Pressure sensor testing device

Abstract

The invention belongs to the technical field of pressure sensors, and discloses a pressure sensor testing device which comprises a testing frame, clamping mechanisms and reset parts are arranged on the two sides of the interior of the testing frame, and through the cooperation of the clamping mechanisms, the reset parts and other structures, when a pressure sensor is placed in the testing frame, the pressure sensor can be clamped by the clamping mechanisms and the reset parts. The first clamping plate can push a first inclined block to move, meanwhile, the first inclined block can compress a telescopic spring, parallel movement of the first inclined block can push a moving rod to move downwards, the moving rod can drive a connecting rod to move downwards and extrude a compression spring while moving downwards, meanwhile, parallel movement of a second inclined block can also be pushed, and when the second inclined block moves, the telescopic spring can be compressed. When the pressure sensor is pressed, a second clamping plate is pushed to be connected with the bottom end of the pressure sensor, the bottom end of the pressure sensor is fixed, a positioning block is driven to move, a reset spring is extruded, and then a fixing cover is connected with a testing frame, so that a first inclined block can be limited.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure sensors, in particular to a pressure sensor testing device. Background Art

[0002] The pressure sensor testing device is a device that can simulate different pressure environments and accurately measure and calibrate the pressure sensor. It is mainly used to verify whether the output signal of the pressure sensor is linearly related to the pressure value it senses, and to evaluate the key performance indicators of the sensor such as sensitivity, stability, and accuracy.

[0003] When fixing the pressure sensor, the traditional test device basically relies on clamping in a single direction, and the fixing effect on both sides of the pressure sensor is limited. This fixing method is easily affected by external vibrations and other factors, resulting in large fluctuations in the test data, making it difficult to ensure the accuracy and stability of the test results. On the other hand, due to the lack of an effective reset and locking mechanism, the fixed pressure sensor is prone to slight displacement in the working state, thereby affecting the test accuracy. Therefore, a novel pressure sensor testing device is proposed to improve the deficiencies of the existing technology through multiple sets of linkage components and reset structures to achieve a more stable fixing effect. Summary of the invention

[0004] In order to solve the problems in the above background technology that it is difficult to ensure the accuracy and stability of the test results and lack of effective resetting and locking mechanisms, the present invention provides a pressure sensor testing device.

[0005] To achieve the above object, the present invention provides the following technical solution: a pressure sensor testing device, comprising a test frame, both sides of the test frame are provided with a clamping mechanism and a reset member, a fixing rod is installed on the bottom surface of the test frame, and a fixing member is installed inside the fixing rod;

[0006] The clamping mechanism comprises a first clamping plate, a first inclined block, a moving rod, a second inclined block and a second clamping plate, wherein the first clamping plate is fixedly connected to one end of the first inclined block, the other end of the first inclined block overlaps with the top of the moving rod, and the bottom end of the moving rod overlaps with one end of the second inclined block, and the second clamping plate is fixedly connected to the other end of the second inclined block;

[0007] The fixing member comprises an elastic column fixedly connected to the inside of the fixing rod, a buckle fixedly connected to the bottom of the elastic column and a clamping plate abutting against the buckle.

[0008] Preferably, there are two first clamping plates, and the two first clamping plates are symmetrically distributed inside the test frame, and the two first clamping plates are in an arc shape.

[0009] Preferably, the end of the first inclined block opposite to the moving rod is in an inclined shape, both ends of the moving rod are in an inclined shape, and the end of the second inclined block opposite to the moving rod is in an inclined shape.

[0010] Preferably, there are two second clamping plates, and the two second clamping plates are arc-shaped, and the inner walls are provided with threads. An inner cavity is opened inside the test frame, and the inner cavity is used to place the clamping mechanism and the reset member.

[0011] Preferably, a connecting rod is fixedly connected to one side of the movable rod, a compression spring is fixedly connected to the bottom end of the connecting rod, the connecting rod is elastically connected to a limit block through the compression spring, and the limit block is connected to the inner wall of the test frame, a protruding block is provided on one side of the connecting rod, and the connecting rod can be slidably connected to the inner cavity of the test frame through the protruding block.

