CN118392482A - Performance test method, device, equipment and storage medium of pneumatic rotary valve - Google Patents
Performance test method, device, equipment and storage medium of pneumatic rotary valve Download PDFInfo
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Abstract
The application relates to the technical field of pneumatic rotary valves, and provides a performance testing method, a device, equipment and a storage medium for a pneumatic rotary valve, which are applied to a pneumatic control system and comprise the following steps: inputting compressed air into the pneumatic rotary valve to enable an execution unit of the pneumatic rotary valve to rotationally displace; obtaining a compression value of an execution unit, obtaining a displacement distance generated by the execution unit when the execution unit rotates and displaces, generating a parameter fitting straight line according to the compression value and the displacement distance, and prolonging the parameter fitting straight line to obtain an initial compression value; determining a displacement angle of the execution unit according to the displacement distance; determining a tangential force arm value according to a preset force arm value, a preset initial angle and a displacement angle; determining a seating force value and a seating force value of the pneumatic rotary valve according to the pressure value, the initial pressure value, the tangential force arm value, the pressure area and the output efficiency; outputting an alarm prompt when the seating force value is detected to be larger than a preset first threshold value or when the seating force value is detected to be larger than a preset second threshold value.
Description
Technical Field
The present application relates to the field of pneumatic rotary valves, and in particular, to a performance testing method, apparatus, device, and storage medium for a pneumatic rotary valve.
Background
Currently, in industrial production, the flow rate and flow velocity of a medium such as gas, liquid, steam, etc. are controlled by a pneumatic rotary valve. The pneumatic rotary valve is an industrial automatic control device, and mainly uses compressed air as a power source to drive a mechanical structure inside a valve body to realize the opening and closing or regulating functions of the valve. Pneumatic rotary valves include rotary style valves, the performance parameters of which are typically only available from conventional measured empirical evaluations by engineers and valve design parameters, and the actual mechanical and electrical performance parameters of the valve during operation cannot be monitored, which is detrimental to equipment maintenance and troubleshooting when problems occur.
Disclosure of Invention
The application provides a performance testing method, device and equipment for a pneumatic rotary valve and a storage medium, which are used for acquiring performance parameters of the pneumatic rotary valve in the operation process of the pneumatic rotary valve.
In a first aspect, an embodiment of the present application provides a performance testing method for a pneumatic rotary valve, applied to a pneumatic control system, where the pneumatic control system includes: the drive unit, load cell and stroke measurement unit, pneumatic rotary valve includes: the device comprises a cylinder unit and an execution unit, wherein the driving unit is connected with the cylinder unit, the pressure measuring unit is arranged in the cylinder unit, the stroke measuring unit is connected with the execution unit, and the execution unit has a preset compression area and preset output efficiency, and the method comprises the following steps of:
Inputting compressed air with preset pressure to the cylinder unit through the driving unit so as to enable the executing unit to rotate and displace;
The pressure measurement unit is used for acquiring a pressure value of the execution unit when the execution unit rotates and displaces, the travel measurement unit is used for acquiring a displacement distance generated by the execution unit when the execution unit rotates and displaces, a parameter fitting straight line is generated according to the pressure value and the displacement distance, and the parameter fitting straight line is prolonged to obtain an initial pressure value;
Determining a displacement angle of the execution unit according to the displacement distance;
determining a tangential force arm value according to a preset force arm value, a preset initial angle and the displacement angle;
Determining a seating force value and a seating force value of the pneumatic rotary valve according to the pressure value, the initial pressure value, the tangential force arm value, the pressure area and the output efficiency;
Outputting an alarm prompt when the seating force value is detected to be larger than a preset first threshold value or when the seating force value is detected to be larger than a preset second threshold value.
