Drop test device and method

Abstract

The invention belongs to the field of product drop testing, and particularly discloses a drop testing device and method.The drop testing device comprises a grabbing mechanism used for grabbing a product, the grabbing mechanism comprises a rotationally-arranged installation disc, a steel wire rope installed on the installation disc and a clamp installed on the steel wire rope, and the clamp is used for clamping the product; the mounting disc comprises a first disc part and a second disc part which are coaxially arranged, the outer diameter of the second disc part is smaller than that of the first disc part, a fixing position for fixing a steel wire rope is arranged on the end face of the side, facing the second disc part, of the first disc part, and the second disc part is used for winding and lifting the steel wire rope; a plurality of sets of pushing pieces are arranged on the first disc part in the circumferential direction of the first disc part, each pushing piece comprises a pushing block sliding in the axial direction of the first disc part, and the pushing blocks are used for pushing the steel wire rope wound on the second disc part out of the second disc part. By the adoption of the scheme, the problem that products or packages need to be manually placed on a bracket for operation in each time of testing can be solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of product drop test, and particularly relates to a drop test device and method. BACKGROUND

[0002] In the field of product reliability verification, drop test is one of the key test methods for evaluating the structural strength of products, the impact resistance of internal components, and the effectiveness of packaging protection. Especially for durability tests that simulate accidental drop situations during long-term use, it is required to perform repeated drops of the same product or batch sample dozens or even hundreds of times to accumulate damage and observe performance degradation. This poses a severe challenge to test efficiency.

[0003] Currently, product drop tests mainly use a test piece carrier that can move up and down quickly. The product or packaging is placed on the carrier, and after reaching the preset height, the product is released to drop onto a hard and flat horizontal surface to evaluate the impact resistance of the packaging and product. Each test requires manual placement of the product or packaging on the carrier, and the entire "test-recovery-replacement" cycle consumes a large amount of time in repetitive manual handling, placement, and clamping. The effective test time ratio is low, making it difficult to meet the cycle requirements of large-scale or high-frequency durability tests. Frequent manual operation not only requires dedicated personnel to be on duty, but also makes it easy for operators to become fatigued when handling heavy products, posing a risk to occupational health. SUMMARY

[0004] To address the deficiencies in the prior art, the present application provides a drop test device and method to solve the problem of manual placement of products or packaging on the carrier before each test.

[0005] According to an embodiment of the present application, the following technical solutions are adopted:

[0006] The drop test device includes a grabbing mechanism for grabbing the product, the grabbing mechanism including a rotatingly arranged mounting disc, a steel wire rope mounted on the mounting disc, and a clamp mounted on the steel wire rope, the clamp being used to clamp the product; the mounting disc includes coaxially arranged first and second disc portions, the outer diameter of the second disc portion being smaller than that of the first disc portion, and the first disc portion being provided with a fixing position for fixing the steel wire rope on the side end face thereof facing the second disc portion, the second disc portion being used to wind the lifting steel wire rope; the first disc portion is provided with a plurality of groups of pushers along the circumference thereof, the pushers being used to push the steel wire rope wound on the second disc portion out of the second disc portion.

[0007] Compared with the prior art, the present application has the following beneficial effects:

[0008] In this solution, after the product is clamped by a fixture, the mounting plate is rotated to wind up the steel wire rope, thereby lifting the product. Once the product is lifted to a designated height, multiple sets of pushers push the steel wire rope off the second disc, achieving an instantaneous release of the steel wire rope. The product then undergoes free fall to meet the testing requirements. After one test, the steel wire rope can be rewound to lift the product again, realizing the integration of the entire process of "product grabbing-lifting-release-recovery" into an automated closed loop.

[0009] Workers only need to perform an initial clamping once. After that, the installation plate can be rotated to automatically complete the winding, lifting, and release of the wire rope and its subsequent recovery and reset. This completely eliminates the tedious steps of manual intervention after each test in the traditional method, such as picking up, handling, and installing the product. This makes continuous and high-frequency durability drop tests possible, increasing testing efficiency by several times and significantly reducing labor costs and labor intensity.

[0010] In addition, since repeated clamping is not required, the initial clamping angle remains consistent in subsequent drop tests. By controlling the product's lifting height, the initial posture and position of the product can be kept consistent, allowing for more accurate, scientific, repeatable, and comparable durability test data, thus enhancing the professionalism and authority of the test.

