A micro differential pressure transmitter test fixture and system

Abstract

The utility model provides a micro differential pressure transmitter test tool and system, which relates to the field of micro differential pressure transmitter test technology. The micro differential pressure transmitter test tool includes a tool body and an air intake assembly. The tool body is provided with a plurality of test areas for placing products. The air intake assembly includes a positive pressure air circuit and a negative pressure air circuit. Each of the test areas is provided with two groups of connecting pipes, which are respectively connected to the positive pressure air circuit and the negative pressure air circuit. The connecting pipes are used to connect to the positive and negative pressure air ports of the product. When testing, a plurality of products are placed in the test area and connected to the connecting pipes. It is only necessary to switch the positive pressure air circuit supply and the negative pressure air circuit supply of the air intake assembly to achieve the test of a plurality of products. There is no need to switch the air pipe for each product separately, which improves the test efficiency. Moreover, by uniformly connecting a plurality of products to external equipment, there is no need to connect a power supply, a multimeter and other equipment to each product separately, which further improves the test efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of micro differential pressure transmitter testing, in particular to a micro differential pressure transmitter testing tool. Background Art

[0002] Current micro differential pressure transmitter product testing, such as Figure 3 As shown, first connect a product to the power supply and multimeter, connect the air source to the pressure control device, then connect an air pipe from the pressure control device, and finally connect the air pipe to the product for sampling, output adjustment, and testing.

[0003] Since the micro-differential pressure product has two air ports, positive pressure and negative pressure, the air pipe connected from the pressure control device must first be connected to the negative pressure port of the product to perform sampling, output adjustment and testing. After that, the air pipe is connected to the positive pressure port and the sampling, output adjustment and testing actions are repeated. Such an operation process is inefficient when operating large quantities of products. In view of the above defects, the present application is proposed. Utility Model Content

[0004] The utility model aims to provide a micro differential pressure transmitter test fixture and system, which solves the problem of low test efficiency for large quantities of micro differential pressure transmitter products at this stage.

[0005] In order to solve the above problems, the utility model provides a micro-differential pressure transmitter testing tool, including a tool body and an air intake assembly, wherein the tool body is provided with a plurality of test areas for placing products, and the air intake assembly includes a positive-pressure air circuit and a negative-pressure air circuit, and each of the test areas is provided with two sets of connecting pipes, which are respectively connected to the positive-pressure air circuit and the negative-pressure air circuit, and the connecting pipes are used to connect to the positive and negative pressure air ports of the products. When testing, a plurality of products are placed in the test area and connected to the connecting pipes, and the testing of a plurality of products can be achieved by switching the positive-pressure air circuit air supply and the negative-pressure air circuit air supply of the air intake assembly.

[0006] According to an embodiment of the utility model, each of the test areas is provided with a corresponding control interface, and the control interface is connected to a control circuit board. During testing, the product is connected to the control interface, and the control circuit board is connected to external devices in a unified manner.

[0007] According to an embodiment of the present invention, the test area is composed of a column arranged on the tooling body, and the column matches the shape of the product.

[0008] According to an embodiment of the utility model, a product limiting structure is provided in the testing area.

[0009] According to an embodiment of the utility model, the wiring between the control interface and the control circuit board is extended and arranged at the bottom of the tooling body.

[0010] According to an embodiment of the utility model, the air source access end of the air intake assembly is arranged on a side position of the tooling body.

[0011] According to one embodiment of the utility model, the wiring of the control circuit board for connecting to external equipment extends through a wire hole arranged at a side position of the tooling body, and the wire hole and the air source access end of the air intake assembly are arranged at the same side position of the tooling body.

[0012] According to an embodiment of the utility model, the connecting pipe is a hose.

[0013] A micro differential pressure transmitter testing system comprises the micro differential pressure transmitter testing tooling, a pressure controller and an air source, wherein the air source is connected to an air intake assembly via the pressure controller.

