Device for testing performance of linear driving mechanism and use method

Abstract

The invention provides equipment for testing the performance of a linear driving mechanism and a use method. The equipment comprises a control system, a data acquisition system and a motion platform. Wherein the control system starts a linear driving mechanism performance test program in the control system to carry out performance tests; the data acquisition system is responsible for acquiring parameter data such as force value, displacement and speed in real time in the testing process and feeding back the data to the control system; the motion platform is responsible for completing various performance tests of the linear driving mechanism, a servo electric cylinder and a linear guide rail in the motion platform form a test equipment action end, a lead screw of the linear driving mechanism is driven to stretch out and draw back freely, and the linear driving mechanism is loaded. Load is closed according to data acquired by the force sensor in real time. The device is reasonable in structural design, convenient to use and high in precision, meets various performance testing requirements of the linear driving mechanism, and is officially applied to the testing process of the linear driving mechanism.

Description

Technical Field

[0001] The invention relates to the field of docking mechanism assembly and testing, and in particular to a device for linear drive mechanism performance testing and a use method thereof. Background Art

[0002] In my country's booming manned lunar exploration mission, the research and development of various key technologies and components is of vital importance. Among them, the lightweight docking mechanism is a key system for achieving precise docking and separation between spacecraft, and its performance is directly related to the success or failure of the mission. The linear drive mechanism is the core component of the lightweight docking mechanism and plays an indispensable role.

[0003] In the specific structure of the lightweight docking mechanism, the docking ring is tightly connected to the docking frame through six linear drive mechanisms. These six linear drive mechanisms work together to accurately control the push-out and pull-back actions of the docking ring. This precise motion control is the basic condition for ensuring the smooth progress of the connection and separation tasks between the two aircraft. Once any of the linear drive mechanisms fails or performs poorly, the posture of the docking ring will change when it is pushed out or pulled back. Even extremely small posture deviations may cause serious consequences in the high-precision operation of aircraft docking, such as affecting the accurate docking of the connecting parts between the two aircraft, which in turn leads to the failure of the connection task to be successfully completed; in the separation stage, the separation process may also be unsmooth due to abnormal posture, and may even cause more serious situations, resulting in the complete failure of the connection and separation task.

[0004] The linear drive performance is a key factor in determining the success of the docking and separation missions between two aircraft. During the production and development of the linear drive mechanism, it must be subjected to comprehensive and accurate performance testing to strictly control product quality.

[0005] However, since the linear drive mechanism is a newly developed product, the existing various test systems and hardware platforms are all designed and constructed based on traditional mechanisms or components. Their technical parameters and test functions cannot meet the special needs of linear drive mechanism performance testing. This means that in the R&D and production links of linear drive mechanisms, there is a lack of effective testing methods to ensure that their performance meets the standards.

[0006] Through searching patent documents, it is found that the invention patent with publication number CN216717658U discloses a linear motor thrust fluctuation test platform, including a base, a stator adapter plate for mounting the stator is arranged in the middle of the base, a slide plate and an adapter plate that can slide relative to the base are arranged on the base, the slide plate is used to mount the mover, and also includes a force sensor, one end of the force sensor is fixedly connected to the slide plate, and the other end of the force sensor is fixedly connected to the adapter plate, and also includes a linear drive mechanism for driving the adapter plate to perform linear motion. This patent mainly focuses on the tests of thrust, resistance, cogging force and thrust fluctuation, and cannot perform performance tests such as measurement accuracy, power consumption, deformation of the lower fulcrum mechanism, etc.

[0007] In summary, in view of the above-mentioned problems of the prior art, researching a device for linear drive mechanism performance testing and a method for using the device has become a key task that needs to be solved urgently. Summary of the invention

[0008] In view of the defects in the prior art, an object of the present invention is to provide a device and a method for using the performance test of a linear drive mechanism.

