Valve opening indication method and system

Abstract

The present invention discloses a method and system for regulating valve opening. The method comprises: initializing the valve to determine the corresponding relationship between the valve rotation angle and rotation direction and the valve opening; calculating the target angle and target direction that the valve needs to rotate when adjusting the valve from the initial opening to the target opening; and operating the valve to rotate the valve in the target direction by the target angle to achieve the target opening. By applying the method of the embodiment of the present invention, the valve opening can be monitored in real time without modifying the existing valve, which not only saves equipment investment but is also particularly important for safe production.

Description

Technical Field

[0001] The present invention belongs to the technical field of valve control, and in particular relates to a valve opening indication method and system. Background Art

[0002] Valves are control components in fluid conveying systems, performing functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, flow diversion, or overflow pressure relief. Valves can be used to control the flow of various fluids, including air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. Valves are widely used in many industries, including industrial manufacturing, chemical industry, water supply, fire protection, and energy, to open, close, and adjust the opening of certain valves as needed.

[0003] In practice, the actual operating status of the valve is out of sync with the operating status recorded in the system. Users can only measure the valve's rotation angle using a gyroscope, but cannot further determine the valve's actual operating status. For various reasons, since valve status is directly related to key indicators such as pipeline patency and fluid flow within the pipeline, valve status not only affects urban operations but can also lead to low production efficiency and even safety accidents. Summary of the Invention

[0004] The technical problem to be solved by the present invention is how to monitor the opening of a valve in real time and enable the user to adjust the opening of the valve. In response to the above problem, the present invention provides a valve opening adjustment method and system.

[0005] In a first aspect, an embodiment of the present invention provides a method for adjusting valve opening, the method comprising:

[0006] Initialize the valve to determine the corresponding relationship between the valve rotation angle and rotation direction and the valve opening:

[0007] Calculating the target angle and target direction that the valve needs to rotate when adjusting the valve from the initial opening to the target opening;

[0008] The valve is operated to rotate the valve in a target direction by the target angle to achieve the target opening.

[0009] According to an embodiment of the present invention, preferably, initializing the valve to determine the corresponding relationship between the valve rotation angle and rotation direction and the valve opening includes:

[0010] Rotating the valve in a first direction by a preset angle so that the angle of the valve reaches the first angle from the initial angle and the opening of the valve reaches the first opening from the initial opening;

[0011] Calculating the corresponding relationship between the rotation angle and rotation direction of the valve and the valve opening according to the initial opening, the first opening, the initial angle and the first angle;

[0012] The preset angle is not less than 360 degrees.

[0013] According to an embodiment of the present invention, preferably, operating the valve to rotate the valve in a target direction by the target angle to achieve the target opening includes:

[0014] Obtaining an actual rotation angle of the valve;

[0015] When the actual rotation angle of the valve in the target direction reaches the target angle, the rotation of the valve is stopped.

[0016] According to an embodiment of the present invention, preferably, obtaining the actual rotation angle of the valve includes:

[0017] Obtaining magnetic flux collected by a three-axis magnetic sensor preset on the valve;

[0018] The actual rotation angle of the valve is calculated according to the magnetic flux.

[0019] According to an embodiment of the present invention, preferably, obtaining the magnetic flux collected by a three-axis magnetic sensor preset on the valve includes:

[0020] rotating the valve;

[0021] Identify the magnetic flux values corresponding to the two coordinate axes that have changed in the three-dimensional coordinate system corresponding to the magnetic flux;

[0022] The magnetic fluxes corresponding to the two changed coordinate axes are corrected to obtain corrected magnetic fluxes.

[0023] According to an embodiment of the present invention, preferably, calculating the actual rotation angle of the valve according to the magnetic flux includes:

[0024] The actual rotation angle of the valve is calculated according to the corrected magnetic flux.

