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Rapid detection method for testing backing board

A detection method and a technology for testing backplanes, which are applied in the direction of electronic circuit testing, measuring electronics, measuring devices, etc., can solve the problems of slow test speed, non-compliance with fast speed, and time-consuming, so as to reduce the number of tests, shorten the scanning time, The effect of increased speed

Inactive Publication Date: 2009-04-01
上海携昌电子科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has a very big disadvantage: the test speed is slow
This is a very time-consuming method of testing
This obviously does not meet the previous "fast" requirements for the test system

Method used

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  • Rapid detection method for testing backing board
  • Rapid detection method for testing backing board
  • Rapid detection method for testing backing board

Examples

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Embodiment 1

[0057] Such as figure 2As shown, in the initial state, first set the step size to N / 2 (N represents the number of networks to be tested), as in step A in the figure; then load the excitation signal to the first half of the networks to be tested, as in step As described in B; after the set delay, scan the backplane to be tested, and return the test results, as described in step C; in step D, analyze the test results to find out whether it is an open circuit or Short-circuited network; in the middle of step E, these networks (determined points) whose state has been determined will be excluded from the network to be tested; at the same time, it is judged whether there is a network with an undetermined state, and if so, the step value Adjust to half of the original, as shown in step G, return to step A, and continue the test. If the status of all networks has been determined, then enter the diagnostic module to analyze whether there are short circuit and open circuit errors on th...

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Abstract

The invention relates to a fast detecting method for testing backboard. The method comprises the following steps: networks to be tested on the backboard are divided into different groups according to special rules; an actuating signal source is loaded to all networks in one group; response signal generated by the network for the actuating signal is scanned; the networks, state of which is confirmed, are obtained by analyzing the response signal and picked out from the networks to be tested; testing is carried out on the networks to be tested to decide whether the networks to be tested are empty, if so, analysis is carried out to decide whether the backboard is wrong and the wrong position according to the conforming state of all networks on the backboard. Compared with the prior art, scanning test is carried out on the backboard and times for testing are reduced, thus shortening the scanning time and effectively improving the speed of scanning and testing the backboard; furthermore, the scanning speed is obviously improved under the condition that the number of the networks is more.

Description

technical field [0001] The invention relates to the detection technology of the switch backplane, in particular to a fast detection method for testing the backplane. Background technique [0002] Complex communication and circuit systems usually adopt a modular structure, and these "modules" with different functions are connected together through a common "backplane" to form the entire system. [0003] The backplane usually consists of connectors, resistors, capacitors, and the backplane PCB. Connectors are the most important components on the backplane, accounting for more than 95% of the components on the entire backplane, and quite a few backplanes even have only connectors. [0004] The test of the backplane is of great significance, whether it is in the design stage, production stage or maintenance stage, it is necessary to carry out accurate and fast tests on the backplane to determine whether the backplane is "normal"; if the backplane is not working properly , then...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R31/02G01R31/28
Inventor 赵云杰朱凌燕
Owner 上海携昌电子科技有限公司
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