Electromagnetic force testing device and testing method for electromagnetic valve

Abstract

This invention discloses an electromagnetic force testing device and method for electromagnetic valves, relating to the field of electromagnetic valve testing. The valve sleeve of the electromagnetic valve under test is fitted into a clamping cavity formed between upper and lower fixed supports. The lower fixed support is fixedly connected to an XY moving platform, which drives the valve sleeve of the electromagnetic valve under test to move. A micrometer is installed on the left side of the platform, with the micrometer head in close contact with the left end face of the platform, causing the platform to move horizontally. A measurement module measures the platform displacement and the electromagnetic force of the valve core, and transmits this data through a signal detection, amplification, and transmission module to a hardware-in-the-loop simulation control module, which then uploads it to a host computer. The simulation control module receives control signals from the host computer, amplifies them, and provides energy to the coil. The host computer receives data output from the simulation control module or provides control signals to the electromagnetic valve under test. This invention achieves precise displacement control of small-displacement, high-speed electromagnetic valves while flexibly adjusting the testing tasks according to different testing requirements, exhibiting excellent flexible testing characteristics.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic valve testing technology, specifically to an electromagnetic force testing device and method for electromagnetic valves. Background Technology

[0002] Hydraulic transmission technology is widely recognized as the "lifeblood" of industry, providing crucial support for the stable operation and efficient functioning of various industrial equipment. In today's era where green, intelligent, and digital development have become core themes of progress, the digital transformation of hydraulic transmission technology has become an inevitable trend. In promoting the digitalization of hydraulic transmission technology, solenoid valves, with their significant advantages such as rapid dynamic response, low cost, zero leakage, and support for direct digital drive, are a core component for realizing digital hydraulic transmission technology. Their performance directly affects the overall performance of the digital hydraulic component-level system.

[0003] Currently, the static and dynamic characteristics of current-electromagnetic force-displacement are the core key indicators for evaluating the performance of solenoid valves. However, in pursuit of high dynamic response characteristics, existing solenoid valves generally adopt a small stroke displacement design. While this design helps improve response speed, it brings unprecedented challenges to existing measurement mechanisms and platforms. Traditional measurement methods often struggle to balance efficiency, convenience, and accuracy when faced with the measurement requirements of small displacements and high-frequency responses. Taking a high-speed solenoid valve electromagnetic force testing device for automotive braking systems disclosed in CN110440976B as an example, it achieves static and dynamic testing of the electromagnetic force of high-speed solenoid valves in automotive braking systems by adjusting the air gap between the moving iron and stationary iron of the solenoid valve and by subjecting the solenoid valve to the same spring force as in actual operation. However, this solution still cannot meet the measurement requirements of small displacements and lacks automatic testing of the solenoid valve coil current. In addition, its signal acquisition and display system has poor real-time performance, and the flexibility and efficiency of the test are also severely insufficient.

[0004] Therefore, developing an experimental platform capable of efficiently, conveniently, and accurately measuring the static and dynamic characteristics of electromagnetic force-coil current-displacement of small-displacement, high-frequency response solenoid valves has become a key technical challenge that urgently needs to be addressed. Summary of the Invention

[0005] 1. The technical problem to be solved:

[0006] To address the aforementioned technical problems, this invention provides an electromagnetic force testing device and method for electromagnetic valves, enabling precise displacement control of high-speed electromagnetic valves with small displacements and meeting the testing requirements of various types of electromagnetic valves.

[0007] 2. Technical Solution:

[0008] An electromagnetic force testing device for an electromagnetic valve includes a mechanical mounting module, a measurement module, a signal detection, amplification, and transmission module, a hardware-in-the-loop simulation control module, and a host computer. The electromagnetic valve under test is mounted in the mechanical mounting module. The mechanical mounting module, from top to bottom, includes an upper fixed bracket, a lower fixed bracket, an XY displacement moving platform, and a lower connecting plate. The valve sleeve of the electromagnetic valve under test is fixedly fitted into the clamping cavity formed between the upper and lower fixed brackets. The lower fixed bracket is fixedly connected to the XY displacement moving platform. When the XY displacement moving platform moves left and right or back and forth, it drives the valve sleeve of the electromagnetic valve under test to move simultaneously. An L-shaped bracket for mounting a micrometer extends outward from the left side of the XY displacement moving platform. During testing, the front end of the micrometer head of the micrometer is in close contact with the left end face of the XY displacement moving platform. The left and right movement of the micrometer head drives the XY displacement moving platform to move horizontally accordingly. The bottom surface of the XY displacement moving platform is fixed to the upper surface of the lower connecting plate.

