Signal calibration device, method and medium for mechanical position indication of electric gate valve

Abstract

The present invention discloses a signal calibration device, method and medium for the mechanical position indication of an electric gate valve, comprising an AC / DC electrical quantity sensor, a mechanical position indicator, a data core processing unit and a display unit, for collecting instantaneous values ​​of three-phase current during the operation of the electric gate valve; collecting a position indication signal of the electric gate valve; obtaining a first time interval T1=t2-t1; obtaining a second time interval T2=t3-t1; setting a judgment interval t, and when T2-T1≤t, outputting that the electric gate valve is in place; and when T2-T1>t, outputting that the electric gate valve is not in place. The present invention obtains characteristic information of the electric gate valve when the switch valve reaches a physical limit position by collecting and analyzing the form of electrical parameters of the instantaneous values ​​of the three-phase current of the electric gate valve, and simultaneously collects a mechanical position indication signal of the electric gate valve. The two are combined to satisfy a certain relationship, which is used as a judgment standard for judging whether the electric gate valve is in place, thereby realizing accurate calibration of the mechanical position indicator of the electric gate valve.

Description

Technical Field

[0001] The present invention relates to the field of valve control, and in particular to a signal calibration device, method and medium for mechanical position indication of an electric gate valve. Background Art

[0002] When the mechanical position indicator is used for the first time, the electric gate valve needs to be manually adjusted so that the electric gate valve can normally feedback the position indication signal of the electric gate valve when it is in the open and closed positions. As for how to judge whether the electric gate valve has reached the physical position, the existing method is to manually adjust the electric gate valve until it can normally feedback the switch position signal, and then control the electric gate valve through the control system to verify. At the same time, whether the valve can be "closed tightly" in the closed position is to check whether there is leakage before and after the electric gate valve is closed to the closed position signal feedback. This process is repeated to finally complete the debugging of the switch position signal of the electric gate valve. This method of adjusting and calibrating the mechanical position indicator of the electric gate valve has the following shortcomings:

[0003] (1) For the open position of the electric gate valve, only the feedback signal of the open position indicator is used to think that the electric gate valve has reached the fully open position, that is, the physical limit open position of the open position. However, in reality, after the open position signal of the electric gate valve is fed back, the electric gate valve has not reached the fully open physical limit position;

[0004] (2) For the closed position of the electric gate valve, the closed position signal fed back by the closed position position indicator sometimes cannot accurately reflect the actual physical position of the electric gate valve when it reaches the closed position, resulting in the electric gate valve being unable to "close" the electric gate valve;

[0005] (3) The traditional way of adjusting and calibrating the switch position indicator of the electric gate valve requires repeated adjustment of the electric gate valve, and repeatedly establishing a pressure difference before and after the electric gate valve to verify whether the electric gate valve is "closed", which brings inconvenience to adjustment and calibration. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the adjustment and correction process of the mechanical position indicator is complicated and inefficient. The purpose is to provide a signal calibration device, method and medium for the mechanical position indicator of an electric gate valve, so as to improve the adjustment and correction efficiency of the electric gate valve position indicator and reduce the difficulty of operation.

[0007] The present invention is achieved through the following technical solutions:

[0008] A signal calibration device for mechanical position indication of an electric gate valve, comprising:

[0009] AC and DC power sensors, which are used to collect the instantaneous values ​​of the three-phase current during the operation of the electric gate valve;

[0010] A mechanical position indicator, which is used to obtain a position indication signal of the electric gate valve;

[0011] The data processing core unit is used to analyze the instantaneous value of the three-phase current and the position indication signal, and determine whether the electric gate valve is in place;

[0012] The signal output end of the AC / DC power sensor is electrically connected to the data processing core unit through a signal isolation unit, and the signal output end of the mechanical position indicator is electrically connected to the data processing core unit through a signal isolation unit.

[0013] Furthermore, the signal calibration device further includes a display unit, which is electrically connected to the output end of the data processing core unit, and is used to output the judgment result.

[0014] Optionally, the acquisition speed of the AC / DC power sensor is not less than 2Ks / s.

