Sensor fatigue test experimental device

Abstract

The utility model relates to the technical field of pressure sensor testing, and discloses a sensor fatigue test experimental device which comprises a base and an extrusion block located above the base, limiting sliding grooves are formed in the two sides of the base respectively, lower wedge-shaped push plates are connected to the inner sides of the two limiting sliding grooves in a sliding mode respectively, clamping plates are fixedly connected to the upper sides of the two lower wedge-shaped push plates, and the clamping plates are connected with the extrusion block. The upper wedge-shaped push plate and the lower wedge-shaped push plate are matched with each other, a sensor extrusion mechanism for carrying out repeated extrusion fatigue test on the pressure sensor is arranged above the clamping plates, and a clamping plate driving mechanism for pushing the two clamping plates to be close to each other and clamping and fixing the pressure sensor is arranged above the lower wedge-shaped push plate. When a pressure fatigue test is carried out, the upper wedge-shaped push plate is pressed down to indirectly drive the two clamping plates to fix and clamp the pressure sensor, so that the reliability of fatigue test implementation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensor testing, in particular to a sensor fatigue testing experimental device. Background Art

[0002] Before pressure sensors are introduced to the market, they need to undergo a large number of tests. Fatigue testing can test the pressure limit of pressure sensors by repeating a large number of experiments. This has important guiding significance for the subsequent installation and use of pressure sensors. Existing pressure sensor fatigue test experimental devices generally have the problem of being difficult to install and fix, which brings inconvenience to experimenters when conducting tests.

[0003] For example, a sensor fatigue testing device is disclosed in a Chinese utility model patent with announcement number CN215296289U. This scheme first drives the screw rod and the pressure block downward through a rotating handle to fix the pressure sensor, and then controls the test rod to extend and retract back and forth through a motor to continuously impact the other end of the sensor, thereby achieving a repetitive fatigue test. However, this scheme has very cumbersome processes of fixing the pressure sensor to the experimental device and removing the pressure sensor from the experimental device by rotating the rotating handle after the test is completed, which is not conducive to improving the efficiency of fatigue testing. Based on this, a sensor fatigue testing experimental device is proposed. Utility Model Content

[0004] In order to solve the technical problems of pressure sensor testing technology, the utility model provides a sensor fatigue testing experimental device.

[0005] The utility model is implemented by the following technical scheme: a sensor fatigue test experimental device, comprising a base and an extrusion block located above the base, wherein limited sliding grooves are respectively provided on both sides of the base, and lower wedge-shaped push plates are slidably connected to the inner sides of the two limited sliding grooves respectively, and a clamping plate is fixedly connected to the upper sides of the two lower wedge-shaped push plates, and a sensor extrusion mechanism for repeatedly extruding fatigue tests on the pressure sensor is arranged above the clamping plate, a clamping plate driving mechanism for pushing the two clamping plates to be close to each other and clamping and fixing the pressure sensor is arranged above the lower wedge-shaped push plate, and a push plate resetting mechanism for resetting the lower wedge-shaped push plate is arranged on one side of the lower wedge-shaped push plate.

[0006] As a further improvement of the above scheme, the sensor extrusion mechanism includes a support plate fixedly connected to the upper side of the base, one side of the support plate is fixedly connected to a limiting platform, and one side of the support plate is provided with an extrusion block driving mechanism for enabling the extrusion block to apply pressure to the top of the pressure sensor.

[0007] As a further improvement of the above scheme, the extrusion block driving mechanism includes an electric cylinder fixedly connected to one side of the support plate, the output end of the electric cylinder is fixedly connected to a curved slider slidably connected to one side of the limit platform, and the lower side of the curved slider is provided with a connecting rod extrusion mechanism which converts the rising or falling height of the curved surface of the curved slider into extrusion of the extrusion block.

[0008] As a further improvement of the above scheme, the connecting rod extrusion mechanism includes a limit plate fixedly connected to one side of the support plate, one side of the limit plate is slidably connected to a connecting rod fixedly connected to the upper side of the extrusion block, the upper end of the connecting rod is rotatably connected to a roller abutting the lower side of the curved slider, and a No. 1 spring is arranged between the connecting rod and the limit plate.

[0009] As a further improvement of the above solution, the clamping plate driving mechanism includes an upper wedge-shaped push plate which is respectively fixedly connected to both sides of the connecting rod and cooperates with the lower wedge-shaped push plate.

[0010] Through the above technical solution, the ports of the upper wedge-shaped push plate and the lower wedge-shaped push plate both adopt a wedge-shaped cross-section design, and the wedge-shaped extrusion principle is used to achieve the pushing and extrusion effects.

[0011] As a further improvement of the above solution, the push plate resetting mechanism includes No. 2 springs respectively arranged between the two lower wedge-shaped push plates and the base.

