Off-line multi-turn electric actuator travel switch setting device

Abstract

The present disclosure belongs to the field of nuclear power technology, and specifically relates to an offline multi-turn electric actuator travel switch setting device. The present disclosure adopts a structure of a host computer combined with a controller, and realizes dynamic parameter monitoring of electric actuator maintenance through an inspection bench. It adopts a box-type front and rear support structure, and is equipped with a high-precision torque sensor and a stable and controllable pneumatic brake system. The host computer has a friendly human-machine interface and is easy to operate. The controller controls the start and stop and rotation direction of the electric actuator equipment, dynamically adjusts the output torque of the brake to provide a load to the electric actuator, connects the torque sensor to obtain the real-time output torque and rotation angle of the electric actuator, collects the operating information of the electric actuator, and the controller is connected to the host computer to obtain the command triggered by the host computer and upload the data to the host computer. In this way, the dynamic load, torque and other data in the calibration process of the valve in the online state can be accurately simulated. The functional calibration of the electric actuator is achieved efficiently and accurately.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power, and in particular relates to an off-line multi-rotation electric actuator travel switch setting device. Background Art

[0002] Electric actuators are widely used in power plants, petroleum, and industrial and mining enterprises. According to the maintenance instructions of each equipment manufacturer, electric actuators require regular disassembly and overhaul. In related art, the limit switch setting of electric actuators after disassembly and overhaul is set online after reinstallation. This setting method has the following disadvantages:

[0003] 1. The pipelines in some plants are closely arranged and the space is small, which limits the operating space for personnel during online adjustments;

[0004] 2. Some factories have high temperature, strong noise, high dose and other environmental conditions. During the online adjustment period, the personnel will be affected by the occupational environment for a certain period of time;

[0005] 3. The adjustment of the electric actuator needs to be coordinated with the valve opening and closing operation. The status of some valves is affected by the process system and is not allowed to be operated, which brings uncertainty to the time window for equipment maintenance.

[0006] In view of the above situation, it is urgent to improve the setting method of the travel switch after the electric actuator is disassembled and repaired. Summary of the Invention

[0007] To overcome the problems existing in the related art, an offline multi-rotation electric actuator travel switch setting device is provided. The device includes: a host computer, a controller, and a test bench. The test bench includes a frame and a workbench. A pneumatic brake is installed at the bottom of the frame of the frame. A torque sensor is installed on the top of the pneumatic brake. The measuring end of the torque sensor is connected to the electric actuator. The torque sensor can collect the torque of the electric actuator. In addition, a current sensor and a rotation sensor are integrated on the workbench to collect the current, number of rotations, speed, and rotation direction of the electric actuator.

[0008] The host computer can send control instructions to the electric actuator through the controller to control the start and stop, number of rotations, speed and rotation direction of the electric actuator; the host computer can also send braking instructions to the pneumatic brake through the controller to control the pneumatic brake to implement a preset resistance on the torque sensor to simulate the force state of the electric actuator in the online state; the controller can also collect the working status of the electric actuator and obtain data collected by the torque sensor, current sensor and rotation sensor.

[0009] In a possible implementation, a mounting flange is provided on the upper portion of the workbench, an electric actuator is fixedly connected to the upper portion of the mounting flange, and the sizes of the mounting flange, the input support, and the input interface are adjustable.

[0010] In one possible implementation, during the test process, the upper computer can determine the test protection parameters based on the input model of the electric actuator to be tested, and obtain the test type and parameters to be calibrated input in the interactive interface. Before the test, the upper computer selects the test parameters of the corresponding model from the database based on the model of the electric actuator to be tested input by the user; then, after the upper computer obtains the test type and parameters to be calibrated input by the user, it generates a test instruction and sends it to the controller. The controller controls the electric actuator to execute the action corresponding to the test instruction. During the test, the upper computer collects actual operating parameters from the torque sensor, current sensor, rotation sensor and electric actuator, and generates test results based on the comparison results of the actual operating data with the parameters to be calibrated.

[0011] In a possible implementation, the test types include: revolution number calibration, bypass time calibration, and limit advance time calibration.