In a second aspect, an embodiment of the present application provides a performance testing apparatus for a pneumatic rotary valve, which is applied to a pneumatic control system, the pneumatic control system including: the drive unit, load cell and stroke measurement unit, pneumatic rotary valve includes: the utility model provides a pneumatic rotary valve, including cylinder unit, actuating unit with the cylinder unit is connected, pressure measurement unit set up in the cylinder unit, travel measurement unit with actuating unit connects, actuating unit has the compression area of predetermineeing and the output efficiency of predetermineeing, pneumatic rotary valve's capability test device includes:
The pneumatic driving module is used for inputting compressed air with preset pressure to the air cylinder unit through the driving unit so as to enable the executing unit to rotate and displace;
the parameter fitting module is used for obtaining a pressed value of the execution unit when the execution unit rotates and displaces through the pressure measuring unit, obtaining a displacement distance of the execution unit when the execution unit rotates and displaces through the travel measuring unit, generating a parameter fitting straight line according to the pressed value and the displacement distance, and prolonging the parameter fitting straight line to obtain an initial pressed value;
the angle calculation module is used for determining the displacement angle of the execution unit according to the displacement distance;
the moment arm calculation module is used for determining a tangent moment arm value according to a preset moment arm value, a preset initial angle and the displacement angle;
The force value calculation module is used for determining a seating force value and a seating force value of the pneumatic rotary valve according to the pressed value, the initial pressed value, the tangential force arm value, the pressed area and the output efficiency;
the alarm prompting module is used for outputting an alarm prompt when the seating force value is detected to be larger than a preset first threshold value or when the seating force value is detected to be larger than a preset second threshold value.
In a third aspect, an embodiment of the present application provides a terminal device, where the terminal device includes a memory and a processor;
The memory is used for storing a computer program;
The processor is configured to execute the computer program and implement the performance testing method of the pneumatic rotary valve according to any one of the embodiments of the present application when the computer program is executed.
In a third aspect, embodiments of the present application provide a computer readable storage medium storing a computer program, which when executed by a processor causes the processor to implement a method for testing performance of a pneumatic rotary valve according to any one of the embodiments of the present application.
The embodiment of the application provides a performance test method of a pneumatic rotary valve, which is applied to a pneumatic control system, wherein the pneumatic control system comprises the following components: the drive unit, pressure measurement unit and stroke measurement unit, pneumatic rotary valve includes: the device comprises a cylinder unit, an execution unit, a driving unit, a pressure measuring unit, a stroke measuring unit and a control unit, wherein the driving unit is connected with the cylinder unit, the pressure measuring unit is arranged on the cylinder unit, the stroke measuring unit is connected with the execution unit, the execution unit has a preset compression area and preset output efficiency, and the method comprises the following steps: compressed air with preset pressure is input into the cylinder unit through the driving unit so that the executing unit is subjected to rotary displacement; the method comprises the steps that a pressure measurement unit is used for obtaining a pressure value of an execution unit when rotary displacement occurs, a travel measurement unit is used for obtaining a displacement distance of the execution unit when rotary displacement occurs, a parameter fitting straight line is generated according to the pressure value and the displacement distance, and the parameter fitting straight line is prolonged to obtain an initial pressure value; determining a displacement angle of the execution unit according to the displacement distance; determining a tangential force arm value according to a preset force arm value, a preset initial angle and a displacement angle; determining a seating force value and a seating force value of the pneumatic rotary valve according to the pressure value, the initial pressure value, the tangential force arm value, the pressure area and the output efficiency; outputting an alarm prompt when the seating force value is detected to be larger than a preset first threshold value or when the seating force value is detected to be larger than a preset second threshold value. By the method, the pressure value and the displacement distance of the pneumatic rotary valve are accurately measured, the displacement angle is estimated according to the displacement distance, a parameter fitting straight line is generated by utilizing the pressure value and the displacement distance data, and an initial pressure value is obtained by extending the straight line.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method for testing performance of a pneumatic rotary valve according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a travel measuring unit according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an execution unit according to an embodiment of the present application;
fig. 4 is a schematic block diagram of a performance testing apparatus for a pneumatic rotary valve according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.
It is also to be understood that the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
The embodiment of the application provides a pneumatic rotary valve, which comprises a cylinder unit and an execution unit, wherein the execution unit is arranged in the cylinder unit. When compressed air is input into the cylinder unit, the execution unit generates rotary displacement to enable the pneumatic rotary valve to be in an open state (or a closed state), and the magnitude of the rotary displacement of the execution unit can control the flow rate of fluid in the pneumatic rotary valve.
An embodiment of the present application provides a pneumatic control system including: the device comprises a driving unit, a pressure measuring unit and a stroke measuring unit, wherein the driving unit is connected with a cylinder unit, the pressure measuring unit is arranged on the cylinder unit, and the stroke measuring unit is connected with an executing unit.
Referring to fig. 1, fig. 1 is a schematic flow chart of a performance testing method of a pneumatic rotary valve according to an embodiment of the application. The performance testing method of the pneumatic rotary valve shown in fig. 1 is applied to a pneumatic control system, and the performance testing method of the pneumatic rotary valve comprises the following specific steps: S101-S106.
