Two-point VI curve scanning comparison fault diagnosis method for various circuit boards

A fault diagnosis, circuit board technology, applied in the direction of electronic circuit testing, measuring electricity, measuring electrical variables, etc., can solve problems such as general detection technology without maintenance

Inactive Publication Date: 2018-10-23
曹一宁
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Problems solved by technology

[0006] To sum up, in the face of the maintenance of equipment circuit boards without pictures and data, there is no general inspection technology that can directly perform maintenance

Method used

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Embodiment Construction

[0024] The dual-point VI curve scanning comparison fault diagnosis method for various circuit boards of the present invention comprises the following steps:

[0025] A. Prepare a fault-free standard board that is the same as the circuit board that needs to detect its fault, and the circuit of the standard board does not need to be grounded;

[0026] If there are multiple circuit boards that need to be inspected and repaired, one or more circuit boards can be prepared for each type of circuit board, and the two-point VI curve information of each type of circuit board and the associated VI curve information can be collected in advance according to the following steps The position coordinates of the detection points of the two VI curves are stored for future use, which can bring convenience to the efficient detection of various circuit boards in the future;

[0027] B. Use each exposed conductive part on the board surface of the standard board as the detection point of the VI cur...

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Abstract

A two-point VI curve scanning comparison fault diagnosis method for various circuit boards comprises the following steps of preparing a faultless standard board which is the same with the circuit board whose fault needs to be detected; taking each exposed conductive portion on the board surface of the standard board as the detection point of a VI curve; detecting two-point VI curve information between the detection point of each VI curve on the standard board surface and the detection points of the other VI curves on the standard board surface, and storing the measured two-point VI curve information of the standard board and the position coordinates of the detection points of the two associated VI curves; and according to the position coordinates of the stored detection points of each VI curve on the standard board, arranging the detection points of the VI curve on the board surface of the circuit board to be detected which needs to be detected. The invention aims at providing the two-point VI curve scanning comparison fault diagnosis method for various circuit boards, and the method can be used to carry out fault detection on a circuit board card without a graph and without data under the condition that circuit board welding spot distribution, a circuit work principle and functions do not known.

Description

technical field [0001] The invention relates to a fault diagnosis method for scanning and comparing double-point VI curves of various circuit boards. Background technique [0002] With the increase of various electronic equipments, the technologies adopted are becoming more and more complicated. Therefore, higher requirements are put forward for the maintenance support ability of the equipments. The existing methods for repairing circuit boards mainly include direct observation method, principle analysis method, exchange method, measurement comparison method, fault model method, etc. Among them, the direct observation method refers to locating the fault range to a certain device or a certain circuit board as much as possible according to various abnormal phenomena when the circuit fails, which requires experienced maintenance personnel and strong judgment ability; principle The analysis method refers to analyzing the logical relationship and characteristic parameters of eac...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/28
CPCG01R31/2836
Inventor 曹勇邵思杰曹一宁谷兴龙唐欣炽王飞熊伟何凯平容晓龙
Owner 曹一宁
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