System and method for monitoring response time of header valve

Abstract

The invention relates to the technical field of valves, and discloses a header valve response time monitoring system comprising a data acquisition module used for acquiring state data and environmental parameter data of a header valve; the data preprocessing module is connected with the data acquisition module; the environment interference assessment module is connected with the data preprocessing module and assesses the environment interference degree according to the environment parameter data; the weighted average calculation module is connected with the data preprocessing module and the environment interference evaluation module; a response time determination module; and a display and storage module. The influence of environmental factors on the response time of the header valve is comprehensively considered, the environmental interference evaluation module is utilized to evaluate the environmental interference degree according to the environmental parameter data, and the weighting coefficient is determined in the weighted average calculation module according to the environmental interference degree, so that the influence of environmental interference on the monitoring result is effectively reduced, and the monitoring accuracy is improved. And the monitoring accuracy and reliability of the response time of the header valve are improved.

Description

Technical Field

[0001] The invention relates to the technical field of manifolds, and in particular to a monitoring system and method for the response time of manifold valves. Background Art

[0002] Manifold valves play a key control role in fluid delivery systems. In industrial production, manifold valves are used to control the delivery of various fluid media, such as petroleum, chemical, electric power, water supply and drainage and other industries. In the construction field, manifold valves are used to control HVAC systems, water supply and drainage systems, etc. In the transportation field, manifold valves are used to control fuel, hydraulic and other systems of ships and automobiles. In the application field of manifold valves, accurate monitoring of the response time of manifold valves is crucial to the stable operation and efficient control of the system.

[0003] Traditional methods for monitoring the response time of manifold valves usually only consider the status data of the valve itself, while ignoring the impact of environmental factors on valve performance. In practical applications, changes in parameters such as ambient temperature, humidity and pressure may interfere with the normal operation of the manifold valve, resulting in unstable response time. In addition, existing methods may be relatively simple in data processing, lacking effective removal of outliers and noise, and reasonable weighted processing of data under different degrees of environmental interference, which affects the accuracy and reliability of the monitoring results to a certain extent. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a monitoring system and method for the response time of a manifold valve, which solves the problem in the prior art that the response time of the manifold valve is easily affected by environmental factors.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a monitoring system and method for the response time of a manifold valve, comprising a data acquisition module for collecting state data and environmental parameter data of the manifold valve, wherein the environmental parameter data includes temperature, humidity and pressure; A data preprocessing module, connected to the data acquisition module, preprocesses the collected data to remove abnormal values ​​and noise; An environmental interference assessment module, connected to the data preprocessing module, assesses the degree of environmental interference based on environmental parameter data; A weighted average calculation module is connected to the data preprocessing module and the environmental interference assessment module, determines a weighted coefficient according to the degree of environmental interference, and performs weighted average calculation on the manifold valve status data; A response time determination module, connected to the weighted average calculation module, determines the response time of the manifold valve according to the weighted average state data; The display and storage module is connected to the response time determination module and is used to display the response time of the manifold valve and store related data.

[0006] Preferably, the data acquisition module includes a valve state sensor for detecting the open and closed states and intermediate state data of the manifold valve; Temperature sensor, used to collect ambient temperature data; Humidity sensor, used to collect environmental humidity data; Pressure sensor, used to collect environmental pressure data.

[0007] Preferably, the data preprocessing module uses a combination of a median filter algorithm and a mean filter algorithm to remove outliers and noise in the collected data.

[0008] Preferably, the environmental interference assessment module assesses the degree of environmental interference in the following manner: Let the temperature weight be W t , humidity weight is W h , pressure weight is W p , environmental interference degree E=W t ×T+W h ×H+W p ×P, where T is the degree to which the temperature deviates from the preset range, H is the degree to which the humidity deviates from the preset range, and P is the degree to which the pressure deviates from the preset range; If E is less than the preset threshold A, the environmental interference level is determined to be low; if E is greater than or equal to the preset threshold A and less than the preset threshold B, the environmental interference level is determined to be medium; if E is greater than or equal to the preset threshold B, the environmental interference level is determined to be high.