[0009] According to the present invention, a device for linear drive mechanism performance testing includes a control system, a data acquisition system and a motion platform;

[0010] The control system starts the linear drive mechanism performance test program of the control system by issuing control instructions, performs various performance tests on the linear drive mechanism, and stores, processes and displays the test data in real time;

[0011] The data acquisition system collects the test data of the motion platform in real time and feeds the test data back to the control system;

[0012] Based on the linear drive mechanism performance test program, the motion platform completes various performance tests of the linear drive mechanism and generates test data. The motion platform includes a base plate, a bracket, a force sensor, a linear displacement sensor, a linear guide, a limit sensor and a servo electric cylinder. The servo electric cylinder and the linear guide constitute the action end of the motion platform. Driven by the linear drive mechanism performance test program, the action end drives the lead screw of the linear drive mechanism to freely extend and retract, and loads the linear drive mechanism at the same time. The size of the load is closed-loop controlled according to the real-time data of the force sensor.

[0013] Preferably, the control system includes a test function module and a motor drive module. The motor drive module includes a product motor controller, a servo motor controller and an in-position signal receiver. The product motor controller and the servo motor controller respectively issue operating instructions to the motor of the linear drive mechanism and the motor of the servo electric cylinder. The in-position signal receiver can receive the operating position signals of the lead screw in the linear drive mechanism and the lead screw in the servo electric cylinder. The test function module completes various performance tests of the linear drive mechanism.

[0014] Preferably, the test function module includes a plurality of test submodules, and the test submodules include a linear drive mechanism motion accuracy test submodule, a free follow-up resistance test submodule, a power consumption test submodule and a lower fulcrum mechanism deformation test submodule.

[0015] Preferably, the data acquisition system includes a signal acquisition module and a power supply module. During the test, the signal acquisition module collects force, displacement and speed in real time and feeds back to the control system. The power supply module includes a product motor analog module, an equipment motor power supply module and a data acquisition card power supply module.

[0016] Preferably, when the action end of the motion platform drives the lead screw of the linear drive mechanism to perform telescopic motion, the data acquisition system collects data from the force sensor in real time and feeds back to the control system. The control system displays the follow-up resistance of the linear drive mechanism. When the linear drive mechanism, as the action end, drives the lead screw to perform telescopic motion, it drives the slider magnet of the linear displacement sensor to move accordingly. By converting the motion displacement data of the slider magnet, the actual motion position of the linear drive mechanism is obtained.

[0017] Preferably, the sports platform also includes casters, feet, a force testing device and a displacement testing device; the force sensor, the linear displacement sensor, the linear guide, the limit sensor, the servo electric cylinder, the force testing device, the bracket and the displacement testing device are installed on the top of the base plate, and the casters and feet are installed on the bottom of the base plate. The casters are used to move the equipment, the feet are used to support the base plate, and the bracket is used to install the linear drive mechanism.

[0018] Preferably, the force testing device includes a product force sensor, a force sensor, an adapter and a spherical bearing. There are two adapters in total, which connect the product force sensor, the force sensor and the spherical bearing at the same time; the spherical bearing is connected to the lead screw in the servo electric cylinder.

[0019] Preferably, the displacement testing device 139 includes a linear displacement sensor, a linear drive mechanism resolver data acquisition card, mounting accessories and a slider guide rail; the linear drive mechanism resolver signal acquisition card is located in the data acquisition system; the mounting accessories connect the slider magnet to the adapter; when testing, the slider magnet will be driven and stop when the slider magnet moves to the limit sensor on the slider guide rail.

[0020] The present invention also provides a method for using a device for linear drive mechanism performance testing, using the above-mentioned device for linear drive mechanism performance testing, comprising the following steps:

[0021] Step S1, connecting the linear drive mechanism to the device, and inspecting and calibrating the device and the laser tracker before testing;

[0022] Step S2, turn on the data acquisition system and start the linear drive mechanism performance test program in the control system. After confirming that the data acquisition system and the control system are in normal working state, select the performance test task and set the parameters in the program interface;

[0023] Step S3, based on the performance test task selection, performing a performance test of the linear drive mechanism to obtain test data;

[0024] Step S4: interpreting the test result based on the test data.

