现代电子技术及焊接控制技术的新发展,推动了焊缝自动跟踪技术及设备的更新换代。一般地说,焊缝跟踪传感器分为两大类:接触式或非接触式。由于焊接施工条件等原因,使得非接触式传感器如电磁式、红外式、激光扫描式、电感应式、计算机图象识别式等技术的应用受到很大限制,加之上述控制方法抗干扰能力差、成本高、原理比较复杂,因此近几年来,抗干扰性能好、价格低廉的接触式传感器在国 The new development of modern electronic technology and welding control technology has promoted the automatic tracking of welds and the upgrading of equipment. In general, weld tracking sensors fall into two broad categories: contact or non-contact. Due to welding construction conditions and other reasons, non-contact sensors such as electromagnetic, infrared, laser scanning, inductive, computer image recognition and other technologies have been greatly limited the application, combined with the anti-interference ability of the above control method is poor, High cost, the principle is more complex, so in recent years, anti-jamming performance, low price contact sensors in the country