[0009] Preferably, the weighted average calculation module gives a higher weighting coefficient to the manifold valve status data when the environmental interference level is low, and reduces the weighting coefficient of the manifold valve status data and correspondingly increases the weighting coefficient of the historical data when the environmental interference level is high. The weighting coefficient is adjusted as follows: When the environmental disturbance level is low, W c = a 1 , W hist = a 2 (a 1 >a 2 ); When the environmental interference level is medium, W c = b 1 , W hist = b 2 (a 1 >b 1 >b 2 ); When the environmental interference level is high, W c = c 1 , W hist = c 2 (c 2 >c1 ), where W c is the weight of the current manifold valve status data, W hist is the weight of historical data.

[0010] The weighted average formula is: Y = W c ×X c + W hist ×X hist , where Y is the result of weighted average, X c is the current header valve status data, X hist For historical data.

[0011] Preferably, the response time determination module determines the time interval from when the manifold valve receives the control signal to when the state changes as the response time in the weighted averaged state data, and issues an alarm if the time interval is greater than a preset threshold.

[0012] Preferably, a method for monitoring the response time of a manifold valve comprises the following steps: S1. Collect the status data of the manifold valve and the environmental parameter data, including temperature, humidity and pressure, through the data acquisition module; S2. The collected data is transmitted to the data preprocessing module for preprocessing to remove outliers and noise; S3. Using the environmental interference assessment module to assess the degree of environmental interference based on environmental parameter data; S4. The weighted average calculation module performs weighted average calculation on the manifold valve status data according to the weighted coefficient, and then the response time determination module determines the response time of the manifold valve, and transmits the result to the display and storage module for display and storage.

[0013] Preferably, the data collection module in S1 further includes a data integrity checking unit, and the data integrity checking unit is used to determine whether the collected data is complete. If the collected data is incomplete, the data is collected again; if the data is complete, the data is entered into the next step.

[0014] Preferably, the data preprocessing module in S2 also includes a data quality assessment unit, which is used to determine whether the preprocessed data meets the requirements. If it does not meet the requirements, it returns to step one for re-collection; if it meets the requirements, it proceeds to the next step.

[0015] Preferably, if the environmental interference level is low, the process in S3 directly proceeds to S4, and if the environmental interference level is medium or high, the process in S4 proceeds to S4 after adjusting the weighting coefficient.

[0016] The present invention provides a monitoring system and method for the response time of a manifold valve, which has the following beneficial effects: The present invention comprehensively considers the influence of environmental factors on the response time of the manifold valve by collecting the status data of the manifold valve and the environmental parameter data, including temperature, humidity and pressure, etc., and uses the environmental interference assessment module to assess the degree of environmental interference according to the environmental parameter data, and determines the weighting coefficient according to the degree of environmental interference in the weighted average calculation module, and performs weighted average calculation on the manifold valve status data. When the degree of environmental interference is high, the weighting coefficient of the manifold valve status data is reduced and the weighting coefficient of the historical data is correspondingly increased, thereby effectively reducing the influence of environmental interference on the monitoring results and improving the accuracy and reliability of the monitoring of the manifold valve response time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a system block diagram of the present invention; Figure 2 It is a schematic diagram of the method flow of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0019] Please see attached Figure 1-Figure 2 The embodiment of the present invention provides a monitoring system and method for the response time of a manifold valve, including installing a valve state sensor near the manifold valve, the sensor can accurately detect the open and closed states and intermediate state data of the manifold valve, when the valve is at different openings, the sensor can output corresponding electrical signals to reflect the actual state of the valve; at the same time, a temperature sensor, a humidity sensor and a pressure sensor are installed, the temperature sensor adopts a high-precision thermistor or thermocouple, and can monitor the change of ambient temperature in real time, the humidity sensor adopts a capacitive or resistive sensor, and accurately measures the ambient humidity, and the pressure sensor adopts a piezoresistive or piezoelectric sensor, and is used to collect ambient pressure data; the data acquisition module transmits the collected manifold valve state data and environmental parameter data to the data preprocessing module.

