A free fall height calibration base

Abstract

The utility model relates to product performance test equipment technical field, concretely relates to a free falling height calibration base, including reinforcing bottom plate, the upper surface of reinforcing bottom plate is fixedly installed with reinforcing side frame, the inboard surface of reinforcing side frame's back side board body is fixedly installed with vertical guide rail, the front side of vertical guide rail's bottom plate body is fixedly installed with bottom calibration plate, the top of vertical guide rail is fixedly installed with servo motor, the output shaft end of servo motor is fixedly installed with precision screw rod, the sliding block is threadedly connected on precision screw rod, the front end part of sliding block is fixedly installed with horizontal rod, the bottom surface of horizontal rod is fixedly installed with laser ranging sensor, the front end part of horizontal rod is fixedly installed with U shape frame, both sides board body of U shape frame are all fixedly installed with electric push rod, the front side of reinforcing side frame still is fixedly installed with control host computer. The utility model can carry out height calibration operation, is favorable to reduce error, guarantees the accuracy of experiment.

Description

Technical Field

[0001] This utility model relates to the technical field of product performance testing equipment, and more specifically, to a free fall height calibration base. Background Technology

[0002] In industries such as electronics, mechanical parts, and packaging, drop testing is a crucial step in evaluating product quality and reliability. By simulating drops that products may encounter during actual use or transportation, the impact resistance of products is tested. In drop testing, the accuracy of the free fall height directly affects the validity and reliability of the test results.

[0003] Utility model patent CN216208265U discloses a free-fall drop test device, comprising: a triangular support with a base plate connected to it, the base plate having fastening grooves; a vertical rod connected to the triangular support; a horizontal rod horizontally positioned, its middle section connected to the end of the vertical rod; a sample holder connected to one end of the horizontal rod, and a pull rope for controlling the sample holder at the other end of the horizontal rod. This device facilitates free-fall testing of products without manual handling, effectively ensuring employee safety and improving test accuracy.

[0004] Patent CN119689490B discloses a laser ranging method and a laser ranging sensor. The method includes: acquiring a laser pulse signal emitted by a laser sensor and a received echo signal; acquiring the spectrum of the echo signal and extracting candidate peaks and their peak intervals; determining whether each candidate peak is a peak; converting the frequency domain signal within the peak interval of each peak to obtain a characteristic echo signal; obtaining the interference index of the characteristic echo signal corresponding to each peak; obtaining the local signal variation of each characteristic echo signal in each filtering window; combining the endpoint differences of the peak intervals between peaks to obtain the optimal filtering window; filtering the characteristic echo signal of each peak; and calculating the distance data based on the phase difference between the laser pulse signal and the filtered characteristic echo signal. This application aims to improve the ranging accuracy and efficiency of laser ranging sensors.

[0005] While the aforementioned technical solutions have their advantages, existing free-fall test devices have some shortcomings in height calibration methods. Some devices use simple rulers or scale markings to determine the drop height, relying on manual observation and adjustment. This method is highly susceptible to human error and has significant measurement errors, making it difficult to meet the requirements of high-precision drop resistance testing. Some automated devices, although equipped with electric lifting functions, lack effective calibration feedback mechanisms. After prolonged use, height deviations may occur due to mechanical wear and environmental factors, leading to inaccurate test results. Therefore, we propose a free-fall height calibration base. Utility Model Content

[0006] The purpose of this invention is to provide a free-fall height calibration base to address the deficiencies mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A free-fall height calibration base includes a reinforced base plate. A reinforced side frame with a rectangular cross-section is fixedly installed on the upper surface of the reinforced base plate. A vertically arranged vertical guide rail is fixedly installed on the inner side of the rear side plate of the reinforced side frame. A bottom calibration plate is fixedly installed on the front side of the bottom plate of the vertical guide rail. A servo motor is fixedly installed on the top of the vertical guide rail. A precision lead screw is fixedly installed at the end of the output shaft of the servo motor. A slider is threaded onto the precision lead screw. A horizontal rod is fixedly installed at the front end of the slider. A laser rangefinder sensor is fixedly installed on the bottom surface of the horizontal rod. The laser rangefinder sensor is located directly above the bottom calibration plate. A U-shaped frame is fixedly installed at the front end of the horizontal rod. Electric push rods for clamping test pieces are fixedly installed on both sides of the U-shaped frame. A control host is also fixedly installed on the front side of the reinforced side frame.

[0009] Preferably, the precision lead screw is located inside the vertical guide rail, and the slider is slidably connected to the vertical guide rail.