[0025] According to an embodiment of the present invention, preferably, correcting the changed magnetic fluxes of the two coordinate axes to obtain the corrected magnetic fluxes includes:

[0026] Calculate the magnetic flux correction values corresponding to the two coordinate axes that have changed;

[0027] The magnetic flux collected by the three-axis magnetic sensor is multiplied by the factory coefficient, and the magnetic flux correction value is subtracted to obtain the corrected magnetic flux.

[0028] According to an embodiment of the present invention, preferably, a calculation formula for calculating the actual rotation angle of the valve according to the magnetic flux is as follows:

[0029]

[0030] Where θ represents the valve rotation angle.

[0031] According to an embodiment of the present invention, preferably, a nine-axis gyroscope is provided on the valve, and a three-axis magnetic sensor for collecting magnetic flux is provided in the nine-axis gyroscope.

[0032] In a second aspect, the present invention provides a valve opening adjustment system, the system comprising:

[0033] An initialization module is used to initialize the valve to determine the corresponding relationship between the valve rotation angle and rotation direction and the valve opening:

[0034] a calculation module, configured to calculate a target angle and a target direction in which the valve needs to rotate when the valve is adjusted from an initial opening to a target opening;

[0035] The operating module is used to operate the valve to rotate the valve in a target direction by a target angle to achieve the target opening.

[0036] Compared with the prior art, one or more embodiments of the above scheme may have the following advantages or beneficial effects: the valve is initialized to determine the correspondence between the valve rotation angle and rotation direction and the valve opening, and then the target angle and target direction that the valve needs to rotate to when the valve is adjusted from the initial opening to the target opening are calculated, and then the valve is operated to rotate the target angle along the target direction to achieve the target opening.

[0037] By applying the method of the embodiment of the present invention, the valve opening can be monitored in real time without modifying the existing valve, which not only saves equipment investment but is also particularly important for safe production.

[0038] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0040] Figure 1A flow chart of a valve opening adjustment method according to a first embodiment of the present invention is shown;

[0041] Figure 2 A flow chart showing initialization of a valve according to a second embodiment of the present invention is shown;

[0042] Figure 3 A flowchart of real-time monitoring of valve opening according to the third embodiment of the present invention is shown;

[0043] Figure 4 A schematic diagram showing magnetic flux corresponding to each coordinate axis in a three-dimensional coordinate system according to a third embodiment of the present invention is shown;

[0044] Figure 5 A schematic diagram of a valve opening adjustment system according to a fourth embodiment of the present invention is shown. DETAILED DESCRIPTION

[0045] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings and examples, so that the present invention can fully understand how to apply technical means to solve technical problems and achieve technical effects, and thus implement the invention accordingly. It should be noted that, as long as no conflict exists, the various embodiments of the present invention and the various features of the embodiments can be combined with each other, and the resulting technical solutions are all within the scope of protection of the present invention.

[0046] Example 1

[0047] In order to solve the above technical problems existing in the prior art, an embodiment of the present invention provides a valve opening adjustment method. Figure 1 The flow chart of the valve opening adjustment method is shown. Figure 1 The valve opening adjustment method of this embodiment includes the following steps:

[0048] S101, initializing the valve to determine the corresponding relationship between the valve rotation angle and rotation direction and the valve opening.

[0049] When a valve leaves the factory, its initial angle is not zero. Furthermore, after the valve is opened to 100%, it can be rotated several more times, but the valve opening has reached its maximum and will not change. Similarly, after the valve opening is adjusted to 0%, it can be rotated several more times, but the valve will be closed and will not change. For example, after rotating the valve two times, or 720 degrees, the opening becomes 0%, while after rotating it 10 times, or 3600 degrees, the opening becomes 50%. The corresponding relationship between angle and opening can be calculated based on the difference between the angle and the opening.

[0050] S102, calculating a target angle and a target direction that the valve needs to rotate when the valve is adjusted from an initial opening to a target opening.

