Valve fault self-checking method and system based on current detection and storage medium

Abstract

The invention provides a valve fault self-checking method and system based on current detection and a storage medium, and the method comprises the steps: firstly, collecting the working current of a valve driving chip in real time through a non-contact current sensor, and reducing the interference of an external signal on a measurement signal through a non-intrusive design; secondly, analyzing the current curve, the current operation amplitude and the current instantaneous change rate to obtain real-time model matching data; then, dynamic characteristic model reference data is established based on historical current data in the valve state switching process, and the adaptability of an alarm threshold value and the valve working state is improved; and finally, comparing real-time model matching data with theoretical characteristic model reference data, analyzing and identifying abnormal conditions, and triggering graded early warning response or redundancy control operation according to the abnormal conditions. Wherein invalid warning is reduced and the equipment maintenance efficiency is improved by adopting a multi-stage early warning mechanism; in addition, the fault-tolerant rate of the working of the instrument / meter valve is improved through redundancy control operation.

Description

Technical Field

[0001] The present invention relates to the field of valve self - inspection, and more specifically, to a valve fault self - inspection method, system and storage medium based on current detection Background Art

[0002] Currently, there are various defects in the control of instrument / meter valves, mainly due to the following factors: On the first hand, electromagnetic interference causes signal anomalies: The signals for controlling valves are vulnerable to external interference, especially electromagnetic interference. For example, in a complex electromagnetic environment, the electromagnetic radiation generated by electrical equipment and transmission lines will distort and distort the control signals during transmission. After the valve receives the distorted signal, the instruction deviation causes misoperation, seriously affecting the system operation and control accuracy.

[0003] On the second hand, mechanical components wear and age: Under long - term use, mechanical components such as the valve core, valve stem, and seal of the valve will inevitably wear and age. And under the action of reciprocating motion, pressure and environmental factors, the component accuracy decreases and the fit deteriorates, and the valve is prone to jamming and even unable to open and close normally.

[0004] On the third hand, foreign objects interfere with normal operation: Since the valve action is a mechanical movement, foreign objects entering it are likely to interfere with its normal operation. When foreign objects enter between moving parts such as the valve core and valve seat, they hinder the movement of the valve core, making the valve unable to open and close according to the instruction, resulting in control failure.

[0005] Therefore, there is an urgent need for a self - inspection technology for instrument valve faults that can automatically detect and report the working state of the valve. Summary of the Invention

[0006] In view of the above problems, the purpose of the present invention is to provide a valve fault self - inspection method, system and storage medium based on current detection. First, the working current of the valve drive chip is collected in real - time through a non - contact current sensor, and the interference of external signals on the measurement signal is reduced through a non - invasive design. Secondly, real - time model matching data is obtained by analyzing the current curve, current running amplitude and current instantaneous change rate. Then, a dynamic characteristic model reference data is established based on the historical current data during the valve state switching process to improve the adaptability of the alarm threshold to the valve working state. Finally, by comparing the real - time model matching data with the theoretical characteristic model reference data, abnormal situations are analyzed and identified, and then a hierarchical early - warning response or redundant control operation is triggered according to the abnormal situations. Among them, a multi - level early - warning mechanism is adopted to reduce ineffective warnings and improve the efficiency of equipment maintenance. In addition, the redundant control operation is also used to improve the fault tolerance rate of the instrument / meter valve operation.

[0007] The first aspect of the present invention provides a valve fault self - inspection method based on current detection, and the method includes: Judge when sending a valve control signal; Dynamically collect the first current information of the valve drive chip according to a preset first sampling frequency; Obtain a first current curve, a first operating amplitude, and a first instantaneous change rate according to the first sampling frequency and the first current information; Perform pattern matching analysis based on the first current curve, the first operating amplitude, and the first instantaneous change rate to obtain first model matching information; Obtain a characteristic model reference value; When it is determined that the first model matching information does not meet the preset parameter conditions; Based on a preset fault classification model, analyze the first model matching information that does not meet the preset parameter conditions to obtain first confidence information and trigger a hierarchical alarm mechanism; When it is determined that the first confidence information exceeds a preset first confidence threshold, start redundant control.

[0008] In this solution, it further includes: Obtain the first operation times information of the valve; Determine first weight information according to the first operation times information; Update the characteristic model reference value based on the historical operating current data of the valve and the first weight information; The characteristic model reference value at least includes a first rising change rate in the opening stage, a first steady-state amplitude in the steady-state stage, and a first decay duration in the closing stage.

[0009] In this solution, the first model matching information exceeding the characteristic model reference value specifically means: When in the opening stage of the valve state switch, the first instantaneous change rate exceeds the change rate range set based on the first rising change rate; When in the process of the valve state switch, the first operating amplitude exceeds the amplitude range set based on the first steady-state amplitude; When in the end stage of the valve state switch, the decay duration obtained based on the first current curve exceeds the duration range set based on the first decay duration.

