基于FMCW调频测距的焊件位置声场检测技术研究  

Study on Sound Field Detection Technology of Weldment Position Based on FMCW Frequency Modulation Ranging

作　　者：路林 陈雁忠 李昌发 LU Lin;CHEN Yanzhong;LI Changfa(School of Mechanical Engineering,Shenyang University,Shenyang 110044,China;Jiangsu Xingda Steel Cord Co.,Ltd.,Xinghua 225721,China;Dana Management(Shanghai)Co.,Ltd.,Shanghai 200030,China)

机构地区：[1]沈阳大学机械工程学院,辽宁沈阳110044 [2]江苏兴达钢帘线股份有限公司,江苏兴化225721 [3]德纳管理(上海)有限公司,上海200030

出　　处：《热加工工艺》2022年第15期107-111,共5页Hot Working Technology

基　　金：辽宁省自然科学基金计划重点项目(20170520094);上海汽车工业科技发展基金会项目(2009)。

摘　　要：气电立焊中焊件位置是保证焊接过程顺利进行的重要准备工作之一。采用车载扬声器和传声器组成声波发送和接收阵列,结合调频连续波(frequency modulated continuous wave,FMCW)雷达的测距原理和解调算法,对声波信号进行处理,设计开发了一种基于FMCW调频测距的焊件位置检测系统。重建焊件位置图像,通过发送不同分贝的声波信号,计算重建图像感兴趣区域(region of interest,ROI)的平均灰度值,进而获取重建图像ROI的平均灰度值与不同声波分贝的关系,然后对重建图像进行二值化处理和非连通区域间隙测量,建立了图像中非连通区域与焊件位置的关系。结果表明,所开发的焊件位置检测系统对焊件形状和焊件位置的识别具有良好的实用性和准确性。The weldment position in electro gas welding(EGW) is one of the important preparations to ensure the welding process.Using vehicle-mounted speakers and microphones to form a sound wave transmitting and receiving array,combined with the ranging principle and demodulation algorithm of frequency modulated continuous wave(FMCW) radar,the sound wave signal was processed,and a weldment position detection system based on FMCW frequency modulation ranging was designed and developed.The position image of the weldment was reconstructed,the average gray value of the region of interest(ROI) of the reconstructed image was calculated by sending different decibel acoustic signals,and the relationship between the average gray value of the reconstructed image ROI and different sound wave decibels was obtained,then the binarization of the reconstructed image and measurement of the gap between the unconnected areas were carried out,the relationship between the unconnected area in the image and the position of the weldment was established.The results show that the developed weldment position detection system has good practicability and accuracy in identifying the shape and position of the weldment.

关 键 词：调频连续波 焊件位置 测距 气电立焊 

分 类 号：TG409[金属学及工艺—焊接]