钢轨超窄间隙焊接坡口宽度检测方法  

Measurement Method of Groove Width of Rail Ultra-narrow Gap Welding

作　　者：潘志刚 陈晓雷[1,2,3] 张爱华[1,2,3] 朱亮[4] PAN Zhigang;CHEN Xiaolei;ZHANG Aihua;ZHU Liang(College of Electrical and Information Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Gansu Advanced Control for Industrial Processes,Lanzhou 730050,China;National Demonstration Center for Experimental and Control Engineering Education,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学电气工程与信息工程学院,甘肃兰州730050 [2]甘肃省工业过程先进控制重点实验室,甘肃兰州730050 [3]兰州理工大学电气与控制工程国家级实验教学示范中心,甘肃兰州730050 [4]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050

出　　处：《热加工工艺》2021年第21期158-162,共5页Hot Working Technology

基　　金：国家自然科学基金项目(61866021);甘肃省科技计划项目(18YF 1WA068);兰州市人才创新创业项目(2016-RC-72)。

摘　　要：针对超窄间隙焊接坡口宽度为4~6 mm的结构特点,难以直接对坡口宽度进行测量,提出采用电涡流传感器进行非接触式测量的解决方案。首先,通过建立电涡流传感器探头线圈在超窄间隙坡口中的仿真模型,分析了探头线圈的各个参数对传感器性能的影响,并依此制作了电涡流传感器探头;其次,设计了合理的电涡流传感器信号调理电路;最后,利用最小二乘曲线拟合法完成了传感器的标定。该测量方案实现了超窄间隙焊接坡口宽度的精确测量,并给出了试验测试实例。实验结果表明:电涡流传感器能够准确地实现超窄间隙焊坡口宽度检测,其最大测量误差为0.078 mm。In view of the structural characteristics of the ultra-narrow gap welding groove width of 4-6mm,it is difficult to directly measure the groove width.A solution for non-contact measurement using eddy current sensor was proposed.Firstly,the simulation model of the eddy current sensor probe coil in ultra-narrow gap groove was established,the influence of various parameters of the probe coil on the sensor performance was analyzed,and the eddy current sensor probe was fabricated accordingly.Secondly,a reasonable signal conditioning circuit of eddy current sensor was designed.Finally,the calibration of the sensor was completed by the least square curve fitting method.The measurement scheme realizes the accurate measurement of the width of the ultra-narrow gap welding groove,and gives an experimental test example.The experimental results show that the eddy current sensor can accurately detect the width of the ultra-narrow gap welding groove,and the maximum measurement error is 0.078 mm.

关 键 词：超窄间隙焊接 坡口宽度 电涡流传感器 最小二乘法 

分 类 号：TG409[金属学及工艺—焊接]