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Product test method based on adjacent unit double faults

A product testing, dual-fault technology, applied in the field of testing, can solve the problems of multiple failure modes without diagnostic ability evaluation and diagnosis strategies, establishment methods, etc.

Inactive Publication Date: 2012-01-04
北京恒兴易康科技有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, there is no effective diagnostic capability evaluation and diagnostic strategy establishment method for the multiple fault mode of adjacent unit double faults

Method used

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  • Product test method based on adjacent unit double faults
  • Product test method based on adjacent unit double faults
  • Product test method based on adjacent unit double faults

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0124] The method of the present invention is illustrated by selecting an automobile detection device as an example. The device includes 9 fault units and 7 tests, and its composition and description are shown in Table 6 and Table 7.

[0125]Table 6 Composition and description of faulty units of a certain vehicle detection device

[0126] serial number

Faulty unit name

simplified name

1

CB513 socket

F1

2

WP7 power branch line

F2

3

CA-Panel

F3

4

WP9 power branch line

F4

5

WP8 power branch line

F5

6

Engine wiring harness

F6

7

engine bearing

F7

8

green label

F8

9

chip detector

F9

[0127] Table 7 Test composition and description of an automobile testing device

[0128] serial number

test name

simplified name

test description

1

WP9 power branch line_Tp1

...

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Abstract

The invention discloses a product test method based on adjacent unit double faults. The product test method comprises the following specific steps: (1) establishing an adjacent unit double fault set of a system according to a correlation model of the system; (2) establishing and simplifying the adjacent unit double fault correlation matrix of the system to obtain a simplified matrix; (3) evaluating the adjacent unit double fault diagnosis capability of the system; (4) optimizing a test for fault detection and establishing the detection policy of the adjacent unit double faults; (5) optimizing a test for fault isolation and establishing the isolation policy of the adjacent unit double faults; and (6) carrying out a product test. According to the invention, a system fault diagnosis theory of single fault is expanded to the multi-fault mode of the adjacent unit double faults on the basis of correlation model of the system; and by establishing the adjacent unit double faults, the identification method of the adjacent unit double fault of the system is provided, and the correlation matrix of the adjacent unit double faults of the system is established.

Description

technical field [0001] The method of the invention relates to a product testing method based on double faults of adjacent units, and belongs to the technical field of testing. Background technique [0002] Correlation theory is an important method widely used in the field of testability design. Correlation theory is based on the assumption of single fault, builds the correlation model of system fault unit and test on the basis of system correlation graphical model, and optimizes the test sequence through correlation reasoning, and obtains the optimized diagnosis strategy. Through this theoretical method, the diagnosis strategy can be formulated quickly and efficiently, and the rapid diagnosis of system faults can be realized. [0003] In engineering practice, the system often has multiple faults, and the diagnosis is relatively complicated. The original mature diagnosis method based on the assumption of single fault is not suitable for the field of multiple faults. When th...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 石君友李海伟王璐
Owner 北京恒兴易康科技有限公司
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