[0009] The measurement module measures the displacement data of the XY displacement platform and the electromagnetic force data of the valve core. The collected data is amplified by the signal detection, amplification, and transmission module before being transmitted to the hardware-in-the-loop (HIL) simulation control module. The HIL simulation control module is equipped with a PCI data acquisition card to upload the data collected by the measurement module to the host computer. Simultaneously, the HIL simulation control module can receive control signals from the host computer and transmit them to the signal detection, amplification, and transmission module to amplify the control signals. The amplified control signals are then transmitted to the drive coil of the solenoid valve under test to provide driving energy to the solenoid valve. The host computer is equipped with simulation interaction software that receives data output from the HIL simulation control module or outputs control signals to the HIL simulation control module to provide control signals to the solenoid valve under test.

[0010] Furthermore, the measurement module includes a laser displacement sensor, a force transmission probe, and a force sensor; the laser displacement sensor is used to measure the displacement data of the platform when the XY displacement moving platform drives the valve sleeve to move, and this displacement data serves as the displacement data of the valve core; the axial direction of the force transmission probe and the force sensor, and the extension and retraction direction of the solenoid valve core are on the same straight line; the outer side of the force transmission probe is hemispherical, and during measurement, the spherical surface of the force transmission probe is in close contact with the end of the valve core of the solenoid valve being measured, while the force sensor measures the electromagnetic force received by the force transmission probe at this time.

[0011] Furthermore, it also includes an optical experimental platform for fixing the mechanical mounting module and the measurement module; the lower connecting plate of the mechanical mounting module is fixed to the upper surface of the optical experimental platform; the force transmission probe and force sensor of the measurement module are fixedly connected to the upper surface of the optical experimental platform through a backing plate.

[0012] Furthermore, the signal detection, amplification, and transmission module includes a current sensor and a power amplifier; the control signal output by the hardware-in-the-loop control module is transmitted sequentially through the power amplifier and the current sensor to the coil of the solenoid valve under test to provide power to the solenoid valve.

[0013] Furthermore, in the mechanical mounting module, the part where the XY displacement moving platform contacts the micrometer head of the micrometer is a raised hemispherical shape.

[0014] Furthermore, the laser displacement sensor is fixed and adjusted in position by a universal fine-tuning magnetic support rod; during testing, the test point of the laser displacement sensor is aligned with the left end face of the XY displacement moving platform, and the displacement of the valve core of the solenoid valve under test is measured in real time by measuring the displacement of the left end face.

[0015] Furthermore, after receiving signals from the force sensor, laser displacement sensor, and current sensor, the hardware-in-the-loop simulation control module processes and converts the received signals before transmitting them to the host computer for display and interactive operation.

[0016] A method for testing the electromagnetic force of a solenoid valve includes the following steps:

[0017] Step 1: Test Preparation; Fix the solenoid valve under test in the clamping frame between the lower and upper fixed brackets; Adjust the micrometer to ensure that the front end of the valve core of the solenoid valve under test is in close contact with the ball head of the force transmission probe; Manually adjust the universal fine-tuning magnetic support rod of the laser displacement sensor to align the test point of the laser displacement sensor with the moving plane of the XY displacement platform; Turn on the host computer and the corresponding control software;

[0018] Step 2: Input the control signal for the solenoid valve into the host computer. The control signal is generated by the hardware-in-the-loop control module and transmitted to the power amplifier to generate a signal that meets the driving requirements of the solenoid valve under test. The coil of the solenoid valve under test starts to work and generates a magnetic field, which generates electromagnetic force. The electromagnetic force is transmitted to the valve core through the guide rod of the solenoid valve under test, causing the valve core to move to the right. The force in close contact with it is the electromagnetic force generated in this process and is the force measured by the probe.

[0019] Step 3: Testing the electromagnetic force of the solenoid valve; using a current sensor to perform non-contact measurement of the current in the cable between the power amplifier and the solenoid valve under test; force sensor, current sensor and laser displacement sensor collect the signals generated in this process and transmit the collected signals to the hardware-in-the-loop control module. The hardware-in-the-loop control module converts the acquired signals and displays the information of the valve core electromagnetic force in the host computer.