[0051] In practice, the valve rotation angle does not indicate the direction of valve rotation; rather, it represents the difference between the angles before and after the valve rotation. This means that as the angle increases, the valve opening may increase or decrease. However, this change can be used to determine the direction of valve rotation. For example, if the angle increases and the valve opening increases, the user can rotate the valve in the direction of the increasing angle to increase the valve opening.

[0052] S102 , operating the valve to rotate the valve in a target direction by the target angle to achieve the target opening.

[0053] Compared with the prior art, one or more embodiments of the above scheme may have the following advantages or beneficial effects: the valve is initialized to determine the correspondence between the valve rotation angle and rotation direction and the valve opening, and then the target angle and target direction that the valve needs to rotate to when the valve is adjusted from the initial opening to the target opening are calculated, and then the valve is operated to rotate the target angle along the target direction to achieve the target opening.

[0054] By applying the method of the embodiment of the present invention, the valve opening can be monitored in real time without modifying the existing valve, which not only saves equipment investment but is also particularly important for safe production.

[0055] Example 2

[0056] In order to solve the above technical problems existing in the prior art, the embodiment of the present invention introduces a valve opening adjustment method in more detail. Figure 2 Figure 1 shows a flow chart for initializing the valve. Figure 2 As shown in the figure, initializing the valve mainly includes the following steps:

[0057] S201 , rotating the valve in a first direction by a preset angle, so that the angle of the valve reaches a first angle from an initial angle, and the opening of the valve reaches the first opening from the initial opening.

[0058] When the valve leaves the factory, its initial angle is not zero. For example, if the initial angle is 2000 degrees, the corresponding initial opening of the valve is 90%. When the valve is rotated to 4900 degrees, the opening of the valve becomes 10%.

[0059] After the valve is opened to 100%, it can be rotated several more times, but the valve opening has reached its maximum and the valve opening will not change. Similarly, after the valve opening is adjusted to 0%, it can still be rotated several more times, but the valve is closed and the opening will not change.

[0060] The preset angle here is not less than 360 degrees. If the valve rotation angle is too small, the value displayed by the counter may be too small, resulting in inaccurate calculation value. Therefore, the valve should be rotated at least one circle here.

[0061] Here, the counter displays the angle of valve rotation, but it is independent of the direction. For example, if the initial value of the counter is 2000 and the valve is rotated 360 degrees in one direction, the counter value will become 2360, but the valve opening may increase or decrease.

[0062] S202 , calculating a corresponding relationship between the rotation angle and rotation direction of the valve and the valve opening according to the initial opening, the first opening, the initial angle, and the first angle.

[0063] During the initialization process, when operating the valve for the first time, the operator can use the handheld instrument to set the initial opening of the valve, and then set the valve opening to the first opening.

[0064] For example, rotating a valve 10 times will change it from fully closed to fully open, that is, the opening is adjusted from 0% to 100%. Since one valve rotation is 360 degrees, the valve rotates a total of 3600 degrees. In reality, the valve can continue to rotate after being fully closed or fully open. For example, the valve may need to rotate a maximum of 20 times, for a total of 7200 degrees.

[0065] The operator sets the initial valve opening to 90% on the handheld instrument. The counter then displays the valve angle as 2000 degrees. The operator then begins to close the valve and adjusts the valve opening to 10%. The counter then displays the valve angle as 4900 degrees.

[0066] When the valve opening changes by 100%, the angle the valve needs to rotate is:

[0067] |(4900-2000) / (10%-90%)|=3625.

[0068] For every 1% adjustment of the opening, the valve needs to rotate by an angle of 3625 / 100=36.25.

[0069] Then, it can be calculated that the angle corresponding to 0% opening is 4900+36.25×10=5262.5; and the angle corresponding to 100% opening is 2000–36.25×(100-90)=1637.5.

[0070] Furthermore, the valve's rotation direction can be determined by the fact that the opening decreases as the rotation angle increases. That is, to increase the opening, rotate in the direction of decreasing the angle; to decrease the opening, rotate in the direction of increasing the angle.