[0025] Preferably, step S3 comprises:

[0026] When the measurement accuracy test is selected, first let the linear drive mechanism return to the zero position, then push the linear drive mechanism to the starting test position, and then control the linear drive mechanism to move to the end test position. During this process, read the displacement data recorded by the linear displacement sensor and the linear drive mechanism itself, and record the difference between the two as the measurement accuracy;

[0027] When the free follow-up resistance test is selected, the force sensor is first cleared to zero, and then the action end of the motion platform is unloaded and a push or pull operation is performed at a constant speed, and the data of the force sensor under the push or pull action when unloaded is recorded; then the action end of the motion platform is connected to the linear drive mechanism, and the force sensor is cleared at the same time, so that the action end of the motion platform drags the linear drive mechanism to push or pull at the same constant speed, and the data of the force sensor under the push or pull action when connected is recorded; the difference between the two is recorded as the free follow-up resistance;

[0028] When the power consumption test is selected, the action end of the motion platform outputs a preset constant force as the load of the linear drive mechanism, drives the linear drive mechanism to push or pull at a constant speed, and records the phase current, driver voltage and driver current during the movement;

[0029] When the deformation test of the lower fulcrum mechanism is selected, the motor current of the linear drive mechanism is slowly increased through the equipment, while the linear drive mechanism is kept in the starting test position, and the data of the force sensor is read in real time; when the force data of the force sensor reaches the required value, the deformation of the lower fulcrum is measured by a laser tracker.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention closely combines the specific working conditions of the linear drive mechanism in actual work to design a performance test device, which is reasonable in structure, easy to use, and highly accurate, and can meet the various performance test requirements of the linear drive mechanism. At present, this device has been successfully applied to the formal test process of the linear drive mechanism.

[0032] 2. The present invention relies on the test function module in the system control module to control the instructions and parameters of the motor to ensure that the motor runs stably according to the predetermined requirements; in addition, the running status of the motor can be monitored in real time to timely discover potential problems. At the same time, the test function module also has a powerful data processing capability, which can clearly display, safely store, conveniently browse and export the test data. More importantly, various performance tests of the linear drive mechanism can be completed within the module.

[0033] 3. The present invention also relies on the force testing device in the test equipment to realize the test function. When the servo electric cylinder in the equipment acts as the action end and drives the lead screw of the linear drive mechanism to perform telescopic movement, the force sensor will collect the resistance value of the product end to the action end in real time, which is the follow-up resistance of the linear drive mechanism during the working process. In this way, accurate data support can be provided for analyzing the performance of the linear drive mechanism under stress.

[0034] 4. The present invention also relies on the displacement testing device in the testing equipment to realize the testing function. When the linear drive mechanism as the action end drives the lead screw to perform telescopic movement, the slider magnet of the linear displacement sensor is driven to move accordingly. The displacement data generated by the movement of the slider magnet can be converted and processed to obtain the specific position information of the linear drive mechanism during the movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0036] Figure 1 is a schematic diagram of a device structure for testing the performance of a linear drive mechanism in an embodiment of the present invention;

[0037] Figure 2 It is a schematic diagram of a force testing device for a linear drive mechanism performance testing device in an embodiment of the present invention;

[0038] Figure 3 It is a schematic diagram of a displacement measuring device of a linear drive mechanism performance testing device in an embodiment of the present invention;

[0039] Figure 4 It is a test flow chart of a linear drive mechanism performance test device in an embodiment of the present invention.

[0040] in:

[0041] Control system 110, data acquisition system 120, motion table 130, linear drive mechanism 200, base plate 131-1, bracket 131-2, force sensor 132, linear displacement sensor 133, limit sensor 134, linear guide 135, servo electric cylinder 136, caster 137-1, foot 137-2, force testing device 138, adapter 138-1, spherical bearing 138-2, product force sensor 138-3, displacement testing device 139, slider magnet 133-1, mounting accessories 139-1, slider guide 139-2. DETAILED DESCRIPTION

[0042] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0043] The purpose of the present invention is to provide a device and a method for using the performance test of a linear drive mechanism, aiming to accurately test a variety of performance indicators of the linear drive mechanism to ensure that its performance in actual applications meets the requirements.

