A device for testing an absolute ceramic pressure sensor module

Abstract

The utility model relates to sensor manufacturing technical field, and disclose a kind of equipment for verifying absolute pressure ceramic pressure sensor module, including workbench, the workbench top end is sequentially opened with dye tank, flushing tank, bubbling tank, re-washing tank from left to right, the workbench top end is located at the rear side of dye tank, flushing tank, bubbling tank, re-washing tank is all rotationally connected with the cover, the inner wall of workbench is located at the upper portion of the rear side of dye tank, flushing tank, bubbling tank is all fixedly connected with shunt pipe, the rear end of shunt pipe is all through workbench rear side and is fixedly connected with water pipe, the front end of shunt pipe is respectively through the inner wall of dye tank, flushing tank, bubbling tank and is fixedly connected with faucet.The utility model can verify multiple absolute pressure ceramic pressure sensor modules at a time, effectively screen out defective parts, reduce the screening rate, prevent the outflow of defective parts, save subsequent production cost, and improve the yield of final ceramic pressure sensor finished product.

Description

Technical Field

[0001] This utility model relates to the field of sensor manufacturing technology, specifically to a device for testing absolute pressure ceramic pressure sensor modules. Background Technology

[0002] The ceramic pressure sensor module uses a ceramic substrate and ceramic strain gauge as core components, and forms an integral structure through glass slurry sintering. This design makes full use of the excellent properties of ceramic materials, making it widely used in scenarios with high requirements for environmental adaptability, such as industrial control, automotive electronics, and medical devices.

[0003] Absolute pressure ceramic pressure sensors have an internal cavity that needs to be kept absolutely sealed; otherwise, the pressure sensor output value will be abnormal. Therefore, after the pressure sensor module is sintered, it needs to be inspected to eliminate defective parts.

[0004] In order to effectively screen out defective parts and avoid losses caused by defective parts leaving the factory, this application proposes a device for inspecting absolute pressure ceramic pressure sensor modules. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a device for inspecting absolute pressure ceramic pressure sensor modules, which effectively screens out defective parts, reduces the miss rate, and prevents defective parts from leaving the site.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A device for testing absolute pressure ceramic pressure sensor modules, comprising a workbench, wherein a dye tank, a rinsing tank, a bubbling tank, and a rewashing tank are sequentially provided on the top of the workbench from left to right; a cover is rotatably connected to the top of the workbench at the rear side of the dye tank, rinsing tank, bubbling tank, and rewashing tank; a diversion pipe is fixedly connected to the upper rear side of the inner wall of the workbench at the rear side of the dye tank, rinsing tank, and bubbling tank; the rear end of each diversion pipe passes through the rear side of the workbench and is fixedly connected to a water supply pipe; the front end of each diversion pipe passes through the inner wall of the dye tank, rinsing tank, and bubbling tank respectively and is fixedly connected to a faucet; an air compressor is fixedly connected to the left end of the workbench; an air supply pipe is fixedly connected to the output end of the air compressor; a one-way valve is fixedly connected to the other end of the air supply pipe; the one-way valve is installed on the top of the cover above the dye tank, and its output end passes through the inner wall of the cover.

[0007] Further description: A motor is fixedly connected to the inner wall of the workbench at the middle of the rear side of the rinsing tank. The drive end of the motor passes through the inner wall of the rinsing tank and is fixedly connected to a stirring blade. An isolation cover is fixedly connected to the rear end of the inner wall of the rinsing tank outside the stirring blade. Here, the motor drives the stirring blade to rotate at high speed, and the stirring blade agitates the flow of clean water, thereby contacting the surface of the module to achieve cleaning.

[0008] Further description: A bubbler is fixedly connected to the rear end of the workbench, located behind the bubbling tank. The output end of the bubbler is fixedly connected to a connecting pipe, one end of which extends through to the inner wall of the bubbling tank. Here, the bubbler generates reaction gas, which is then transported through the connecting pipe to the pipe connected inside the bubbling tank.

[0009] Further description: The inner wall of the bubbling tank is provided with a bent tube, one end of which is fixedly connected to the front end of the connecting tube; here, a number of air outlet holes are opened on the surface of the bent tube.

