Testing device

Abstract

The utility model provides a testing device which can be used for improving the testing accuracy and reliability of a pressure sensor in a high-low temperature testing environment, the testing device comprises a fixed plate, a floating plate and a carrier which are sequentially stacked, the carrier is used for placing a device to be tested, and the fixed plate and the carrier are arranged in an up-and-down limiting mode. The floating plate is arranged between the carrier and the fixed plate; a deformation device is arranged between the floating plate and the fixed plate, the floating plate abuts against the carrier through the deformation device, and when the floating plate moves up and down, the deformation device adaptively deforms and keeps applying force opposite to the deformation direction to the floating plate; the floating plate comprises at least one air inlet pipeline extending to the outer side of the fixed plate, the fixed plate is provided with a via hole for the air inlet pipeline to pass through, the carrier is provided with a plurality of bearing grooves for bearing devices to be tested, and through holes communicated to the bearing grooves are formed in the air inlet pipeline.

Description

Technical Field

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

[0002] In high and low temperature test environments, due to temperature fluctuations, the physical properties of the material, such as thermal expansion and contraction, will affect the structural stability and functionality of the device. The dimensional changes caused by thermal expansion and contraction will especially affect the contact quality of the pins. The pins are a key part of the electrical connection, and any poor contact may lead to inaccurate data transmission, thus affecting the reliability and effectiveness of the entire test. In addition, the dimensional changes of the device caused by thermal expansion and contraction will cause airtightness problems, reducing the reliability and accuracy of the test. Utility Model Content

[0003] The purpose of the utility model is to provide a testing device.

[0004] The utility model provides a testing device, which comprises a fixed plate, a floating plate and a carrier which are stacked in sequence, the carrier is used to place a device to be tested, the fixed plate and the carrier are set with upper and lower limit positions, and the floating plate is set between the carrier and the fixed plate;

[0005] A deformation device is provided between the floating plate and the fixed plate, and the floating plate is abutted against the carrier through the deformation device. When the floating plate is displaced up and down, the deformation device deforms adaptively and keeps applying a force opposite to the deformation direction to the floating plate;

[0006] The floating plate includes at least one air intake duct extending to the outside of the fixed plate, the fixed plate is provided with a through hole for the air intake duct to pass through, the carrier is provided with a plurality of bearing grooves for bearing the device under test, and the air intake duct is formed with a through hole connected to the bearing groove.

[0007] The beneficial effect of the utility model is that the utility model provides a test device that can be used to improve the test accuracy and reliability of the pressure sensor in a high and low temperature test environment. The test device is provided with a deformation device between a floating plate and a fixed plate, and the deformation device can adaptively deform when the floating plate moves up and down, and exert a reverse force to maintain the stability of the floating plate, so that the position of the floating plate can be dynamically adjusted to adapt to the temperature change and device displacement during the test process, so as to maintain good contact and airtightness with the test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of a testing device in one embodiment of the utility model. DETAILED DESCRIPTION

[0009] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific implementation methods of the utility model and the corresponding drawings. Obviously, the described implementation methods are only part of the implementation methods of the utility model, not all of the implementation methods. Based on the implementation methods in the utility model, all other implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0010] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0011] This embodiment provides a testing device that can be used to improve the test accuracy and reliability of a pressure sensor in a high and low temperature test environment. The testing device is provided with a deformation device between a floating plate and a fixed plate, and the deformation device can adaptively deform when the floating plate moves up and down, and exert a reverse force to maintain the stability of the floating plate, so that the position of the floating plate can be dynamically adjusted to adapt to the temperature change and device displacement during the test process, so as to maintain good contact and airtightness with the test device.

[0012] like Figure 1 As shown, this embodiment provides a test device, characterized in that it includes a fixed plate 1, a floating plate 2 and a carrier 3 stacked in sequence. The carrier 3 is used to place the device to be tested (not shown). The fixed plate 1 and the carrier 3 are set with upper and lower limit positions, and the floating plate 2 is set between the carrier 3 and the fixed plate 1.