[0071] From the above steps, the corresponding relationship between the angle and rotation direction and the opening can be obtained. Then, when operating the valve, the valve opening is: current opening = (5262.5-current angle) / 3625.

[0072] In addition, if the operator continues to rotate the valve after the opening reaches 100%, the valve angle can still be rotated by 1637.5 degrees (approximately 5 turns), which will not cause the counter to display an angle value less than 0 and cause data overflow.

[0073] Compared with the prior art, the above solution can calculate the corresponding relationship between the valve angle value displayed by the counter and the valve opening, and the calculation is simple and convenient.

[0074] Example 3

[0075] In order to solve the above technical problems existing in the prior art, the embodiment of the present invention introduces a valve opening adjustment method in more detail. Figure 3 The flow chart of real-time monitoring of valve opening is shown. Figure 3 The specific steps are as follows:

[0076] S301: Acquire the actual rotation angle of the valve.

[0077] Wherein, step S301 includes: A, obtaining the magnetic flux collected by the three-axis magnetic sensor preset on the valve; B, calculating the actual rotation angle of the valve according to the magnetic flux.

[0078] In addition, step A includes: a. rotating the valve; b. identifying the magnetic flux values corresponding to the two changed coordinate axes in the three-dimensional coordinate system corresponding to the magnetic flux; c. correcting the magnetic flux corresponding to the two changed coordinate axes to obtain the corrected magnetic flux.

[0079] According to the characteristic that the valve can be approximately rotated only in the horizontal plane when rotating, it is possible to obtain only the magnetic flux values of the two coordinate axes that change in the three-dimensional coordinate system corresponding to the magnetic flux.

[0080] In addition, step c includes: a', calculating the magnetic flux correction values corresponding to the two changed coordinate axes; b', multiplying the magnetic flux collected by the three-axis magnetic sensor by the factory coefficient and subtracting the magnetic flux correction value to obtain the corrected magnetic flux.

[0081]

[0082] The corrected magnetic flux per axis = the collected magnetic flux per axis × the factory coefficient - the correction value per axis (2).

[0083] In this embodiment, the factory coefficient of the three-axis magnetic sensor is 0.15. The factory coefficients of different three-axis magnetic sensors are provided by the manufacturer, and the coefficients of different sensors are not necessarily the same.

[0084] Since the valve can be approximated to rotate only in the horizontal plane, in the three-dimensional coordinate system corresponding to the magnetic flux, the magnetic flux only changes significantly on two of the coordinate axes. For example, the magnetic flux values corresponding to the x-axis and y-axis have obvious changes, while the value corresponding to the z-axis does not change much, so only the x-axis and y-axis need to be monitored. Figure 4 As shown, the magnetic flux values of the x-axis and y-axis are negative, and the magnetic flux of the z-axis is positive. To calculate the angle of valve rotation, it is necessary to reset the center lines of the waveforms corresponding to the x-axis and y-axis to zero, that is, to move the waveforms corresponding to the x-axis and y-axis upward, and the waveform corresponding to the z-axis downward. The values corresponding to the x-axis and y-axis need to be corrected, as shown in formula (1). When actually operating the valve, the actual magnetic flux collected needs to be subtracted from this correction value. The calculation method for the corrected value of each axis is shown in formula (2).

[0085] Accordingly, step B includes: calculating the actual rotation angle of the valve according to the corrected magnetic flux.

[0086] The calculation formula for calculating the actual rotation angle of the valve according to the magnetic flux is as follows:

[0087]

[0088] Where θ represents the valve rotation angle.

[0089] According to the result calculated by formula (3), 0 to 180 degrees is a positive number, and 181 to 360 degrees is a negative number. Therefore, if the calculated θ is less than 0 degrees, 360 degrees needs to be added to θ.

