Adjusting valve linear deviation rectifying method and system

Abstract

The invention provides a linear deviation rectifying method and system for a regulating valve, and belongs to the technical field of linear automation. The method comprises the following steps: acquiring factory information of a regulating valve according to a regulating valve historical library, configuring a parameter sensor on the regulating valve, and acquiring real-time parameter data of the regulating valve; according to a central control device of the regulating valve, the parameter type is obtained, and the central control device is adjusted to obtain corresponding actual response data in the operation process of the regulating valve; time nodes of the real-time parameter data and the actual response data of the regulating valve are preprocessed, standard parameter data and standard response data are obtained, and an actual output database is constructed; according to the data of the actual output database, generating an actual operation curve for correction processing, and obtaining correction linearization features; and testing the correction linearization characteristics of the regulating valve, starting regulation according to the selective factor conditions, obtaining final linearization characteristics, and configuring the final linearization characteristics into a regulating valve correction strategy. The linear curve of the valve can be dynamically adjusted, and the stability and rapidity of adjustment are improved.

Description

Technical Field

[0001] The invention relates to the field of linear automatic technology, and in particular to a linear deviation correction method and system for a regulating valve. Background Art

[0002] At present, in production sites such as thermal power plants, the control of temperature, pressure, flow and other conditions is mostly applied to control valves. The linear accuracy of the control valve determines the stability and rapidity of parameter adjustment to a large extent. After the valve is manufactured, there is a fixed corresponding relationship between the corresponding valve position and the medium, that is, the linear function is fixed. For example, the relationship between the valve position opening and the flow rate is a straight line after the valve leaves the factory. However, as the valve is used for a long time and the valve core is worn, the relationship between the valve position opening and the medium flow rate will gradually change, and the linearity will also differ.

[0003] Therefore, the present invention proposes a regulating valve linear deviation correction method and system. Summary of the invention

[0004] The present invention provides a regulating valve linear deviation correction method and system, which provides a reasonable valve correction curve through data analysis, thereby overcoming the problem that the linear deviation of valve regulation gradually increases due to valve core wear and other reasons when the regulating valve is running for a long time, affecting the automatic regulation quality.

[0005] In one aspect, the present invention provides a method for linear deviation correction of a regulating valve, comprising:

[0006] Step 1: According to the control valve history library, the factory information of the control valve is obtained, and a parameter sensor is configured on the control valve to obtain the real-time parameter data of the control valve;

[0007] Step 2: According to the central control device of the regulating valve, different parameter types are enabled to adjust the central control device to obtain the corresponding actual response data during the operation of the regulating valve;

[0008] Step 3: Preprocess the real-time parameter data and actual response data of the control valve at the time node, obtain the standard parameter data and standard response data corresponding to the time, and build an actual output database;

[0009] Step 4: Generate an actual operation curve based on the data of the actual output database, and perform correction processing with the standard operation curve obtained based on the factory information to obtain the correction linearization characteristics;

[0010] Step 5: configure the correction linearization characteristics of the control valve into the test, perform selective factor conditional activation adjustment, obtain the final linearization characteristics and configure them into the control valve correction strategy.

[0011] On the other hand, according to the control valve history library, the factory information of the control valve is obtained, including:

[0012] Acquire a unique identifier of the regulating valve, match the identifier with a regulating valve history library, and obtain initial factory information of the regulating valve;

[0013] The initial factory information is processed by a unit to obtain a corresponding relationship between a preset flow rate and a valve position of the regulating valve, and the preset flow rate and the valve position are in a proportional relationship, and the proportional ratio is a standard ratio.

[0014] On the other hand, a parameter sensor is configured on the regulating valve to obtain real-time parameter data of the regulating valve, including:

[0015] According to the preset parameter type of the regulating valve, a parameter sensor corresponding to the preset parameter type is matched;

[0016] Install the parameter sensor to the corresponding installation position based on the corresponding sensor manual, and install and configure the parameter sensor based on the sensor manual;

[0017] The parameter sensor is used to obtain the real-time parameter data of the control valve.

