Fault diagnosis system and method for measuring device

Abstract

The invention provides a fault diagnosis system and method for a measuring device. The system comprises a plurality of diagnosis devices and a control module, each diagnosis device is used for carrying out fault diagnosis on a to-be-detected measuring device to obtain a first diagnosis signal, and obtaining a second fault diagnosis signal obtained by carrying out fault diagnosis on the measuring device by other diagnosis devices; obtaining diagnosis voting information according to the first diagnosis signal and the second diagnosis signal; the control module is used for acquiring diagnosis voting information of each diagnosis device; and determining a fault diagnosis result of the measuring device according to the diagnosis voting information of each diagnosis device. By applying the system provided by the embodiment of the invention, fault diagnosis can be efficiently and accurately carried out on the measuring device.

Description

Technical Field

[0001] The present application relates to the technical field of measuring device diagnosis, and in particular to a fault diagnosis system and method for a measuring device. Background Art

[0002] In modern industrial production, field measurement devices such as sensors are key components to ensure smooth production processes, improve efficiency, control costs and ensure safety. These devices usually have the advantages of simple structure, convenient operation, high accuracy and fast response, thus becoming an important tool to meet the needs of industrial system parameter detection.

[0003] However, due to aging or damage of the equipment itself, connection problems or external environmental factors, disconnection of field devices has become a common challenge, which not only affects the accuracy of data but may also cause more serious safety risks. Summary of the invention

[0004] The technical problem to be solved by this application is to provide a fault diagnosis system and method for a measuring device, which can efficiently and accurately diagnose faults of the measuring device. The specific scheme is as follows:

[0005] A fault diagnosis system for a measuring device, comprising:

[0006] multiple diagnostic devices and control modules;

[0007] Each of the diagnostic devices is used to perform fault diagnosis on the measuring device to be detected, obtain a first diagnostic signal, and obtain a second fault diagnosis signal obtained by other diagnostic devices performing fault diagnosis on the measuring device; obtain diagnostic voting information according to the first diagnostic signal and the second diagnostic signal;

[0008] The control module is used to obtain the diagnostic voting information of each of the diagnostic devices; and determine the fault diagnosis result of the measuring device according to the diagnostic voting information of each of the diagnostic devices.

[0009] The above system may optionally further include: an interaction device;

[0010] The diagnostic device is further configured to send the first diagnostic signal to the interactive device, so that the interactive device sends the first diagnostic signal to other diagnostic devices.

[0011] In the above system, optionally, the interaction device comprises: a plurality of interaction modules; any two of the diagnostic devices are connected via one of the interaction modules;

[0012] Each of the diagnostic devices is used to send the first diagnostic signal to the interactive module connected to the diagnostic device, so as to be transmitted to other diagnostic devices by the interactive module connected to the diagnostic device.

[0013] In the above system, optionally, the diagnostic device is used to:

[0014] Voting according to the fault diagnosis type represented by the first diagnostic signal and the fault diagnosis type represented by each of the second diagnostic signals to obtain a first voting result of the measuring device;

[0015] Diagnostic voting information is obtained according to the first voting result.

[0016] In the above system, optionally, the control module is used to:

[0017] When the diagnosis voting information of each of the diagnosis devices is the same, the diagnosis voting information is determined as the fault diagnosis result of the measurement device.

[0018] In the above system, optionally, the control module is further used for:

[0019] When the diagnosis voting information of each of the diagnosis devices is different, an alarm message of system abnormality is output.

[0020] In the above system, optionally, the control module is used to:

[0021] Voting according to the diagnostic voting information of each of the diagnostic devices to obtain a second voting result;

[0022] A fault diagnosis result of the measuring device is determined according to the second voting result.

[0023] The above system may optionally further include: a synchronization module;

[0024] The synchronization module is used to send an output clock signal to each of the fault diagnosis devices.

[0025] In the above system, optionally, the fault diagnosis device includes an excitation source.

[0026] A fault diagnosis method for a measuring device is applied to a control module in a fault diagnosis system of the measuring device, wherein the fault diagnosis system of the measuring device further comprises a plurality of diagnostic devices, and the method comprises:

[0027] Acquire diagnostic voting information of each of the diagnostic devices; the diagnostic voting information of each of the diagnostic devices is determined based on a first diagnostic signal of the diagnostic device to be diagnosed by the diagnostic device and a second fault diagnostic signal of the measuring device by other diagnostic devices;

[0028] The fault diagnosis result of the measuring device is determined according to the diagnosis voting information of each of the diagnostic devices.