[0010] Further description: A shelf is fixedly connected to the upper right side of the workbench, and a high-pressure water gun is installed inside the shelf; here, the shelf is hook-shaped so that the high-pressure water gun can be placed inside.

[0011] Further description: The input end of the high-pressure water gun is fixedly connected to an elastic tube, and the other end of the elastic tube is fixedly connected to the right end of the water supply pipe; here, the elastic tube is extensible and can extend the range of motion of the high-pressure water gun.

[0012] Further description: The inner wall of the workbench is fixedly connected to a drain pipe on the lower side of the dye tank, rinsing tank, bubbling tank, and rewashing tank. The top of the drain pipe passes through the inner wall of the dye tank, rinsing tank, bubbling tank, and rewashing tank respectively. Here, one end of the drain pipe is connected to a flexible hose to connect to an external sewage tank or an indoor sewage pipe.

[0013] Further description: The rear end of each sewage pipe passes through the rear side of the workbench and is fixedly connected to a main manifold. A solenoid valve is installed on the upper side of the outer wall of each sewage pipe. Here, the solenoid valve is controlled by an electric linkage main control and an external switch module is used to open and close the solenoid valve.

[0014] Beneficial effects:

[0015] 1. In this utility model, multiple absolute pressure ceramic pressure sensor modules can be inspected at one time, effectively screening out defective parts, reducing the screening rate, preventing the outflow of defective parts, saving subsequent production costs, and improving the yield of the final ceramic pressure sensor product.

[0016] 2. In this utility model, with the cooperation of an air compressor, an air supply pipe, and a one-way valve, the absolute pressure ceramic pressure sensor module can pressurize the dye bath during dyeing, thereby dyeing out some tiny cracks, which not only saves dyeing time but also improves dyeing efficiency. Attached Figure Description

[0017] Figure 1 This is a front perspective view of a device for testing an absolute pressure ceramic pressure sensor module according to this utility model.

[0018] Figure 2This is a rear perspective view of a device for testing an absolute pressure ceramic pressure sensor module according to this utility model.

[0019] Figure 3 This is a half-sectional view of the right side of the workbench of the device for testing absolute pressure ceramic pressure sensor modules according to this utility model.

[0020] Figure 4 This is a half-sectional view of the left side of the workbench of the device for testing absolute pressure ceramic pressure sensor modules according to this utility model;

[0021] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0022] In the diagram: 1. Workbench; 2. Cover; 3. Air compressor; 4. Air supply pipe; 5. One-way valve; 6. Dye tank; 7. Rinse tank; 8. Bubble tank; 9. Rewash tank; 10. Shelf; 11. High-pressure water gun; 12. Flexible tube; 13. Water supply pipe; 14. Main manifold; 15. Bubble machine; 16. Drain pipe; 17. Solenoid valve; 18. Connecting pipe; 19. Diverter pipe; 20. Faucet; 21. Motor; 22. Isolation cover; 23. Agitator blade; 24. Bend pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Please see Figures 1-2 , Figure 4A device for testing absolute pressure ceramic pressure sensor modules includes a workbench 1. From left to right, the top of the workbench 1 has a dye tank 6, a rinsing tank 7, a bubbling tank 8, and a rewashing tank 9. A cover 2 is rotatably connected to the rear side of each of the dye tank 6, rinsing tank 7, bubbling tank 8, and rewashing tank 9. A diversion pipe 19 is fixedly connected to the upper rear side of each of the three sections on the inner wall of the workbench 1. The rear end of each diversion pipe 19 passes through the rear side of the workbench 1 and is fixedly connected to a water supply pipe 13. One end of the water supply pipe 13 is connected to an external water tank, and the front end of each diversion pipe 19 passes through… A water tap 20 is fixedly connected to the inner wall of the dye tank 6, rinsing tank 7, and bubbling tank 8. An air compressor 3 is fixedly connected to the left end of the workbench 1. An air supply pipe 4 is fixedly connected to the output end of the air compressor 3. A one-way valve 5 is fixedly connected to the other end of the air supply pipe 4. The one-way valve 5 is installed on the top of the cover 2 on the upper side of the dye tank 6, and its output end penetrates the inner wall of the cover 2. A motor 21 is fixedly connected to the inner wall of the workbench 1 at the middle of the rear side of the rinsing tank 7. The drive end of the motor 21 penetrates the inner wall of the rinsing tank 7 and is fixedly connected to the stirring blade 23. An isolation cover 22 is fixedly connected to the rear end of the inner wall of the rinsing tank 7 outside the stirring blade 23.

