CN211928139U

CN211928139U - Multi-channel conductivity test platform

Info

Publication number: CN211928139U
Application number: CN202020217309.7U
Authority: CN
Inventors: 王旭
Original assignee: Siemens Sensors and Communication Ltd
Current assignee: Siemens Sensors and Communication Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-11-13
Anticipated expiration: 2030-02-27

Abstract

The utility model provides a multichannel conductivity test platform, include: the relay group and the universal meter are respectively connected with the control unit; the test assembly sets up in the frame, and the test assembly further includes: the lifting platform is provided with a platform capable of moving up and down and a plurality of test needles positioned on the platform; the clamp is arranged on one side of the lifting platform and is provided with a chuck positioned above the lifting platform.

Description

Multi-channel conductivity test platform

Technical Field

The utility model relates to an instrument test field especially relates to a multichannel conductivity test platform suitable for temperature instrument product test.

Background

During the production process of some selected temperature instrument products, the conductivity of the temperature instrument products needs to be tested. It is required that the product is acceptable only if all the path resistances are smaller than a defined value.

The operation steps of the prior art are as follows: the operator touches a pair of terminals on the product using a test pen on a multimeter, reads three times and records the value displayed on the high precision multimeter, calculates the average and then determines whether it exceeds a limit. Repeating the steps until whether the resistance of all the paths meets the requirement is confirmed, and finally judging whether the tested product is qualified.

From the above description of the operating steps, some problems are found:

1.1 human factors, including the location and strength of the stylus touch, are very likely to affect the connection between the multimeter and the product. This means that this measurement is difficult to achieve accurately;

1.2, in complex steps, human errors are high in risk, such as reading and recording, mean value calculation and judgment, in other words, unqualified products are likely to flow into a client and are not effectively controlled;

1.3 the test requires a large number of labor hours.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem of prior art, the utility model designs a multichannel conductivity test platform. The fixture with the test needles in the multi-channel conductivity test platform is connected with the test platform, and after the fixture is tightly pressed, all test points of a tested product are uniformly stressed and fixed in position, so that the measurement error caused by poor contact is eliminated. In addition, the test platform automatically completes product loop switching, mean value calculation, logic judgment and result display through interaction and control of the PLC, the high-precision multimeter, the circuit and the HMI, avoids human error, and saves a large amount of labor hour.

According to the utility model discloses an aspect provides a multichannel conductivity test platform, include:

the relay group and the universal meter are respectively connected with the control unit;

a test assembly disposed on the frame, the test assembly further comprising:

the lifting platform is provided with a platform capable of moving up and down and a plurality of testing needles positioned on the platform;

and the clamp is arranged on one side of the lifting platform and is provided with a chuck positioned above the lifting platform.

According to the utility model discloses an embodiment, in foretell multichannel conductivity test platform, further include: and the display device is in signal connection with the control unit.

According to the utility model discloses an embodiment, in foretell multichannel conductivity test platform, a plurality of test needles and a plurality of test terminal one-to-one of being surveyed the instrument.

According to the utility model discloses an embodiment, in foretell multichannel conductivity test platform, work as when lift platform rises to a test position, a plurality of test needles with a plurality of test terminals of being surveyed the instrument are the conductive contact simultaneously.

According to the utility model discloses an embodiment, in foretell multichannel conductivity test platform, work as lift platform rises during the test position, a plurality of test needles with contact pressure between a plurality of test terminals of being surveyed the instrument all exceeds a preset threshold value.

According to the utility model discloses an embodiment, in foretell multichannel conductivity test platform, the relay group includes a plurality of relays, each of a plurality of relays forms when switching on the route between two of a plurality of test needles.

According to the utility model discloses an embodiment, in foretell multichannel conductivity test platform, in the testing process, the control unit switches on one by one each relay in the relay group is in order to form the route between the different two test needles of multiunit each other, just the universal meter reads the resistance value of route sends it for the control unit.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:

fig. 1 shows a schematic diagram of one embodiment of a multi-channel continuity test platform according to the present invention.

Fig. 2 illustrates a block diagram of one embodiment of a multi-channel continuity test platform in accordance with the present invention.

Description of reference numerals:

10 machine frame

11 control unit

12 relay group

13 multimeter

20 testing assembly

21 lifting platform

22 clamping device

23 platform

24 plural testing needles

25 clamping head

30 display device

40 measured instrument

Detailed Description

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.

The basic principles and preferred embodiments of the present invention are discussed in more detail with reference to fig. 1 and 2. In the embodiment shown in fig. 1 and 2, the multi-channel conductivity test platform according to the present invention mainly comprises: a rack 10, a test assembly 20, and a display device 30.

Inside the rack 10, a control unit 11, a relay group 12 and a multimeter 13 are provided. Wherein, the relay group 12 and the multimeter 13 are respectively connected with the control unit 11, as shown in fig. 2. The control unit 11 may be, for example, a Programmable Logic Controller (PLC).

