Operation detection method and system for differential pressure transmitter

Abstract

The invention discloses an operation detection method and system for a differential pressure transmitter, and relates to the technical field of differential pressure transmitter detection, and the method comprises the steps: collecting an output end signal of the differential pressure transmitter, processing the output end signal to generate a corresponding output signal flow, carrying out the feature extraction of the output signal flow, and carrying out the feature extraction of the output signal flow; the method comprises the following steps of: extracting the operation characteristic information of the differential pressure transmitters, performing confidence weight assignment on the corresponding differential pressure transmitters according to the operation characteristic information so as to generate operation coefficients of the corresponding differential pressure transmitters, and performing corresponding state mode detection according to the operation coefficients of the differential pressure transmitters. The method comprises the following steps: detecting the running state of each differential pressure transmitter, carrying out fault classification on the differential pressure transmitters with abnormal running states, arranging related operation and maintenance personnel to carry out maintenance, and carrying out periodic detection on the differential pressure transmitters in other running states.

Description

Technical Field

[0001] The invention relates to the technical field of differential pressure transmitter detection, and in particular to an operation detection method and system for a differential pressure transmitter. Background Art

[0002] Existing differential pressure transmitter monitoring systems are usually limited to simple signal acquisition and threshold alarms, lacking in-depth analysis of equipment operating status and early identification of potential faults. These systems often ignore the rich operating characteristic information generated by differential pressure transmitters during operation, resulting in limitations in equipment performance evaluation and fault diagnosis. In addition, the current monitoring system lacks effective data processing methods and fault classification mechanisms when processing differential pressure transmitter output signals, making it difficult for operation and maintenance personnel to quickly and accurately identify and handle equipment failures. Summary of the invention

[0003] In order to solve the above problems, an object of the present invention is to provide an operation detection method and system for a differential pressure transmitter.

[0004] The object of the present invention can be achieved by the following technical solution: A method for detecting the operation of a differential pressure transmitter, comprising the following steps: Step S1: collecting the output terminal signal of the differential pressure transmitter, and processing the output terminal signal to generate a corresponding output signal stream; Step S2: extracting features from the output signal stream, thereby extracting the operating feature information of the differential pressure transmitter, assigning confidence weights to the corresponding differential pressure transmitters according to the operating feature information, thereby generating operating coefficients of the corresponding differential pressure transmitters; Step S3: performing corresponding state mode detection according to the operation coefficient of each differential pressure transmitter, and then detecting the respective operation state of each differential pressure transmitter; Step S4: Fault classification is performed on differential pressure transmitters with abnormal operating status, and relevant operation and maintenance personnel are arranged to perform maintenance, and periodic inspection is performed on differential pressure transmitters in other operating statuses.

[0005] Furthermore, the process of collecting the output terminal signal of the differential pressure transmitter and processing the output terminal signal to generate a corresponding output signal stream includes: A plurality of differential pressure transmitters are numbered, and the numbers are recorded as i, where i=1, 2, 3, ..., n, and n is a natural number greater than 0. Signal acquisition parameters corresponding to each differential pressure transmitter are set, and the signal acquisition parameters include signal acquisition frequency, signal acquisition duration, and signal acquisition rate; A data acquisition card is provided for each differential pressure transmitter, and the data acquisition card of the differential pressure transmitter is configured according to the signal acquisition parameters, and the output terminal signal of each differential pressure transmitter is collected through the data acquisition card; When the data acquisition card acquires the output signal of the corresponding differential pressure transmitter, the actual signal acquisition time of each differential pressure transmitter is obtained, and an acquisition coefficient is generated according to the set signal acquisition time and the actual signal acquisition time; The acquisition coefficient is recorded as τ, and the acquisition behavior determination threshold is set and recorded as η, 0<η<1; Set the numerical fluctuation range corresponding to the signal acquisition frequency and signal acquisition rate; When τ<η, it is determined that the data acquisition card's acquisition of the output terminal signal of the corresponding differential pressure transmitter is an invalid acquisition behavior; When τ≥η, it is determined whether the signal acquisition frequency and the signal acquisition rate are within their respective numerical fluctuation ranges when the data acquisition card acquires the output signal. If so, it indicates that it is a valid acquisition behavior, otherwise, it indicates that it is an invalid acquisition behavior. The output terminal signal collected by each differential pressure transmitter is subjected to signal filtering, signal amplification and signal conversion, and then the output terminal signal is converted into a corresponding output signal stream.

