面向旋转工件磨损检测的三线圈差动式电涡流位移传感技术  

Three-Coil Differential Eddy-Current Displacement Sensing Technology for Rotating Workpiece Wear Detection

作　　者：卢祎迪 赵金库[2] 赵玉峰 王鹏[1] LU Yidi;ZHAO Jinku;ZHAO Yufeng;WANG Peng(Department of Precision Instrument,Tsinghua University,Beijing 100084,China;Heilongjiang North Tool Co.,Ltd.,Mudanjiang 157000,China)

机构地区：[1]清华大学精密仪器系,北京100084 [2]黑龙江北方工具有限公司,黑龙江牡丹江157000

出　　处：《工业技术创新》2023年第5期1-11,共11页Industrial Technology Innovation

摘　　要：工业场景中广泛存在对旋转工件磨损情况进行在线检测的需求,电涡流是其中一种重要的非接触式磨损检测方法。为克服传统单线圈结构电涡流位移传感器在量程—直径比和复杂工况下抗电磁环境干扰能力上的局限性,提出面向旋转工件磨损检测的三线圈差动式电涡流位移传感技术。通过优化三线圈同轴等距排列的电涡流位移传感器结构,设计基于数字电路的传感系统信号控制和信号处理模块,扩大了电涡流位移传感器的量程比,提高了传感信号的信噪比。在1:1还原的实验装置上进行测试,表明该技术可以实现24 mm的量程和0.01 mm的分辨率,可以满足对盾构机滚刀进行在线磨损检测的需求。There is a widespread demand for the online wear detection of rotating workpiece in the industrial scenes,in which eddy-current is one of the important non-contact wear detection methods.In order to overcome the limitations of range-diameter ratio in traditional eddy-current displacement sensor with single-coil structure and anti-electromagnetic interference ability under complex working conditions,a three-coil differential eddy-current displacement sensing technology was proposed for the rotating workpiece wear detection.By optimizing the structure of the eddy-current displacement sensor with three coils arranged coaxially and equidistantly,the signal control and processing module of the sensing system based on the digital circuit was designed,which expanded the range ratio of the eddy-current displacement sensor and improved the signal-to-noise ratio of the sensing signal.The test on the l:l recovery experimental device shows that the technology can achieve a measuring range of 24 mm and a resolution of o.0l mm,which can meet the demands of online wear detection of the hob of a shield machine.

关 键 词：旋转工件 磨损检测 电涡流位移传感器 量程 抗干扰 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]