A method and system for run detection for a differential pressure transmitter

Abstract

The application discloses a kind of operation detection method and system for differential pressure transmitter, it is related to differential pressure transmitter detection technical field, the output end signal of differential pressure transmitter is collected, and the output end signal is handled to generate corresponding output signal stream, the feature extraction is carried out to output signal stream, and then the operation characteristic information of differential pressure transmitter is extracted, according to operation characteristic information, the confidence weight assignment of corresponding differential pressure transmitter is carried out, and then the operation coefficient of corresponding differential pressure transmitter is generated, according to the operation coefficient of each differential pressure transmitter, corresponding state mode detection is carried out, and then the operation state of each differential pressure transmitter is detected, the fault classification is carried out to the differential pressure transmitter with abnormal operation state, and relevant operation and maintenance personnel are arranged to overhaul, the differential pressure transmitter in other operation state is periodically detected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of differential pressure transmitter detection, and particularly relates to a running detection method and system for a differential pressure transmitter. BACKGROUND

[0002] The existing differential pressure transmitter monitoring system is usually limited to simple signal acquisition and threshold alarm, lacks in-depth analysis of the running state of the equipment and early identification of potential faults, and often ignores the rich running feature information generated by the differential pressure transmitter in the running process, resulting in limitations in device performance evaluation and fault diagnosis. In addition, the current monitoring system lacks effective data processing methods and fault classification mechanisms when processing the output signal of the differential pressure transmitter, making it difficult for operation and maintenance personnel to quickly and accurately identify and handle equipment faults. SUMMARY

[0003] In order to solve the above problems, the purpose of the present application is to provide a running detection method and system for a differential pressure transmitter.

[0004] The purpose of the present application can be achieved by the following technical solutions: a running detection method for a differential pressure transmitter, comprising the following steps:

[0005] Step S1: collecting the output end signal of the differential pressure transmitter and processing the output end signal to generate a corresponding output signal stream;

[0006] Step S2: extracting features from the output signal stream, and then extracting the running feature information of the differential pressure transmitter, assigning a confidence weight to the corresponding differential pressure transmitter according to the running feature information, and then generating a running coefficient corresponding to the differential pressure transmitter;

[0007] Step S3: detecting the running state of each differential pressure transmitter according to the running coefficient of each differential pressure transmitter;

[0008] Step S4: classifying the faults of the differential pressure transmitter whose running state is abnormal, and arranging relevant operation and maintenance personnel to repair, and periodically detecting the differential pressure transmitter in other running states.

[0009] Further, the process of collecting the output end signal of the differential pressure transmitter and processing the output end signal to generate a corresponding output signal stream comprises:

[0010] A plurality of differential pressure transmitters are numbered, and the number is denoted as i, i=1, 2, 3, …, n, n is a natural number greater than 0, and each differential pressure transmitter is set with a corresponding signal acquisition parameter, including signal acquisition frequency, signal acquisition time length and signal acquisition rate;

[0011] A data acquisition card is set for each differential pressure transmitter, the data acquisition card of the differential pressure transmitter is configured according to the signal acquisition parameter, and the output end signal of each differential pressure transmitter is acquired through the data acquisition card;

[0012] When the data acquisition card acquires the output end signal of the corresponding differential pressure transmitter, the signal acquisition time length in the actual situation of each differential pressure transmitter is acquired, and the acquisition coefficient is generated according to the set signal acquisition time length and the signal acquisition time length in the actual situation;

[0013] The acquisition coefficient is denoted as τ, the acquisition behavior judgment threshold is set and denoted as η, and 0 < η < 1;

[0014] The signal acquisition frequency and the signal acquisition rate respectively correspond to a numerical fluctuation range;

[0015] When τ < η, it is judged that the acquisition of the output end signal of the corresponding differential pressure transmitter by the data acquisition card is invalid acquisition behavior;

[0016] When τ ≥ η, it is judged whether the signal acquisition frequency and the signal acquisition rate in the actual situation are in the respective numerical fluctuation range when the data acquisition card acquires the output end signal, if yes, it is an effective acquisition behavior, otherwise, it is an invalid acquisition behavior;

[0017] The output end signal collected for each differential pressure transmitter is subjected to signal filtering, signal amplification and signal conversion, and then the output end signal is converted into a corresponding output signal stream.

