal;
measuring a third output electrical signal of the software/hardware circuit;
and if the third output electric signal is inconsistent with the third reference signal, judging that the software/hardware circuit has a fault.
6. The method for detecting the fault of the device for monitoring the icing on the power transmission line according to claim 2, wherein the step of detecting the fault of the elastic body is as follows:
acquiring a fourth standard signal and a fourth reference signal of an elastic body in the ice coating monitoring device of the power transmission line, wherein the fourth standard signal is a load borne by the elastic body when the elastic body normally works, and the fourth reference signal is a deformation quantity of the elastic body when the elastic body normally works;
applying a load to the elastic body while measuring a deformation amount of the elastic body, the applied load being in accordance with the fourth standard signal;
and if the deformation quantity is inconsistent with the fourth reference signal, judging that the elastic body has a fault.
7. The method for detecting the fault of the device for monitoring the icing on the power transmission line according to claim 2, wherein the step of detecting the fault of the first resistance strain gauge comprises the following steps:
acquiring a fifth standard signal and a fifth reference signal of a resistance strain gauge in the ice coating monitoring device of the power transmission line, wherein the fifth standard signal is a deformation quantity of the resistance strain gauge during normal working, and the fifth reference signal is a resistance value of the resistance strain gauge during normal working;
applying a load to the power transmission line icing monitoring device, measuring the real-time deformation of the resistance strain gauge, and stopping applying the load when the real-time deformation is consistent with the fifth standard signal;
measuring the resistance value of the resistance strain gauge;
and if the resistance value is inconsistent with the fifth reference signal, judging that the first type of resistance strain gauge fault occurs in the resistance strain gauge.
8. The method for detecting the fault of the device for monitoring the icing on the power transmission line according to claim 2, wherein the step of detecting the fault of the second resistance strain gauge comprises the following steps:
acquiring a fourth reference signal of an elastic body and a fifth reference signal of a resistance strain gauge in the ice coating monitoring device of the power transmission line, wherein the fourth reference signal is a deformation amount of the elastic body when the elastic body works normally, and the fifth reference signal is a resistance value of the resistance strain gauge when the resistance strain gauge works normally;
applying a load to the transmission line icing monitoring device, measuring the deformation quantity of the elastic body at the same time, and stopping applying the load when the deformation quantity is consistent with the fourth reference signal;
measuring the resistance value of the resistance strain gauge;
and if the resistance value is inconsistent with the fifth reference signal, judging that the second type of resistance strain gauge fault occurs in the resistance strain gauge.
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Application publication date: 20210709 |