基于脉冲涡流的提离高度检测方法  

Research on lift-off measurement based on pulsed eddy current

作　　者：殷雪峰[1] 程千里[1] 窦凤杰 崔建杰 YIN Xuefeng;CHENG Qianli;DOU Fengjie;CUI Jianjie(SINOPEC Qingdao Refining&Chemical Co.,Ltd.,Qingdao 266500,China;Tianjin Tems Technology Co.,Ltd.,Tianjin 300131,China)

机构地区：[1]中国石化青岛炼油化工有限责任公司设备工程部,山东青岛266500 [2]天津特米斯科技有限公司,天津300131

出　　处：《压力容器》2021年第9期81-86,共6页Pressure Vessel Technology

基　　金：中国石油化工股份有限公司技术开发项目“穿透保温层与防腐层的脉冲涡流技术开发及应用研究”(CLY19112)。

摘　　要：通过分析脉冲涡流检测信号,发现在双对数坐标系中,中期信号直线段的截距与提离高度之间存在幂函数关系,提出了保温层厚度测量的新方法。经过试验验证,该方法不受被测构件壁厚和发射电压影响,具有稳定性高的特点,扩充了脉冲涡流检测技术的应用范围,提高了利用脉冲涡流检测技术穿透保温层检测管道或设备壁厚的准确性。It is found that there is a power function relationship between the medium signal intercept and the lift-off in the log-log coordinate system through analysis of the pulsed eddy current signal,and a new method for measuring the insulation layer thickness was proposed.The experimental results show that the method is not affected by the wall thickness and excitation voltage of the component,and it has the characteristics of high stability.This method extends the application range of pulsed eddy current technology and improves the accuracy of detecting the wall thickness of pipeline or equipment through the insulation layer using pulsed eddy current detection technology.

关 键 词：脉冲涡流 保温层厚度 提离高度 中期信号截距 

分 类 号：TH49[机械工程—机械制造及自动化] TG115.28[金属学及工艺—物理冶金]