[0018] Further, the process of extracting the running characteristic information of the differential pressure transmitter from the output signal stream includes:

[0019] The output signal stream is divided into a plurality of time point signal streams according to the time stamp;

[0020] A plurality of time sections are set, all time point signal streams with the same time stamp in the same time section are divided into a group of time section signal streams, and the characteristic of each group of time section signal streams is extracted, and then the signal amplitude, signal frequency and signal phase corresponding to the output signal stream in each time section are extracted, and the signal amplitude, signal frequency and signal phase in the same time section are integrated as the running characteristic information in the current time section;

[0021] The running characteristic information of the output signal stream of the differential pressure transmitter in all time sections is integrated, and then the running characteristic information corresponding to the entire working process of the differential pressure transmitter is generated.

[0022] Further, the process of assigning a confidence weight to the corresponding differential pressure transmitter according to the running characteristic information and generating the running coefficient of the corresponding differential pressure transmitter includes:

[0023] A set of determination conditions is set, which is used to determine the stability of the output signal flow of the differential pressure transmitter under each time segment included in the operation characteristic information;

[0024] If the operation characteristic information of the output signal flow of the differential pressure transmitter under a certain time segment does not meet the set of determination conditions, it is determined that the output signal flow under the corresponding time segment is unstable, and if the operation characteristic information of the output signal flow under a certain time segment meets the set of determination conditions, the output signal flow under the corresponding time segment is stable;

[0025] The number of conditions that meet the set of determination conditions is counted for the output signal flow under each time segment, and the number of conditions that meet the set of determination conditions is an integer between 0 and 3, and the confidence weight of the output signal flow under the corresponding time segment is assigned according to the number of conditions that meet the set of determination conditions, and the confidence weight is valued at 0 and 1;

[0026] When the number of conditions that meet the set of determination conditions is valued at 0 and 1, the confidence weight of the corresponding time segment is assigned to 0, and when the number of conditions that meet the set of determination conditions is valued at 2 and 3, the confidence weight of the corresponding time segment is assigned to 1;

[0027] According to the confidence weight assigned to the output signal flow under 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].

[0028] Further, the process of detecting the state mode of each differential pressure transmitter according to the operation coefficient of each differential pressure transmitter includes:

[0029] A coefficient determination interval for state mode detection of the differential pressure transmitter is set;

[0030] The coefficient determination 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 低置信 and Ω 高置信 ;

[0031] When Run[i]∈Ω 低置信 , it is detected that the operation state of the corresponding differential pressure transmitter is abnormal;

[0032] When Run[i]∈Ω 高置信 , it is detected that the operation state of the corresponding differential pressure transmitter is normal.

[0033] Further, the process of classifying the differential pressure transmitter with abnormal operation state and arranging relevant operation and maintenance personnel for maintenance includes:

[0034] acquire historical running data corresponding to the differential pressure transmitter at a historical time, and construct a corresponding running fault library according to the historical running data when the differential pressure transmitter is in a fault, the running fault library storing corresponding feature data when the differential pressure transmitter is in different fault types;

[0035] export the running data of the differential pressure transmitter in the current running state existing anomaly to generate a corresponding to-be-inspected data set, input the to-be-inspected data set into the running fault library, and match the to-be-inspected data set and all feature data in the running fault library;

[0036] when the similarity between the running data included in the to-be-inspected data set and a certain feature data in the running fault library exceeds a preset matching threshold, mark the fault type corresponding to the matched feature data to the differential pressure transmitter corresponding to the corresponding running data;

[0037] match the fault type of the differential pressure transmitter corresponding to each running data from the running fault library, create a maintenance assistance log corresponding to the differential pressure transmitter in the current running state existing anomaly, and push the maintenance assistance log to a terminal device of a related operation and maintenance personnel, so that the related operation and maintenance personnel receive and refer to the maintenance assistance log, arrange maintenance of the corresponding differential pressure transmitter, and record all operation information of the maintenance in the maintenance assistance log.