[0026] To explain further, first, turn on the tap 20 of the dye tank 6, inject an appropriate amount of clean water and mix it thoroughly with the red dye to make a dyeing solution for testing. Then, completely immerse the module to be tested into the dye tank 6, cover it with the cap 2 to form a sealed space, and then start the air compressor 3. The compressed air is delivered to the dye tank 6 through the air supply pipe 4. The one-way valve 5 automatically blocks the gas backflow to maintain a stable pressure in the tank. During the dyeing process, the dye seeps into the interior through any cracks or sintering defects that may exist in the module.

[0027] After dyeing is completed, turn on the water tap 20 of the rinsing tank 7 to fill with water, transfer the dyeing module to the rinsing tank 7, start the motor 21 to drive the stirring blade 23 to rotate, and use the water flow impact to remove most of the dye from the surface of the module.

[0028] Example 2

[0029] Please see Figure 3 , Figure 5Further, based on Embodiment 1, a bubbler 15 is fixedly connected to the rear end of the workbench 1 behind the bubble tank 8. A connecting pipe 18 is fixedly connected to the output end of the bubbler 15, with one end extending through to the inner wall of the bubble tank 8. A bent pipe 24 is provided on the inner wall of the bubble tank 8, with one end fixedly connected to the front end of the connecting pipe 18. A shelf 10 is fixedly connected to the upper right side of the workbench 1. A high-pressure water gun 11 is provided inside the shelf 10. The input end of the high-pressure water gun 11... An elastic tube 12 is fixedly connected, and the other end of the elastic tube 12 is fixedly connected to the right end of the water supply pipe 13. The inner wall of the workbench 1 is fixedly connected to the lower side of the dye tank 6, rinsing tank 7, bubbling tank 8, and rewashing tank 9. The top end of the drain pipe 16 passes through the inner wall of the dye tank 6, rinsing tank 7, bubbling tank 8, and rewashing tank 9 respectively. The rear end of the drain pipe 16 passes through the rear side of the workbench 1 and is fixedly connected to the main manifold 14. Solenoid valves 17 are installed on the upper side of the outer wall of the drain pipe 16.

[0030] To further explain, after the initial rinsing, the module is moved to the bubble tank 8, and the bubble machine 15 is turned on. Dense bubbles are generated through multiple air outlets of the bent pipe 24. With the help of the micro force generated by the bursting of bubbles, residual dye in the gaps is further removed. Then, the module is placed in the rewash tank 9, and a high-pressure water gun 11 is used manually for fine rinsing to ensure that the dye in every corner is completely removed.

[0031] After cleaning, the external switch module is used to open each solenoid valve 17, allowing the sewage to flow into the main manifold 14 along the drain pipe 16 and be discharged into the external sewage pool. Finally, the module is sent into the oven to dry and then placed under a strong light source for visual inspection. If staining marks appear inside the module, it indicates that there are cracks or poor sintering problems, and it needs to be scrapped.

