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Board level testing system

A technology of board-level testing and test stimulation, which is applied in the direction of electronic circuit testing, comprehensive factory control, and comprehensive factory control, to achieve the effects of reducing work intensity, improving efficiency, and high use value

Active Publication Date: 2011-01-05
TRAFFIC CONTROL TECH CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The second technical problem to be solved by the present invention is: how to ensure that the test excitation signal is provided to the circuit board to be tested only when testing, and the test excitation signal is not output to the circuit board to be tested when the circuit board to be tested is plugged and unplugged; Acquisition of test output signals will not adversely affect the board under test

Method used

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Embodiment Construction

[0057] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0058] 1. Board-level test requirements analysis

[0059] When implementing board-level testing, the principle is that computer automatic testing must be implemented in this way. Although the implementation of fully automatic testing is more complicated, this method can greatly improve testing efficiency.

[0060] However, it should be noted that some tests, such as: whether the indicator light is on, whether the brightness is consistent, etc., due to the high cost of selecting sensors, fully automatic testing is difficult to achieve. At this time, it will be much simpler if it is assisted by manual processing. In other words, these tests, such as computer-aided semi-auto...

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Abstract

The invention discloses a board level testing system which comprises a testing upper computer, a testing controller and a subrack back panel, wherein the testing upper computer is connected with the testing controller through a data acquisition card and connected with a circuit board to be tested through an Ethernet and RS-232 which are provided by the testing upper computer and RS-485 and RS-422 which are provided by a data communication card; the testing controller is respectively connected with the data acquisition card in the testing upper computer and the subrack back panel and used for carrying out level conversion on an excitation signal required by testing and a testing output signal so as to provide a controlled power supply for the circuit board to be tested and a level conversion circuit; and the subrack back panel is respectively connected with the testing controller and the circuit board to be tested so as to accommodate a testing subrack of the circuit board to be tested. The system can guarantee the protection of the circuit board to be tested during the board level testing, is a computer aid based full-automatic or semi-automatic testing system, can reduce the working intensity of testing personnel, improve the efficiency and reduce testing human error and has higher use value especially for circuit boards with complicated functions.

Description

technical field [0001] The invention relates to the field of control system testing, in particular to a board-level testing system. Background technique [0002] For control systems, especially safety-critical systems, testing is an important guarantee for system functions, performance, reliability and security, and is also an important means of maintenance during normal operation. [0003] Among various tests, board-level testing is the most basic, and mainly completes the testing of circuit boards. In many cases, the composition of the system is complex, and the complete function requires all the circuit boards to cooperate together. If the circuit board is not fully tested, it is impossible to discover all the design, processing, production, etc. by the whole machine test. defects in the process. [0004] From the perspective of the current structure of the control system, the board-level test should be carried out for the following types of circuit boards: [0005] Th...

Claims

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Application Information

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IPC IPC(8): G05B19/418G01R31/28
CPCY02P90/02
Inventor 郜春海袁彬彬马连川王悉
Owner TRAFFIC CONTROL TECH CO LTD
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