Device and method for testing electromagnetic force of electromagnetic valve

Abstract

The invention discloses an electromagnetic force testing device and method for an electromagnetic valve, and relates to the field of electromagnetic valve testing. A valve sleeve of the tested electromagnetic valve is sleeved in a clamping cavity formed between the upper and lower fixed brackets; the lower fixing support is fixedly connected with the XY mobile platform, and the platform drives the detected solenoid valve sleeve to move. The front end of a micrometer head is tightly contacted with the left end surface of the platform to drive the platform to horizontally move; the measuring module measures platform displacement and valve element electromagnetic force, and the platform displacement and the valve element electromagnetic force are transmitted to the semi-physical simulation control module through the signal detection, amplification and transmission module and then uploaded to the upper computer. The simulation control module receives an upper computer control signal and provides energy for the coil after amplification; the upper computer receives data output by the simulation control module or provides a control signal for the tested solenoid valve. According to the invention, the test task can be flexibly adjusted according to different test requirements while accurate displacement control of the small-displacement high-speed solenoid valve is realized, and good flexible test characteristics are shown.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic valve testing, in particular to an electromagnetic valve electromagnetic force testing device and testing method. BACKGROUND

[0002] Hydraulic transmission technology is recognized as the "power blood vessels" in the industrial field, and provides key support for the stable operation and efficient operation of various industrial equipment. In the current era of green, intelligent and digital, the digital transformation of hydraulic transmission technology has become an inevitable trend. In the process of promoting the digitalization of hydraulic transmission technology, electromagnetic valves, with their rapid dynamic response, low cost, zero leakage and support for direct digital driving, are the core key components of digital hydraulic transmission technology, and their performance directly affects the overall performance of digital hydraulic component-level systems.

[0003] Currently, current-electromagnetic force-displacement static and dynamic characteristics are the core key indicators for measuring the performance of electromagnetic valves. However, existing electromagnetic valves generally use small stroke displacement design to pursue high dynamic response characteristics. This design helps to improve response speed, but it brings unprecedented severe challenges to existing measurement mechanisms and platforms. Traditional measurement methods often have difficulty in balancing efficiency, convenience and accuracy when facing small displacement and high frequency response measurement requirements. For example, the high-speed electromagnetic valve electromagnetic force testing device for automobile brake system disclosed in CN110440976B, which adjusts the air gap between the moving iron and the static iron of the electromagnetic valve, and the electromagnetic valve is subjected to the same spring force as the actual one when switching, realizes static and dynamic testing of high-speed electromagnetic valve electromagnetic force in automobile brake system, but this scheme still cannot meet the measurement requirements of small displacement, and lacks automatic testing of electromagnetic valve coil current. In addition, the real-time performance of its signal acquisition and display system is poor, and the flexibility and efficiency of the test are also seriously insufficient.

[0004] Therefore, it is necessary to develop an experimental platform that can efficiently, conveniently and accurately measure the static and dynamic characteristics of small displacement, high frequency response electromagnetic valve electromagnetic force-coil current-displacement. SUMMARY

[0005] 1. The technical problem to be solved: In view of the above technical problems, the present application provides an electromagnetic valve electromagnetic force testing device and testing method, which realizes accurate displacement control of small displacement high-speed electromagnetic valves and meets the testing requirements of various types of electromagnetic valves.

[0006] 2. Technical scheme: The electromagnetic valve electromagnetic force testing device comprises a mechanical installation module, a measurement module, a signal detection amplification transmission module, a semi-physical simulation control module and a host computer; the measured electromagnetic valve is installed in the mechanical installation module; the mechanical installation module comprises an upper fixed support, a lower fixed support, an XY displacement moving platform and a lower connecting plate from top to bottom; the valve sleeve of the measured electromagnetic valve is fixedly sleeved in the clamping cavity formed between the upper fixed support and the lower fixed support; the lower fixed support is fixedly connected with the XY displacement moving platform, and when the XY displacement moving platform moves leftward or rightward or forward or backward, the valve sleeve of the measured electromagnetic valve is driven to move simultaneously; an L-shaped support for installing a screw micrometer is outwardly extended to the left side of the XY displacement moving platform, and the front end of a micrometer head of the screw micrometer is in close contact with the left end surface of the XY displacement moving platform during testing, and the micrometer head moves leftward or rightward to drive the XY displacement moving platform to move leftward or rightward correspondingly; the bottom surface of the XY displacement moving platform is fixed to the upper surface of the lower connecting plate. The measurement module is used for measuring the displacement data of the XY displacement moving platform and the electromagnetic force data of the valve core, and transmitting the collected data to the semi-physical simulation control module after amplification by the signal detection amplification transmission module; the semi-physical simulation control module is provided with a PCI data acquisition card, and the data collected by the measurement module is uploaded to the host computer; at the same time, the semi-physical simulation control module can also receive the control signal of the host computer and transmit it to the signal detection amplification transmission module to amplify the control signal, and then transmit the amplified control signal to the driving coil of the measured electromagnetic valve to provide driving energy for the electromagnetic valve; the host computer is provided with simulation interaction software, and receives the data output by the semi-physical simulation control module or outputs the control signal to the semi-physical simulation control module to provide the control signal for the measured electromagnetic valve.

