Test system with anti-seismic function for high-altitude drop test of product

Abstract

The utility model provides a test system with an anti-seismic function for a high-altitude drop test of a product. The test system comprises a data acquisition device, a test cable, a plurality of test sensors and a ground test board, when a high-altitude drop test is carried out, the data acquisition device is installed in a product. The data acquisition device comprises an anti-seismic case, data acquisition equipment and a damping assembly, the data acquisition equipment is mounted in the anti-seismic case, and a case body of the data acquisition equipment and the inner wall of the anti-seismic case are packaged in a glue filling manner; the damping assembly is arranged at the bottom of the anti-seismic case; the data acquisition device internally comprises a plurality of data acquisition circuit boards which are arranged in a stacked mode, and glue pouring processing is carried out among the data acquisition circuit boards. The device is good in anti-seismic effect, and the reliability of a test result is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of product drop test, and in particular relates to a test system for product high-altitude drop test with a shock-resistant function. Background Art

[0002] A certain product needs to undergo a high-altitude drop safety test before leaving the factory. The test process is to hoist a certain product equipped with the data acquisition device to be tested on a gantry crane, and connect the data acquisition device in the product to the ground test bench through cables. After the product falls freely from the specified height, it collides with the foundation and falls to the ground and rolls over. During this process, the data acquisition device encapsulated in the product will be subjected to the vibration shock generated when the product collides with the ground, and the vibration shock when the product overturns, etc., which will cause the internal components of the data acquisition device to become loose or even damaged, affecting the reliability of the data collected by the equipment, and even causing test failures, data loss or loss. In order to play a shock-absorbing and buffering role for the data acquisition device in the product after it falls, the traditional method is to lay felt or rubber pads on the ground, but the anti-seismic effect of this method is limited. After many experiments, it is found that data cannot be collected.

[0003] When collecting data online, the cable may be damaged due to the product falling or rolling, causing unexpected power outages or ground computer data storage failures, resulting in missing or even interrupted data collection, making the test results incomplete and the data reliability unable to be guaranteed. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the data acquisition equipment located in the product is easily damaged by the impact of the drop during the high-altitude drop test of a certain product, resulting in unreliable data collection data, and to provide a test system for the product high-altitude drop test with a shock-resistant function.

[0005] To achieve the above purpose, the technical solution provided by the utility model is:

[0006] A test system for a product high-altitude drop test with a seismic function, which is special in that it includes a data acquisition device, a test cable, a plurality of test sensors and a ground test bench;

[0007] When performing a high-altitude drop test, the data acquisition device is installed inside the product;

[0008] The data acquisition device comprises a seismic case, a data acquisition device and a shock absorbing component. The data acquisition device is installed in the seismic case, and a shock absorbing pad is laid between the data acquisition device and the inner wall of the seismic case; the shock absorbing component is arranged at the bottom of the seismic case;

[0009] The signal output line of the test sensor is laid on the solid-state memory of the data acquisition device, and is used to collect vibration impact and strain signals of the tested product and transmit them to the data acquisition device;

[0010] The data acquisition device is connected to the ground test bench via a test cable, and the received vibration impact and strain signals are uploaded to the ground test bench in real time to achieve data backup;

[0011] The data acquisition device comprises a plurality of data acquisition circuit boards arranged in a stacked manner, and the data acquisition circuit boards are packaged in a glue-filling manner.

[0012] Furthermore, the earthquake-resistant case is a rectangular box with openings at both ends, and the opening at the top is smaller than the size of the data acquisition device, and the bottom opening is larger than the size of the data acquisition device, so that the data acquisition device can be easily loaded into the earthquake-resistant case and cannot be removed;

[0013] The anti-seismic chassis is a high-strength aluminum alloy chassis, which is integrally formed by CNC machining.

[0014] Furthermore, the side wall of the earthquake-resistant case includes a base and a flange located on the bottom surface of the base, the flange is perpendicular to the base and extends toward the outside of the earthquake-resistant case; the base is provided with a weight-reducing hole;

[0015] The flange is provided with a plurality of mounting holes for fixing the anti-vibration chassis to the shock absorbing assembly located below the anti-vibration chassis.