[0015] A signal calibration method for a mechanical position indicator of an electric gate valve is based on the signal calibration device for a mechanical position indicator of an electric gate valve as described above. The signal calibration method includes:

[0016] Control the action of electric gate valve;

[0017] The instantaneous value of the three-phase current during the operation of the electric gate valve is collected through AC and DC power sensors;

[0018] The instantaneous value of the three-phase alternating current is transmitted to a data processing core unit, and the data processing core unit extracts an envelope curve of the instantaneous value of the three-phase current;

[0019] The position indication signal of the electric gate valve is collected through a mechanical position indicator;

[0020] Obtain a first time interval T1 = t2 - t1; obtain a second time interval T2 = t3 - t1; wherein t1 is the time when the electric gate valve starts to operate, t2 is the time when the data core unit obtains the feedback signal of the mechanical position indicator, and t3 is the time when the maximum current on the envelope curve increases to the set current;

[0021] Set the judgment interval t. When T2-T1≤t, the output electric gate valve switch is in place; when T2-T1>t, the output electric gate valve switch is not in place.

[0022] Optionally, the set current i is greater than the rated current I of the electric gate valve, and I<i<2I.

[0023] Optionally, the determination interval is 30-50 ms.

[0024] Furthermore, the signal calibration method further includes a data processing step, which includes:

[0025] Inputting the instantaneous values ​​of the three-phase currents into a signal isolation unit, and processing the instantaneous values ​​of the three-phase currents into AC current signals through the signal isolation unit;

[0026] And transmit the processed AC current signal to the data processing core unit.

[0027] Optionally, the AC current signal has an amplitude of 0-5V and a frequency of 50 Hz.

[0028] A computer-readable storage medium stores a computer program, which implements the steps of the above method when executed by a processor.

[0029] An electronic device comprising: at least one processor; and

[0030] a memory communicatively connected to the at least one processor; wherein,

[0031] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can: implement the steps of the method described above when executing.

[0032] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0033] The present invention provides AC and DC power sensors and mechanical position sensors to collect and analyze the instantaneous electrical parameters of the three-phase current of the electric gate valve, thereby obtaining characteristic information of the electric gate valve when the valve reaches the physical limit position. At the same time, the mechanical position indication signal of the electric gate valve is collected. The combination of the two satisfies a certain relationship and serves as a criterion for judging whether the electric gate valve is in the closed position, thereby achieving accurate calibration of the mechanical position indicator of the electric gate valve.

[0034] a) To achieve accurate calibration of the feedback position signal of the mechanical position indicator of the electric gate valve, and to determine whether the current mechanical position indicator signal of the electric gate valve has reached the physical limit position;

[0035] b) To judge whether the electric gate valve can be “closed” at the current closing position;

[0036] c) Obtain the real-time current curve of the electric gate valve during the entire opening and closing process, and collect the position signal fed back by the mechanical position indicator of the electric gate valve. By fusing the position signal with the electrical parameter signal, the time difference between the current position signal and the physical limit position of the electric gate valve can be quickly identified, providing certain support for subsequent manual adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification and do not constitute a limitation of the embodiments of the present invention.

[0038] Figure 1 It is a structural schematic diagram of a signal calibration device for mechanical position indication of an electric gate valve according to the present invention.

[0039] Figure 2 The figure is a flow chart of a signal calibration method for a mechanical position indication of an electric gate valve according to the present invention. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the relevant content and are not intended to limit the present invention.

[0041] It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

[0042] In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] Example 1

[0044] A signal calibration device for the mechanical position indication of an electric gate valve comprises an AC / DC electrical quantity sensor, a mechanical position indicator, a data core processing unit and a display unit.

[0045] AC / DC power sensors are used to collect the instantaneous three-phase current values ​​during the operation of electric gate valves. Their function is to detect current changes in the electric gate valve motor, thereby determining its operating status. Their basic principle is to convert current signals into measurable voltage signals for data processing and analysis.

[0046] The mechanical position indicator is used to obtain the position indication signal of the electric gate valve. It directly contacts the mechanical components of the electric gate valve to detect the open and closed status of the gate valve. Its signal output terminal is electrically connected to the data processing core unit through the signal isolation unit.

