A differential pressure sensor testing fixture

Abstract

This utility model relates to a differential pressure sensor testing fixture, comprising: a substrate; a limiting assembly; a pin assembly, the pin assembly including a first guide unit mounted on the upper surface of the substrate and corresponding to a first clearance notch, a pin carrier plate unit slidably mounted on the first guide unit, a test pin mounted on the pin carrier plate unit, and a first actuating unit mounted on the upper surface of the substrate and connected to the pin carrier plate unit to drive its movement; and a sealing assembly. The limiting assembly can limit the differential pressure sensor, and the pin assembly and sealing assembly, in conjunction with the differential pressure sensor, can be used to connect an external voltage testing device and a leakage testing device. The fixture is simple in structure, cost-effective, and easy to operate.

Description

Technical Field

[0001] This utility model belongs to the field of chip testing technology and relates to a differential pressure sensor testing fixture. Background Technology

[0002] Differential pressure sensor core testing fixtures are essential devices in differential pressure sensor core testing. The quality of the fixture design determines the accuracy and efficiency of differential pressure sensor core testing.

[0003] Chinese invention patent application number 202211429771.3 discloses a differential pressure sensor core testing fixture and its testing method. The method involves installing the differential pressure sensor core between an upper mounting slot and a lower mounting slot of the fixture, and then tightening the upper and lower mounting slots to ensure the sensor core is in a locked state. Test gas at a set pressure is then injected through an air inlet on the outside of the fixture to test the sensor core and obtain the test results. This application uses the upper and lower mounting slots to lock the differential pressure sensor core, and has interconnected vent holes and guide holes inside the upper and lower mounting slots, allowing the tester to simultaneously test multiple differential pressure sensor cores after injecting test gas into the air inlet. However, this differential pressure sensor core testing fixture has a complex structure and high cost. Utility Model Content

[0004] The purpose of this invention is to provide a differential pressure sensor testing fixture to overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a differential pressure sensor testing fixture, comprising:

[0006] substrate;

[0007] A limiting component, comprising a base mounted on the upper surface of the substrate and having a limiting groove formed on its top, and a limiting barrier mounted on the top of the base, the limiting barrier having a limiting through hole corresponding to the limiting groove, a first clearance notch connected to the limiting through hole being formed on one side of the limiting barrier, and at least one second clearance notch connected to the limiting through hole being formed on the other side of the limiting barrier.

[0008] The pin assembly includes a first guide unit mounted on the upper surface of the substrate and corresponding to the first clearance notch, a pin carrier plate unit slidably mounted on the first guide unit, a test pin mounted on the pin carrier plate unit, and a first actuating unit mounted on the upper surface of the substrate and connected to the pin carrier plate unit to drive its movement.

[0009] A sealing assembly, comprising a second guide unit mounted on the upper surface of the substrate and corresponding to the second clearance notch, a tracheal carrier plate slidably mounted on the second guide unit, a test tracheal tube mounted on the tracheal carrier plate, and a second actuating unit mounted on the upper surface of the substrate and connected to the tracheal carrier plate to move it.

[0010] Ideally, the limiting barrier forms a finger avoidance groove at the limiting through hole.

[0011] Furthermore, the first guide unit includes a first limiting vertical plate mounted on the upper surface of the substrate, multiple first guide rods mounted between the first limiting vertical plate and the base, and multiple first guide sleeves that are correspondingly sleeved on the first guide rods and are slidable.

[0012] Furthermore, the pin carrier unit includes a carrier plate through which multiple first guide rods pass and connected to multiple first guide sleeves, and an adapter block mounted on the carrier plate, wherein the test pin is mounted on the adapter block.

[0013] Furthermore, the first actuating unit includes a first pad mounted on the upper surface of the substrate, a first support frame mounted on the first pad, a first limiting sleeve mounted on the first support frame, a first moving rod inserted into the first limiting sleeve, a first adapter plate mounted on one end of the first moving rod and connected to the carrier plate, a first mounting seat mounted on the first support frame, a first connecting arm pivotally connected at one end to the other end of the first moving rod, and a first L-shaped lever pivotally connected to the first mounting seat and pivotally connected to the other end of the first connecting arm.

