Reference sampling determination method, system and valve positioner for valve positioner

Abstract

The application relates to the technical field of valve positioners, and provides a reference sampling determination method and system for a valve positioner and the valve positioner. The application obtains a reference sampling value of an original positioner at a reference stroke position, a first sampling value of the original positioner at a target stroke position, and calculates the first sampling value according to a second sampling value of a target positioner at the target stroke position to obtain a sampling compensation value if the original positioner is replaced by the target positioner. The reference sampling value of the original positioner at the reference stroke position is calculated according to the sampling compensation value to obtain a target sampling value of the target positioner at the reference stroke position. The reference sampling value of the original positioner at the reference stroke position is compensated according to the sampling difference between the target stroke position and the original positioner and the target positioner to determine the target sampling value of the target positioner at the reference stroke position. The target positioner no longer needs to execute a self-tuning program, and the replacement difficulty of the valve positioner is reduced.

Description

Technical Field

[0001] This application relates to the field of valve positioner technology, specifically to a reference sampling determination method, system, and valve positioner for valve positioners. Background Technology

[0002] In the field of industrial automation control, valve positioners serve as the control core of regulating valves, responsible for receiving commands from the control system and precisely driving valve movements. However, since valve positioners typically operate in harsh industrial environments with high temperatures, high humidity, vibration, or electromagnetic interference, their electronic and mechanical components are at risk of aging, failure, or damage. When a damaged valve positioner is replaced, the new valve positioner needs to perform a self-tuning program. This involves controlling the regulating valve to perform several full-stroke movements from fully closed to fully open, allowing the valve positioner to learn the reference sampling parameters and determine the full stroke range of the regulating valve before it can perform normal control tasks.

[0003] However, in many critical industrial processes, the opening degree of control valves cannot change drastically, otherwise it will cause drastic fluctuations in process parameters, disrupting the stability and continuity of the production process. As a result, after replacing the valve positioners at these control valve nodes, the valve positioners cannot perform the necessary self-tuning procedures, increasing the difficulty of replacing the valve positioners. Summary of the Invention

[0004] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0005] In view of the shortcomings of the prior art described above, this application provides a reference sampling determination method, system and valve positioner for valve positioners, so as to reduce the difficulty of replacing valve positioners.

[0006] This application provides a reference sampling determination method for a valve positioner, applied to a target positioner. The reference sampling determination method for a valve positioner includes: obtaining original sampling values ​​of an original positioner, wherein the original sampling values ​​include a reference sampling value of the original positioner at a reference stroke position and a first sampling value of the original positioner at a target stroke position; if the original positioner is replaced by the target positioner, obtaining a second sampling value of the target positioner at the target stroke position, and calculating a sampling compensation value based on the first sampling value and the second sampling value; calculating the reference sampling value based on the sampling compensation value to obtain a target sampling value of the target positioner at the reference stroke position, so as to control the valve opening according to the target sampling value.

[0007] In one embodiment of this application, obtaining the original sampled value of the original locator includes any one of the following: receiving the original sampled value of the original locator through a user input module set in the target locator; establishing a communication link between the target locator and the original locator through a communication module set in the target locator, so as to receive the original sampled value sent by the original locator through the communication link.

[0008] In one embodiment of this application, the reference sampling determination method for a valve positioner further includes at least one of the following: if the first sampled value is within a preset abnormal sampling interval, an abnormal notification corresponding to the first sampled value is generated; if the reference sampled value is within the abnormal sampling interval, an abnormal notification corresponding to the reference sampled value is generated.

[0009] In one embodiment of this application, the sampling compensation value is calculated based on the first sample value and the second sample value, including: if there are multiple target travel positions, the sub-compensation value corresponding to each target travel position is calculated based on the second sample value and the first sample value corresponding to the same target travel position; and the average value of each sub-compensation value is calculated to determine the sampling compensation value.

[0010] In one embodiment of this application, the reference sampling determination method for the valve positioner further includes: if the target sample value is within a preset abnormal sampling range, then generating an abnormal notification corresponding to the target sample value.

[0011] This application also provides a valve positioner replacement method, comprising: obtaining a reference sample value of the original positioner at a reference stroke position, and sampling the position of the proportional arm of the original positioner when the proportional arm of the original positioner is at a target stroke position to obtain a first sample value; replacing the original positioner with a target positioner; inputting the reference sample value of the original positioner at the reference stroke position and the first sample value of the original positioner at the target stroke position as the original sample value into the target positioner, and controlling the target positioner to execute the reference sampling determination method for valve positioners as described in any one of claims 1-5.

