Air pressure sensor testing system

Abstract

The utility model provides an air pressure sensor testing system, which comprises a temperature control module, a positioning module, a pressurizing module and a driving module, the pressurizing module is fixedly arranged on the positioning module, an air pressure sensor is arranged between the temperature control module and the positioning module, and the air pressure sensor is pressed on the temperature control module by the pressurizing module. The temperature control module, the positioning module and the pressurizing module are all driven by the driving module; the temperature control module comprises a pipe body and a heat exchange body circularly flowing in the pipe body, the pipe body is embedded in the plate body, and the air pressure sensor is tightly attached to the plate body. According to the utility model, the boss arranged on the temperature control module is tightly attached to the independent air pressure sensor so as to provide an aging environment for the air pressure sensor, batch evaluation test is carried out on the air pressure sensor through the pressurization module and the driving module, and the pipe body arranged in the temperature control module can ensure the balance of the temperature of each part of the temperature control module. Therefore, the barometric sensor can be evaluated and tested in the same aging environment.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensor calibration, in particular to an air pressure sensor testing system. Background Art

[0002] A pressure sensor is an instrument for measuring gas pressure. The pressure sensor involved in the utility model is an integrated gauge pressure sensor with an air nozzle. This series of products uses high-performance signal conditioning chips to calibrate and compensate for the temperature and pressure of the advanced MEMS piezoresistive core, ensuring the excellent performance and reliability of the product while integrating the two chips into a package. The packaging form with an air nozzle is convenient for customers to weld and use, and is suitable for differential pressure detection of non-corrosive gases that are compatible with the structural materials of pressure-sensitive elements. It is particularly suitable for non-contact liquid level detection in household appliances, small household appliances, medical care and other fields.

[0003] During testing, each gauge pressure sensor needs to be connected with an air pipe to provide pressure for each sensor module separately. In the prior art, a multimeter is generally used to test products one by one, resulting in low test efficiency and the need to constantly adjust the air source, shortening the life of the pressure controller.

[0004] The current aging methods are basically non-contact, where the product is installed in the socket and then placed in a temperature chamber for aging. In the existing technology, the socket, circuit and PCB aging board connected to the product are all aged at the same temperature in the temperature chamber, which causes great damage to the entire circuit and PCB board. If a temperature chamber is not used, it is difficult to apply the same aging environment to each product in the batch test. Each product needs to undergo a separate aging test process for a socket, and batch testing cannot be completed. The production cost is high, the space utilization rate is low, and the production capacity of the entire equipment is low. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the defects of the prior art. The utility model proposes a pressure sensor testing system to provide a temperature and pressure environment for the sensor, thereby realizing temperature and pressure calibration and compensation thereof.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pressure sensor testing system, comprising a temperature control module, a positioning module, a pressurizing module and a driving module, wherein the pressurizing module is fixedly arranged on the positioning module, the pressure sensor is arranged between the temperature control module and the positioning module, the pressure sensor is pressed onto the temperature control module by the pressurizing module, and the temperature control module, the positioning module and the pressurizing module are all driven by the driving module;

[0007] The temperature control module includes a tube body and a heat exchanger circulating in the tube body. The tube body is embedded in a plate body, and the air pressure sensor is tightly fitted to the plate body.

[0008] Furthermore, the positioning module includes a lifting component and a movable component mounted on the temperature control module, and the lifting component is driven by the movable component to reciprocate vertically.

[0009] Furthermore, the lifting assembly includes a guide rail assembly and a lifting plate fixedly arranged vertically on the temperature control module, the pressurizing module is movably arranged on the lifting plate, and the pressurizing module penetrates the lifting plate and contacts the air pressure sensor.

[0010] Furthermore, the guide rail assembly includes a supporting side plate vertically fixed on the temperature control module and a lifting guide rail fixed on the supporting side plate, and the lifting plate is movably arranged on the lifting guide rail via a slider.

[0011] Furthermore, the pressurizing module includes a sealing plate and an air pipe assembly embedded in the sealing plate, and each of the air pipe assemblies and each of the air pressure sensors are located on the same axis;

[0012] A plurality of limiting structures are fixedly arranged on the upper surface perpendicular to the lifting plate. The limiting structures penetrate the thickness direction of the sealing plate. A compression spring is also arranged between the sealing plate and the lifting plate.