[0090] Since digital signals can only represent 0 and 1 in digital circuits, and there are no intermediate values, it is difficult to perform floating-point operations. For low-end main control chips, only the IEEE 754 standard can be used to perform floating-point operations through software, resulting in very slow speeds. Depending on the division accuracy requirements, hundreds or thousands of clocks may be required. In order to support floating-point operations, in other embodiments of the present invention, an intelligent detector can be used. The main control core used in the intelligent detector is based on the Arm Cortex-M4, an Arm architecture series chip with a built-in FPU floating-point operation unit, which is designed to perform fast calculations through hardware. Arm's FPU function library does not support tan -1 function (atan or atan2), so tan needs to be calculated by other means (only addition, subtraction, multiplication and division) -1The approximate value of is shown in formula (4). Then, according to different value ranges, different values are added or subtracted to the approximate value to calculate the angle θ, as shown in formulas (5) to (11)

[0091] tan -1 (a)≈0.97239411·a-0.19194795·a 3 (4)

[0092]

[0093]

[0094]

[0095]

[0096]

[0097]

[0098]

[0099] Note that in formulas (5) to (9), x is not equal to 0.

[0100] S302: When the actual rotation angle of the valve along the target direction reaches the target angle, stop rotating the valve.

[0101] According to the initialization, if the larger the opening, the larger the value displayed on the counter, it means that the larger the value, the larger the opening. At this time, if you want to open the valve, rotate in the direction of increasing the value; if you want to close the valve, rotate in the direction of decreasing the value.

[0102] The valve is equipped with a nine-axis gyroscope, which contains a three-axis magnetic sensor for collecting magnetic flux. The gyroscope's central processing unit (CPU) can directly read the magnetic flux. As the operator rotates the valve, the CPU identifies which two axes in the three-dimensional coordinate system corresponding to the magnetic flux change. Generally, the Z axis does not change much.

[0103] Compared with the existing technology, in the above scheme, when actually monitoring the valve opening, a nine-axis gyroscope can be set on the valve without making other modifications to the valve, and the valve can be monitored while being rotated, which is more efficient.

[0104] Example 4

[0105] In order to solve the above technical problems existing in the prior art, an embodiment of the present invention further provides a valve opening adjustment system. Figure 5 The structure diagram of the valve opening adjustment system 50 is shown in FIG. Figure 5 The valve opening adjustment system 50 of this embodiment includes:

[0106] Initialization module 501 is used to initialize the valve to determine the corresponding relationship between the valve rotation angle and rotation direction and the valve opening:

[0107] A calculation module 502 is used to calculate the target angle and target direction that the valve needs to rotate when the valve is adjusted from the initial opening to the target opening;

[0108] The operating module 503 is configured to operate the valve to rotate the valve in a target direction by a target angle to achieve the target opening.

[0109] The valve opening adjustment system of this embodiment corresponds to the valve opening adjustment method of embodiment 1, and uses the initialization module 501, the calculation module 502 and the operation module 503 to monitor the valve opening to achieve the technical effect of embodiment 1, which will not be repeated here.

[0110] Although the embodiments disclosed herein are as described above, the contents described herein are merely embodiments for facilitating understanding of the present invention and are not intended to limit the present invention. Any person skilled in the art may make any modifications and variations in the form and details of the embodiments without departing from the spirit and scope of the present invention. However, the scope of protection of the present invention shall remain subject to the scope defined by the appended claims.