[0010] In this solution, the triggered hierarchical alarm mechanism specifically includes: The hierarchical alarm is at least three levels, including a first-level early warning, a second-level early warning, and a third-level early warning; When the first current information exceeds a preset first current threshold, trigger a first-level early warning and execute log recording; When the first operating amplitude exceeds a preset first steady-state amplitude threshold, trigger a second-level early warning, execute status prompt, and increase the first confidence information; When it is determined based on the first current curve that the valve state switching duration exceeds a preset first duration threshold, a third-level warning is triggered, local acoustic and optical prompts are executed, and the first confidence level information is increased.

[0011] In this solution, the start of redundant control specifically includes: Stop the current valve state switching operation and start the troubleshooting program; Determine whether the troubleshooting program can be completed; If so, lower the first confidence level information; If not, increase the first confidence level information; When the first confidence level information exceeds a preset second confidence level threshold, the standby valve is automatically switched and a maintenance request is sent.

[0012] In this solution, the dynamic acquisition of the first current information of the valve drive chip specifically is: Measure the supply circuit current of the valve drive chip through a non-contact sensor; Among them, the non-contact sensor is a Hall current sensor; Among them, an electromagnetic shielding layer is provided between the Hall current sensor and the current circuit.

[0013] The second aspect of the present invention provides a valve fault self-checking system based on current detection, including a valve fault self-checking method program based on current detection. When the valve fault self-checking method program based on current detection is executed by the processor, the following steps are implemented: Judge when sending a valve control signal; According to a preset first sampling frequency, dynamically acquire the first current information of the valve drive chip; According to the first sampling frequency and the first current information, obtain a first current curve, a first operating amplitude, and a first instantaneous change rate; Perform pattern matching analysis based on the first current curve, the first operating amplitude, and the first instantaneous change rate to obtain first model matching information; Obtain a characteristic model reference value; Judge when the first model matching information does not meet the preset parameter conditions; Based on a preset fault classification model, analyze the first model matching information that does not meet the preset parameter conditions to obtain first confidence level information and trigger a classification alarm mechanism; Judge that when the first confidence level information exceeds a preset first confidence level threshold, start redundant control.

[0014] In this solution, it further includes: Obtain the first operation times information of the valve; Determine the first weight information according to the first number of running times information; Update the characteristic model reference value based on the historical running current data of the valve and the first weight information; The characteristic model reference value at least includes a first rising change rate in the opening stage, a first steady-state amplitude in the steady-state stage, and a first decay duration in the closing stage.

[0015] In this solution, the startup redundant control specifically includes: Stop the current valve state switching operation and start the troubleshooting program; Determine whether the troubleshooting program can be completed; If so, lower the first confidence information; If not, raise the first confidence information; When the first confidence information exceeds a preset second confidence threshold, automatically switch to a standby valve and send a maintenance request.

[0016] A third aspect of the present invention provides a computer-readable storage medium, which includes a program for a valve fault self-checking method based on current detection. When the program for the valve fault self-checking method based on current detection is executed by a processor, the steps of the valve fault self-checking method based on current detection as described in any one of the above are implemented.

[0017] The present invention provides a valve fault self-checking method, system and storage medium based on current detection. First, the working current of the valve drive chip is collected in real time through a non-contact current sensor, and the interference of external signals on the measurement signal is reduced through a non-invasive design; secondly, real-time model matching data is obtained by analyzing the current curve, current running amplitude and current instantaneous change rate; then, dynamic characteristic model reference data is established based on the historical current data of the valve state switching process to improve the adaptability of the alarm threshold to the valve working state; finally, by comparing the real-time model matching data with the theoretical characteristic model reference data, abnormal situations are analyzed and identified, and then a hierarchical early warning response or redundant control operation is triggered according to the abnormal situations; among them, a multi-level early warning mechanism is adopted to reduce invalid warnings and improve the efficiency of equipment maintenance; in addition, the fault tolerance rate of the instrument / valve work is also improved through redundant control operations. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope.

[0019] Figure 1 Shows a flowchart of a valve fault self-checking method based on current detection according to the present invention; Figure 2 Shows the flowchart of dynamically updating the reference value of the feature model provided by the embodiments of the present invention; Figure 3 Shows the execution flowchart of redundancy control provided by the embodiments of the present invention; Figure 4 Shows the block diagram of a valve fault self-checking system based on current detection according to the present invention. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0021] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. It should also be understood that terms such as those defined in a general dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the embodiments of the present invention.

[0022] The "first", "second" and similar terms used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Terms such as "a", "an" or "the" do not indicate a limitation of quantity, but indicate the existence of at least one. Similarly, terms such as "comprising" or "including" mean that the elements or items appearing before this term cover the elements or items listed after this term and their equivalents, without excluding other elements or items. "Connection" or "coupling" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The steps before or after the methods of the embodiments of the present invention do not necessarily have to be carried out precisely in order. On the contrary, they can be carried out in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or several steps can be removed from these processes.