[0029] Based on the above-mentioned implementation of the present application, a fault diagnosis system and method for a measuring device is provided, the system includes: multiple diagnostic devices and a control module; each of the diagnostic devices is used to perform fault diagnosis on the measuring device to be detected, obtain a first diagnostic signal, and obtain a second fault diagnosis signal obtained by other diagnostic devices performing fault diagnosis on the measuring device; obtain diagnostic voting information according to the first diagnostic signal and the second diagnostic signal; the control module is used to obtain the diagnostic voting information of each of the diagnostic devices; determine the fault diagnosis result of the measuring device according to the diagnostic voting information of each of the diagnostic devices. Applying the method provided in the embodiment of the present application, it is possible to efficiently and accurately perform fault diagnosis on the measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0031] Figure 1 A schematic diagram of the structure of a fault diagnosis system for a measuring device provided in the present application;

[0032] Figure 2 A structural schematic diagram of a fault diagnosis system for another measuring device provided by the present application;

[0033] Figure 3 A schematic diagram of the structure of a fault diagnosis system for another measuring device provided in the present application;

[0034] Figure 4 A schematic diagram of the structure of a fault diagnosis system for another measuring device provided in the present application;

[0035] Figure 5 A diagnostic timing diagram based on time synchronization provided for this application;

[0036] Figure 6 A method flow chart of a fault diagnosis method for a measuring device provided in the present application. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0039] In modern industrial production, field measurement devices such as sensors are key components to ensure smooth production processes, improve efficiency, control costs and ensure safety. These devices usually have the advantages of simple structure, convenient operation, high accuracy and fast response, thus becoming an important tool to meet the needs of industrial system parameter detection.

[0040] However, due to aging or damage of the equipment itself, connection problems or external environmental factors, disconnection of field devices has become a common challenge, which not only affects the accuracy of data but may also cause more serious safety risks.

[0041] In one feasible approach, a closed loop consisting of a single excitation source and a measuring device can be used for fault detection. Specifically, the current signal generated by the excitation source is converted into a voltage signal after passing through the measuring device, and the voltage signal is used to determine whether there is a line break. Although this method can identify faults to a certain extent, it cannot effectively distinguish whether it is a problem with the measuring device itself or a fault in the excitation source, which leads to a high misdiagnosis rate, which in turn affects the reliability and safety of the entire system.

[0042] Based on this, see Figure 1 , is a schematic diagram of a structure of a fault diagnosis system for a measuring device provided in an embodiment of the present application, the system comprising:

[0043] A plurality of diagnostic devices 101 and a control module 102;

[0044] Each of the diagnostic devices 101 is used to perform fault diagnosis on the measuring device to be detected, obtain a first diagnostic signal, and obtain a second fault diagnosis signal obtained by other diagnostic devices performing fault diagnosis on the measuring device; and obtain diagnostic voting information according to the first diagnostic signal and the second diagnostic signal.

[0045] In this embodiment, the measuring device may be various types of sensor equipment, for example, a temperature sensor, a pressure sensor, a service sensor, a humidity sensor, a displacement sensor, a photoelectric sensor, a speed sensor, and the like.

[0046] In this embodiment, for each diagnostic device, diagnostic devices other than the diagnostic device in the system may be regarded as other diagnostic devices.

[0047] Optionally, the first diagnostic signal indicates whether there is a disconnection fault between the diagnostic device and the measuring device.

[0048] In this embodiment, the diagnostic device may include an excitation source, and each diagnostic device forms a detection loop with the measuring device. The diagnostic device can send a current test signal to the measuring device. After receiving the current test signal, the measuring device converts the current test signal into a voltage signal, and then sends the voltage signal to the diagnostic device. The diagnostic device analyzes the voltage signal to obtain a first diagnostic signal, and the first diagnostic signal indicates whether the detection loop is broken.

[0049] In some embodiments, when the voltage signal does not meet the preset expected voltage value, it is determined that the detection circuit has a broken wire fault, that is, the measuring device and the excitation source in the detection circuit may have a broken wire fault; when the voltage signal meets the preset expected voltage value, it is determined that the detection circuit does not have a broken wire fault.

