The Influence of Transportation Environment on the Quantization Accuracy of Ultrasonic Internal Detection

doi:10.11885/j.issn.1674-5086.2024.01.15.02

Abstract

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

CLC Number:

TE832

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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