[0012] Preferably, the reset member includes a telescopic spring fixedly connected to the first inclined block, a positioning block fixedly connected to the bottom surface of the second inclined block, a reset spring fixedly connected to one side of the positioning block, and a limiting block fixedly connected to one end of the reset spring.

[0013] Preferably, one end of the telescopic spring is connected to the inner wall of the test frame, the first inclined block compresses the telescopic spring when moving, the positioning block is slidably connected to the test frame, and the limiting block is fixedly connected to the test frame.

[0014] Preferably, the two first clamping plates can be spliced ​​into a circle, and the radius of the circle formed by the two first clamping plates is smaller than the radius of the top end of the pressure sensor, and the radius of the two second clamping plates is larger than the radius of the bottom end of the pressure sensor.

[0015] Preferably, the interior of the card plate is rotatably connected to a rotating shaft, the rotating shaft is fixedly connected to the test frame, the top of the card plate is fixedly connected to a toggle block, and one side of the card plate is fixedly connected to a compression spring.

[0016] Preferably, the clamping plate, the rotating shaft and the compression spring are all located inside the top end of the test frame, and a fixing cover is clamped on the top surface of the test frame, and the fixing cover is used to limit the first inclined block.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention cooperates with structures such as a clamping mechanism and a reset piece, so that when the pressure sensor is placed inside the test frame, the first clamping plate will push the first inclined block to move, and at the same time, the first inclined block will compress the telescopic spring. The parallel movement of the first inclined block will push the moving rod to move downward, and the moving rod will drive the connecting rod to move downward and squeeze the compression spring while moving downward, and at the same time, it will also push the parallel movement of the second inclined block. When the second inclined block moves, it will push the second clamping plate to connect with the bottom end of the pressure sensor and fix the bottom end of the pressure sensor, and will also drive the positioning block to move and squeeze the reset spring. Then, the fixing cover is connected to the test frame, and the first inclined block can be tested. An inclined block is used for limiting, so that the cooperation of the first clamping plate and the second clamping plate can fix the pressure sensor. The first clamping plate pushes the first inclined block, and the first inclined block compresses the telescopic spring through a series of actions, and the subsequent moving rod, the second inclined block and other components are linked in sequence, and finally the first clamping plate and the second clamping plate can cooperate and fix the upper and lower ends of the pressure sensor. This multi-component collaborative working mode can tightly clamp the pressure sensor from different directions, so that it can maintain a stable position in the test frame, and avoid loosening and displacement due to external interference, vibration or the force generated by its own work during the test process, thereby ensuring the accuracy and reliability of the test data.

[0019] The present invention connects the bottom end of one test frame with the top of another test frame through the setting of the fixing piece, and pushes the elastic column downward. After the elastic column is subjected to force, it will drive the buckle to move downward. During the movement, the buckle will gradually move out of the interior of the fixing rod and enter the interior of the test frame. When the buckle continues to move until it contacts the card plate, since the card plate is connected to the test frame through the rotating shaft, the rotating shaft will rotate at this time, so that the buckle and the card plate can be clamped together. After that, the compression spring sheet fixedly connected to one side of the elastic column and the card plate will respectively drive the buckle and the card plate to perform reset movement by virtue of their own elasticity. In this way, the clamping force between the buckle and the card plate is further strengthened, thereby achieving a stable connection between the two test frames, so that corresponding tests can be carried out on multiple pressure sensors. By connecting the bottom end of one test frame with the top of another test frame, the number of test frames can be flexibly increased according to actual needs, so that multiple pressure sensors can be tested at the same time, without the need to test the pressure sensors one by one, which greatly improves the overall test efficiency. Especially when a large number of pressure sensors need to be tested, the test cycle can be effectively shortened and relevant test data of all sensors can be obtained more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the disassembly of the clamping mechanism and the reset member of the present invention;

[0022] Figure 3 It is a schematic diagram of the matching relationship between the clamping mechanism and the reset member of the present invention;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention;

[0024] Figure 5 It is a cutting schematic diagram of the present invention;

[0025] Figure 6 It is a schematic diagram of the disassembly of the clamping mechanism of the present invention.