[0047] The data processing core unit is responsible for analyzing the instantaneous three-phase current values ​​and position indication signals to determine whether the electric gate valve is in place. It is also responsible for analyzing the instantaneous three-phase current values ​​collected by the AC and DC power sensors and the position indication signals obtained by the mechanical position indicator to determine whether the electric gate valve is in place. The data processing core unit correlates the instantaneous current values ​​with the position indication signals to determine the actual position status of the electric gate valve.

[0048] The display unit is used to output the judgment result. The display unit can be a liquid crystal display, an LED indicator light, etc., which is used to display the position status and calibration results of the electric gate valve in real time.

[0049] The signal output end of the AC / DC power sensor is electrically connected to the data processing core unit through the signal isolation unit, the signal output end of the mechanical position indicator is electrically connected to the data processing core unit through the signal isolation unit, and the display unit is electrically connected to the output end of the data processing core unit.

[0050] The acquisition speed of the AC / DC power sensor is no less than 2Ks / s, which means that the sensor can collect at least 2,000 data points per second, thereby improving the accuracy and response speed of signal acquisition.

[0051] Example 2

[0052] A signal calibration method for a mechanical position indicator of an electric gate valve is based on the above-mentioned signal calibration device for a mechanical position indicator of an electric gate valve. The signal calibration method includes:

[0053] Control the action of the electric gate valve; start the electric gate valve to open or close it.

[0054] The AC and DC power sensors are used to collect the instantaneous values ​​of the three-phase current during the operation of the electric gate valve. During the operation of the electric gate valve, the AC and DC power sensors monitor the instantaneous values ​​of the three-phase current of the motor in real time.

[0055] The instantaneous value of the three-phase alternating current is transmitted to the data processing core unit, and the data processing core unit extracts the envelope curve of the instantaneous value of the three-phase current; the collected instantaneous value of the three-phase current is transmitted to the data processing core unit for analysis, and the envelope curve of the current signal is extracted to observe the current change trend.

[0056] The position indication signal of the electric gate valve is collected through the mechanical position indicator; the mechanical position indicator monitors and obtains the position indication signal of the electric gate valve in real time.

[0057] Obtain a first time interval T1 = t2 - t1; obtain a second time interval T2 = t3 - t1; wherein t1 is the time when the electric gate valve starts to operate, t2 is the time when the data core unit obtains the feedback signal of the mechanical position indicator, and t3 is the time when the maximum current on the envelope curve increases to the set current;

[0058] Set the judgment interval t. When T2-T1≤t, the electric gate valve is output as being in position. When T2-T1>t, the electric gate valve is output as being not in position. By comparing the difference between T1 and T2 with the set judgment interval t, the electric gate valve is judged to have reached the specified position. If the difference is less than or equal to t, the gate valve is considered in position; otherwise, it is considered not in position.

[0059] When analyzing the envelope curve, a judgment threshold i can be set between the rated current I of the electric gate valve and 2 times the rated current. This helps to identify the open and closed states of the electric gate valve during the current change process. That is, the set current i is greater than the rated current I of the electric gate valve, and I<i<2I.

[0060] t is used to determine whether the mechanical position indicator's in-position signal is close to the gate's limit position. It is generally determined based on the time it takes for the electric gate valve to rotate one circle. Under normal circumstances, the judgment interval t can be selected to be 30-50ms. When the difference between the second time interval T2 and the first time interval T1 is within the range of 30-50ms, it can be considered that the electric gate valve has reached its in-position position. By setting an appropriate judgment interval, the accuracy and robustness of the signal calibration method can be improved to a certain extent.

[0061] In an electrical system, electrical interference may exist between various components, which may cause signal distortion or malfunction. Therefore, the signal calibration method also includes a data processing step, which includes:

[0062] The instantaneous values ​​of the three-phase currents are input into the signal isolation unit. In the signal calibration method, the collected instantaneous values ​​of the three-phase currents are first input into the signal isolation unit. The function of the signal isolation unit is to prevent electrical interference and improve signal stability.

[0063] The signal isolation unit processes the instantaneous value of the three-phase current into an AC current signal; the signal isolation unit processes the input instantaneous value of the three-phase current into an AC current signal to facilitate subsequent data processing and transmission.

[0064] And transmit the processed AC current signal to the data processing core unit.

[0065] In order to ensure the accuracy and stability of the signal in the data processing core unit, the AC current signal amplitude is 0-5V and the frequency is 50Hz.