The test assembly 20 is disposed on the rack 10. The test assembly 20 further includes a lift platform 21 and a clamp 22. The elevating platform 21 has a platform 23 capable of moving up and down and a plurality of testing pins 24 located on the platform 23. The jig 22 is disposed on one side of the elevating platform 21 and has a chuck 25 located above the elevating platform 21.

During testing, the meter under test 40 is placed on the lifting platform 21 such that the plurality of test pins 24 correspond to the plurality of test terminals of the meter under test 40 one to one. When the lifting platform 21 is lifted to a testing position, the clamp 22 is pressed, and the plurality of testing pins 24 are in conductive contact with the plurality of testing terminals of the tested instrument 40 at the same time. The test points of the tested instrument 40 are evenly stressed and fixed in position. Therefore, the utility model discloses can eliminate the measuring error who arouses by the contact failure.

Preferably, when the lifting platform 21 is lifted to the testing position, the contact pressure between the plurality of testing pins 24 and the plurality of testing terminals of the meter under test 40 exceeds a predetermined threshold, so as to ensure the reliability of the connection and the stability of the test.

In addition, through the interaction and control of the control unit 11, the relay group 12 and the multimeter 13, the product loop switching, the average value calculation and the logic judgment are automatically completed, so that the manual error is avoided, and a large amount of labor hour is saved.

Specifically, the relay group 12 includes a plurality of relays. Each of the plurality of relays, when turned on, forms a path between two test pins 24 of the plurality of test pins 24. In this manner, during the test, the control unit 11 turns on the relays in the relay group 12 one by one to form a plurality of sets of paths between two test pins 24 different from each other, and the multimeter 13 reads the resistance value of the path and sends it to the control unit 11.

In addition, in the embodiment shown in fig. 1, the multi-channel continuity testing platform may further include a display device 30 in signal connection with the control unit 11 for displaying the testing result. The display device 30 may be any known display apparatus, such as an HMI device.

One example of a workflow of the multi-channel continuity test platform of the present invention is discussed below in conjunction with fig. 2. The meter under test 40 is attached to the test platform by the fixture 22. At the start of the test, control unit 11 initializes high-precision multimeter 13 and turns on one of the relays in relay group 12, turning on one of the paths. At this time, high-precision multimeter 13 measures the resistance of the path and outputs the measured resistance to control unit 11 three times. The control unit 11 takes the average of the three measurements, compares it with the set limit value, and outputs the average and the result of the determination of acceptability to the display device 30. After completing the resistance measurement and determination of one path, the control unit 11 turns off the current relay and turns on the next relay in the relay group 12, and repeats the above process until the resistance measurement and determination of all paths are completed. Finally, when the resistance values of all the paths are qualified, the control unit 11 outputs an instruction to the display device 30 to display the word "pass product test", and when the resistance value of one path is unqualified, the control unit 11 outputs an instruction to the display device 30 to display the word "fail product test".

To sum up, the utility model discloses a multichannel conductivity test platform can provide more stable connection, eliminates the contact failure that manual operation introduced, and the human error is eliminated in automatic calculation and judgement to a large amount of man-hours are saved.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. Multichannel conductivity test platform, its characterized in that includes:

the device comprises a rack (10), wherein a control unit (11), a relay group (12) and a universal meter (13) are arranged in the rack (10), and the relay group (12) and the universal meter (13) are respectively connected with the control unit (11);

a test assembly (20) disposed on the rack (10), the test assembly (20) further comprising:

a lifting platform (21) which is provided with a platform (23) capable of moving up and down and a plurality of testing needles (24) positioned on the platform (23);

and the clamp (22) is arranged on one side of the lifting platform (21) and is provided with a clamping head (25) positioned above the lifting platform (21).

2. The multi-channel continuity test platform of claim 1, further comprising: and the display device (30) is in signal connection with the control unit (11).

3. The multi-channel continuity test platform according to claim 1, wherein the plurality of test pins (24) are in one-to-one correspondence with a plurality of test terminals of the meter under test (40).

4. A multi-channel continuity test platform according to claim 3, wherein the plurality of test pins (24) are in simultaneous conductive contact with the plurality of test terminals of the meter under test (40) when the lift platform (21) is raised to a test position.

5. The multi-channel continuity test platform according to claim 4, wherein when the elevating platform (21) is raised to the test position, contact pressures between the plurality of test pins (24) and the plurality of test terminals of the meter under test (40) each exceed a preset threshold.

6. The multi-channel continuity test platform of claim 1, wherein the relay set (12) includes a plurality of relays, each of the plurality of relays, when conductive, forming a path between two of the plurality of test pins (24).

7. A multi-channel continuity test platform according to claim 6, characterized in that during a test, the control unit (11) turns on the relays in the relay group (12) one by one to form a path between two test pins different from each other, and the multimeter (13) reads the resistance value of the path and sends it to the control unit (11).