Differential pressure sensor testing equipment

Abstract

The utility model provides a differential pressure transducer test device, comprising a test box which is provided with an opening and is used for providing a test environment; the testing jig and the testing mechanism are arranged on the frame body; the test fixture is used for bearing and fixing a to-be-tested product, and the test mechanism is used for being electrically conducted with the to-be-tested product on the test fixture; the frame body is configured to be capable of driving the test fixture to enter the test box through the opening under the driving of an external force, so that the test mechanism tests a to-be-tested product in the test box. The differential pressure sensor testing equipment can simulate an extreme environment and test the performance and the function of a differential pressure high jig sensor in the extreme environment.

Description

Technical Field

[0001] The utility model relates to the technical field of product testing, and more specifically, to a pressure difference sensor testing device. Background Art

[0002] In order to meet the increasingly stringent emission requirements, a high common mode differential pressure sensor has been developed. This product is a special differential pressure sensor specially developed for the EFM (exhaust gas recirculation flow measurement system) technical route and is suitable for EGR (exhaust gas recirculation system) pipeline application environment.

[0003] However, in current production, it is impossible for humans to test the product in extreme environments. Utility Model Content

[0004] In view of the above problems, the utility model provides a differential pressure sensor testing device capable of simulating extreme environments and testing the performance and function of a differential pressure high-mode sensor in extreme environments.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a pressure difference sensor testing device, comprising:

[0007] A test box having an opening for providing a test environment;

[0008] A frame and a test fixture and a test mechanism configured on the frame; the test fixture is used to carry and fix the product to be tested, and the test mechanism is used to be electrically connected to the product to be tested on the test fixture;

[0009] The frame is configured to drive the test fixture through the opening into the test box under the drive of an external force, so that the test mechanism can test the product to be tested in the test box.

[0010] A preferred solution is that the test fixture includes a support frame fixed to the frame body and a plurality of bearing structures fixed to the support frame for bearing and fixing the product to be tested.

[0011] A preferred solution is that the support frame is a pyramid-shaped support frame formed by fixing multiple frames in sequence along the vertical direction; steps are formed between adjacent frames for supporting and fixing the bearing structure.

[0012] The preferred solution is that the bearing structure includes a loading plate for carrying the product to be tested, a crimping assembly for pressing down the product to be tested, and a driving assembly for driving the crimping assembly to move;

[0013] The crimping assembly includes a plate body fixed to the driving end of the driving assembly, a PCB board arranged on the side of the plate body away from the product to be tested, an electrical connector arranged on the PCB board and a crimping member for pressing the product to be tested; the electrical connector runs through the plate body; the PCB board includes an interface for conducting with a test mechanism;

[0014] The driving assembly is configured to drive the plate to move up and down so that the crimping piece presses down the product to be tested and the end of the electrical connector is in contact with the electrical connection end of the product to be tested.

[0015] A preferred solution is that the download plate can be slidably arranged on the support frame along a first direction; the frame can drive the test fixture to enter the test box along a second direction; and in the same horizontal plane, the first direction is perpendicular to the second direction.

[0016] A preferred solution is that a reinforcement structure is provided on a surface of the plate body facing away from the download plate.

[0017] A preferred solution is that the download plate is provided with a plurality of sealing rings for cooperating with the product to be tested.

[0018] A preferred solution is that the driving assembly includes a mounting frame, a driving member and a guide structure disposed on the mounting frame and capable of driving the plate to move in a vertical direction.

[0019] A preferred solution is that the differential pressure sensor testing device further comprises a box cover fixed on the frame; the support frame is fixed to a side of the box cover facing away from the frame; and the box cover can be closed with the test box under the drive of the frame.

[0020] A preferred solution is that the bearing structure further includes a limiting member for limiting and fixing the download plate.

[0021] The beneficial effects of the utility model are:

[0022] The utility model uses the test box to simulate an extreme test environment through the cooperation of a test box, a frame, a test fixture and a test mechanism arranged on the frame, and uses the test box to simulate an extreme test environment, and uses the frame to drive the test fixture to move and enter the test box through an opening, so that the test mechanism located outside can perform a conduction test on the product to be tested in the extreme test environment provided by the test box, thereby obtaining the performance and function test results of the differential pressure high-mode sensor, the test effect is good, the accuracy is high, the operation is convenient and quick, and the work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0025] Figure 2 It is a schematic diagram of the cooperation between the test fixture and the box cover of the utility model.

[0026] Figure 3 It is a structural schematic diagram of the bearing structure of the utility model.

[0027] Figure 4 It is an assembly schematic diagram of the load-bearing structure of the utility model.

