CN216144850U

CN216144850U - Universal adapter for testing instrumentation amplifier

Info

Publication number: CN216144850U
Application number: CN202122133798.5U
Authority: CN
Inventors: 杨怡; 赵永兴; 李永梅; 梁玥滢; 苏述鑫
Original assignee: HUBEI ACADEMY OF SPACE TECHNOLOGY INSTITUTE OF MEASUREMENT AND TESTING TECHNOLOGY
Current assignee: HUBEI ACADEMY OF SPACE TECHNOLOGY INSTITUTE OF MEASUREMENT AND TESTING TECHNOLOGY
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2022-03-29
Anticipated expiration: 2031-09-06

Abstract

The utility model relates to a universal adapter for testing an instrument amplifier, which comprises an adapter plate, a test plate and more than 2 optional resistors, wherein the adapter plate comprises a substrate, and a first socket, a second socket, a first relay, a second relay and a digital meter interface end are arranged on the substrate; the first relays correspond to the alternative resistors one to one, one end of each alternative resistor is connected with the RG2 end of the tested device seat through the corresponding first relay, and the other end of each alternative resistor is connected with the RG1 end of the tested device seat; the second relay is a single-pole double-throw relay, the knife end of the second relay is connected with the interface end of the digital meter, and the other two ends of the second relay are respectively connected with the + IN end and the OUT end of the tested device seat; the test board comprises a bottom board, a tested device seat and a third socket, wherein the tested device seat and the third socket are arranged on the bottom board; the test board is connected with the adapter board through the matching of the third socket and the second socket. The utility model has simple structure, low cost, convenient operation and strong universality.

Description

Universal adapter for testing instrumentation amplifier

Technical Field

The utility model relates to a test auxiliary device, in particular to a universal adapter for testing an instrumentation amplifier.

Background

Instrumentation amplifiers are increasingly being used in production practice as an improved product of differential amplifiers. Before the instrumentation amplifier is put into use, the instrumentation amplifier must pass a test, and different resistors need to be replaced between the gain adjusting terminals RG1 and RG2 of the device to be tested during the test process, so that the investigation of different amplification factors is realized. Because the different model instrument amplifier's magnification is different, and the test system resource that each parameter used is also different, so corresponding resistance is different. Production practice usually uses different adapter plates according to the different resistances. However, when a lot of tests are performed, especially when the number of the types of the objects to be tested is small, the adapter board needs to be repeatedly replaced or even a special adapter board needs to be newly manufactured, which not only has a long period and high cost, but also causes waste of resources. Therefore, it is necessary to design a universal adapter for testing an instrumentation amplifier, which has a simple structure, low cost, convenient operation and strong versatility.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a universal adapter for testing an instrumentation amplifier, which has the advantages of simple structure, low cost, convenience in operation and strong universality.

In order to achieve the purpose, the utility model adopts the following technical scheme: a universal adapter for testing an instrumentation amplifier comprises an adapter plate and a test plate, and is characterized by further comprising more than 2 alternative resistors, wherein the adapter plate comprises a substrate, the substrate is a double-sided PCB, and a first socket connected with a test system, a second socket connected with the test plate, a first relay, a second relay and a digital meter interface end are arranged on the substrate; the first relays correspond to the alternative resistors one to one, one end of each alternative resistor is connected with the RG2 end of the tested device seat through the corresponding first relay, and the other end of each alternative resistor is connected with the RG1 end of the tested device seat; the second relay is a single-pole double-throw relay, the pole end of the second relay is connected with the interface end of the digital meter, and the other two ends of the second relay are respectively connected with the + IN end and the OUT end of the tested device seat; the test board comprises a bottom board, a tested device seat and a third socket, wherein the tested device seat and the third socket are arranged on the bottom board; the test board is connected with the adapter board through the matching of the third socket and the second socket.

Further, the first socket is a male socket, and the first socket is connected with a female socket of the STS6100 test system.

Further, the number of the alternative resistors is 6.

Furthermore, a blank pad area is further arranged on the base plate, and the number of the second relays is 2.

The working process of the utility model is as follows: mounting all the optional resistors required by the tested object IN the resistor mounting area, and grounding the-IN end of the tested device seat to the terminal area; + IN terminates the digital signal 1; the VS terminal and the + VS terminal are connected with a power supply; the REF of the tested device seat is connected with the digital signal 2; the OUT terminal is grounded through R. The test board is connected with the adapter board through the second socket, and the adapter board is connected with the female socket of the STS6100 test system through the first socket, so that the utility model is accessed into the test system. The utility model also discloses a test system for the device to be tested. After each signal is stable, the first relay is switched to enable the corresponding alternative resistor to be connected between the RG1 end and the RG2 end of the tested device seat, and the investigation of different amplification factors of the tested instrument amplifier is achieved. And switching the second relay to sequentially connect the + IN end and the OUT end of the tested device seat to an external digital meter through the interface end of the digital meter so as to realize sampling of the + IN end and the OUT end of the amplifier of the tested instrument. And completing the test of the tested object.

