CN218995571U - Be used for state detection circuit in ageing rack function test board - Google Patents
Be used for state detection circuit in ageing rack function test board Download PDFInfo
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- CN218995571U CN218995571U CN202123070374.5U CN202123070374U CN218995571U CN 218995571 U CN218995571 U CN 218995571U CN 202123070374 U CN202123070374 U CN 202123070374U CN 218995571 U CN218995571 U CN 218995571U
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Abstract
The utility model discloses a state detection circuit used in an aging rack function test machine, which comprises a PCB board, wherein a first plug-in header, a second plug-in header, a third plug-in header, a fourth plug-in header, a fifth plug-in header and a power connector are arranged on the PCB board, a decoder and 14 selectors are arranged in the PCB board, the decoder is an IC DM74LS154WM4-line-to-16-line decoder, and the selectors are IC 74F251 eight-way selectors. The utility model relates to a simple level detection circuit which scans the level condition of each product in real time through IO control so as to realize real-time monitoring. The working level of each product related point position is acquired by adopting test software to judge the working state of the product, so that manual check is avoided; only two wires are needed to be connected to the detection plate for each product, the condition of more and complicated wires is avoided, and the detection requirement is realized. The utility model has low cost, simple wiring, convenient maintenance and easy realization.
Description
Technical Field
The utility model relates to the technical field of testers, in particular to a state detection circuit used in an aging rack function tester.
Background
After the PCBA product is tested in function, some PCBA products are also verified for reliability, stability and tolerance to various environmental factors; this involves subjecting the product to an ageing test. In the aging test process, generally, tens, even hundreds of products are subjected to aging test at the same time, for example, fig. 1 is a block diagram of the aging test for 112 products.
How the status of each board could be detected in real time during the 112 product burn-in tests. The general detection method comprises the following steps: 1. each product is added with an indicator light for displaying the state of the product; 2. connecting the communication line of each product to a computer, and determining the working state of the board through communication;
the method has the following defects:
The 2 nd method is ideal, but has the defects of more wires, switching, complex wiring and difficult realization, and therefore, the utility model provides an aging rack function test machine for a state detection circuit.
Disclosure of Invention
The utility model aims to provide a state detection circuit used in an aging rack function test machine table so as to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an ageing rack function test board is arranged in state detection circuit, includes the PCB board, be equipped with first plug-in components ox horn, second plug-in components ox horn, third plug-in components ox horn, fourth plug-in components ox horn, fifth plug-in components ox horn, power connector on the PCB board, the PCB board embeds a decoder and 14 selectors, the decoder is IC DM74LS154WM4-line-to-16-line decoder, the selector is IC 74F251 eight-way selector.
The DO is extended by an IC DM74LS154WM4-line-to-16-line decoder, and the selective sampling of 112pcs product voltage can be realized by 14 IC 74F251 eight-way selectors. The product voltage is connected to the input end of the detection circuit after the voltage division of the resistor, DO is set by the test software, and the output end of the detection circuit is measured by the DMM.
Compared with the prior art, the utility model has the beneficial effects that: the utility model relates to a simple level detection circuit which scans the level condition of each product in real time through IO control so as to realize real-time monitoring. The working level of each product related point position is acquired by adopting test software to judge the working state of the product, so that manual check is avoided; only two wires are needed to be connected to the detection plate for each product, the condition of more and complicated wires is avoided, and the detection requirement is realized. The utility model has low cost, simple wiring, convenient maintenance and easy realization.
Drawings
FIG. 1 is a block diagram of an aging test performed on 112 products;
FIG. 2 is a schematic diagram of a PCB layout structure according to the present utility model;
FIG. 3 is a schematic diagram of a PCB circuit of the present utility model;
FIG. 4 is a schematic diagram of a decoder circuit according to the present utility model;
fig. 5 is a circuit schematic of the power connector of the present utility model.
In the figure: 1. a first insert ox horn; 2. a second insert ox horn; 3. a third insert ox horn; 4. a fourth insert ox horn; 5. fifth plug-in ox horn; 6. a PCB board; 7. a power connector.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 2-5, the present utility model provides a technical solution: the utility model provides an ageing rack function test board is arranged in state detection circuit, includes PCB board 6, be equipped with first plug-in components ox horn 1, second plug-in components ox horn 2, third plug-in components ox horn 3, fourth plug-in components ox horn 4, fifth plug-in components ox horn 5, power connector 7 (i.e. P1 in FIG. 5) on the PCB board 6, PCB board 6 embeds a decoder (i.e. U15 in FIG. 4) and 14 selectors, the decoder is IC DM74LS154WM4-line-to-16-line decoder, the selector is IC 74F251 eight way selector.
The surface of the PCB 6 is provided with a waterproof coating. The first inserting ox horn 1, the second inserting ox horn 2, the third inserting ox horn 3, the fourth inserting ox horn 4 and the fifth inserting ox horn 5 are all 2.45mm inserting ox horns. The width of the PCB 6 is 102.108mm, and the length is 261.8mm.
DMM Digital Multimeter digital multimeter;
printed Circuit Board Assembly printed circuit board assembly;
DUT Device Under Test devices under test;
FCT is a Function-circulation testing Function test;
burn In aging test.
Specifically, when in use, the IC DM74LS154WM4-line-to-16-line decoder is adopted to extend DO, and 14 IC 74F251 eight-way selectors are adopted to realize the selective sampling of 112pcs product voltage. The product voltage is connected to the input end of the detection circuit after the voltage division of the resistor, DO is set by the test software, and the output end of the detection circuit is measured by the DMM.
The state detection circuit used in the aging rack functional test machine is a simple level detection circuit, and the level condition of each product is scanned in real time through IO control so as to realize real-time monitoring. The working level of each product related point position is acquired by adopting test software to judge the working state of the product, so that manual check is avoided; only two wires are required to be connected to the detection board (namely the PCB 6) for each product, the condition of more and complicated wires is avoided, and the detection requirement is realized.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. Be arranged in state detection circuit in ageing rack function test board, including PCB board (6), its characterized in that: be equipped with first plug-in components ox horn (1), second plug-in components ox horn (2), third plug-in components ox horn (3), fourth plug-in components ox horn (4), fifth plug-in components ox horn (5), power connector (7) on PCB board (6), PCB board (6) embeds has a decoder and 14 selectors, the decoder is IC DM74LS154WM4-line-to-16-line decoder, the selector is IC 74F251 eight way selector.
2. The burn-in stand functional test machine of claim 1 wherein the status detection circuitry comprises: the surface of the PCB (6) is provided with a waterproof coating.
3. The burn-in stand functional test machine of claim 1 wherein the status detection circuitry comprises: the first plug-in header (1), the second plug-in header (2), the third plug-in header (3), the fourth plug-in header (4) and the fifth plug-in header (5) are all 2.45mm plug-in header.
4. The burn-in stand functional test machine of claim 1 wherein the status detection circuitry comprises: the width of the PCB (6) is 102.108mm, and the length of the PCB is 261.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123070374.5U CN218995571U (en) | 2021-12-08 | 2021-12-08 | Be used for state detection circuit in ageing rack function test board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123070374.5U CN218995571U (en) | 2021-12-08 | 2021-12-08 | Be used for state detection circuit in ageing rack function test board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218995571U true CN218995571U (en) | 2023-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123070374.5U Active CN218995571U (en) | 2021-12-08 | 2021-12-08 | Be used for state detection circuit in ageing rack function test board |
Country Status (1)
| Country | Link |
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| CN (1) | CN218995571U (en) |
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2021
- 2021-12-08 CN CN202123070374.5U patent/CN218995571U/en active Active
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