[0006] Furthermore, the process of extracting the characteristics of the output signal stream and then extracting the operating characteristic information of the differential pressure transmitter includes: Divide the output signal stream into several time point signal streams according to the timestamp; Set several time segments, divide all time point signal streams whose timestamps are in the same time segment into a group of time period signal streams, perform feature extraction on each group of time period signal streams, and then extract the signal amplitude, signal frequency and signal phase corresponding to the output signal stream in each time segment, and integrate the signal amplitude, signal frequency and signal phase in the same time segment as the operation feature information in the current time segment; The operation characteristic information corresponding to the output signal streams of the differential pressure transmitter in all time segments is integrated and then used as the operation characteristic information corresponding to the differential pressure transmitter in the entire working process.

[0007] Furthermore, the process of assigning confidence weights to corresponding differential pressure transmitters according to the operating characteristic information and then generating operating coefficients of the corresponding differential pressure transmitters includes: Setting a determination condition set, the determination condition set is used to determine the stability of the output signal flow of the differential pressure transmitter in each time period included in the operation characteristic information; If the operation characteristic information of the output signal flow of the differential pressure transmitter in a certain time segment does not meet the judgment condition set, it is determined that the output signal flow in the corresponding time segment is unstable; if the operation characteristic information of the output signal flow in a certain time segment meets the judgment condition set, the output signal flow in the corresponding time segment is stable; Count the number of conditions that the output signal flow meets in the determination condition set in each time segment, the number of conditions that are met is an integer between 0 and 3, and assign the confidence weight of the output signal flow in the corresponding time segment according to the number of conditions that are met, and the confidence weight is 0 and 1; When the number of conditions that are satisfied is 0 or 1, the confidence weight assigned to the corresponding time segment is 0; when the number of conditions that are satisfied is 2 or 3, the confidence weight assigned to the corresponding time segment is 1; According to the confidence weight assigned to the output signal flow in each time segment and the total number of time segments corresponding to the output signal flow, the operating coefficient of the differential pressure transmitter corresponding to the output signal flow is generated, and the operating coefficient corresponding to the differential pressure transmitter numbered i is recorded as Run[i].

[0008] Furthermore, the process of performing corresponding state mode detection according to the operation coefficient of each differential pressure transmitter and then detecting the respective operation state of each differential pressure transmitter includes: Set the coefficient settling interval for the differential pressure transmitter to perform state mode detection; The coefficient settlement interval includes a low confidence interval and a high confidence interval, and the low confidence interval and the high confidence interval are respectively denoted as Ω 低置信 and Ω 高置信 ; When Run[i]∈Ω 低置信 When the operating state of the corresponding differential pressure transmitter is detected to be abnormal; When Run[i]∈Ω 高置信 When the corresponding differential pressure transmitter is detected to be in normal operating state.

[0009] Furthermore, the process of classifying the faults of the differential pressure transmitter with abnormal operating status and arranging relevant operation and maintenance personnel to perform maintenance includes: Obtaining historical operation data corresponding to the differential pressure transmitter at historical time, and building a corresponding operation fault library according to the historical operation data when the differential pressure transmitter is in a fault state, wherein the operation fault library stores characteristic data corresponding to different fault types of the differential pressure transmitter; Export the operation data corresponding to all differential pressure transmitters with abnormal operation status, generate corresponding data sets to be tested and input them into the operation fault library, which will match the data sets to be tested with all characteristic data; When the similarity between the operating data included in the data set to be inspected and a certain characteristic data in the operating fault library exceeds a preset matching threshold, the fault type corresponding to the matched characteristic data is marked on the differential pressure transmitter corresponding to the corresponding operating data; The operation fault library matches the fault type of the differential pressure transmitter corresponding to each operation data, creates a maintenance auxiliary log corresponding to each differential pressure transmitter with abnormal operation status, and pushes it to the terminal equipment of the relevant operation and maintenance personnel. After the relevant operation and maintenance personnel receive and refer to the maintenance auxiliary log, they arrange the maintenance of the corresponding differential pressure transmitter and record all the operation information of the maintenance in the maintenance auxiliary log.