[0012] Through the above technical solution, when the upper wedge-shaped push plate rises upward, under the rebound action of the second spring, the two upper wedge-shaped push plates can move back and reset along the limiting slide groove, thereby releasing the clamping of the pressure sensor and facilitating unloading and replacement of the sensor.

[0013] As a further improvement of the above solution, the lower side of the base is respectively provided with limiting holes for the two upper wedge-shaped push plates to pass through.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model cooperates with the upper wedge-shaped push plate, the lower wedge-shaped push plate, the connecting rod, the No. 1 spring, the curved slider and the clamping plate, so that the pressure sensor can be clamped and fixed from both sides while the extrusion block squeezes the pressure sensor from top to bottom. The operation is very simple and efficient.

[0016] 2. The utility model achieves the effect of clamping and fixing the pressure sensor by two clamping plates through the cooperation of the limit slide groove, the lower wedge-shaped push plate, the second spring and the clamping plate, and adopts a method in which a lower wedge-shaped push plate slides in the limit slide groove respectively, which is beneficial to the alignment and straightening operation of the extrusion block and the upper side of the pressure sensor. The system error generated in this way is smaller and the clamping accuracy is higher. In this way, when repeated pressure fatigue tests are performed, the data obtained are more accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the sensor fatigue test experimental device provided by the utility model;

[0018] Figure 2 A bottom view of the sensor fatigue test experimental device provided by the utility model;

[0019] Figure 3 A cross-sectional view of a sensor fatigue test experimental device provided by the utility model;

[0020] Figure 4 for Figure 3 Schematic diagram of the structure enlarged at point A in the middle.

[0021] Description of main symbols:

[0022] 1. Base; 2. Upper wedge-shaped push plate; 3. Support plate; 4. Electric cylinder; 5. Curved slider; 6. Limit table; 7. Roller; 8. No. 1 spring; 9. Limit plate; 10. Connecting rod; 11. Extrusion block; 12. Clamping plate; 13. Lower wedge-shaped push plate; 14. Limit slide groove; 15. No. 2 spring; 16. Limit hole. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0024] Example:

[0025] Please combine Figure 1-Figure 3 The sensor fatigue test experimental device of this embodiment includes a base 1 and an extrusion block 11 located above it. Before performing the pressure fatigue test, the pressure sensor is first placed in the center of the base 1 before it is close to the clamping card plate 12. Limiting grooves 14 are respectively provided on both sides of the base 1. The inner sides of the two limiting grooves 14 are respectively slidably connected with lower wedge-shaped push plates 13. The upper sides of the two lower wedge-shaped push plates 13 are fixedly connected with card plates 12. The card plates 12 have a certain height, so that the clamping and fixing effect of the pressure sensor will be more effective. A sensor squeezing mechanism for repeatedly squeezing fatigue tests on the pressure sensor is arranged above the card plates 12. A card plate driving mechanism for pushing the two card plates 12 to approach each other and clamping and fixing the pressure sensor is arranged above the lower wedge-shaped push plate 13. A push plate resetting mechanism for resetting the lower wedge-shaped push plate 13 is arranged on one side of the lower wedge-shaped push plate 13.

[0026] Please combine Figure 1As shown, the sensor extrusion mechanism includes a support plate 3 fixedly connected to the upper side of the base 1, one side of the support plate 3 is fixedly connected to a limiting platform 6, and one side of the support plate 3 is provided with an extrusion block driving mechanism for causing the extrusion block 11 to apply pressure to the top of the pressure sensor.

[0027] Please combine Figure 1 As shown, the extrusion block driving mechanism includes an electric cylinder 4 fixedly connected to one side of the support plate 3, and the output end of the electric cylinder 4 is fixedly connected to a curved slider 5 slidably connected to one side of the limit platform 6. A certain groove is arranged on the curved side of the curved slider 5 to facilitate the limited rolling of the roller 7 and prevent the connecting rod 10 from rotating. The lower side of the curved slider 5 is provided with a connecting rod extrusion mechanism which converts the rising or falling height of the curved surface of the curved slider 5 into extrusion of the extrusion block 11.

[0028] Please combine Figure 1 As shown, the connecting rod extrusion mechanism includes a limit plate 9 fixedly connected to one side of the support plate 3, and one side of the limit plate 9 is slidably connected to a connecting rod 10 fixedly connected to the upper side of the extrusion block 11, and the upper end of the connecting rod 10 is rotatably connected to a roller 7 abutting against the lower side of the curved slider 5. The material of the roller 7 is composite rubber with excellent wear resistance. A No. 1 spring 8 is arranged between the connecting rod 10 and the limit plate 9, and the No. 1 spring 8 can ensure that the roller 7 is always in abutment with the curved surface of the curved slider 5.