[0013] The fixed plate 1 is the upper structure of the test device, and its main function is to provide stable support and positioning reference. The floating plate 2 is located between the fixed plate 1 and the carrier 3, and is the active part of the test device. It can move up and down within a certain range to adapt to the physical changes or displacements of the device during the test. The carrier 3 is the bottom component of the test device. The carrier 3 includes a plurality of bearing slots 31 with specific shapes and sizes, and the bearing slots 31 are used to place the pressure sensors to be tested.

[0014] The highest position of the fixing plate 1 and the lowest position of the carrier 3 are limited by the positioning structure 4 between the fixing plate 1 and the carrier 3, so that the testing device is fixed as a whole.

[0015] A deformation device 5 is provided between the floating plate 2 and the fixed plate 1 , and the floating plate 2 is abutted against the carrier 3 through the deformation device 5 . When the floating plate 2 moves up and down, the deformation device 5 deforms adaptively and keeps applying a force opposite to the deformation direction to the floating plate 2 .

[0016] The deformation device 5 is a mechanical element that can change its shape under the action of force. The deformation device 5 is arranged between the fixed plate 1 and the floating plate 2, and plays the role of mechanical support and deformation adjustment. When the floating plate 2 is displaced up and down due to the pressure sensor being tested or environmental factors (such as temperature changes), the deformation device 5 can adaptively deform and extend or shorten according to the movement of the floating plate 2. In addition, the deformation device 5 can also apply a force in the opposite direction of its deformation, compensating for the gap caused by thermal expansion and contraction of the test device during high and low temperature testing, helping the floating plate 2 to maintain a close connection with the test device and avoiding damage to the test device.

[0017] The floating plate 2 includes at least one air intake pipe 21 extending to the outside of the fixed plate 1, the fixed plate 1 is provided with a through hole 11 for the air intake pipe 21 to pass through, and a through hole connected to the bearing groove 31 is formed in the air intake pipe 21. The air intake pipe 21 extends from the floating plate 2 to the outside of the fixed plate 1, and the lower end leads to the bearing groove 31 of the carrier 3, so that the pressure gas source can be introduced into the test device through the air intake pipe 21 for testing.

[0018] Furthermore, the floating plate 2 includes a flat plate portion 22 and an air intake duct 21 extending outward from the flat plate portion 22, the flat plate portion 22 abuts against the carrier 3, and the flat plate portion 22 is spaced apart from the fixed plate 1 to avoid movement space for the deformation device 5, and the air intake duct 21 extends to the outside of the fixed plate 1 through the through hole 11 of the fixed plate 1.

[0019] In this embodiment, the deformation device 5 is an elastic structural member 51, and the elastic structural member 51 is respectively in contact with the floating plate 2 and the fixed plate 1. When the floating plate 2 is displaced up and down, the elastic structural member 51 is elastically deformed. The elastic structural member 51 is a component that is deformed when subjected to an external force and can return to its original state after the external force is removed, such as a spring, a rubber pad or a component made of other flexible materials. The elastic structural member 51 can dynamically adjust its length and tension according to the up and down displacement of the floating plate 2, provide an appropriate amount of reverse force, and thus play the role of the above-mentioned deformation device 5.

[0020] Specifically, the elastic structural member is a spring coil sleeved on the intake duct 21, and the spring coil is respectively in contact with the fixed plate 1 and the floating plate 2. Since the spring coil is sleeved on the intake duct 21 and directly arranged at the test device, it can effectively respond to the deformation of the test device caused by factors such as thermal expansion and contraction, ensuring that even when the physical form changes slightly, the floating plate 2 can maintain good contact with the test device, thereby improving the accuracy and reliability of the test results.

[0021] In some other embodiments of the present invention, the deformation device 5 is a constant pressure cylinder disposed between the fixed plate 1 and the floating plate 2. The constant pressure cylinder can accurately control its deformation and expansion by adjusting the air pressure in the air chamber, thereby applying an adjustable force to the floating plate 2. Since the constant pressure cylinder can provide precise force control, the accuracy of the test process can be significantly improved.