[0012] In one embodiment of this application, replacing the original positioner with a target positioner includes: the original positioner being connected to a regulating valve; adjusting the position of the proportional arm pin of the target positioner according to the position of the proportional arm pin of the original positioner; and replacing the original positioner with the target positioner while maintaining a consistent valve opening of the regulating valve.

[0013] In one embodiment of this application, inputting the reference sample value of the original positioner at the reference stroke position and the first sample value of the original positioner at the target stroke position as the original sample value into the target position includes: obtaining positioner replacement data of the original positioner through a menu page set on the original positioner, wherein the positioner replacement data includes the reference sample value of the original positioner at the reference stroke position, the first sample value of the original positioner at the target stroke position, the valve fully open time, the valve fully closed time, the valve direction, and the valve type; and inputting the obtained positioner replacement data into the target positioner.

[0014] This application also provides a reference sampling determination system for a valve positioner, comprising: an acquisition module for acquiring original sampling values ​​of an original positioner, wherein the original sampling values ​​include a reference sampling value of the original positioner at a reference stroke position and a first sampling value of the original positioner at a target stroke position; a first calculation module for acquiring a second sampling value of the target positioner at the target stroke position if the original positioner is replaced by the target positioner, and calculating a sampling compensation value based on the first sampling value and the second sampling value; and a second calculation module for calculating the reference sampling value based on the sampling compensation value to obtain a target sampling value of the target positioner at the reference stroke position, so as to control the valve opening according to the target sampling value.

[0015] This application also provides a valve positioner, including: a processor and a memory; the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory to cause the valve positioner to perform the method described above.

[0016] The beneficial effects of this application are:

[0017] By acquiring the baseline sample value of the original positioner at the reference stroke position and the first sample value of the original positioner at the target stroke position, if the original positioner is replaced by the target positioner, the first sample value is calculated based on the second sample value of the target positioner at the target stroke position to obtain a sampling compensation value. This compensation value is then used to calculate the baseline sample value of the original positioner at the reference stroke position, thus obtaining the target sample value of the target positioner at the reference stroke position. In this way, based on the sampling difference between the target positioner and the original positioner at the target stroke position, the baseline sample value of the original positioner at the reference stroke position is compensated, and the target sample value of the target positioner at the reference stroke position is determined. This eliminates the need for the target positioner to perform a self-tuning procedure, thereby reducing the difficulty of replacing the valve positioner. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] In the attached diagram:

[0020] Figure 1 This is a flowchart illustrating a reference sampling determination method for a valve positioner in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the structure of a valve positioner in one embodiment of this application;

[0022] Figure 3 This is a flowchart illustrating a valve positioner replacement method in an embodiment of this application.

[0023] Figure 4 This is a schematic diagram illustrating the connection relationship between a regulating valve and a valve positioner in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the rotation of a proportional arm in an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of a proportional arm pin in one embodiment of this application;

[0026] Figure 7 This is a schematic diagram of a reference travel position and a target travel position in an embodiment of this application;

[0027] Figure 8 This is a schematic diagram of a reference sampling determination system for a valve positioner in an embodiment of this application. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present application. However, it will be apparent to those skilled in the art that embodiments of the present application may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present application.

[0031] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0032] Unless otherwise stated, the term "multiple" means two or more.

[0033] In this application, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0034] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0035] Combination Figure 1 As shown, this application provides a reference sampling determination method for a valve positioner, applied to a target positioner. The reference sampling determination method for a valve positioner includes:

[0036] Step S101: Obtain the original sampled values ​​of the original locator;

[0037] The original sampled values ​​include the reference sampled value of the original locator at the reference travel position and the first sampled value of the original locator at the target travel position.

[0038] The reference travel position includes the fully open position and / or the fully closed position;

[0039] Step S102: If the original locator is replaced by the target locator, then obtain the second sample value of the target locator at the target travel position;

[0040] Step S103: Calculate the sampling compensation value based on the first and second sampled values;

[0041] Step S104: Calculate the reference sample value based on the sample compensation value to obtain the target sample value of the target positioner at the reference stroke position, so as to control the valve opening according to the target sample value.