[0050] Optionally, each diagnostic device may obtain diagnostic voting information based on a first diagnostic signal obtained by itself from diagnosing the measuring device and a second diagnostic signal obtained by other measuring devices from diagnosing the measuring device; the diagnostic voting information may characterize whether a line break fault occurs and the type of line break fault; the type of line break fault may include one of a measuring device line break fault and an excitation source line break fault.

[0051] In this embodiment, each diagnostic device can distinguish between an external measurement device disconnection fault and an internal excitation source disconnection fault by combining its own diagnostic signal and the diagnostic signal of other diagnostic devices. For example, if most diagnostic devices report the same fault mode, it can be confirmed that the problem is with the external measurement device; on the contrary, if only a few channels report a fault, it may be a problem with the internal excitation source.

[0052] The control module 102 is used to obtain the diagnostic voting information of each of the diagnostic devices; and determine the fault diagnosis result of the measuring device according to the diagnostic voting information of each of the diagnostic devices.

[0053] In this embodiment, the control module performs further comprehensive evaluation based on the voting information obtained from each diagnostic device. This may include checking whether there is contradictory information, verifying the consistency of the voting, etc. Based on the results of the comprehensive evaluation, the control module ultimately determines whether the measuring device has a fault and the specific type of fault. If the voting information of all or most diagnostic devices consistently points to a certain type of fault, the fault can be confirmed with high confidence.

[0054] In this embodiment, after confirming the fault and its type, the control module can generate a detailed fault report for reference by maintenance personnel. In some embodiments, according to the set rules, an alarm is automatically triggered or corresponding maintenance measures are suggested.

[0055] In the embodiments provided by the present application, each diagnostic device can perform fault diagnosis on the measuring device to be detected, obtain a first diagnostic signal, and obtain a second fault diagnosis signal obtained by other diagnostic devices performing fault diagnosis on the measuring device; obtain diagnostic voting information according to the first diagnostic signal and the second diagnostic signal; the control module obtains the diagnostic voting information of each of the diagnostic devices; and determines the fault diagnosis result of the measuring device according to the diagnostic voting information of each of the diagnostic devices. The system provided by the embodiments of the present application can efficiently and accurately perform fault diagnosis on the measuring device.

[0056] In an embodiment provided in the present application, based on the above solution, optionally, Figure 2 As shown, the system further includes: an interaction device 103;

[0057] The diagnostic device 103 is further configured to send the first diagnostic signal to an interactive device, so that the interactive device sends the first diagnostic signal to other diagnostic devices.

[0058] In an embodiment provided by the present application, based on the above solution, optionally, the interaction device 103 includes: a plurality of interaction modules; any two of the diagnostic devices are connected via one of the interaction modules;

[0059] Each of the diagnostic devices is used to send the first diagnostic signal to the interactive module connected to the diagnostic device, so as to be transmitted to other diagnostic devices by the interactive module connected to the diagnostic device.

[0060] In an embodiment provided in the present application, based on the above solution, optionally, the diagnostic device is used to:

[0061] Voting according to the fault diagnosis type represented by the first diagnostic signal and the fault diagnosis type represented by each of the second diagnostic signals to obtain a first voting result of the measuring device;

[0062] Diagnostic voting information is obtained according to the first voting result.

[0063] In an embodiment provided in the present application, based on the above solution, optionally, the control module is used to:

[0064] When the diagnosis voting information of each of the diagnosis devices is the same, the diagnosis voting information is determined as the fault diagnosis result of the measurement device.

[0065] In an embodiment provided in the present application, based on the above solution, optionally, the control module is used to:

[0066] When the diagnosis voting information of each of the diagnosis devices is different, an alarm message of system abnormality is output.

[0067] In an embodiment provided in the present application, based on the above solution, optionally, the control module is used to:

[0068] Voting according to the diagnostic voting information of each of the diagnostic devices to obtain a second voting result;

[0069] A fault diagnosis result of the measuring device is determined according to the second voting result.

[0070] In an embodiment provided in the present application, based on the above solution, optionally, Figure 3 As shown, it also includes: a synchronization module 104;

[0071] The synchronization module is used to send an output clock signal to each of the fault diagnosis devices.

[0072] In an embodiment provided in the present application, based on the above-mentioned solution, optionally, the fault diagnosis device includes an excitation source.

[0073] Taking the three-channel disconnection diagnosis circuit as an example, the composition and working principle of the diagnostic system of the measuring device are explained. Figure 4 As shown, the system is mainly composed of a measuring device to be diagnosed, three excitation sources (excitation source A, excitation source B, excitation source C), three interaction modules (interaction AB, interaction BC, interaction AC) and a synchronization module.