[0023] In addition, in each embodiment of the present invention, the functional modules can be integrated together to form an independent part, or each module can exist alone, or two or more modules can be integrated to form an independent part.

[0024] Figure 1 Shows the flowchart of a valve fault self-checking method based on current detection according to the present invention.

[0025] As Figure 1 shown, the first aspect of the present invention discloses a valve fault self - inspection method based on current detection, and the method includes: S102, when judging to send a valve control signal; S104, dynamically collect the first current information of the valve drive chip according to a preset first sampling frequency; S106, obtain a first current curve, a first operating amplitude, and a first instantaneous change rate according to the first sampling frequency and the first current information; S108, perform pattern matching analysis based on the first current curve, the first operating amplitude, and the first instantaneous change rate to obtain first model matching information; S110, obtain a characteristic model reference value; S112, when judging that the first model matching information does not meet the preset parameter conditions; S114, analyze the first model matching information that does not meet the preset parameter conditions based on a preset fault classification model to obtain first confidence information and trigger a classification alarm mechanism; S116, when judging that the first confidence information exceeds a preset first confidence threshold, start redundant control.

[0026] It should be noted that the first current information is the operating current of the valve drive chip; the first current curve is a current curve that changes with time drawn based on the operating current of the valve drive chip according to the sampling frequency; the first operating amplitude is the current value when the operating current of the valve drive chip is in a stable state within a set period; the first instantaneous change rate is the change rate of the operating current of the valve drive chip, that is, the current change speed, with the unit of A / s; the first model matching information includes at least the first current curve, the first operating amplitude, and the first instantaneous change rate; the first confidence information is used to represent the probability of a fault affecting the opening and closing of the valve.

[0027] In this embodiment, when the instrument / meter controls the valve to switch states, including opening or closing the valve, a valve control signal will be sent to the valve drive chip (such as BL8310) to drive the valve to work. After detecting the sending of the valve control signal, first, the working current of the valve drive chip is collected in real time and dynamically by the set current detection sensor at a sampling frequency not lower than the preset first sampling frequency; in practical applications, the first sampling frequency is 1 kHz. Secondly, according to the sampling frequency of the working current and the real-time current value, a current curve of the working current changing with time is drawn, and then the current change speed (unit: A / s) at each sampling moment and the current value at the steady state are obtained through analysis and calculation. Then, based on the analyzed data, the analysis is used as the first model matching information for comparison with the dynamically updated characteristic model reference value. When the model data in the first model matching information is not within the range of the characteristic model reference value, it is determined that there is an abnormality in the valve switching. At this time, based on the preset fault classification model, the data in the first model matching information that exceeds the range of the characteristic model reference value is analyzed to obtain the corresponding warning level. Finally, the corresponding alarm mechanism is executed according to the warning level and the redundant control is started according to the confidence level of the valve failure; a multi-level warning mechanism is adopted to reduce invalid warnings and improve the efficiency of equipment maintenance, and the fault tolerance rate of the instrument / meter valve work is improved through redundant control operations.

[0028] Figure 2 The flowchart showing the dynamically updated characteristic model reference value provided by the embodiment of the present invention is shown.

[0029] According to the embodiment of the present invention, as Figure 2 shown, it further includes: S202, obtaining the first operation times information of the valve; S204, determining the first weight information according to the first operation times information; S206, updating the characteristic model reference value based on the historical operating current data of the valve and the first weight information; The characteristic model reference value at least includes the first rising change rate in the opening stage, the first steady-state amplitude in the steady-state stage, and the first decay duration in the closing stage.

[0030] It should be noted that the first operation times information is the cumulative switching times of the valve; the first weight information is the calculation parameter for updating the characteristic model reference value; the first rising change rate is the reasonable range of the current change rate when the working current is in the rising stage during the valve state opening switch, and it is one of the characteristic model reference values; the first steady-state amplitude is the current value when the working current is in the stable stage during the valve state switching process, and it is one of the characteristic model reference values; the first decay duration is the decay duration when the working current is in the falling stage when the valve state is completely switched, and it is one of the characteristic model reference values.

[0031] In this embodiment, according to the usage of the valve, the reference value of the characteristic model of the valve is dynamically adjusted and updated to avoid the limitations of the traditional fixed threshold scheme. As an implementation manner, according to the cumulative switching times of the valve, a preset corresponding table of the number weight is searched to determine the first weight information, where the first weight information is used as the weighting coefficient of the historical data. Based on the historical operating current data of the valve, according to a preset standard reference value algorithm and in combination with the corresponding weighting coefficient, the reference value of the characteristic model is obtained.

[0032] According to the embodiment of the present invention, the first model matching information exceeds the reference value of the characteristic model, specifically: When in the valve state switching opening stage, the first instantaneous change rate exceeds the change rate range set based on the first rising change rate; When in the valve state switching process, the first operating amplitude exceeds the amplitude range set based on the first steady-state amplitude; When in the valve state switching end stage, the decay duration obtained based on the first current curve exceeds the duration range set based on the first decay duration.

