Sensor test fixture

Abstract

The utility model relates to the technical field of test fixtures, and discloses a sensor test fixture, which comprises a placing plate, two symmetrical moving seats arranged on the placing plate, a driving unit arranged on one side of the placing plate and used for driving the two moving seats to simultaneously move towards each other or away from each other, and two symmetrical moving columns inserted on one side of each moving seat, and a U-shaped groove in a U shape is formed in the moving seat, the moving columns are inserted into the two ends of the U-shaped groove, the U-shaped groove is filled with a plurality of balls, abutting plates are fixedly installed at the ends of the moving columns, and a main controller electrically connected with the driving unit is fixedly installed on one side of the placing plate. According to the utility model, the plurality of abutting plates are arranged, the two moving columns slide at the two ends of the U-shaped groove, the balls can roll in the U-shaped groove, and the two abutting plates can abut against different plane positions of the sensor, so that special-shaped sensors in different shapes can be clamped and fixed, and the clamping application range during sensor testing is expanded.

Description

Technical Field

[0001] This utility model relates to the field of test fixture technology, specifically a sensor test fixture. Background Technology

[0002] A sensor is a detection device that can sense the information being measured and transform the sensed information into an electrical signal or other required form of information output according to a certain rule, so as to meet the requirements of information transmission, processing, storage, display, recording and control. During the testing process, the position of the sensor usually needs to be simply fixed to ensure the accuracy and stability during subsequent use.

[0003] To facilitate sensor clamping during testing, existing technologies have made numerous improvements to sensor testing fixtures. For example, patent publication number CN220699403U discloses a sensor testing fixture including a base with a clamping assembly slidably mounted on top. The clamping assembly includes a left slider and a right slider, with their opposite outer sides elastically connected to the base via compression springs. Connecting rod one is welded to both sides of the left slider, and connecting rod two is welded to both sides of the right slider. Connecting rod one and connecting rod two slide alternately. A lever is welded to the end of each connecting rod one and connecting rod two, with the levers close to each other and separating the left and right sliders. By setting compression springs on the outer sides of the two sliders of the clamping assembly, and by welding alternately arranged connecting rods one and two to the left and right sliders respectively, convenient operation is achieved. The elasticity of the compression springs enables rapid slider reset. Compared to the bidirectional screw adjustment method in the prior art, the clamping fixture of this application changes the spacing faster and is more convenient to operate.

[0004] The aforementioned patents have significant beneficial effects, but in practical application, they still have the following shortcomings:

[0005] In reality, there are many types of sensors with different shapes, and some sensors have irregular packaging shapes. When using the test fixtures in the aforementioned comparative documents to perform clamping tests on different sensors, it is necessary to change the clamping blocks to be compatible with the sensor. The clamping blocks need to be customized according to the shape of the sensor, which reduces the applicability of the test fixtures. Therefore, there is an urgent need in the field to improve sensor test fixtures in order to solve the shortcomings of the existing technology. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a sensor testing fixture that improves the applicability of clamping during sensor testing.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sensor testing fixture, including a placement plate, on which two symmetrical movable seats are provided. A driving unit for driving the two movable seats to move simultaneously towards or away from each other is provided on one side of the placement plate. Two symmetrical movable columns are inserted into one side of the movable seats. A U-shaped groove is provided inside the movable seats. The movable columns are inserted into both ends of the U-shaped groove. The U-shaped groove is filled with a number of ball bearings. An abutment plate is fixedly installed at the end of the movable column. A main controller electrically connected to the driving unit is fixedly installed on one side of the placement plate.

[0008] Preferably, each set of movable seats includes a lower fixed plate and an upper fixed plate, which are fixedly installed by bolts, and U-shaped grooves are formed on the opposite sides of the lower fixed plate and the upper fixed plate.

[0009] Preferably, the drive unit includes a drive motor fixedly installed on one side of the placement plate, a sliding block fixedly installed on the lower part of the lower fixed plate, and two symmetrical sliding grooves adapted to the sliding blocks on the upper part of the placement plate. A drive screw with one end fixedly installed to the output end of the drive motor is rotatably connected between the two sliding grooves.

[0010] Preferably, a spring is provided between the abutment plate and the movable seat, and the spring is used to reset the abutment plate.

[0011] Preferably, the moving column is fitted with a locking ring for limiting the position, and the lower fixing plate and the upper fixing plate are provided with locking grooves that are adapted to the locking ring on opposite sides. The spring is fixedly installed between the locking ring and the abutment plate.