[0074] The measurement device to be diagnosed builds three independent channel loops with excitation source A, excitation source B, and excitation source C. In this system, the current signal is converted into a voltage signal in the measurement device and then received by the corresponding excitation source. The excitation source is equipped with a comparator, which can analyze and judge the received voltage signal to determine whether the corresponding loop is broken.

[0075] The disconnection information of the three groups of circuits is transmitted through three interactive modules, which can effectively distinguish between external device failures and internal circuit failures. For example, if the disconnection is caused by a problem with the external device, a specific pattern will be presented in the process of information transmission by the interactive module; and if it is an internal circuit failure, the information transmission will also have corresponding characteristics, thus providing a basis for accurately judging the type of fault.

[0076] The synchronization module outputs a synchronous diagnostic clock for excitation source A, excitation source B, and excitation source C. The existence of this synchronous clock ensures that the three channels can respond quickly when performing disconnection diagnosis, and the diagnostic processes between channels do not interfere with each other. It is like a precise collaborative system, where each part works in an orderly manner according to a unified rhythm, thereby improving the efficiency and accuracy of the entire system.

[0077] The synchronization module sends the same source clock signal to the excitation source A, excitation source B and excitation source C. This same source clock signal provides a unified time basis for disconnection diagnosis. Figure 5 As shown, assuming that the time required for each channel to independently perform a line break diagnosis is 10ms, since the three channels can perform diagnostic operations simultaneously, in this case, the three channels ABC can complete the asynchronous diagnostic operations in parallel within 30ms at the fastest.

[0078] After a single channel completes the line break diagnosis, the channel needs to keep outputting the line break diagnosis signal until all channels complete the line break diagnosis. This mechanism is crucial because if the signal state is changed too early, it may transmit incorrect diagnostic information, thus affecting the entire system's judgment of the fault. For example, in a complex circuit system, the diagnosis of each channel is interrelated. If a channel changes the signal too early, it may mislead other channels in their judgment of the overall fault situation. Therefore, the signal must be maintained in strict accordance with the requirement that all channels complete the diagnosis.

[0079] After all channels have completed the disconnection diagnosis, the three excitation sources begin to send the diagnostic information of the channel to the interactive module, and receive the diagnostic information of other channels from the interactive module, and then vote on the diagnostic information. Take channel A as an example to explain this process in detail: when channel C completes the disconnection diagnosis, excitation source A will send its own disconnection diagnostic information to interactive AB and interactive AC, and receive the disconnection diagnostic information of channel B and channel C from interactive AB and interactive AC at the same time. In this way, excitation source A can obtain the disconnection diagnostic information of the three channels at the same time, so as to prepare for the subsequent fault confirmation.

[0080] Excitation source A will vote on the disconnection diagnosis information of the three channels. If all three channels are diagnosed as disconnected, then the measuring device is judged to be disconnected, that is, an external open circuit fault; if only one of the three channels is diagnosed as disconnected, then it is considered that the excitation source of the channel is faulty, that is, an internal disconnection fault. Similarly, excitation sources B and C will also perform similar voting operations on the channel disconnection diagnosis information they receive. After this process, three pieces of diagnostic confirmation information after voting will be obtained. At this time, if the three pieces of information are consistent, then the existence of the fault can be confirmed. This multi-channel interaction and voting method can effectively avoid fault misjudgment caused by factors such as hardware drift and software failure, greatly improve the accuracy of disconnection diagnosis information, and thus significantly reduce the probability of misdiagnosis.

[0081] The embodiment of the present invention provides a fault diagnosis method for a measuring device, which is applied to a control module in a fault diagnosis system of the measuring device. The method flow chart of the method is as follows: Figure 6 As shown, specifically including:

[0082] S601: Acquire diagnostic voting information of each of the diagnostic devices; the diagnostic voting information of each of the diagnostic devices is determined based on a first diagnostic signal of the diagnostic device to be diagnosed by the diagnostic device and a second fault diagnostic signal of the measuring device to be diagnosed by other diagnostic devices.

[0083] S602: Determine the fault diagnosis result of the measuring device according to the diagnosis voting information of each of the diagnostic devices.