[0033] It should be noted that in this embodiment, a segmented comparison model is adopted based on the dynamic process of valve switching to analyze the switching working conditions of the valve. When in the valve state switching opening stage, the change rate of the rising current will be verified. For example, when the instantaneous change rate of the current in the opening stage is within the interval of 0.5 A / s to 1.5 A / s, it indicates that there is no abnormality in the opening stage of the valve. When in the valve state switching process, the amplitude and the current fluctuation of the current will be verified; if the amplitude is outside the reference range, it indicates that there is a continuous blockage in the operation of the valve; if the current fluctuation exceeds the reference range, it indicates that there is an intermittent blockage in the valve; that is to say, by verifying the amplitude and the current fluctuation of the current, it is used to determine whether there is a mechanical failure in the valve. When in the valve state switching end stage, the decay duration of the current will be verified; if the decay duration exceeds the reference range, it is determined that the degree of wear of the internal components of the valve has increased. In addition, by verifying data such as the duration when the current is in the steady state, the current decay speed, and the trend of the current curve, the working condition result of the valve is analyzed.

[0034] According to the embodiment of the present invention, the triggering of the hierarchical alarm mechanism specifically includes: The hierarchical alarm is at least three levels, including a first-level early warning, a second-level early warning, and a third-level early warning; When the first current information exceeds the preset first current threshold, trigger a first-level early warning and execute log recording; When the first operating amplitude exceeds a preset first steady-state amplitude threshold, a secondary warning is triggered, a status prompt is executed, and the first confidence information is increased. When it is determined based on the first current curve that the valve state switching duration exceeds a preset first duration threshold, a tertiary warning is triggered, a local audible and visual prompt is executed, and the first confidence information is increased.

[0035] It should be noted that, as an implementation manner, this embodiment provides at least three levels of warning mechanisms. For a primary warning, it is an abnormal situation that does not affect the valve operation. For example, the working current briefly exceeds the set current threshold. For such an abnormality, the log recording method is used to save the scene where the abnormality occurs. For a secondary warning, it represents an abnormal situation that has a minor impact on the valve operation. For example, when the valve operating current amplitude exceeds the steady-state current amplitude, it can be determined that there is a mechanical block. Although such an abnormality will affect the valve switching process, it does not affect the valve switching result. Then, the status prompt method is adopted, and a prompt is issued through devices such as LEDs during the valve switching process. In addition, the confidence level of the valve failure is increased. For a tertiary warning, it represents an abnormal situation that has a greater impact on the valve operation, and there is a probability that the valve cannot complete the switching operation. For example, when the time required for valve switching is too long, it can be determined that there are problems such as valve component wear. Such an abnormality may affect the valve switching result, so an audible and visual prompt at the valve site is executed to indicate that there is a wear risk for the current valve, and local maintenance can be performed.

[0036] Figure 3 The execution flowchart of the redundancy control provided by the embodiment of the present invention is shown.

[0037] According to the embodiment of the present invention, as Figure 3 shown, the activation of the redundancy control specifically includes: S302, stop the current valve state switching operation and start the troubleshooting program; S304, determine whether the troubleshooting program can be completed; S306, if so, decrease the first confidence information; S308, if not, increase the first confidence information; S310, when the first confidence information exceeds a preset second confidence threshold, automatically switch to the standby valve and send a maintenance request.

[0038] It should be noted that in this embodiment, when the fault confidence level exceeds the set first confidence threshold, by performing a redundancy control operation, an attempt is made to clear the fault by itself or request maintenance to improve the fault tolerance rate of the instrument / instrument valve operation. When the fault confidence level exceeds the set threshold, first stop the valve switching operation, and then start the fault clearing program. Through the set self-fault clearing actions, an attempt is made to handle the fault. If the fault clearing program can be executed completely, it indicates that the valve condition meets the basic requirements for opening and closing switching. At this time, the fault confidence level of the valve is lowered. If the fault clearing program cannot be executed completely, it indicates that the current valve condition cannot meet the requirements for opening and closing switching. At this time, the fault confidence level of the valve is raised. When the valve fault confidence level exceeds the set second confidence threshold, a maintenance request is immediately sent to improve the maintenance efficiency. In addition, in an instrument / instrument system with a standby valve, it will also automatically switch to the standby valve to ensure the operation requirements of the instrument / instrument. When the valve fault confidence level does not exceed the set second confidence threshold, the valve is still allowed to attempt to perform the switching operation.

[0039] According to an embodiment of the present invention, the dynamic acquisition of the first current information of the valve drive chip is specifically: Measure the supply circuit current of the valve drive chip through a non-contact sensor; Wherein, the non-contact sensor is a Hall current sensor; Wherein, an electromagnetic shielding layer is provided between the Hall current sensor and the current circuit.