[0013] Furthermore, a breakaway spring is also provided in the air pipe assembly, and the breakaway spring can penetrate the thickness direction of the lifting plate and come into close contact with the upper end surface of the air pressure sensor.

[0014] Furthermore, a plurality of sealing rubber rings are fixedly arranged inside the lifting plate, and the sealing rubber rings and the air pressure sensor are located on the same axis.

[0015] Furthermore, the movable assembly includes a lifting side plate, the lifting side plate is fixedly arranged on the sealing plate, and an inclined groove is opened on the lifting side plate;

[0016] It also includes an electric cylinder and an electric cylinder connecting plate. A roller is movably fixed to the edge of the electric cylinder connecting plate. The roller is embedded in the inclined groove. The electric cylinder connecting plate can reciprocate along the moving direction of the electric cylinder.

[0017] Furthermore, the driving module includes a PCB board and a probe board which are fixed to the bottom side of the lifting board in sequence, and the PCB board is regulated by the driving board.

[0018] Furthermore, a tray lifting plate for supporting the tray is fixedly provided on the supporting side plate, and embedding grooves for placing the air pressure sensor are evenly arranged on the tray lifting plate, and the tray is located above the temperature control module.

[0019] Compared with the prior art, the beneficial effects of the utility model include:

[0020] 1) A temperature control module is provided and a boss is provided on the temperature control module to closely fit with a separate air pressure sensor to provide an aging environment for the air pressure sensor. At the same time, a batch evaluation test of the air pressure sensor is performed by a pressurizing module and a driving module. The tube body provided in the temperature control module can ensure the temperature balance of each part of the temperature control module, and ensure that the air pressure sensor on the temperature control module completes the evaluation test under the same aging environment;

[0021] 2) By using elastic components such as compression springs and guide rails, the sealing plate, lifting plate and tray are stacked or lifted in a certain order. After the air pressure sensor and the temperature control module are in close contact, the pressure module presses the air pressure sensor against the temperature control module from above, and exits in the opposite order after the test is completed, ensuring the continuity and test efficiency of the overall evaluation test process, and effectively reducing the frequency of manual participation in the test process;

[0022] 3) By providing a disengagement spring, a sealing rubber ring and a sealing plate, on the one hand, the sealing of the air pressure sensor during the pressurization process can be guaranteed, and on the other hand, the fixed state of the air pressure sensor between the lifting plate and the tray can be guaranteed. The setting of the disengagement spring can effectively prevent the air pressure sensor from being lifted up from the tray by the sealing rubber ring when it is disengaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0024] Figure 1 The overall structure of the air pressure sensor test system is schematically shown;

[0025] Figure 2 The perspective structure of the temperature control module is schematically shown;

[0026] Figure 3 The schematic diagram shows the main structure of the air pressure sensor test system;

[0027] Figure 4 The schematic diagram shows the arrangement of the air pressure sensor on the tray;

[0028] Figure 5The schematic diagram shows a partial enlarged structure of the internal area of ​​the air pressure sensor test system;

[0029] Numbers in the figure: 1-plate body, 2-tube body, 3-bump, 4-lifting plate, 5-support side plate, 6-lifting guide rail, 7-first slider, 8-second slider, 9-sealing plate, 10-limiting structure, 11-compression spring, 12-disengagement spring, 13-trachea joint, 14-boss, 15-sealing rubber ring, 16-lifting side plate, 17-slanted groove, 18-electric cylinder connecting plate, 19-roller, 20-PCB board, 21-probe board, 22-driving board, 23 tray, 24-tray lifting plate. DETAILED DESCRIPTION

[0030] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction to the technical solution of the utility model.

[0031] Figure 1 The overall structure of the air pressure sensor test system is schematically shown. Figure 1 As shown, it includes a temperature control module, a positioning module, a pressurizing module and a driving module. The pressurizing module is fixedly arranged on the positioning module, and the air pressure sensor is arranged between the temperature control module and the positioning module. The air pressure sensor is pressed onto the temperature control module by the pressurizing module. The temperature control module, the positioning module and the pressurizing module are all driven by the driving module. The temperature control module provides an aging environment for the air pressure sensor, and the pressurizing module and the driving module complete the calibration process of the air pressure sensor. Figure 2 The schematic diagram shows the perspective structure of the temperature control module. Figure 2 The temperature control module shown includes a tube body 2 and a heat exchanger circulating in the tube body 2 . The tube body 2 is covered by a plate body 1 . The air pressure sensor is in close contact with the temperature control module.