[0016] Furthermore, the shock absorbing assembly includes a first support plate, a second support plate, a vibration isolation spring and shock absorbing cotton; the first support plate and the second support plate are arranged in parallel up and down to form a space for accommodating the vibration isolation spring and the shock absorbing cotton;

[0017] The shock-absorbing cotton is located in the middle of the shock-absorbing assembly. A cavity is provided in the shock-absorbing cotton. A plurality of vibration isolation springs are arranged in an array in the cavity. The vibration isolation springs are vertically fixed between the first support plate and the second support plate to achieve shock absorption in the vertical direction.

[0018] Furthermore, steel wire rope shock absorbers are provided between the first support plate and the second support plate and at both ends of the shock absorbing cotton.

[0019] Furthermore, a shock-absorbing pad is provided between the first support plate and the bottom of the earthquake-resistant chassis.

[0020] Furthermore, the edge of the first support plate is provided with a downwardly bent flange, so as to enhance the strength of the first support plate without increasing the size of the first support plate.

[0021] Furthermore, each data acquisition circuit board is fixed by screws in a multi-point fixing manner, and an anti-loosening structure is provided on the screws.

[0022] Furthermore, the joint of the test sensor is filled with glue to increase the strength of the connection.

[0023] Furthermore, the test cable is an armored cable.

[0024] The advantages of the utility model are:

[0025] 1. In the utility model, the data acquisition device is encapsulated in the shock-resistant chassis by glue filling, the circuit boards in the data acquisition device are arranged in layers and encapsulated by glue filling, and a shock-absorbing component is also arranged at the bottom of the shock-resistant chassis, so that in the high-altitude drop test, the vibration impact generated when the product collides with the ground and the impact force of the product overturning on the ground on the data acquisition device are greatly reduced, thereby improving the reliability of online data acquisition.

[0026] 2. In the utility model, each data acquisition circuit board is fixed by screws in a multi-point fixing manner, so as to avoid a cantilever beam state when the data acquisition circuit board is installed, thereby improving the seismic performance of the data acquisition equipment; in addition, a mechanical anti-loosening structure is provided on the screws to prevent the screws from loosening during the falling process, so that the data acquisition circuit board can be reliably fixed in the data acquisition equipment box.

[0027] 3. In the utility model, shock-absorbing cotton is arranged at the bottom of the shock-resistant chassis and a plurality of vibration isolation springs are arranged in an array inside the shock-absorbing cotton, so as to realize the shock absorption of the data acquisition equipment in the vertical direction; in addition, a wire rope shock absorber is arranged at both ends of the shock-absorbing cotton, so as to reduce the inertial force and vibration generated by the inertial shaking of the data acquisition equipment to a minimum when a collision occurs, so as to ensure the safety of the data acquisition equipment and the test cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the layout of the test system in the embodiment of the utility model, wherein the data acquisition device is located inside the product under test;

[0029] Figure 2 It is a schematic diagram of the three-dimensional installation of the data acquisition device, the chassis and the shock-absorbing component in the utility model;

[0030] Figure 3 yes Figure 2 The front view of the invention is shown in which the shock-absorbing cotton is removed to show the vibration isolation spring structure inside the shock-absorbing cotton;

[0031] Figure 4 yes Figure 2 Side view of.

[0032] Explanation of the reference numerals: 1-ground test bench, 2-test cable, 3-tested product, 4-gantry crane, 5-data acquisition equipment, 6-seismic chassis, 7-shock-absorbing assembly, 701-first support plate, 702-second support plate, 703-vibration isolation spring, 704-shock-absorbing cotton, 705-wire rope shock absorber, 8-shock-absorbing pad. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below. The embodiments are exemplary and intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0034] Reference Figure 1 , a test system for a product high-altitude drop test with a seismic function, comprising a data acquisition device, a test cable 2, a plurality of test sensors and a ground test bench 1; when performing a high-altitude drop test, the data acquisition device is installed inside the product under test. The data acquisition device comprises a seismic chassis 6, a data acquisition device 5 and a shock-absorbing assembly 7, the data acquisition device 5 is installed in the seismic chassis, and a shock-absorbing pad is laid between the data acquisition device and the inner wall of the seismic chassis. The shock-absorbing assembly 7 is fixed to the bottom of the seismic chassis 6; the signal output line of the test sensor is laid on the solid-state memory of the data acquisition device, which is used to collect the vibration impact and strain signals of the product under test and transmit them to the data acquisition device. The data acquisition device is connected to the ground test bench through a test cable, and the received vibration impact and strain signals are uploaded to the ground test bench in real time to realize data backup. The data acquisition device includes a plurality of data acquisition circuit boards arranged in a stacked manner, and the data acquisition circuit boards are glued.

