A relay movable component balance testing device based on voltage feedback

Abstract

The application relates to the technical field of testing devices, and particularly discloses a relay movable component balance testing device based on voltage feedback, which comprises a testing rack, a moving spring sheet adjusting device, a static spring sheet adjusting device, a collecting assembly, a driving mechanism and a control mechanism; the moving spring sheet adjusting device and the static spring sheet adjusting device are respectively used for adjusting the moving spring sheet and the static spring sheet of a relay; the control mechanism is used for judging whether the balance state of the relay movable component meets the standard according to the information collected by the collecting assembly; the balance testing device realizes balance testing through voltage feedback, has high testing precision, fast response speed, can automatically complete balance state judgment, and effectively improves the testing efficiency and reliability of the relay movable component.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and specifically to a relay moving part balance testing device based on voltage feedback. Background Technology

[0002] Relay testing primarily focuses on electrical performance aspects such as continuity, timing, and withstand voltage, or the final pull-in voltage value. However, it lacks direct testing and optimization methods for the dynamic balance of moving parts during operation. For precision relays, there is currently no efficient dynamic balance testing and optimization scheme that can provide real-time feedback on adjustment states. Traditional static pull-in voltage testing of relays cannot reflect the dynamic process.

[0003] The static or dynamic balance of a relay directly affects the stability, accuracy, and service life of its components. As a precision mechanical component, the force balance of the relay's actuator (armature, contact assembly, etc.) during operation is the core factor determining the reliability of the relay's operation. Dynamic imbalance of a relay can lead to problems such as component sluggish operation, increased contact bounce, uneven wear, increased noise, abnormal coil power consumption, and shortened mechanical life. It can even cause excessive vibration of the entire equipment, which is a manifestation of structural component balance defects.

[0004] Therefore, there is an urgent need for a device that can detect the balance state of structural components to meet the specific needs of balance testing for precision relay structural components. Summary of the Invention

[0005] The purpose of this invention is to provide a voltage feedback-based relay moving part balance testing device, which can quantitatively test the dynamic balance of the internal moving parts of the relay.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A voltage feedback-based relay moving part balance testing device includes: a test bench, a moving reed adjustment device, a stationary reed adjustment device, a data acquisition component, a drive mechanism, and a control mechanism.

[0008] The stationary reed adjustment device is configured to be horizontally opposite the moving reed adjustment device, and the moving reed adjustment device and the stationary reed adjustment device are respectively used to adjust the moving reed and the stationary reed of the relay.

[0009] The acquisition component is used to acquire information about the offset of the moving parts of the relay in real time.

[0010] The driving mechanism is used to drive the voltage acquisition component to connect to the relay pin.

[0011] The control mechanism is at least used to determine whether the balance state of the moving parts of the relay meets the standard based on the information collected by the acquisition component.

[0012] The moving spring adjustment device, the stationary spring adjustment device, the acquisition component, and the drive mechanism are all mounted on the test bench.

[0013] The voltage feedback-based relay movable component balancing test device provided in at least one embodiment of this disclosure further includes: a clamping mechanism disposed on the test bench, the clamping mechanism being used to clamp and fix the relay to be tested.

[0014] The voltage feedback-based relay movable component balancing test device provided in at least one embodiment of this disclosure further includes: a positioning mechanism disposed on the test bench, the positioning mechanism being used to position the relay to be tested.

[0015] In at least one embodiment of the present disclosure, a voltage feedback-based relay movable component balancing test device is provided, wherein the test bench has a support base.

[0016] Both the clamping mechanism and the positioning mechanism are mounted on the support base.

[0017] A testing station is provided on one side of the positioning mechanism.

[0018] The moving spring adjustment device and the stationary spring adjustment device are located on both sides of the test station, respectively.

[0019] In at least one embodiment of the present disclosure, a voltage feedback-based relay movable component balancing test device is provided, wherein the clamping mechanism includes a connecting seat, a pressure block, a servo motor, and a transmission belt.

[0020] The connecting seat is provided with a rotating shaft, and the rotating shaft is rotatably connected to the connecting seat.

[0021] The pressure block is fixedly mounted on the rotating shaft, and a driven wheel is fixedly mounted on one end of the rotating shaft.

[0022] Both the connecting seat and the servo motor are fixedly mounted on the support base. A drive wheel is fixedly mounted on the output shaft of the servo motor. The drive wheel and the driven wheel are driven by the transmission belt.