S101, compressed air with preset pressure is input into the cylinder unit through the driving unit, so that the executing unit is subjected to rotary displacement.
Illustratively, the drive unit is responsible for providing and controlling the pressure of the compressed air entering the cylinder unit. The drive unit may be a combination of air sources (e.g., air compressors), pressure regulators, solenoid valves, or other control components that are capable of precisely setting and maintaining a desired preset pressure for the cylinder unit.
The cylinder unit is a power conversion core component of the pneumatic rotary valve, and receives compressed air provided by the driving unit so as to enable the execution unit to generate rotary displacement under the action of the compressed air. The cylinder unit design typically includes an air intake, an air exhaust, and a transmission (e.g., crank, gear, etc.) mechanically coupled to the actuator unit to ensure that the compressed air is able to effectively drive the actuator unit in rotation.
S102, obtaining a pressed value of the execution unit when the rotation displacement occurs through the pressure measuring unit, obtaining a displacement distance generated by the execution unit when the rotation displacement occurs through the stroke measuring unit, generating a parameter fitting straight line according to the pressed value and the displacement distance, and prolonging the parameter fitting straight line to obtain an initial pressed value.
Illustratively, the load cell is mounted within the cylinder cell, and the pressure value of the actuator unit upon displacement is determined by measuring the air pressure value within the cylinder cell. For example, when the cylinder unit has only one gas delivery port, the pressure measuring unit is mounted on the gas delivery port, and the air pressure value measured at the gas delivery port is used as the pressure value of the execution unit. For another example, the cylinder unit includes an air inlet and an air outlet, and the pressure measuring unit should measure the air pressure values of the air inlet and the air outlet, respectively, and take the absolute value of the difference between the air pressure values of the two positions as the pressure value of the executing unit.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a travel measuring unit according to an embodiment of the application. As shown in fig. 2, the stroke measuring unit 100 includes: the actuator unit 200 comprises a rotary lever member 21 and a fixing member 22, wherein the sensor member 11 is connected to the rotary lever member 21 via the wire member 12, and the fixing member 22 is used for fixing the rotary lever member 21. When the rotating rod member 21 rotates, the wire member 12 is pulled, and the sensor member 11 measures the stroke of the wire member 12, and the stroke is the length of the arc of rotation of the rotating rod member 21, thereby obtaining the displacement distance generated when the executing unit 200 generates rotational displacement.
And the compression values obtained in the two measurement processes are in one-to-one correspondence with the corresponding displacement distance data to form a plurality of groups of data pairs (compression values and displacement distances). And carrying out linear regression analysis on the plurality of groups of data pairs by a mathematical method to generate a parameter fitting straight line. This straight line represents the ideal relationship between the pressure value and displacement distance of the pneumatic rotary valve in the test range, and the slope represents the sensitivity of the air pressure to displacement, namely the displacement increment caused by the change of air pressure per unit.
Before the data pair is acquired, a preset data acquisition point is calibrated, a compression value and an air pressure value are generated after the rotary displacement of the collecting and executing unit reaches the data acquisition point, and the maximum displacement distance of the data acquisition point executing unit is in a preset proportion, for example, the preset proportion is 5% -10%. And generating a parameter fitting straight line by using the compression value and the displacement distance obtained after the data acquisition point, and obtaining an initial compression value by extending the straight line to a displacement zero point (the displacement distance corresponding to the displacement zero point is 0). This process may be aimed at eliminating noise from the measurement data to estimate the reference pressure when the valve is not beginning to rotate, enhancing the accuracy of the test results.
S103, determining the displacement angle of the execution unit according to the displacement distance.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating an execution unit according to an embodiment of the application. As shown in fig. 3, the string member 12 is wound around the fixing member 22 and is connected to the rotating lever member 21. The radius of the fixing member 22 is R, the diameter of the string member 12 is d, and if the stroke of the string member 12 measured by the sensor member 11 is I, the displacement distance of the rotating rod member 21 is I, and the specific calculation formula of the displacement angle is:
；
Wherein, Is the displacement angle of the rotating lever member 21.
S104, determining a tangential force arm value according to a preset force arm value, a preset initial angle and a preset displacement angle.