[0010] Preferably, the two electric push rods are positioned directly opposite each other, and a clamping plate is fixedly installed at the end of the telescopic shaft of each electric push rod.

[0011] Preferably, a plurality of support legs are fixedly installed at the bottom of the reinforced base plate, and a level is fixedly installed on the front side of the reinforced base plate;

[0012] This setup utilizes support legs for support and also allows for the use of a level to check for levelness.

[0013] Preferably, a side plate is fixedly installed on the side of the support leg, a stud is threadedly connected to the side plate, and a rubber pad is fixedly installed at the bottom end of the stud.

[0014] Preferably, the length of the stud is greater than the distance between the side plate and the bottom surface of the support leg, and a knob is fixedly installed on the top of the stud;

[0015] The above two settings allow for balancing, making them convenient to use.

[0016] Preferably, an outer transparent protective box is fixedly installed on the top surface of the reinforced side frame, which is fitted outside the vertical guide rail and the electric push rod, and the top surface of the outer transparent protective box is provided with wiring holes;

[0017] This feature allows for protective measures during drop tests using an outer transparent protective case, preventing test pieces from flying out and injuring personnel.

[0018] Preferably, the bottom front side of the outer transparent protective box is provided with a pick-up and put-down slot, and protective doors are hinged to the left and right side walls of the pick-up and put-down slot, and the protective doors are provided with door locks and door handles.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model achieves automated and precise calibration of free fall height by setting a servo motor to drive a precision lead screw, in conjunction with a slider, a horizontal bar, and a laser rangefinder. The servo motor precisely controls the rotation of the precision lead screw, driving the slider to move up and down to adjust the height. The laser rangefinder monitors the height in real time and, in conjunction with the bottom calibration plate, automatically adjusts to the set height. Compared with manual adjustment, this significantly reduces measurement errors, meets the requirements of high-precision drop resistance testing, and ensures the validity and reliability of the test results.

[0021] 2. This utility model achieves stable clamping of different test pieces and precise adjustment of the base level by installing electric push rods and clamping plates on both sides of the U-shaped frame, as well as setting adjustable support legs, studs, and a level. The electric push rods can flexibly adjust the clamping force and range to adapt to test pieces of various sizes. By rotating the knob at the top of the stud, the height of the support legs can be adjusted according to the feedback from the level, so that the base remains level and the accuracy of the test is not affected by the tilt of the base or the unstable clamping of the test piece, thus enhancing the versatility and stability of the equipment.

[0022] 3. This utility model achieves safe protection and convenient operation during the test process by setting up an outer transparent protective box, a pick-and-place slot, and a protective door. The outer transparent protective box surrounds the vertical guide rail, electric push rod, and other components and test pieces, preventing test pieces from flying and injuring people when they fall. The pick-and-place slot facilitates the placement and removal of test pieces, and the protective door with a lock and handle ensures both safety and ease of operation, providing a safe working environment for test personnel and making the test operation more convenient and efficient. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0025] Figure 3 This is a partial structural schematic diagram of the present invention;

[0026] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0027] The meanings of the labels in the diagram are as follows:

[0028] 1. Reinforced base plate; 10. Reinforced side frame; 11. Support leg; 12. Side plate; 13. Stud; 131. Rubber pad; 132. Knob; 14. Level; 15. Control unit;

[0029] 2. Vertical guide rail; 20. Bottom calibration plate; 21. Servo motor; 22. Precision lead screw; 23. Slider; 24. Horizontal bar; 241. Laser rangefinder sensor; 25. U-shaped frame; 26. Electric push rod; 27. Clamping plate;