[0028] Figure numerals: 10, test box, 20, frame, 30, test fixture, 40, test mechanism, 11, opening, 12, fixing frame, 21, universal wheel, 22, anchor, 31, support frame, 32, bearing structure, 321, download board, 322, board, 323, PCB board, 324, electrical connector, 325, interface, 326, mounting frame, 327, driving member, 328, guide column, 329, guide sleeve, 33, reinforcement structure, 34, sealing ring, 41, box cover, 50, product to be tested, 351, guide rail, 352, assembly plate, 353, handle, 354, limit column, 355, crimping part. DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0031] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0032] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] In order to solve the problem that in existing production, it is impossible to test products manually in extreme environments. The utility model provides a pressure difference sensor testing device, combined with Figures 1 to 4As shown, specifically, the differential pressure sensor testing equipment includes: a test box 10 with an opening 11 for providing a test environment for a product to be tested 50, the test box 10 is an aging box, which can simulate a test environment with a temperature of -40 to 140°, and can be supported and fixed by a support frame 12; a frame 20 and a test fixture 30 and a test mechanism 40 configured on the frame 20; the test fixture 30 is used to carry and fix the product to be tested 50, and the test mechanism 40 is used to be electrically connected with the product to be tested 50 on the test fixture 30, so as to test the product to be tested 50; the frame 20 is configured to drive the test fixture 30 through the opening 11 into the test box 10 under the drive of an external force, so that the test mechanism 40 can test the product to be tested 50 located in the test box 10 ; The utility model utilizes the movability of the frame 20 and the test fixture 30, and connects and locks the test fixture 30 with the test box 10 by means of plug-in locking. Specifically, the frame 20 is pushed and pulled by external force to drive the test fixture 30 so that the test fixture 30 is pushed into the test box 10 or pulled out of the test box 10, thereby facilitating the installation and fixation of the product 50 to be tested on the test fixture 30 or removing the tested product from the test fixture 30. It can be understood that the external force drive can be manual push-pull or motor drive; the product 50 to be tested is a differential pressure sensor, which includes two air inlets for introducing gas; 240 products 50 to be tested can be placed on the test fixture 30 at one time and inserted into the test box 10, so as to achieve synchronous testing of all products, thereby greatly improving the testing efficiency.

[0035] In the above embodiment, regarding the specific structure of the test fixture 30, the test fixture 30 includes a support frame 31 fixed to the frame 20 and a plurality of supporting structures 32 fixed on the support frame 31 for supporting and fixing the products to be tested 50. The supporting structures 32 can be used to stably fix the plurality of products to be tested 50 on the support frame 31 to ensure smooth product testing.

[0036] Furthermore, the support frame 31 is a pyramid-shaped support frame formed by multi-level frames fixed in sequence along the vertical direction; all frames are symmetrical about a vertical plane, and the size of the frames gradually increases from top to bottom; steps are formed between adjacent frames to support and fix the supporting structure 32; all supporting structures 32 are arranged in a stepped manner on two opposite sides of the support frame 31; the above-mentioned support frame 31 adopts a pyramid-shaped structure so that the aging environment (alternating hot and cold) in the aging box can fully contact the product 50 to be tested on the test fixture 30 from bottom to top, and the aging test effect is good. It can be understood that if a conventional square structure is adopted, the product located in the middle part of the support frame 31 will not have a good contact effect with the aging environment, which will reduce the accuracy of the test.

[0037] In a specific embodiment, regarding the specific structure of the bearing structure 32, the bearing structure 32 includes a download plate 321 for carrying the product to be tested 50, the download plate 321 can carry multiple products to be tested 50 at the same time, a crimping assembly for pressing the product to be tested 50 on the download plate 321, and a driving assembly for driving the crimping assembly to move in a vertical direction, the driving assembly can drive the crimping assembly to be crimped on the product to be tested 50 or to make the crimping assembly detach from the product to be tested 50; specifically, the crimping assembly includes The drive assembly includes a plate body 322 fixed to the drive end, a PCB board 323 arranged on the side of the plate body 322 away from the product to be tested 50, an electrical connector 324 arranged on the PCB board 323 and a crimping member 355 for pressing the product to be tested, the crimping member 355 can be a spring plunger; the electrical connector 324 runs through the plate body 322; the PCB board 323 includes an interface 325 for conducting with the test mechanism 40; the drive assembly is configured to drive the plate body 322 to rise The pressure connector 355 is pressed down so that the end of the electrical connector 324 contacts and conducts with the electrical connection end of the product 50 to be tested, and is electrically connected with the test mechanism 40 through the PCB board 323, thereby realizing the test of the product 50 to be tested in the aging box. The electrical connector 324 can be a probe arranged along the vertical direction, and the end of the probe is used to contact and conduct with the test point on the differential pressure sensor. It can be understood that when the differential pressure sensor is placed on the download board 321, the test point is located on the upper side, and the air inlet is located on the lower side; each probe is configured on the plate body 322 and penetrates the plate body 322, and a plurality of spring plungers are arranged on the plate body 322. The spring plungers are used to apply a suitable pre-tightening force to the product 50 to be tested, so that the product 50 to be tested is stably pressed down and fixed on the download plate 321, thereby ensuring that the probe and the product 50 to be tested are in stable contact and no damage occurs. The number of probes to be set needs to be determined according to the number of products 50 to be tested carried on the download plate 321, and the utility model does not impose any restriction on this.