[0035] Reference Figure 2 , the data acquisition device 5 is installed in the earthquake-resistant chassis 6, and a shock-absorbing pad is laid between the data acquisition device and the inner wall of the earthquake-resistant chassis. The earthquake-resistant chassis 6 is a rectangular box with openings at both ends, and the opening at the top is smaller than the size of the data acquisition device, and the opening at the bottom is larger than the size of the data acquisition device, so that the data acquisition device can be loaded into the earthquake-resistant chassis and cannot fall out. The earthquake-resistant chassis as a whole clamps the data acquisition device, which plays a good impact-resistant role. The earthquake-resistant chassis is a high-strength aluminum alloy chassis, which is integrally formed by CNC machining. The side wall of the earthquake-resistant chassis includes a base and a flange located on the bottom surface of the base, and the flange extends perpendicular to the base toward the outside of the chassis; the flange is provided with a plurality of mounting holes for fixing the earthquake-resistant chassis with the shock-absorbing assembly 7 located below it. The base of the side wall of the earthquake-resistant chassis is provided with a weight-reducing hole, and the weight-reducing hole can be a large rectangular through hole, or a plurality of small weight-reducing holes arranged in an array.

[0036] The data acquisition device 5 has a plurality of data acquisition circuit boards, and each data acquisition circuit board is arranged in a stacked manner. After the data acquisition device is placed in a seismic-resistant chassis, a high-strength shock-absorbing sealant is used to perform glue encapsulation between the data acquisition circuit boards, thereby enhancing the impact resistance of the data acquisition device and preventing damage to the data acquisition circuit boards during a fall. Furthermore, each data acquisition circuit board is fixed by screws in a multi-point fixing manner to avoid a cantilever beam state when the data acquisition circuit board is installed, thereby improving the seismic resistance of the data acquisition device. Specifically, a mechanical anti-loosening structure is provided on the screws used to fix the data acquisition circuit board, so that the data acquisition circuit board can be reliably fixed in the data acquisition device case to prevent the screws from loosening during a fall. In this embodiment, the mechanical anti-loosening structure uses a self-locking nut and a self-locking screw to prevent the screws from loosening.

[0037] Reference Figure 3 and Figure 4 , the shock absorbing assembly 7 is arranged at the bottom of the anti-seismic chassis 6, and the shock absorbing assembly includes a first support plate 701, a second support plate 702, a vibration isolation spring 703 and a shock absorbing cotton 704. The first support plate 701 and the second support plate 702 are arranged in parallel up and down to form a space for accommodating the vibration isolation spring 703 and the shock absorbing cotton 704. The shock absorbing cotton is located in the middle of the shock absorbing assembly, and a cavity is provided in the shock absorbing cotton. A plurality of vibration isolation springs 703 are arranged in an array in the cavity. The vibration isolation spring 703 is vertically arranged between the first support plate 701 and the second support plate 702, and the two ends are fixedly connected to the first support plate and the second support plate respectively to achieve shock absorption in the vertical direction. Optimally, a wire rope shock absorber 705 is also provided at the two ends of the shock absorbing cotton for auxiliary shock absorption. When a collision occurs, the data acquisition equipment is subjected to inertial shaking, and the inertial force and vibration are reduced to a minimum through the wire rope shock absorber to ensure the safety of the data acquisition equipment and the test cable. The wire rope shock absorber adopts the GSG-15 shock absorber. Optimally, a shock-absorbing pad 8 is provided between the first support plate 701 and the bottom of the chassis.

[0038] The edge of the first support plate 701 is provided with a downwardly bent flange, which can enhance the strength of the support plate without increasing the size of the first support plate.

[0039] The joint of the test sensor is filled with glue to increase the strength of the connection.

[0040] In order to ensure that the test cable will not be damaged during the test, the test cable in the utility model adopts armored cable.