[0007] Further, the measurement module comprises a laser displacement sensor, a force transmission probe and a force sensor; the laser displacement sensor is used for measuring the displacement data of the platform when the XY displacement moving platform drives the valve sleeve to move, and the displacement data is taken as the displacement data of the valve core; the axis direction of the force transmission probe and the force sensor and the stretching direction of the electromagnetic valve core are on the same straight line; the outer side of the force transmission probe is hemispherical, and the spherical surface of the force transmission probe is in close contact with the end of the valve core of the measured electromagnetic valve during measurement, and the force sensor measures the electromagnetic force borne by the force transmission probe at the moment.

[0008] Further, an optical experiment platform for fixedly installing the mechanical installation module and the measurement module is further included; the lower connecting plate of the mechanical installation module is fixed to the upper surface of the optical experiment platform; the force transmission probe and the force sensor of the measurement module are fixedly connected to the upper surface of the optical experiment platform through a resisting plate.

[0009] Further, the signal detection amplification transmission module comprises a current sensor and a power amplifier; the output control signal of the semi-physical simulation control module is transmitted to the coil of the measured electromagnetic valve through the power amplifier and the current sensor to provide power for the electromagnetic valve.

[0010] Further, in the mechanical installation module, the part where the XY displacement moving platform contacts the micrometer head of the screw micrometer is a convex hemispherical part.

[0011] Further, the laser displacement sensor is fixed and adjusted through the universal fine adjustment 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 left end face is measured to realize real-time measurement of the displacement of the measured electromagnetic valve spool.

[0012] Further, the semi-physical simulation control module receives the collected signals from the force sensor, the laser displacement sensor and the current sensor, processes and converts the received signals, and then transmits them to the upper computer for display and interactive operation.

[0013] An electromagnetic valve electromagnetic force testing method, comprising the following steps: Step one: test preparation; the measured electromagnetic valve is fixedly installed in the clamping frame between the lower fixed support and the upper fixed support; the screw micrometer is adjusted to make the front end of the measured electromagnetic valve spool and the front end ball of the force transmission probe achieve close contact; the universal fine adjustment magnetic support rod of the laser displacement sensor is manually adjusted to make the test point of the laser displacement sensor correspond to the moving plane of the XY displacement moving platform; the upper computer and the corresponding control software are turned on; Step two: the control signal for controlling the operation of the electromagnetic valve is input through the upper computer, the control signal is transmitted to the power amplifier through the semi-physical simulation control module to generate a signal that meets the driving requirements of the measured electromagnetic valve; the coil of the measured electromagnetic valve starts to work and generates a magnetic field, and electromagnetic force is generated; the electromagnetic force is transmitted to the spool through the guide rod of the measured electromagnetic valve, so that the spool has a rightward movement trend, and the force measured by the force transmission probe in close contact with the spool is the electromagnetic force generated in this process; Step three: electromagnetic force test of the electromagnetic valve; the current in the cable between the power amplifier and the measured electromagnetic valve is measured by the current sensor; the force sensor, the current sensor and the laser displacement sensor collect the signals generated in this process and transmit the collected signals to the semi-physical simulation control module; the semi-physical simulation control module converts the obtained signals to display the information of the spool electromagnetic force in the upper computer. Step four: test the electromagnetic force on the spool at different output displacements; manually adjust the micrometer screw to move the XY displacement moving platform horizontally away from or close to the force transmission probe, thereby adjusting the distance between the front end of the force transmission probe and the front end of the spool, i.e. controlling the displacement of the spool; based on steps two and three, test the electromagnetic force at different spool displacements; Step five: test the characteristic relationship between the electromagnetic valve coil current and the electromagnetic force under different driving voltages; input different driving voltage values into the upper computer respectively, and the pre-set software in the semi-physical simulation control module calculates the driving voltage values and transmits the calculated driving voltage to the signal power amplification module; the signal power amplification module realizes power amplification according to the received driving signal, and transmits the amplified signal to the driving coil of the electromagnetic valve to be tested; based on steps three and four, obtain the relationship between the coil current, the spool displacement and the electromagnetic force under different driving voltages.