[0010] Furthermore, the process of periodically detecting the differential pressure transmitter in other operating states includes: Perform periodic inspections on differential pressure transmitters that are in normal operating condition; Set the detection period, which consists of several sub-detection periods; In each sub-detection period, an output signal test is performed on the differential pressure transmitter in normal operation to determine whether the signal fluctuation of the output terminal signal of the differential pressure transmitter is within a preset value fluctuation range. If so, no operation is performed; if not, an abnormal response is generated; Count the number of sub-detection periods in which the differential pressure transmitter generates abnormal responses in each normal operating state. If the number exceeds 1 / 3 or more of the total number of sub-detection periods in the corresponding detection cycle, it is determined that the current differential pressure transmitter is accompanied by a potential fault. Otherwise, it is determined that the current differential pressure transmitter is continuously in a normal operating state. When the differential pressure transmitter is accompanied by a potential fault, a standard pressure source device is used to calibrate the current differential pressure transmitter. When the differential pressure transmitter continues to be in normal operation, a next detection cycle for periodic detection of the differential pressure transmitter is set.

[0011] Further, an operation detection system for a differential pressure transmitter, the system comprising: The signal acquisition module is used to collect the output terminal signal of the differential pressure transmitter, and process the output terminal signal to generate a corresponding output signal stream; A feature extraction module is used to extract features from the output signal stream, thereby extracting the operating feature information of the differential pressure transmitter, assigning confidence weights to the corresponding differential pressure transmitter according to the operating feature information, and thereby generating an operating coefficient of the corresponding differential pressure transmitter; A state detection module is used to perform corresponding state mode detection according to the operation coefficient of each differential pressure transmitter, and then detect the respective operation state of each differential pressure transmitter; The execution module classifies the faults of differential pressure transmitters with abnormal operating status, arranges relevant operation and maintenance personnel to carry out maintenance, and performs periodic inspections on differential pressure transmitters in other operating states.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. Collect the output signal of the differential pressure transmitter, generate an output signal stream after processing, perform feature extraction on the output signal stream to extract the operating characteristic information of the differential pressure transmitter, assign confidence weights to the corresponding differential pressure transmitter according to the operating characteristic information, and then generate the operating coefficient of the corresponding differential pressure transmitter. Perform corresponding state mode detection according to the operating coefficient of each differential pressure transmitter, and then detect the operating status of each differential pressure transmitter, providing a reliable data basis for subsequent fault diagnosis of the differential pressure transmitter and improving the evaluation accuracy of the operating status of the differential pressure transmitter.

[0013] 2. Classify the faults of differential pressure transmitters with abnormal operating status, arrange relevant operation and maintenance personnel to carry out maintenance, and perform periodic inspections on differential pressure transmitters in other operating statuses. On the one hand, timely maintenance is carried out on differential pressure transmitters with abnormalities to ensure the normal operation of differential pressure transmitters. On the other hand, periodic inspections are used to pay attention to differential pressure transmitters in normal operating status, so as to timely discover early potential faults of differential pressure transmitters and intervene. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0015] like Figure 1 As shown, a method for detecting operation of a differential pressure transmitter comprises the following steps: Step S1: collecting the output terminal signal of the differential pressure transmitter, and processing the output terminal signal to generate a corresponding output signal stream; Step S2: extracting features from the output signal stream, thereby extracting the operating feature information of the differential pressure transmitter, assigning confidence weights to the corresponding differential pressure transmitters according to the operating feature information, thereby generating operating coefficients of the corresponding differential pressure transmitters; Step S3: performing corresponding state mode detection according to the operation coefficient of each differential pressure transmitter, and then detecting the respective operation state of each differential pressure transmitter; Step S4: Fault classification is performed on differential pressure transmitters with abnormal operating status, and relevant operation and maintenance personnel are arranged to perform maintenance, and periodic inspection is performed on differential pressure transmitters in other operating statuses.

