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Circuit board fault detection method and device

A fault detection and circuit board technology, applied in the direction of electronic circuit testing, etc., can solve problems such as inapplicable detection, and achieve the effects of easy identification, improved troubleshooting rate, and efficient and accurate detection

Active Publication Date: 2020-10-02
GUANGZHOU SAT INFRARED TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this infrared thermal imaging detection technology is not suitable for the detection of circuit boards passing weak currents such as smartphones

Method used

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  • Circuit board fault detection method and device
  • Circuit board fault detection method and device
  • Circuit board fault detection method and device

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Embodiment Construction

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0023] Those skilled in the art will understand that the singular forms "a", "an", "said" and "the" used herein may also include plural forms unless otherwise specified. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be unde...

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Abstract

The invention provides a circuit board fault detection method, comprises setting a power-on duration and a detection duration after power-off, setting a period M of acquiring infrared energy data and / or a number N of acquiring infrared energy data per period, acquiring a test M periods of infrared in each period. The energy data and the infrared energy data during the N power-down periods are respectively subtracted, and then the N subtraction results of each period are accumulated, and the results of the M periods are accumulated to obtain the difference infrared energy data. The same processing is performed on the standard circuit board. Obtaining the difference infrared energy data, and comparing the difference infrared energy data of each pixel of the test board with the difference infrared energy data of each pixel of the standard circuit board to find the abnormal point.

Description

technical field [0001] The present invention relates to a circuit board detection method and equipment, and more specifically, to a fault detection method and equipment suitable for circuit boards passing weak currents such as smart phones and smart watches. Background technique [0002] At present, industries such as smart machinery, smart phones, and smart watches are developing rapidly, especially smart phones. The growing demand for huge smart devices has also expanded the use of various circuit boards. In the face of circuit boards with extremely large orders of magnitude, troubleshooting and ensuring the pass rate have become difficult problems that major manufacturers must face. [0003] Common PCB circuit board failures are mainly concentrated on components, such as capacitors, resistors, inductors, diodes, triodes, etc. The damage of some electronic components can be observed with the naked eye, but as mentioned above, the damage of resistors, capacitors, transist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/28
CPCG01R31/28
Inventor 招其良
Owner GUANGZHOU SAT INFRARED TECH CO LTD