[0038] Further, the process of periodically detecting the differential pressure transmitter in other running states includes:

[0039] periodically detecting the differential pressure transmitter in a normal running state;

[0040] setting a detection period, the detection period being composed of a plurality of sub-detection periods;

[0041] in each sub-detection period, performing an output signal test on the differential pressure transmitter in a normal running state, judging whether the signal fluctuation of the output end signal of the differential pressure transmitter is within a preset numerical fluctuation range, if yes, not performing any operation, and if no, generating an abnormal response;

[0042] counting the number of sub-detection periods in which the differential pressure transmitter in each normal running state generates an abnormal response, if the number exceeds 1 / 3 or more of the total number of sub-detection periods in the corresponding detection period, determining that the current differential pressure transmitter is accompanied by a potential fault, otherwise, determining that the current differential pressure transmitter continuously stays in a normal running state;

[0043] when the differential pressure transmitter is accompanied by a potential fault, using a standard pressure source device to verify the current differential pressure transmitter, and when the differential pressure transmitter continuously stays in a normal running state, setting a next detection period for periodically detecting the differential pressure transmitter.

[0044] Furthermore, an operational monitoring system for a differential pressure transmitter, the system comprising:

[0045] The signal acquisition module is used to acquire the output signal of the differential pressure transmitter and process the output signal to generate the corresponding output signal stream.

[0046] The feature extraction module is used to extract features from the output signal stream, thereby extracting the operating feature information of the differential pressure transmitter. Based on the operating feature information, confidence weights are assigned to the corresponding differential pressure transmitters, thereby generating the operating coefficients of the corresponding differential pressure transmitters.

[0047] The status detection module is used to detect the corresponding status mode based on the operating coefficient of each differential pressure transmitter, thereby detecting the operating status of each differential pressure transmitter.

[0048] The execution module classifies differential pressure transmitters with abnormal operating status into fault categories and arranges relevant maintenance personnel to carry out repairs, while performing periodic tests on differential pressure transmitters in other operating states.

[0049] Compared with the prior art, the beneficial effects of the present invention are:

[0050] 1. Acquire the output signal of the differential pressure transmitter, process it to generate an output signal stream, extract features from the output signal stream to obtain the operating characteristic information of the differential pressure transmitter, assign confidence weights to the corresponding differential pressure transmitters based on the operating characteristic information, and generate the corresponding operating coefficients of the differential pressure transmitters. Based on the operating coefficients of each differential pressure transmitter, perform corresponding state mode detection to detect the operating status of each differential pressure transmitter. This provides a reliable data foundation for subsequent fault diagnosis of differential pressure transmitters and improves the accuracy of the assessment of the operating status of differential pressure transmitters.

[0051] 2. Differential pressure transmitters with abnormal operating conditions are classified into fault categories, and relevant maintenance personnel are arranged to carry out repairs. Differential pressure transmitters in other operating conditions are periodically inspected. On the one hand, timely repairs are carried out on differential pressure transmitters with abnormal conditions to ensure their normal operation. On the other hand, periodic inspections are used to monitor differential pressure transmitters in normal operating conditions to detect early potential faults and intervene in a timely manner. Attached Figure Description

[0052] Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0053] like Figure 1 As shown, a method for detecting the operation of a differential pressure transmitter includes the following steps:

[0054] Step S1: Collect the output signal of the differential pressure transmitter and process the output signal to generate a corresponding output signal stream;

[0055] Step S2: Feature extraction is performed on the output signal stream, and the operating feature information of the differential pressure transmitter is extracted, and the operating feature information is used to assign a confidence weight to the corresponding differential pressure transmitter, and an operating coefficient of the differential pressure transmitter is generated;

[0056] Step S3: According to the operating coefficient of each differential pressure transmitter, the corresponding state mode detection is performed, and the operating state of each differential pressure transmitter is detected;

[0057] Step S4: The differential pressure transmitter with abnormal operating state is classified and the related operation and maintenance personnel are arranged for maintenance, and the differential pressure transmitter in other operating state is periodically detected.