[0020] Step 4: Test the electromagnetic force on the valve core under different output displacements; manually adjust the micrometer screw gauge to move the XY displacement platform away from or closer to the force transmission probe in the horizontal direction, so as to adjust the distance between the front end of the ball of the force transmission probe and the front end of the valve core, thereby controlling the valve core displacement; test the electromagnetic force at different valve core displacements obtained in Steps 2 and 3.

[0021] Step 5: Test the characteristic relationship between the solenoid valve coil current and electromagnetic force under different driving voltages; input different driving voltage values ​​into the host computer, the preset software in the hardware-in-the-loop simulation control module calculates the driving voltage value and transmits the calculated driving voltage to the signal power amplification module; the signal power amplification module amplifies the power according to the received driving signal and transmits the amplified signal to the driving coil of the solenoid valve under test; based on steps 3 and 4, the relationship between coil current, valve core displacement and electromagnetic force under different driving voltages is obtained.

[0022] Furthermore, in step two, the control signal is a voltage signal.

[0023] 3. Beneficial effects:

[0024] (1) The electromagnetic force testing device for an electromagnetic valve disclosed in this invention is designed with an XY displacement moving platform that can move synchronously with the valve sleeve of the electromagnetic valve in order to realize the measurement and control of the valve core displacement. By utilizing the relativity of the movement between the valve sleeve and the valve core, the displacement of the valve sleeve, i.e. the displacement of the XY displacement moving platform, is collected as the displacement of the valve core. At the same time, the high-resolution displacement output of the micrometer is used when adjusting the displacement, thus successfully realizing the precise displacement control of the small displacement high-speed electromagnetic valve.

[0025] (2) In the electromagnetic force testing device for electromagnetic valve disclosed in this invention, the axial distance between the XY displacement moving platform and the force transmission probe is adjustable, that is, the axial position of the electromagnetic valve under test can be adjusted, which can meet the testing requirements of various types of electromagnetic valves.

[0026] (3) The electromagnetic force testing method for an electromagnetic valve disclosed in this invention utilizes a test control module constructed through a hardware-in-the-loop simulation control module. This module can flexibly adjust the test tasks according to different test requirements, exhibiting excellent flexible testing characteristics. Furthermore, this module can automatically collect test data and realize real-time data display and report generation through a computer, significantly improving the human-computer interaction performance of the testing device. Attached Figure Description

[0027] Figure 1 This is an overall schematic diagram of an electromagnetic force testing device for an electromagnetic valve according to the present invention;

[0028] Figure 2 This is a schematic diagram of the mechanical mounting module involved in the present invention;

[0029] Figure 3 This is a perspective view of the mechanical mounting module involved in this invention;

[0030] Figure 4 This is a schematic diagram of the structure between the XY displacement moving platform and the micrometer in this invention;

[0031] Figure 5 This is a flowchart of the testing method of the present invention.

[0032] Figure labeling: 1. Micrometer; 2. XY displacement platform; 3. Upper connecting plate; 4. Lower fixed bracket; 5. Upper fixed bracket; 6. Force transmission probe; 7. Force sensor; 8. Support plate; 9. Laser displacement sensor; 10. Lower connecting plate; 11. Connecting plate; 12. Optical experimental platform; 13. Current sensor; 14. Power amplifier; 15. Hardware-in-the-loop control module; 16. Host computer. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings.

[0034] As attached Figures 1 to 4 As shown, an electromagnetic force testing device for an electromagnetic valve includes a mechanical mounting module, a measurement module, a signal detection, amplification, and transmission module, a hardware-in-the-loop control module 15, and a host computer 16. The electromagnetic valve under test is installed in the mechanical mounting module. The mechanical mounting module includes, from top to bottom, an upper fixed bracket 5, a lower fixed bracket 4, an XY displacement moving platform 2, and a lower connecting plate 10. The valve sleeve of the electromagnetic valve under test is fixedly fitted into the clamping cavity formed between the upper fixed bracket 5 and the lower fixed bracket 4. The lower fixed bracket 4 is fixedly connected to the XY displacement moving platform 2. When the XY displacement moving platform 2 moves left and right or back and forth, it drives the valve sleeve of the electromagnetic valve under test to move simultaneously. The left side of the XY displacement moving platform 2 extends outward to install an L-shaped bracket for mounting a micrometer 1. During testing, the front end of the micrometer head of the micrometer 1 is in close contact with the left end face of the XY displacement moving platform 2. The left and right movement of the micrometer head drives the XY displacement moving platform 2 to move horizontally accordingly. The bottom surface of the XY displacement moving platform 2 is fixed to the upper surface of the lower connecting plate 10.