[0084] In the embodiments provided in the present application, each diagnostic device can perform fault diagnosis on the measuring device to be detected, obtain a first diagnostic signal, and obtain a second fault diagnosis signal obtained by other diagnostic devices performing fault diagnosis on the measuring device; obtain diagnostic voting information according to the first diagnostic signal and the second diagnostic signal; the control module can obtain the diagnostic voting information of each of the diagnostic devices; determine the fault diagnosis result of the measuring device according to the diagnostic voting information of each of the diagnostic devices. Applying the method provided in the embodiments of the present application, it is possible to efficiently and accurately perform fault diagnosis on the measuring device.

[0085] In an embodiment provided by the present application, based on the above solution, optionally, determining the fault diagnosis result of the measuring device according to the diagnosis voting information of each of the diagnostic devices includes:

[0086] When the diagnosis voting information of each of the diagnosis devices is the same, the diagnosis voting information is determined as the fault diagnosis result of the measurement device.

[0087] In an embodiment provided in the present application, based on the above solution, optionally, further comprising:

[0088] When the diagnosis voting information of each of the diagnosis devices is different, an alarm message of system abnormality is output.

[0089] In an embodiment provided by the present application, based on the above solution, optionally, determining the fault diagnosis result of the measuring device according to the diagnosis voting information of each of the diagnostic devices includes:

[0090] Voting according to the diagnostic voting information of each of the diagnostic devices to obtain a second voting result;

[0091] A fault diagnosis result of the measuring device is determined according to the second voting result.

[0092] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0093] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0094] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0095] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0096] The above is a detailed introduction to a fault diagnosis method for a measuring device provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for a person skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A fault diagnosis system for a measuring device, characterized in that: include: multiple diagnostic devices and control modules; Each of the diagnostic devices is used to perform fault diagnosis on the measuring device to be detected, obtain a first diagnostic signal, and obtain a second fault diagnosis signal obtained by other diagnostic devices performing fault diagnosis on the measuring device; obtain diagnostic voting information according to the first diagnostic signal and the second diagnostic signal; The control module is used to obtain the diagnostic voting information of each of the diagnostic devices; and determine the fault diagnosis result of the measuring device according to the diagnostic voting information of each of the diagnostic devices.

2. The system according to claim 1, characterized in that Also includes: Interactive devices; The diagnostic device is further configured to send the first diagnostic signal to the interactive device, so that the interactive device sends the first diagnostic signal to other diagnostic devices.

3. The system according to claim 2, characterized in that The interactive device comprises: a plurality of interactive modules; any two of the diagnostic devices are connected via one of the interactive modules; Each of the diagnostic devices is used to send the first diagnostic signal to the interactive module connected to the diagnostic device, so as to be transmitted to other diagnostic devices by the interactive module connected to the diagnostic device.

4. The system according to claim 1, characterized in that The diagnostic device is used for: Voting according to the fault diagnosis type represented by the first diagnostic signal and the fault diagnosis type represented by each of the second diagnostic signals to obtain a first voting result of the measuring device; Diagnostic voting information is obtained according to the first voting result.

5. The system according to claim 1, characterized in that The control module is used for: When the diagnosis voting information of each of the diagnosis devices is the same, the diagnosis voting information is determined as the fault diagnosis result of the measurement device.

6. The system according to claim 5, characterized in that The control module is also used for: When the diagnosis voting information of each of the diagnosis devices is different, an alarm message of system abnormality is output.

7. The system according to claim 1, characterized in that The control module is used for: Voting according to the diagnostic voting information of each of the diagnostic devices to obtain a second voting result; A fault diagnosis result of the measuring device is determined according to the second voting result.

8. The system according to claim 1, characterized in that Also includes: Synchronization module; The synchronization module is used to send an output clock signal to each of the fault diagnosis devices.

9. The system according to claim 1, characterized in that The fault diagnosis device includes an excitation source.

10. A fault diagnosis method for a measuring device, characterized in that: A control module applied to a fault diagnosis system of a measuring device, wherein the fault diagnosis system of the measuring device further comprises a plurality of diagnostic devices, and the method comprises: Acquire diagnostic voting information of each of the diagnostic devices; the diagnostic voting information of each of the diagnostic devices is determined based on a first diagnostic signal of the diagnostic device to be diagnosed by the diagnostic device and a second fault diagnostic signal of the measuring device by other diagnostic devices; The fault diagnosis result of the measuring device is determined according to the diagnosis voting information of each of the diagnostic devices.

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