[0042] The reference sampling determination method for valve positioners provided in this application obtains the reference sample value of the original positioner at the reference stroke position and the first sample value of the original positioner at the target stroke position. If the original positioner is replaced by the target positioner, the first sample value is calculated based on the second sample value of the target positioner at the target stroke position to obtain a sampling compensation value. This compensation value is then used to calculate the reference sample value of the original positioner at the reference stroke position, thus obtaining the target sample value of the target positioner at the reference stroke position. In this way, by compensating for the reference sample value of the original positioner at the reference stroke position based on the sampling difference between the target positioner and the original positioner at the target stroke position, the target sample value of the target positioner at the reference stroke position is determined. This eliminates the need for the target positioner to perform a self-tuning procedure, thereby reducing the difficulty of replacing the valve positioner.

[0043] Combination Figure 2 As shown, this application provides a valve positioner, including a central processing module, a power supply module, a control module, an analog-to-digital converter, a valve position sensor, an electro-pneumatic converter, a pneumatic control unit, a pulse width modulation unit, a feedback output unit, a communication module, and a display module.

[0044] The Central Processing Unit (CPU) receives digital signals from the analog-to-digital converter and instructions from the communication module; executes the core PID closed-loop control algorithm, which compares the "target position" with the "actual position," calculates the deviation, and calculates different drive currents based on the PID algorithm; issues instructions to various execution and interface units; and manages advanced functions such as communication, diagnostics, self-tuning, and alarms for the entire device.

[0045] The power module provides a stable and reliable power supply for all electronic components inside the positioner.

[0046] The control module is used to condition and convert the 4-20mA signal from the power supply module.

[0047] The analog-to-digital conversion unit converts the control target signal processed by the control module into a digital value that the central processing module can read, or converts the actual valve position feedback signal from the valve position sensor into a digital value that the central processing module can read.

[0048] A valve position sensor is used to measure the physical displacement of the valve stem, i.e., the current actual opening degree of the valve, and converts the mechanical displacement into a continuously changing analog electrical signal.

[0049] An electro-pneumatic conversion unit is used to receive control signals and convert them into pneumatic pressure signals to drive the pneumatic regulating unit to intake or exhaust air.

[0050] A pneumatic control unit, including a diaphragm or piston, is used to drive a valve stem to move according to a pneumatic pressure signal, thereby changing the valve opening.

[0051] The pulse width modulation unit is used to generate a square wave signal with a duty cycle proportional to the valve position based on the measured valve position.

[0052] The feedback output unit is used to filter and smooth the square wave signal, convert it back into a stable analog voltage, and then drive a constant current source to generate a standard 4-20mA analog current signal output to reflect the actual state of the valve.

[0053] The communication module is used to receive unit selection instructions and / or diagnostic start instructions sent by the user terminal.

[0054] The display module is used to prompt the user about the abnormal operating condition of the analog-to-digital conversion unit, and / or to receive user input of unit selection instructions and / or diagnostic start instructions through a preset menu page.

[0055] In some embodiments, the valve positioner further includes a watchdog module for resetting and restarting the system in the event of a system crash or program malfunction.

[0056] Optionally, the original sampled value of the original locator is obtained by any of the following: receiving the original sampled value of the original locator through a user input module set in the target locator; or establishing a communication link between the target locator and the original locator through a communication module set in the target locator, so as to receive the original sampled value sent by the original locator through the communication link.

[0057] In some embodiments, parameters related to valve opening control in the original positioner are read through menu page output or communication transmission, and then the read parameters are input into the new target positioner through menu page input or communication transmission. However, when replacing the valve positioner, it is impossible to quantify the installation error between the valve positioner and the control valve, the installation angle of the valve position sensor in the valve positioner, etc., which makes it impossible for simple parameter copying to achieve the target positioner to control the opening of the control valve.

[0058] In some embodiments, the data acquired by the target locator from the original locator includes a first sample value Level_Data_Old, a reference sample value Open_Data_Old of the original locator in the fully open position, and a reference sample value Close_Data_Old of the original locator in the fully closed position.

[0059] In some embodiments, the target locator includes a second sample value Level_Data_New, a target sample value Open_Data_New for the target locator in the fully open position, and a target sample value Close_Data_New for the target locator in the fully closed position.