[0035] The measurement module measures the displacement data of the XY displacement platform 2 and the electromagnetic force data of the valve core. The collected data is amplified by the signal detection, amplification, and transmission module and then transmitted to the hardware-in-the-loop (HILL) control module 15. The HILL control module 15 is equipped with a PCI data acquisition card, which uploads the data collected by the measurement module to the host computer 16. Simultaneously, the HILL control module 15 can receive control signals from the host computer 16 and transmit them to the signal detection, amplification, and transmission module to amplify the control signals. The amplified control signals are then transmitted to the drive coil of the solenoid valve under test to provide driving energy to the solenoid valve. The host computer 16 is equipped with simulation interaction software, which receives data output from the HILL control module 15 or outputs control signals to the HILL control module 15 to provide control signals to the solenoid valve under test.

[0036] Furthermore, the measurement module includes a laser displacement sensor 9, a force transmission probe 6, and a force sensor 7. The laser displacement sensor 9 is used to measure the displacement data of the platform when the XY displacement moving platform 2 moves the valve sleeve, and this displacement data serves as the displacement data of the valve core. The axial directions of the force transmission probe 6 and the force sensor 7 are on the same straight line as the extension and retraction direction of the solenoid valve core. The outer side of the force transmission probe 6 is hemispherical. During measurement, the spherical surface of the force transmission probe 6 is in close contact with the end of the valve core of the solenoid valve being measured, while the force sensor 7 measures the electromagnetic force received by the force transmission probe 6 at this time.

[0037] Furthermore, it also includes an optical experimental platform 12 for fixing the mechanical mounting module and the measurement module; the lower connecting plate 10 of the mechanical mounting module is fixed to the upper surface of the optical experimental platform 12; the force transmission probe 6 and the force sensor 7 of the measurement module are fixedly connected to the upper surface of the optical experimental platform 12 through the abutment plate 8.

[0038] Furthermore, the signal detection, amplification, and transmission module includes a current sensor 13 and a power amplifier 14; the control signal output by the hardware-in-the-loop control module 15 is transmitted sequentially through the power amplifier 14 and the current sensor 13 to the coil of the solenoid valve under test to provide power to the solenoid valve.

[0039] Furthermore, in the mechanical mounting module, the part where the XY displacement moving platform 2 contacts the micrometer head of the micrometer 1 is a raised hemispherical shape.

[0040] Furthermore, the laser displacement sensor 9 is fixed and adjusted in position by a universal fine-tuning magnetic support rod; during testing, the test point of the laser displacement sensor 9 is aligned with the left end face of the XY displacement moving platform 2, and the displacement of the valve core of the solenoid valve under test is measured in real time by measuring the displacement of the left end face.

[0041] Furthermore, after receiving signals from the force sensor 7, the laser displacement sensor 9, and the current sensor 13, the hardware-in-the-loop simulation control module 15 processes and converts the received signals before transmitting them to the host computer 16 for display and interactive operation.

[0042] A method for testing the electromagnetic force of a solenoid valve includes the following steps:

[0043] Step 1: Test Preparation; Fix the solenoid valve under test in the clamping frame between the lower fixed bracket 4 and the upper fixed bracket 5; Adjust the micrometer 1 so that the front end of the valve core of the solenoid valve under test is in close contact with the front ball head of the force transmission probe 6; Manually adjust the universal fine-tuning magnetic support rod of the laser displacement sensor 9 so that the test point of the laser displacement sensor 9 corresponds to the moving plane of the XY displacement moving platform; Turn on the host computer 16 and the corresponding control software;

[0044] Step 2: Input the control signal for the solenoid valve through the host computer 16. The control signal is generated by the hardware-in-the-loop control module 15 and transmitted to the power amplifier 14 to generate a signal that meets the driving requirements of the solenoid valve under test. The coil of the solenoid valve under test starts to work and generates a magnetic field, which generates electromagnetic force. The electromagnetic force is transmitted to the valve core through the guide rod of the solenoid valve under test, causing the valve core to move to the right. The force that is in close contact with it is the electromagnetic force generated in this process, which is the force measured by the probe 6.