[0012] Preferably, a mounting plate is fixedly installed on one side of the lower fixed plate, and the mounting plate is fixedly installed to the sliding block by bolts.

[0013] Preferably, the side of the abutment plate away from the moving column is provided with an elastic pad, and the elastic pad is elastic.

[0014] To address the shortcomings of existing technologies, this utility model provides a sensor testing fixture that overcomes these deficiencies. The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, by setting several abutment plates, two moving columns slide at both ends of the U-shaped groove, and the ball can roll in the U-shaped groove. The two abutment plates can abut at different plane positions of the sensor, which can clamp and fix irregularly shaped sensors of different shapes, thereby improving the clamping applicability range during sensor testing.

[0016] 2. In this utility model, by setting an elastic spring, when the two moving seats move in opposite directions, the spring drives several abutment plates to reset, which facilitates the clamping and fixing of the sensor.

[0017] 3. In this utility model, the movable base includes a lower fixed plate and an upper fixed plate that are fixedly installed by bolts, which facilitates the installation or replacement of the components inside the movable base. At the same time, by moving the two movable bases towards or away from each other, sensors of different sizes within a certain range can be clamped, further improving the applicability of the fixture.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic cross-sectional view of the present invention.

[0022] Figure 3 This is a schematic diagram of the lower fixing plate in this utility model;

[0023] Figure 4 for Figure 2 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 for Figure 3 Enlarged structural diagram at point B.

[0025] In the diagram: 1. Placement plate; 2. Movable seat; 3. Drive unit; 4. Movable column; 5. U-shaped groove; 6. Ball bearing; 7. Lower fixed plate; 8. Upper fixed plate; 9. Drive motor; 10. Sliding block; 11. Sliding groove; 12. Drive screw; 13. Snap ring; 14. Snap groove; 15. Abutment plate; 16. Spring; 17. Mounting plate; 18. Main controller. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0027] Example 1

[0028] Please see Figures 1-5 A sensor testing fixture includes a placement plate 1 with two symmetrical movable seats 2 on it. A drive unit 3 is located on one side of the placement plate 1 to drive the two movable seats 2 to move simultaneously towards or away from each other. Two symmetrical movable posts 4 are inserted into one side of each movable seat 2. Each movable seat 2 has a U-shaped groove 5, with the movable posts 4 inserted into both ends of the U-shaped groove 5. The U-shaped groove 5 is filled with several ball bearings 6. An abutment plate 15 is fixedly installed at the end of each movable post 4. A main control unit electrically connected to the drive unit 3 is fixedly installed on one side of the placement plate 1. The device 18, each set of movable seats 2 includes a lower fixed plate 7 and an upper fixed plate 8, which are fixedly installed by bolts. A U-shaped groove 5 is opened on the opposite side of the lower fixed plate 7 and the upper fixed plate 8. The drive unit 3 includes a drive motor 9 fixedly installed on one side of the placement plate 1. A sliding block 10 is fixedly installed on the lower part of the lower fixed plate 7. Two symmetrical sliding grooves 11 adapted to the sliding block 10 are opened on the upper part of the placement plate 1. A drive screw 12 with one end fixedly installed to the output end of the drive motor 9 is rotatably connected between the two sliding grooves 11.

[0029] In this embodiment, the sensor is tested between two movable seats 2, with several abutment plates 15 positioned on opposite sides of the sensor. The drive motor 9 is activated via a button on the main controller 18. The output of the drive motor 9 rotates the drive screw 12. The threads of the drive screw 12 on the inner sides of the two sliding grooves 11 are symmetrical and opposite in direction. When the drive screw 12 rotates, it drives two sliding blocks 10 to move towards each other within the two sliding grooves 11. The two sliding blocks 10 then move the two movable seats 2 towards each other. Several abutment plates 15 abut against the sides of the sensor, and simultaneously, these abutment plates 15 move the movable column 4 within the U-shaped groove 5. The ball bearing 6 is used for compression. The ball bearing 6 moves within the U-shaped groove 5 to compress several other abutment plates 15, allowing the abutment plates 15 to simultaneously abut against different planar positions. This enables the clamping and fixing of irregularly shaped sensors, improving the applicability of clamping when testing sensors. After the sensor is clamped, it is tested, such as photoelectric response or pressure tests under different lighting conditions. After the test is completed, the main controller 18 controls the drive motor 9 to rotate in the opposite direction, driving the two moving seats 2 to move back and forth, thus removing the sensor. The moving seat 2 includes a lower fixed plate 7 and an upper fixed plate 8, which are fixed by bolts for easy installation or later replacement.

