Acceleration sensor test tool based on linear slide motion

Abstract

The utility model relates to sensor detection frock technical field especially is an acceleration sensor test frock based on linear slide rail movement, including bearing main body, the bearing main body includes base body and platform body, the base body is connected between platform body fixedly, the upper end of platform body is provided with installation platform, linear guide rail, linear guide rail sets up on installation platform, and the sliding part of linear guide rail is matched and is docked with the abutment block, the utility model constructs linear motion platform through the cooperation of linear guide rail and spacing pole piece, has simulated the linear motion of slider, portal frame and other equipment under real working condition, has provided stable and accurate calculation's even acceleration linear motion input for sensor, has overcome the deficiency of standard vibration table in simulating long stroke, constant acceleration scene aspect, has avoided the error of centrifuge test because of the introduction of circular motion, makes the test environment more close to the actual application condition of sensor.

Description

Technical Field

[0001] This utility model relates to the field of sensor testing fixture technology, specifically an acceleration sensor testing fixture based on linear slide rail motion. Background Technology

[0002] Accelerometers, as crucial components for measuring the linear acceleration or vibration of moving objects, are widely used in automotive electronics, industrial automation, consumer electronics, and structural health monitoring, among other fields. Their accuracy and reliability directly impact the operational status and safety of the entire system.

[0003] Currently, the common method for testing and calibrating accelerometers mainly involves using a standard vibration table to generate vibration signals with known frequencies and amplitudes, fixing the sensor under test on the table for testing. Although this method is widely used, the equipment is expensive and it is mainly used for testing dynamic frequency response. It has limitations in simulating long-term, long-distance constant acceleration or uniformly accelerated linear motion scenarios.

[0004] Therefore, an accelerometer testing fixture based on linear slide rail motion is needed to improve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to provide an accelerometer testing fixture based on linear slide rail motion to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An accelerometer testing fixture based on linear slide rail motion includes:

[0008] The supporting body includes a base body and a platform body, the base body and the platform body are fixedly connected, and an installation platform is provided at the upper end of the platform body;

[0009] A linear guide rail is mounted on a mounting platform, and an abutment block is fitted onto the sliding part of the linear guide rail.

[0010] A pair of limiting rods are symmetrically arranged on both sides of the platform.

[0011] A test component, wherein the test component is slidably disposed between a pair of limiting rods, and the lower end of the test component is provided with a protruding end that engages with the abutment block;

[0012] A barrier is provided on one side of the platform, and a timing module is provided on the barrier.

[0013] As a preferred embodiment of this utility model, the test component includes a crossbar, a fixed seat is provided in the middle of the crossbar, a stud is provided at the upper end of the fixed seat, and an abutment plate is fixedly connected to the lower end of the stud.

[0014] As a preferred embodiment of this utility model, the lower inner end of the fixing base is provided with several rubber strips.

[0015] As a preferred embodiment of this utility model, the limiting rod includes a guide rod, and a protruding rod is fixedly connected to the side of the guide rod. The two ends of the guide rod are fixedly connected to the platform body through connecting columns, and the two ends of the crossbar are provided with slots that cooperate and slide with the protruding rod.

[0016] As a preferred embodiment of this utility model, the protruding end includes a connecting bottom end that is fixedly connected to the middle of the lower surface of the crossbar, and an abutment groove is provided on one side of the lower end of the connecting bottom end.

[0017] As a preferred embodiment of this utility model, the blocking component includes a limiting rod, and both ends of the limiting rod are provided with triggering components.

[0018] As a preferred embodiment of this utility model, the trigger includes a connecting cylinder, and a contact switch is provided inside the connecting cylinder.

[0019] As a preferred embodiment of this utility model, the linear guide rail has limit grooves on both sides, and the lower end of the sliding part is provided with a protrusion that slides in cooperation with the limit groove.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention constructs a linear motion platform through the collaboration of linear guide rails and limiting rods, simulating the linear motion of equipment such as sliders and gantry cranes under real working conditions. It provides the sensor with a stable and accurately calculable uniformly accelerated linear motion input, overcoming the shortcomings of standard vibration tables in simulating long-stroke and constant acceleration scenarios, avoiding errors introduced by circular motion in centrifuge testing, and making the testing environment closer to the actual application conditions of the sensor. Attached Figure Description

[0022] Figure 1 This is a first-view perspective perspective view of the present invention;

[0023] Figure 2 This is a second-view perspective perspective view of the present invention;

[0024] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 This utility model Figure 2Enlarged view of point B in the middle.

[0026] In the diagram: 1. Base body; 2. Platform; 3. Connecting column; 4. Guide rod; 5. Limiting rod; 6. Connecting cylinder; 7. Horizontal bar; 8. Fixing seat; 9. Stud; 10. Linear guide rail; 11. Limiting groove; 12. Slot; 13. Mounting platform; 14. Contact switch; 15. Protruding rod; 16. Rubber strip; 17. Abutment plate; 18. Connecting bottom end; 19. Abutment groove; 20. Abutment block. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below with reference to relevant embodiments. Several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0029] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Please see Figure 1-4 This utility model provides a technical solution:

[0032] For an example, please refer to... Figure 1 , 21, 2, and 3, 4, an accelerometer test fixture based on linear guide rail motion, comprising a robust support body, a linear guide rail 10 providing precise linear guidance, a test assembly for mounting the sensor, a pair of limiting rods to ensure smooth movement of the test assembly, and a stopper for precise timing.