[0026] In the figure: 1. test frame; 2. clamping mechanism; 21. first clamping plate; 22. first inclined block; 23. moving rod; 231. connecting rod; 232. compression spring; 233. limit block; 24. second inclined block; 25. second clamping plate; 3. reset member; 31. telescopic spring; 32. positioning block; 33. reset spring; 34. limit block; 4. fixing member; 41. elastic column; 42. buckle; 43. clamping plate; 431. rotating shaft; 432. compression spring; 5. fixing rod; 6. fixing cover. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 6 As shown, the present invention provides a pressure sensor testing device, including a test frame 1, a clamping mechanism 2 and a reset member 3 are arranged on both sides of the test frame 1, a fixing rod 5 is installed on the bottom surface of the test frame 1, and a fixing member 4 is installed inside the fixing rod 5;

[0029] The clamping mechanism 2 includes a first clamping plate 21, a first inclined block 22, a moving rod 23, a second inclined block 24 and a second clamping plate 25. The first clamping plate 21 is fixedly connected to one end of the first inclined block 22. The other end of the first inclined block 22 overlaps the top of the moving rod 23, and the bottom end of the moving rod 23 overlaps one end of the second inclined block 24. The second clamping plate 25 is fixedly connected to the other end of the second inclined block 24.

[0030] The fixing member 4 includes an elastic column 41 fixedly connected to the inside of the fixing rod 5 , a buckle 42 fixedly connected to the bottom of the elastic column 41 , and a clamping plate 43 abutting against the buckle 42 .

[0031] The above scheme is adopted: there are two first clamping plates 21 which are symmetrically distributed and arc-shaped and can be spliced ​​into a circle. Its main function is to align and clamp the pressure sensor from the top end to prevent the pressure sensor from being displaced in the vertical direction during the test and ensure the stability of the test. By setting the cooperation of the clamping mechanism 2 and the reset member 3 and other structures, when the pressure sensor is placed inside the test frame 1, the first clamping plate 21 will push the first inclined block 22 to move. At the same time, the first inclined block 22 will compress the telescopic spring 31. The parallel movement of the first inclined block 22 will push the moving rod 23 to move downward. When the moving rod 23 moves downward, it will drive the connecting rod 231 to move downward and squeeze the compression spring 232. At the same time, it will also push the parallel movement of the second inclined block 24. When the second inclined block 24 moves, it will push the second clamping plate to connect with the bottom end of the pressure sensor and the bottom end of the pressure sensor The first clamping plate 21 and the second clamping plate 22 are used to fix the pressure sensor, and the first clamping plate 21 and the second clamping plate are used to fix the pressure sensor. The first clamping plate 21 pushes the first clamping plate 22, and the first clamping plate 22 compresses the telescopic spring 31. The subsequent moving rod 23, the second clamping plate 24 and other components are linked in sequence, and finally the first clamping plate 21 and the second clamping plate are used to fix the upper and lower ends of the pressure sensor. This multi-component collaborative working mode can tightly clamp the pressure sensor from different directions, so that it can maintain a stable position in the test frame 1, and avoid loosening and displacement due to external interference, vibration or the force generated by its own work during the test process, thereby ensuring the accuracy and reliability of the test data.

[0032] like Figures 1 to 6 As shown, there are two first clamping plates 21, and the two first clamping plates 21 are symmetrically distributed inside the test frame 1, the two first clamping plates 21 are arc-shaped, the end of the first inclined block 22 opposite to the moving rod 23 is in the shape of an inclined plane, both ends of the moving rod 23 are in the shape of an inclined plane, the end of the second inclined block 24 opposite to the moving rod 23 is in the shape of an inclined plane, the number of the second clamping plates 25 is two, and the two second clamping plates 25 are arc-shaped, the inner wall is provided with threads, an inner cavity is opened inside the test frame 1, the inner cavity is used to place the clamping mechanism 2 and the reset member 3, one side of the moving rod 23 is fixedly connected to a connecting rod 231, the bottom end of the connecting rod 231 is fixedly connected to a compression spring 232, the connecting rod 231 is elastically connected to the limit block 233 through the compression spring 232, and the limit block 233 is connected to the inner wall of the test frame 1, a protrusion is provided on one side of the connecting rod 231, and the connecting rod 231 can be slidably connected to the inner cavity of the test frame 1 through the protrusion.