[0058] It should be further explained that in the specific implementation process, the process of collecting the output signal of the differential pressure transmitter and processing the output signal to generate a corresponding output signal stream includes:

[0059] A plurality of differential pressure transmitters are numbered, and the number is denoted as i, i.e. i = 1, 2, 3, …, n, where n is a natural number greater than 0, and each differential pressure transmitter is set to correspond to a signal collection parameter, including signal collection frequency, signal collection time and signal collection rate;

[0060] A data acquisition card is set for each differential pressure transmitter, and the data acquisition card of the corresponding differential pressure transmitter is configured according to the signal collection parameter, and the output signal of each differential pressure transmitter is collected through the data acquisition card;

[0061] When the data acquisition card collects the output signal of the corresponding differential pressure transmitter, the signal collection time under the actual condition of each differential pressure transmitter is obtained, and the corresponding collection coefficient is generated according to the set signal collection time and the signal collection time under the actual condition;

[0062] The collection coefficient is denoted as τ, and τ is expressed as follows:

[0063] ;

[0064] Where T represents the signal collection time under the actual condition, and T` represents the signal collection time corresponding to the set signal collection parameter;

[0065] A collection behavior judgment threshold is set, and the collection behavior judgment threshold is denoted as η, 0 < η < 1;

[0066] The signal collection frequency and the signal collection rate each correspond to a numerical fluctuation range;

[0067] When τ < η, the acquisition of the output signal of the corresponding differential pressure transmitter by the data acquisition card is determined to be an invalid acquisition behavior;

[0068] When τ≥η, it is determined whether the signal acquisition frequency and signal acquisition rate are within their respective value fluctuation ranges when the data acquisition card performs output signal acquisition. If so, it is considered a valid acquisition behavior; otherwise, it is considered an invalid acquisition behavior.

[0069] The output signals acquired by each differential pressure transmitter are filtered, amplified, and converted to form corresponding output signal streams. The differential pressure transmitter number is used as an index for the corresponding output signal stream.

[0070] It should be further explained that, in the specific implementation process, the process of extracting features from the output signal stream and then extracting the operating characteristic information of the differential pressure transmitter includes:

[0071] The output signal stream is divided into several time point signal streams according to the timestamp;

[0072] Several time segments are set up, and all time point signal streams with timestamps in the same time segment are divided into a group of time segment signal streams. Feature extraction is performed on each group of time segment signal streams, and then the signal amplitude, signal frequency and signal phase corresponding to the output signal stream in each time segment are extracted.

[0073] The signal amplitude, signal frequency and signal phase in the same time segment of the output signal stream are integrated as the operating characteristic information of the current time segment, and the operating characteristic information of the current time segment is identified as Qd[t], where t is a certain time segment of the output signal stream;

[0074] Qd[t]={A[i] 信号 f[i] 信号 ,ψ[i] 信号};

[0075] Among them, A[i] 信号 f[i] represents the signal amplitude of the output signal stream corresponding to time interval t. 信号 Let ψ[i] represent the signal frequency of the output signal stream corresponding to time interval t. 信号 This indicates the signal phase of the output signal stream corresponding to time interval t;

[0076] The operating characteristic information corresponding to the output signal stream of the differential pressure transmitter in all time periods is integrated and then used as the operating characteristic information of the differential pressure transmitter in the whole working process.