[0020] The collected data is preprocessed by combining the median filtering algorithm and the mean filtering algorithm. For a set of temperature data, median filtering is first performed to remove obvious outliers, and then mean filtering is performed to further smooth the data and reduce the impact of noise. The preprocessed data will be transmitted to the environmental interference assessment module and the weighted average calculation module.

[0021] Set the temperature weight Wt , humidity weight W h and pressure weight W p According to the actual experimental data, it is determined that in a specific application scenario, the temperature has a greater impact on the environmental interference. t Set to 0.4, W h Set to 0.3, W p Set to 0.3, calculate the environmental interference level E=W t ×T+W h ×H+W p ×P. Where T is the degree to which the temperature deviates from the preset range. Assuming the preset temperature range is 20℃-30℃ and the current temperature is 35℃, then T=(35-30) / (30-20)=0.5. Similarly, calculate the degree to which the humidity deviates from the preset range H and the degree to which the pressure deviates from the preset range P. If E is less than the preset threshold A (assuming A=0.3), the environmental interference level is determined to be low; if E is greater than or equal to the preset threshold A and less than the preset threshold B (assuming B=0.6), the environmental interference level is determined to be medium; if E is greater than or equal to the preset threshold B, the environmental interference level is determined to be high.

[0022] The weighted average calculation module gives a higher weight to the manifold valve status data when the environmental interference level is low, and reduces the weight of the current manifold valve status data and correspondingly increases the weight of the historical manifold valve status data when the environmental interference level is high. The weighting coefficient is determined according to the environmental interference level. When the environmental interference level is low, W c =a 1 =0.7, W hist =a 2 =0.3; when the environmental interference level is medium, W c =b 1 =0.5, W hist =b 2 =0.5; when the environmental interference level is high, W c =c 1 =0.3, W hist =c 2 =0.7, using the weighted average formula Y=W c ×X c +W hist ×X hist Perform weighted average calculation on the manifold valve status data. Assume that the current manifold valve status data X c =80, historical data X hist=75, when the environmental interference is low, Y=0.7×80+0.3×75=78.5. In the weighted averaged state data, the time interval from the time the manifold valve receives the control signal to the time the state changes is determined as the response time. First, observe and analyze the weighted averaged state data, observe the change trend of the weighted averaged state data over time, and determine whether there is a rising, falling or stable stage that conforms to the valve action law. Find the time point when the manifold valve receives the control signal, and use it as the starting point. Then determine the time point when the valve state changes significantly and reaches a new stable state as the end point. Subtract the time of the end point from the time of the start point. The difference is the response time of the manifold valve. If the time when the manifold valve receives the opening signal is t 1 The time it takes for the valve to change from a closed state to an open state and stabilize is t. 2 , then the response time T = t 2 -t 1 , set the threshold value related to the valve status. When the weighted average status data exceeds or falls below a certain threshold, it is considered that the valve status has changed accordingly. Specifically, when the manifold valve receives the opening signal, the valve status sensor monitors that the time interval for the valve to change from the closed state to the open state is 2 seconds, then the response time is 2 seconds, and the preset threshold is set to 3 seconds. If the time interval is greater than the preset threshold, an alarm is issued to remind the staff that the manifold valve may have a fault or abnormality.

[0023] The response time and related data of the manifold valve are displayed on the display screen, which is convenient for the staff to view in real time. The LCD screen is used to clearly display the response time, environmental parameters and other information. At the same time, the data is stored in the database for subsequent query and analysis.