[0066] At the same time, in practice, it is also necessary to process the output signal of the mechanical position indicator with a signal isolation unit.

[0067] The data processing step is to improve the accuracy, stability and reliability of the signal so that the data processing core unit can more accurately analyze and determine whether the electric gate valve is in place. This is of great significance for the calibration of the mechanical position indication signal of the electric gate valve.

[0068] Example 3

[0069] A computer-readable storage medium stores a computer program, which implements the steps of the above method when executed by a processor.

[0070] An electronic device comprising: at least one processor; and

[0071] a memory communicatively connected to at least one processor; wherein,

[0072] The memory stores instructions that can be executed by at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can: implement the steps of the above method when executing.

[0073] Without loss of generality, computer-readable media may include computer storage media and communication media. Computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instruction data structures, program modules, or other data. Computer storage media includes RAM, ROM, EPROM, EEPROM, flash memory or other solid-state storage technologies, CD-ROM, DVD or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices. Of course, those skilled in the art will appreciate that computer storage media is not limited to the aforementioned types. The aforementioned system memory and mass storage devices may be collectively referred to as memory.

[0074] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0076] It should be understood by those skilled in the art that the above embodiments are merely for the purpose of illustrating the present invention clearly, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above invention, and these changes or modifications are still within the scope of the present invention.

Claims

1. A signal calibration method for the mechanical position indication of an electric gate valve, characterized in that: A signal calibration device based on the mechanical position indication of an electric gate valve, the signal calibration device comprising: AC and DC power sensors, which are used to collect the instantaneous values ​​of the three-phase current during the operation of the electric gate valve; A mechanical position indicator, which is used to obtain a position indication signal of the electric gate valve; The data processing core unit is used to analyze the instantaneous value of the three-phase current and the position indication signal, and determine whether the electric gate valve is in place; The signal output end of the AC / DC power sensor is electrically connected to the data processing core unit through a signal isolation unit, and the signal output end of the mechanical position indicator is electrically connected to the data processing core unit through a signal isolation unit; The signal calibration method comprises: Control the action of electric gate valve; The instantaneous value of the three-phase current during the operation of the electric gate valve is collected through AC and DC power sensors; The instantaneous value of the three-phase alternating current is transmitted to a data processing core unit, and the data processing core unit extracts an envelope curve of the instantaneous value of the three-phase current; The position indication signal of the electric gate valve is collected through a mechanical position indicator; Obtain a first time interval T1 = t2 - t1; obtain a second time interval T2 = t3 - t1; wherein t1 is the time when the electric gate valve starts to operate, t2 is the time when the data core unit obtains the feedback signal of the mechanical position indicator, and t3 is the time when the maximum current on the envelope curve increases to the set current; Set the judgment interval t. When T2-T1≤t, the output electric gate valve switch is in place; when T2-T1>t, the output electric gate valve switch is not in place.

2. A signal calibration method for mechanical position indication of an electric gate valve according to claim 1, characterized in that: The set current i is greater than the rated current I of the electric gate valve, and I<i<2I.

3. The signal calibration method for the mechanical position indication of an electric gate valve according to claim 1, characterized in that: The judgment interval is 30-50ms.

4. The signal calibration method for the mechanical position indication of an electric gate valve according to claim 1, characterized in that: It also includes data processing steps, which include: Inputting the instantaneous values ​​of the three-phase currents into a signal isolation unit, and processing the instantaneous values ​​of the three-phase currents into AC current signals through the signal isolation unit; And transmit the processed AC current signal to the data processing core unit.

5. The signal calibration method for the mechanical position indication of an electric gate valve according to claim 1, characterized in that: The AC current signal amplitude is 0-5V and the frequency is 50Hz.

6. The signal calibration method for the mechanical position indication of an electric gate valve according to claim 1, characterized in that: The signal calibration device further includes a display unit, which is electrically connected to the output end of the data processing core unit and is used to output the judgment result.

7. The signal calibration method for the mechanical position indication of an electric gate valve according to claim 1, characterized in that: The acquisition speed of the AC / DC electrical quantity sensor is not less than 2Ks / s.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

9. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can: implement the steps of the method according to any one of claims 1 to 7 when executed.

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