[0023] In at least one embodiment of the present disclosure, a voltage feedback-based relay movable component balancing test device is provided, wherein two positioning mechanisms are provided, and the test station is located between the two positioning mechanisms.

[0024] In at least one embodiment of the present disclosure, a voltage feedback-based relay movable component balancing test device is provided, wherein the positioning mechanism includes a second cylinder and a clamp.

[0025] The second cylinder is fixedly mounted on the support base, and the output end of the second cylinder is fixedly connected to the clamp.

[0026] In at least one embodiment of the present disclosure, a voltage feedback-based relay movable component balancing test device is provided, wherein a first connecting frame and a second connecting frame are provided on the test bench.

[0027] The moving spring adjustment device and the stationary spring adjustment device are fixedly connected to the first connecting frame and the second connecting frame, respectively.

[0028] In at least one embodiment of the voltage feedback-based relay movable component balancing test device provided in this disclosure, both the moving reed adjustment device and the stationary reed adjustment device include a linear motion platform, an adjustment motor, and an adjustment shaft.

[0029] The adjusting motor is fixedly mounted on the linear motion platform, and the linear motion platform is used to drive the adjusting motor to move linearly.

[0030] The adjustment shaft is fixedly mounted on the output shaft of the adjustment motor.

[0031] In at least one embodiment of the present disclosure, a voltage feedback-based relay movable part balance testing device is provided, wherein the acquisition component includes a voltage acquisition module and a contact acquisition module.

[0032] The support base is provided with a linear guide rail, and the voltage acquisition module is configured to be fixedly connected to the slider of the linear guide rail. The voltage acquisition module is slidably connected to the support base through the linear guide rail.

[0033] The contact acquisition module is located between the voltage acquisition module and the drive mechanism, and both the voltage acquisition module and the drive mechanism are fixedly connected to the contact acquisition module.

[0034] The support base is provided with a test hole for the voltage acquisition module to pass through, so that the voltage acquisition module can be connected to the relay pin.

[0035] The test perforation is located at the test station.

[0036] The voltage acquisition module is used to acquire the contact voltage signal when the movable part is offset in real time.

[0037] The contact acquisition module is used to monitor changes in contact force at the contact points and / or monitor the vibration amplitude of the moving parts of the relay during operation and / or detect the offset of the moving parts of the relay.

[0038] The beneficial effects of this invention are as follows: by using an optimized device that combines left and right adjustments, the precise position and overtravel of the contacts between the moving and stationary reeds of the relay can be coordinated and adjusted, ensuring the balance of the moving and stationary reeds of the relay and the equilibrium of the armature pull-in voltage parameters.

[0039] It significantly improves the reliability, lifespan, pass rate, and production efficiency of relays, meeting the requirements of mass automated production. During testing, the relay under test is clamped and fixed in place with a clamping device. Based on the balance test data, the pull-in voltage parameter is automatically increased or decreased. The spacing can be adjusted according to different specifications and models of relays, making it highly versatile and suitable for dynamic balancing and automatic adjustment of pull-in voltage parameters for various relay specifications and models. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a view of a relay movable component balance testing device based on voltage feedback according to the present invention.

[0042] Figure 2 This is a perspective view of a relay movable component balance testing device based on voltage feedback according to the present invention.

[0043] Figure 3 This is a partial structural schematic diagram of a voltage feedback-based relay movable component balance testing device according to the present invention.

[0044] Figure 4 This is a schematic diagram of the static reed adjustment device.

[0045] Figure 5 This is a schematic diagram of the acquisition component.

[0046] Figure 6 This is a three-dimensional view of the support base.

[0047] In the picture:

[0048] 10. Test bench; 11. Support base; 12. First connecting frame; 13. Second connecting frame; 14. Linear guide rail; 15. Test hole;

[0049] 20. Moving spring adjustment device; 21. Linear movement platform; 22. Adjustment motor; 23. Adjustment shaft;

[0050] 30. Static reed adjustment device;

[0051] 40. Secondary positioning mechanism; 41. First cylinder;

[0052] 50. Data Acquisition Components; 51. Voltage Acquisition Module; 52. Contact-Type Data Acquisition Module;

[0053] 60. Drive mechanism;

[0054] 70. Clamping mechanism; 71. Connecting seat; 72. Clamping block; 73. Servo motor; 74. Driving wheel; 75. Rotating shaft; 76. Driven wheel;

[0055] 80. Positioning mechanism; 81. Second cylinder. Detailed Implementation

[0056] The technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments.