[0016] It should be further explained that, in a specific implementation process, the process of collecting the output terminal signal of the differential pressure transmitter and processing the output terminal signal to generate a corresponding output signal stream includes: A number of differential pressure transmitters are numbered and the number is recorded as i, i=1, 2, 3, ..., n, where n is a natural number greater than 0, and the signal acquisition parameters corresponding to each differential pressure transmitter are set, and the signal acquisition parameters include signal acquisition frequency, signal acquisition duration and signal acquisition rate; A data acquisition card is provided for each differential pressure transmitter, and the data acquisition card of the corresponding differential pressure transmitter is configured according to the signal acquisition parameters, and the signal of the output end of each differential pressure transmitter is collected through the data acquisition card; When the data acquisition card acquires the output signal of the corresponding differential pressure transmitter, the actual signal acquisition time of each differential pressure transmitter is obtained, and the corresponding acquisition coefficient is generated according to the set signal acquisition time and the actual signal acquisition time; The acquisition coefficient is recorded as τ, then τ is expressed as follows: ; Wherein, T represents the actual signal acquisition time, and T` represents the signal acquisition time corresponding to the set signal acquisition parameters; Set a collection behavior determination threshold, and record the collection behavior determination threshold as η, 0<η<1; Set the numerical fluctuation range corresponding to the signal acquisition frequency and signal acquisition rate; When τ<η, it is determined that the data acquisition card's acquisition of the output terminal signal of the corresponding differential pressure transmitter is an invalid acquisition behavior; When τ≥η, it is determined whether the signal acquisition frequency and the signal acquisition rate are within their respective numerical fluctuation ranges when the data acquisition card acquires the output signal. If so, it indicates that it is a valid acquisition behavior, otherwise, it indicates that it is an invalid acquisition behavior. The output signal collected by each differential pressure transmitter is subjected to signal filtering, signal amplification and signal conversion, and then the output signal is converted into a corresponding output signal stream, and the serial number of the differential pressure transmitter is used as an index certificate of the corresponding output signal stream.

[0017] It should be further explained that, in the specific implementation process, the process of extracting the characteristics of the output signal stream and then extracting the operating characteristic information of the differential pressure transmitter includes: Divide the output signal stream into several time point signal streams according to the timestamp; Set several time segments, divide all time point signal streams with timestamps in the same time segment into a group of time period signal streams, perform feature extraction on each group of time period signal streams, and then extract the signal amplitude, signal frequency and signal phase corresponding to the output signal stream in each time segment; Integrate the signal amplitude, signal frequency and signal phase in the same time segment in the output signal stream as the operation characteristic information in the current time segment, and identify the operation characteristic information in the current time segment as Qd[t], where t is a time segment of the output signal stream; Qd[t]={A[i] 信号 , f[i] 信号 ,ψ[i] 信号}; Among them, A[i] 信号 represents the signal amplitude of the corresponding output signal stream in time segment t, f[i] 信号 represents the signal frequency of the corresponding output signal flow in time segment t, ψ[i] 信号 Indicates the signal phase of the corresponding output signal flow in time segment t; The operation characteristic information corresponding to the output signal streams of the differential pressure transmitter in all time segments is integrated and then used as the operation characteristic information corresponding to the differential pressure transmitter in the entire working process.