[0012] In one possible implementation, when the test type is calibration of the number of revolutions, the parameter to be calibrated is the preset number of revolutions. The host computer generates a test instruction to trigger the electric actuator to rotate in a preset direction through the controller; the host computer monitors the electric rotation process and collects the actual number of revolutions of the electric actuator. When the actuator rotates to the physical limit position, the first travel switch signal is triggered. The host computer determines the first end point of the electric actuator stroke based on the collected first travel switch signal, and compares whether the preset number of revolutions is consistent with the actual collected number of revolutions, thereby judging whether the preset number of revolutions is qualified. Based on the qualified number of revolutions N, the host computer rotates N times in the opposite direction with the first end point as the reference point until the second travel switch signal is triggered, and the second end point of the electric actuator stroke is determined according to the signal sent by the second travel switch. The host computer finally determines the effective stroke range of the electric actuator through the first end point and the second end point, and establishes a mapping relationship between the number of revolutions and the actual position.

[0013] In one possible implementation, when the test type is bypass time calibration, the parameters to be calibrated are the preset bypass time and the preset bypass stroke rotation number. The upper computer generates a test instruction and triggers the electric actuator to start through the controller. Then, the upper computer controls the simulated valve of the pneumatic brake system to fully close through the controller. When the electric actuator triggers the closing torque switch signal, the moment when the closing torque switch signal is triggered is used as the starting moment, and the time from the starting moment to the moment when the electric actuator stops is used as the actual bypass time of the electric actuator. The number of rotations of the electric actuator within the actual bypass time is collected as the actual bypass stroke rotation number. The upper computer compares the actual bypass time and the actual bypass stroke rotation number with the preset bypass time and the preset bypass stroke rotation number to determine whether the preset bypass time and the preset bypass stroke rotation number are reasonable, and prompts the operator to adjust the reference setting value of the bypass switch through the interactive interface.

[0014] In one possible implementation, when the test type is limit advance time calibration, the parameters to be calibrated are the preset limit advance time and the preset number of advance stroke revolutions. The upper computer generates a test instruction and triggers the electric actuator to start through the controller. The upper computer dynamically determines whether the current position is the limit advance starting point based on the collected current position of the electric actuator and the set stroke range, and takes the time from the moment the electric actuator is at the limit advance starting point to the moment the electric actuator stops as the actual limit advance time of the electric actuator, and takes the number of revolutions of the electric actuator within the actual limit advance time as the actual number of advance stroke revolutions. The actual limit advance time and the actual number of advance stroke revolutions are compared with the preset limit advance time and the preset number of advance stroke revolutions to determine whether the preset limit advance time and the preset number of limit advance stroke revolutions are reasonable, and prompts the operator to adjust the reference setting value of the limit switch through the interactive interface.

[0015] In a possible implementation, the host computer can also generate a calibration curve for each test type and verify the calibration accuracy after the test is completed.

[0016] In a possible implementation, the power of the pneumatic brake is achieved by controlling the air pressure output to the pneumatic brake through an electric proportional valve.

[0017] In one possible implementation, the electric proportional valve control method includes: the controller converts the preset pressure corresponding to the current moment into a first voltage signal input into the control loop according to the preset torque change trend, and converts the pressure signal collected by the pressure sensor into a second voltage signal input into the control loop. The first voltage signal and the second voltage signal constitute a negative feedback control to control the air supply solenoid valve and the exhaust solenoid valve switches of the electric proportional valve. When the pressure value collected by the pressure sensor does not exceed the preset pressure, the air supply solenoid valve is energized and opened to allow the air source to enter the pneumatic component, increasing the friction of the pneumatic brake; when the pressure feedback pressure of the pressure sensor is greater than the preset pressure, the exhaust solenoid valve is energized and opened, and the gas in the pneumatic component is discharged, reducing the friction of the pneumatic brake; the pilot valve and the air supply solenoid valve are electrically connected, and the controller controls the operation of the air supply solenoid valve through the pilot valve.

[0018] The beneficial effects of the present disclosure are as follows: The present disclosure utilizes a host computer combined with a controller structure, enabling dynamic parameter monitoring of electric actuator maintenance via an inspection bench. The present disclosure employs a box-type front and rear support structure, equipped with a high-precision torque sensor and a stable and controllable pneumatic brake system. The host computer features a user-friendly human-machine interface for easy operation. The controller controls the start / stop and rotation direction of the electric actuator, dynamically adjusts the brake output torque to provide a load to the electric actuator, connects to a torque sensor to obtain the electric actuator's real-time output torque and rotation angle, and collects operating information about the electric actuator. The controller connects to the host computer, obtains commands triggered by the host computer, and uploads the data to the host computer. This allows for accurate simulation of dynamic load, torque, and other data during the calibration process of the valve in an online state. This enables efficient and accurate functional calibration of the electric actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of an offline multi-turn electric actuator travel switch setting device shown in an embodiment of the present disclosure.