[0038] In a specific embodiment, the download plate 321 can be slidably arranged on the support frame 31 along the first direction. Specifically, a guide rail 351 extending along the first direction is arranged on the support frame 31, and the guide rail 351 is fixed to the support frame 31 through an assembly plate 352. The download plate 321 is configured on the guide rail 351 through a slider, and a handle 353 is also arranged on the download plate 321 for manual push and pull operations. The above arrangement can make the placement of the product 50 to be tested more convenient and quick; further, the bearing structure 32 also includes a limiting member for limiting and fixing the download plate 321, that is, when the download plate 321 carrying the product 50 to be tested is pushed into place on the support frame 31, the handle 353 is moved by the slider. The limiter can limit the position of the download plate 321 to ensure the stability of the download plate 321 after it is in place. The limiter can be a magnetic member. A matching member for magnetically cooperating with the magnetic member is provided at the corresponding position of the download plate 321 to achieve magnetic fixation of the download plate 321. The frame 20 can drive the test fixture 30 to enter the test box 10 along the second direction. Specifically, universal wheels 21 and feet 22 can be provided at the bottom of the frame 20. The frame 20 can be moved by manually pushing it and can be supported by the feet 22 or a slide rail extending along the second direction can be provided. The frame 20 can be slidably configured on the slide rail through a slider. In the same horizontal plane, the first direction is perpendicular to the second direction. Figure 1 As shown, the X direction is the first direction, the Y direction is the second direction, and the Z direction is the vertical direction and is perpendicular to both the first direction and the second direction. It can be understood that the fixing frame 12 can also be adjusted in the above manner to better match the frame 20 and the test fixture 30.

[0039] In a specific embodiment, a reinforcement structure 33 is provided on the surface of one side of the plate body 322 facing away from the download plate 321. The reinforcement structure 33 is two strip-shaped reinforcement ribs, and the two reinforcement ribs are respectively arranged at two relatively long sides of the plate body 322. The reinforcement ribs can increase the strength of the plate body 322, ensuring that the downward pressure provided by the plate body 322 can be stably and evenly applied to the product 50 to be tested, avoiding side leakage of the differential pressure sensor during testing, improving the air tightness during testing, and thereby improving the accuracy of the test results.

[0040] In a specific embodiment, the download board 321 is provided with a plurality of sealing rings 34 for sealing the air inlet of the differential pressure sensor, and each differential pressure sensor corresponds to two sealing rings 34. The sealing ring 34 can be made of rubber material. When the crimping part 355 presses down the differential pressure sensor under the drive of the plate body 322, the differential pressure sensor can cooperate closely with the sealing ring 34 to achieve sealing of the air inlet, thereby ensuring the accuracy of the test results. It can be understood that the download board 321 is provided with a gas interface for an external inflation device and a plurality of air holes for inflating the air inlet of the differential pressure sensor. The air holes are connected to the gas interface, and the sealing ring 34 surrounds the outside of the air hole to avoid gas leakage.

[0041] In a specific embodiment, the driving assembly includes a mounting frame 326 fixed to the assembly plate 352, a driving member 327 and a guide structure arranged on the horizontal plate of the mounting frame 326 and capable of driving the plate body 322 to move in the vertical direction. More specifically, the two side vertical plates of the mounting frame 326 are fixed to the mounting plate 352; the driving member 327 can be an axis clamp, the driving axis of the axis clamp is fixed to the plate body 322. Through the above arrangement, the structure is simple, easy to operate and occupies a small space. If the manufacturing cost and the occupied space are not considered, the driving member 327 can also be a vertically arranged cylinder or linear module; the guide structure can specifically include a guide column 328 fixed to the plate body 322 at the lower end and a guide sleeve 329 arranged on the mounting frame 326. The guide column 328 passes through the guide sleeve 329 and can move in the guide sleeve 329 in the vertical direction to guide the movement of the plate body 322.