[0032] Figure 3 The schematic diagram shows the main structure of the air pressure sensor test system, combined with Figure 3 The positioning module is described in detail. The positioning module includes a lifting component and a movable component mounted on the temperature control module, and the lifting component is driven by the movable component to reciprocate in the vertical direction.

[0033] like Figure 3As shown, the aforementioned lifting assembly includes a guide rail assembly and a lifting plate 4 vertically fixed on the temperature control module. The guide rail assembly includes a supporting side plate 5 vertically fixed on the temperature control module and a lifting rail 6 fixed on the supporting side plate 5. A sliding block is movably fixed on the guide rail. The lifting plate 4 is fixed on the sliding block. The lifting plate 4 moves up and down by the axial movement of the sliding block along the lifting rail 6. The pressurizing module is movably arranged on the aforementioned lifting plate 4. Through the movement of the lifting plate 4 by the lifting rail 6, the pressurizing module can switch to a state close to the air pressure sensor or away from the air pressure sensor, providing conditions for pressurizing different batches of air pressure sensors.

[0034] Figure 4 The schematic diagram shows the arrangement of the air pressure sensor on the tray. Figure 4 As shown, the aforementioned air pressure sensor is placed on the tray 23, and the tray 23 is evenly arranged with embedded grooves for placing the air pressure sensor. The tray 23 is fixed on the supporting side plate 5 through the tray lifting plate 24. In some embodiments, the tray lifting plate 24 is fixed on the supporting side plate 5 in a movable fixing manner, that is, by fixing the tray lifting plate 24 on a slider that can reciprocate along the axial direction of the lifting guide rail 6, and by adjusting the distance between the tray lifting plate 24 and the lifting plate 4, the air pressure sensor can maintain a certain distance from the positioning module to complete the calibration test.

[0035] Figure 5 The schematic diagram shows a partial enlarged structure of the internal area of ​​the air pressure sensor test system. In some embodiments, the Figure 5 As shown, the above-mentioned slider is used as the first slider 7, a second slide rail is fixedly arranged on the side of the lifting plate 4 facing the lifting guide rail 6, and a second slider 8 is movably fixed thereon, and the tray lifting plate 24 is fixedly arranged on the second slider 8, that is, the tray lifting plate 24 can reciprocate vertically to a certain extent. After being arranged in this way, the lifting plate 4 can reciprocate vertically under the action of the first slider 7. In the process of the lifting plate 4 moving toward the direction close to the temperature control module, the tray lifting plate 24 is under the action of gravity, so that the second slider 8 is always located at the lowermost end of the second slide rail, and the distance between the lifting plate 4 and the tray 23 is constant at this time; in the state of continuous falling, the tray 23 and the tray lifting plate 24 first contact the temperature control module located on the bottom side, but at this time the lifting plate 4 is still moving downward to get close to the tray 23, and at this time the second slider 8 slides upward compared to the second slide rail until the lifting plate 4 is pressed to the upper end of the air pressure sensor located above the tray 23, that is, the initial movement of the lifting plate 4 is completed.

[0036] Combination Figure 5The pressurizing module is described in detail. The pressurizing module is movably arranged on the lifting plate 4. The pressurizing module passes through the aforementioned lifting plate 4 and contacts the air pressure sensor. It includes a sealing plate 9 and an air pipe assembly embedded in the sealing plate 9. Each air pipe assembly and each air pressure sensor are located on the same axis, which is convenient for providing calibration test conditions for the air pressure sensor. The aforementioned air pipe assembly includes an air pipe joint 13 and a boss 14. The connection between the air pipe joint 13 and the boss 14 is located in the sealing plate 9. It also includes a breakaway spring 12. One end of the breakaway spring 12 is embedded in the aforementioned boss 14, and the other end faces the air pressure sensor. It is worth mentioning that a sealing rubber ring 15 is also fixedly provided in the aforementioned lifting plate 4, and the sealing rubber ring 15 and the air pressure sensor are also located on the same axis. In the process of the lifting plate 4 approaching the air pressure sensor, the other end of the spring 12 first contacts the upper end surface of the air pressure sensor, and then the sealing rubber ring 15 is sleeved on the periphery of the air pressure sensor to complete the fixation and sealing of the air pressure sensor, and then the air pressure environment is provided for the air pressure sensor through the air pipe joint 13.