[0020] Figure 2 It is a cross-sectional view of an offline multi-turn electric actuator travel switch setting device shown in an embodiment of the present disclosure.

[0021] Figure 3 Schematic diagram of the installation of an electric actuator shown in an embodiment of the present disclosure.

[0022] Figure 4 This is a schematic diagram of the installation of an electric proportional valve shown in an embodiment of the present disclosure.

[0023] In the picture:

[0024] 1. Electric actuator; 2. Coupling; 3. Test bench; 4. Frame; 5. Workbench;

[0025] 6. Input support; 7. Torque sensor; 8. Pneumatic brake; 9. Brake support;

[0026] 10. Box body; 11. Input interface; 12. Mounting flange. DETAILED DESCRIPTION

[0027] The present disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Unless otherwise defined, the technical and scientific terms used in this disclosure have the same meanings as those generally understood by those skilled in the art to which this disclosure belongs; the terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit this disclosure; the term "including" and any variations thereof in this disclosure are intended to cover non-exclusive inclusions. Obviously, the embodiments described in this disclosure are only some of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those of ordinary skill in the art without making any creative work are within the scope of protection of this disclosure.

[0029] References to "embodiments" in this disclosure mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] Figure 1 This is a perspective view of an offline multi-turn electric actuator travel switch setting device shown in an embodiment of the present disclosure. Figure 2 : is a cross-sectional view of an offline multi-turn electric actuator travel switch setting device shown in an embodiment of the present disclosure, such as Figure 1 and Figure 2 As shown, the device includes: a host computer, a controller and a test bench 3, the test bench 3 includes a frame 4 and a workbench 5, a pneumatic brake 8 is installed at the bottom of the frame of the frame 4, a torque sensor 7 is installed on the upper part of the pneumatic brake 8 through a brake support 9, and a box 10 is provided on the outside of the brake support 9 and the torque sensor 7.

[0031] The measuring end of the torque sensor 7 is equipped with an input interface 11; a workbench 5 is installed on the upper part of the frame 4, an input support 6 is installed in the middle of the workbench 5, and the input interface 11 is installed in the input support 6. Figure 3As shown, a mounting flange 12 is provided on the upper part of the workbench 5, and an electric actuator 1 is fixedly connected to the upper part of the mounting flange 12. The electric actuator 1 is connected to the input interface 11 through a coupling 2, and the torque sensor 7 can collect the torque of the electric actuator 1; in addition, a current sensor and a rotation circle sensor are also integrated on the workbench 5, which can collect the current, number of rotation circles, speed and rotation direction of the electric actuator.

[0032] The electric actuator 1, torque sensor 7, current sensor, rotation sensor, and pneumatic brake 8 are connected to the signal transmission and acquisition module of the test bench 3 via an adapter plug. The signal transmission and acquisition module, controller, and host computer are sequentially connected in communication. The host computer can send control instructions to the electric actuator 1 through the controller and signal transmission and acquisition module to control the start and stop, number of rotations, speed, and direction of rotation of the electric actuator 1. The host computer can also send braking instructions to the pneumatic brake 8 through the controller to control the pneumatic brake 8 to apply a preset resistance to the torque sensor 7 to simulate the force state of the electric actuator in an online state. The controller can also use the signal transmission and acquisition module to collect the operating status of the electric actuator 1 and obtain data collected by the torque sensor 7, current sensor, and rotation sensor.

[0033] It should be noted that the controller can be, for example, a PLC (Programmable Logic Controller) or an MCU (Microcontroller Unit); the host computer can be, for example, a notebook computer, a desktop computer or a server. The present disclosure does not limit the types of the host computer and the controller.

[0034] In a possible implementation, the sizes of the mounting flange 12 , the input support 6 , and the input interface 11 can be adjusted, thereby being adaptable to electric actuators of different models.