[0077] It needs to be further explained that, in the specific implementation process, the process of assigning confidence weight to the corresponding differential pressure transmitter according to the operation characteristic information, and then generating the operation coefficient of the corresponding differential pressure transmitter includes:

[0078] A set of determination conditions is set, which is used to determine the stability of the output signal flow of the differential pressure transmitter in each time segment included in the operation characteristic information;

[0079] The set of determination conditions includes a first determination condition, a second determination condition, and a third determination condition;

[0080] The first determination condition is a range of amplitude safety values corresponding to the signal amplitude;

[0081] The second determination condition is a range of frequency safety values corresponding to the signal frequency;

[0082] The third determination condition is a range of phase safety values corresponding to the signal phase;

[0083] If the operation characteristic information of the output signal flow of the differential pressure transmitter in a certain time segment does not meet the set of determination conditions, it is determined that the output signal flow in the corresponding time segment is unstable, and if the operation characteristic information of the output signal flow in a certain time segment meets the set of determination conditions, the output signal flow in the corresponding time segment is stable.

[0084] The specific determination is as follows:

[0085] When the signal amplitude is not in the range of amplitude safety values, the first determination condition is not established, otherwise, the first determination condition is established;

[0086] When the signal frequency is not in the range of frequency safety values, the second determination condition is not established, otherwise, the second determination condition is established;

[0087] When the signal phase is not in the range of phase safety values, the third determination condition is not established, otherwise, the third determination condition is established;

[0088] When any of the first determination condition, the second determination condition, and the third determination condition does not exist in a certain time segment, the operation characteristic information of the output signal flow in the corresponding time segment does not meet the set of determination conditions, otherwise, it meets;

[0089] The number of conditions established in the set of determination conditions is counted for the output signal flow in each time segment, and the value of the number of conditions established is an integer from 0 to 3. The confidence weight of the output signal flow in the corresponding time segment is assigned according to the number of conditions established.

[0090] The value of the assigned confidence weight is 0 and 1;

[0091] When the number of conditions in the condition set is 0 or 1, the confidence weight of the corresponding time section is assigned as 0, and when the number of conditions is 2 or 3, the confidence weight of the corresponding time section is assigned as 1;

[0092] According to the confidence weight assigned to each time section of the output signal stream and the total number of time sections corresponding to the output signal stream, the running coefficient of the differential pressure transmitter corresponding to the output signal stream is generated, and the running coefficient of the differential pressure transmitter corresponding to the output signal stream is recorded as Run[i];

[0093] ;

[0094] Where t=t1, t2, t3, ……tn represents several time sections of the output signal stream, QZ[t] is the confidence weight corresponding to the time section, and N is the total number of time sections corresponding to the output signal stream.

[0095] Where the running coefficient of the differential pressure transmitter has the value: 0

[0096] It should be further explained that in the specific implementation process, the process of detecting the running state of each differential pressure transmitter according to the running coefficient of each differential pressure transmitter includes:

[0097] Setting the coefficient falling interval of the differential pressure transmitter for state mode detection;

[0098] The coefficient falling 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 低置信 and 高置信 Where 低置信 =(0, 0.6], and 高置信 =(0.6, 1);

[0099] When Run[i]∈ 低置信 , it is detected that the running state of the corresponding differential pressure transmitter is abnormal;

[0100] When Run[i]∈ 高置信 , it is detected that the running state of the corresponding differential pressure transmitter is normal.

[0101] It should be further explained that in the specific implementation process, the process of classifying the differential pressure transmitter with abnormal running state and arranging relevant operation and maintenance personnel for maintenance includes:

[0102] Obtain historical running data corresponding to the differential pressure transmitter at a historical time, and construct a corresponding running fault library according to the historical running data when the differential pressure transmitter is in a fault state, wherein the running fault library stores feature data corresponding to different fault types of the differential pressure transmitter;

[0103] Export the running data of the differential pressure transmitter in the current all abnormal running states, generate a corresponding to-be-inspected data set, and input the to-be-inspected data set into the running fault library, so as to match the to-be-inspected data set and all feature data in the running fault library;

[0104] The specific content of the matching between the to-be-inspected data set and all feature data is as follows:

[0105] Divide the current to-be-inspected data set into a plurality of running data waiting for matching according to the number of the differential pressure transmitter, and set a plurality of matching priorities of the running data waiting for matching, wherein the matching priorities are set in the order from small to large according to the time stamps of the running data in the to-be-inspected data set;