[0044] Embodiment 1:

[0045] Figure 1 It is a schematic diagram of the structure of a device for testing the performance of a linear drive mechanism in an embodiment of the present invention.

[0046] like Figure 1 As shown, this embodiment provides a device 100 for linear drive mechanism performance testing, including: a control system 110 , a data acquisition system 120 and a motion platform 130 .

[0047] The control system 110 starts the linear drive mechanism performance test program of the control system by issuing control instructions, performs various performance tests on the linear drive mechanism 200, and stores, processes and displays the test data in real time.

[0048] Specifically, the control system 110 includes a test function module and a motor drive module. The motor drive module is composed of a product motor controller, a servo motor controller, an in-position signal receiver, etc., wherein the product motor controller and the servo motor controller respectively issue operation instructions and operation parameters to the motor of the linear drive mechanism 200 and the motor of the servo electric cylinder 136 to control the movement of the product motor and the servo motor; the in-position signal receiver can receive the operating position signal of the lead screw in the linear drive mechanism 200 and the lead screw in the servo electric cylinder 136. When the lead screw reaches the specified position, the in-position signal receiver feeds back the position signal to the product motor controller and the servo motor controller, and the motor controller performs subsequent motor control operations after receiving the signal.

[0049] The test function module can complete various performance tests of the linear drive mechanism 200; when performing various performance tests, the test function module can monitor the operating status of the product motor and servo motor, and the operating position of the screw in real time; after the completion of various performance tests, the test function module will process and display the collected test data, and can browse and export it.

[0050] More specifically, the test function module includes a plurality of test submodules, and the test submodules are used for various performance tests of the linear drive mechanism 200. In this embodiment, the test submodules include a linear drive mechanism motion accuracy test submodule, a free follow-up resistance test submodule, a power consumption test submodule, and a lower fulcrum mechanism deformation test submodule; each test submodule performs a test task by controlling the motor drive module; the test function module also includes an interface display submodule and a data processing submodule, in which each test submodule can be displayed and selected, and the product motor and servo motor status can be monitored in real time, the product lead screw and the lead screw position of the servo electric cylinder 136 can be displayed, and the performance test results can be displayed; the data processing submodule will process and analyze the data received by the data acquisition system 120.

[0051] The data acquisition system 120 acquires test data of the motion platform 130 in real time and feeds the test data back to the control system 110 .

[0052] Specifically, the data acquisition system 120 includes a signal acquisition module and a power supply module. The signal acquisition module includes an acquisition card, a hard disk, etc. During the test, the signal acquisition module collects test data such as force value, displacement and speed in real time, and feeds the test data back to the control system, and stores the data in the hard disk; the power supply module includes a product motor module, an equipment motor power supply module, a data acquisition card power supply module, etc. The power supply module provides power to the motor of the linear drive mechanism 200, the motor in the servo electric cylinder 136, and the data acquisition card to ensure that the product motor and the servo motor work normally and the data acquisition card collects data normally.

[0053] Based on the linear drive mechanism performance test program, the motion platform 130 can complete various performance tests of the linear drive mechanism and generate test data. The motion platform 130 includes a base plate 131-1, a bracket 131-2, a force sensor 132, a linear displacement sensor 133, a linear guide 135, a limit sensor 134, a servo electric cylinder 136, a caster 137-1, a foot 137-2, a force test device 138 and a displacement test device 139. The servo electric cylinder 136 and the linear guide 135 constitute the action end of the motion platform 130. Driven by the linear drive mechanism performance test program, the action end drives the lead screw of the linear drive mechanism to freely extend and retract, and at the same time loads the linear drive mechanism 200, and the size of the load is closed-loop controlled according to the real-time data of the force sensor 132.

[0054] Specifically, when the action end of the motion platform 130 drives the lead screw of the linear drive mechanism 200 to perform telescopic motion, the data acquisition system 120 collects data from the force sensor 132 in real time and feeds it back to the control system 110, and the control system 110 displays the follow-up resistance of the linear drive mechanism 200. When the linear drive mechanism 200, as the action end, drives the lead screw to perform telescopic motion, the slider magnet 133-1 of the linear displacement sensor moves accordingly, and the actual motion position of the linear drive mechanism 200 is obtained by converting the motion displacement data of the slider magnet 133-1.

