Method for testing stability of electronic product

By establishing a multi-point grounding network model and adjusting the layout of ground network nodes, the problems of ground potential fluctuations and anti-interference capabilities of electronic products under instantaneous power shock are solved, and higher stability and anti-interference capabilities are achieved.

CN119689142AActive Publication Date: 2025-03-25SHENZHEN INSPECTION GRP (DONGGUAN) QUALITY TECH SERVICE CO LTD
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Patent Information

Application Number
CN202510192506.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-21
Publication Date
2025-03-25
Estimated Expiration
2045-02-21

AI Technical Summary

Technical Problem

Under the instantaneous power impact of switching power supply, the equipotential balance of the multi-point grounding network is destroyed, causing violent ground potential fluctuations, affecting the working state of the sensitive circuit, and decreasing the anti-interference ability.

Method used

By acquiring transient current propagation characteristics and node potential distribution data, a multi-point grounding network model is established, ground potential fluctuation trend is predicted, the coupling path of interfering signals is determined, the common mode rejection capability of sensitive circuits is evaluated, and the grounding network node layout is adjusted to optimize impedance matching and potential distribution.

Benefits of technology

It effectively improves the stability and anti-interference ability of electronic products in complex electromagnetic environments, reduces the fluctuation amplitude of ground potential, and improves the anti-common mode interference ability of sensitive circuits.

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Abstract

The invention provides a method for testing the stability of an electronic product, and the method comprises the steps: obtaining the propagation characteristic data of a transient current in a grounding network, building a multi-point grounding network model in combination with the potential distribution data of each node, inputting the potential of the nodes and the transient current data, and predicting the fluctuation trend of the ground potential through the multi-point grounding network model; according to the predicted ground potential fluctuation trend, extracting a coupling path of an interference signal in the grounding network when common-mode interference exists, and determining a main node and a propagation direction of interference signal propagation to obtain a sensitive circuit; calculating node potential distribution data of the grounding network after node layout, judging whether the potential difference between key nodes is within a preset range or not, and if the potential difference exceeds the preset range, refining network division, increasing equipotential connection or locally reducing grounding resistance; and determining a matching design scheme of the grounding network and the sensitive circuit according to the anti-interference capability, building a test platform, and testing stability data of the grounding system in different electromagnetic environments.
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