[0018] On the other hand, according to the central control device of the regulating valve, different parameter adjustments are enabled to obtain the corresponding actual response data during the operation of the regulating valve, including:

[0019] Determine the access port number of the central control device of the regulating valve, and obtain the permission to access the central control device based on the port number matching;

[0020] Data collection points are configured in the central control device, control switches of different parameter types are enabled respectively, and actual response data of corresponding parameter types are obtained from the operating regulating valve according to the parameter type-preset collection frequency, wherein the actual response data includes data of all enabled parameter types.

[0021] On the other hand, the real-time parameter data and actual response data of the control valve are preprocessed at the time node to obtain the standard parameter data and standard response data corresponding to the time, and to build an actual output database, including:

[0022] Calibrate the time nodes of the real-time parameter data of any parameter type of the regulating valve and the corresponding actual response data;

[0023] The real-time parameter data set is D1 = {v1 i ,t1 i}, the actual response data set is D2 = {v2 i ,t2 i}, define a standard time axis as T, map D1 and D2 to the timestamp sequence on T, then the data corresponding to the timestamp sequence is:

[0024] Among them, s i represents the mapping ratio of the i-th timestamp sequence, round() represents the rounding function, T i represents the standard time of the i-th timestamp sequence, represents the common mapping function of D1 and D2, w i represents the data of the i-th timestamp sequence, ln() represents the exponential function, and w max Indicates the maximum value of the timestamp sequence, w min Represents the minimum value of the timestamp sequence, w avg Represents the mean of the timestamp series;

[0025] Then the standard parameter data set is D'1 = {v1 i ×s i ,T i}, the standard response data set is D'2 = {v2 i ×s i ,T i};

[0026] According to the preset standard fields, an actual output database is constructed, and the standard parameter data set and the standard response data set are stored in the actual output database.

[0027] On the other hand, according to the data of the actual output database, an actual operation curve is generated, and a correction process is performed with the standard operation curve obtained according to the factory information to obtain the correction linearization characteristics, including:

[0028] Obtain standard parameter data of any parameter type and corresponding standard response data in the actual output database, construct an actual operation curve under the influence of the standard parameter of the parameter type, and perform curve correction and correction on the standard operation curve constructed by the preset flow-valve position standard ratio to obtain a first curve;

[0029] A feedforward compensator is constructed according to the standard response data, and a first curve is linearly approximated according to a timestamp sequence based on the feedforward compensator to obtain an initial nonlinear influence degree of the feedforward compensator;

[0030] A predictive nonlinear model is constructed based on the first curve and the initial nonlinear influence, and is matched and verified with the response data of all parameter types actually enabled to obtain the corrected linearization characteristics.

[0031] On the other hand, the correction linearization characteristics of the control valve are configured into the test, and the selective factor condition is enabled to adjust, and the final linearization characteristics are obtained and configured into the control valve correction strategy, including:

[0032] Configure the feedforward correction linearization feature of any parameter type into the test environment, perform feedback control test of the parameter type, and obtain final response data;

[0033] Acquire predicted response data based on the correction linearization characteristics, perform deviation analysis with the final response data, and acquire positive feedback adjustment parameters;

[0034] The feedforward compensator is configured based on the positive feedback adjustment parameters, and the final linearization characteristics are obtained by reconfiguring with the correction linearization characteristics;

[0035] Matching the final linearization characteristics to the system control parameters of the parameter type to generate a regulating valve correction strategy node;

[0036] The strategy nodes of all parameter types are combined into a control valve correction strategy, and the stability of the correction strategy is verified. If the minimum stability is not met, re-adjustment is performed. Otherwise, the stability is monitored in real time, and dynamic adjustments are made in case of abnormalities.