[0022] In addition to the elastic structural member 51 and the constant-pressure cylinder, other actuators such as piezoelectric actuators, hydraulic or pneumatic actuators, and thermal expansion actuators may also be used.

[0023] Furthermore, the fixed plate 1 is provided with a guide column 12 arranged toward the floating plate 2 and the carrier 3, the floating plate 2 is provided with a guide hole 23 for the guide column 12 to pass through, the carrier 3 is provided with a guide groove 32 for accommodating the guide column 12, and the guide column 12 passes through the guide hole 23 and is placed in the guide groove 32.

[0024] By providing the guide post 12 and its matching guide hole 23 and guide slot 32, accurate alignment and stable movement between the floating plate 2 and the carrier 3 can be ensured. The guide post 12 can provide a stable and reliable mechanical axis to guide the floating plate 2 to move accurately along the set path. The guide hole 23 is provided on the floating plate 2, and its size and shape match those of the guide post 12. The guide hole 23 allows the floating plate 2 to move vertically under the guidance of the guide post 12. The guide slot 32 is located on the carrier 3 to accommodate the lower end of the guide post 12. The guide slot 32 not only supports the guide post 12, but also ensures the vertical or predetermined direction stability of the guide post 12 to prevent deflection or distortion during the test process.

[0025] Furthermore, the guide column 12 is provided with a spring coil, and the spring coil abuts against the fixed plate 1 and the floating plate 2 respectively. On the basis of installing the spring coil on the intake pipe, by also installing the spring coil on the guide column 12, additional longitudinal elastic support is further provided to help the floating plate 2 maintain smooth movement in the vertical direction, further enhancing the overall stability of the test device. When the floating plate 2 needs to move up or down to adapt to the placement or adjustment of the test piece, the synergistic effect of the two sets of spring coils can better disperse the load, provide balanced pressure and restoring force, and thus reduce the structural stress caused by uneven load.

[0026] The guide posts 12 can be evenly distributed in the test device, or evenly set at the edge of the test device. Evenly distributed guide posts 12 can provide more balanced support and stability, helping to reduce distortion or bending caused by uneven loads or external forces. The guide posts 12 are evenly set at the edge of the test device, which can maximize the test area while ensuring strength.

[0027] Furthermore, the fixed plate 1, the floating plate 2 and the carrier 3 are provided with positioning holes, and the positioning structure 4 passes through the positioning holes of the fixed plate 1, the floating plate 2 and the carrier 3 respectively, and the two ends of the positioning structure 4 respectively limit the fixed plate 1 and the carrier 3.

[0028] The positioning structure 4 passes through the positioning holes of the fixed plate 1, the floating plate 2 and the carrier 3 respectively, and fixes the fixed plate 1 and the carrier 3 in appropriate relative positions. By setting limit stops at both ends, the positioning structure 4 fixes the positions of the fixed plate 1 and the carrier 3, thereby maintaining the fixation of the structure and the overall mechanical strength, ensuring the stability and accuracy of the device during operation.

[0029] In this embodiment, the positioning structure 4 includes a long bolt and a nut. The long bolt made of metal is sufficient to withstand the mechanical load and pressure during the test. One end of the bolt will have a flat head or a pre-installed large washer to abut against the fixed plate 1. The other end of the bolt passes through the positioning holes on the floating plate 2 and the carrier 3, and finally fixed by installing a nut on the outside of the carrier 3 to ensure that all parts are tightly combined and accurately positioned. The fixing method using bolts and nuts not only ensures strength and stability, but also facilitates disassembly and maintenance of the device when necessary.

[0030] In addition to the long bolts, pins, clamps, positioning plates, etc. can also be used as the positioning structural member 4.

[0031] Furthermore, the air intake duct 21 is provided with a limiting structure 24 on the outside of the fixing plate 1 , and the limiting structure 24 abuts against the fixing plate 1 .