[0035] During the test, the host computer determines the test protection parameters based on the input model of the electric actuator under test and receives the test type and parameters to be calibrated entered through the interactive interface. Test parameters include the reduction ratio, maximum allowable number of revolutions, and torque limit. These parameters represent the limits on the operating parameters of the electric actuator. Different electric actuator models have different mechanical structures (such as gear reduction ratio and maximum stroke) and electrical characteristics (such as rated current and voltage). Before the test, the host computer selects the test parameters corresponding to the model of the electric actuator under test from a database based on the user's input. This ensures that the test process is adapted to the physical characteristics of the electric actuator and prevents calibration failures or equipment damage due to human error. Next, after receiving the user-entered test type and parameters to be calibrated, the host computer generates a test command and sends it to the controller. The controller controls the electric actuator to execute the action corresponding to the test command. During the test, the host computer collects actual operating parameters from the torque sensor, current sensor, revolution sensor, and electric actuator, and generates test results based on the comparison of the actual operating data with the parameters to be calibrated.

[0036] This disclosure utilizes a host computer combined with a controller, enabling dynamic parameter monitoring of electric actuator maintenance via a test bench. The system utilizes a box-type front and rear support structure, equipped with a high-precision torque sensor and a stable, controllable pneumatic brake system. The host computer features a user-friendly human-machine interface for easy operation. The controller controls the start / stop and rotation direction of the electric actuator, dynamically adjusts the brake's output torque to provide load to the actuator, connects to the torque sensor to obtain the actuator's real-time output torque and rotation angle, and collects operating information. The controller connects to the host computer, receives commands triggered by the host computer, and uploads the data to the host computer. This allows for precise simulation of dynamic loading, torque, and other data during the calibration process of an online valve. This enables efficient and accurate functional calibration of the electric actuator.

[0037] In a possible implementation, the test types include: revolution number calibration, bypass time calibration, and limit advance time calibration.

[0038] If the test type is rotation calibration, the parameter to be calibrated is the preset number of rotations. The host computer generates a test command and triggers the electric actuator to rotate in the preset direction (open or close) through the controller. The host computer automatically monitors the electric rotation process and collects the actual number of rotations of the electric actuator (which may also include the rotation direction, the time when the limit switch is triggered, and the timeout when the limit switch is not triggered). When the actuator rotates to the physical limit position (fully open or fully closed), the first limit switch signal is triggered. Based on the collected first limit switch signal, the host computer determines the first end point of the electric actuator's travel and compares the preset number of rotations with the actual number of rotations collected to determine whether the preset number of rotations is consistent. Based on the qualified number of revolutions N, the host computer then rotates the actuator N times in the opposite direction, starting with the first end point as a reference point, until the second travel switch signal is triggered. Based on the signal from the second travel switch, the host computer determines the second end point of the actuator's travel. The first and second travel switches are located at opposite ends of the actuator's travel, respectively. For example, if the first travel switch is an open travel switch, the first end point is the open end point; if the second travel switch is a close travel switch, the second end point is the close end point. The host computer ultimately determines the actuator's effective travel range based on the open and close end points and establishes a mapping between the number of revolutions and the actual position, thereby establishing a corresponding relationship between the number of revolutions and the actual position. In this way, the disclosed device can reduce manual intervention and improve efficiency and consistency. The dual protection provided by the travel switch and the number of revolutions prevents mechanical damage to the actuator caused by excessive rotation. This ensures that the actuator can accurately reach the target position (e.g., 50% valve opening corresponds to 50 revolutions) during subsequent operation and provides data for subsequent control.

[0039] In the case of bypass time calibration, the parameters to be calibrated are the preset bypass time and the preset bypass stroke revolutions. The host computer generates a test command, triggering the electric actuator to start via the controller. The host computer then controls the pneumatic brake system's simulated valve to fully close. When the closing torque switch signal from the electric actuator is detected, the triggering moment is used as the starting point, and the bypass switch setting is automatically prompted via the human-machine interface. The host computer then uses the time from the starting point to the moment the electric actuator stops as the actual bypass time. The number of electric actuator revolutions during the actual bypass time is collected as the actual bypass stroke revolutions. The actual bypass time and actual bypass stroke revolutions are compared with the preset bypass time and preset bypass stroke revolutions to determine whether the preset bypass time and preset bypass stroke revolutions are reasonable. The host computer then prompts the operator through the interactive interface to adjust the bypass switch reference setting (e.g., determining the adjustment value based on the difference between the preset bypass time and actual bypass time, and / or the difference between the preset bypass stroke revolutions and the actual bypass stroke revolutions). This ensures that the electric actuator has a reasonable bypass time or number of revolutions during the process of opening after closing, and verifies its reliability by simulating pneumatic braking to avoid the valve failing to open normally due to the bypass time being set too short, or bypassing a real overload fault due to the bypass time being set too long.