Claims

1. A valve opening adjustment method, characterized in that: The method comprises: Initialize the valve to determine the corresponding relationship between the valve rotation angle and rotation direction and the valve opening: The valve is provided with a nine-axis gyroscope, and the nine-axis gyroscope is provided with a three-axis magnetic sensor for collecting magnetic flux; Initializing the valve to determine the corresponding relationship between the valve rotation angle and rotation direction and the valve opening, including: Rotating the valve in a first direction by a preset angle so that the angle of the valve reaches the first angle from the initial angle and the opening of the valve reaches the first opening from the initial opening; Calculating the corresponding relationship between the rotation angle and rotation direction of the valve and the valve opening according to the initial opening, the first opening, the initial angle and the first angle; Wherein the preset angle is not less than 360 degrees; Calculating the target angle and target direction that the valve needs to rotate when adjusting the valve from the initial opening to the target opening; operating the valve to rotate the valve in a target direction by the target angle to achieve the target opening; The operating the valve to rotate the valve in a target direction by a target angle to achieve the target opening includes: Obtaining an actual rotation angle of the valve; The obtaining of the actual rotation angle of the valve includes: Obtaining magnetic flux collected by a three-axis magnetic sensor preset on the valve; The obtaining of the magnetic flux collected by the three-axis magnetic sensor preset on the valve includes: rotating the valve; Identify the magnetic flux values corresponding to the two coordinate axes that have changed in the three-dimensional coordinate system corresponding to the magnetic flux; Correcting the magnetic fluxes corresponding to the two changed coordinate axes to obtain corrected magnetic fluxes; The step of correcting the changed magnetic fluxes of the two coordinate axes to obtain the corrected magnetic fluxes includes: Calculate the magnetic flux correction values corresponding to the two coordinate axes that have changed; Multiplying the magnetic flux collected by the three-axis magnetic sensor by a factory coefficient and subtracting a magnetic flux correction value to obtain the corrected magnetic flux; calculating an actual rotation angle of the valve according to the magnetic flux; Calculating the actual rotation angle of the valve according to the magnetic flux includes: calculating the actual rotation angle of the valve according to the corrected magnetic flux; When the actual rotation angle of the valve along the target direction reaches the target angle, the rotation of the valve is stopped.

2. The method according to claim 1, characterized in that The calculation formula for calculating the actual rotation angle of the valve according to the magnetic flux is as follows: in, Indicates the valve rotation angle.

3. A valve opening adjustment system, characterized in that: include: An initialization module is used to initialize the valve to determine the corresponding relationship between the valve rotation angle and rotation direction and the valve opening: The valve is provided with a nine-axis gyroscope, and the nine-axis gyroscope is provided with a three-axis magnetic sensor for collecting magnetic flux; The initialization module is further configured to rotate the valve in a first direction by a preset angle, so that the angle of the valve reaches the first angle from the initial angle, and the opening of the valve reaches the first opening from the initial opening; Calculating the corresponding relationship between the rotation angle and rotation direction of the valve and the valve opening according to the initial opening, the first opening, the initial angle and the first angle; Wherein the preset angle is not less than 360 degrees; a calculation module, configured to calculate a target angle and a target direction in which the valve needs to rotate when the valve is adjusted from an initial opening to a target opening; an operating module, configured to operate the valve so as to rotate the valve in a target direction by a target angle to achieve the target opening; The operating module is further configured to operate the valve to rotate the valve in a target direction by a target angle to achieve the target opening, including: Obtaining an actual rotation angle of the valve; The obtaining of the actual rotation angle of the valve includes: Obtaining magnetic flux collected by a three-axis magnetic sensor preset on the valve; The obtaining of the magnetic flux collected by the three-axis magnetic sensor preset on the valve includes: rotating the valve; Identify the magnetic flux values corresponding to the two coordinate axes that have changed in the three-dimensional coordinate system corresponding to the magnetic flux; Correcting the magnetic fluxes corresponding to the two changed coordinate axes to obtain corrected magnetic fluxes; The step of correcting the changed magnetic fluxes of the two coordinate axes to obtain the corrected magnetic fluxes includes: Calculate the magnetic flux correction values corresponding to the two coordinate axes that have changed; Multiplying the magnetic flux collected by the three-axis magnetic sensor by a factory coefficient and subtracting a magnetic flux correction value to obtain the corrected magnetic flux; calculating an actual rotation angle of the valve according to the magnetic flux; Calculating the actual rotation angle of the valve according to the magnetic flux includes: calculating the actual rotation angle of the valve according to the corrected magnetic flux; When the actual rotation angle of the valve along the target direction reaches the target angle, the rotation of the valve is stopped.

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