[0011] Furthermore, the pushing member includes a push block that slides axially along the first disk portion and a limiting groove formed on the first disk portion, the limiting groove being used to allow the push block to be fully embedded therein and to limit the push block.

[0012] Furthermore, the gripping mechanism also includes a fixed limiting plate located below the mounting plate. The limiting plate has a strip-shaped hole for the steel wire rope to pass through, and the length of the strip-shaped hole is along the radial direction of the mounting plate.

[0013] Furthermore, a rotating shaft is fixed at the rotation center of the mounting plate, and a damping buffer is installed at the rotating shaft and / or the fixed position.

[0014] Furthermore, it also includes a testing mechanism located below the gripping mechanism, which includes a circumferentially surrounding limit fence and a base plate fixed to the bottom of the limit fence.

[0015] Furthermore, it also includes a control mechanism, which includes a height detection component for detecting the position height of the gripper of the grasping mechanism, an angle detection component for detecting the rotation angle of the mounting plate, and a controller. The height detection component and the angle detection component are both connected to the controller for signal transmission. The controller is used to receive the detection signals from the height detection component and the angle detection component and determine whether to report an error based on the detection signals.

[0016] Furthermore, the control mechanism also includes an appearance inspection component for scanning or photographing the product and a data processing module. The data processing module is used to store the data scanned or photographed by the appearance inspection component and to compare multiple data sets.

[0017] Furthermore, the control mechanism also includes a counter for counting the number of tests.

[0018] According to embodiments of the present invention, the present invention also employs the following technical solutions:

[0019] The drop test method, using a drop test apparatus, includes the following steps:

[0020] S1. Select the appropriate position of the product and the fixture connection according to the product's testing requirements;

[0021] S2. Rotate the mounting disc to wind up the wire rope to the second disc. The clamp will lift the product. Once the product has been lifted to the specified height, stop rotating the mounting disc.

[0022] S3. Check the position of the push block, the height of the product, and the winding state of the wire rope. If the check is qualified, proceed to step S4. If the check is unqualified, reverse the installation plate to make the product land and repeat step S2.

[0023] S4. Simultaneously slide multiple push blocks, which push the wire rope out from the second disc, and the product is released to make free fall motion;

[0024] Repeat steps S2-S4 until the number of durability tests is met.

[0025] Furthermore, before step S4, the product is scanned or photographed, and the data is stored. During each test, the scanned or photographed data is compared with the initial data of the product during the first test or the data of the previous test to determine the product damage status. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the drop test device according to an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the overall structure of the drop test device according to an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the gripping mechanism in the drop test device according to an embodiment of the present invention.

[0029] Figure 4 for Figure 3 Side view of the installation disk.

[0030] In the diagram: 1. Baffle; 2. Casters; 3. Test frame; 4. Base plate; 5. Limiting fence; 6. Mounting plate; 7. Motor; 8. Limiting plate; 9. Wire rope; 10. Strip hole; 11. Cylinder; 12. Push block; 13. First disc section; 14. Second disc section; 15. Rotating shaft. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings, and specific embodiments are given.

[0032] In a first aspect, embodiments of the present invention disclose a drop testing device, specifically including the following embodiments:

[0033] like Figure 1 , Figure 2 As shown, the drop test device includes a test frame 3, a gripping mechanism for grasping products, and a test mechanism located below the gripping mechanism. The test frame 3 may simply be a frame structure (see...). Figure 2 (as shown in the diagram), or a box structure can be formed by installing baffles 1 on all four sides, top, and bottom of the frame structure (see...). Figure 1 As shown in the diagram, the test frame 3 can be opened and closed as long as the baffle 1 on one side of the test frame 3 is hinged to the door panel. In this embodiment, taking the test frame 3 as a box structure as an example, the bottom of the test frame 3 is equipped with several universal wheels 2 with foot brakes, which are in the prior art, to facilitate the movement of the test frame 3. When it is necessary to install the product, the baffle 1 on the side of the test frame 3 is opened for installation. During testing, the baffle 1 is closed to maintain a closed testing environment.