Illustratively, the force arm value corresponding to the pneumatic rotary valve is fixed, and the magnitude of the force arm value depends on the hardware structure of the pneumatic rotary valve, and the force arm value can be provided by the manufacturer of the pneumatic rotary valve. The preset initial angle is the angle between the swing arm of the pneumatic rotary valve and the horizontal position, for example, the preset initial angle is 45 degrees. The specific calculation formula of the tangential force arm value is as follows:
；
Wherein, Is the force arm value of the tangent line,For the preset moment arm value, the force arm value is set,Is the initial angle.
S105, determining the seating force value and the seating force value of the pneumatic rotary valve according to the pressure value, the initial pressure value, the tangential force arm value, the pressure area and the output efficiency.
Illustratively, a seating force value generally refers to the amount of resistance or force that a component needs to overcome when moving to its operational position (i.e., "seated"). The out-of-seat force value accordingly refers to the amount of driving force required to move a component that is already in a seated position away from its operational position (i.e., "out-of-seat"). These two force values can be used to evaluate valve anomalies, such as wear and blockage. However, due to the structural limitations of pneumatic valves, these two force values are often difficult to measure in real time.
The actuator unit may comprise a single diaphragm form and a cylinder form, and may have a predetermined compression area, for example, the actuator unit may be in the form of a single diaphragm, and the compression member of the actuator unit may be in the form of a single diaphragm, and the compression area of the actuator unit may be a single-sided diaphragm area of the single diaphragm. The execution unit also has a preset output efficiency, for example, the execution unit is in a single diaphragm form, and the output efficiency of the execution unit is 1.0.
In some embodiments, the formulas for calculating the seating force value and the unseating force value of the single diaphragm type execution unit are respectively:
；
；
Wherein, A seating force value for an actuator unit in the form of a single diaphragm,The out-of-seat force value for an actuator unit in the form of a single diaphragm,To perform the value of the pressure measured when the unit is seated,For the pressure value measured when the execution unit comes out of the seat, S is the pressure area of the execution unit,Is the output efficiency of the pneumatic rotary valve.
In some embodiments, formulas for calculating the seating force value and the unseating force value of the execution unit in the form of a cylinder are respectively:
；
；
Wherein, The seating force value of the actuator unit in the form of a cylinder,And a seating force value of an execution unit in the form of a cylinder.
The real-time monitoring finds possible abnormal conditions of the valve in the running process, such as excessive abrasion, resistance increase caused by blockage and the like, is beneficial to preventing potential faults, reducing production interruption risks and guaranteeing equipment safety.
S106, outputting an alarm prompt when the seating force value is detected to be larger than a preset first threshold value or when the seating force value is detected to be larger than a preset second threshold value.
By the method, the pressure value and the displacement distance of the pneumatic rotary valve are accurately measured, the displacement angle is estimated according to the displacement distance, a parameter fitting straight line is generated by utilizing the pressure value and the displacement distance data, and an initial pressure value is obtained by extending the straight line.
In order to more clearly describe the technical scheme of the present application, the technical scheme of the present application will be described through a specific embodiment, and it should be noted that the specific embodiment is used for expanding the technical scheme of the present application, and is not limited to the present application.
In some embodiments, the pneumatic control system is further specifically configured to, after being configured to determine the tangential moment arm value according to the preset moment arm value, the preset initial angle, and the displacement angle, implement: determining a dynamic torque value of the pneumatic rotary valve according to the pressure value, the tangential force arm value, the pressure area and the output efficiency; and outputting an alarm prompt when the dynamic torque value is detected to be larger than a preset third threshold value.
Illustratively, dynamic Torque (Dynamic Torque) needs to take into account instantaneous or changing trends of Torque under Dynamic conditions such as acceleration, deceleration, fluctuating loads, vibrations, etc.
By setting the third threshold value and carrying out warning prompt when the dynamic torque value is detected to be larger than the preset third threshold value, the abnormal condition of the pneumatic rotary valve can be early warned, the control precision and the dynamic response speed of the pneumatic rotary valve can be improved, and the energy consumption is reduced.
In some embodiments, the pneumatic control system is specifically configured to, when configured to generate a parameter fitting line according to the compression value and the displacement distance, and extend the parameter fitting line to obtain an initial compression value, implement the following steps: S201-S204.
And S201, when the execution unit reaches a preset data acquisition starting point, acquiring a displacement distance and a compression value according to preset acquisition time, wherein the interval between each acquisition time is equal.