[0106] That is, the matching priority and the time stamp of the running data are in an inverse proportional function relationship;

[0107] The greater the time stamp of the running data is, the lower the corresponding matching priority is;

[0108] The smaller the time stamp of the running data is, the higher the corresponding matching priority is;

[0109] When the running fault library receives the running data, the running data is split into a plurality of data mapping fields, and the feature data in the running fault library is split into a plurality of data matching fields in sequence, so as to compare the fields between the plurality of data mapping fields and the plurality of data matching fields, and further obtain the similarity between the corresponding running data of a differential pressure transmitter in the to-be-inspected data set and a feature data in the running fault library;

[0110] Let the similarity be r, then r=N1 / N2;

[0111] 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

[0112] When the similarity between the running data included in the to-be-inspected data set and a feature data in the running fault library exceeds a preset matching threshold, the fault type corresponding to the matched feature data is marked on the differential pressure transmitter corresponding to the corresponding running data;

[0113] The running data of each differential pressure transmitter is matched with the running fault library to determine the fault type of the differential pressure transmitter, thereby completing the fault classification of the differential pressure transmitter, creating a maintenance assistance log corresponding to the differential pressure transmitter in an abnormal running state, and pushing the maintenance assistance log to the terminal device of the relevant operation and maintenance personnel. After receiving the maintenance assistance log, the relevant operation and maintenance personnel can refer to the maintenance assistance log to arrange the maintenance of the corresponding differential pressure transmitter, and record all the operation information of the maintenance in the maintenance assistance log.

[0114] It should be noted that the matching threshold is changed and set by the personnel maintaining the running fault library according to the actual situation.

[0115] It should be further noted that in the specific implementation process, the periodic detection process of the differential pressure transmitter in other running states includes:

[0116] Periodically detecting the differential pressure transmitter in a normal running state;

[0117] Setting a detection period, which is composed of a plurality of sub-detection periods;

[0118] In each sub-detection period, the output signal of the differential pressure transmitter in a normal running state is tested to determine whether the signal fluctuation of the output signal of the differential pressure transmitter is within the preset numerical fluctuation range. If yes, no operation is performed, and if no, an abnormal response is generated;

[0119] The number of sub-detection periods in which the differential pressure transmitter in a normal running state generates an abnormal response is counted. If the number exceeds 1 / 3 or more of the total number of sub-detection periods in the corresponding detection period, 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 in a normal running state;

[0120] When the differential pressure transmitter is accompanied by a potential fault, a standard pressure source device is used to verify the current differential pressure transmitter, and the pressure of the differential pressure transmitter is unified to the pressure value corresponding to the standard pressure source device;

[0121] When the differential pressure transmitter is in a normal running state, the next detection period for periodically detecting the differential pressure transmitter is set.

[0122] The application also provides a running detection system for a differential pressure transmitter, which comprises:

[0123] A signal acquisition module for acquiring the output signal of the differential pressure transmitter and processing the output signal to generate a corresponding output signal stream;

[0124] The feature extraction module is configured to perform feature extraction on the output signal stream, to extract the operation characteristic information of the differential pressure transmitter, to assign a confidence weight to the corresponding differential pressure transmitter according to the operation characteristic information, and to generate an operation coefficient of the corresponding differential pressure transmitter;

[0125] The state detection module is configured to perform corresponding state mode detection according to the operation coefficient of each differential pressure transmitter, to detect the respective operation state of each differential pressure transmitter, and to generate a state detection result.

[0126] The execution module is configured to perform fault classification on the differential pressure transmitter with an abnormal operation state, to arrange relevant operation and maintenance personnel to perform maintenance, and to perform periodic detection on the differential pressure transmitter in other operation states.

[0127] The above embodiments are only used to illustrate the technical method of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical method of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical method of the present application.