[0057] This embodiment provides a voltage feedback-based relay moving part balance testing device, filling a gap in the existing technology. By automatically adjusting the pull-in voltage parameter and real-time detecting the balance state, it achieves a correlated test of the "pull-in voltage parameter - balance state." This not only determines whether the component is balanced but also accurately locates the optimal pull-in voltage parameter, combining testing and calibration functions to improve the assembly accuracy and operational stability of structural components. The device employs high-precision sensors and automated control logic, achieving high testing accuracy and efficiency. It can be widely applied in the production and testing of precision structural components such as relays that rely on pull-in voltage balance for operation.

[0058] like Figure 1 and 2 As shown, this embodiment provides a voltage feedback-based relay movable component balance testing device, including: a test bench 10, a moving spring adjustment device 20, a stationary spring adjustment device 30, a secondary positioning mechanism 40, a data acquisition component 50, a drive mechanism 60, a control mechanism (not shown), a clamping mechanism 70, and a positioning mechanism 80.

[0059] In this embodiment, the moving spring adjustment device 20, the stationary spring adjustment device 30, the secondary positioning mechanism 40, the acquisition component 50, the driving mechanism 60, the pressing mechanism 70, and the positioning mechanism 80 are all electrically connected to the control mechanism (not shown) and are controlled by the control mechanism (not shown).

[0060] In this embodiment, the test bench 10 has a support base 11, and the clamping mechanism 70, positioning mechanism 80, and secondary positioning mechanism 40 are all mounted on the support base 11. During use, the control mechanism determines whether the balance state of the relay's movable parts meets the standard based on the information collected by the acquisition component 50.

[0061] Specifically, the positioning mechanism 80 and the secondary positioning mechanism 40 are arranged opposite each other, and a test station is configured between the positioning mechanism 80 and the secondary positioning mechanism 40; the moving spring adjustment device 20 and the stationary spring adjustment device 30 are located on both sides of the test station.

[0062] In this embodiment, the stationary reed adjustment device 30 is configured to be horizontally opposite the moving reed adjustment device 20. The moving reed adjustment device 20 and the stationary reed adjustment device 30 are used to adjust the moving reed and the stationary reed of the relay, respectively.

[0063] The specific structure of the clamping mechanism 70 will be further disclosed below with reference to the accompanying drawings.

[0064] like Figure 2 and 3 As shown, the clamping mechanism 70 is used to clamp and fix the relay to be tested. The clamping mechanism 70 includes a connecting seat 71, a pressure block 72, a servo motor 73, and a drive belt (not shown).

[0065] Specifically, a rotating shaft 75 is provided on the connecting seat 71, and the rotating shaft 75 is rotatably connected to the connecting seat 71. The pressure block 72 is fixedly mounted on the rotating shaft 75 and rotates with the rotating shaft; a driven wheel 76 is fixedly mounted on one end of the rotating shaft 75.

[0066] Specifically, the connecting seat 71 and the servo motor 73 are both fixedly mounted on the support seat 11. The output shaft of the servo motor 73 is fixedly mounted with a drive wheel 74, and the drive wheel 74 and the driven wheel 76 are driven by a transmission belt.

[0067] The specific structure of the positioning mechanism 80 will be further disclosed below with reference to the accompanying drawings.

[0068] In this embodiment, the positioning mechanism 80 is used to position the relay to be tested.

[0069] like Figure 2 and 3 As shown, the positioning mechanism 80 includes a second cylinder 81 and a clamp (not shown).

[0070] The second cylinder 81 is fixedly mounted on the support base 11, and the output end of the second cylinder 81 is fixedly connected to the clamp.

[0071] The specific structure of the secondary positioning mechanism 40 will be further disclosed below with reference to the accompanying drawings.

[0072] In this embodiment, the secondary positioning mechanism 40 is used in conjunction with the positioning mechanism 80 to achieve secondary positioning of the relay, making the positioning of the relay more accurate and more secure.

[0073] like Figure 2 and 3As shown, the secondary positioning mechanism 40 includes a first cylinder 41 and a clamping component (not shown).