Illustratively, the preset data acquisition starting point is calibrated according to a preset proportion and the maximum displacement distance of the execution unit, and the preset proportion is 5% -10% for example. And generating a parameter fitting straight line by using the compressed value and the displacement distance which are obtained after the execution unit is displaced to the data acquisition starting point. In the data acquisition, the data acquisition is performed at the same time interval, for example, at 0.05s. This process may be aimed at eliminating noise from the measurement data to estimate the reference pressure when the valve is not beginning to rotate, enhancing the accuracy of the test results.
S202, stopping obtaining the displacement distance and the compression value when the execution unit reaches a preset data acquisition end point.
Illustratively, the preset data acquisition endpoint is calibrated according to a preset proportion, for example, 90% -95%, and the maximum displacement distance of the execution unit. And stopping data acquisition when the execution unit is shifted to the data acquisition end point.
And S203, establishing a parameter coordinate system according to the compression value and the displacement distance, and forming parameter coordinates on the parameter coordinate system according to the displacement distance and the compression value corresponding to each acquisition time.
S204, generating a parameter fitting straight line according to a preset linear regression analysis algorithm and a parameter coordinate system, and fitting the parameter fitting straight line to an initial motion point to obtain an initial compression value corresponding to the initial motion point, wherein the motion distance corresponding to the initial motion point is 0.
Exemplary, the preset linear regression analysis algorithm includes: a least squares algorithm (Ordinary Least Squares, OLS) and a Ridge Regression algorithm (Ridge Regression). Wherein the least squares algorithm determines the best parameter fit line by solving for the coefficient that minimizes the sum of squares of the residuals (i.e., the sum of the squares of the distances between the observations and the fit line). The ridge regression algorithm solves the problem of coefficient instability that occurs in the least squares algorithm by introducing a regularization term (L2-norm penalty term), which also limits the euclidean norm (length) of the coefficient vector while minimizing the sum of squares of the residuals.
Therefore, through a parameter coordinate system and a parameter coordinate, the corresponding relation between the displacement distance and the pressed value is clearly displayed, a mathematical model of the displacement distance and the pressed value is established by using linear regression analysis, the initial pressed value of the initial movement point is determined, and key information is provided for analyzing the starting characteristic, optimizing control and fault diagnosis of the pneumatic rotary valve.
In some embodiments, the execution unit is in the form of a single diaphragm, the cylinder unit comprises a gas delivery port, the pressure measuring unit is arranged at the gas delivery port, and the pneumatic control system is specifically used for realizing that when the pressure measuring unit is used for acquiring the pressure value of the execution unit when the rotation displacement occurs, the pneumatic control system is used for realizing that: and acquiring the air pressure value of the air delivery port through the pressure measuring unit, and setting the air pressure value of the air delivery port as a pressed value.
The single diaphragm form of the actuator is generally compact and lightweight, and is suitable for applications where space is limited or frequent rapid movements are required. By directly measuring the air pressure value of the air delivery port and taking the air pressure value as the pressure value, the measuring process is simplified, and the complexity of the system is reduced.
In some embodiments, the execution unit is in the form of a cylinder, the cylinder unit includes an air inlet and an air outlet, the air inlet and the air outlet are respectively provided with a pressure measuring unit, and the pneumatic control system is specifically configured to realize that when the pressure measuring unit is used to obtain the pressure value of the execution unit when the rotational displacement occurs: the method comprises the steps of obtaining an air inlet pressure value of an air inlet through a pressure measuring unit, and obtaining an air outlet pressure value of an air outlet through the pressure measuring unit; subtracting the air pressure value from the air pressure value to obtain a pressure value.
The actuating unit in the form of a cylinder can provide a stable thrust and a greater range of travel due to its internal piston structure. By measuring the air pressure values of the air inlet and the air outlet respectively and calculating the difference value as the pressure value, the actual stress state in the air cylinder can be reflected more accurately, and fine control can be realized.
In some embodiments, the pneumatic control system is specifically configured to, when configured to determine the tangential moment arm value according to the preset moment arm value, the preset initial angle and the displacement angle, implement: taking the absolute value of the difference value between the initial angle and the displacement angle as a deflection angle; and multiplying the cosine value of the deflection angle with the moment arm value to obtain a tangential moment arm value.
The specific calculation formula of the dynamic torque of the execution unit in the form of a single diaphragm is shown as follows:
；
Wherein, Dynamic torque of the actuator unit in the form of a single diaphragm,Is the real-time compression value of the execution unit.