[0045] Step 3: Testing the electromagnetic force of the solenoid valve; using current sensor 13 to perform non-contact measurement of the current in the cable between power amplifier 14 and the solenoid valve under test; force sensor 7, current sensor 13 and laser displacement sensor 9 collect the signals generated in this process and transmit the collected signals to the hardware-in-the-loop simulation control module 15. The hardware-in-the-loop simulation control module 15 converts the acquired signals and displays the information of the valve core electromagnetic force in the host computer 16.

[0046] Step 4: Test the electromagnetic force on the valve core under different output displacements; manually adjust the micrometer 1 to move the XY displacement platform 2 away from or closer to the force transmission probe 6 in the horizontal direction, so as to adjust the distance between the front end of the ball of the force transmission probe 6 and the front end of the valve core, thereby controlling the displacement of the valve core; test the electromagnetic force at different valve core displacements obtained in Steps 2 and 3.

[0047] Step 5: Test the characteristic relationship between the solenoid valve coil current and electromagnetic force under different driving voltages; input different driving voltage values ​​into the host computer 16, the preset software in the hardware-in-the-loop control module 15 calculates the driving voltage value and transmits the calculated driving voltage to the signal power amplification module; the signal power amplification module amplifies the power according to the received driving signal and transmits the amplified signal to the driving coil of the solenoid valve under test; based on steps 3 and 4, obtain the relationship between coil current, valve core displacement and electromagnetic force under different driving voltages.

[0048] Furthermore, in step two, the control signal is a voltage signal.

[0049] Example 1:

[0050] As attached Figure 1 , 2 Figure 3 is a schematic diagram of this embodiment. In this embodiment, the micrometer is axially mounted to the XY displacement platform via a thread, and is tightly fitted to the hemispherical boss on the left side of the XY displacement platform. By adjusting the micrometer, the displacement of the solenoid valve under test in the left and right directions can be precisely adjusted.

[0051] In this embodiment, the bottom of the lower fixed bracket has two threaded holes, and an upper connecting plate 3 is provided between the lower fixed bracket and the XY displacement moving platform. During installation, screws are passed through the countersunk holes at the bottom of the upper connecting plate 3, and the lower fixed bracket is securely fixed to the upper surface of the upper connecting plate by means of the threaded engagement. The upper part of the lower fixed bracket is designed with a semi-circular hole structure, which matches the semi-circular hole at the bottom of the upper fixed bracket. The two work together to form the clamping cavity of the solenoid valve under test, realizing the initial positioning and fixation of the solenoid valve under test. In addition, threaded holes are provided on both sides of the upper part of the lower fixed bracket, and screws are used to connect and tighten the two sides of the upper and lower fixed brackets to generate sufficient locking force, further ensuring the stable installation of the solenoid valve under test.

[0052] In this embodiment, the XY moving platform consists of three parts arranged from top to bottom: a forward / backward moving sub-platform, a left / right moving sub-platform, and a fixed sub-platform. Both moving sub-platforms are equipped with structures capable of moving along their respective directions. (See attached diagram.) Figure 1 , 2 In this design, the L-shaped bracket is connected to the left side of the fixed sub-platform. Through holes are provided on both sides of the fixed sub-platform, through which screws are passed to reliably connect it to the optical platform. The sub-platform can be moved left and right, adjusted using a micrometer, allowing it to move together with the lower fixed bracket and the valve sleeve of the solenoid valve being measured.

[0053] In this embodiment, the left side of the force transmission probe is designed as a spherical structure to ensure that the electromagnetic force generated by the valve core of the solenoid valve under test is not interfered with by other external factors during transmission, thereby accurately transmitting it to the force sensor and effectively improving the test accuracy. In addition, the right side of the force transmission probe is provided with an external thread structure. With the help of this structure, it can be conveniently and securely installed and connected with the threaded hole pre-set on the left side of the force sensor, ensuring the reliability and stability of the entire testing device.