[0040] It should be noted that as an implementation method, in this embodiment, a Hall current sensor is used to measure the working current of the valve drive chip. A non-contact sensor is used to detect the supply circuit current, shielding the influence of the supply circuit on the measurement circuit and improving the measurement accuracy. In addition, an electromagnetic shielding layer is further provided between the Hall current sensor and the current circuit to further suppress external electromagnetic interference.

[0041] It is worth mentioning that it also includes: Obtain the first environmental parameter information, wherein the first environmental information at least includes a temperature value, a humidity value, and an electromagnetic intensity; According to the first environmental parameter information, search a preset weight correspondence table to obtain second weight information; According to the second weight information, correct the characteristic model reference value.

[0042] It should be noted that in this embodiment, environmental parameters (such as temperature, humidity, electromagnetic intensity, etc.) are also introduced to adaptively adjust the characteristic model reference value. Determine the second weight information according to the environmental parameters, and use the second weight information as an adjustment coefficient to correct the characteristic model reference value, further improving the adaptability of the alarm threshold to the valve working state.

[0043] It is worth mentioning that it also includes: Sending the valve historical current data to a time series prediction model to obtain first life information; When it is determined that the first life information is lower than a preset life threshold, a preventive maintenance request is sent.

[0044] It should be noted that in this embodiment, by using time series algorithms (such as ARIMA, LSTM) to analyze the historical current data when the valve switches, it is used to predict the remaining service life of the valve. According to the remaining service life, maintenance suggestions are generated in advance.

[0045] It is worth mentioning that it also includes: Sending the valve historical current data and maintenance processing logs to a preset fault analysis neural network model to obtain first sensitivity adjustment information; According to the first sensitivity adjustment information, the reference value of the feature model and the confidence threshold are corrected.

[0046] It should be noted that in this embodiment, by combining the historical current data of the valve and the maintenance processing logs uploaded by the maintenance personnel, a preset fault analysis neural network model is used to dynamically optimize the feature model or the alarm threshold. Automatically reduce the sensitivity after multiple false alarms, or improve the detection accuracy after missed alarms.

[0047] Figure 4 The block diagram of a valve fault self-checking system based on current detection according to the present invention is shown.

[0048] Such as Figure 4 As shown, the second aspect of the present invention discloses a valve fault self-checking system 4 based on current detection, including a memory 41 and a processor 42. The memory includes a valve fault self-checking method program based on current detection. When the valve fault self-checking method program based on current detection is executed by the processor, the following steps are implemented: When it is determined to send a valve control signal; Dynamically collecting first current information of the valve drive chip according to a preset first sampling frequency; According to the first sampling frequency and the first current information, a first current curve, a first operating amplitude, and a first instantaneous change rate are obtained; Based on the first current curve, the first operating amplitude, and the first instantaneous change rate, pattern matching analysis is performed to obtain first model matching information; Obtaining a reference value of the feature model; When it is determined that the first model matching information does not meet the preset parameter conditions; Based on a preset fault classification model, the first model matching information that does not meet the preset parameter conditions is analyzed to obtain first confidence information and trigger a classification alarm mechanism; When it is determined that the first confidence information exceeds a preset first confidence threshold, redundant control is initiated.

[0049] It should be noted that the first current information is the operating current of the valve drive chip; the first current curve is a current curve that changes with time drawn based on the sampling frequency of the operating current of the valve drive chip; the first operating amplitude is the current value when the operating current of the valve drive chip is in a stable state within a set period; the first instantaneous change rate is the change rate of the operating current of the valve drive chip, that is, the current change speed, with the unit of A / s; the first model matching information at least includes the first current curve, the first operating amplitude, and the first instantaneous change rate; the first confidence information is used to represent the probability of a fault affecting valve opening and closing.

[0050] In this embodiment, when the instrument / meter controls the valve switching state, including opening or closing the valve, a valve control signal will be sent to the valve drive chip (such as BL8310) to drive the valve to work. When it is detected that the valve control signal is sent, first, the operating current of the valve drive chip is collected in real time and dynamically through the set current detection sensor at a sampling frequency not lower than the preset first sampling frequency; where the first sampling frequency is 1 kHz in practical applications. Secondly, according to the sampling frequency of the operating current and the real-time current value, a current curve that changes with time of the operating current is drawn, and then the current change speed (unit: A / s) and the current value at the steady state are obtained through analysis and calculation at each sampling moment. Then, based on the analyzed data, the analysis is used as the first model matching information for comparison with the dynamically updated characteristic model reference value. When the model data in the first model matching information is not within the range of the characteristic model reference value, it is determined that there is an abnormality in the valve switching. At this time, based on the preset fault classification model, the data in the first model matching information that exceeds the range of the characteristic model reference value is analyzed to obtain the corresponding warning level. Finally, the corresponding alarm mechanism is executed according to the warning level and redundant control is initiated according to the confidence level of the valve failure; a multi-level warning mechanism is adopted to reduce ineffective warnings and improve the efficiency of equipment maintenance, and the fault tolerance rate of the instrument / meter valve operation is improved through redundant control operations.