In some embodiments, the pneumatic control system is specifically configured to, when configured to determine the tangential moment arm value according to the preset moment arm value, the preset initial angle and the displacement angle, implement: taking the absolute value of the difference value between the initial angle and the displacement angle as a deflection angle; and multiplying the square of the cosine value of the deflection angle by the moment arm value to obtain the tangential moment arm value.
The specific calculation formula of the dynamic torque of the execution unit in the form of a cylinder is exemplified as follows:
；
Wherein, The dynamic torque of the execution unit in the form of a cylinder,Is the real-time compression value of the execution unit.
Referring to fig. 4, fig. 4 is a schematic block diagram of a performance testing apparatus for a pneumatic rotary valve, where the performance testing apparatus 300 for a pneumatic rotary valve is used to perform the performance testing method of the pneumatic rotary valve according to the embodiment of the present application. The performance testing apparatus 300 of the pneumatic rotary valve is applied to a pneumatic control system, the pneumatic control system comprising: the drive unit, pressure measurement unit and stroke measurement unit, pneumatic rotary valve includes: the device comprises a cylinder unit, an execution unit, a driving unit, a pressure measuring unit, a stroke measuring unit and an output efficiency, wherein the driving unit is connected with the cylinder unit, the pressure measuring unit is arranged on the cylinder unit, the stroke measuring unit is connected with the execution unit, and the execution unit has a preset compression area and a preset output efficiency. The performance testing apparatus 300 of the pneumatic rotary valve may be configured in a server.
The server may be an independent server, may be a server cluster, or may be a cloud server that provides cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, a content delivery network (Content Delivery Network, CDN), and basic cloud computing services such as big data and an artificial intelligence platform.
As shown in fig. 4, the performance test apparatus 300 of the pneumatic rotary valve includes: the device comprises an air pressure driving module 301, a parameter fitting module 302, an angle calculating module 303, a moment arm calculating module 304, a force value calculating module 305 and an alarm prompting module 306.
The pneumatic driving module 301 is configured to input compressed air with a preset pressure to the cylinder unit through the driving unit, so as to make the execution unit perform rotational displacement.
The parameter fitting module 302 is configured to obtain, by using the pressure measurement unit, a pressure value of the execution unit when rotational displacement occurs, obtain, by using the stroke measurement unit, a displacement distance of the execution unit when rotational displacement occurs, generate a parameter fitting straight line according to the pressure value and the displacement distance, and extend the parameter fitting straight line to obtain an initial pressure value.
In some embodiments, the parameter fitting module 302 is specifically configured to, when configured to generate a parameter fitting line according to the compression value and the displacement distance, and extend the parameter fitting line to obtain an initial compression value, implement: when the execution unit reaches a preset data acquisition starting point, acquiring a displacement distance and a compression value according to preset acquisition time, wherein the interval between each acquisition time is equal; stopping obtaining the displacement distance and the compression value when the execution unit reaches a preset data acquisition end point; establishing a parameter coordinate system according to the compression value and the displacement distance, and forming parameter coordinates on the parameter coordinate system according to the displacement distance and the compression value corresponding to each acquisition moment; and generating a parameter fitting straight line according to a preset linear regression analysis algorithm and a parameter coordinate system, and fitting the parameter fitting straight line to an initial motion point to obtain an initial compression value corresponding to the initial motion point, wherein the motion distance corresponding to the initial motion point is 0.
In some embodiments, the execution unit is in the form of a single diaphragm, the cylinder unit includes a gas delivery port, the pressure measurement unit is disposed on the gas delivery port, and the parameter fitting module 302 is specifically configured to, when configured to obtain, by the pressure measurement unit, a pressure value of the execution unit when the rotational displacement occurs: and acquiring the air pressure value of the air delivery port through the pressure measuring unit, and setting the air pressure value of the air delivery port as a pressed value.
In some embodiments, the execution unit is in the form of a cylinder, and the cylinder unit includes an air inlet and an air outlet, where the air inlet and the air outlet are respectively provided with a pressure measuring unit, and the parameter fitting module 302 is specifically configured to, when configured to obtain, by the pressure measuring unit, a pressure value of the execution unit when the rotational displacement occurs: the method comprises the steps of obtaining an air inlet pressure value of an air inlet through a pressure measuring unit, and obtaining an air outlet pressure value of an air outlet through the pressure measuring unit; subtracting the air pressure value from the air pressure value to obtain a pressure value.
