管输环境对超声内检测量化精度的影响分析

doi:10.11885/j.issn.1674-5086.2024.01.15.02

摘要/Abstract

摘要： 超声内检测以其操作简单、检测准确等优点，在管道检测与监测领域取得广泛应用。回波信号中蕴含大量信息，但工况环境变化会对回波信号产生影响。为探究管输压力或流量变化对壁厚检测精度的影响，借助超声内检测模拟实验系统开展实验。使管道处于不同管输条件下，采集超声内检测信号，提取特征参量以分析回波信号的波动情况，利用渡越时间法反演计算了管道壁厚，并分析了不同管输环境对壁厚计算精度的影响。发现随着管输压力或流量的变化，回波信号接收的时间会提前或延迟，幅值存在波动，壁厚精度误差波动在-0.71%~0.96%，表明管流状态(0.3~1.2 MPa，8.129~15.023 m³/h)对壁厚检测精度无明显影响，可忽略管输环境对超声内检测管道壁厚精度的影响，为超声内检测数据的准确分析提供了理论支撑。

关键词: 超声内检测, 回波信号, 渡越时间, 幅值比, 壁厚

Abstract: Ultrasonic internal detection has been widely used in the field of pipeline detection and monitoring due to its advantages of easy operation and accurate detection. The echo signal contains a lot of information, but the change of working conditions will affect the echo signal. In order to explore the influence of pipe pressure or flow rate on the measurement accuracy of wall thickness, an ultrasonic internal detection simulation experiment system was used to carry out experiments. Under different pipeline transport conditions, ultrasonic internal detection signals are collected and characteristic parameters are extracted to analyze the fluctuation of echo signals. The wall thickness of the pipeline is calculated by using the transit-time method, and the influence of different pipeline transport environments on the calculation accuracy of wall thickness is analyzed. The results show that with the change of pressure and flow rate, the moment of receiving the echo signal is advanced or delayed, and its amplitude fluctuates. The fluctuation range of the wall thickness accuracy error is between -0.71% and 0.96%. This indicates that the pipe flow state (0.3~1.2 MPa, 8.129~15.023 m³/h) has no significant influence on the measurement accuracy of wall thickness, and the influence of pipeline transportation environment on the accuracy of ultrasonic internal detection of pipe wall thickness can be ignored, which provides theoretical support for accurate analysis of ultrasonic internal detection data.

Key words: ultrasonic internal detection, echo signal, transit time, amplitude ratio, wall thickness

中图分类号:

TE832

蔡亮学, 郑月俊, 卢逸峰, 徐广丽. 管输环境对超声内检测量化精度的影响分析[J]. 西南石油大学学报(自然科学版), 2025, 47(6): 168-177.

CAI Liangxue, ZHENG Yuejun, LU Yifeng, XU Guangli. The Influence of Transportation Environment on the Quantization Accuracy of Ultrasonic Internal Detection[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2025, 47(6): 168-177.

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