Claims

1. A method for detecting the operation of a differential pressure transmitter, characterized in that, Includes the following steps: Step S1: Acquire the output signal of the differential pressure transmitter and process the output signal to generate the corresponding output signal stream; Step S2: Extract features from the output signal stream to extract the operating feature information of the differential pressure transmitter. Assign confidence weights to the corresponding differential pressure transmitters based on the operating feature information to generate the operating coefficients of the corresponding differential pressure transmitters. Step S3: Perform corresponding state mode detection based on the operating coefficient of each differential pressure transmitter, and then detect the operating status of each differential pressure transmitter. Step S4: Classify the differential pressure transmitters with abnormal operating status and arrange relevant maintenance personnel to carry out repairs. Perform periodic testing on differential pressure transmitters in other operating states. The process of acquiring the output signal of the differential pressure transmitter and processing the output signal to generate the corresponding output signal stream includes: Several differential pressure transmitters are numbered and denoted as i, i = 1, 2, 3, ..., n, where n is a natural number greater than 0. The signal acquisition parameters corresponding to each differential pressure transmitter are set, including signal acquisition frequency, signal acquisition duration and signal acquisition rate. Set up a data acquisition card for each differential pressure transmitter, configure the data acquisition card of the differential pressure transmitter according to the signal acquisition parameters, and acquire the output signal of each differential pressure transmitter through the data acquisition card; When the data acquisition card acquires the output signal of the corresponding differential pressure transmitter, it obtains the signal acquisition duration under the actual condition of each differential pressure transmitter and generates acquisition coefficients based on the set signal acquisition duration and the actual signal acquisition duration. The collection coefficient is denoted as Set the threshold for judging the data collection behavior, and record it as... , ; Set the numerical fluctuation range for the signal acquisition frequency and signal acquisition rate; when When this happens, the acquisition of the output signal of the corresponding differential pressure transmitter by the data acquisition card is determined to be an invalid acquisition action; when When the data acquisition card is acquiring output signals, it is determined whether the signal acquisition frequency and signal acquisition rate are within their respective value fluctuation ranges under actual conditions. If so, it indicates that the acquisition behavior is valid; otherwise, it indicates that the acquisition behavior is invalid. The output signals acquired by each differential pressure transmitter are filtered, amplified, and converted to the corresponding output signal stream. The output signal stream is divided into several time point signal streams according to the timestamp; Several time segments are set up, and all time point signal streams with timestamps in the same time segment are divided into a group of time period signal streams. Feature extraction is performed on each group of time period signal streams, and then the signal amplitude, signal frequency and signal phase corresponding to the output signal stream in each time segment are extracted. The signal amplitude, signal frequency and signal phase in the same time segment are integrated as the running feature information of the current time segment. The operating characteristic information corresponding to the output signal stream of the differential pressure transmitter in all time periods is integrated and then used as the operating characteristic information of the differential pressure transmitter in the whole working process.

2. The method for detecting the operation of a differential pressure transmitter according to claim 1, characterized in that, The process of assigning confidence weights to the corresponding differential pressure transmitters based on their operating characteristic information, and then generating the operating coefficients of the corresponding differential pressure transmitters, includes: Set a set of judgment conditions. The set of judgment conditions is used to determine the stability of the output signal flow of the differential pressure transmitter under each time segment included in the operating characteristic information. If the operating characteristics of the output signal stream of the differential pressure transmitter do not meet the set of judgment conditions in a certain time period, the output signal stream in the corresponding time period is determined to be unstable. If the operating characteristics of the output signal stream in a certain time period meet the set of judgment conditions, the output signal stream in the corresponding time period is stable. Count the number of conditions that the output signal stream meets in the decision condition set for each time interval. The number of conditions that meet the conditions is an integer from 0 to 3. Assign a confidence weight to the output signal stream for the corresponding time interval based on the number of conditions that meet the conditions. The confidence weight is 0 or 1. When the number of valid conditions is 0 or 1, the confidence weight of the corresponding time segment is assigned to 0. When the number of valid conditions is 2 or 3, the confidence weight of the corresponding time segment is assigned to 1. Based on the confidence weight assigned to the output signal stream in each time interval, and the total number of time intervals corresponding to the output signal stream, the operating coefficients of the differential pressure transmitter corresponding to the output signal stream are generated, and the numbered... The operating coefficient corresponding to the differential pressure transmitter is denoted as .