[0033] The above scheme is adopted: one end of the first inclined block 22 is fixedly connected to the first clamping plate 21, and the other end is overlapped with the top inclined surface of the moving rod 23. Under the push of the moving rod 23, the first clamping plate 21 can be driven to move to realize the clamping action, and the telescopic spring 31 connected thereto will be compressed during the movement, and the resetting and releasing action will be subsequently realized by relying on the elastic force of the telescopic spring 31. Through the setting of the fixing part 4, the bottom end of one test frame 1 is connected to the top of another test frame 1, and the elastic column 41 is pushed downward. After the elastic column 41 is subjected to force, it will drive the buckle 42 to move downward accordingly. During the movement, the buckle 42 will gradually move out of the interior of the fixed rod 5 and enter the interior of the test frame 1. When the buckle 42 continues to move until it contacts the clamping plate 43, since the clamping plate 43 is connected to the test frame 1 through the rotating shaft 431, the rotating shaft 431 will rotate at this time, thereby making the buckle 42 and the card plate 43 can be connected to each other. Thereafter, the elastic column 41 and the compression spring piece 432 fixedly connected to one side of the card plate 43 will respectively drive the card buckle 42 and the card plate 43 to perform a reset movement by virtue of their own elasticity. In this way, the clamping force between the card buckle 42 and the card plate 43 is further strengthened, thereby achieving a stable connection between the two test frames 1, so that corresponding tests can be carried out on multiple pressure sensors. By connecting the bottom end of one test frame 1 with the top of another test frame 1, the number of test frames 1 can be flexibly increased according to actual needs, so that multiple pressure sensors can be tested at the same time without having to test the pressure sensors one by one, which greatly improves the overall test efficiency. Especially when a large number of pressure sensors need to be tested, the test cycle can be effectively shortened and relevant test data of all sensors can be obtained more quickly.

[0034] like Figures 1 to 6 As shown, the reset member 3 includes a telescopic spring 31 fixedly connected to the first inclined block 22, a positioning block 32 fixedly connected to the bottom surface of the second inclined block 24, a reset spring 33 fixedly connected to one side of the positioning block 32, and a limiting block 34 fixedly connected to one end of the reset spring 33. One end of the telescopic spring 31 is connected to the inner wall of the test frame 1. The first inclined block 22 will compress the telescopic spring 31 when moving. The positioning block 32 is slidably connected to the test frame 1, and the limiting block 34 is fixedly connected to the test frame 1. The two first clamps 21 can be spliced ​​into a circle, and the two The radius of the circle formed by the first clamping plates 21 is smaller than the radius of the top end of the pressure sensor, and the radius of the two second clamping plates 25 is larger than the radius of the bottom end of the pressure sensor. The internal rotation of the clamping plate 43 is connected with a rotating shaft 431, and the rotating shaft 431 is fixedly connected to the test frame 1. The top of the clamping plate 43 is fixedly connected with a toggle block, and one side of the clamping plate 43 is fixedly connected with a compression spring piece 432. The clamping plate 43, the rotating shaft 431 and the compression spring piece 432 are all located inside the top end of the test frame 1. The top surface of the test frame 1 is clamped with a fixed cover 6, and the fixed cover 6 is used to limit the first inclined block 22.