[0037] In another aspect, the present invention provides a regulating valve linear deviation correction system, comprising:

[0038] Initial data module: obtaining the factory information of the regulating valve according to the regulating valve history library, configuring a parameter sensor on the regulating valve, and obtaining the real-time parameter data of the regulating valve;

[0039] Response data module: according to the central control device of the regulating valve, different parameter types are enabled to adjust the central control device to obtain the corresponding actual response data during the operation of the regulating valve;

[0040] Standardization module: pre-process the real-time parameter data and actual response data of the control valve at the time node, obtain the standard parameter data and standard response data corresponding to the time, and build an actual output database;

[0041] Correction module: Generates the actual operation curve according to the data of the actual output database, and performs correction processing with the standard operation curve obtained according to the factory information to obtain the correction linearization characteristics;

[0042] Configuration module: configure the correction linearization characteristics of the control valve into the test, perform selective factor conditional activation adjustment, obtain the final linearization characteristics and configure them into the control valve correction strategy.

[0043] The present invention provides a regulating valve linear deviation correction method and system, which provides a reasonable valve correction curve through data analysis, thereby overcoming the problem that the linear deviation of valve regulation gradually increases due to valve core wear and other reasons when the regulating valve is running for a long time, affecting the automatic regulation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 It is a flow chart of a method for linear deviation correction of a regulating valve provided by an embodiment of the present invention;

[0046] Figure 2 It is a structural schematic diagram of a linear deviation correction system for a regulating valve provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0048] Embodiment 1:

[0049] like Figure 1 As shown, a method for linear deviation correction of a regulating valve provided by an embodiment of the present invention includes:

[0050] Step 1: According to the control valve history library, the factory information of the control valve is obtained, and a parameter sensor is configured on the control valve to obtain the real-time parameter data of the control valve;

[0051] Step 2: According to the central control device of the regulating valve, different parameter types are enabled to adjust the central control device to obtain the corresponding actual response data during the operation of the regulating valve;

[0052] Step 3: Preprocess the real-time parameter data and actual response data of the control valve at the time node, obtain the standard parameter data and standard response data corresponding to the time, and build an actual output database;

[0053] Step 4: Generate an actual operation curve based on the data of the actual output database, and perform correction processing with the standard operation curve obtained based on the factory information to obtain the correction linearization characteristics;

[0054] Step 5: configure the correction linearization characteristics of the control valve into the test, perform selective factor conditional activation adjustment, obtain the final linearization characteristics and configure them into the control valve correction strategy.

[0055] In this embodiment, the control valve history library refers to a database that records and stores the factory information, operation history and other relevant data of the control valve.

[0056] In this embodiment, the regulating valve is a device for controlling the flow, pressure, temperature or other parameters of a fluid (liquid or gas), and the flow of the fluid is changed or the fluid is blocked by adjusting the valve opening to achieve system regulation and control.

[0057] In this embodiment, the factory information refers to the various key parameters and characteristics recorded when the control valve leaves the manufacturer, including: the model and specifications of the control valve, the manufacturing date and factory number, the design parameters, the maximum flow rate, the maximum pressure, the operating temperature range, etc.

[0058] In this embodiment, the parameter sensor is a device used to measure and monitor various physical or chemical quantities during the operation of a control valve or other equipment, including: a pressure sensor, a temperature sensor, a flow sensor, a position sensor, etc.

[0059] In this embodiment, the real-time parameter data refers to data of various key physical quantities or chemical quantities acquired in real time by parameter sensors during the operation of the regulating valve, including: pressure, temperature, flow, liquid level, etc.

[0060] In this embodiment, the central control device refers to a central control device that integrates the operation and control process of the regulating valve and is used to monitor and manage multiple devices.

[0061] In this embodiment, the actual response data refers to the actual response of the regulating valve to various control inputs during operation, including changes in flow rate, pressure difference, temperature, liquid level, etc.

[0062] In this embodiment, the time node refers to a time interval used for preprocessing data.

[0063] In this embodiment, preprocessing includes: time alignment, data cleaning, data conversion, and data aggregation process steps.

[0064] In this embodiment, the actual output database refers to a structured database storing real-time parameter data and actual response data of the control valve.