[0014] Furthermore, the second guide unit includes a second limiting vertical plate mounted on the upper surface of the substrate, multiple second guide rods mounted between the second limiting vertical plate and the base, and multiple second guide sleeves that are correspondingly sleeved on the second guide rods and are slidable.

[0015] Furthermore, the tracheal carrier plate has a slot for installing the test tracheal tube, and a sealing gasket that mates with the test tracheal tube is provided in the slot. The tracheal carrier plate also has an air inlet corresponding to the slot.

[0016] Furthermore, the second actuating unit includes a pad mounted on the upper surface of the substrate, a second support frame mounted on the pad, a second limiting sleeve mounted on the second support frame, a second moving rod inserted into the second limiting sleeve, a second adapter plate mounted on one end of the second moving rod, multiple support rods mounted between the second adapter plate and the tracheal carrier plate, a second mounting seat mounted on the pad, a second connecting arm pivotally connected at one end to the other end of the second moving rod, and a second L-shaped lever pivotally connected to the second mounting seat and pivotally connected to the other end of the second connecting arm.

[0017] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The differential pressure sensor testing fixture of this utility model, by setting a matching limiting component, a pin component and a sealing component, can limit the differential pressure sensor by using the limiting component, and use the pin component and the sealing component in conjunction with the differential pressure sensor to connect an external voltage testing device and a leakage testing device. It has a simple structure, low cost and convenient operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the differential pressure sensor testing fixture of this utility model. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0020] like Figure 1 The differential pressure sensor test fixture shown mainly includes a base plate 1, a limiting component 2, a pin assembly 3, and a sealing component 4.

[0021] The limiting component 2 includes a base 21 mounted on the upper surface of the substrate 1 and having a limiting groove 211 on its top, and a limiting barrier 22 mounted on the top of the base 21. The limiting barrier 22 has a limiting through hole 221 corresponding to the limiting groove 211. One side of the limiting barrier 22 has a first clearance notch 223 communicating with the limiting through hole 221, and the other side has at least one second clearance notch 224 communicating with the limiting through hole 221. Specifically, the limiting barrier 22 is generally square. The limiting through hole 221 and the limiting barrier 22 together limit the differential pressure sensor placed there, ensuring that it will not shake or shift during testing. The first clearance notch 223 corresponds to the pin assembly 3 and is used for the introduction of the pin assembly 3; the second clearance notch 224 corresponds to the sealing component 4 and is used to cooperate with the sealing component 4 to clamp the sensor nozzle.

[0022] In this embodiment, the limiting barrier 22 forms a finger avoidance groove 222 at the limiting through hole 221, that is, a side wall of the limiting through hole 221 is recessed to form a finger avoidance groove 222, thereby facilitating the operator to pick up and put down the differential pressure sensor.

[0023] The pin assembly 3 includes a first guide unit mounted on the upper surface of the substrate 1 and corresponding to the first clearance notch 223, a pin carrier plate unit 34 slidably mounted on the first guide unit, a test pin 30 mounted on the pin carrier plate unit 34, and a first actuating unit 35 mounted on the upper surface of the substrate 1 and connected to the pin carrier plate unit 34 to drive its movement.

[0024] Specifically, the first guide unit includes a first limiting vertical plate 31 installed on the upper surface of the substrate 1 (the first limiting vertical plate 31 is spaced apart from the base 21), a plurality of first guide rods 32 installed between the first limiting vertical plate 31 and the base 21 (two rods in this application, the first guide rods 32 being perpendicular to the first limiting vertical plate 31), and a plurality of first guide sleeves 33 that are correspondingly sleeved on the first guide rods 32 and are slidable (i.e., the first guide sleeves 33 are correspondingly sleeved on the first guide rods 32, so that they can slide on the first guide rods 32 under the action of external force). The pin carrier unit 34 includes a carrier plate 341 (the carrier plate 341 is perpendicular to the first guide rods 32, so that the carrier plate 341 can slide on the first guide rods 32 under the action of external force) and an adapter block 342 mounted on the carrier plate 341. The test pin 30 is mounted on the adapter block 342 (the test pin 30 is externally connected to a conventional voltage testing device via a cable).