[0033] The supporting body is the foundation of the entire tooling. It consists of a base body 1 and a platform 2 fixed on it. The base body 1 ensures that the entire tooling can be stably placed on a horizontal workbench. The upper end of the platform 2 is machined to form a high-precision mounting platform 13. The surface of the mounting platform 13 is precision ground to ensure the straightness of subsequent installation.

[0034] The linear guide rail 10 is mounted on the upper surface of the mounting platform 13 by screw fastening. The sliding part of the linear guide rail 10 can perform high-precision, low-friction reciprocating linear motion along the guide rail direction. In order to convert the linear motion of the sliding part into precise pushing of the test component, an abutment block 20 is fixedly installed at the upper end of the sliding part.

[0035] The test assembly is the part that directly supports the accelerometer sensor. It mainly consists of a crossbar 7, with a fixing seat 8 fixed to the middle of the crossbar 7 by bolts. A stud 9 is screwed into the center of the upper end of the fixing seat 8. By rotating the stud 9, the height of the abutment plate 17 connected to its lower end can be adjusted. The accelerometer sensor to be tested (not shown in the figure) is placed in the internal cavity of the fixing seat 8. By tightening the stud 9, the abutment plate 17 moves downward, firmly pressing the sensor into the fixing seat 8. In order to protect the sensor shell and enhance the shock resistance during the pressing process, several rubber strips 16 are also laid at the lower end of the interior of the fixing seat 8. Together, they form a soft buffer contact surface.

[0036] To ensure that the test component maintains a stable trajectory when pushed and to avoid deflection or jamming, a pair of limiting rods are symmetrically arranged on both sides of the platform 2. Each limiting rod includes a guide rod 4, which is fixedly connected to the platform 2 through connecting posts 3 at both ends. A protruding rod 15 is also fixed on the side of the guide rod 4.

[0037] Correspondingly, slots 12 matching the shape of the protruding rods 15 are provided at both ends of the crossbar 7. The crossbar 7 is set on the protruding rods 15 on both sides through the slots 12 at both ends, so that the entire test assembly can slide freely along the axial direction of the protruding rods 15, while avoiding displacement and rotation in other directions.

[0038] To achieve power transmission, a connecting bottom end 18 is fixed in the middle of the lower surface of the crossbar 7. An abutment groove 19 is provided on one side of the lower end of the connecting bottom end 18. When the sliding part of the linear guide rail 10 moves to one end of its travel, the abutment block 20 on it can be precisely embedded in the abutment groove 19. At this time, if the sliding part starts to move, the abutment block 20 will push the side wall of the abutment groove 19, thereby driving the entire test assembly to move together.

[0039] An obstruction is located on one side of the platform 2 to limit the movement of the test component and trigger timing. It includes a limit rod 5 that spans the movement path of the test component. At each end of the limit rod 5, there is a trigger. Each trigger includes a connecting cylinder 6. A contact switch 14, such as a micro switch or photoelectric switch, is installed inside the connecting cylinder 6. When the test component moves to the end position, it will touch the connecting cylinder 6, thereby activating the internal contact switch 14.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A testing fixture for an accelerometer based on linear slide rail motion, characterized in that, include: The supporting body includes a base body (1) and a platform (2), the base body (1) and the platform (2) are fixedly connected, and the upper end of the platform (2) is provided with an installation platform (13). Linear guide (10), the linear guide (10) is mounted on the mounting platform (13), and the sliding part of the linear guide (10) is fitted with an abutment block (20). A pair of limiting rods are symmetrically arranged on both sides of the platform (2); The test component is slidably disposed between a pair of the limiting rods, and the lower end of the test component is provided with a protruding end that engages with the abutment block (20); The barrier is located on one side of the platform (2) and a timing module is provided on the barrier.

2. The accelerometer testing fixture based on linear slide rail motion according to claim 1, characterized in that: The test assembly includes a crossbar (7), a fixing seat (8) is provided in the middle of the crossbar (7), and a stud (9) is provided at the upper end of the fixing seat (8), and an abutment plate (17) is fixedly connected to the lower end of the stud (9).

3. The accelerometer testing fixture based on linear slide rail motion according to claim 2, characterized in that: The lower interior of the fixing base (8) is provided with several rubber strips (16).

4. The accelerometer testing fixture based on linear slide rail motion according to claim 3, characterized in that: The limiting rod includes a guide rod (4), and a protruding rod (15) is fixedly connected to the side of the guide rod (4). The two ends of the guide rod (4) are fixedly connected to the platform (2) through the connecting column (3). The two ends of the crossbar (7) are provided with slots (12) that cooperate and slide with the protruding rod (15).

5. The accelerometer testing fixture based on linear slide rail motion according to claim 4, characterized in that: The protruding end includes a connecting bottom end (18) that is fixedly connected to the middle of the lower surface of the crossbar (7), and an abutment groove (19) is provided on one side of the lower end of the connecting bottom end (18).

6. The accelerometer testing fixture based on linear slide rail motion according to any one of claims 1-5, characterized in that: The blocking component includes a limiting rod (5), and both ends of the limiting rod (5) are provided with triggers.

7. The accelerometer testing fixture based on linear slide rail motion according to claim 6, characterized in that: The trigger includes a connecting cylinder (6), and a contact switch (14) is provided inside the connecting cylinder (6).

8. The accelerometer testing fixture based on linear slide rail motion according to claim 7, characterized in that: Limiting grooves (11) are provided on both sides of the linear guide (10), and a protrusion that slides in cooperation with the limiting groove (11) is provided at the lower end of the sliding part.

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