[0051] According to an embodiment of the present invention, it further includes: Obtain the first operation times information of the valve; Determine the first weight information according to the first operation times information; Update the characteristic model reference value based on the historical operating current data of the valve and the first weight information; The characteristic model reference value at least includes the first rising change rate in the opening stage, the first steady-state amplitude in the steady-state stage, and the first decay duration in the closing stage.

[0052] It should be noted that the first operation count information is the cumulative switching count of the valve; the first weight information is the calculation parameter for updating the characteristic model reference value; the first rising change rate is the reasonable range of the current change rate when the working current is in the rising stage during the valve state opening switch, and it is one of the characteristic model reference values; the first steady-state amplitude is the current value when the working current is in the stable stage during the valve state switch, and it is one of the characteristic model reference values; the first decay duration is the decay duration when the working current is in the falling stage when the valve state is completely switched, and it is one of the characteristic model reference values.

[0053] In this embodiment, according to the usage of the valve, the characteristic model reference value of the valve is dynamically adjusted and updated to avoid the limitations of the traditional fixed threshold scheme. As an implementation manner, according to the cumulative switching count of the valve, a preset count-weight corresponding table is searched to determine the first weight information, where the first weight information is used as the weighting coefficient for historical data. Based on the current data of the historical operation of the valve, according to the preset standard reference value algorithm and in combination with the corresponding weighting coefficient, the characteristic model reference value is obtained.

[0054] According to the embodiment of the present invention, the first model matching information exceeds the characteristic model reference value, specifically: When in the valve state switching opening stage, the first instantaneous change rate exceeds the change rate range set based on the first rising change rate; When in the valve state switching process, the first operation amplitude exceeds the amplitude range set based on the first steady-state amplitude; When in the valve state switching end stage, the decay duration obtained based on the first current curve exceeds the duration range set based on the first decay duration.

[0055] It should be noted that in this embodiment, a segmented comparison model is adopted based on the dynamic process of valve switching to analyze the switching conditions of the valve. When in the opening stage of the valve state switching, the change rate of the verified current rise will be verified. For example, when the instantaneous change rate of the current in the opening stage is within the range of 0.5 A / s to 1.5 A / s, it indicates that there is no abnormality in the opening stage of the valve. When in the process of valve state switching, the amplitude of the current and the current fluctuation condition will be verified; if the amplitude is outside the reference range, it indicates that there is a continuous blockage in the operation of the valve; if the current fluctuation exceeds the reference range, it indicates that there is an intermittent blockage in the valve; that is to say, by verifying the amplitude of the current and the current fluctuation condition, it is used to determine whether there is a mechanical failure in the valve. When in the end stage of the valve state switching, the decay duration of the current will be verified; if the decay duration exceeds the reference range, it is determined that the internal components of the valve have an increased degree of wear. In addition, the working condition results of the valve are analyzed by verifying data such as the duration of the current in the steady state, the current decay speed, and the trend of the current curve.

[0056] According to the embodiment of the present invention, the triggering hierarchical alarm mechanism specifically includes: The hierarchical alarm is at least three levels, including a first-level early warning, a second-level early warning, and a third-level early warning; When the first current information exceeds the preset first current threshold, trigger a first-level early warning and execute log recording; When the first operating amplitude exceeds the preset first steady-state amplitude threshold, trigger a second-level early warning, execute a status prompt, and increase the first confidence information; When it is determined based on the first current curve that the valve state switching duration exceeds the preset first duration threshold, trigger a third-level early warning, execute a local sound and light prompt, and increase the first confidence information.

[0057] It should be noted that, as an implementation manner, this embodiment provides at least three levels of early warning mechanisms. For the first-level early warning, it is an abnormal situation that does not affect the valve operation. For example, the working current briefly exceeds the set current threshold. For such an abnormality, the method of logging is adopted to save the on-site situation where the abnormality occurs. For the second-level early warning, it represents an abnormal situation that has a relatively small impact on the valve operation. For example, when the amplitude of the valve operation current exceeds the steady-state current amplitude, it can be determined that there is a mechanical blockage. Although such an abnormality will affect the valve switching process, it does not affect the valve switching result. Then, the method of status prompt is adopted, and a prompt is issued through devices such as LEDs during the valve switching process. In addition, the confidence level of the valve failure is increased. For the third-level early warning, it represents an abnormal situation that has a relatively large impact on the valve operation, and there is a probability that the valve cannot complete the switching operation. For example, when the time required for the valve to switch is too long, it can be determined that there are problems such as valve component wear. Such an abnormality may affect the valve switching result, and then an audible and visual prompt at the valve site is executed to indicate that there is a wear risk for the current valve, and local maintenance can be performed.