[0055] More specifically, the force sensor 132, the linear displacement sensor 133, the linear guide 135, the limit sensor 134, the servo electric cylinder 136, the force testing device 138, the bracket 131-2 and the displacement testing device 139 are installed on the top of the base plate 131-1, and the casters 137-1 and the feet 137-2 are installed on the bottom of the base plate 131-1. The casters 137-1 are used to move the equipment 100, the feet 137-2 are used to support the base plate 131-1, and the bracket 131-2 is used to install the linear drive mechanism 200.

[0056] Figure 2 It is a schematic diagram of a force testing device for a linear drive mechanism performance testing device in an embodiment of the present invention.

[0057] like Figure 2 As shown, the force testing device 138 includes a product force sensor 138 - 3 , the force sensor 132 , an adapter 138 - 1 and a spherical bearing 138 - 2 .

[0058] There are two adapters 138 - 1, which are connected to the product force sensor 138 - 3, the force sensor 132 and the joint bearing 138 - 2 at the same time; the joint bearing 138 - 2 is connected to the lead screw in the servo electric cylinder 136, and the whole constitutes a force testing device.

[0059] When the servo electric cylinder 136 on the moving platform 130 acts as the action end to drive the lead screw of the linear drive mechanism 200 to perform telescopic movement, the data acquisition system 120 collects data from the force sensor 132 in real time and feeds it back to the control system 110 , and the control system 110 displays the follow-up resistance of the linear drive mechanism 200 .

[0060] When the servo electric cylinder 136 on the motion table 130 is used as a test load, the size of the load provided can be closed-loop based on the load resistance data collected in real time by the product force sensor 138-3 to control the load resistance data within the test requirement range.

[0061] Figure 3 It is a schematic diagram of a displacement measuring device of a linear drive mechanism performance testing device in an embodiment of the present invention.

[0062] like Figure 3 As shown, the displacement testing device 139 includes a linear displacement sensor 133, a linear drive mechanism resolver data acquisition card, mounting accessories 139-1 and a slider guide rail 139-2.

[0063] The linear drive mechanism resolver signal acquisition card is located in the data acquisition system 120, and can read the product's own displacement (theoretical position) based on the resolver data; the installation accessory 139-1 connects the slider magnet 133-1 to the adapter 138-1; when testing, the slider magnet 133-1 will be driven, and the slider magnet 133-1 will stop when it moves to the limit sensor 134 on the slider guide 139-2.

[0064] When the linear drive mechanism 200 acts as the action end driving screw to perform telescopic movement, the slider magnet 133-1 moves accordingly, the linear displacement sensor 133 collects the actual movement displacement of the linear drive mechanism 200, and the linear drive mechanism rotation signal acquisition card collects the rotation signal during the product movement process; the movement displacement data of the two are converted through the control system 110 to obtain the theoretical movement position and actual movement position of the linear drive mechanism 200 itself.

[0065] Before the performance test, the linear drive mechanism 200 is first assembled on the bottom plate 131 - 1 , and then the linear drive mechanism 200 and the force sensor 132 are assembled. The control system 110 is started to run the linear drive mechanism performance test program and issue a test instruction; the test data of the motion platform 130 is collected through the data acquisition system 120 and fed back to the control system 110.

[0066] Embodiment 2:

[0067] Figure 4 It is a test flow chart of a linear drive mechanism performance test device in an embodiment of the present invention.

[0068] like Figure 4 As shown, this embodiment provides a method for using a device for linear drive mechanism performance testing, using a device for linear drive mechanism performance testing in the above embodiment 1, including the following steps:

[0069] Step S1, connecting the linear drive mechanism 200 to the device 100, and inspecting and calibrating the device 100 and the laser tracker before testing.

[0070] Specifically, the linear drive mechanism 200 is assembled on the bracket 131-2, and then the product force sensor 138-3 on the linear drive mechanism 200 is assembled with the adapter 138-1, so that the product force sensor 138-3 is coaxial with the force sensor 132, and the force condition of the product or equipment is accurately measured.