[0065] In this embodiment, the actual operation curve refers to a curve formed by response data recorded during the actual operation of the control valve.

[0066] In this embodiment, the standard operating curve refers to an expected performance curve obtained by testing the control valve according to a theoretical model during the design phase.

[0067] In this embodiment, the correction process refers to a process of comparing the difference between the actual operation data and the theoretical expectation and adjusting the control valve accordingly.

[0068] In this embodiment, the correction linearization characteristics include the response mode and performance characteristics of the control valve under different operating conditions, including: response time adjustment, sensitivity and accuracy adjustment, nonlinear correction, etc.

[0069] In this embodiment, the test refers to configuring the previously obtained control valve correction linearization characteristics into an actual test environment to verify whether these characteristics can effectively improve the performance and response of the control valve.

[0070] In this embodiment, the selective factors selectively adjust and optimize the working parameters of the regulating valve according to actual conditions, including: working condition parameter selection, operation mode selection, environmental adaptability, etc.

[0071] In this embodiment, the final linearization characteristics refer to the operating characteristics of the regulating valve after correction and optimization, including: optimized response time and accuracy, optimization of parameter adjustment, etc.

[0072] In this embodiment, the correction strategy refers to a specific adjustment strategy or control strategy formulated according to the control valve correction linearization characteristics obtained in step 4.

[0073] The working principle and beneficial effects of the above technical solution are: using real-time data analysis and correction to improve the accuracy and stability of the control valve, reduce operating costs, and optimize the performance of the industrial automation system.

[0074] Embodiment 2:

[0075] On the basis of the above-mentioned embodiment 1, the factory information of the regulating valve is obtained according to the regulating valve history library, including:

[0076] Acquire a unique identifier of the regulating valve, match the identifier with a regulating valve history library, and obtain initial factory information of the regulating valve;

[0077] The initial factory information is processed by a unit to obtain a corresponding relationship between a preset flow rate and a valve position of the regulating valve, and the preset flow rate and the valve position are in a proportional relationship, and the proportional ratio is a standard ratio.

[0078] In this embodiment, the unique identifier refers to a code used to uniquely identify a specific regulating valve.

[0079] In this embodiment, the initial factory information refers to a series of key data and parameters recorded when the control valve is produced and shipped, including the model and specifications of the control valve, manufacturing date and factory number, design parameters, maximum flow, maximum pressure, operating temperature range, etc.

[0080] In this embodiment, unit processing refers to the process of gradually processing, analyzing and converting data or information.

[0081] In this embodiment, the preset flow-valve position correspondence refers to the preset flow values ​​corresponding to the regulating valve at different valve positions.

[0082] In this embodiment, the standard ratio refers to a ratio in which the corresponding valve position and the medium have a fixed corresponding relationship.

[0083] The working principle and beneficial effects of the above technical solution are: obtaining factory information by matching the control valve history library with a unique identifier, realizing the proportional relationship processing of the preset flow-valve position, improving the accuracy and stability of the control valve, reducing energy consumption, and optimizing industrial process efficiency.

[0084] Embodiment 3:

[0085] On the basis of the above-mentioned embodiment 1, a parameter sensor is configured on the regulating valve to obtain real-time parameter data of the regulating valve, including:

[0086] According to the preset parameter type of the regulating valve, a parameter sensor corresponding to the preset parameter type is matched;

[0087] Install the parameter sensor to the corresponding installation position based on the corresponding sensor manual, and install and configure the parameter sensor based on the sensor manual;

[0088] The parameter sensor is used to obtain the real-time parameter data of the control valve.

[0089] In this embodiment, the preset parameter type refers to preset key parameters of the regulating valve, such as pressure, flow, position, temperature, etc.

[0090] In this embodiment, the instruction manual refers to a user manual or technical specification of the sensor or device, including detailed information about the sensor, installation guide, usage instructions, and maintenance recommendations.

[0091] The working principle and beneficial effects of the above technical solution are: select matching sensors according to preset parameter types, install and configure them to specified locations according to the instructions, obtain control valve parameter data in real time, improve its operating accuracy and reliability, and optimize efficiency.