[0034] The testing mechanism includes a circumferentially surrounding limit fence 5 and a base plate 4 fixed to the bottom of the limit fence 5. The base plate 4 is a hard, flat horizontal plate used to withstand the product's drop. The limit fence 5 limits the product's rebound and rolling after landing, preventing the product from rebounding and hitting other equipment structures.

[0035] Combination Figure 3As shown, the gripping mechanism includes a rotating mounting plate 6, a steel wire rope 9 mounted on the mounting plate 6, and a clamp (not shown) mounted on the steel wire rope 9. The clamp is used to clamp the product. Specifically, a rotating shaft 15 is fixed at the rotation center of the mounting plate 6. The rotating shaft 15 is rotatably connected to the test frame 3. A motor 7 is mounted on the test frame 3 to drive the rotating shaft 15. The output shaft of the motor 7 can be directly connected to the rotating shaft 15, or it can be connected through a reducer or other structure in the prior art, so that the motor 7 can drive the mounting plate 6 to rotate. The clamp and the lower end of the steel wire rope 9 are fixed together. The clamp can be a gripper from the prior art. The specific type of gripper can be selected according to different products. In actual design, the product can also be directly tied with the steel wire rope 9. The selection can be based on the product's own structure, as long as the steel wire rope 9 and the product can be stably connected together. For example, when the product has a suitable groove structure that can tie and hold the steel wire rope 9, then the clamp is not required.

[0036] The mounting plate 6 includes a first disc portion 13 and a second disc portion 14 arranged coaxially. The outer diameter of the second disc portion 14 is smaller than that of the first disc portion 13. The first disc portion 13 has a fixing position for fixing the steel wire rope 9 on one end face facing the second disc portion 14. In this embodiment, the fixing position is a mounting hole opened on the end face of the first disc portion 13. The steel wire rope 9 is fixed by knots or other limiting structures at both ends of the mounting hole.

[0037] The second disc portion 14 is used to wind the lifting wire rope 9. The first disc portion 13 has several sets of pushing members along its circumference. These pushing members are used to push the wire rope 9 wound on the second disc portion 14 out of the second disc portion 14. In this embodiment, the pushing member includes a push block 12 that slides axially along the first disc portion 13 and a limiting groove formed on the first disc portion 13. The limiting groove is used to allow the push block 12 to be fully embedded within it and to limit the movement of the push block 12. Figure 4 As shown, the pushing component also includes a cylinder 11 fixed on the first disc portion 13. The output shaft of the cylinder 11 extends through into the limiting groove and is fixed to the push block 12. When the push block 12 is fully embedded in the limiting groove, it will not obstruct the winding of the wire rope 9 on the second disc portion 14 (see...). Figure 4 (as shown in the diagram), when the cylinder 11 drives the pusher 12 to move to the right and extend out of the limiting groove (in the state shown in the diagram) Figure 4 (Taking the direction shown in the figure as an example), the limiting block can push the wire rope 9 to move axially along the second disc portion 14.

[0038] In practical use, after the product is clamped by the fixture, the motor 7 drives the mounting plate 6 to rotate, and the wire rope 9 is wound onto the second disc 14, lifting the product to a specified height. Then, the motor 7 is turned off. Simultaneously, multiple cylinders 11 are activated, driving the push block 12 to slide, pushing the wire rope 9 off the second disc 14, achieving an instantaneous release of the wire rope 9, allowing the product to fall freely to meet the testing requirements. After one test is completed, the wire rope 9 can be rewound and the product lifted again, repeating the above process.

[0039] In another embodiment of the invention, combined with Figure 3 As shown, the gripping mechanism also includes a fixed limiting plate 8, located below the mounting plate 6. Specifically, the limiting plate 8 is fixed to the test frame 3, and has a strip-shaped hole 10 for the steel wire rope 9 to pass through. The length of the strip-shaped hole 10 is along the radial direction of the mounting plate 6. On the one hand, the limiting plate 8 limits the movement of the steel wire rope 9, ensuring that the steel wire rope 9 can only move within the strip-shaped hole 10. This facilitates the winding of the steel wire rope 9 as the mounting plate 6 rotates, and ensures that the steel wire rope 9 will not shift when released or when it may spring back after release. On the other hand, the limiting plate 8 also protects the mounting plate 6, preventing the product from colliding with it during upward movement.