[0074] The first cylinder 41 is fixedly mounted on the support base 11, and the clamping component is fixedly connected to the output end of the first cylinder 41.

[0075] The specific structures of the moving reed adjustment device 20 and the stationary reed adjustment device 30 will be further disclosed below with reference to the accompanying drawings.

[0076] like Figure 1 , 2 As shown in Figure 4, the test bench 10 is provided with a first connecting frame 12 and a second connecting frame 13.

[0077] The moving spring adjustment device 20 and the stationary spring adjustment device 30 are fixedly connected to the first connecting frame 12 and the second connecting frame 13, respectively.

[0078] Both the moving reed adjustment device 20 and the stationary reed adjustment device 30 include a linear motion platform 21, an adjustment motor 22, and an adjustment shaft 23.

[0079] The adjusting motor 22 is fixedly mounted on the linear motion platform 21, which is used to drive the adjusting motor 22 to move linearly.

[0080] The adjusting shaft 23 is fixedly mounted on the output shaft of the adjusting motor 22.

[0081] For example, the linear motion platform 21 employs a servo linear guide.

[0082] The specific structure of the acquisition component 50 will be further disclosed below with reference to the accompanying drawings.

[0083] In this embodiment, the acquisition component 50 is used to acquire information about the displacement of the moving parts of the relay in real time. The drive mechanism 60 is used to drive the voltage acquisition component 50 to connect to the relay pins.

[0084] For example, the drive mechanism 60 employs a servo cylinder.

[0085] like Figure 1 , 5 As shown in Figure 6, the acquisition component 50 includes a voltage acquisition module 51 and a contact acquisition module 52.

[0086] A linear guide rail 14 is provided on the support base 11. The voltage acquisition module 51 is configured to be fixedly connected to the slider of the linear guide rail 14. The voltage acquisition module 51 is slidably connected to the support base 11 through the linear guide rail 14.

[0087] The contact acquisition module 52 is located between the voltage acquisition module 51 and the drive mechanism 60. Both the voltage acquisition module 51 and the drive mechanism 60 are fixedly connected to the contact acquisition module 52.

[0088] The support base 11 is provided with a test hole 15, which is used for the voltage acquisition module 51 to pass through so that the voltage acquisition module 51 can be connected to the relay pin. The test hole 15 is located at the test station.

[0089] The voltage acquisition module 51 is used to acquire the contact voltage signal when the movable part is offset in real time.

[0090] For example, the voltage acquisition module 51 has multiple conductive contacts, the distribution of which corresponds one-to-one with the pins of the relay, so that the pins of the relay can conduct electricity with the conductive contacts.

[0091] The contact acquisition module 52 is used to monitor changes in contact force at the contact points, monitor the vibration amplitude of the moving parts of the relay during operation, and detect the offset of the moving parts of the relay.

[0092] The following describes the operation of the voltage feedback-based relay movable part balance test device in the embodiments to further illustrate its principle.

[0093] In the balance test of moving parts of a relay, the judgment model of the "balance index" and "raw sensor data" is the core technical link to achieve accurate testing.

[0094] Balance index: Parameters used to quantify the balance state of the moving parts of a relay. The core indicators are offset Δd (the distance between the actual position of the moving part and the ideal balance position) and balance deviation rate η (the ratio of offset to the maximum allowable offset), which are the core basis for judging whether the moving parts are qualified.

[0095] Raw sensor data: Specifically refers to the contact voltage signal U collected in real time by the voltage acquisition module, that is, the voltage change value generated when the moving part of the relay makes contact with the contact point when it deviates. It is the basic data for calculating the balance index.

[0096] Based on the voltage feedback testing principle, the offset of the movable part is linearly correlated with the acquired voltage signal. The conversion relationship is determined through calibration experiments, and the core formula is as follows:

[0097] Basic conversion formula (relationship between offset and voltage): Δd = k × (U - )+b, Δd: Actual offset of the movable part (unit: mm); k: Calibration coefficient (unit: mm / V), determined experimentally, reflecting the proportional relationship between voltage change and offset; U: Voltage value acquired in real time by the voltage acquisition module (unit: V). : Reference voltage value (unit: V) when the movable part is in the ideal equilibrium position; b: Correction factor (unit: mm), used to eliminate fixed errors of the test system.