[0037] During the aforementioned process, the sealing plate 9 can be close to the lifting plate 4, and a number of limiting structures 10 are fixedly arranged perpendicular to the upper surface of the lifting plate 4. The limiting structure 10 can be a limiting screw or a limiting column. The utility model is not limited thereto. It only needs to be able to realize the limiting function and fix the maximum distance between the sealing plate 9 and the lifting plate 4. The sealing plate 9 is limited to move back and forth in the vertical direction by the limiting structure 10, so that the trachea joint 13 and the boss 14 can always be on the same axis with the sealing rubber ring 15 and the air pressure sensor. A compression spring 11 is arranged between the sealing plate 9 and the lifting plate 4. The sealing plate 9 is driven by the movable component to drive the lifting plate 4 to move downward and complete the pressurization process of the air pressure sensor. During the process, due to the existence of the compression spring 11, the sealing rubber ring 15 can first complete the sealing of the upper end of the air pressure sensor, and then the disengagement spring 12 can be used to further compress the air pressure sensor. After the test is completed, due to the action of the compression spring 11, the lifting plate 4 first drives the sealing rubber ring 15 to disengage from the air pressure sensor, and then disengages from the disengagement spring 12 fixed in the boss 14, so as to prevent the sealing rubber ring 15 from lifting the air pressure sensor located on the tray 23 due to the lifting of the lifting plate 4.

[0038] Combination Figure 1The movable component is described in detail. The movable component includes a lifting side plate 16, which is fixedly arranged on the sealing plate 9. The position of the sealing plate 9 can be adjusted by adjusting the position of the lifting side plate 16, and the position of the lifting plate 4 can be further controlled. Therefore, in order to facilitate the adjustment of the position of the lifting side plate 16, an inclined groove 17 is provided on the lifting side plate 16, and a roller 19 is movably fixed on the side of the electric cylinder connecting plate 18, and the roller 19 is embedded in the aforementioned inclined groove 17, and the electric cylinder connecting plate 18 is adjusted by the electric cylinder, so that its horizontal position changes compared with the lifting side plate 16. Due to the existence of the inclined groove 17 and the roller 19, the lifting side plate 16 can realize reciprocating motion along a certain distance in the vertical direction during the movement of the electric cylinder connecting plate 18, thereby realizing the relative vertical position adjustment of the sealing plate 9, the lifting plate 4 and the pallet lifting plate 24. Furthermore, in order to save space for the overall test system, in some embodiments, a mounting plate is provided parallel to the temperature control module, and the mounting plate, the support plate and the temperature control module form a square frame. An electric cylinder and a guide rail are fixedly provided on the top side of the mounting plate, and the electric cylinder connecting plate 18 is movably provided on the guide rail with a slider, and performs a certain degree of reciprocating motion along the length direction of the mounting plate under the action of the electric cylinder. During this process, the electric cylinder connecting plate 18 moves along the length direction of the guide rail mounting plate, and its relative lateral position with the lifting side plate 16 changes. Under the action of the inclined groove 17 and the roller 19, the vertical position of the lifting side plate 16 is adjusted, so that the vertical positions of the sealing plate 9, the lifting plate 4 and the tray lifting plate 24 are changed.