[0040] In another embodiment of the present invention, after the wire rope 9 is released from the second disc portion 14, the product falls downwards in free fall. The instantaneous tension on the wire rope 9 may cause the wire rope 9 to pull the mounting disc 6 to rotate or even cause damage. Therefore, in this embodiment, a damping buffer is installed at the rotating shaft 15 and / or the fixed position.

[0041] When a damping buffer is installed on the rotating shaft 15, specifically, a bearing is installed between the rotating shaft 15 and the test frame 3. The damping buffer is installed between the bearing housing and the test frame 3. The damping buffer is a hydraulic buffer from the prior art. When the rotating shaft 15 is subjected to the impact tension of the wire rope 9, it is transmitted to the inner ring of the bearing through the rotating shaft 15. The inner ring of the bearing transmits the force to the outer ring of the bearing through the rolling elements. The outer ring of the bearing transmits the force to the bearing housing. The bearing housing transmits the force to the hydraulic buffer. The hydraulic buffer absorbs the energy through its own compression or displacement. Finally, the residual force is transmitted to the test frame 3. Most of the impact energy is absorbed by the hydraulic buffer, thereby effectively preventing the impact tension from directly driving the rotating shaft 15 and the drive components connected to it (such as the motor 7 and the reducer) to rotate violently or be damaged, thus protecting the safety and lifespan of the core drive system.

[0042] When a damping buffer is installed at the fixed position, specifically, the damping buffer is installed between the end of the wire rope 9 and the first disc 13. The damping buffer is a polyurethane buffer from the prior art. When the wire rope 9 receives instantaneous tension, the tension first acts on the polyurethane buffer, forcing the high-damping polyurethane material inside it to undergo compression or shear deformation, converting most of the impact kinetic energy into heat energy and dissipating it, thereby reducing the instantaneous peak tension transmitted to the mounting disc 6 and subsequent drive systems such as the rotating shaft 15 and bearings.

[0043] In actual design, the damping buffer can be installed at the pivot 15 or the fixed position, or at both positions, depending on the actual situation.

[0044] In another embodiment of the invention, a control mechanism is also included. The control mechanism includes a height detection element for detecting the position height of the gripper of the grasping mechanism, an angle detection element for detecting the rotation angle of the mounting plate 6, and a controller. The controller can be a microcontroller (MCU), programmable logic controller (PLC), industrial computer (IPC), or a motion controller based on a PID algorithm, as is available in the prior art. Specifically, the height detection element is a laser displacement sensor or an ultrasonic ranging sensor mounted on the limit plate 8, and the angle detection element is a high-precision rotary encoder mounted on the rotating shaft 15 or the output shaft of the motor 7. Both the height detection element and the angle detection element are connected to the controller via a digital communication interface.

[0045] The controller is used to receive detection signals from height and angle detection devices and determine whether to report an error based on the detection signals. Specifically, when measuring height, taking a laser displacement sensor as an example, the laser displacement sensor is installed directly above the product, emits a detection signal to the product, and receives the reflected signal to calculate the distance between the product and the laser displacement sensor. The installation height of the laser displacement sensor is fixed, so the height to which the product is lifted can be calculated.

[0046] When measuring the angle, the rotation angle of the rotating shaft 15 is read in real time by a high-precision rotary encoder. Then, the winding length of the wire rope 9 is calculated based on the radius of the second disc 14 and the number of rotations. Since the total length of the wire rope 9 is fixed, the hoisting height of the wire rope 9 after winding a certain length can be calculated.

[0047] In this solution, the controller simultaneously receives detection signals from both the height and angle sensors and compares the differences between their data. If the difference is too large, it indicates potential problems such as wire rope 9 slippage, sensor malfunction, or mechanical abnormality, requiring shutdown for maintenance to improve the accuracy of product height detection. The controller is also signal-connected to the motor 7 that drives the mounting plate 6, enabling the controller to control the motor 7's start and stop. When the controller receives detection signals from the height and angle sensors and determines that the product is at the specified height, it can control the motor 7 to shut down.

[0048] In another embodiment of the present invention, the control mechanism further includes an appearance inspection component for scanning or photographing the product and a data processing module, wherein the data processing module is used to store the data scanned or photographed by the appearance inspection component and to compare multiple data.

