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Circuit board test design and relevant matrix establishing method based on fault effect data in FMEA

A technology of correlation matrix and establishment method, applied in the field of circuit board test design and correlation matrix establishment, to achieve the effects of quick fault diagnosis, high fault detection rate, avoidance of analysis process and the use of special tools

Active Publication Date: 2014-05-14
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no method to use FMEA data to directly establish a circuit board test set and correlation matrix for fault diagnosis

Method used

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  • Circuit board test design and relevant matrix establishing method based on fault effect data in FMEA
  • Circuit board test design and relevant matrix establishing method based on fault effect data in FMEA
  • Circuit board test design and relevant matrix establishing method based on fault effect data in FMEA

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Embodiment

[0147] The method of the present invention will be described below by taking a certain processor circuit board as an example.

[0148] The functional block diagram of the main circuit of the processor in the embodiment of the present invention is as follows: image 3 As shown, the functional sub-circuit is divided into five modules according to the structure and function of the circuit: processor monitoring module (number 01), including hardware watchdog circuit, TMS320F240, etc.; CPU and logic synthesis module (number 02), including system clock , drive circuit, reset circuit, programmable logic circuit, etc.; serial communication module (No. 03), including local bus, RS422, etc.; memory module (No. 04), including SRAM expansion circuit, NVM expansion circuit, etc.; external interface module ( No. 05), including multi-function interface circuits, etc.

[0149] Step 1: According to the FMEA data of the circuit board, establish a failure mode and effect association table.

[...

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Abstract

The invention discloses a circuit board test design and relevant matrix establishing method based on fault effect data in FMEA for the fault diagnosis field. The method includes the steps of establishing a fault mode and effect association table through FMEA data of a circuit board, establishing a logical association matrix of an initial test set and an initial test and a logical association matrix of fault modes and the initial test according to the upper layer effect, determining faults which can not be detected and ambiguity group faults in the initial test, establishing a detection supplement test set and an isolation supplement test set according to local effect of the faults which can not be detected and the ambiguity group faults, setting up a logical association matrix of the faults which can not be detected and the ambiguity group faults and a logical association matrix of the ambiguity group faults and an isolation supplement test, conducting combination and arrangement to obtain a circuit board integrity test set and a circuit board fault mode and test relevant matrix so as to conduct circuit board tests and fault diagnosis. By means of the circuit board test design and relevant matrix establishing method, the highest fault detect rate is ensured, test points which can be easily measured are selected preferentially, and fault diagnosis on the circuit board can be conveniently and rapidly conducted.

Description

technical field [0001] The invention belongs to the field of fault diagnosis, in particular to a method for circuit board test design and correlation matrix establishment based on fault impact data in FMEA. Background technique [0002] The correlation matrix expresses the correlation relationship between the failure mode of the circuit board component unit and the test in the form of a matrix. According to the correlation matrix, not only the fault detection and fault isolation of the circuit board testability design can be evaluated, but also the fault diagnosis can be carried out according to the actual test results. At present, the correlation matrix is ​​obtained through testability modeling and analysis work, and the input data of testability modeling generally includes failure modes of circuit boards, planned tests, etc. Among them, the failure mode is mainly obtained through the failure mode effect analysis (FMEA), and the test is mainly designed and planned based o...

Claims

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Application Information

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IPC IPC(8): G01R31/28G06F17/50
Inventor 石君友彭银银安蔚然
Owner BEIHANG UNIV
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