[0025] The first actuating unit 35 can be a conventional one, as long as it enables the carrier plate 341 to move relative to the base 21; preferably, it includes a first pad 351 mounted on the upper surface of the substrate 1, a first support frame 352 mounted on the first pad 351, a first limiting sleeve 353 mounted on the first support frame 352 (the first support frame 352 and the first limiting sleeve 353 are preferably integrally connected), a first moving rod 354 inserted in the first limiting sleeve 353 (the first moving rod 354 can move relative to the first limiting sleeve 353 under the action of external force), and a mounting on the first moving rod. The system comprises a first adapter plate 355 connected to the carrier plate 341 at one end of the first moving rod 354 (so that when the first moving rod 354 moves, the carrier plate 341 can be moved closer to or away from the base 21 simultaneously), a first mounting base 356 mounted on the first support frame 352, a first connecting arm 357 pivotally connected at one end to the other end of the first moving rod 354 (in this application, there are two first connecting arms 357, which are spaced apart on both sides of the first moving rod 354), and a first L-shaped lever 358 pivotally connected to the first mounting base 356 and pivotally connected to the other end of the first connecting arm 357. When the first L-shaped lever 358 is manually operated, the first moving rod 354 can be moved, thereby causing the carrier plate 341 to move closer to or away from the base 21. When the carrier plate 341 is close to the base 21, the pin 30 can be inserted into the differential pressure sensor placed in the limiting through hole 221, thereby connecting the differential pressure sensor to the voltage testing device for voltage testing.

[0026] The sealing assembly 4 includes a second guide unit mounted on the upper surface of the substrate 1 and corresponding to the second clearance notch 224, a tracheal carrier plate 43 slidably mounted on the second guide unit, a test trachea mounted on the tracheal carrier plate 43, and a second actuating unit 44 mounted on the upper surface of the substrate 1 and connected to the tracheal carrier plate 43 to drive its movement. Specifically, the second guide unit has a similar structure to the first guide unit, including a second limiting vertical plate 41 installed on the upper surface of the substrate 1 (the second limiting vertical plate 41 is also spaced apart from the base 21, but the second limiting vertical plate 41 is in a different orientation from the first limiting vertical plate 31 and is perpendicular to the first limiting vertical plate 31), multiple second guide rods 42 (two in this application, which are perpendicular to the second limiting vertical plate 41) installed between the second limiting vertical plate 41 and the base 21, and multiple second guide sleeves 40 that are correspondingly sleeved on the second guide rods 42 and can slide (that is, the second guide sleeves 40 are correspondingly sleeved on the second guide rods 42, so that they can slide on the second guide rods 42 under the action of external force). In this embodiment, the tracheal carrier plate 43 has a slot 432 for installing a test tracheal tube (the connection between the slot 432 and the test tracheal tube adopts conventional methods, such as insertion or snap-fit). A sealing gasket that mates with the test tracheal tube is provided within the slot 432 to ensure a tight seal between the tracheal carrier plate 43 and the test tracheal tube. The tracheal carrier plate 43 also has an air inlet 43 corresponding to the slot 432. The differential pressure sensor is connected to a conventional leak testing device using the test tracheal tube for a leak test.

[0027] In this embodiment, the second actuating unit 44 can be a conventional one, as long as it enables the tracheal carrier plate 43 to move relative to the base 21. Its structure is basically the same as that of the first actuating unit 35 but slightly different. Specifically, the second actuating unit 44 includes a pad 441 mounted on the upper surface of the base plate 1, a second support frame 442 mounted on the pad 441, a second limiting sleeve 443 mounted on the second support frame 442, a second moving rod 444 inserted in the second limiting sleeve 443, a second adapter plate 445 mounted on one end of the second moving rod 444, multiple support rods 446 mounted between the second adapter plate 445 and the tracheal carrier plate 43 (this is different from the first actuating unit 35), a second mounting seat 448 mounted on the pad 441, a second connecting arm 449 pivotally connected at one end to the other end of the second moving rod 444, and a second L-shaped lever 440 pivotally connected to the second mounting seat 448 and the other end of the second connecting arm 449.

[0028] When the second L-shaped lever 440 is manually operated, the second moving lever 444 can be moved, thereby causing the tracheal carrier plate 43 to move closer to or further away from the base 21. When the tracheal carrier plate 43 is close to the base 21, the air inlet 43 and the trachea can be used to clamp the nozzle of the differential pressure sensor. In this way, the differential pressure sensor can be connected to a conventional leak test device using the test trachea to perform a sealing test.

