一种背钻孔缺陷检测方法及装置
By using ultrasonic waves to detect echo signals from both sides of a printed circuit board and combining this with adaptive filtering technology, the accuracy and safety issues of back-drilling inspection are solved, achieving non-destructive and efficient defect detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SUZHOU VEGA TECH CO LTD
- Filing Date
- 2022-04-22
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for back borehole inspection suffer from problems such as incomplete coverage by destructive measurements, time-consuming complex algorithms, and radiation risks, resulting in low detection accuracy and health hazards.
Ultrasonic waves are used to detect the back drill hole and the surrounding area from opposite sides of the test plate. The echo signals are obtained. Combined with the number of target copper layers, the copper layer depth is accurately located by adaptive filtering technology. The depth of the back drill hole and the copper layer depth are compared to determine the defects.
It enables non-destructive testing, improves testing accuracy, reduces costs, avoids radiation damage to testing personnel, and simplifies the operation process.
Smart Images
Figure CN114923985B_ABST