[0014] Further, the control signal in step two is a voltage signal.

[0015] 3. Beneficial effects: (1) The electromagnetic valve electromagnetic force testing device disclosed in the present application is designed to realize the measurement and control of the spool displacement, and an XY displacement moving platform capable of moving synchronously with the valve sleeve of the electromagnetic valve is designed, the relative movement between the valve sleeve and the spool is utilized, and the displacement of the valve sleeve, i.e. the displacement of the XY displacement moving platform, is collected as the displacement of the spool; at the same time, the high-resolution displacement output of the micrometer screw is adopted when adjusting the displacement, thereby successfully realizing the accurate displacement control of the small-displacement high-speed electromagnetic valve.

[0016] (2) In the electromagnetic valve electromagnetic force testing device disclosed in the present application, the axial distance between the XY displacement moving platform and the force transmission probe is adjustable, i.e. the axial position of the electromagnetic valve to be tested can be adjusted, which can meet the testing requirements of various models of electromagnetic valves.

[0017] (3) The electromagnetic valve electromagnetic force testing method disclosed in the present application, through the test control module constructed by the semi-physical simulation control module, can flexibly adjust the test task according to different test requirements, and exhibits good flexible testing characteristics. In addition, the module can automatically collect test data, and realize real-time display and report generation of the data through the computer, thereby significantly improving the human-computer interaction performance of the testing device. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a schematic diagram of the whole electromagnetic valve electromagnetic force testing device of the present application; Figure 2 Fig. 3 is a structural schematic diagram of the mechanical installation module involved in the present application; Figure 3 Fig. 4 is a perspective view of the mechanical installation module involved in the present application. Figure 4 Schematic diagram of the structure between the XY displacement moving platform and the micrometer screw in the present invention; Figure 5 Flowchart of the testing method of the present invention.

[0019] Explanation of the accompanying symbols: micrometer 1; XY displacement moving platform 2; upper connecting plate 3; lower fixed bracket 4; upper fixed bracket 5; force transmission probe 6; force sensor 7; abutment plate 8; laser displacement sensor 9; lower connecting plate 10; connecting plate 11; optical experimental platform 12; current sensor 13; power amplifier 14; semi-physical simulation control module 15; host computer 16. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings.

[0021] As attached Figures 1 to 4 As shown, a solenoid valve electromagnetic force testing device includes a mechanical installation module, a measurement module, a signal detection, amplification and transmission module, a semi-physical simulation control module 15 and a host computer 16; the solenoid valve to be tested is installed in the mechanical installation module; the mechanical installation module includes an upper fixed bracket 5, a lower fixed bracket 4, an XY displacement movable platform 2 and a lower connecting plate 10 from top to bottom; the valve sleeve of the solenoid valve to be tested is fixedly sleeved in 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 movable platform 2, and when the XY displacement movable platform 2 moves left and right or forward and backward, the valve sleeve of the solenoid valve to be tested is driven to move simultaneously; the left side of the XY displacement movable platform 2 extends outwardly for installing an L-shaped bracket for a micrometer screw 1. During testing, the front end of the micrometer head of the micrometer screw 1 is in close contact with the left end face of the XY displacement movable platform 2, and the left and right movement of the micrometer head drives the XY displacement movable platform 2 to move left and right accordingly; the bottom surface of the XY displacement movable 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 mobile platform 2 and the electromagnetic force data of the valve core, and transmits the collected data to the semi-physical simulation control module 15 after amplifying it through the signal detection, amplification and transmission module; the semi-physical simulation control module 15 is provided 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 semi-physical simulation control module 15 can also receive the control signal of the host computer 16, and transmit it to the signal detection, amplification and transmission module to amplify the control signal, and then transmit the amplified control signal to the drive coil of the solenoid valve under test to provide driving energy for the solenoid valve; the host computer 16 is provided with simulation interactive software, which receives the data output by the semi-physical simulation control module 15 or outputs the control signal to the semi-physical simulation control module 15 to provide the control signal for the solenoid valve under test.