[0060] Optionally, the reference sampling determination method for the valve positioner further includes at least one of the following: if the first sample value is in a preset abnormal sampling interval, an abnormal notification corresponding to the first sample value is generated; if the reference sample value is in an abnormal sampling interval, an abnormal notification corresponding to the reference sample value is generated.

[0061] In some embodiments, the maximum value of the abnormal sampling interval is represented as AD_Max, and the minimum value of the abnormal sampling interval is represented as AD_Min.

[0062] In some embodiments, if the first sampled value Level_Data_Old is between AD_Max and AD_Min, it indicates that the first sampled value Level_Data_Old is within the normal range; otherwise, an exception notification corresponding to the first sampled value is generated.

[0063] In some embodiments, if the reference sample value Open_Data_Old of the original locator in the fully open position is between AD_Max and AD_Min, it indicates that the reference sample value Open_Data_Old of the original locator in the fully open position is within the normal range; otherwise, an abnormal notification corresponding to the reference sample value Open_Data_Old of the original locator in the fully open position is generated.

[0064] In some embodiments, if the reference sample value Close_Data_Old of the original locator in the fully open position is between AD_Max and AD_Min, it indicates that the reference sample value Close_Data_Old of the original locator in the fully open position is within the normal range; otherwise, an abnormal notification corresponding to the reference sample value Close_Data_Old of the original locator in the fully open position is generated.

[0065] Optionally, the sampling compensation value is calculated based on the first sample value and the second sample value, including: if there are multiple target travel positions, the sub-compensation value corresponding to each target travel position is calculated based on the second sample value and the first sample value corresponding to the same target travel position; the average value of each sub-compensation value is calculated to determine the sampling compensation value.

[0066] In some embodiments, the sampling compensation value Diff = Level_Data_Old - Level_Data_New is calculated based on the first sample value and the second sample value.

[0067] In some embodiments, the reference sample value is calculated based on the sample compensation value to obtain the target sample value of the target locator at the reference travel position. The target sample value includes the target sample value of the target locator at the fully open position (Open_Data_New=Open_Data_Old+Diff) and the target sample value of the target locator at the fully closed position (Close_Data_New=Close_Data_Old+Diff).

[0068] Optionally, the reference sampling determination method for the valve positioner further includes: if the target sample value is within a preset abnormal sampling range, generating an abnormal notification corresponding to the target sample value.

[0069] In some embodiments, if Open_Data_New is less than AD_Max and Close_Data_New is greater than or equal to AD_Min, it indicates that the target locator has been successfully replaced; otherwise, an exception notification corresponding to the target sample value is generated.

[0070] Combination Figure 3 As shown, this application provides a method for replacing a valve positioner, including:

[0071] Step S301: Obtain the reference sample value of the original locator at the reference stroke position, and sample the position of the proportional arm of the original locator when the proportional arm of the original locator is at the target stroke position to obtain the first sample value;

[0072] Step S302: Replace the original locator with the target locator;

[0073] Step S303: Input the reference sample value of the original locator at the reference travel position and the first sample value of the original locator at the target travel position as the original sample value into the target locator;

[0074] Step S304: Control the target positioner to execute the reference sampling determination method for valve positioners as described above.

[0075] The valve positioner replacement method provided in this application obtains the reference sample value of the original positioner at the reference stroke position and the first sample value of the original positioner at the target stroke position. If the original positioner is replaced with the target positioner, the first sample value is calculated based on the second sample value of the target positioner at the target stroke position to obtain a sampling compensation value. This compensation value is then used to calculate the reference sample value of the original positioner at the reference stroke position, thus obtaining the target sample value of the target positioner at the reference stroke position. In this way, by compensating for the reference sample value of the original positioner at the reference stroke position based on the sampling difference between the target positioner and the original positioner at the target stroke position, the target sample value of the target positioner at the reference stroke position is determined. This eliminates the need for the target positioner to perform a self-tuning procedure, thereby reducing the difficulty of valve positioner replacement.

[0076] Optionally, replacing the original positioner with the target positioner includes: the original positioner being connected to a regulating valve; adjusting the position of the proportional arm pin of the target positioner according to the position of the proportional arm pin of the original positioner; and replacing the original positioner with the target positioner while maintaining a consistent valve opening of the regulating valve.