[0030] 3. External transparent protective box; 30. Wiring hole; 31. Pick-up and drop-off slot; 32. Protective door. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-4This utility model provides a technical solution: a free-fall height calibration base, including a reinforced base plate 1, a reinforced side frame 10 with a rectangular ring cross-section fixedly installed on the upper surface of the reinforced base plate 1, a vertically arranged vertical guide rail 2 fixedly installed on the inner side of the rear side plate of the reinforced side frame 10, a bottom calibration plate 20 fixedly installed on the front side of the bottom plate of the vertical guide rail 2, a servo motor 21 fixedly installed on the top of the vertical guide rail 2, a precision lead screw 22 fixedly installed at the end of the output shaft of the servo motor 21, a slider 23 threadedly connected to the precision lead screw 22, a horizontal rod 24 fixedly installed at the front end of the slider 23, and a laser range sensor 241 fixedly installed on the bottom surface of the horizontal rod 24. The laser range sensor 241 is located at the bottom calibration plate. Above the calibration plate 20, the precision lead screw 22 is located inside the vertical guide rail 2, and the slider 23 is slidably connected to the vertical guide rail 2. This allows the servo motor 21 to drive the precision lead screw 22 to rotate, which in turn drives the slider 23, which is threadedly connected to the precision lead screw 22 and slides inside the vertical guide rail 2, to move up and down. This, in turn, drives the horizontal bar 24 and the laser range sensor 241 to rise and fall. The laser range sensor 241 works in conjunction with the bottom calibration plate 20 to perform height measurement. A control host 15 is also fixedly installed on the front side of the reinforced side frame 10. By using the laser range sensor 241 in conjunction with the control host 15, the automatic calibration of the free fall height is achieved, avoiding errors from manual observation and adjustment, improving calibration accuracy and efficiency, and ensuring the accuracy of the drop test height.

[0033] In this embodiment, the vertical guide rail 2 is provided with scale lines on its side. The horizontal rod 24 is horizontally indicated on the scale lines for visual observation. When the laser range sensor 241 performs range measurement, it takes the bottom calibration plate 20 as the starting position.

[0034] In this embodiment, a U-shaped frame 25 is fixedly installed at the front end of the horizontal rod 24. Electric push rods 26 for clamping the test piece are fixedly installed on the left and right side plates of the U-shaped frame 25. The positions of the two electric push rods 26 are directly opposite each other. A clamping plate 27 is fixedly installed at the end of the telescopic shaft of the electric push rod 26, so that the electric push rod 26 can flexibly adjust the position and clamping force of the clamping plate 27 according to the size and shape of the test piece, firmly and stably clamping test pieces of different specifications, preventing the test piece from shifting or falling off during the drop, ensuring the smooth conduct of the drop resistance test, and enhancing the versatility of the equipment.

[0035] like Figure 3 As shown, multiple support legs 11 are fixedly installed at the bottom of the reinforced base plate 1, and a level 14 is fixedly installed on the front side of the reinforced base plate 1, so that the support legs 11 provide stable support for the calibration base. The level 14 monitors the level status of the base in real time, and the operator can adjust the level of the base in time according to the data displayed by the level 14, so as to avoid height calibration errors caused by the tilt of the base, and lay the foundation for accurate calibration and reliable drop resistance test.

[0036] like Figure 3 and Figure 4 As shown, a side plate 12 is fixedly installed on the side of the support leg 11. A stud 13 is threaded onto the side plate 12. A rubber pad 131 is fixedly installed at the bottom of the stud 13. The length of the stud 13 is greater than the distance between the side plate 12 and the bottom surface of the support leg 11. A knob 132 is fixedly installed at the top of the stud 13, allowing the operator to adjust the height of the stud 13 by rotating the knob 132. This allows for quick leveling of the base in conjunction with the level 14. The rubber pad 131 increases the friction with the ground, preventing the base from sliding and improving the convenience of leveling and the stability of the base.

[0037] like Figure 2 As shown, an outer transparent protective box 3 is fixedly installed on the top surface of the reinforced side frame 10, which is fitted outside the vertical guide rail 2 and the electric push rod 26. The top surface of the outer transparent protective box 3 is provided with a wiring hole 30, which effectively prevents the test piece from splashing during the drop test and protects the safety of the test personnel. At the same time, the wiring hole 30 facilitates the connection and layout of internal equipment wiring without affecting the normal operation and function realization of the equipment.

[0038] like Figure 2 As shown, a pick-and-place slot 31 is provided on the front side of the bottom of the outer transparent protective box 3. Protective doors 32 are hinged to the left and right sides of the slot 31. The protective doors 32 are equipped with door locks and door handles, allowing operators to conveniently place and remove test pieces through the pick-and-place slot 31 by opening the protective doors 32. The door locks ensure the safety of the test and prevent accidental opening, while the door handles facilitate operation, improving the convenience and safety of the test operation.

[0039] It is worth noting that the control host 15 has its own data processing module and control system. The laser range sensor 241 emits a laser vertically downward. After the laser shines on the bottom calibration plate 20, it measures the vertical distance between the two in real time and transmits the data to the data processing module. The data processing module analyzes and processes the data collected by the sensor and compares it with the preset height value in the control host 15. If there is an error, the error signal is fed back to the control system. The control system automatically adjusts the operation of the servo motor 21 according to the error signal to calibrate the height, forming a closed-loop control to ensure the accuracy of the free fall height.

