管道的在线监测型自校正超声波测厚技术  

Ultrasonic Thickness On-line Monitoring Technique with Self-Calibration of Pipeline

作　　者：罗建 甘芳吉[1] 张轶茗 廖俊必[1] 王少纯 LUO Jian;GAN Fangji;ZHANG Yiming;LIAO Junbi;WANG Shaochun(l.School of Manufacturing Science and Engineering, Siehuan University, Chengdu 610065, China;Safety, Environment Technology Supervision Research Institute, Southwest Oil ~ Gas Company, PetroChina Co., Ltd., Chengdu 610041, China)

机构地区：[1]四川大学制造科学与工程学院,成都610065 [2]中石油西南油气田分公司安全环保与技术监督研究院,成都610041

出　　处：《无损检测》2017年第11期48-52,78,共6页Nondestructive Testing

基　　金：国家自然科学基金资助项目(61271329);四川省科技支撑计划资助项目(2012GZ0094);中国石油科技创新基金资助项目(2015D-5006-0607)

摘　　要：提出了一种具有自校正功能的超声波测厚技术,该技术可以有效消除温度变化等对声速的影响,还可用于在线监测油气金属管道腐蚀情况等。利用快速傅里叶变换滤除了自校正超声波中的干扰杂波,然后选取回波信号的多个极值点来准确计算管道的厚度。结果表明,该自校正超声波测厚技术具有良好的检测精度和稳定性。This paper proposed a new ultrasonic thickness measurement technology with self-calibration function which could effectively eliminate the influence of temperature variation on sound velocity so that it could on-line monitor the corrosion condition of metal pipeline of oil and gas. In this paper,the fast Fourier transform（ FFT） was used to filter out the interference clutter in the self-calibration ultrasonic wave,and then multi-extrema of the echo signal were selected to calculate the thickness of the measured object. It is proven that the self-calibration ultrasonic thickness measurement technology in this paper has good detection precision and stability.

关 键 词：超声波检测 自校正 多极值点 监测 

分 类 号：TE973[石油与天然气工程—石油机械设备] TG115.28[金属学及工艺—物理冶金]