[0022] Further, the measuring module comprises 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 valve sleeve is moved by the XY displacement moving platform 2, and the displacement data is taken as the displacement data of the valve core; the axis direction of the force transmission probe 6 and the force sensor 7 and the stretching direction of the electromagnetic valve core are on the same straight line; the outer side of the force transmission probe 6 is hemispherical, and when measuring, the spherical surface of the force transmission probe 6 is in close contact with the end of the valve core of the measured electromagnetic valve, and at the same time, the force sensor 7 measures the electromagnetic force received by the force transmission probe 6.

[0023] Further, it further comprises an optical experiment platform 12 for fixedly installing the mechanical installation module and the measuring module; the lower connecting plate 10 of the mechanical installation module is fixed to the upper surface of the optical experiment platform 12; the force transmission probe 6 and the force sensor 7 of the measuring module are fixedly connected to the upper surface of the optical experiment platform 12 through the abutting plate 8.

[0024] Further, the signal detection, amplification and transmission module comprises a current sensor 13 and a power amplifier 14; the output control signal of the semi-physical simulation control module 15 is transmitted to the coil of the measured electromagnetic valve through the power amplifier 14 and the current sensor 13 in turn, so as to provide power for the electromagnetic valve.

[0025] Further, in the mechanical installation module, the part where the XY displacement moving platform 2 contacts the micrometer head of the screw micrometer 1 is convex and hemispherical.

[0026] Further, the laser displacement sensor 9 realizes the fixation and adjustment of its position through the universal fine adjustment magnetic support rod; during testing, the testing point of the laser displacement sensor 9 is aligned with the left end surface of the XY displacement moving platform 2, and the displacement size of the left end surface is measured to realize the real-time measurement of the displacement size of the valve core of the measured electromagnetic valve.

[0027] Further, the semi-physical simulation control module 15 receives the collected signals from the force sensor 7, the laser displacement sensor 9 and the current sensor 13, processes and converts the received signals, and then transmits them to the upper computer 16 for display and interactive operation.

[0028] An electromagnetic force testing method of an electromagnetic valve, comprising the following steps: Step one: test preparation; the measured electromagnetic valve is fixedly installed in the clamping frame between the lower fixed support 4 and the upper fixed support 5; the screw micrometer 1 is adjusted so that the front end of the valve core of the measured electromagnetic valve is in close contact with the front end ball of the force transmission probe 6; the universal fine adjustment magnetic support rod of the laser displacement sensor 9 is manually adjusted so that the testing point of the laser displacement sensor 9 corresponds to the moving plane of the XY displacement moving platform; the upper computer 16 computer and the corresponding control software are turned on; Step 2: The control signal for controlling the operation of the solenoid valve is input through the host computer 16. The control signal is generated by the semi-physical simulation control module 15 and transmitted to the power amplifier 14 for amplification to generate a signal that meets the driving requirements of the solenoid valve under test; the solenoid valve coil under test starts to work and generates a magnetic field, generating an 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 measured by the force transmission probe 6 in close contact with it is the electromagnetic force generated in this process; Step 3: Testing the electromagnetic force of the solenoid valve; using the 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, current sensor 13, and laser displacement sensor 9 collect the signals generated during this process and transmit the collected signals to the semi-physical simulation control module 15. The semi-physical simulation control module 15 converts the acquired signals and displays the information of the electromagnetic force of the valve core on the host computer 16; Step 4: Test the electromagnetic force on the valve core at different output displacements; manually adjust the micrometer screw 1 to move the XY displacement platform 2 horizontally away from or closer to the force transmission probe 6, thereby adjusting the distance between the front end of the ball of the force transmission probe 6 and the front end of the valve core to control the displacement of the valve core; based on the electromagnetic force test results at different valve core displacements in steps 2 and 3; Step 5: Test the characteristic relationship between the solenoid valve coil current and the electromagnetic force under different driving voltages; input different driving voltage values ​​through the host computer 16, and the preset software in the semi-physical simulation 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 realizes power amplification according to the received driving signal, and transmits the amplified signal to the solenoid valve driving coil under test; based on steps three and four, the relationship between coil current-valve core displacement-electromagnetic force under different driving voltages is obtained.

