A method of auto-detecting is presented foI theflaw in ring-shaped welding seam of welded powder canister,and the author designs multiple-input single-output circuitand characteristic abstract circuit.

• 结合多年科研工作，提出了焊接药筒环焊缝超声自动检测方法和系统设计方案，并设计了多输入-单输出电路，特征提取电路。