[0030] Example 2

[0031] Please see Figure 5This embodiment includes the above embodiment, and further includes a spring 16 between the abutment plate 15 and the movable seat 2. The spring 16 is used to reset the abutment plate 15. A locking ring 13 for limiting is sleeved on the side of the movable column 4. The lower fixing plate 7 and the upper fixing plate 8 are provided with locking grooves 14 adapted to the locking ring 13 on opposite sides. The spring 16 is fixedly installed between the locking ring 13 and the abutment plate 15. An mounting plate 17 is fixedly installed on one side of the lower fixing plate 7. The mounting plate 17 is fixedly installed to the sliding block 10 by bolts. An elastic pad is provided on the side of the abutment plate 15 away from the movable column 4. The elastic pad is elastic.

[0032] In this embodiment, the spring 16 is elastic. After the sensor test is completed, the spring 16 drives the abutment plate 15 to reset. During installation, the lower fixing plate 7 of the appropriate size is fixedly installed on the upper part of the sliding block 10 by bolts and mounting plate 17. The snap ring 13 is sleeved on the side of the moving column 4 and snaps into the snap groove 14 on the lower fixing plate 7. Several balls 6 are snapped into the U-shaped groove 5 on the lower fixing plate 7. The upper fixing plate 8 is installed on the upper part of the lower fixing plate 7 by bolts, which facilitates the installation of the whole device or the replacement of parts later. The elastic pad prevents damage to the sensor surface.

[0033] The aforementioned drive motor 9 can be purchased from the market. It is a mature technology that has been fully disclosed, so it will not be repeated in the specification. The drive motor 9 is equipped with a power connection line, and it is electrically connected to the external main controller 18 and the 220V phase voltage (or 380V line voltage) through the power connection line. The main controller 18 can be a conventional known device such as a computer that plays a control role.

[0034] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sensor test fixture comprising a placement plate (1), characterized in that, The placement plate (1) is provided with two symmetrical movable seats (2). On one side of the placement plate (1) is a drive unit (3) for driving the two movable seats (2) to move simultaneously towards each other or away from each other. Two symmetrical movable columns (4) are inserted into one side of the movable seats (2). The movable seats (2) are provided with a U-shaped groove (5). The movable columns (4) are inserted into both ends of the U-shaped groove (5). The U-shaped groove (5) is filled with several balls (6). An abutment plate (15) is fixedly installed at the end of the movable column (4). A main controller (18) electrically connected to the drive unit (3) is fixedly installed on one side of the placement plate (1).

2. A sensor test fixture according to claim 1, wherein, Each set of movable seats (2) includes a lower fixed plate (7) and an upper fixed plate (8), which are fixedly installed by bolts. U-shaped grooves (5) are opened on the opposite sides of the lower fixed plate (7) and the upper fixed plate (8).

3. A sensor test fixture according to claim 2, wherein, The drive unit (3) includes a drive motor (9) fixedly installed on one side of the placement plate (1), a sliding block (10) fixedly installed on the lower part of the lower fixed plate (7), and two symmetrical sliding grooves (11) adapted to the sliding block (10) on the upper part of the placement plate (1). A drive screw (12) with one end fixedly installed to the output end of the drive motor (9) is rotatably connected between the two sliding grooves (11).

4. The sensor test fixture of claim 1, wherein, A spring (16) is provided between the abutment plate (15) and the movable seat (2), and the spring (16) is used to reset the abutment plate (15).

5. A sensor test fixture according to claim 4, wherein, The movable column (4) is fitted with a locking ring (13) for limiting the position. The lower fixing plate (7) and the upper fixing plate (8) are respectively provided with locking grooves (14) that are adapted to the locking ring (13) on opposite sides. The spring (16) is fixedly installed between the locking ring (13) and the abutment plate (15).

6. The sensor test fixture of claim 3, wherein, A mounting plate (17) is fixedly installed on one side of the lower fixing plate (7), and the mounting plate (17) is fixedly installed to the sliding block (10) by bolts.

7. A sensor testing fixture according to claim 1, characterized in that, An elastic pad is provided on the side of the abutment plate (15) away from the moving column (4), and the elastic pad is elastic.

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