[0054] In this embodiment, the upper end of the abutment plate of the fixed force transmission probe and force sensor device is provided with a through hole structure. During installation, a screw is passed through the through hole and threadedly connected to a pre-set threaded hole on the right side of the force sensor, thereby fixing the force sensor. In addition, the lower end face of the abutment plate is designed with a threaded hole. By passing a screw through the countersunk hole on the bottom surface of the connecting plate 11 and engaging with the threaded hole, the abutment plate can be firmly fixed to the upper surface of the connecting plate 11, ensuring the stability of the force transmission probe and force sensor device structure.

[0055] In this embodiment, the laser displacement sensor is fixed and adjusted using a universal micro-adjustable magnetic support rod. Fine adjustment of this support rod ensures that the test point of the laser displacement sensor is precisely aligned with the left end face of the XY displacement platform, thereby enabling real-time measurement of the displacement of the solenoid valve core. The hardware-in-the-loop control module receives signals from the host computer and converts them into the high-power voltage signal required by the solenoid valve. This signal is then transmitted via cable, passing through a current sensor, and finally reaching the coil of the solenoid valve. Furthermore, the hardware-in-the-loop control module also receives sensing signals from the force sensor, laser displacement sensor, and current sensor. After processing and converting these signals, they are transmitted to the computer for display and interactive operation.

[0056] Example 2:

[0057] This embodiment is used to illustrate the working principle of the testing device and testing method of this application, and specifically includes the following steps:

[0058] A1: First, the solenoid valve under test is precisely installed between the lower and upper fixed brackets, ensuring a secure installation to prevent displacement during subsequent testing, thus guaranteeing the accuracy and reliability of the test data. Then, the initial position of the solenoid valve is finely adjusted using a micrometer and an XY displacement platform. Through precise measurement with the micrometer and precise movement of the XY displacement platform, the valve core of the solenoid valve is brought into close contact with the left ball head of the force transmission probe in its initial position, creating favorable initial conditions for subsequent characteristic measurements. Next, the omnidirectional fine-tuning magnetic support rod of the laser displacement sensor is manually adjusted so that the laser displacement sensor's measuring point corresponds to the left end face of the left-right movement platform of the XY displacement platform, enabling the measurement of the solenoid valve core displacement. Finally, the host computer and corresponding control software are turned on to complete the preparation of the entire measurement system, laying the foundation for the subsequent formal measurement of the displacement-coil current-electromagnetic force characteristics of the micro-displacement type solenoid valve.

[0059] A2: Using the interactive interface of the host computer, control signals are designed according to the specific needs of the experiment, and then accurately transmitted to the hardware-in-the-loop (HIL) simulation control module. The HIL simulation control module uses its internal PCI data acquisition card to further transmit the received signals to the power amplifier. The power amplifier amplifies the control signals, ensuring the amplified signal meets the requirements for driving the solenoid valve under test. Finally, the amplified excitation signal is transmitted via cable to the drive coil of the solenoid valve under test, providing driving energy for its normal operation.

[0060] A3: The high-power excitation voltage signal generated by the power amplifier is transmitted to the coil of the solenoid valve under test via a cable. Under the action of the excitation voltage, the coil of the solenoid valve under test starts to work and generates a magnetic field. This magnetic field acts on the armature of the solenoid valve under test, thereby generating an electromagnetic force. This electromagnetic force is transmitted to the valve core through the guide rod of the solenoid valve under test, causing the valve core to tend to move to the right. At this time, the force transmission probe can sense the force exerted on it by the valve core.

[0061] A4: The thrust transmitted by the force transmission probe is tested using a force sensor; the current in the cable between the power amplifier and the solenoid valve under test is measured non-contactly using a current sensor; and the valve core displacement is detected non-contactly using a laser displacement sensor. Subsequently, the force sensor, current sensor, and laser displacement sensor generate corresponding voltage signals based on their measured physical quantities. The hardware-in-the-loop control module acquires and processes these voltage signals using its internal PCI data acquisition card. The processed data is uploaded to a host computer for display, thus enabling human-computer interaction and providing researchers with intuitive and accurate experimental data to complete the testing of the valve core electromagnetic force under the conditions of coil current and valve core displacement.