The angle calculation module 303 is configured to determine a displacement angle of the execution unit according to the displacement distance.
The moment arm calculation module 304 is configured to determine a tangential moment arm value according to a preset moment arm value, a preset initial angle and a preset displacement angle.
In some embodiments, the moment arm calculation module 304 is configured to, when configured to determine the tangential moment arm value according to the preset moment arm value, the preset initial angle, and the displacement angle, specifically: taking the absolute value of the difference value between the initial angle and the displacement angle as a deflection angle; and multiplying the cosine value of the deflection angle with the moment arm value to obtain a tangential moment arm value.
In some embodiments, the moment arm calculation module 304 is configured to, when configured to determine the tangential moment arm value according to the preset moment arm value, the preset initial angle, and the displacement angle, specifically: taking the absolute value of the difference value between the initial angle and the displacement angle as a deflection angle; and multiplying the square of the cosine value of the deflection angle by the moment arm value to obtain the tangential moment arm value.
The force value calculation module 305 is configured to determine a seating force value and an unseating force value of the pneumatic rotary valve according to the pressure value, the initial pressure value, the tangential force arm value, the pressure area and the output efficiency.
In some embodiments, the force value calculation module 305 is further specifically configured to, after being configured to determine the tangential force arm value according to the preset force arm value, the preset initial angle, and the displacement angle, implement: determining a dynamic torque value of the pneumatic rotary valve according to the pressure value, the tangential force arm value, the pressure area and the output efficiency; and outputting an alarm prompt when the dynamic torque value is detected to be larger than a preset third threshold value.
The alarm prompting module 306 is configured to output an alarm prompt when the seating force value is detected to be greater than a preset first threshold value, or when the seating force value is detected to be greater than a preset second threshold value.
The embodiment of the application provides terminal equipment, which comprises a memory and a processor; the memory is used for storing a computer program; the processor is configured to execute the computer program and implement the performance testing method of the pneumatic rotary valve according to any one of the embodiments of the present application when the computer program is executed.
An embodiment of the present application provides a computer readable storage medium storing a computer program, where the computer program when executed by a processor causes the processor to implement a performance test method for a pneumatic rotary valve according to any one of the embodiments of the present application.
While the application has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (10)
1. A method of testing the performance of a pneumatic rotary valve, applied to a pneumatic control system, the pneumatic control system comprising: the drive unit, load cell and stroke measurement unit, pneumatic rotary valve includes: the device comprises a cylinder unit and an execution unit, wherein the driving unit is connected with the cylinder unit, the pressure measuring unit is arranged in the cylinder unit, the stroke measuring unit is connected with the execution unit, and the execution unit has a preset compression area and preset output efficiency, and the method comprises the following steps of:
Inputting compressed air with preset pressure to the cylinder unit through the driving unit so as to enable the executing unit to rotate and displace;
The pressure measurement unit is used for acquiring a pressure value of the execution unit when the execution unit rotates and displaces, the travel measurement unit is used for acquiring a displacement distance generated by the execution unit when the execution unit rotates and displaces, a parameter fitting straight line is generated according to the pressure value and the displacement distance, and the parameter fitting straight line is prolonged to obtain an initial pressure value;
Determining a displacement angle of the execution unit according to the displacement distance;
determining a tangential force arm value according to a preset force arm value, a preset initial angle and the displacement angle;
Determining a seating force value and a seating force value of the pneumatic rotary valve according to the pressure value, the initial pressure value, the tangential force arm value, the pressure area and the output efficiency;
Outputting an alarm prompt when the seating force value is detected to be larger than a preset first threshold value or when the seating force value is detected to be larger than a preset second threshold value.
2. The method of performance testing of a pneumatic rotary valve of claim 1, wherein after said determining a tangential moment arm value based on a preset moment arm value, a preset initial angle, and said displacement angle, the method further comprises:
Determining a dynamic torque value of the pneumatic rotary valve according to the pressure value, the tangential force arm value, the pressure area and the output efficiency;
and outputting an alarm prompt when the dynamic torque value is detected to be larger than a preset third threshold value.