[0049] Specifically, the appearance inspection component uses an existing industrial area array 3D scanner. Multiple scanners are mounted on the limiting fence 5, either circumferentially or vertically, to ensure that 3D point cloud data and 2D texture images of the product surface can be captured from different angles. In actual design, the scanner can also be directly mounted on the test rack 3, as long as it allows for product photography or scanning.

[0050] The data processing module is specifically designed as a damage intelligent analysis software platform running on a dedicated industrial computer or high-performance server. Its core architecture and workflow are as follows:

[0051] 1. Establish a test database and create an independent file for each product / test sequence. Using "test sequence" as the index, store the original 3D point cloud data, 2D images, and corresponding test parameters (drop height, number of drops, attitude) before and after each product drop, enabling version management, fast retrieval, and long-term archiving of data.

[0052] 2. The raw data acquired by the scanner is denoised, filtered, and normalized to a coordinate system. Then, an iterative nearest-point algorithm combined with a feature matching algorithm is used to spatially align the scan data after the Nth drop with the initial baseline model and the data from the (N-1)th drop to a precision of millimeters. The 3D distance field between the aligned models is calculated, and regions with deformation exceeding a set threshold (e.g., 0.1 mm) are automatically identified. The identified damaged regions are clustered and segmented, and the characteristic parameters of each damaged region are quantified, including: area, maximum depth, average depth, volume, and contour perimeter. Combined with 2D texture image analysis, surface damage such as scratches, cracks, and paint peeling is identified.

[0053] 3. Based on preset rules (such as depth and area) or machine learning models, damage is automatically classified (such as slight dents, severe deformation, and structural cracks), the new damage caused by this drop is calculated, and the cumulative damage map is updated to intuitively show the evolution of damage as the number of drops increases.

[0054] 4. Generate a comprehensive test report including 3D damage heat map, damage parameter table, damage trend curve, etc. You can also set alarm thresholds. When damage exceeding the safe range (such as through crack) is detected, an alarm signal will be automatically sent to the controller, and it is recommended to stop the test.

[0055] In practical use, the data processing module may not include all the functions mentioned above. Its basic function is to store multiple scan data and generate comparison documents. This data can then be used to perform comparisons for algorithm design or manually based on the scan data. The data processing module is connected to the controller. In the initial stage of product development, after scanning the appearance inspection parts, initial data is retained and stored in the data processing module as an initial baseline model. Subsequent scans are performed after each drop test for analysis.

[0056] In another embodiment of the present invention, the control mechanism further includes a counter for counting the number of tests. Specifically, the counter is a counting program built into the controller. The controller is signal-connected to the cylinder 11 for driving the push block 12 to slide. Each time the controller controls the cylinder 11 to perform an operation, the counting program is incremented by 1. Each time the wire rope 9 is released, a count is recorded, thereby determining the number of drop tests performed.

[0057] Secondly, embodiments of the present invention disclose a drop test method, specifically including the following embodiments:

[0058] A drop test method, using a drop test apparatus as described in any of the above embodiments, includes the following steps:

[0059] S1. Based on the product's testing requirements, select the appropriate position on the product and connect the fixture. In actual testing, the product's surfaces, edges, and corners all need to undergo cyclic durability drop tests. Therefore, the test area of ​​the product needs to face downwards. Taking the bottom surface of the product as an example, the fixture needs to be connected to the top of the product so that the bottom surface of the product faces downwards.

[0060] S2. Set the number of durability tests and the test height of the product. Then, the controller controls the motor 7 to start, driving the mounting plate 6 to rotate, winding the steel wire rope 9 onto the second disc 14. The clamp lifts the product. Based on the dual detection of the height and angle detectors, the precise height of the product is determined. When the product is lifted to the specified height, the controller controls the motor 7 to shut off, stopping the rotation of the mounting plate 6.

[0061] S3. The position of the push block 12, the height of the product, and the winding state of the wire rope 9 are detected. Specifically, this can be done manually by directly observing whether the push block 12 is fully embedded in the limiting groove and whether the wire rope 9 is neatly wound on the second disc 14. Alternatively, a camera can be installed around the first disc 13 to capture images for judgment. If a camera is installed, the camera and controller are connected, and the controller determines whether the push block 12 is fully embedded in the limiting groove and whether the wire rope 9 is neatly wound on the second disc 14 based on the camera's captured data. The height of the product is then determined again based on the detection signals from the height and angle detection components.