[0058] According to the embodiment of the present invention, the startup of the redundant control specifically includes: Stop the current valve state switching operation and start the troubleshooting program; Judge whether the troubleshooting program can be completed; If so, lower the first confidence level information; If not, raise the first confidence level information; When the first confidence level information exceeds the preset second confidence level threshold, automatically switch to the standby valve and send a maintenance request.

[0059] It should be noted that in this embodiment, when the failure confidence level exceeds the set first confidence level threshold, by performing the redundant control operation, an attempt is made to clear the fault by itself or request maintenance, so as to improve the fault tolerance rate of the instrument / instrument valve. When the failure confidence level exceeds the set threshold, first stop the valve switching operation, and then start the troubleshooting program, and try to handle the fault through the set self-troubleshooting actions. If the troubleshooting program can be executed completely, it means that the valve working condition meets the basic requirements of the opening and closing switching. At this time, the failure confidence level of the valve is lowered. If the troubleshooting program cannot be executed completely, it means that the current valve working condition cannot meet the requirements of the opening and closing switching. At this time, the failure confidence level of the valve is raised. When the valve failure confidence level exceeds the set second confidence level threshold, a maintenance request is immediately sent to improve the maintenance efficiency. In addition, in an instrument / instrument system with a standby valve, it will also automatically switch to the standby valve to ensure the operation requirements of the instrument / instrument. When the valve failure confidence level does not exceed the set second confidence level threshold, the valve is still allowed to attempt to perform the switching operation.

[0060] According to an embodiment of the present invention, the specific operation of dynamically collecting the first current information of the valve driving chip is as follows: Measure the supply circuit current of the valve driving chip through a non-contact sensor; Among them, the non-contact sensor is a Hall current sensor; Among them, an electromagnetic shielding layer is provided between the Hall current sensor and the current circuit.

[0061] It should be noted that, as an implementation manner, in this embodiment, a Hall current sensor is used to measure the working current of the valve driving chip. The non-contact sensor is used to detect the supply circuit current, shielding the influence of the supply circuit on the measurement circuit and improving the measurement accuracy. In addition, an electromagnetic shielding layer is provided between the Hall current sensor and the current circuit to further suppress external electromagnetic interference.

[0062] It is worth mentioning that it further includes: Obtain the first environmental parameter information, where the first environmental information at least includes temperature value, humidity value, and electromagnetic intensity; According to the first environmental parameter information, search for a preset weight correspondence table to obtain the second weight information; According to the second weight information, correct the characteristic model reference value.

[0063] It should be noted that in this embodiment, environmental parameters (such as temperature, humidity, electromagnetic intensity, etc.) are also introduced to adaptively adjust the characteristic model reference value. The second weight information is determined according to the environmental parameters, and the second weight information is used as an adjustment coefficient to correct the characteristic model reference value, further improving the adaptability of the alarm threshold to the valve working state.

[0064] It is worth mentioning that it further includes: Send the valve historical current data to a time series prediction model to obtain the first service life information; When it is determined that the first service life information is lower than a preset service life threshold, send a preventive maintenance request.

[0065] It should be noted that in this embodiment, the historical current data during valve switching is analyzed by using time series algorithms (such as ARIMA, LSTM) to predict the remaining service life of the valve. According to the remaining service life, maintenance suggestions are generated in advance.

[0066] It is worth mentioning that it further includes: Send the valve historical current data and maintenance processing logs to a preset fault analysis neural network model to obtain the first sensitivity adjustment information; According to the first sensitivity adjustment information, correct the characteristic model reference value and confidence threshold.

[0067] It should be noted that in this embodiment, the preset fault analysis neural network model, dynamic optimization feature model or alarm threshold is optimized based on the historical current data of the valve and the maintenance processing log uploaded by the maintenance personnel. The sensitivity is automatically reduced after multiple false alarms, or the detection accuracy is improved after missed alarms.

[0068] The third aspect of the present invention provides a computer-readable storage medium, which includes a program for a valve fault self-checking method based on current detection. When the program for the valve fault self-checking method based on current detection is executed by a processor, the steps of the valve fault self-checking method based on current detection as described in any one of the above are implemented.

[0069] In summary, the present invention provides a valve fault self-checking method, system and storage medium based on current detection. First, the operating current of the valve drive chip is collected in real time through a non-contact current sensor, and the interference of external signals on the measurement signal is reduced through a non-invasive design; secondly, real-time model matching data is obtained by analyzing the current curve, current operation amplitude and current instantaneous change rate; then, a dynamic characteristic model reference data is established based on the historical current data of the valve state switching process to improve the adaptability of the alarm threshold to the valve working state; finally, by comparing the real-time model matching data with the theoretical characteristic model reference data, abnormal situations are analyzed and identified, and then a hierarchical early warning response or redundant control operation is triggered according to the abnormal situations; among them, a multi-level early warning mechanism is adopted to reduce invalid warnings and improve the efficiency of equipment maintenance; in addition, the fault tolerance rate of the instrument / instrument valve operation is also improved through redundant control operations.

