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Design of a Rule-Based Solution Based on MFC for Inspection of the Hybrid Electronic Circuit Board  

Ko Yun-Seok (남서울대학 전자정보통신공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers D / v.54, no.9, 2005 , pp. 531-538 More about this Journal
Abstract
This paper proposes an expert system which is able to enhance the accuracy and productivity by determining the test strategy based on heuristic rules for test of the hybrid electronic circuit board producted massively in production line. The test heuristic rules are obtained from test system designer, test experts and experimental results. The guarding method separating the tested device with circumference circuit of the device is adopted to enhance the accuracy of measurements in the test of analog devices. This guarding method can reduce the error occurring due to the voltage drop in both the signal input line and the measuring line by utilizing heuristic rules considering the device impedance and the parallel impedance. Also, PSA(Parallel Signature Analysis) technique Is applied for test of the digital devices and circuits. In the PSA technique, the real-time test of the high integrated device is possible by minimizing the test time forcing n bit output stream from the tested device to LFSR continuously. It is implemented in Visual C++ computer language for the purpose of the implementation of the inference engine using the dynamic memory allocation technique, the interface with the electronic circuit database and the hardware direct control. Finally, the effectiveness of the builded expert system is proved by simulating the several faults occurring in the mounting process the electronic devices to the surface of PCB for a typical hybrid electronic board and by identifying the results.
Keywords
ICT(In-Circuit Tester); RLC Parallel Circuit; Electronic Board Test; Guarding Method;
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