[0098] The formula for calculating the balance deviation rate is η=(Δd / d_max)×100%, where η is the balance deviation rate (%), which directly reflects the degree of imbalance of the moving parts; and d_max is the maximum allowable offset of the moving parts of the relay (unit: mm), which is specified by the product technical standards.

[0099] Based on the calculated balance index, a two-level judgment model is constructed to automatically determine the balance state of movable parts; the judgment condition is: η≤10% (or Δd≤0.1×d_max), and the judgment is: the balance state is good, the product is qualified, and it can enter the packaging process normally.

[0100] Judgment criteria: 10% < η ≤ 20% (or 0.1 × d_max < Δd ≤ 0.2 × d_max), judged as: slight imbalance, product needs adjustment, and the position of movable parts needs fine-tuning;

[0101] Judgment criteria: η>20% (or Δd>0.2×d_max), the product is judged as severely unbalanced and unqualified, requiring rework or scrapping.

[0102] It should be noted that the judgment threshold can be flexibly adjusted according to the technical requirements of different relay models. When the collected voltage signal U exceeds the normal range (such as U<0 or U>U_max), it is judged as a test abnormality, and the control mechanism will automatically alarm and prompt to check the connection status of the components or the status of the relay. The control mechanism can compare the converted balance index with the threshold in real time, directly output the judgment result of "qualified / to be adjusted / unqualified", and synchronize it to the display terminal.

[0103] One specific working method of the voltage feedback-based relay moving part balance testing device is as follows:

[0104] 1) In the initial state, the target relay is placed at the test station. The control mechanism clamps and fixes the target relay through the positioning mechanism and the secondary positioning mechanism, and the control mechanism uses the clamping mechanism to clamp and fix the relay. Then the control mechanism controls the drive mechanism to push the acquisition component to rise, so that the relay is connected to the acquisition component.

[0105] 2) A power-on testing mechanism is used to drive the relay multiple times at a specific frequency, simultaneously acquiring timing data of the contact pull-in voltage P(t), armature displacement D(t), and housing vibration V(t). The acquisition unit transmits the tested contact pull-in voltage, armature displacement, and housing vibration to the control mechanism. Based on the test results, the control mechanism controls the moving spring adjustment device to adjust the moving spring, thereby increasing or decreasing the relay pull-in voltage parameter. It also controls the stationary spring adjustment device to adjust the contact positions of the stationary and moving springs, thus achieving the effect of adjusting the pull-in voltage.

[0106] 3) The control mechanism calculates the balance indexes such as the symmetry index S and fluctuation energy E of the pull-in voltage curve, and compares and analyzes them with the preset threshold.

[0107] 4) If the actual index exceeds the preset threshold range, the control mechanism determines and adjusts the direction and value of the adjustment shaft (e.g., the corresponding adjustment shaft needs to be rotated backward or forward by X degrees); according to the contact position of the reed, the corresponding adjustment shaft is rotated backward or forward by Y degrees to ensure good contact between the contact points of the moving reed and the stationary reed.

[0108] 5) Repeat steps 1) to 5) until the balance index is qualified, then proceed to the packaging process.

[0109] Although embodiments of this application have been shown and described above, the scope of protection of this invention is not limited thereto. Any variations or substitutions that can be conceived without inventive effort should be covered within the scope of protection of this invention. Unless expressly stated otherwise, no element, action or instruction used herein should be construed as critical or necessary.