[0042] In a specific embodiment, the differential pressure sensor testing equipment also includes a box cover 41 fixed on the frame 20; the support frame 31 is fixed to the side of the box cover 41 facing away from the frame 20; the box cover 41 can be driven by the frame 20 to cover the test box 10 to achieve sealing of the test box 10, thereby ensuring the sealing of the test environment during the test. Furthermore, a plurality of limit columns 354 can be set on the lower surface of the plate 322 to limit the downward movement of the plate 322, so as to better protect the product 50 to be tested from being damaged by excessive downward pressure.

[0043] The specific working process of the utility model is as follows: the pressure difference sensor to be tested is placed on the download board 321 and the air inlet is aligned with the air hole. The driving assembly drives the plate body 322 to rise and fall so that the crimping piece 355 presses down the pressure difference sensor and the end of the electrical connector 324 contacts and conducts with the test point on the pressure difference sensor. The frame 20 is pushed to drive the test fixture 30 to enter the test box 10 through the opening 11, and the box cover 41 is tightly covered on the opening 11 of the test box 10 to form a closed cavity. The test box 10 works to provide the required test environment, and is electrically connected with the test mechanism 40 through the PCB board 323, so that the test mechanism 40 located outside the box body 10 can test the pressure difference sensor in the test box 10.

[0044] To summarize, the utility model utilizes the test box to simulate an extreme test environment through the cooperation of a test box, a frame, a test fixture and a test mechanism arranged on the frame, and utilizes the test box to drive the test fixture to move and enter the test box through an opening, so that the test mechanism located outside can perform a conduction test on the product to be tested in the extreme test environment provided by the test box, thereby obtaining the performance and function test results of the high pressure difference mold sensor, the test effect is good, the accuracy is high, the operation is convenient and quick, and the work efficiency is improved.

[0045] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A pressure differential sensor testing device, characterized in that: include: A test box having an opening for providing a test environment; A frame and a test fixture and a test mechanism configured on the frame; The test fixture is used to carry and fix the product to be tested, and the test mechanism is used to be electrically connected to the product to be tested on the test fixture; The frame is configured to drive the test fixture through the opening into the test box under the drive of an external force, so that the test mechanism can test the product to be tested in the test box.

2. The differential pressure sensor testing device according to claim 1, characterized in that: The test fixture comprises a support frame fixed to the frame body and a plurality of bearing structures fixed to the support frame for bearing and fixing the product to be tested.

3. The differential pressure sensor testing device according to claim 2, characterized in that: The support frame is a pyramid-shaped support frame formed by fixing multiple frames in sequence along the vertical direction; steps for supporting and fixing the bearing structure are formed between adjacent frames.

4. The differential pressure sensor testing device according to claim 2, characterized in that: The bearing structure includes a loading plate for carrying the product to be tested, a crimping assembly for pressing down the product to be tested, and a driving assembly for driving the crimping assembly to move; The crimping assembly includes a plate body fixed to the driving end of the driving assembly, a PCB board arranged on the side of the plate body away from the product to be tested, an electrical connector arranged on the PCB board and a crimping member for pressing the product to be tested; the electrical connector runs through the plate body; the PCB board includes an interface for conducting with a test mechanism; The driving assembly is configured to drive the plate to move up and down so that the crimping piece presses down the product to be tested and the end of the electrical connector is in contact with the electrical connection end of the product to be tested.

5. The differential pressure sensor testing device according to claim 4, characterized in that: The download plate can be slidably arranged on the support frame along a first direction; the frame can drive the test fixture to enter the test box along a second direction; in the same horizontal plane, the first direction is perpendicular to the second direction.

6. The differential pressure sensor testing device according to claim 4, characterized in that: A reinforcement structure is arranged on a surface of the plate body on one side facing away from the download plate.

7. The differential pressure sensor testing device according to claim 4, characterized in that: The download plate is provided with a plurality of sealing rings for cooperating with the product to be tested.

8. The differential pressure sensor testing device according to claim 4, characterized in that: The driving assembly comprises a mounting frame, a driving member and a guide structure which are arranged on the mounting frame and can drive the plate body to move in a vertical direction.

9. The differential pressure sensor testing device according to claim 2, characterized in that: The differential pressure sensor testing device also includes a box cover fixed on the frame; the support frame is fixed to the side of the box cover away from the frame; the box cover can be closed with the test box under the drive of the frame.

10. The differential pressure sensor testing device according to claim 5, characterized in that: The bearing structure also includes a limiting member for limiting and fixing the download plate.

Images