[0092] Embodiment 4:

[0093] On the basis of the above-mentioned embodiment 1, according to the central control device of the regulating valve, different parameter adjustments are respectively enabled to obtain the corresponding actual response data during the operation of the regulating valve, including:

[0094] Determine the access port number of the central control device of the regulating valve, and obtain the permission to access the central control device based on the port number matching;

[0095] Data collection points are configured in the central control device, control switches of different parameter types are enabled respectively, and actual response data of corresponding parameter types are obtained from the operating regulating valve according to the parameter type-preset collection frequency, wherein the actual response data includes data of all enabled parameter types.

[0096] In this embodiment, the port number refers to the port number used by the device in the network communication, which is used for the control and communication of different devices.

[0097] In this embodiment, permission refers to the ability or permission of a user or device to perform specific operations in the system.

[0098] In this embodiment, the data collection point refers to an interface predefined on a device and is used to obtain real-time data of a specific type.

[0099] In this embodiment, the control switch is used to enable or disable a specific function.

[0100] The working principle and beneficial effects of the above technical solution are: obtaining permissions through the device access port number, configuring data collection points, collecting data of various parameter types of the control valve in real time, optimizing centralized control and maintenance, and improving equipment responsiveness and operating efficiency.

[0101] Embodiment 5:

[0102] On the basis of the above-mentioned embodiment 4, the real-time parameter data and the actual response data of the regulating valve are preprocessed at the time node, the standard parameter data and the standard response data corresponding to the time are obtained, and the actual output database is constructed, including:

[0103] Calibrate the time nodes of the real-time parameter data of any parameter type of the regulating valve and the corresponding actual response data;

[0104] The real-time parameter data set is D1 = {v1 i ,t1 i}, the actual response data set is D2 = {v2 i ,t2 i}, define a standard time axis as T, map D1 and D2 to the timestamp sequence on T, then the data corresponding to the timestamp sequence is:

[0105] Among them, s i represents the mapping ratio of the i-th timestamp sequence, round() represents the rounding function, T i represents the standard time of the i-th timestamp sequence, represents the common mapping function of D1 and D2, w i represents the data of the i-th timestamp sequence, ln() represents the exponential function, and w maxIndicates the maximum value of the timestamp sequence, w min Represents the minimum value of the timestamp sequence, w avg Represents the mean of the timestamp series;

[0106] Then the standard parameter data set is D'1 = {v1 i ×s i ,T i}, the standard response data set is D'2 = {v2 i ×s i ,T i};

[0107] According to the preset standard fields, an actual output database is constructed, and the standard parameter data set and the standard response data set are stored in the actual output database.

[0108] In this embodiment, calibration refers to determining the performance characteristics or parameter standard values ​​of a system, device or instrument through experiments.

[0109] In this embodiment, the standard time axis is a unified time series, which is used to map the real-time parameter data and actual response data of the control valve to the same time frame.

[0110] In this embodiment, the timestamp sequence is a series of timestamp sets arranged in chronological order, and each timestamp represents a specific data collection time point.

[0111] In this embodiment, the mapping ratio refers to a proportional relationship of mapping the time stamps of the real-time parameter data and the actual response data onto the standard time axis.

[0112] In this embodiment, the preset standard fields refer to information and fields that need to be included in the actual output database.

[0113] In this embodiment, the standard parameter data set refers to a set of regulating valve parameter data corresponding to a standard time axis after time node preprocessing.

[0114] In this embodiment, the standard response data set

[0115] The working principle and beneficial effects of the above technical solution are: by calibrating time nodes and standardizing data, accurate mapping of control valve parameters and responses is achieved, a structured actual output database is built, and data analysis and performance optimization capabilities are improved.