Claims

1. A relay moving part balance testing device based on voltage feedback, characterized in that, include: Test bench; Moving spring adjustment device; A stationary reed adjustment device is configured to be horizontally opposite to the movable reed adjustment device, wherein the movable reed adjustment device and the stationary reed adjustment device are respectively used to adjust the movable reed and the stationary reed of the relay; The data acquisition component is used to acquire information about the offset of the moving parts of the relay in real time. A drive mechanism is used to drive the acquisition component to connect to the relay pins; The control mechanism is at least used to determine whether the balance state of the moving parts of the relay meets the standard based on the information collected by the acquisition component. A clamping mechanism is configured on the test bench and is used to clamp and fix the relay to be tested. as well as A positioning mechanism is configured on the test bench, and the positioning mechanism is used to position the relay to be tested. The moving spring adjustment device, the stationary spring adjustment device, the data acquisition component, and the drive mechanism are all mounted on the test bench. The operating method of this voltage feedback-based relay moving part balance testing device includes the following steps: 1) In the initial state, the target relay is placed at the test station. The control mechanism clamps and fixes the target relay through the positioning mechanism, and the control mechanism also uses a clamping mechanism to clamp and fix the relay. Then, the control mechanism controls the drive mechanism to push the acquisition component up, so that the relay is connected to the acquisition component. 2) An energized testing mechanism is used to drive the relay to operate multiple times at a specific frequency, and the timing data of contact pull-in voltage P(t), armature displacement D(t), and housing vibration V(t) are collected simultaneously. The acquisition component transmits the tested contact pull-in voltage, armature displacement, and housing vibration timing data to the control mechanism. According to the timing data, the control mechanism controls the moving spring adjustment device to adjust the moving spring, thereby increasing or decreasing the relay pull-in voltage parameter, and controls the stationary spring adjustment device to adjust the contact position of the stationary spring and the moving spring, thereby achieving the effect of adjusting the pull-in voltage. 3) The control mechanism calculates the balance index of the pull-in voltage curve and compares it with the preset threshold for analysis; Among them, the balance indicators are the symmetry index S and the fluctuation energy E; 4) If the balance index exceeds the preset threshold range, the control mechanism will rotate the corresponding adjustment shaft backward or forward by Y degrees according to the contact position of the reed, so that the contact points of the moving reed and the stationary reed can make good contact. 5) Repeat steps 1) to 5) until the balance index is qualified, then proceed to the packaging process.

2. The relay movable component balance testing device based on voltage feedback according to claim 1, characterized in that, The test bench has a support base; Both the clamping mechanism and the positioning mechanism are mounted on the support base; A testing station is provided on one side of the positioning mechanism; The moving spring adjustment device and the stationary spring adjustment device are located on both sides of the test station, respectively.

3. The relay movable component balance testing device based on voltage feedback according to claim 2, characterized in that, The clamping mechanism includes a connecting seat, a pressure block, a servo motor, and a transmission belt; The connecting seat is provided with a rotating shaft, and the rotating shaft is rotatably connected to the connecting seat; The pressure block is fixedly mounted on the rotating shaft, and a driven wheel is fixedly mounted on one end of the rotating shaft; Both the connecting seat and the servo motor are fixedly mounted on the support base. A drive wheel is fixedly mounted on the output shaft of the servo motor. The drive wheel and the driven wheel are driven by the transmission belt.

4. The relay movable component balance testing device based on voltage feedback according to claim 3, characterized in that, There are two positioning mechanisms, and the test station is located between the two positioning mechanisms.

5. The relay movable component balance testing device based on voltage feedback according to claim 4, characterized in that, The positioning mechanism includes a second cylinder and a clamp; The second cylinder is fixedly mounted on the support base, and the output end of the second cylinder is fixedly connected to the clamp.

6. The relay movable component balance testing device based on voltage feedback according to claim 1, characterized in that, The test bench is equipped with a first connecting frame and a second connecting frame. The moving spring adjustment device and the stationary spring adjustment device are fixedly connected to the first connecting frame and the second connecting frame, respectively.

7. A relay movable component balance testing device based on voltage feedback according to claim 1 or 6, characterized in that, Both the moving reed adjustment device and the stationary reed adjustment device include a linear motion platform, an adjustment motor, and an adjustment shaft; The adjusting motor is fixedly mounted on the linear motion platform, and the linear motion platform is used to drive the adjusting motor to move linearly. The adjustment shaft is fixedly mounted on the output shaft of the adjustment motor.

8. The relay movable component balance testing device based on voltage feedback according to claim 5, characterized in that, The acquisition component includes a voltage acquisition module and a contact acquisition module; The support base is provided with a linear guide rail, and the voltage acquisition module is configured to be fixedly connected to the slider of the linear guide rail. The voltage acquisition module is slidably connected to the support base through the linear guide rail. The contact acquisition module is located between the voltage acquisition module and the drive mechanism, and both the voltage acquisition module and the drive mechanism are fixedly connected to the contact acquisition module. The support base is provided with a test hole for the voltage acquisition module to pass through, so that the voltage acquisition module can be connected to the relay pin. The test perforation is located at the test station; The voltage acquisition module is used to acquire the contact voltage signal when the movable part is offset in real time. The contact acquisition module is used to monitor changes in contact force at the contact points and / or monitor the vibration amplitude of the moving parts of the relay during operation and / or monitor the offset of the moving parts of the relay.

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