[0029] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A differential pressure sensor test fixture, characterized by, It includes: base(1); The limiting component (2) includes a base (21) mounted on the upper surface of the substrate (1) and having a limiting groove (211) on the top, and a limiting barrier (22) mounted on the top of the base (21). The limiting barrier (22) has a limiting through hole (221) corresponding to the limiting groove (211). One side of the limiting barrier (22) is provided with a first clearance notch (223) communicating with the limiting through hole (221), and the other side is provided with at least one second clearance notch (224) communicating with the limiting through hole (221). The pin assembly (3) includes a first guide unit mounted on the upper surface of the substrate (1) and corresponding to the first clearance notch (223), a pin carrier plate unit (34) slidably mounted on the first guide unit, a test pin (30) mounted on the pin carrier plate unit (34), and a first actuating unit (35) mounted on the upper surface of the substrate (1) and connected to the pin carrier plate unit (34) to drive it to move. The sealing assembly (4) includes a second guide unit mounted on the upper surface of the substrate (1) and corresponding to the second clearance notch (224), a tracheal carrier plate (43) slidably mounted on the second guide unit, a test trachea mounted on the tracheal carrier plate (43), and a second actuating unit (44) mounted on the upper surface of the substrate (1) and connected to the tracheal carrier plate (43) to drive it to move.

2. The differential pressure sensor testing fixture according to claim 1, characterized in that: The limiting barrier (22) forms a finger avoidance groove (222) at the limiting through hole (221).

3. The differential pressure sensor testing fixture according to claim 1 or 2, characterized in that: The first guide unit includes a first limiting vertical plate (31) mounted on the upper surface of the substrate (1), a plurality of first guide rods (32) mounted between the first limiting vertical plate (31) and the base (21), and a plurality of first guide sleeves (33) that are correspondingly sleeved on the first guide rods (32) and are slidable.

4. The differential pressure sensor testing fixture according to claim 3, characterized in that: The pin carrier unit (34) includes a carrier plate (341) through which multiple first guide rods (32) pass and connected to multiple first guide sleeves (33), and an adapter block (342) mounted on the carrier plate (341), wherein the test pin (30) is mounted on the adapter block (342).

5. The differential pressure sensor testing fixture according to claim 4, characterized in that: The first actuation unit (35) includes a first pad (351) mounted on the upper surface of the substrate (1), a first support frame (352) mounted on the first pad (351), a first limiting sleeve (353) mounted on the first support frame (352), a first moving rod (354) inserted into the first limiting sleeve (353), a first adapter plate (355) mounted on one end of the first moving rod (354) and connected to the carrier plate (341), a first mounting seat (356) mounted on the first support frame (352), a first connecting arm (357) pivotally connected at one end to the other end of the first moving rod (354), and a first L-shaped lever (358) pivotally connected to the first mounting seat (356) and pivotally connected to the other end of the first connecting arm (357).

6. The differential pressure sensor testing fixture according to claim 1 or 2, characterized in that: The second guide unit includes a second limiting vertical plate (41) mounted on the upper surface of the substrate (1), a plurality of second guide rods (42) mounted between the second limiting vertical plate (41) and the base (21), and a plurality of second guide sleeves (40) that are correspondingly sleeved on the second guide rods (42) and are slidable.

7. The differential pressure sensor testing fixture according to claim 6, characterized in that: The tracheal carrier plate (43) has a slot (432) for installing the test tracheal tube. A sealing gasket that matches the test tracheal tube is provided in the slot (432). The tracheal carrier plate (43) also has an air inlet (431) corresponding to the slot (432).

8. The differential pressure sensor testing fixture according to claim 6, characterized in that: The second actuating unit (44) includes a pad (441) mounted on the upper surface of the base plate (1), a second support frame (442) mounted on the pad (441), a second limiting sleeve (443) mounted on the second support frame (442), a second moving rod (444) inserted into the second limiting sleeve (443), a second adapter plate (445) mounted on one end of the second moving rod (444), multiple support rods (446) mounted between the second adapter plate (445) and the tracheal carrier plate (43), a second mounting seat (448) mounted on the pad (441), a second connecting arm (449) pivotally connected at one end to the other end of the second moving rod (444), and a second L-shaped lever (440) pivotally connected to the second mounting seat (448) and pivotally connected to the other end of the second connecting arm (449).

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