[0035] The above scheme is adopted: one end of the telescopic spring 31 is connected to the inner wall of the test frame 1, and the other end is connected to the first inclined block 22. When the first inclined block 22 is pushed, it is compressed to store elastic potential energy. When the external force is removed (such as when the clamp is released), the first inclined block 22 is pushed to reset by its own elastic force, driving the first clamping plate 21 to loosen the top of the pressure sensor. The positioning block 32 is slidably connected to the test frame 1, the limiting block 34 is fixedly connected to the test frame 1, and the reset spring 33 is connected between the positioning block 32 and the limiting block 34. The overall structure is used to rely on the elastic force of the reset spring 33 to make the second inclined block 24 drive the second clamping plate 25 to reset after the second inclined block 24 moves, thereby loosening the clamping of the bottom end of the pressure sensor.

[0036] The working principle and use process of the present invention: The pressure sensor used in the instrument is generally in a shape of being larger at the top and smaller at the bottom. Because the initial state of the first clamp plate 21 is that the radius of the first clamp plate 21 is smaller than the radius of the top of the pressure sensor, and the radius of the second clamp plate 25 is larger than the radius of the bottom of the pressure sensor, when the pressure sensor is placed inside the test stand 1, a series of chain actions will be triggered to fix the pressure sensor. First, the pressure sensor touches the first clamp plate 21. After the first clamp plate 21 is subjected to force, it pushes the first inclined block 22 fixedly connected thereto to move in parallel. During this process, the first inclined block 22 will squeeze the telescopic spring 31 connected thereto, causing the telescopic spring 31 to be compressed and store elastic potential energy. With the parallel movement of the first inclined block 22, because its other end overlaps the top of the moving rod 23 in an inclined plane, it will push the moving rod 23 to move downward. When the moving rod 23 moves downward, since one side of it is fixedly connected to the connecting rod 231, the connecting rod 231 will also move downward, thereby squeezing the limit block 233 elastically connected to its bottom end through the compression spring 232, so that the compression spring 232 is compressed. At the same time, the inclined surface at the bottom of the moving rod 23 overlaps the inclined surface at one end of the second inclined block 24. When the moving rod 23 moves downward, it will push the second inclined block 24 to move parallel. After the second inclined block 24 moves, on the one hand, it will push the second clamping plate to approach the bottom end of the pressure sensor until the second clamping plate is connected to the bottom end of the pressure sensor, thereby fixing the bottom end of the pressure sensor; on the other hand, the positioning block 32 fixedly connected to the bottom surface of the second inclined block 24 will move together with the second inclined block 24, and one side of the positioning block 32 is connected to the reset spring 33. When the positioning block 32 moves, it will squeeze the reset spring 33 to deform the reset spring 33. After the above-mentioned components complete the corresponding actions, the fixing cover 6 is connected to the test frame 1. The fixing cover 6 can limit the first inclined block 22. At this time, with the coordinated cooperation of the first clamping plate 21, the second clamping plate and various related components, the pressure sensor is stably fixed in the test frame 1, ready for subsequent related tests and other operations;

[0037] First, connect the bottom end of one test frame 1 to the top of another test frame 1. Then, push the elastic column 41 downward. After the elastic column 41 is stressed, it will drive the buckle 42 to move downward. During the movement, the buckle 42 will gradually move out of the interior of the fixed rod 5 and enter the interior of the test frame 1. When the buckle 42 continues to move until it contacts the card plate 43, since the card plate 43 is connected to the test frame 1 through the rotating shaft 431, the rotating shaft 431 will rotate at this time, so that the buckle 42 and the card plate 43 can be clamped together. After that, the compression spring 432 fixedly connected to one side of the elastic column 41 and the card plate 43 will respectively drive the buckle 42 and the card plate 43 to perform a reset movement by virtue of its own elasticity. In this way, the clamping force between the buckle 42 and the card plate 43 is further strengthened, thereby achieving a stable connection between the two test frames 1, so as to carry out corresponding testing work on multiple pressure sensors;

[0038] After the pressure sensor is stably clamped and fixed on the test frame 1, the corresponding test circuits and equipment can be connected to carry out various performance index tests on the pressure sensor according to a predetermined test plan, such as detecting its output signal under different pressures.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