[0040] Finally, it should be noted that the control host 15, servo motor 21, laser rangefinder 241, electric push rod 26, corresponding control system and external power supply involved in this utility model are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components and adapted controllers and power supplies, are connected by wires. The specific connection method should refer to the working principle of this utility model. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.

[0041] When using the free fall height calibration base of this utility model, first place the base in the test site, and adjust the height of the stud 13 by rotating the knob 132 at the top of the stud 13 on the side of the support leg 11, according to the data displayed by the level 14 on the front side of the reinforced base plate 1, so that the reinforced base plate 1 is kept horizontal. The rubber pad 131 can prevent the base from sliding.

[0042] Then open the protective door 32 of the bottom pick-up slot 31 of the outer transparent protective box 3, place the test piece in the U-shaped frame 25, start the electric push rod 26, adjust the position and clamping force of the clamping plate 27 according to the size and shape of the test piece, and close the protective door 32 after firmly fixing the test piece.

[0043] Input the preset drop height value into the control host 15 operation interface. Servo motor 21 drives precision lead screw 22 to rotate, causing slider 23 to slide within vertical guide rail 2, raising and lowering horizontal bar 24 and laser range sensor 241. Laser range sensor 241 emits laser vertically downwards, which works with bottom calibration plate 20 to measure height. The data is transmitted to the data processing module of control host 15. After comparison with the preset value, if there is an error, the control system automatically adjusts servo motor 21 to calibrate the height. After confirming that the height calibration is correct, the test is started. Electric push rod 26 is released, and the test piece falls freely, completing the drop resistance test operation.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A free-fall height calibration base, comprising a reinforced base plate (1), characterized in that: A rectangular ring-shaped reinforced side frame (10) is fixedly installed on the upper surface of the reinforced base plate (1). A vertically arranged vertical guide rail (2) is fixedly installed on the inner side of the rear side plate of the reinforced side frame (10). A bottom calibration plate (20) is fixedly installed on the front side of the bottom plate of the vertical guide rail (2). A servo motor (21) is fixedly installed on the top of the vertical guide rail (2). A precision lead screw (22) is fixedly installed at the end of the output shaft of the servo motor (21). A slider (23) is threaded onto the precision lead screw (22). A horizontal rod (24) is fixedly installed at the front end of the slider (23). A laser range sensor (241) is fixedly installed on the bottom surface of the horizontal rod (24). The laser range sensor (241) is located directly above the bottom calibration plate (20). A U-shaped frame (25) is fixedly installed at the front end of the horizontal rod (24). Electric push rods (26) for clamping the test piece are fixedly installed on both the left and right sides of the U-shaped frame (25). A control host (15) is also fixedly installed on the front side of the reinforced side frame (10).

2. The free-fall height calibration base according to claim 1, characterized in that: The precision lead screw (22) is located inside the vertical guide rail (2), and the slider (23) is slidably connected to the vertical guide rail (2).

3. The free-fall height calibration base according to claim 1, characterized in that: The two electric push rods (26) are positioned opposite each other, and a clamping plate (27) is fixedly installed at the end of the telescopic shaft of the electric push rod (26).

4. The free-fall height calibration base according to claim 1, characterized in that: Multiple support legs (11) are fixedly installed at the bottom of the reinforced base plate (1), and a level (14) is fixedly installed on the front side of the reinforced base plate (1).

5. The free-fall height calibration base according to claim 4, characterized in that: A side plate (12) is fixedly installed on the side of the support leg (11), and a stud (13) is threadedly connected to the side plate (12). A rubber pad (131) is fixedly installed at the bottom of the stud (13).

6. The free-fall height calibration base according to claim 5, characterized in that: The length of the stud (13) is greater than the distance between the bottom surface of the side plate (12) and the support leg (11), and a knob (132) is fixedly installed on the top of the stud (13).

7. The free-fall height calibration base according to claim 1, characterized in that: An outer transparent protective box (3) is fixedly installed on the top surface of the reinforced side frame (10) and outside the vertical guide rail (2) and the electric push rod (26). A wiring hole (30) is provided on the top surface of the outer transparent protective box (3).

8. The free-fall height calibration base according to claim 7, characterized in that: The bottom front side of the outer transparent protective box (3) is provided with a pick-up and put-down slot (31). The left and right sides of the pick-up and put-down slot (31) are hinged with protective doors (32). The protective doors (32) are provided with door locks and door handles.

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