[0029] Furthermore, in step 2, the control signal is a voltage signal.

[0030] Example 1: As attached Figure 1 、 2 Figures 3 and 4 are schematic diagrams of this embodiment. In this embodiment, the micrometer screw is axially mounted to the XY displacement platform via threads and fits tightly against the hemispherical boss on the left side of the XY displacement platform. By adjusting the micrometer screw, the left-right displacement of the solenoid valve under test can be precisely adjusted.

[0031] In the embodiment, the bottom of the lower fixing support is provided with two threaded holes, and an upper connecting plate 3 is arranged between the lower fixing support and the XY displacement moving platform. During installation, the threaded holes are passed through the counterbores in the bottom of the upper connecting plate 3, and the lower fixing support is stably fixed to the upper surface of the upper connecting plate by the screwing action. The upper part of the lower fixing support is designed as a semicircular hole structure, which is matched with the semicircular hole in the bottom of the upper fixing support, and the two structures cooperatively form a clamping cavity of the measured electromagnetic valve to realize the preliminary positioning and fixing of the measured electromagnetic valve. In addition, the upper part of the lower fixing support is provided with threaded holes on both sides, and the two sides of the upper and lower fixing supports are connected and fastened by screws to generate sufficient locking force, thereby further ensuring the stable installation of the measured electromagnetic valve.

[0032] In the embodiment, the XY moving platform is sequentially provided with a front-back direction moving sub-platform, a left-right direction moving sub-platform and a fixed sub-platform from top to bottom, and both moving sub-platforms are provided with structures capable of moving in the corresponding direction. As shown in FIG. 2, the front-back direction moving sub-platform is connected to the fixed sub-platform by an L-shaped support. Figure 1 、 2 In the embodiment, the L-shaped support is connected to the left side of the fixed sub-platform. In the scheme, the fixed sub-platform is provided with through holes on both sides, and the screws are reliably connected with the optical platform; the left-right direction moving sub-platform is adjusted by the screw micrometer to realize the movement of the left-right direction moving sub-platform together with the lower fixing support and the valve sleeve of the measured electromagnetic valve.

[0033] In the embodiment, the left side of the force transmission probe is designed as a spherical structure to ensure that the electromagnetic force generated by the measured electromagnetic valve spool is not disturbed by other external factors during the transmission process, thereby being accurately and correctly transmitted 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, which can be conveniently and stably connected with the threaded hole pre-set on the left side of the force sensor to ensure the reliability and stability of the entire test device.

[0034] In the embodiment, the through hole structure is arranged on the upper end of the abutment plate of the fixed force transmission probe and force sensor device. During installation, the screw is passed through the through hole and threadedly connected with the threaded hole pre-set on the right side of the force sensor, thereby realizing the fixation of the force sensor. In addition, the lower end surface of the abutment plate is designed as a threaded hole, and the screw is passed through the counterbores in the bottom surface of the connecting plate 11 and cooperates with the threaded hole to stably fix the abutment plate on the upper surface of the connecting plate 11, thereby ensuring the stability of the structure of the force transmission probe and force sensor device.

[0035] In this embodiment, the laser displacement sensor is fixed and adjusted by means of a universal fine-tuning magnetic support rod. Through fine adjustment of the support rod, the test point of the laser displacement sensor can be accurately aligned with the moving end face of the XY displacement moving platform, and the displacement of the measured electromagnetic valve spool can be measured in real time. The semi-physical simulation control module receives signals from the host computer and converts them into high-power voltage signals required by the measured electromagnetic valve. Then, the signals are transmitted through the cable and delivered to the coil of the measured electromagnetic valve after passing through the current sensor. In addition, the semi-physical simulation control module also receives sensing signals from the force sensor, laser displacement sensor and current sensor, processes and converts these signals, and then transmits them to the computer for display and interactive operation.