[0024] A method for monitoring the response time of a header valve, comprising: Step S1: Data collection: The valve status sensor, temperature sensor, humidity sensor and pressure sensor in the data acquisition module collect the status data of the manifold valve and the environmental parameter data. The data integrity verification unit judges the collected data to check whether all sensors have data output and whether the timestamp of the data is continuous. If the data is incomplete, re-collect it; if it is complete, go to the next step. The data integrity verification unit can perform the following operations: Data counting verification: Count the collected data on the status of the manifold valve and environmental parameters such as temperature, humidity, and pressure, respectively, set the expected number of data to be collected, and compare the actual number of data collected with it. If the actual number is consistent with the expected number, it is preliminarily judged that the data may be complete. If not, it is judged that the data is incomplete. Key parameter check: For the manifold valve status data, check whether it contains key status identifiers, such as open, closed, and intermediate states. For environmental parameter data, check whether key parameters such as temperature, humidity, and pressure have corresponding values. If any key parameter is missing, the data is judged to be incomplete.

[0025] Timestamp verification: If the data collection has a timestamp, check whether the timestamp is continuous. If the time interval is abnormal or the timestamp is discontinuous, it may mean that there is a problem in the data collection process and the data is judged to be incomplete.

[0026] Step S2: Data preprocessing: The collected data is transmitted to the data preprocessing module, and outliers and noise are removed by combining the median filter algorithm and the mean filter algorithm. The data quality assessment unit judges the preprocessed data to check whether the data is within a reasonable range and whether there are obvious abnormal fluctuations. If it does not meet the requirements, it returns to step 1 and re-collects; if it meets the requirements, it proceeds to the next step. The data quality assessment unit can use the following sub-units for quality assessment: Outlier detection subunit: Use statistical methods or box plot method to detect whether there are still outliers in the preprocessed data. If outliers are detected, the data is judged to be non-compliant; Noise level assessment subunit: evaluates whether the noise level in the preprocessed data is within an acceptable range by calculating the noise power or signal-to-noise ratio of the signal. If the noise level is too high, the data is judged to be unqualified. Data range verification subunit: For the manifold valve status data, check whether it is within the reasonable status value range. For the environmental parameter data, check whether the pre-processed data is within the preset temperature, humidity and pressure ranges. If it exceeds the range, the data is judged to be non-compliant.

[0027] Step S3: Environmental interference assessment: The environmental interference assessment module is used to assess the degree of environmental interference based on environmental parameter data, calculate the degree of temperature deviation from the preset range T, the degree of humidity deviation from the preset range H and the degree of pressure deviation from the preset range P, and then according to the formula E=W t ×T+W h ×H+W p ×P calculates the environmental interference level E and determines whether the environmental interference level is low, medium or high based on the value of E.

[0028] Step S4: Weighted average calculation and response time determination: If the environmental interference level is low, the weighted average calculation module is directly entered to perform weighted average calculation on the manifold valve status data according to the current weighting coefficient. Then, the response time determination module determines the response time of the manifold valve, and transmits the result to the display and storage module for display and storage. If the environmental interference level is medium or high, the weighting coefficient is adjusted first, and then the weighted average calculation and response time determination are performed, and finally the result is transmitted to the display and storage module.

[0029] The above-mentioned embodiments comprehensively consider the influence of environmental factors on the response time of the manifold valve, effectively reduce the influence of environmental interference on the monitoring results, and improve the accuracy and reliability of the monitoring of the response time of the manifold valve.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A monitoring system for the response time of a manifold valve, characterized in that: include: A data acquisition module is used to collect the current state data of the manifold valve and environmental parameter data, wherein the environmental parameter data includes temperature, humidity and pressure; A data preprocessing module, connected to the data acquisition module, preprocesses the collected data to remove abnormal values ​​and noise; An environmental interference assessment module, connected to the data preprocessing module, assesses the degree of environmental interference based on environmental parameter data; A weighted average calculation module is connected to the data preprocessing module and the environmental interference assessment module, determines the weight of the current state data of the manifold valve and the weight of the historical state data of the manifold valve according to the degree of environmental interference, and performs weighted average calculation on the current state data and the historical state data of the manifold valve; A response time determination module, connected to the weighted average calculation module, determines the response time of the manifold valve according to the weighted average state data; The display and storage module is connected to the response time determination module and is used to display the response time of the manifold valve and store related data.