[0071] Step S2, open the data acquisition system 120, and start the linear drive mechanism performance test program in the control system 110, after confirming that the data acquisition system 120 and the control system 110 are in normal working state, select the performance test task and set the parameters in the program interface.

[0072] Step S3, based on the performance test task selection, perform a performance test on the linear drive mechanism 200 to obtain test data.

[0073] Specifically, step S3 includes:

[0074] When the measurement accuracy test is selected, first let the linear drive mechanism 200 return to the zero position, then push the linear drive mechanism 200 to the starting test position, and then control the linear drive mechanism 200 to move to the end test position. During this process, read the displacement data recorded by the linear displacement sensor 133 and the linear drive mechanism 200 itself, and record the difference between the two as the measurement accuracy.

[0075] When the free follow-up resistance test is selected, the force sensor 132 is first reset to zero to ensure that the test result is accurate and reliable, and then the action end of the motion platform 130 is unloaded and a push or pull operation is performed at a constant speed, and the data of the force sensor 132 under the push or pull action when unloaded is recorded; then the action end of the motion platform 130 is connected to the linear drive mechanism 200, and the force sensor 132 is reset at the same time, so that the action end of the motion platform 130 drags the linear drive mechanism 200 to push or pull at the same constant speed, and the data of the force sensor 132 under the push or pull action when connected is recorded; the difference between the two is recorded as the free follow-up resistance.

[0076] When the power consumption test is selected, the action end of the motion platform 130 outputs a certain constant force as the load of the linear drive mechanism, drives the linear drive mechanism 200 to push or pull at a constant speed, and records the phase current, driver voltage and driver current during the movement.

[0077] When the deformation test of the lower fulcrum mechanism is selected, the motor current of the linear drive mechanism 200 is slowly increased through the device 100, while the linear drive mechanism 200 is kept in the starting test position, and the data of the force sensor 132 is read in real time; when the force data of the force sensor reaches 1500N±50N, the deformation of the lower fulcrum is measured using a laser tracker.

[0078] Step S4: interpreting the test result based on the test data.

[0079] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0080] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0081] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A device for testing the performance of a linear drive mechanism, characterized in that: Including control system, data acquisition system and motion platform; The control system starts the linear drive mechanism performance test program of the control system by issuing control instructions, performs various performance tests on the linear drive mechanism, and stores, processes and displays the test data in real time; The data acquisition system acquires the test data of the motion platform in real time and feeds the test data back to the control system; The motion platform completes various performance tests of the linear drive mechanism and generates test data based on the linear drive mechanism performance test program. The motion platform includes a base plate, a bracket, a force sensor, a linear displacement sensor, a linear guide, a limit sensor and a servo electric cylinder. The servo electric cylinder and the linear guide constitute the action end of the motion platform. Driven by the linear drive mechanism performance test program, the action end drives the lead screw of the linear drive mechanism to freely extend and retract, and loads the linear drive mechanism at the same time. The size of the load is closed-loop controlled according to the real-time data of the force sensor.

2. The device for linear drive mechanism performance testing according to claim 1, characterized in that: The control system includes a test function module and a motor drive module. The motor drive module includes a product motor controller, a servo motor controller and an in-position signal receiver. The product motor controller and the servo motor controller respectively issue operating instructions to the motor of the linear drive mechanism and the motor of the servo electric cylinder. The in-position signal receiver can receive the operating position signals of the lead screw in the linear drive mechanism and the lead screw in the servo electric cylinder. The test function module completes various performance tests of the linear drive mechanism.

3. The device for testing the performance of a linear drive mechanism according to claim 2, characterized in that: The test function module includes a plurality of test submodules, and the test submodules include a linear drive mechanism motion accuracy test submodule, a free follow-up resistance test submodule, a power consumption test submodule and a lower fulcrum mechanism deformation test submodule.