[0077] In some embodiments, the connection relationship between the control valve and the valve positioner is as follows: Figure 4 As shown.

[0078] In some embodiments, the valve positioner controls the valve opening by rotating a proportional arm, as illustrated in the diagram below. Figure 5 As shown, the proportional arm pin is as follows: Figure 6 As shown, the reference travel position and the target travel position are as follows: Figure 7 As shown.

[0079] In some embodiments, the opening position of the control valve is fixed by a handwheel or other retainer to ensure consistent valve opening. The original positioner's positioner replacement data is read from its menu page. If the original positioner's screen cannot display correctly, the replacement data is read via a handheld device, upper-level system, or other means. The read positioner replacement data is saved. The power and air supply to the original positioner are disconnected, and the original positioner is removed from the control valve. The proportional arm pins of the target positioner and the original positioner are aligned, and the target positioner is installed on the control valve. Then, its air and power supplies are connected. The saved positioner replacement data is input into the target positioner, and the target positioner is controlled to execute the reference sampling determination method for valve positioners. The retainer used to fix the control valve is slowly released, and the target positioner is tested to see if it can control the valve opening.

[0080] Optionally, the reference sample value of the original positioner at the reference stroke position and the first sample value of the original positioner at the target stroke position are used as the original sample values ​​and input into the target positioner. This includes: obtaining the positioner replacement data of the original positioner through the menu page set on the original positioner, wherein the positioner replacement data includes the reference sample value of the original positioner at the reference stroke position, the first sample value of the original positioner at the target stroke position, the valve fully open time, the valve fully closed time, the valve direction, and the valve type; and inputting the obtained positioner replacement data into the target positioner.

[0081] As shown in Table 1, the positioner replacement data includes the first sample value (i.e., horizontal position sample), the reference sample value of the original positioner at the reference stroke position (i.e., fully open position sample and fully closed position sample), valve direction, and valve type.

[0082] Table 1

[0083]

[0084] In some embodiments, the target positioner receives positioner replacement data from the original positioner; reads control parameters from a preset database according to the valve type of the original positioner, wherein the control parameters include intake pulse width, exhaust pulse width, valve full opening time, valve full closing time, etc.; and implements valve opening control according to the read control parameters.

[0085] Combination Figure 8 As shown, this application provides a reference sampling determination system for a valve positioner, comprising:

[0086] The acquisition module is used to acquire the original sampled values ​​of the original locator, wherein the original sampled values ​​include the reference sampled value of the original locator at the reference travel position and the first sampled value of the original locator at the target travel position;

[0087] The first calculation module is used to obtain the second sample value of the target locator at the target travel position if the original locator is replaced by the target locator, and to calculate the sample compensation value based on the first sample value and the second sample value.

[0088] The second calculation module is used to calculate the reference sample value based on the sample compensation value to obtain the target sample value of the target positioner at the reference stroke position, so as to control the valve opening according to the target sample value.

[0089] The reference sampling determination system for valve positioners provided in this application acquires the reference sample value of the original positioner at the reference stroke position and the first sample value of the original positioner at the target stroke position. If the original positioner is replaced by the target positioner, the first sample value is calculated based on the second sample value of the target positioner at the target stroke position to obtain a sampling compensation value. This compensation value is then used to calculate the reference sample value of the original positioner at the reference stroke position, thus obtaining the target sample value of the target positioner at the reference stroke position. In this way, by compensating for the reference sample value of the original positioner at the reference stroke position based on the sampling difference between the target and original positioners at the target stroke position, the target sample value of the target positioner at the reference stroke position is determined. This eliminates the need for the target positioner to perform a self-tuning procedure, thereby reducing the difficulty of replacing the valve positioner.

[0090] This application also provides a valve positioner, including the aforementioned reference sampling determination method for a valve positioner.