[0018] It should be further explained that, in the specific implementation process, the process of assigning confidence weights to the corresponding differential pressure transmitters according to the operating characteristic information and then generating the operating coefficients of the corresponding differential pressure transmitters includes: Setting a determination condition set, the determination condition set is used to determine the stability of the output signal flow of the differential pressure transmitter in each time period corresponding to the operation characteristic information; The determination condition set includes a first determination condition, a second determination condition and a third determination condition; The first judgment condition is the amplitude safety value range corresponding to the signal amplitude; The second determination condition is the frequency safety value range corresponding to the signal frequency; The third determination condition is the phase safety value range corresponding to the signal phase; If the operation characteristic information of the output signal flow of the differential pressure transmitter in a certain time segment does not meet the judgment condition set, it is determined that the output signal flow in the corresponding time segment is unstable; if the operation characteristic information of the output signal flow in a certain time segment meets the judgment condition set, the output signal flow in the corresponding time segment is stable; The specific determination is: When the signal amplitude is not within the amplitude safety value range, the first determination condition is not met, otherwise, the first determination condition is met; When the signal frequency is not within the frequency safety value range, the second determination condition is not satisfied, otherwise, the second determination condition is satisfied; When the signal phase is not within the phase safety value range, the third determination condition is not satisfied, otherwise, the third determination condition is satisfied; When any of the first determination condition, the second determination condition and the third determination condition is not satisfied in a certain time segment, the operation characteristic information of the output signal flow in the corresponding time segment does not meet the determination condition set, otherwise, it meets; Count the number of conditions that are satisfied in the determination condition set for the output signal flow in each time segment, where the number of satisfied conditions is an integer between 0 and 3, and assign a confidence weight to the output signal flow in the corresponding time segment according to the number of satisfied conditions; The confidence weights assigned are 0 and 1; When the number of conditions in the judgment condition set is 0 or 1, the confidence weight assigned to the corresponding time segment is 0; when the number of conditions is 2 or 3, the confidence weight assigned to the corresponding time segment is 1; According to the confidence weight assigned to the output signal flow in each time segment and the total number of time segments corresponding to the output signal flow, the operation coefficient of the differential pressure transmitter corresponding to the output signal flow is generated, and the operation coefficient corresponding to the differential pressure transmitter numbered i is recorded as Run[i]; ; Wherein, t=t1, t2, t3, ... tn represents a number of time segments of the output signal stream, QZ[t] is the confidence weight corresponding to the time segment, and N is the total number of time segments corresponding to the output signal stream.

[0019] Among them, the operating coefficient of the differential pressure transmitter is numerically: 0<Run[i]<1.

[0020] It should be further explained that, in the specific implementation process, the process of performing corresponding state mode detection according to the operation coefficient of each differential pressure transmitter and then detecting the respective operation state of each differential pressure transmitter includes: Set the coefficient settling interval for the differential pressure transmitter to perform state mode detection; The coefficient settlement interval includes a low confidence interval and a high confidence interval, and the low confidence interval and the high confidence interval are respectively denoted as Ω 低置信 and Ω 高置信 , where Ω 低置信 =(0,0.6],Ω 高置信 =(0.6, 1); When Run[i]∈Ω 低置信 When the operating state of the corresponding differential pressure transmitter is detected to be abnormal; When Run[i]∈Ω 高置信 When the corresponding differential pressure transmitter is detected to be in normal operating state.

[0021] It should be further explained that, in the specific implementation process, the process of classifying the faults of the differential pressure transmitter with abnormal operating status and arranging relevant operation and maintenance personnel to carry out maintenance includes: Obtaining historical operation data corresponding to the differential pressure transmitter at historical time, and building a corresponding operation fault library according to the historical operation data when the differential pressure transmitter is in a fault state, wherein the operation fault library stores characteristic data corresponding to different fault types of the differential pressure transmitter; Export the operation data corresponding to all differential pressure transmitters with abnormal operation status, generate corresponding data sets to be tested, and input the data sets to be tested into the operation fault library, which matches the data sets to be tested with all characteristic data; The specific content of the match between the dataset to be tested and all feature data is as follows: Divide the current data set to be inspected into a number of operation data to be matched according to the number of the differential pressure transmitter, and set the matching priorities of the operation data to be matched, wherein the matching priorities are set in ascending order according to the timestamps corresponding to the operation data in the data set to be inspected; That is, the matching priority is inversely proportional to the corresponding timestamp of the running data; The larger the timestamp of the running data, the lower its corresponding matching priority; The smaller the timestamp of the running data is, the higher its corresponding matching priority is; When the operation fault library receives the operation data, it splits the operation data into several data mapping fields, and selects characteristic data from the operation fault library in turn to split it into several data matching fields, performs field comparison between several data mapping fields and several data matching fields, and then obtains the similarity between the operation data corresponding to a differential pressure transmitter in the data set to be inspected and a characteristic data in the operation fault library; Let the similarity be r, then r = N1 / N2; Wherein, N1 is the number of data mapping fields in the running data that are completely consistent with the data matching fields in the feature data, N2 is the total number of data mapping fields in the running data, N1 and N2 are both integers greater than 0, and N1<N2; When the similarity between the operating data included in the data set to be inspected and a certain characteristic data in the operating fault library exceeds a preset matching threshold, the fault type corresponding to the matched characteristic data is marked on the differential pressure transmitter corresponding to the corresponding operating data; The operation fault library matches the fault type of the differential pressure transmitter corresponding to each operation data, and then completes the fault classification of several differential pressure transmitters, creates a maintenance auxiliary log corresponding to each differential pressure transmitter with an abnormal operation status, and pushes the maintenance auxiliary log to the terminal device of the relevant operation and maintenance personnel. After the relevant operation and maintenance personnel receive the maintenance auxiliary log, they arrange the maintenance of the corresponding differential pressure transmitter with reference to the maintenance auxiliary log, and record all the operation information of the maintenance in the maintenance auxiliary log.