3. The method for detecting the operation of a differential pressure transmitter according to claim 2, characterized in that, The process of detecting the operating status of each differential pressure transmitter by performing corresponding state mode detection based on the operating coefficient of each transmitter includes: Set the coefficient range for the differential pressure transmitter to perform state mode detection; The coefficient determination interval includes a low confidence interval and a high confidence interval, which are denoted as follows: as well as ; when At that time, it was detected that the operating status of the corresponding differential pressure transmitter was abnormal; when At that time, the operation status of the corresponding differential pressure transmitter was detected to be normal.

4. The method for detecting the operation of a differential pressure transmitter according to claim 3, characterized in that, The process of classifying differential pressure transmitters exhibiting abnormal operating conditions and arranging for relevant maintenance personnel to carry out repairs includes: Obtain historical operating data of the differential pressure transmitter at a historical time, and construct a corresponding operating fault database based on the historical operating data when the differential pressure transmitter is in a fault. The operating fault database stores the characteristic data corresponding to the differential pressure transmitter in different fault types. Export the operating data corresponding to all differential pressure transmitters with abnormal operating status, generate the corresponding test dataset, input it into the operation fault database, and then match the test dataset with all feature data. When the similarity between the operational data included in the dataset to be inspected and a certain feature data in the operational fault database exceeds a preset matching threshold, the fault type corresponding to the matched feature data will be labeled on the differential pressure transmitter corresponding to the operational data. The fault type of the differential pressure transmitter corresponding to each operating data is matched by the operating fault database. A maintenance auxiliary log is created for each differential pressure transmitter with abnormal operating status and pushed to the terminal equipment of the relevant maintenance personnel. After receiving and referring to the maintenance auxiliary log, the relevant maintenance personnel arrange the maintenance of the corresponding differential pressure transmitter and record all maintenance operation information in the maintenance auxiliary log.

5. The method for detecting the operation of a differential pressure transmitter according to claim 4, characterized in that, The process of periodically testing differential pressure transmitters in other operating states includes: Perform periodic testing on differential pressure transmitters that are operating normally; Set a detection cycle, which consists of several sub-detection periods; During each sub-detection period, the output signal of the differential pressure transmitter in normal operation is tested once to determine whether the signal fluctuation of the output signal of the differential pressure transmitter is within the preset value fluctuation range. If yes, no operation is performed; otherwise, an abnormal response is generated. The number of sub-detection periods in which the differential pressure transmitter generates abnormal responses under each normal operating condition is counted. If the number exceeds 1 / 3 or more of the total number of sub-detection periods under 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 a differential pressure transmitter is accompanied by a potential fault, a standard pressure source device is used to verify the current differential pressure transmitter. When the differential pressure transmitter continues to be in normal operation, the next testing cycle for periodic testing of the differential pressure transmitter is set.

6. An operation detection system for a differential pressure transmitter, used to implement the operation detection method according to any one of claims 1 to 5, characterized in that, The system includes: The signal acquisition module is used to acquire the output signal of the differential pressure transmitter and process the output signal to generate the corresponding output signal stream. The feature extraction module is used to extract features from the output signal stream, thereby extracting the operating feature information of the differential pressure transmitter. Based on the operating feature information, confidence weights are assigned to the corresponding differential pressure transmitters, thereby generating the operating coefficients of the corresponding differential pressure transmitters. The status detection module is used to detect the corresponding status mode based on the operating coefficient of each differential pressure transmitter, thereby detecting the operating status of each differential pressure transmitter. The execution module classifies differential pressure transmitters with abnormal operating status into fault categories and arranges relevant maintenance personnel to carry out repairs, while performing periodic tests on differential pressure transmitters in other operating states.

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