[0032] Working principle: First, open the water tap 20 in the dye tank 6 to inject a certain amount of clean water into the dye tank 6 and mix it with red dye. Then, place the module to be inspected into the dye tank 6, ensuring that the module is completely immersed. Then, cover it with the cap 2, start the air compressor 3 to compress the air, and deliver it to the dye tank 6 along the air supply pipe 4, creating pressure inside the dye tank 6. The one-way valve 5 prevents air backflow. After dyeing for a period of time, open the water tap 20 in the rinsing tank 7 and add clean water. Then, move the dyed module into the rinsing tank 7, and start the motor 21 to drive the stirring blade 23 to rotate, agitating the clean water in the rinsing tank 7. The water flow generated by the agitation will perform preliminary cleaning of the module, removing most of the dye. The pre-cleaned modules are then moved to the bubbling tank 8. The bubbling machine 15 is started, and with the help of multiple air vents on the surface of the bent pipe 24, the water soaking the modules creates a bubbling effect, completing the cleaning of the modules. They are then moved to the rewashing tank 9, where high-pressure water guns 11 are used to rinse the modules to ensure that all modules are clean. After cleaning, all solenoid valves 17 are opened, so that the wastewater in the tank is discharged into the main manifold 14 through the drain pipe 16, and then discharged into the external sewage pool through the main manifold 14. Finally, the dyed and cleaned modules are placed in an oven to dry, and then placed under a strong light source to observe whether there is dye inside the module cavity. If there is dye, it proves that the module has cracks or poor sintering, causing the dye to seep into the module cavity, and the module is scrapped.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for testing absolute pressure ceramic pressure sensor modules, comprising a workbench (1), characterized in that: The top of the workbench (1) is provided with a dye tank (6), a rinsing tank (7), a bubbling tank (8), and a rewashing tank (9) from left to right. The top of the workbench (1) is rotatably connected to the rear side of the dye tank (6), rinsing tank (7), bubbling tank (8), and rewashing tank (9). The inner wall of the workbench (1) is fixedly connected to the upper rear side of the dye tank (6), rinsing tank (7), and bubbling tank (8) with a diversion pipe (19). The rear end of the diversion pipe (19) passes through the rear side of the workbench (1) and is fixed. A water supply pipe (13) is connected. The front end of the diversion pipe (19) passes through the inner wall of the dye tank (6), the rinsing tank (7), and the bubbling tank (8) and is fixedly connected to a faucet (20). An air compressor (3) is fixedly connected to the left end of the workbench (1). An air supply pipe (4) is fixedly connected to the output end of the air compressor (3). A one-way valve (5) is fixedly connected to the other end of the air supply pipe (4). The one-way valve (5) is installed on the top of the cover (2) on the upper side of the dye tank (6), and its output end passes through the inner wall of the cover (2).

2. The device for testing an absolute pressure ceramic pressure sensor module according to claim 1, characterized in that: A motor (21) is fixedly connected to the inner wall of the workbench (1) at the middle of the rear side of the rinsing tank (7). The driving end of the motor (21) passes through the inner wall of the rinsing tank (7) and is fixedly connected to a stirring blade (23). An isolation cover (22) is fixedly connected to the rear end of the inner wall of the rinsing tank (7) outside the stirring blade (23).

3. The device for testing an absolute pressure ceramic pressure sensor module according to claim 1, characterized in that: The workbench (1) is fixedly connected to a bubble machine (15) at the rear end of the bubble tank (8). The output end of the bubble machine (15) is fixedly connected to a connecting pipe (18), and one end of the pipe extends through to the inner wall of the bubble tank (8).

4. The device for testing an absolute pressure ceramic pressure sensor module according to claim 1, characterized in that: The inner wall of the bubbling groove (8) is provided with a bent tube (24), one end of which is fixedly connected to the front end of the connecting tube (18).

5. The device for testing an absolute pressure ceramic pressure sensor module according to claim 1, characterized in that: A shelf (10) is fixedly connected to the upper right side of the workbench (1), and a high-pressure water gun (11) is provided inside the shelf (10).

6. The device for testing an absolute pressure ceramic pressure sensor module according to claim 5, characterized in that: The input end of the high-pressure water gun (11) is fixedly connected to an elastic tube (12), and the other end of the elastic tube (12) is fixedly connected to the right end of the water supply pipe (13).

7. The device for testing an absolute pressure ceramic pressure sensor module according to claim 1, characterized in that: The inner wall of the workbench (1) is fixedly connected to the drain pipe (16) on the lower side of the dye tank (6), rinsing tank (7), bubbling tank (8), and rewashing tank (9). The top of the drain pipe (16) passes through the inner wall of the dye tank (6), rinsing tank (7), bubbling tank (8), and rewashing tank (9).

8. The device for testing an absolute pressure ceramic pressure sensor module according to claim 7, characterized in that: The rear end of each sewage pipe (16) passes through the rear side of the workbench (1) and is fixedly connected to a main manifold (14). Each sewage pipe (16) is equipped with a solenoid valve (17) on the upper side of its outer wall.

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