[0022] It should be noted that the matching threshold is changed and set by the personnel who maintain and operate the fault library according to actual conditions.

[0023] It should be further explained that, in the specific implementation process, the process of periodically detecting the differential pressure transmitter in other operating states includes: Perform periodic inspections on differential pressure transmitters that are in normal operating condition; Set the detection period, which consists of several sub-detection periods; In each sub-detection period, an output signal test is performed on the differential pressure transmitter in normal operation to determine whether the signal fluctuation of the output terminal signal of the differential pressure transmitter is within a preset value fluctuation range. If so, no operation is performed; if not, an abnormal response is generated; Count the number of sub-detection periods in which each differential pressure transmitter in normal operation generates an abnormal response. If the number exceeds 1 / 3 or more of the total number of sub-detection periods in the corresponding detection cycle, it is determined that the current differential pressure transmitter is accompanied by a potential fault. Otherwise, it is determined that the current differential pressure transmitter is continuously in normal operation. When the differential pressure transmitter is accompanied by potential failure, use the standard pressure source device to calibrate the current differential pressure transmitter and unify the transmission pressure of the current differential pressure transmitter to the pressure value corresponding to the standard pressure source device; When the differential pressure transmitter is continuously in a normal operating state, a next detection cycle for periodically detecting the differential pressure transmitter is set.

[0024] The present invention also provides an operation detection system for a differential pressure transmitter, the system comprising: The signal acquisition module is used to collect the output terminal signal of the differential pressure transmitter, and process the output terminal signal to generate a corresponding output signal stream; A feature extraction module is used to extract features from the output signal stream, thereby extracting the operating feature information of the differential pressure transmitter, assigning confidence weights to the corresponding differential pressure transmitter according to the operating feature information, and thereby generating an operating coefficient of the corresponding differential pressure transmitter; A state detection module is used to perform corresponding state mode detection according to the operation coefficient of each differential pressure transmitter, and then detect the respective operation state of each differential pressure transmitter; The execution module classifies the faults of differential pressure transmitters with abnormal operating status, arranges relevant operation and maintenance personnel to carry out maintenance, and performs periodic inspections on differential pressure transmitters in other operating states.

[0025] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A method for detecting operation of a differential pressure transmitter, characterized in that: The following steps are involved: Step S1: collecting the output terminal signal of the differential pressure transmitter, and processing the output terminal signal to generate a corresponding output signal stream; Step S2: extracting features from the output signal stream, thereby extracting the operating feature information of the differential pressure transmitter, assigning confidence weights to the corresponding differential pressure transmitters according to the operating feature information, thereby generating operating coefficients of the corresponding differential pressure transmitters; Step S3: performing corresponding state mode detection according to the operation coefficient of each differential pressure transmitter, and then detecting the respective operation state of each differential pressure transmitter; Step S4: Fault classification is performed on differential pressure transmitters with abnormal operating status, and relevant operation and maintenance personnel are arranged to perform maintenance, and periodic inspection is performed on differential pressure transmitters in other operating statuses.