[0116] Embodiment 6:

[0117] On the basis of the above-mentioned embodiment 5, an actual operation curve is generated according to the data of the actual output database, and a correction process is performed with the standard operation curve obtained according to the factory information to obtain a correction linearization feature, including:

[0118] Obtain standard parameter data of any parameter type and corresponding standard response data in the actual output database, construct an actual operation curve under the influence of the standard parameter of the parameter type, and perform curve correction and correction on the standard operation curve constructed by the preset flow-valve position standard ratio to obtain a first curve;

[0119] A feedforward compensator is constructed according to the standard response data, and a first curve is linearly approximated according to a timestamp sequence based on the feedforward compensator to obtain an initial nonlinear influence degree of the feedforward compensator;

[0120] A predictive nonlinear model is constructed based on the first curve and the initial nonlinear influence, and is matched and verified with the response data of all parameter types actually enabled to obtain the corrected linearization characteristics.

[0121] In this embodiment, the preset standard ratio of flow rate to valve position refers to the theoretical value of the valve opening or valve position of the regulating valve at different flow rate settings under standard test conditions.

[0122] In this embodiment, the standard operation curve refers to a curve of the expected operation behavior of the device or system under ideal or standard conditions.

[0123] In this embodiment, the first curve refers to an actual operation curve obtained after correction processing is performed based on data in the actual output database and the standard operation curve.

[0124] In this embodiment, the feedforward compensator refers to a controller algorithm for correcting and adjusting the system response, and is used to predict and compensate for known nonlinear influencing factors before the system responds.

[0125] In this embodiment, linear approximation refers to performing local approximation on a certain quantity in a nonlinear system.

[0126] In this embodiment, the initial nonlinear influence refers to a result obtained when a linear approximation is performed on the first curve according to the feedforward compensator.

[0127] In this embodiment, the predictive nonlinear model is a mathematical model used to describe the nonlinear characteristics of the system in actual operation.

[0128] The working principle and beneficial effects of the above technical solution are: using actual data to correct the equipment operation curve, constructing a feedforward compensator and a nonlinear model, improving equipment accuracy and stability, and optimizing operating efficiency.

[0129] Embodiment 7:

[0130] On the basis of the above-mentioned embodiment 6, the correction linearization characteristics of the regulating valve are configured into the test, and the selective factor condition is enabled to adjust, and the final linearization characteristics are obtained and configured into the regulating valve correction strategy, including:

[0131] Configure the feedforward correction linearization feature of any parameter type into the test environment, perform feedback control test of the parameter type, and obtain final response data;

[0132] Acquire predicted response data based on the correction linearization characteristics, perform deviation analysis with the final response data, and acquire positive feedback adjustment parameters;

[0133] The feedforward compensator is configured based on the positive feedback adjustment parameters, and the final linearization characteristics are obtained by reconfiguring with the correction linearization characteristics;

[0134] Matching the final linearization characteristics to the system control parameters of the parameter type to generate a regulating valve correction strategy node;

[0135] The strategy nodes of all parameter types are combined into a control valve correction strategy, and the stability of the correction strategy is verified. If the minimum stability is not met, re-adjustment is performed. Otherwise, the stability is monitored in real time, and dynamic adjustments are made in case of abnormalities.

[0136] In this embodiment, the feedback control test is a process of verifying the response of the system, and verifying whether the actual behavior of the system after receiving the control command meets the expectations.

[0137] In this embodiment, the final response data refers to the actual system response data obtained after the feedback control test.

[0138] In this embodiment, deviation analysis refers to comparing the differences between the actually observed data and the expected or ideal values.

[0139] In this embodiment, the positive feedback adjustment parameters refer to parameters used to adjust the control system, including gain, integral time, differential time and other type parameters.

[0140] In this embodiment, the modified strategy node refers to the smallest unit of the control strategy by configuring and optimizing a single parameter type.

[0141] In this embodiment, the re-adjustment process refers to finding that the strategy does not meet the predetermined minimum stability requirement and needs to be re-acquired and corrected.

[0142] In this embodiment, stability refers to the ability of the system to maintain expected behavior when subjected to disturbances or parameter changes, including: stable response characteristics, anti-interference ability, anti-variability ability, robustness, etc.