[0070] If the above functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0071] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A valve fault self-checking method based on current detection, characterized in that, The method includes: Judging when sending a valve control signal; Dynamically collecting first current information of a valve drive chip according to a preset first sampling frequency; Obtaining a first current curve, a first operating amplitude, and a first instantaneous change rate according to the first sampling frequency and the first current information; Performing pattern matching analysis based on the first current curve, the first operating amplitude, and the first instantaneous change rate to obtain first model matching information; Obtaining a characteristic model reference value; Judging when the first model matching information does not meet the preset parameter conditions; Based on a preset fault classification model, analyzing the first model matching information that does not meet the preset parameter conditions to obtain first confidence information and triggering a hierarchical alarm mechanism; When it is judged that the first confidence information exceeds a preset first confidence threshold, start redundant control.

2. The valve fault self-checking method based on current detection according to claim 1, characterized in that It also includes: Obtaining first operation times information of the valve; Determining first weight information according to the first operation times information; Updating the characteristic model reference value based on the historical operating current data of the valve and the first weight information; The characteristic model reference value at least includes a first rising change rate in the opening stage, a first steady-state amplitude in the steady-state stage, and a first decay duration in the closing stage.

3. The valve fault self-checking method based on current detection according to claim 2, characterized in that, The first model matching information exceeding the characteristic model reference value specifically means: When in the opening stage of valve state switching, the first instantaneous change rate exceeds the change rate range set based on the first rising change rate; When in the process of valve state switching, the first operating amplitude exceeds the amplitude range set based on the first steady-state amplitude; When in the end stage of valve state switching, the decay duration obtained based on the first current curve exceeds the duration range set based on the first decay duration.

4. A valve fault self-checking method based on current detection according to claim 1, characterized in that The triggering hierarchical alarm mechanism specifically includes: The hierarchical alarm is at least three levels, including a first-level early warning, a second-level early warning, and a third-level early warning; When the first current information exceeds a preset first current threshold, trigger a first-level early warning and execute log recording; When the first operating amplitude exceeds a preset first steady-state amplitude threshold, trigger a second-level early warning, execute a status prompt, and increase the first confidence information; When it is judged based on the first current curve that the valve state switching duration exceeds a preset first duration threshold, trigger a third-level early warning, execute a local sound and light prompt, and increase the first confidence information.

5. A valve fault self-checking method based on current detection according to claim 1, characterized in that The start of redundant control specifically includes: Stop the current valve state switching operation and start a troubleshooting program; Judge whether the troubleshooting program can be completed; If so, reduce the first confidence information; If not, increase the first confidence information; When the first confidence information exceeds a preset second confidence threshold, automatically switch to a standby valve and send a maintenance request.

6. The valve fault self-checking method based on current detection according to claim 1, characterized in that, The dynamic collection of the first current information of the valve drive chip specifically means: Measuring the supply circuit current of the valve drive chip through a non-contact sensor; Wherein, the non-contact sensor is a Hall current sensor; Wherein, an electromagnetic shielding layer is arranged between the Hall current sensor and the current loop.

7. A valve fault self-checking system based on current detection, characterized in that, The system includes a memory and a processor. The memory includes a program for a valve fault self-checking method based on current detection. When the program for the valve fault self-checking method based on current detection is executed by the processor, the following steps are implemented: Judge when a valve control signal is sent; Dynamically collect first current information of a valve drive chip according to a preset first sampling frequency; Obtain a first current curve, a first operating amplitude, and a first instantaneous change rate according to the first sampling frequency and the first current information; Perform pattern matching analysis based on the first current curve, the first operating amplitude, and the first instantaneous change rate to obtain first model matching information; Obtain a characteristic model reference value; Judge when the first model matching information does not meet the preset parameter conditions; Based on a preset fault classification model, analyze the first model matching information that does not meet the preset parameter conditions to obtain first confidence information and trigger a classification alarm mechanism; When the first confidence information exceeds a preset first confidence threshold, start redundant control.

8. A valve fault self-checking system based on current detection according to claim 7, characterized in that, It further includes: Obtain first operation times information of the valve; Determine first weight information according to the first operation times information; Update the characteristic model reference value based on the historical operating current data of the valve and the first weight information; The characteristic model reference value at least includes a first rising change rate in the opening stage, a first steady-state amplitude in the steady-state stage, and a first decay duration in the closing stage.

9. The valve fault self-checking system based on current detection according to claim 7, wherein The start of redundant control specifically includes: Stop the current valve state switching operation and start a fault clearing program; Judge whether the fault clearing program can be completed; If so, lower the first confidence information; If not, raise the first confidence information; When the first confidence information exceeds a preset second confidence threshold, automatically switch to a standby valve and send a maintenance request.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The computer-readable storage medium includes a program for a valve fault self-checking method based on current detection. When the program for the valve fault self-checking method based on current detection is executed by a processor, the steps of the valve fault self-checking method based on current detection according to any one of claims 1 to 6 are implemented.

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