[0041] like Figure 1As shown, it is a schematic diagram of the layout of the high-altitude drop test of a certain product of the utility model. The product 3 under test is suspended on the gantry tower crane 4. The height of the product under test from the ground is set to 7.8 meters according to the test requirements. The falling ground is a cement floor, and the cement floor is covered with steel plates. The data acquisition equipment is assembled with the earthquake-resistant chassis and shock-absorbing components and installed in the product under test. The data acquisition equipment is connected to the ground test bench 1 through the test cable 2. After multiple drop tests, it is checked and confirmed that the appearance of the data acquisition equipment is intact and undamaged, the wiring of the data acquisition circuit board in the equipment is intact, and the screws are not loose; the test data obtained by the ground test bench is complete and undamaged.

[0042] The above description is only a specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present utility model, and these modifications or substitutions should be included in the protection scope of the present utility model.

Claims

1. A product high-altitude drop test test system with earthquake resistance, characterized in that: Includes data acquisition device, test cables, multiple test sensors and ground test bench; When performing a high-altitude drop test, the data acquisition device is installed inside the product; The data acquisition device comprises a seismic chassis, a data acquisition device and a shock-absorbing assembly, wherein the data acquisition device is installed in the seismic chassis, and a shock-absorbing pad is laid between the data acquisition device and the inner wall of the seismic chassis; The shock absorbing assembly is arranged at the bottom of the shock resistant chassis; The signal output line of the test sensor is laid on the solid-state memory of the data acquisition device, and is used to collect vibration impact and strain signals of the tested product and transmit them to the data acquisition device; The data acquisition device is connected to the ground test bench via a test cable, and the received vibration impact and strain signals are uploaded to the ground test bench in real time to achieve data backup; The data acquisition device comprises a plurality of data acquisition circuit boards arranged in a stacked manner, and the data acquisition circuit boards are packaged in a glue-filling manner.

2. The product high-altitude drop test test system with earthquake resistance according to claim 1 is characterized in that: The earthquake-resistant case is a rectangular box with openings at both ends, and the opening at the top is smaller than the size of the data acquisition device, and the opening at the bottom is larger than the size of the data acquisition device, so that the data acquisition device can be easily loaded into the earthquake-resistant case and cannot be removed; The anti-seismic chassis is a high-strength aluminum alloy chassis, which is integrally formed by CNC machining.

3. The product high-altitude drop test test system with earthquake resistance according to claim 2 is characterized in that: The side wall of the earthquake-resistant case includes a base and a flange located on the bottom surface of the base, wherein the flange is perpendicular to the base and extends toward the outside of the earthquake-resistant case; a weight-reducing hole is provided on the base; The flange is provided with a plurality of mounting holes for fixing the anti-vibration chassis to the shock absorbing assembly located below the anti-vibration chassis.

4. The product high-altitude drop test test system with earthquake resistance according to claim 1 or 3, characterized in that: The shock absorbing assembly comprises a first support plate, a second support plate, a vibration isolation spring and shock absorbing cotton; the first support plate and the second support plate are arranged in parallel up and down to form a space for accommodating the vibration isolation spring and the shock absorbing cotton; The shock-absorbing cotton is located in the middle of the shock-absorbing assembly. A cavity is provided in the shock-absorbing cotton. A plurality of vibration isolation springs are arranged in an array in the cavity. The vibration isolation springs are vertically fixed between the first support plate and the second support plate to achieve shock absorption in the vertical direction.

5. The product high-altitude drop test test system with earthquake resistance according to claim 4 is characterized in that: Steel wire rope shock absorbers are arranged between the first support plate and the second support plate and at both ends of the shock absorbing cotton.

6. The product high-altitude drop test test system with earthquake resistance according to claim 5 is characterized by: A shock-absorbing pad is also provided between the first support plate and the bottom of the shock-resistant chassis.

7. The product high-altitude drop test test system with earthquake resistance according to claim 6 is characterized by: The edge of the first support plate is provided with a downwardly bent flange, which is used to enhance the strength of the first support plate without increasing the size of the first support plate.

8. The product high-altitude drop test test system with earthquake resistance according to claim 7 is characterized in that : Each data acquisition circuit board is fixed by screws in a multi-point fixing manner, and an anti-loosening structure is provided on the screws.

9. The product high-altitude drop test test system with earthquake resistance according to claim 1 or 8, characterized in that: The joint of the test sensor is filled with glue to increase the strength of the connection.

10. The product high-altitude drop test test system with earthquake resistance according to claim 9 is characterized in that: The test cable is an armored cable.

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