[0143] The working principle and beneficial effects of the above technical solution are: optimizing the control valve response through correction and feedback control testing, configuring the correction strategy node to ensure system stability, and improving control accuracy and reliability.

[0144] Embodiment 8:

[0145] like Figure 2 As shown, a linear deviation correction system for a regulating valve provided by an embodiment of the present invention includes:

[0146] Initial data module: obtaining the factory information of the regulating valve according to the regulating valve history library, configuring a parameter sensor on the regulating valve, and obtaining the real-time parameter data of the regulating valve;

[0147] Response data module: according to the central control device of the regulating valve, different parameter types are enabled to adjust the central control device to obtain the corresponding actual response data during the operation of the regulating valve;

[0148] Standardization module: pre-process the real-time parameter data and actual response data of the control valve at the time node, obtain the standard parameter data and standard response data corresponding to the time, and build an actual output database;

[0149] Correction module: Generates the actual operation curve according to the data of the actual output database, and performs correction processing with the standard operation curve obtained according to the factory information to obtain the correction linearization characteristics;

[0150] Configuration module: configure the correction linearization characteristics of the control valve into the test, perform selective factor conditional activation adjustment, obtain the final linearization characteristics and configure them into the control valve correction strategy.

[0151] The working principle and beneficial effects of the above technical solution are: using real-time data analysis and correction to improve the accuracy and stability of the control valve, reduce operating costs, and optimize the performance of the industrial automation system.

[0152] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for linear deviation correction of a regulating valve, characterized in that: include: Step 1: According to the control valve history library, the factory information of the control valve is obtained, and a parameter sensor is configured on the control valve to obtain the real-time parameter data of the control valve; Step 2: According to the central control device of the regulating valve, different parameter types are enabled to adjust the central control device to obtain the corresponding actual response data during the operation of the regulating valve; Step 3: Preprocess the real-time parameter data and actual response data of the control valve at the time node, obtain the standard parameter data and standard response data corresponding to the time, and build an actual output database; Step 4: Generate an actual operation curve based on the data of the actual output database, and perform correction processing with the standard operation curve obtained based on the factory information to obtain the correction linearization characteristics; Step 5: configure the correction linearization characteristics of the control valve into the test, perform selective factor conditional activation adjustment, obtain the final linearization characteristics and configure them into the control valve correction strategy.

2. A method for linear deviation correction of a regulating valve according to claim 1, characterized in that: According to the control valve history library, obtain the factory information of the control valve, including: Acquire a unique identifier of the regulating valve, match the identifier with a regulating valve history library, and obtain initial factory information of the regulating valve; The initial factory information is processed by a unit to obtain a corresponding relationship between a preset flow rate and a valve position of the regulating valve, and the preset flow rate and the valve position are in a proportional relationship, and the proportional ratio is a standard ratio.

3. A method for linear deviation correction of a regulating valve according to claim 1, characterized in that: A parameter sensor is configured on the regulating valve to obtain real-time parameter data of the regulating valve, including: According to the preset parameter type of the regulating valve, a parameter sensor corresponding to the preset parameter type is matched; Install the parameter sensor to the corresponding installation position based on the corresponding sensor manual, and install and configure the parameter sensor based on the sensor manual; The parameter sensor is used to obtain the real-time parameter data of the control valve.

4. A method for linear deviation correction of a regulating valve according to claim 1, characterized in that: According to the central control device of the control valve, different parameter adjustments are enabled to obtain the corresponding actual response data during the operation of the control valve, including: Determine the access port number of the central control device of the regulating valve, and obtain the permission to access the central control device based on the port number matching; Data collection points are configured in the central control device, control switches of different parameter types are enabled respectively, and actual response data of corresponding parameter types are obtained from the operating regulating valve according to the parameter type-preset collection frequency, wherein the actual response data includes data of all enabled parameter types.