[0062] A5: To obtain the electromagnetic thrust experienced by the valve core of the solenoid valve under test at different output displacements, a rotary micrometer is used for manual fine-tuning. This operation moves the XY displacement platform, causing the entire valve body of the solenoid valve under test to move, thereby changing the displacement of the valve core. Based on this, the characteristic relationship between different valve core displacements and electromagnetic forces of the solenoid valve under test under a specific power supply voltage condition can be obtained.

[0063] A6: To investigate the characteristic relationship between the coil current and electromagnetic force of the solenoid valve under different driving voltages, the control signal input to the hardware-in-the-loop simulation control module can be adjusted using computer simulation interactive software in the host computer, thereby achieving precise control of the input voltage of the solenoid valve under test. Subsequently, the three experimental processes A3, A4, and A5 are repeated in sequence to finally obtain the characteristic relationship between the coil current, valve core displacement, and electromagnetic force of the solenoid valve under test.

[0064] Although the present invention has been disclosed above with reference to preferred embodiments, these are not intended to limit the invention. Any person skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be defined by the scope of the claims of this application.

Claims

1. A solenoid valve electromagnetic force testing device, characterized in that: The system includes a mechanical mounting module, a measurement module, a signal detection, amplification and transmission module, a hardware-in-the-loop control module (15), and a host computer (16). The solenoid valve under test is installed in the mechanical mounting module. The mechanical mounting module includes, from top to bottom, an upper fixed bracket (5), a lower fixed bracket (4), an XY displacement moving platform (2), and a lower connecting plate (10). The valve sleeve of the solenoid valve under test is fixedly fitted into the clamping cavity formed between the upper fixed bracket (5) and the lower fixed bracket (4). The lower fixed bracket (4) and the XY displacement moving platform (2) The XY displacement moving platform (2) is fixedly connected. When the XY displacement moving platform (2) moves left and right or back and forth, it drives the valve sleeve of the solenoid valve under test to move simultaneously. The left side of the XY displacement moving platform (2) extends outward to install the L-shaped bracket of the micrometer (1). During the test, the front end of the micrometer head of the micrometer (1) is in close contact with the left end face of the XY displacement moving platform (2). The left and right movement of the micrometer head drives the XY displacement moving platform (2) to move horizontally in a corresponding left and right direction. The bottom surface of the XY displacement moving platform (2) is fixed to the upper surface of the lower connecting plate (10). The measurement module is used to measure the displacement data of the XY displacement moving platform (2) and the electromagnetic force data of the valve core. The collected data is amplified by the signal detection, amplification and transmission module and then transmitted to the hardware-in-the-loop simulation control module (15). The hardware-in-the-loop simulation control module (15) is equipped with a PCI data acquisition card to upload the data collected by the measurement module to the host computer (16). At the same time, the hardware-in-the-loop simulation control module (15) can also receive the control signal from the host computer (16) and transmit it to the signal detection, amplification and transmission module to amplify the control signal. Then, the amplified control signal is transmitted to the drive coil of the solenoid valve under test to provide driving energy for the solenoid valve. The host computer (16) is equipped with simulation interaction software to receive the data output by the hardware-in-the-loop simulation control module (15) or output the control signal to the hardware-in-the-loop simulation control module (15) to provide the control signal for the solenoid valve under test.

2. The electromagnetic force testing device for an electromagnetic valve according to claim 1, characterized in that: The measurement module includes a laser displacement sensor (9), a force transmission probe (6), and a force sensor (7). The laser displacement sensor (9) is used to measure the displacement data of the platform when the XY displacement moving platform (2) moves the valve sleeve. This displacement data is used as the displacement data of the valve core. The axial direction of the force transmission probe (6) and the force sensor (7) and the extension and retraction direction of the solenoid valve core are on the same straight line. The outer side of the force transmission probe (6) is hemispherical. During measurement, the spherical surface of the force transmission probe (6) is in close contact with the end of the valve core of the solenoid valve being measured. At the same time, the force sensor (7) measures the electromagnetic force received by the force transmission probe (6) at this time.

3. The electromagnetic force testing device for an electromagnetic valve according to claim 2, characterized in that: It also includes an optical experimental platform (12) for fixing the mechanical mounting module and the measurement module; the lower connecting plate (10) of the mechanical mounting module is fixed to the upper surface of the optical experimental platform (12); the force transmission probe (6) and the force sensor (7) of the measurement module are fixedly connected to the upper surface of the optical experimental platform (12) through the abutment plate (8).