[0032] The initial position of the floating plate 2 is limited by providing a limiting structure 24 , and the limiting structure 24 may be a protruding structure, a stopper, a pin, or other forms of mechanical blocking provided on the outside of the fixed plate 1 by the air intake duct 21 .

[0033] In this embodiment, the outer wall surface of the top end of the air intake pipe 21 is provided with threads, and the limiting structure 24 is a bolt sleeved on the air intake pipe 21 .

[0034] Furthermore, a sealing gasket 25 is provided on one side of the air intake duct 21 close to the bearing groove 31 .

[0035] The sealing gasket 25 is a soft gasket made of rubber or silicone. The sealing gasket 25 is provided to prevent gas leakage and prevent external impurities or moisture from entering the system, thereby ensuring the reliability and accuracy of the pressure test.

[0036] In summary, the test device provided in this embodiment is used to improve the test accuracy and reliability of the pressure sensor in a high and low temperature test environment. A deformation device 5 is arranged between the floating plate 2 and the fixed plate 1. The deformation device 5 can adaptively deform when the floating plate 2 moves up and down, and exert a reverse force to maintain the stability of the floating plate 2, so that the position of the floating plate 2 can be dynamically adjusted to adapt to the temperature change and device displacement during the test process, so as to maintain good contact and airtightness with the test device.

[0037] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0038] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model and are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A testing device, characterized in that: It comprises a fixed plate, a floating plate and a carrier which are stacked in sequence, the carrier is used to place the device to be tested, the fixed plate and the carrier are set with upper and lower limit positions, and the floating plate is set between the carrier and the fixed plate; A deformation device is provided between the floating plate and the fixed plate, and the floating plate is abutted against the carrier through the deformation device. When the floating plate is displaced up and down, the deformation device deforms adaptively and keeps applying a force opposite to the deformation direction to the floating plate; The floating plate includes at least one air intake duct extending to the outside of the fixed plate, the fixed plate is provided with a through hole for the air intake duct to pass through, the carrier is provided with a plurality of bearing grooves for bearing the device under test, and the air intake duct is formed with a through hole connected to the bearing groove.

2. The testing device according to claim 1, characterized in that: The floating plate includes a flat plate portion and an air intake duct extending outward from the flat plate portion, the flat plate portion abuts against the carrier, and the flat plate portion is spaced apart from the fixed plate to avoid movement space of the deformation device, and the air intake duct extends to the outside of the fixed plate through a through hole of the fixed plate.

3. The testing device according to claim 2, characterized in that: The deformation device is an elastic structural member, and the elastic structural member is respectively in contact with the floating plate and the fixed plate. When the floating plate is displaced up and down, the elastic structural member is elastically deformed.

4. The testing device according to claim 3, characterized in that: The elastic structural member is a spring ring sleeved on the air intake pipe, and the spring ring is respectively in contact with the fixed plate and the floating plate.

5. The testing device according to claim 1, characterized in that: The deformation device is a constant-pressure cylinder arranged between the fixed plate and the floating plate.

6. The testing device according to claim 1, characterized in that: The fixed plate is provided with a guide column arranged toward the floating plate and the carrier, the floating plate is provided with a guide hole for the guide column to pass through, the carrier is provided with a guide groove for accommodating the guide column, and the guide column passes through the guide hole and is placed in the guide groove.

7. The testing device according to claim 6, characterized in that: A spring ring is sleeved on the guide column, and the spring ring is respectively in contact with the fixed plate and the floating plate.

8. The testing device according to claim 1, characterized in that: The fixed plate, the floating plate and the carrier are provided with positioning holes, and the positioning structural members pass through the positioning holes of the fixed plate, the floating plate and the carrier respectively, and the two ends of the positioning structural members respectively limit the fixed plate and the carrier.

9. The testing device according to claim 1, characterized in that: The air intake duct is provided with a limiting structure on the outer side of the fixing plate, and the limiting structure abuts against the fixing plate.

10. The testing device according to claim 1, characterized in that: A sealing gasket is arranged on one side of the air intake duct close to the bearing groove.

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