基于STM32的电池极耳焊缝微缺陷检测系统设计  

Research on Micro-defect Detection System of Battery Pole-ear Weld Based on STM32

作　　者：黄平[1] 马龙 李泰民 郑福印 张晓丹[1] 白石 HUANG Ping;MA Long;LI Taimin;ZHENG Fuyin;ZHANG Xiaodan;BAI Shi(School of Information Science and Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学信息科学与工程学院,辽宁沈阳110870

出　　处：《仪表技术与传感器》2023年第7期66-70,共5页Instrument Technique and Sensor

基　　金：辽宁省教育厅高等学校基本科研项目(面上项目)(LJKMZ20220477);国家自然科学基金项目(62001313);辽宁省自然科学基金项目(2020-MS-211)。

摘　　要：针对航空锂电池极耳焊缝微缺陷识别及分类研究,阐述了多频涡流层析成像检测机制及组成结构,提出采用多通道微型差分涡流检测线圈作为缺陷信号有效拾取介质,并基于STM32完成了高灵敏度励磁-检测探头、激励电路、锁相环电路以及信号调理采样电路的系统化设计。实验结果表明:该系统可有效识别航空锂电池极耳焊缝微缺陷(缺焊、多焊、气泡等),其中缺焊及气泡微缺陷导致扫面曲线出现上凸现象,而多焊微缺陷形成下凹趋势,整机电路方案为相关检测领域的缺陷检测提供了良好的实验基础。Aiming at the research on the identification and classification of micro-defects in the pole-ear weld of aviation lithium battery,the multi-frequency eddy current tomography detection mechanism and composition structure were described,and the multi-channel micro-differential eddy current detection coil was proposed as the effective pickup medium for the defect signal.The systematic design of the high-sensitivity excitation-detection probe,excitation circuit,phase-locked loop circuit and signal conditioning sampling circuit was completed based on STM32.The experimental results show that the system can effectively identify the micro-defects(lack of welding,multiple welding,bubbles,etc.)in the pole-ear weld of the aviation lithium battery,in which the lack of welding and bubble micro-defects lead to the convex phenomenon of the scanning curve,while the multi-welding micro-defects form the concave trend.Meanwhile,the whole machine circuit scheme provides a good experimental basis for the defect detection in the relevant inspection fields.

关 键 词：极耳焊缝 微缺陷 多频涡流 层析成像 差分涡流检测线圈 

分 类 号：TM937[电气工程—电力电子与电力传动]