[0062] After all tests are completed, if the test is qualified, proceed to step S4; if the test is unqualified, reverse the installation plate 6 to allow the product to land, and repeat step S2.

[0063] S4. The controller controls the appearance inspection component to scan or photograph the product and retain the data. Specifically, the retained data is used as the initial benchmark model during the first product test. After the data is retained, the controller controls the cylinder 11 to start. Multiple cylinders 11 start synchronously and slide multiple push blocks 12 synchronously. The push blocks 12 push the steel wire rope 9 out of the second disc 14, and the product is released to perform free fall.

[0064] Repeat steps S2-S4 until the set number of durability tests is met. During each test, the data scanned or captured in step S4 is compared with the initial data from the first test of the product to determine the degree of product damage. In actual testing, it can also be compared with the scan data from the previous test of the product.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A drop testing device, characterized in that, The device includes a gripping mechanism for gripping products. The gripping mechanism includes a rotating mounting plate, a steel wire rope mounted on the mounting plate, and a clamp mounted on the steel wire rope. The clamp is used to clamp the product. The mounting plate includes a first disc portion and a second disc portion coaxially arranged. The outer diameter of the second disc portion is smaller than that of the first disc portion. The first disc portion has a fixing position for fixing the steel wire rope on one end face facing the second disc portion. The second disc portion is used to wind and lift the steel wire rope. The first disc portion has several sets of pushing members along its circumference. The pushing members are used to push the steel wire rope wound on the second disc portion out of the second disc portion.

2. The drop test device according to claim 1, characterized in that, The pusher includes a push block that slides axially along the first disk portion and a limiting groove formed on the first disk portion. The limiting groove is used to allow the push block to be fully embedded therein and to limit the push block.

3. The drop test device according to claim 1, characterized in that, The gripping mechanism also includes a fixed limiting plate located below the mounting plate. The limiting plate has a strip-shaped hole for the steel wire rope to pass through, and the length of the strip-shaped hole is along the radial direction of the mounting plate.

4. The drop test device according to claim 1, characterized in that, The rotation center of the mounting plate is fixed with a rotating shaft, and a damping buffer is installed at the rotating shaft and / or the fixed position.

5. The drop test device according to claim 1, characterized in that, It also includes a testing mechanism located below the gripping mechanism, which includes a circumferentially surrounding limit fence and a base plate fixed to the bottom of the limit fence.

6. The drop test apparatus according to claim 1, characterized in that, It also includes a control mechanism, which includes a height detection component for detecting the position height of the gripper of the grasping mechanism, an angle detection component for detecting the rotation angle of the mounting plate, and a controller. The height detection component and the angle detection component are both connected to the controller for signal transmission. The controller is used to receive the detection signals from the height detection component and the angle detection component and determine whether to report an error based on the detection signals.

7. The drop test apparatus according to claim 6, characterized in that, The control mechanism also includes an appearance inspection component for scanning or photographing the product and a data processing module. The data processing module is used to store the data scanned or photographed by the appearance inspection component and to compare multiple data sets.

8. The drop test apparatus according to claim 6, characterized in that, The control mechanism also includes a counter for counting the number of tests.

9. A drop test method, characterized in that, Using the drop test apparatus as described in any one of claims 1-8, the method includes the following steps: S1. Select the appropriate position of the product and the fixture connection according to the product's testing requirements; S2. Rotate the mounting disc to wind up the wire rope to the second disc. The clamp will lift the product. Once the product has been lifted to the specified height, stop rotating the mounting disc. S3. Check the position of the push block, the height of the product, and the winding state of the wire rope. If the check is qualified, proceed to step S4. If the check is unqualified, reverse the installation plate to make the product land and repeat step S2. S4. Simultaneously slide multiple push blocks, which push the wire rope out from the second disc, and the product is released to make free fall motion; Repeat steps S2-S4 until the number of durability tests is met.

10. The drop test method according to claim 9, characterized in that, Before step S4 is performed, the product is scanned or photographed and the data is stored. During each test, the scanned or photographed data is compared with the initial data of the product during the first test or the data of the previous test to determine the product damage status.

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