The utility model provides the resistance corresponding to the tested object through the switching of the relay, thereby effectively avoiding the manufacture and repeated replacement of a large number of adapter plates, simplifying the testing process and improving the working efficiency.

The utility model has simple structure, low cost, convenient operation and strong universality.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the adapter plate structure of the present invention;

FIG. 3 is a schematic view of a test board according to the present invention;

fig. 4 is a circuit schematic of the present invention.

In the figure: 1-an adapter plate; 1.1-a substrate; 1.2-a first socket; 1.3-a second socket; 1.4-first relay; 1.5-a second relay; 1.6-digital meter interface end; 2-a test board; 2.1-a bottom plate; 2.1.1-peripheral element region; 2.1.2-resistor mounting area; 2.1.3-ground terminal region; 2.1.4-blank pad area; 2.2-device under test seat; 2.3-a third socket; 3-alternative resistance.

Detailed Description

The utility model is further described below with reference to the following figures and examples, which should not be construed as limiting the utility model.

The universal adapter for testing the instrumentation amplifier comprises an adapter plate 1, a test plate 2 and more than 2 optional resistors 3, wherein the adapter plate 1 comprises a substrate 1.1, the substrate 1.1 is a double-sided PCB, and the substrate 1.1 is provided with a first socket 1.2 for connecting a test system, a second socket 1.3 for connecting the test plate 2, a first relay 1.4, a second relay 1.5 and a digital meter interface end 1.6; the first relays 1.4 correspond to the alternative resistors 3 one by one, one end of each alternative resistor 3 is connected with the RG2 end of the device under test seat through the corresponding first relay 1.4, and the other end of each alternative resistor 3 is connected with the RG1 end of the device under test seat; the second relay 1.5 is a single-pole double-throw relay, the pole end of the second relay 1.5 is connected with the interface end 1.6 of the digital meter, and the other two ends of the second relay 1.5 are respectively connected with the + IN end and the OUT end of the tested device seat; the test board 2 comprises a bottom board 2.1, a device seat 2.2 to be tested and a third socket 2.3, wherein the device seat 2.2 and the third socket are arranged on the bottom board 2.1, the bottom board 2.1 is a double-sided PCB, and a peripheral element area 2.1.1, a resistor installation area 2.1.2 and a ground end area 2.1.3 are arranged on the bottom board 2.1; the test board 2 is connected with the adapter board 1 through the matching of the third socket 2.3 and the second socket 1.3.

The preferred embodiments are: in the above solution, the first socket 1.2 is a male socket, and the first socket 1.2 is connected to a female socket of the STS6100 test system.

The preferred embodiments are: in the above solution, the number of the alternative resistors 3 is 6.

The preferred embodiments are: in the above scheme, the bottom plate 2.1 is further provided with blank pad regions 2.1.4, and the number of the second relays 1.5 is 2.

Those not described in detail in this specification are prior art to the knowledge of those skilled in the art.

Claims

1. A universal adapter for testing instrumentation amplifiers comprises an adapter board (1) and a test board (2), and is characterized in that: the adaptive board (1) comprises a substrate (1.1), the substrate (1.1) is a double-sided PCB, and a first socket (1.2) for connecting a test system, a second socket (1.3) for connecting the test board (2), a first relay (1.4), a second relay (1.5) and a digital meter interface end (1.6) are arranged on the substrate (1.1); the first relays (1.4) correspond to the alternative resistors (3) one by one, one end of each alternative resistor (3) is connected with the RG2 end of the tested device seat through the corresponding first relay (1.4), and the other end of each alternative resistor (3) is connected with the RG1 end of the tested device seat; the second relay (1.5) is a single-pole double-throw relay, the knife end of the second relay (1.5) is connected with the digital meter interface end (1.6), and the other two ends of the second relay (1.5) are respectively connected with the + IN end and the OUT end of the tested device seat; the test board (2) comprises a bottom board (2.1), a device seat to be tested (2.2) and a third socket (2.3), wherein the device seat to be tested and the third socket are arranged on the bottom board (2.1), the bottom board (2.1) is a double-sided PCB, and a peripheral element area (2.1.1), a resistor installation area (2.1.2) and a ground end area (2.1.3) are arranged on the bottom board (2.1); the test board (2) is connected with the adapter board (1) through the matching of the third socket (2.3) and the second socket (1.3).

2. The instrumentation amplifier test universal adapter according to claim 1, wherein: the first socket (1.2) is a male socket, and the first socket (1.2) is connected with a female socket of the STS6100 test system.

3. The instrumentation amplifier test universal adapter according to claim 1 or 2, wherein: the number of the alternative resistors (3) is 6.

4. The instrumentation amplifier test universal adapter according to claim 1 or 2, wherein: the bottom plate (2.1) is also provided with a blank pad area (2.1.4), and the number of the second relays (1.5) is 2.

5. The instrumentation amplifier test universal adapter according to claim 3, wherein: the bottom plate (2.1) is also provided with a blank pad area (2.1.4), and the number of the second relays (1.5) is 2.