[0036] Embodiment 2 This embodiment is used to illustrate the working principle of the test device and test method of the present application, which specifically includes the following steps: A1: First, the measured electromagnetic valve is accurately installed between the lower and upper fixed supports to ensure firm installation and prevent displacement of the measured electromagnetic valve during subsequent testing, thereby ensuring the accuracy and reliability of the test data. Then, the initial position of the measured electromagnetic valve is finely adjusted by means of the screw micrometer and the XY displacement moving platform. Through accurate measurement by the screw micrometer and precise movement of the XY displacement moving platform 2, the measured electromagnetic valve spool is in close contact with the left ball head of the force transmission probe at the initial position, creating good initial conditions for subsequent characteristic measurement. Second, the universal fine-tuning magnetic support rod of the laser displacement sensor is manually adjusted so that the measurement point of the laser displacement sensor corresponds to the left end face of the left and right direction moving platforms of the XY displacement moving platform, realizing measurement of the displacement of the electromagnetic valve spool. Finally, the host computer and the corresponding control software are turned on to complete the preparation work of the entire measurement system, laying a foundation for subsequent formal measurement of the displacement-coil current-electromagnetic force characteristics of the micro-displacement electromagnetic valve.

[0037] A2: By means of the interactive interface of the host computer, the control signal is designed according to the specific requirements of the experiment, and then the designed control signal is accurately transmitted to the semi-physical simulation control module. The semi-physical simulation control module uses the PCI data acquisition card equipped inside to further transmit the received signals to the power amplifier. The power amplifier implements power amplification processing on the control signal, and the amplified signal can meet the requirements of the measured electromagnetic valve drive. Finally, the amplified excitation signal is transmitted to the drive coil of the measured electromagnetic valve through the cable, providing driving energy for the normal operation of the measured electromagnetic valve.

[0038] A3: The high-power excitation voltage signal generated by the power amplifier is transmitted to the coil of the electromagnetic valve under test through a cable. Under the action of the excitation voltage, the coil of the electromagnetic valve under test starts to work and generates a magnetic field. The magnetic field acts on the armature of the electromagnetic valve under test, thereby generating an electromagnetic force. The electromagnetic force is transmitted to the spool through the guide rod of the electromagnetic valve under test, so that the spool generates a rightward movement trend. At this time, the force transmission probe can sense the force applied to it by the spool.

[0039] A4: The thrust transmitted by the force transmission probe is tested by the force sensor; the current in the cable between the power amplifier and the electromagnetic valve under test is non-contact measured by the current sensor; the displacement of the spool of the electromagnetic valve is non-contact detected by the laser displacement sensor. Subsequently, the force sensor, the current sensor and the laser displacement sensor will generate corresponding voltage signals according to the physical quantities measured by them. The semi-physical simulation control module collects and processes these voltage signals by means of the PCI data acquisition card equipped in it. The processed data will be uploaded to the host computer for display, so as to realize the man-machine interaction function, provide intuitive and accurate experimental data information for the experimenters, and complete the test of the electromagnetic force of the spool under the working condition of the coil current and the spool displacement.

[0040] A5: In order to obtain the electromagnetic thrust of the spool of the electromagnetic valve under test under different output displacements, manual fine adjustment operation is performed by using the rotary measuring micrometer. Through the operation, the XY displacement moving platform moves and drives the whole electromagnetic valve body to move, thereby realizing the change of the displacement of the spool of the electromagnetic valve under test. Based on this, the characteristic relationship between the different spool displacements and the electromagnetic force of the electromagnetic valve under test under a certain specific power supply voltage working condition can be obtained.

[0041] A6: In order to explore the characteristic relationship between the coil current and the electromagnetic force of the electromagnetic valve under test under different driving voltages, the computer simulation interaction software in the host computer can be used to adjust the control signal input to the semi-physical simulation control module, so as to realize the precise control of the input voltage of the electromagnetic valve under test. Then, the three experimental processes of A3, A4 and A5 are repeated in turn, and finally the characteristic relationship among the coil current, the spool displacement and the electromagnetic force of the electromagnetic valve under test is obtained.

[0042] Although the present application has been disclosed with the preferred embodiments as above, they are not intended to limit the present application, and any person skilled in the art can make various changes or modifications without departing from the spirit and scope of the present application, therefore the protection scope of the present application should be defined by the protection scope of the claims of the present application.