2. A monitoring system for the response time of a manifold valve according to claim 1, characterized in that: The data acquisition module comprises: Valve status sensor, used to detect the open, closed and intermediate status data of the header valve; Temperature sensor, used to collect ambient temperature data; Humidity sensor, used to collect environmental humidity data; Pressure sensor, used to collect environmental pressure data.

3. A monitoring system for the response time of a manifold valve according to claim 1, characterized in that: The data preprocessing module uses a combination of a median filter algorithm and a mean filter algorithm to remove abnormal values ​​and noise in the collected data.

4. A monitoring system for the response time of a manifold valve according to claim 1, characterized in that: The environmental interference assessment module assesses the degree of environmental interference in the following manner: Environmental interference degree E=W t ×T+W h ×H+W p ×P, where W t is the temperature weight, W h is the humidity weight, W p is the pressure weight, T is the degree to which the temperature deviates from the preset range, H is the degree to which the humidity deviates from the preset range, and P is the degree to which the pressure deviates from the preset range; If E is less than the preset threshold A, it is determined that the environmental interference level is low; If E is greater than or equal to the preset threshold A and less than the preset threshold B, the environmental interference level is determined to be medium; If E is greater than or equal to the preset threshold B, it is determined that the environmental interference level is high.

5. A monitoring system for the response time of a manifold valve according to claim 4, characterized in that: The weighted average calculation module gives a higher weight to the current state data of the manifold valve when the environmental interference level is low, and reduces the weight of the current state data of the manifold valve and correspondingly increases the weight of the historical state data of the manifold valve when the environmental interference level is high. The weight adjustment method is: When the environmental disturbance level is low, W c =a1,W hist =a2, a1>a2; When the environmental interference level is medium, W c =b1,W hist =b2, a1>b1>b2; When the environmental disturbance level is high, W c =c1,W hist =c2, c2>c1, c2=a1; Where W c is the current state data weight of the manifold valve, W hist is the weight of the historical status data of the manifold valve; a1, a2, b1, b2 c2 and c1 are all weight values; The weighted average formula is: Y=W c ×X c +W hist ×X hist ; Among them, Y is the result of weighted average, X c is the current status data of the manifold valve, X hist It is the historical status data of the manifold valve.

6. A monitoring system for the response time of a manifold valve according to claim 1, characterized in that: The response time determination module determines the time interval from when the manifold valve receives the control signal to when the state changes in the weighted average state data as the response time, and issues an alarm if the time interval is greater than a preset threshold.

7. A method for monitoring the response time of a manifold valve, using a monitoring system for the response time of a manifold valve according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Collect the state data of the manifold valve and the environmental parameter data through the data acquisition module, wherein the environmental parameter data include temperature, humidity and pressure; S2. The collected data is transmitted to the data preprocessing module for preprocessing to remove outliers and noise; S3. Using the environmental interference assessment module to assess the degree of environmental interference based on environmental parameter data; S4. The weighted average calculation module performs weighted average calculation on the manifold valve status data according to the weighted coefficient, and then the response time determination module determines the response time of the manifold valve, and transmits the result to the display and storage module for display and storage.

8. A method for monitoring the response time of a manifold valve according to claim 7, characterized in that: The data collection module in S1 further includes a data integrity checking unit, which is used to determine whether the collected data is complete. If the collected data is incomplete, the data is collected again; if the data is complete, the data goes to the next step.

9. A method for monitoring the response time of a manifold valve according to claim 7, characterized in that: The data preprocessing module in S2 also includes a data quality assessment unit, which is used to determine whether the preprocessed data meets the requirements. If not, the data returns to step S1 for re-collection; if it meets the requirements, the data proceeds to the next step.

10. A method for monitoring the response time of a manifold valve according to claim 7, characterized in that: If the environmental interference level is low, the process in S3 directly enters S4. If the environmental interference level is medium or high, the process enters S4 after adjusting the weighting coefficient.

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