2. The operation detection method for a differential pressure transmitter according to claim 1, characterized in that: The process of collecting the output signal of the differential pressure transmitter and processing the output signal to generate the corresponding output signal stream includes: A plurality of differential pressure transmitters are numbered, and the numbers are recorded as i, where i=1, 2, 3, ..., n, and n is a natural number greater than 0. Signal acquisition parameters corresponding to each differential pressure transmitter are set, and the signal acquisition parameters include signal acquisition frequency, signal acquisition duration, and signal acquisition rate; A data acquisition card is provided for each differential pressure transmitter, and the data acquisition card of the differential pressure transmitter is configured according to the signal acquisition parameters, and the output terminal signal of each differential pressure transmitter is collected through the data acquisition card; When the data acquisition card acquires the output signal of the corresponding differential pressure transmitter, the actual signal acquisition time of each differential pressure transmitter is obtained, and an acquisition coefficient is generated according to the set signal acquisition time and the actual signal acquisition time; The acquisition coefficient is recorded as τ, and the acquisition behavior determination threshold is set and recorded as η, 0<η<1; Set the numerical fluctuation range corresponding to the signal acquisition frequency and signal acquisition rate; When τ<η, it is determined that the data acquisition card's acquisition of the output terminal signal of the corresponding differential pressure transmitter is an invalid acquisition behavior; When τ≥η, it is determined whether the signal acquisition frequency and the signal acquisition rate are within their respective numerical fluctuation ranges when the data acquisition card acquires the output signal. If so, it indicates that it is a valid acquisition behavior, otherwise, it indicates that it is an invalid acquisition behavior. The output terminal signal collected by each differential pressure transmitter is subjected to signal filtering, signal amplification and signal conversion, and then the output terminal signal is converted into a corresponding output signal stream.

3. The operation detection method for a differential pressure transmitter according to claim 2, characterized in that: The process of extracting the characteristics of the output signal stream and then extracting the operating characteristic information of the differential pressure transmitter includes: Divide the output signal stream into several time point signal streams according to the timestamp; Set several time segments, divide all time point signal streams whose timestamps are in the same time segment into a group of time period signal streams, perform feature extraction on each group of time period signal streams, and then extract the signal amplitude, signal frequency and signal phase corresponding to the output signal stream in each time segment, and integrate the signal amplitude, signal frequency and signal phase in the same time segment as the operation feature information in the current time segment; The operation characteristic information corresponding to the output signal streams of the differential pressure transmitter in all time segments is integrated and then used as the operation characteristic information corresponding to the differential pressure transmitter in the entire working process.

4. The operation detection method for a differential pressure transmitter according to claim 3, characterized in that: The process of assigning confidence weights to corresponding differential pressure transmitters according to operating characteristic information and then generating operating coefficients of corresponding differential pressure transmitters includes: Setting a determination condition set, the determination condition set is used to determine the stability of the output signal flow of the differential pressure transmitter in each time period included in the operation characteristic information; If the operation characteristic information of the output signal flow of the differential pressure transmitter in a certain time segment does not meet the judgment condition set, it is determined that the output signal flow in the corresponding time segment is unstable; if the operation characteristic information of the output signal flow in a certain time segment meets the judgment condition set, the output signal flow in the corresponding time segment is stable; Count the number of conditions that the output signal flow meets in the determination condition set in each time segment, the number of conditions that are met is an integer between 0 and 3, and assign the confidence weight of the output signal flow in the corresponding time segment according to the number of conditions that are met, and the confidence weight is 0 and 1; When the number of conditions that are satisfied is 0 or 1, the confidence weight assigned to the corresponding time segment is 0; when the number of conditions that are satisfied is 2 or 3, the confidence weight assigned to the corresponding time segment is 1; According to the confidence weight assigned to the output signal flow in each time segment and the total number of time segments corresponding to the output signal flow, the operating coefficient of the differential pressure transmitter corresponding to the output signal flow is generated, and the operating coefficient corresponding to the differential pressure transmitter numbered i is recorded as Run[i].

