Page 59 - 无损检测2025年第三期

试验研究
试验研究

DOI：10.11973/wsjc240304

基于相关性分析的变温管道壁厚高精度监测方法

田宇航 ，伍剑波 ，胡 斌 ，沈 川 ，方 辉 1
2
1
1
1
（1. 四川大学 机械工程学院，成都 610065；2. 中国特种设备检测研究院，北京 100029）
摘 要：在管道壁厚腐蚀监测领域，压电超声技术具有重要地位。在利用压电超声进行管道壁
厚测量时，管道温度的变化会影响耦合剂的性能，导致回波幅值改变，而使得阈值法和基于包络线
分析的测定方法无法正确计算超声飞行时间，引起较大的壁厚测量误差。针对该问题，搭建了变温
管道压电超声壁厚测量系统，采用基于相关性分析的超声飞行时间测定方法计算超声波的飞行时
间，并通过温度-声速校正模型对超声声速进行补偿，进而提高变温管道壁厚的测量精度。结果表
明，所提方法的管道壁厚测量分辨率提高至 0. 01 mm，管道壁厚测量误差小于 0. 05 mm；所提方法
可实现温度-20 ℃至70 ℃的变温管道壁厚测量，能满足压电超声变温管道壁厚监测的要求。
关键词：压电超声;变温管道;壁厚监测;相关性分析;超声飞行时间

中图分类号：TG115.28 文献标志码：A 文章编号：1000-6656(2025)03-0029-06

High precision monitoring method of variable temperature pipe wall
thickness based on correlation analysis

TIAN Yuhang , WU Jianbo , HU Bin , SHEN Chuan , FANG Hui 1
1
2
1
1
（1. School of Mechanical Engineering, Sichuan University, Chengdu 610065, China;
2. China Special Equipment Inspection & Research Institute, Beijing 100029, China）
Abstract: In the field of pipe wall thickness corrosion monitoring, piezoelectric ultrasonic technology plays an
important role. When the pipe wall thickness is measured by piezoelectric ultrasound, the change of pipe temperature
will affect the performance of the ultrasonic coupling agent and lead to the change of the amplitude of the reflected
wave, which makes the ultrasonic time-of-flight cannot be calculated correctly by the threshold method and the envelope
analysis method, resulting in large wall thickness measurement errors. To solve this problem, a piezoelectric ultrasonic
wall thickness measurement system for variable temperature pipeline was built in this paper. Ultrasonic time-of-flight
measurement method based on correlation analysis was used to calculate ultrasonic time-of-flight, and the ultrasonic wave
velocity was compensated by temperature and wave velocity correction model, so as to improve the measurement accuracy
of variable temperature pipeline wall thickness. The results showed that the resolution of pipe wall thickness measurement
was increased to 0.01mm, and the measurement error of pipe wall thickness was less than 0.05 mm, and the proposed
measurement method could realize the measurement of pipe wall thickness at temperature ranging from －20 ℃ to 70 ℃
and meet the requirements of piezoelectric ultrasonic temperature variable pipe wall thickness monitoring.
Key words: piezoelectric ultrasound; variable temperature pipeline; wall thickness monitoring; correlation analysis;
ultrasonic time-of-flight

收稿日期：2024-07-08 石油化工管道是工业生产的生命线，承担着输
基金项目：四川省区域创新合作项目(2023YFQ0060)
送资源的重任，对保障生产的连续性与稳定性至关
作者简介：田宇航(1998—)，男，硕士研究生，主要研究方向为压
重要。但在化学侵蚀、高温高压的工作环境下，管
电超声检测仪器开发
道面临被腐蚀的严峻挑战 [1-2] 。对管道进行腐蚀监测
通信作者：伍剑波(1986—)，男，教授，博士生导师，主要研究方
向为无损检测与结构健康监测，wujianbo@scu.edu.cn 不仅能及时发现风险，防范泄漏事故，还能根据监
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2025 年 第 47 卷 第 3 期
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