[0039] Combination Figure 1 and Figure 5 , the aforementioned driving module includes a PCB board 20 and a probe board 21 fixed to the bottom side of the lifting plate 4 in sequence, the air pressure sensor and the PCB board 20 are connected through the probe board 21, and the air pressure sensor penetrates the aforementioned PCB board 20 and the thickness direction of the probe board 21 and is in close contact with the lower surface of the boss 14. The aforementioned PCB board 20 can be connected to the driving board 22 through a socket, and the air pressure sensor is powered by the driving board 22 and the PCB board 20. The output data of the air pressure sensor is collected by the instrument, and different temperature conditions can be applied to the air pressure sensor by the temperature control module, and different air pressure conditions can be applied to the air pressure sensor by the pressurization module. Finally, different power-on voltages are applied to the air pressure sensor by the driving board 22 and the PCB board 20, thereby completing the calibration test. And in order to facilitate the temperature control module to provide temperature conditions for a separate air pressure sensor, a bump 3 can be arranged on the side of the temperature control module facing the tray 23, which is used to correspond to the air pressure sensor located on the tray 23. When the tray 23 approaches the temperature control module, the bump 3 can contact the bottom of the air pressure sensor.

[0040] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A pressure sensor testing system, characterized in that: It includes a temperature control module, a positioning module, a pressurizing module and a driving module, wherein the pressurizing module is fixedly arranged on the positioning module, the air pressure sensor is arranged between the temperature control module and the positioning module, the air pressure sensor is pressed onto the temperature control module by the pressurizing module, and the temperature control module, the positioning module and the pressurizing module are all driven by the driving module; The temperature control module comprises a tube body (2) and a heat exchanger circulating in the tube body (2); the tube body (2) is embedded in the plate body (1); and the air pressure sensor is tightly fitted to the plate body (1).

2. The air pressure sensor testing system according to claim 1, characterized in that: The positioning module comprises a lifting component and a movable component mounted on the temperature control module, and the lifting component is driven by the movable component to reciprocate vertically.

3. The air pressure sensor testing system according to claim 2, characterized in that: The lifting assembly comprises a guide rail assembly and a lifting plate (4) which are fixedly arranged vertically on the temperature control module, and the pressurizing module is movably arranged on the lifting plate (4), and the pressurizing module penetrates the lifting plate (4) and contacts the air pressure sensor.

4. The air pressure sensor testing system according to claim 3, characterized in that: The guide rail assembly comprises a supporting side plate (5) fixed vertically on the temperature control module and a lifting guide rail (6) fixed on the supporting side plate (5), and the lifting plate (4) is movably arranged on the lifting guide rail (6) by means of a slider.

5. The air pressure sensor testing system according to claim 3, characterized in that: The pressurizing module comprises a sealing plate (9) and an air pipe assembly embedded in the sealing plate (9), and each of the air pipe assemblies and each of the air pressure sensors are located on the same axis; A plurality of limiting structures (10) are fixedly arranged on the upper surface perpendicular to the lifting plate (4), and the limiting structures (10) penetrate the thickness direction of the sealing plate (9). A compression spring (11) is also arranged between the sealing plate (9) and the lifting plate (4).

6. The air pressure sensor testing system according to claim 5, characterized in that: A breakaway spring (12) is also provided in the air pipe assembly, and the breakaway spring (12) can penetrate the thickness direction of the lifting plate (4) and come into close contact with the upper end surface of the air pressure sensor.

7. The air pressure sensor testing system according to claim 3, characterized in that: A plurality of sealing rubber rings (15) are fixedly arranged inside the lifting plate (4), and the sealing rubber rings (15) and the air pressure sensor are located on the same axis.

8. The air pressure sensor testing system according to claim 5, characterized in that: The movable component comprises a lifting side plate (16), the lifting side plate (16) is fixedly arranged on the sealing plate (9), and an inclined groove (17) is opened on the lifting side plate (16); It also includes an electric cylinder and an electric cylinder connecting plate (18), a roller (19) is movably fixed on the edge of the electric cylinder connecting plate (18), the roller (19) is embedded in the inclined groove (17), and the electric cylinder connecting plate (18) can reciprocate along the moving direction of the electric cylinder.

9. The air pressure sensor testing system according to claim 3, characterized in that: The driving module comprises a PCB board (20) and a probe board (21) which are fixed in sequence to the bottom side of the lifting plate (4); the PCB board (20) is regulated by a driving board (22).

10. The air pressure sensor testing system according to claim 4, characterized in that: A tray lifting plate (24) for supporting the tray (23) is also fixedly arranged on the supporting side plate (5), and embedding grooves for placing air pressure sensors are evenly arranged on the tray lifting plate (24), and the tray (23) is located above the temperature control module.

Images