[0014] According to an embodiment of the utility model, the micro differential pressure transmitter test system further includes a voltage stabilizing source, a multimeter and a computer, and the voltage stabilizing source, the multimeter and the computer are connected to the control circuit board.

[0015] The beneficial effect of the utility model is that by arranging several test areas on the tooling, multiple products can be tested at the same time. When testing, each product is connected to the connecting pipe respectively. During the test, it is only necessary to switch the positive pressure air supply and the negative pressure air supply of the air intake assembly to realize the testing of several products. There is no need to plug and unplug the air pipe for each product respectively, which improves the testing efficiency. Moreover, by connecting several products to external equipment in a unified manner, there is no need to connect each product to a power supply, a multimeter and other equipment respectively, which further improves the testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 This is the overall structural diagram of the micro differential pressure transmitter test fixture;

[0018] Figure 2 This is a schematic diagram of the bottom structure of the micro differential pressure transmitter test fixture;

[0019] Figure 3 Schematic diagram of the traditional micro differential pressure transmitter testing method. DETAILED DESCRIPTION

[0020] The following description is only used to disclose the utility model so that those skilled in the art can implement the utility model. The embodiments described below are only for example, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other solutions that do not deviate from the spirit and scope of the utility model.

[0021] [Example 1]

[0022] A micro differential pressure transmitter test fixture, such as Figure 1 , including a tooling body 1 and an air intake assembly 7. The tooling body 1 is provided with several test areas 2 for placing products. The air intake assembly 7 includes a positive-pressure air circuit and a negative-pressure air circuit. Each test area 2 is correspondingly provided with two sets of connecting pipes 3. The two sets of connecting pipes 3 are respectively connected to the positive-pressure air circuit and the negative-pressure air circuit. The connecting pipes 3 are used to connect to the positive and negative pressure air ports of the products. When testing, several products 20 are placed in the test area 2 and connected to the connecting pipes 3. It is only necessary to switch the positive-pressure air circuit air supply and the negative-pressure air circuit air supply of the air intake assembly 7 to realize the testing of several products.

[0023] Specifically, the tooling body 1 can be formed by one-piece injection molding, or it can be assembled from other materials. The test area 2 is composed of a recessed column arranged on the tooling body 1. The column matches the shape of the product to facilitate the positioning and placement of the product and the stability of the product during testing. The number of test areas 2 on a tooling body 1 can be adaptively set as needed. In this embodiment, 5 test areas 2 are set, and the air intake assembly 7 consists of two air intake pipes, which correspond to the positive pressure air circuit and the negative pressure air circuit respectively. The connecting pipe 3 is arranged in the test area 2. In order to facilitate the connection between the connecting pipe 3 and the product and avoid damage to the product due to bumps, in this embodiment, the connecting pipe 3 adopts a hose, and a silicone hose or a rubber hose can be used. A product limiting structure 4 is provided in each test area 2, such as Figure 1 The product limiting structure 4 is used to limit the insertion depth of the product 20 to avoid collision between the product air inlet and the tooling, and at the same time facilitates the control of the placement position of the product, which helps to further improve the test efficiency.

[0024] When using this tooling to test products, there is no need to switch the positive and negative pressure interfaces of each product. You only need to uniformly switch the positive pressure air supply and negative pressure air supply of the air intake assembly 7 to achieve testing of multiple products, thereby achieving the purpose of improving testing efficiency.

[0025] Example 2, based on Example 1, in order to further improve the testing efficiency of the product, in this solution, the external devices required for testing are connected uniformly, without the need to connect each product separately, such as Figure 1Each test area 2 is provided with a control interface 5, which is connected to a control circuit board 6. During testing, the product is connected to the control interface 5, which is connected to external devices by the control circuit board 6. The external devices generally include a power supply, a multimeter, a computer, etc.