4. The electromagnetic force testing device for an electromagnetic valve according to claim 1, characterized in that: The signal detection, amplification and transmission module includes a current sensor (13) and a power amplifier (14); the control signal output by the hardware-in-the-loop control module (15) is transmitted to the coil of the solenoid valve under test through the power amplifier (14) and the current sensor (13) in sequence to provide power to the solenoid valve.

5. The electromagnetic force testing device for an electromagnetic valve according to claim 1, characterized in that: In the mechanical installation module, the part where the XY displacement moving platform (2) contacts the micrometer head of the micrometer (1) is a raised hemispherical shape.

6. The electromagnetic force testing device for an electromagnetic valve according to claim 2, characterized in that: The laser displacement sensor (9) is fixed and adjusted in position by a universal fine-tuning magnetic support rod. During testing, the test point of the laser displacement sensor (9) is aligned with the left end face of the XY displacement moving platform (2). The displacement of the valve core of the solenoid valve under test is measured in real time by measuring the displacement of the left end face.

7. The electromagnetic force testing device for an electromagnetic valve according to claim 2, characterized in that: The hardware-in-the-loop simulation control module (15) receives signals collected from the force sensor (7), laser displacement sensor (9) and current sensor (13), processes and converts the received signals, and then transmits them to the host computer (16) for display and interactive operation.

8. A method for testing the electromagnetic force of a solenoid valve, comprising measuring the electromagnetic force using the solenoid valve electromagnetic force testing device as described in any one of claims 1-7, characterized in that: Includes the following steps: Step 1: Test preparation; Fix the solenoid valve to be tested in the clamping frame between the lower fixed bracket (4) and the upper fixed bracket (5); Adjust the micrometer (1) so that the front end of the valve core of the solenoid valve to be tested makes close contact with the ball head of the front end of the force transmission probe (6); Manually adjust the universal fine-tuning magnetic support rod of the laser displacement sensor (9) so that the test point of the laser displacement sensor (9) corresponds to the moving plane of the XY displacement moving platform; Turn on the host computer (16) and the corresponding control software; Step 2: Input the control signal for the solenoid valve through the host computer (16). The control signal is generated by the hardware-in-the-loop control module (15) and transmitted to the power amplifier (14) to generate a signal that meets the driving requirements of the solenoid valve under test. The coil of the solenoid valve under test starts to work and generates a magnetic field, generating electromagnetic force. The electromagnetic force is transmitted to the valve core through the guide rod of the solenoid valve under test, causing the valve core to move to the right. The force that is in close contact with it is transmitted to the probe (6) to measure the force, which is the electromagnetic force generated in this process. Step 3: Testing the electromagnetic force of the solenoid valve; using a current sensor (13) to perform non-contact measurement of the current in the cable between the power amplifier (14) and the solenoid valve under test; the force sensor (7), the current sensor (13) and the laser displacement sensor (9) collect the signals generated during this process and transmit the collected signals to the hardware-in-the-loop control module (15). The hardware-in-the-loop control module (15) converts the acquired signals and displays the information of the valve core electromagnetic force in the host computer (16); Step 4: Test the electromagnetic force on the valve core under different output displacements; manually adjust the micrometer (1) to move the XY displacement moving platform (2) away from or closer to the force transmission probe (6) in the horizontal direction, so as to adjust the distance between the front end of the ball of the force transmission probe (6) and the front end of the valve core, thereby controlling the valve core displacement; test the electromagnetic force at different valve core displacements obtained in steps 2 and 3. Step 5: Test the characteristic relationship between the coil current and electromagnetic force of the solenoid valve under different driving voltages; input different driving voltage values ​​through the host computer (16), the preset software in the hardware-in-the-loop control module (15) calculates the driving voltage value and transmits the calculated driving voltage to the signal power amplification module; the signal power amplification module amplifies the power according to the received driving signal and transmits the amplified signal to the driving coil of the solenoid valve under test; based on steps 3 and 4, obtain the relationship between coil current, valve core displacement and electromagnetic force under different driving voltages.

9. A method for testing the electromagnetic force of a solenoid valve according to claim 8, characterized in that: In step two, the control signal is a voltage signal.

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