[0040] When the test type is limit advance time calibration, the parameters to be calibrated are the preset limit advance time and the preset number of advance travel revolutions. The upper computer generates a test command and triggers the electric actuator to start through the controller. The upper computer dynamically determines whether the current position is the limit advance starting point based on the collected current position of the electric actuator and the set travel range (for example, if 100 revolutions are required from fully open to fully closed, the limit advance signal is triggered at the 98th revolution). The duration from the moment the electric actuator is at the limit advance starting point to the moment the electric actuator stops is used as the actual limit advance time of the electric actuator, and the number of revolutions of the electric actuator within the actual limit advance time is used as the actual number of advance travel revolutions. The actual limit advance time and the actual number of advance travel revolutions are compared with the preset limit advance time and the preset number of advance travel revolutions to determine whether the preset limit advance time and the preset number of limit advance travel revolutions are reasonable. The upper computer then prompts the operator to adjust the reference setting value of the limit switch through the interactive interface. In this way, a reminder message can be sent in advance before the electric actuator approaches the end of its stroke, informing the operator that the valve is about to open or close.

[0041] In a possible implementation, the host computer can also generate a calibration curve for each test type and verify the calibration accuracy after the test is completed.

[0042] In a possible implementation, the power of the pneumatic brake is achieved by controlling the air pressure output to the pneumatic brake through an electric proportional valve.

[0043] See also Figure 4 The electric proportional valve control method includes: a controller converts a preset pressure corresponding to the current moment into a first voltage signal based on a preset torque change trend, and then converts the pressure signal collected by a pressure sensor into a second voltage signal, which is then input into the control circuit. The first and second voltage signals form a negative feedback control mechanism to control the opening and closing of the electric proportional valve's air supply solenoid valve and exhaust solenoid valve. When the pressure value collected by the pressure sensor does not exceed the preset pressure, the air supply solenoid valve is energized to open, allowing air to enter the pneumatic component and increasing the friction of the pneumatic brake. When the pressure feedback from the pressure sensor exceeds the preset pressure, the exhaust solenoid valve is energized to open, exhausting air from the pneumatic component and reducing the friction of the pneumatic brake. A pilot valve is electrically connected to the air supply solenoid valve, and the controller controls the operation of the air supply solenoid valve through the pilot valve, enabling the air supply solenoid valve to respond quickly, reducing operation delays, and improving the system's response speed and accuracy. The pneumatic brake adjusts friction using air pressure, which is compared in real time with the torque value fed back by the high-precision torque sensor, improving the control accuracy of the pneumatic brake.

[0044] While various embodiments of the present disclosure have been described above, the above descriptions are illustrative, non-exhaustive, and not intended to be limiting of the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An off-line multi-turn electric actuator travel switch setting device, characterized in that: The device comprises: a host computer, a controller and a test bench, the test bench comprising a frame and a workbench, a pneumatic brake being mounted on the bottom of the frame of the frame, a torque sensor being mounted on the top of the pneumatic brake, the measuring end of the torque sensor being connected to the electric actuator, the torque sensor being capable of collecting the torque of the electric actuator; in addition, a current sensor and a rotation sensor are integrated on the workbench, which are capable of collecting the current, number of rotations, speed and direction of rotation of the electric actuator; The host computer can send control instructions to the electric actuator through the controller to control the start and stop, number of rotations, speed and rotation direction of the electric actuator. The host computer can also send braking instructions to the pneumatic brake through the controller to control the pneumatic brake to apply a preset resistance to the torque sensor to simulate the force state of the electric actuator in the online state. The controller can also collect the working status of the electric actuator and obtain data collected by the torque sensor, current sensor and rotation sensor. During the test, the host computer can determine the test protection parameters according to the input model of the electric actuator to be tested, and obtain the test type and parameters to be calibrated input through the interactive interface. Before the test, the host computer selects the test protection parameters of the corresponding model from the database according to the model of the electric actuator to be tested input by the user. Then, after obtaining the test type and parameters to be calibrated input by the user, the host computer generates a test instruction and sends it to the controller. The controller controls the electric actuator to execute the action corresponding to the test instruction. During the test, the host computer collects actual operating parameters from the torque sensor, current sensor, rotation sensor and electric actuator, and generates test results based on the comparison results of the actual operating data with the parameters to be calibrated. Test types include: limit lead time calibration; When the test type is limit advance time calibration, the parameters to be calibrated are the preset limit advance time and the preset number of advance stroke revolutions. The upper computer generates a test instruction and triggers the electric actuator to start through the controller. The upper computer dynamically determines whether the current position is the limit advance starting point based on the collected current position of the electric actuator and the set stroke range, and takes the time from the moment the electric actuator is at the limit advance starting point to the moment the electric actuator stops as the actual limit advance time of the electric actuator, and takes the number of revolutions of the electric actuator within the actual limit advance time as the actual number of advance stroke revolutions. The actual limit advance time and the actual number of advance stroke revolutions are compared with the preset limit advance time and the preset number of advance stroke revolutions to determine whether the preset limit advance time and the preset number of limit advance stroke revolutions are reasonable, and prompts the operator to adjust the reference setting value of the limit switch through the interactive interface.