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

Claims

1. A pressure sensor testing device, comprising a test stand (1), characterized in that: A clamping mechanism (2) and a reset member (3) are provided on both sides of the interior of the test frame (1); a fixing rod (5) is installed on the bottom surface of the test frame (1); and a fixing member (4) is installed inside the fixing rod (5); The clamping mechanism (2) comprises a first clamping plate (21), a first inclined block (22), a moving rod (23), a second inclined block (24) and a second clamping plate (25), wherein the first clamping plate (21) is fixedly connected to one end of the first inclined block (22), the other end of the first inclined block (22) overlaps the top of the moving rod (23), and the bottom end of the moving rod (23) overlaps one end of the second inclined block (24), and the second clamping plate (25) is fixedly connected to the other end of the second inclined block (24); The fixing member (4) comprises an elastic column (41) fixedly connected to the inside of the fixing rod (5), a buckle (42) fixedly connected to the bottom of the elastic column (41), and a clamping plate (43) abutting against the buckle (42).

2. The pressure sensor testing device according to claim 1, characterized in that: The number of the first clamping plates (21) is two, and the two first clamping plates (21) are symmetrically distributed inside the test frame (1), and the two first clamping plates (21) are both in an arc shape.

3. The pressure sensor testing device according to claim 1, characterized in that: The end of the first inclined block (22) opposite to the moving rod (23) is in the shape of an inclined plane, both ends of the moving rod (23) are in the shape of an inclined plane, and the end of the second inclined block (24) opposite to the moving rod (23) is in the shape of an inclined plane.

4. The pressure sensor testing device according to claim 2, characterized in that: The number of the second clamping plates (25) is two, and the two second clamping plates (25) are arc-shaped, and the inner walls are provided with threads. The interior of the test frame (1) is provided with an inner cavity, and the inner cavity is used to place the clamping mechanism (2) and the reset member (3).

5. The pressure sensor testing device according to claim 1, characterized in that: A connecting rod (231) is fixedly connected to one side of the moving rod (23), a compression spring (232) is fixedly connected to the bottom end of the connecting rod (231), the connecting rod (231) is elastically connected to a limit block (233) via the compression spring (232), and the limit block (233) is connected to the inner wall of the test frame (1), a protruding block is provided on one side of the connecting rod (231), and the connecting rod (231) can be slidably connected to the inner cavity of the test frame (1) via the protruding block.

6. The pressure sensor testing device according to claim 1, characterized in that: The reset member (3) comprises a telescopic spring (31) fixedly connected to the first inclined block (22), a positioning block (32) fixedly connected to the bottom surface of the second inclined block (24), a reset spring (33) fixedly connected to one side of the positioning block (32), and a limiting block (34) fixedly connected to one end of the reset spring (33).

7. The pressure sensor testing device according to claim 6, characterized in that: One end of the telescopic spring (31) is connected to the inner wall of the test frame (1); the first inclined block (22) compresses the telescopic spring (31) when moving; the positioning block (32) is slidably connected to the test frame (1); and the limiting block (34) is fixedly connected to the test frame (1).

8. The pressure sensor testing device according to claim 4, characterized in that: The two first clamping plates (21) can be spliced ​​into a circle, and the radius of the circle formed by the two first clamping plates (21) is smaller than the radius of the top end of the pressure sensor, and the radius of the two second clamping plates (25) is larger than the radius of the bottom end of the pressure sensor.

9. The pressure sensor testing device according to claim 1, characterized in that: The interior of the card plate (43) is rotatably connected to a rotating shaft (431), the rotating shaft (431) is fixedly connected to the test stand (1), the top of the card plate (43) is fixedly connected to a toggle block, and one side of the card plate (43) is fixedly connected to a compression spring sheet (432).

10. The pressure sensor testing device according to claim 9, characterized in that: The clamping plate (43), the rotating shaft (431) and the compression spring sheet (432) are all located inside the top end of the test frame (1); a fixing cover (6) is clamped on the top surface of the test frame (1); and the fixing cover (6) is used to limit the first inclined block (22).

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