Claims

1. A solenoid valve electromagnetic force testing device, characterized by: The invention comprises a mechanical installation module, a measurement module, a signal detection amplification and transmission module, a semi-physical simulation control module (15) and a host computer (16); the electromagnetic valve to be tested is installed in the mechanical installation module; the mechanical installation module comprises, 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 to be tested is fixedly sleeved in a 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 ) are fixedly connected, and when the XY displacement moving platform (2) moves left and right or forward and backward, the valve sleeve of the electromagnetic valve to be tested is driven 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 screw (1); during testing, the front end of the micrometer head of the micrometer screw (1) is in close contact with the left end face of the XY displacement moving platform (2), and the left and right movement of the micrometer head drives the XY displacement moving platform (2) to move left and right accordingly; the bottom surface of the XY displacement moving platform (2) is fixed to the upper surface of the lower connecting plate (10); The measuring module is used to measure the displacement data of the XY displacement moving platform (2) and the electromagnetic force data of the valve core, and transmits the collected data to the semi-physical simulation control module (15) after amplifying it through the signal detection, amplification and transmission module; the semi-physical simulation control module (15) is provided with a PCI data acquisition card, which uploads the data collected by the measuring module to the host computer (16); at the same time, the semi-physical simulation control module (15) can also receive the control signal of the host computer (16), and transmit it to the signal detection, amplification and transmission module to amplify the control signal, and then transmit the amplified control signal to the drive coil of the electromagnetic valve under test to provide driving energy for the electromagnetic valve; the host computer (16) is provided with simulation interaction software, which receives the data output by the semi-physical simulation control module (15) or outputs the control signal to the semi-physical simulation control module (15) to provide the control signal for the electromagnetic valve under test.

2. The electromagnetic force testing device for a solenoid valve according to claim 1, characterized in that: The measuring module comprises 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) drives the valve sleeve to move, and the displacement data is used as the displacement data of the valve core; the axial directions of the force transmission probe (6) and the force sensor (7) and the expansion and contraction direction of the electromagnetic valve core are on the same straight line; the outer side of the force transmission probe (6) is hemispherical, and during measurement, the spherical surface of the force transmission probe (6) is in close contact with the end of the valve core of the electromagnetic valve to be measured, and the force sensor (7) measures the electromagnetic force applied to 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 fixedly mounting a mechanical mounting module and a measuring 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 measuring module are fixedly connected to the upper surface of the optical experimental platform (12) via a butt plate (8).

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

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

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 means of 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 solenoid valve core under test is measured in real time by measuring the displacement of the left end face.

7. The electromagnetic force testing device for a solenoid valve according to claim 2, characterized in that: The semi-physical simulation control module (15) receives signals collected from the force sensor (7), the laser displacement sensor (9) and the current sensor (13), processes and converts the received signals, and 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: The following steps are involved: Step 1: Test preparation; fix the solenoid valve to be tested on the clamping frame between the lower fixed bracket (4) and the upper fixed bracket (5); adjust the micrometer screw (1) so that the front end of the solenoid valve core to be tested is in close contact with the front end 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; Step 2: A control signal for controlling the operation of the solenoid valve is input through the host computer (16). The control signal is generated by the semi-physical simulation control module (15) and transmitted to the power amplifier (14) to amplify and 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, thereby generating an 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, and the force measured by the force transmission probe (6) in close contact with the valve core is the electromagnetic force generated in this process; Step 3: Testing the electromagnetic force of the solenoid valve; using the 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 in the process and transmit the collected signals to the semi-physical simulation control module (15); the semi-physical simulation control module (15) converts the obtained signals and displays the information of the electromagnetic force of the valve core in the host computer (16); Step 4: Test the electromagnetic force on the valve core at different output displacements; manually adjust the screw micrometer (1) to move the XY displacement moving platform (2) away from or close 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; based on the electromagnetic force test at different valve core displacements obtained in steps 2 and 3; Step 5: Test the characteristic relationship between the solenoid valve coil current and the electromagnetic force under different driving voltages; input different driving voltage values ​​through the host computer (16), and the preset software in the semi-physical simulation control module (15) calculates the driving voltage value and transmits the calculated driving voltage to the signal power amplifier module; the signal power amplifier module realizes power amplification according to the received driving signal, and transmits the amplified signal to the solenoid valve driving coil under test; based on steps 3 and 4, the relationship between the coil current-valve core displacement-electromagnetic force under different driving voltages is obtained.

9. A solenoid valve electromagnetic force testing method according to claim 8, characterized in that: In step 2, the control signal is a voltage signal.

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