[0091] The valve positioner disclosed in this embodiment includes a processor, a memory, a transceiver, and a communication interface. The memory and communication interface are connected to the processor and transceiver and enable communication between them. The memory stores a computer program, the communication interface performs communication, and the processor and transceiver run the computer program, causing the valve positioner to execute the various steps of the method described above. The above description and drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operation may vary. Parts and subsamples of some embodiments may be included in or replace parts and subsamples of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated subsamples, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other subsamples, wholes, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes the element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0092] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0093] The methods and products disclosed in the embodiments herein (including but not limited to devices and equipment) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some sub-samples may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to implement this embodiment according to actual needs. Furthermore, the functional units in this application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0094] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of the systems, methods, and computer program products according to this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than those disclosed in the description; sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A reference sampling determination method for a valve positioner, characterized in that, The reference sampling determination method for the valve positioner, applied to the target positioner, includes: Obtain the original sampled values ​​of the original locator, wherein the original sampled values ​​include the reference sampled value of the original locator at the reference travel position and the first sampled value of the original locator at the target travel position; If the original locator is replaced by the target locator, then the second sample value of the target locator at the target travel position is obtained, and a sample compensation value is calculated based on the first sample value and the second sample value. The reference sample value is calculated based on the sample compensation value to obtain the target sample value of the target positioner at the reference stroke position, so as to control the valve opening according to the target sample value.

2. The reference sampling determination method for a valve positioner according to claim 1, characterized in that, Obtain the raw sample values ​​of the original locator, including any of the following: The user input module set in the target locator receives the original sampled value from the original locator; A communication link is established between the target locator and the original locator through a communication module installed in the target locator, so as to receive the original sampled values ​​sent by the original locator through the communication link.

3. The reference sampling determination method for a valve positioner according to claim 1, characterized in that, The reference sampling determination method for valve positioners further includes at least one of the following: If the first sampled value is within a preset abnormal sampling range, an abnormal notification corresponding to the first sampled value is generated. If the benchmark sampled value is within the abnormal sampling range, an abnormal notification corresponding to the benchmark sampled value is generated.

4. The reference sampling determination method for a valve positioner according to claim 1, characterized in that, The sampling compensation value is calculated based on the first sample value and the second sample value, including: If there are multiple target travel positions, the sub-compensation values ​​corresponding to each target travel position are calculated based on the second sample value and the first sample value corresponding to the same target travel position. The average value of each sub-compensation value is calculated to determine the sampling compensation value.

5. The reference sampling determination method for a valve positioner according to any one of claims 1 to 4, characterized in that, The reference sampling determination method for valve positioners further includes: If the target sampled value is within a preset abnormal sampling range, an abnormal notification corresponding to the target sampled value is generated.

6. A method for replacing a valve positioner, characterized in that, include: Obtain the reference sample value of the original locator at the reference stroke position, and when the proportional arm of the original locator is at the target stroke position, sample the position of the proportional arm of the original locator to obtain the first sample value; Replace the original locator with the target locator; The reference sample value of the original positioner at the reference stroke position and the first sample value of the original positioner at the target stroke position are input as the original sample value into the target positioner, and the target positioner is controlled to perform the reference sampling determination method for valve positioners as described in any one of claims 1-5.

7. The valve positioner replacement method according to claim 6, characterized in that, Replacing the original locator with the target locator includes: The original positioner is connected to a regulating valve; The position of the proportional arm pin of the target locator is adjusted according to the position of the proportional arm pin of the original locator. Maintaining a consistent valve opening, replace the original positioner with the target positioner.

8. The valve positioner replacement method according to claim 6 or 7, characterized in that, The reference sample value of the original locator at the reference travel position and the first sample value of the original locator at the target travel position are input as the original sample values ​​into the target locator, including: The positioner replacement data of the original positioner is obtained by setting the menu page of the original positioner. The positioner replacement data includes the reference sample value of the original positioner at the reference stroke position, the first sample value of the original positioner at the target stroke position, the valve fully open time, the valve fully closed time, the valve direction, and the valve type. The obtained locator replacement data is input into the target locator.

9. A reference sampling and determination system for a valve positioner, characterized in that, include: The acquisition module is used to acquire the original sampled values ​​of the original locator, wherein the original sampled values ​​include the reference sampled value of the original locator at the reference travel position and the first sampled value of the original locator at the target travel position; The first calculation module is used to obtain a second sample value of the target locator at the target travel position if the original locator is replaced by the target locator, and to calculate a sample compensation value based on the first sample value and the second sample value. The second calculation module is used to calculate the reference sample value based on the sample compensation value to obtain the target sample value of the target positioner at the reference stroke position, so as to control the valve opening according to the target sample value.

10. A valve positioner, characterized in that, include: Processor and memory; The memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory to cause the valve positioner to perform the method as described in any one of claims 1-5.

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