5. A method for linear deviation correction of a regulating valve according to claim 4, characterized in that: The real-time parameter data and actual response data of the control valve are preprocessed at the time node, the standard parameter data and standard response data corresponding to the time are obtained, and the actual output database is constructed, including: Calibrate the time nodes of the real-time parameter data of any parameter type of the regulating valve and the corresponding actual response data; The real-time parameter data set is D1 = {v1 i ,t1 i }, the actual response data set is D2 = {v2 i ,t2 i }, define a standard time axis as T, map D1 and D2 to the timestamp sequence on T, then the data corresponding to the timestamp sequence is: Among them, s i represents the mapping ratio of the i-th timestamp sequence, round() represents the rounding function, T i represents the standard time of the i-th timestamp sequence, represents the common mapping function of D1 and D2, w i represents the data of the i-th timestamp sequence, ln() represents the exponential function, and w max Indicates the maximum value of the timestamp sequence, w min Represents the minimum value of the timestamp sequence, w avg Represents the mean of the timestamp series; Then the standard parameter data set is D'1 = {v1 i ×s i ,T i }, the standard response data set is D'2 = {v2 i ×s i ,T i }; According to the preset standard fields, an actual output database is constructed, and the standard parameter data set and the standard response data set are stored in the actual output database.

6. A method for linear deviation correction of a regulating valve according to claim 5, characterized in that: According to the data of the actual output database, the actual operation curve is generated, and the correction processing is performed with the standard operation curve obtained according to the factory information to obtain the correction linearization characteristics, including: Obtain standard parameter data of any parameter type and corresponding standard response data in the actual output database, construct an actual operation curve under the influence of the standard parameter of the parameter type, and perform curve correction and correction on the standard operation curve constructed by the preset flow-valve position standard ratio to obtain a first curve; A feedforward compensator is constructed according to the standard response data, and a first curve is linearly approximated according to a timestamp sequence based on the feedforward compensator to obtain an initial nonlinear influence degree of the feedforward compensator; A predictive nonlinear model is constructed based on the first curve and the initial nonlinear influence, and is matched and verified with the response data of all parameter types actually enabled to obtain the corrected linearization characteristics.

7. A method for linear deviation correction of a regulating valve according to claim 6, characterized in that: The correction linearization characteristics of the control valve are configured into the test, and the selective factor condition is enabled to adjust, and the final linearization characteristics are obtained and configured into the control valve correction strategy, including: Configure the feedforward correction linearization feature of any parameter type into the test environment, perform feedback control test of the parameter type, and obtain final response data; Acquire predicted response data based on the correction linearization characteristics, perform deviation analysis with the final response data, and acquire positive feedback adjustment parameters; The feedforward compensator is configured based on the positive feedback adjustment parameters, and the final linearization characteristics are obtained by reconfiguring with the correction linearization characteristics; Matching the final linearization characteristics to the system control parameters of the parameter type to generate a regulating valve correction strategy node; The strategy nodes of all parameter types are combined into a control valve correction strategy, and the stability of the correction strategy is verified. If the minimum stability is not met, re-adjustment is performed. Otherwise, the stability is monitored in real time, and dynamic adjustments are made in case of abnormalities.

8. A linear deviation correction system for a regulating valve, characterized in that: include: Initial data module: obtaining the factory information of the regulating valve according to the regulating valve history library, configuring a parameter sensor on the regulating valve, and obtaining the real-time parameter data of the regulating valve; Response data module: according to the central control device of the regulating valve, different parameter types are enabled to adjust the central control device to obtain the corresponding actual response data during the operation of the regulating valve; Standardization module: pre-process the real-time parameter data and actual response data of the control valve at the time node, obtain the standard parameter data and standard response data corresponding to the time, and build an actual output database; Correction module: Generates the actual operation curve according to the data of the actual output database, and performs correction processing with the standard operation curve obtained according to the factory information to obtain the correction linearization characteristics; Configuration module: configure the correction linearization characteristics of the control valve into the test, perform selective factor conditional activation adjustment, obtain the final linearization characteristics and configure them into the control valve correction strategy.

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