[0029] The card plate driving mechanism includes an upper wedge-shaped push plate 2 which is fixedly connected to both sides of the connecting rod 10 and cooperates with the lower wedge-shaped push plate 13 .

[0030] Please combine Figure 3 and Figure 4 As shown, the push plate reset mechanism includes No. 2 springs 15 respectively arranged between the two lower wedge-shaped push plates 13 and the base 1, and a limiting rod is arranged between the two No. 2 springs 15. At the same time, limiting sliding holes are opened on the lower wedge-shaped push plates 13 on both sides. When the two lower wedge-shaped push plates 13 are close to each other, the limiting rod can be retracted into the limiting sliding hole, thereby improving the clamping and fixing accuracy of the two clamping plates 12.

[0031] Please combine Figure 2 As shown, the lower side of the base 1 is respectively provided with limiting holes 16 for the two upper wedge-shaped push plates 2 to pass through. When the upper wedge-shaped push plates 2 are pressed down to a certain extent, the upper wedge-shaped push plates 2 can pass through the limiting holes 16. At this time, the two upper wedge-shaped push plates 2 can maintain the clamping state of the two clamping plates 12.

[0032] The implementation principle of the sensor fatigue test experimental device in the embodiment of the present application is as follows: when the pressure sensor is fixed directly below the extrusion block 11, the electric cylinder 4 is started, and the curved slider 5 moves to one side along the limit platform 6. Due to the change in the height of the curved surface of the curved slider 5, a pushing effect on the roller 7 is generated, and the connecting rod 10 is pressed down, and the No. 1 spring 8 is deformed under pressure. The extrusion block 11 contacts the pressure sensor and generates a compressive effect. At this time, the upper wedge-shaped push plates 2 on both sides of the connecting rod 10 are in contact with the lower wedge-shaped push plates 13, forming an abutting pushing effect, and the two lower wedge-shaped push plates 13 are close to each other, driving the two clamping plates 12 to approach, forming an effect of clamping and fixing the pressure sensor from both sides.

[0033] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A sensor fatigue test experimental device, comprising a base (1) and an extrusion block (11) located above the base, characterized in that: The base (1) is provided with limited sliding grooves (14) on both sides, and the inner sides of the two limited sliding grooves (14) are slidably connected with lower wedge-shaped push plates (13), and the upper sides of the two lower wedge-shaped push plates (13) are fixedly connected with a clamping plate (12). A sensor squeezing mechanism for repeatedly squeezing fatigue test on the pressure sensor is arranged above the clamping plate (12), and a clamping plate driving mechanism for pushing the two clamping plates (12) to approach each other and clamp and fix the pressure sensor is arranged above the lower wedge-shaped push plate (13), and a push plate resetting mechanism for resetting the lower wedge-shaped push plate (13) is arranged on one side of the lower wedge-shaped push plate (13).

2. The sensor fatigue test experimental device according to claim 1, characterized in that: The sensor squeezing mechanism comprises a support plate (3) fixedly connected to the upper side of the base (1), one side of the support plate (3) being fixedly connected to a limiting platform (6), and one side of the support plate (3) being provided with an squeezing block driving mechanism for causing a squeezing block (11) to apply pressure to the upper side of the pressure sensor.

3. The sensor fatigue test experimental device according to claim 2, characterized in that: The extrusion block driving mechanism comprises an electric cylinder (4) fixedly connected to one side of the support plate (3); the output end of the electric cylinder (4) is fixedly connected to a curved slider (5) slidably connected to one side of the limit platform (6); and the lower side of the curved slider (5) is provided with a connecting rod extrusion mechanism for converting the rising or falling height of the curved surface of the curved slider (5) into extrusion of the extrusion block (11).

4. The sensor fatigue test experimental device according to claim 3, characterized in that: The connecting rod extrusion mechanism comprises a limit plate (9) fixedly connected to one side of the support plate (3); one side of the limit plate (9) is slidably connected to a connecting rod (10) fixedly connected to the upper side of the extrusion block (11); the upper end of the connecting rod (10) is rotatably connected to a roller (7) abutting against the lower side of the curved slider (5); and a No. 1 spring (8) is provided between the connecting rod (10) and the limit plate (9).

5. The sensor fatigue test experimental device according to claim 1, characterized in that: The card plate driving mechanism comprises an upper wedge-shaped push plate (2) which is fixedly connected to both sides of the connecting rod (10) and cooperates with a lower wedge-shaped push plate (13).

6. The sensor fatigue test experimental device according to claim 1, characterized in that: The push plate resetting mechanism comprises two springs (15) respectively arranged between the two lower wedge-shaped push plates (13) and the base (1).

7. The sensor fatigue test experimental device according to claim 1, characterized in that: The lower side of the base (1) is provided with limiting holes (16) for the two upper wedge-shaped push plates (2) to pass through.

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