4. The device for testing the performance of a linear drive mechanism according to claim 1, characterized in that: The data acquisition system includes a signal acquisition module and a power supply module. During the test, the signal acquisition module collects force value, displacement and speed in real time and feeds back to the control system. The power supply module includes a product motor analog module, an equipment motor power supply module and a data acquisition card power supply module.

5. The device for testing the performance of a linear drive mechanism according to claim 1, characterized in that: When the action end of the motion platform drives the lead screw of the linear drive mechanism to perform telescopic motion, the data acquisition system collects data from the force sensor in real time and feeds back to the control system. The control system displays the follow-up resistance of the linear drive mechanism. When the linear drive mechanism, as the action end, drives the lead screw to perform telescopic motion, it drives the slider magnet of the linear displacement sensor to move accordingly. By converting the motion displacement data of the slider magnet, the actual motion position of the linear drive mechanism is obtained.

6. The device for linear drive mechanism performance testing according to claim 1, characterized in that: The sports platform also includes casters, feet, a force testing device and a displacement testing device; the force sensor, the linear displacement sensor, the linear guide rail, the limit sensor, the servo electric cylinder, the force testing device, the bracket and the displacement testing device are installed on the top of the base plate, the casters and the feet are installed at the bottom of the base plate, the casters are used to move the equipment, the feet are used to support the base plate, and the bracket is used to install the linear drive mechanism.

7. The device for testing the performance of a linear drive mechanism according to claim 6, characterized in that: The force testing device includes a product force sensor, a force sensor, an adapter and a spherical bearing. The adapter consists of two parts, which connect the product force sensor, the force sensor and the spherical bearing at the same time; the spherical bearing is connected to the lead screw in the servo electric cylinder.

8. The device for testing the performance of a linear drive mechanism according to claim 6, characterized in that: The displacement testing device includes a linear displacement sensor, a linear drive mechanism resolver data acquisition card, mounting accessories and a slider guide rail. The linear drive mechanism resolver signal acquisition card is located in the data acquisition system. The mounting accessories connect the slider magnet to the adapter. When testing, the slider magnet will be driven and stop when the slider magnet moves to the limit sensor on the slider guide rail.

9. A method for using a device for linear drive mechanism performance testing, using the device for linear drive mechanism performance testing according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step S1, connecting the linear drive mechanism to the device, and inspecting and calibrating the device and the laser tracker before testing; Step S2, turning on the data acquisition system and starting the linear drive mechanism performance test program in the control system, after confirming that the data acquisition system and the control system are in normal working state, selecting the performance test task and setting the parameters in the program interface; Step S3, based on the performance test task selection, performing a performance test of the linear drive mechanism to obtain test data; Step S4: interpreting the test result based on the test data.

10. A method for using a device for linear drive mechanism performance testing according to claim 9, characterized in that: The step S3 comprises: When the measurement accuracy test is selected, the linear drive mechanism is first returned to the zero position, then pushed to the starting test position, and then controlled to move to the end test position. During this process, the displacement data recorded by the linear displacement sensor and the linear drive mechanism itself are read, and the difference between the two is recorded as the measurement accuracy; When the free follow-up resistance test is selected, the force sensor is firstly cleared, and then the action end of the motion platform is unloaded and a push or pull operation is performed at a constant speed, and the data of the force sensor under the push or pull action when unloaded is recorded; then the action end of the motion platform is connected to the linear drive mechanism, and the force sensor is cleared at the same time, so that the action end of the motion platform drags the linear drive mechanism to push or pull at the same constant speed, and the data of the force sensor under the push or pull action when connected is recorded; the difference between the two is recorded as the free follow-up resistance; When the power consumption test is selected, the action end of the motion platform is made to output a preset constant force as the load of the linear drive mechanism, and the linear drive mechanism is driven to push or pull at a constant speed, and the phase current, driver voltage and driver current during the movement are recorded; When the deformation test of the lower fulcrum mechanism is selected, the motor current of the linear drive mechanism is slowly increased through the device, while the linear drive mechanism is kept in the starting test position, and the data of the force sensor is read in real time; when the force data of the force sensor reaches the required value, the deformation of the lower fulcrum is measured by a laser tracker.

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