Defect detection of the weld bead based on electromagnetic sensing

7th Sensors & their Applications

Abdullah, B.M.^1 ; Mason, A.^1 ; Al-Shamma'A, A.^1

School of Built Environment, Liverpool John Moores University, Henry Cotton Building, 15-21 Webster Street, Liverpool, L3 2ET, United Kingdom^1

关键词: Defect detection;    Electromagnetic sensors;    High quality;    Low costs;    Vision inspection;    Weld bead;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/450/1/012039/pdf
DOI  :  10.1088/1742-6596/450/1/012039

来源: IOP

【 摘 要 】

Characterization of flaws of weld bead is imperative for high-quality welding. Methods of weld bead inspection include radiographic, ultrasonic and vision inspection. However, such methods are costly and time consuming. The proposed sensor is light, low-cost and fast. This paper summarizes our work on weld bead monitoring and defect detection using an electromagnetic sensor. Measurements are acquired in the form of S-Parameters, specifically measuring changes in the reflected coefficient S11. The weld bead is scanned using the sensor and any form of weld bead defection such as undercutting and excessive penetration is detected and identified.