3. The method of testing the performance of a pneumatic rotary valve as set forth in claim 1, wherein said generating a parameter-fitted line from the compression value and the displacement distance and extending the parameter-fitted line to obtain an initial compression value includes:
When the execution unit reaches a preset data acquisition starting point, acquiring the displacement distance and the compression value according to preset acquisition time, wherein the interval between the acquisition time is equal;
Stopping acquiring the displacement distance and the compression value when the execution unit reaches a preset data acquisition end point;
establishing a parameter coordinate system according to the pressed value and the displacement distance, and forming parameter coordinates on the parameter coordinate system according to the displacement distance and the pressed value corresponding to each acquisition time;
generating a parameter fitting straight line according to a preset linear regression analysis algorithm and the parameter coordinate system, fitting the parameter fitting straight line to an initial motion point to obtain an initial compression value corresponding to the initial motion point, wherein the motion distance corresponding to the initial motion point is 0.
4. The method for testing the performance of a pneumatic rotary valve according to claim 1, wherein the executing unit is in the form of a single diaphragm, the cylinder unit comprises a gas delivery port, the pressure measuring unit is arranged at the gas delivery port, the pressure value of the executing unit when the executing unit is subjected to rotary displacement is obtained through the pressure measuring unit, and the method comprises the following steps:
And acquiring the air pressure value of the air delivery port through the pressure measuring unit, and setting the air pressure value of the air delivery port as the pressed value.
5. The method for testing the performance of a pneumatic rotary valve according to claim 1, wherein the executing unit is in the form of a cylinder, the cylinder unit includes an air inlet and an air outlet, the air inlet and the air outlet are respectively provided with one pressure measuring unit, the obtaining, by the pressure measuring unit, a pressure value of the executing unit when a rotational displacement occurs includes:
acquiring an air inlet pressure value of the air inlet through the pressure measuring unit, and acquiring an air outlet pressure value of the air outlet through the pressure measuring unit;
And subtracting the air outlet pressure value from the air inlet pressure value to obtain the pressed value.
6. The method of performance testing of a pneumatic rotary valve as set forth in claim 4, wherein said determining a tangential moment arm value based on a preset moment arm value, a preset initial angle, and said displacement angle comprises:
taking the absolute value of the difference value between the initial angle and the displacement angle as a deflection angle;
And multiplying the cosine value of the deflection angle with the moment arm value to obtain the tangent moment arm value.
7. The method of performance testing of a pneumatic rotary valve of claim 5, wherein determining a tangential moment arm value based on a preset moment arm value, a preset initial angle, and the displacement angle comprises:
taking the absolute value of the difference value between the initial angle and the displacement angle as a deflection angle;
And multiplying the square of the cosine value of the deflection angle by the moment arm value to obtain the tangent moment arm value.
8. A performance testing apparatus for a pneumatic rotary valve, for use in a pneumatic control system, the pneumatic control system comprising: the drive unit, load cell and stroke measurement unit, pneumatic rotary valve includes: the utility model provides a pneumatic rotary valve, including cylinder unit, actuating unit with the cylinder unit is connected, pressure measurement unit set up in the cylinder unit, travel measurement unit with actuating unit connects, actuating unit has the compression area of predetermineeing and the output efficiency of predetermineeing, pneumatic rotary valve's capability test device includes:
The pneumatic driving module is used for inputting compressed air with preset pressure to the air cylinder unit through the driving unit so as to enable the executing unit to rotate and displace;
the parameter fitting module is used for obtaining a pressed value of the execution unit when the execution unit rotates and displaces through the pressure measuring unit, obtaining a displacement distance of the execution unit when the execution unit rotates and displaces through the travel measuring unit, generating a parameter fitting straight line according to the pressed value and the displacement distance, and prolonging the parameter fitting straight line to obtain an initial pressed value;
the angle calculation module is used for determining the displacement angle of the execution unit according to the displacement distance;
the moment arm calculation module is used for determining a tangent moment arm value according to a preset moment arm value, a preset initial angle and the displacement angle;
The force value calculation module is used for determining a seating force value and a seating force value of the pneumatic rotary valve according to the pressed value, the initial pressed value, the tangential force arm value, the pressed area and the output efficiency;
the alarm prompting module is used for outputting an alarm prompt when the seating force value is detected to be larger than a preset first threshold value or when the seating force value is detected to be larger than a preset second threshold value.
9. A terminal device, characterized in that the terminal device comprises a memory and a processor;
The memory is used for storing a computer program;
The processor is configured to execute the computer program and implement the performance testing method of the pneumatic rotary valve according to any one of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, causes the processor to implement the performance testing method of a pneumatic rotary valve according to any one of claims 1 to 7.
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