Circuit board health condition monitoring method based on volt-ampere characteristic curves

Abstract

The invention discloses a circuit board health condition monitoring method based on volt-ampere characteristic curves. The method includes: data completeness can be guaranteed while a representing method of a digital image is applied to a volt-ampere characteristic curve between any two points on a circuit board for storage, and node grouping curves serve as characteristic information of the circuit board in a manner of a circuit gray graph. Voltage and current data in the volt-ampere characteristic curves are subjected to per unit processing, all curves formed by element pins are classified according to nodes, the curves are respectively subjected to aliasing according to the nodes, placement in each pixel region is summed up to be represented as gray, a set of all pixels forms the digital image of characterization node inherent characteristic, and correlation of the circuit gray graphs of the nodes under different statuses is determined to judge health condition of the circuit board. By the circuit board health condition monitoring method, conversion and compression of mass data are achieved, storage scale of the data is downsized greatly, and speed, efficiency and accuracy of monitoring the circuit board health condition are increased.

Description

technical field [0001] The invention relates to a method for monitoring the health state of circuit boards based on volt-ampere characteristic curves, which belongs to the technical field of testing and diagnosis, and is applicable to monitoring the health state of any circuit boards, and realizes the volt-ampere characteristic curve between any two points of the circuit board according to the The way of node grouping is expressed in the form of digital image, and the health status of the circuit board is judged by the mutual correlation of the node digital image. Background technique [0002] In recent years, there are more and more various circuit boards, and the technologies involved are becoming more and more complex. The corresponding circuit board health status monitoring is also becoming more and more difficult, especially for those without circuit schematic diagrams and related materials. It is even more difficult to complete the health status monitoring of circuit b...

AI Technical Summary

Problems solved by technology

Fourth, the volt-ampere characteristic curve can be tested for any two pins of the component, and the information content is extremely rich

At present, there are many instruments on the market that can complete the test of the volt-ampere characteristic curve of the circuit board (circuit online maintenance tester), but there is a problem in all of them, that is, the measured volt-ampere characteristic curve data can only be displayed in real-time graphics. It is up to the user to compare the similarities and differences of the measured volt-ampere characteristic curves with the naked eye to judge whether the electronic components are good or bad, or to store the original data in the computer as a reference standard for future monitoring, and it is also up to people to complete the comparison of various data , and the data storage is huge, which is very inconvenient for the monitoring and management of the circuit board status, and it is impossible to complete the automatic monitoring of the circuit board health status through such a huge amount of data

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