5. The operation detection method for a differential pressure transmitter according to claim 4, characterized in that: The process of performing corresponding state mode detection according to the operation coefficient of each differential pressure transmitter and then detecting the respective operation state of each differential pressure transmitter includes: Set the coefficient settling interval for the differential pressure transmitter to perform state mode detection; The coefficient settlement interval includes a low confidence interval and a high confidence interval, and the low confidence interval and the high confidence interval are respectively recorded as Ω low confidence and Ω high confidence; When Run[i]∈Ω 低置信 When the operating state of the corresponding differential pressure transmitter is detected to be abnormal; When Run[i]∈Ω 高置信 When the corresponding differential pressure transmitter is detected to be in normal operating state.

6. The operation detection method for a differential pressure transmitter according to claim 5, characterized in that: The process of classifying the faults of differential pressure transmitters with abnormal operating status and arranging relevant operation and maintenance personnel to perform maintenance includes: Obtaining historical operation data corresponding to the differential pressure transmitter at historical time, and building a corresponding operation fault library according to the historical operation data when the differential pressure transmitter is in a fault state, wherein the operation fault library stores characteristic data corresponding to different fault types of the differential pressure transmitter; Export the operation data corresponding to all differential pressure transmitters with abnormal operation status, generate corresponding data sets to be tested and input them into the operation fault library, which will match the data sets to be tested with all characteristic data; When the similarity between the operating data included in the data set to be inspected and a certain characteristic data in the operating fault library exceeds a preset matching threshold, the fault type corresponding to the matched characteristic data is marked on the differential pressure transmitter corresponding to the corresponding operating data; The operation fault library matches the fault type of the differential pressure transmitter corresponding to each operation data, creates a maintenance auxiliary log corresponding to each differential pressure transmitter with abnormal operation status, and pushes it to the terminal equipment of the relevant operation and maintenance personnel. After the relevant operation and maintenance personnel receive and refer to the maintenance auxiliary log, they arrange the maintenance of the corresponding differential pressure transmitter and record all the operation information of the maintenance in the maintenance auxiliary log.

7. The operation detection method for a differential pressure transmitter according to claim 6, characterized in that: The process of periodically testing a differential pressure transmitter in other operating states includes: Perform periodic inspections on differential pressure transmitters that are in normal operating condition; Set the detection period, which consists of several sub-detection periods; In each sub-detection period, an output signal test is performed on the differential pressure transmitter in normal operation to determine whether the signal fluctuation of the output terminal signal of the differential pressure transmitter is within a preset value fluctuation range. If so, no operation is performed; if not, an abnormal response is generated; Count the number of sub-detection periods in which the differential pressure transmitter generates abnormal responses in each normal operating state. If the number exceeds 1 / 3 or more of the total number of sub-detection periods in the corresponding detection cycle, it is determined that the current differential pressure transmitter is accompanied by a potential fault. Otherwise, it is determined that the current differential pressure transmitter is continuously in a normal operating state. When the differential pressure transmitter is accompanied by a potential fault, a standard pressure source device is used to calibrate the current differential pressure transmitter. When the differential pressure transmitter continues to be in normal operation, a next detection cycle for periodic detection of the differential pressure transmitter is set.

8. An operation detection system for a differential pressure transmitter, used to implement the operation detection method according to any one of claims 1 to 7, characterized in that: The system includes: The signal acquisition module is used to collect the output terminal signal of the differential pressure transmitter, and process the output terminal signal to generate a corresponding output signal stream; A feature extraction module is used to extract features from the output signal stream, thereby extracting the operating feature information of the differential pressure transmitter, assigning confidence weights to the corresponding differential pressure transmitter according to the operating feature information, and thereby generating an operating coefficient of the corresponding differential pressure transmitter; The status detection module is used to perform corresponding status mode detection according to the operating coefficient of each differential pressure transmitter, and then detect the operating status of each differential pressure transmitter; the execution module classifies the faults of differential pressure transmitters with abnormal operating status, arranges relevant operation and maintenance personnel to carry out maintenance, and performs periodic detection on differential pressure transmitters in other operating states.

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