[0026] Preferably, the wiring between the control interface 5 and the control circuit board 6 is extended at the bottom of the tooling body 1 to ensure the simplicity of the front of the tooling and facilitate operation. At the same time, the air source access end of the air intake assembly 7 is set on the side of the tooling body 1, and the wiring of the control circuit board 6 used to connect to the external device is extended through the wire hole set on the side of the tooling body 1, and the wire hole and the air source access end of the air intake assembly 7 are set on the same side of the tooling body 1, which is beneficial to improve the efficiency of connecting the tooling with external equipment during testing.

[0027] A micro differential pressure transmitter test system, such as Figure 1 , including the micro differential pressure transmitter test fixture in any one of the above embodiments 1 or 2, a pressure controller 12 and an air source 11, and the air source 11 is connected to the air intake component 7 through the pressure controller 12.

[0028] The micro differential pressure transmitter test system further includes a voltage stabilizing source 8 , a multimeter 9 and a computer 10 , and the voltage stabilizing source 8 , the multimeter 9 and the computer 10 are connected to the control circuit board 6 .

[0029] Optionally, the gas source 11 can be connected to the positive-pressure gas circuit and the negative-pressure gas circuit in the air intake assembly 7 through two sets of pipelines, respectively, and the gas supply to the positive-pressure gas circuit or the negative-pressure gas circuit can be controlled by setting a valve.

[0030] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed and modified in any way.

Claims

1. A micro differential pressure transmitter test tool, characterized in that: The invention comprises a tooling body (1) and an air intake assembly (7), wherein the tooling body (1) is provided with a plurality of test areas (2) for placing products, the air intake assembly (7) comprises a positive pressure air circuit and a negative pressure air circuit, and each of the test areas (2) is provided with two groups of connecting pipes (3) correspondingly, the two groups of connecting pipes (3) are respectively connected to the positive pressure air circuit and the negative pressure air circuit, and the connecting pipes (3) are used to connect to the positive and negative pressure air ports of the products. When testing, a plurality of products are placed in the test areas (2) and connected to the connecting pipes (3), and the testing of the plurality of products can be achieved by simply switching the air supply of the positive pressure air circuit and the air supply of the negative pressure air circuit of the air intake assembly (7).

2. The micro differential pressure transmitter test fixture according to claim 1, characterized in that: Each of the test areas (2) is provided with a corresponding control interface (5), the control interface (5) being connected to a control circuit board (6). During testing, the product is connected to the control interface (5), and the control circuit board (6) is connected to external devices in a unified manner.

3. The micro differential pressure transmitter test fixture according to claim 1 or 2, characterized in that: The test area (2) is composed of columns arranged on the tooling body (1), and the columns match the shape of the product.

4. The micro differential pressure transmitter test fixture according to claim 3, characterized in that: A product limiting structure (4) is provided in the test area (2).

5. The micro differential pressure transmitter test fixture according to claim 2, characterized in that: The wiring between the control interface (5) and the control circuit board (6) is extended and arranged at the bottom of the tooling body (1).

6. The micro differential pressure transmitter test fixture according to claim 5, characterized in that: The air source access end of the air intake assembly (7) is arranged on the side of the tooling body (1).

7. The micro differential pressure transmitter test fixture according to claim 6, characterized in that: The wiring of the control circuit board (6) for connecting to external equipment extends out through a wire hole arranged at a side position of the tooling body (1), and the wire hole and the air source access end of the air intake assembly (7) are arranged at the same side position of the tooling body (1).

8. The micro differential pressure transmitter test fixture according to any one of claims 4 to 7, characterized in that: The connecting pipe (3) is a hose.

9. A micro differential pressure transmitter test system, characterized in that: It comprises the micro differential pressure transmitter test fixture as described in any one of claims 1 to 8, a pressure controller (12) and an air source (11), wherein the air source (11) is connected to the air inlet component (7) via the pressure controller (12).

10. The micro differential pressure transmitter test system according to claim 9, characterized in that: The micro differential pressure transmitter test system also includes a voltage stabilizing source (8), a multimeter (9) and a computer (10), wherein the voltage stabilizing source (8), the multimeter (9) and the computer (10) are connected to the control circuit board (6).

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