2. The device according to claim 1, characterized in that A mounting flange is provided on the upper portion of the workbench, and an electric actuator is fixedly connected to the upper portion of the mounting flange. The sizes of the mounting flange, the input support and the input interface are adjustable.

3. The device according to claim 1, characterized in that Test types also include: revolution number calibration and bypass time calibration.

4. The device according to claim 3, characterized in that When the test type is calibration of the number of turns, the parameter to be calibrated is the preset number of turns. The host computer generates a test instruction to trigger the electric actuator to rotate in a preset direction through the controller; the host computer monitors the electric rotation process and collects the actual number of turns of the electric actuator. When the actuator rotates to the physical limit position, the first travel switch signal is triggered. The host computer determines the first end point of the electric actuator stroke based on the collected first travel switch signal, and compares whether the preset number of turns is consistent with the actual collected number of turns, thereby judging whether the preset number of turns is qualified. Based on the qualified number of turns N, the host computer rotates N times in the opposite direction with the first end point as the reference point to trigger the second travel switch signal, and determines the second end point of the electric actuator stroke based on the signal sent by the second travel switch. The host computer finally determines the effective stroke range of the electric actuator through the first end point and the second end point, and establishes a mapping relationship between the number of turns and the actual position.

5. The device according to claim 3, characterized in that When the test type is bypass time calibration, the parameters to be calibrated are the preset bypass time and the preset number of bypass stroke revolutions. The upper computer generates a test instruction and triggers the electric actuator to start through the controller. Then, the upper computer controls the simulated valve of the pneumatic brake system to fully close through the controller. When the electric actuator triggers the closing torque switch signal, the moment when the closing torque switch signal is triggered is used as the starting moment, and the time from the starting moment to the moment when the electric actuator stops is used as the actual bypass time of the electric actuator. The number of revolutions of the electric actuator within the actual bypass time is collected as the actual number of bypass stroke revolutions. The upper computer compares the actual bypass time and the actual bypass stroke revolutions with the preset bypass time and the preset bypass stroke revolutions to determine whether the preset bypass time and the preset bypass stroke revolutions are reasonable, and prompts the operator to adjust the reference setting value of the bypass switch through the interactive interface.

6. The device according to claim 1, characterized in that The host computer can also generate calibration curves for each test type and verify calibration accuracy after the test is completed.

7. The device according to claim 1, characterized in that The power of the pneumatic brake is achieved by controlling the air pressure output to the pneumatic brake through an electric proportional valve.

8. The device according to claim 7, characterized in that The electric proportional valve control method includes: the controller converts the preset pressure corresponding to the current moment into a first voltage signal input into the control loop according to the preset torque change trend, and converts the pressure signal collected by the pressure sensor into a second voltage signal input into the control loop. The first voltage signal and the second voltage signal constitute a negative feedback control to control and adjust the air supply solenoid valve and the exhaust solenoid valve switch of the electric proportional valve. When the pressure value collected by the pressure sensor does not exceed the preset pressure, the air supply solenoid valve is energized and opened to allow the air source to enter the pneumatic component, increasing the friction of the pneumatic brake; when the pressure feedback pressure of the pressure sensor is greater than the preset pressure, the exhaust solenoid valve is energized and opened, and the gas in the pneumatic component is discharged, reducing the friction of the pneumatic brake; the pilot valve and the air supply solenoid valve are electrically connected, and the controller controls the operation of the air supply solenoid valve through the pilot valve.

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