Optimization of Wall Thickness Monitoring Technology for High Temperature Pipelines Based on Ultrasonic Guided Waves

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Optimization of Wall Thickness Monitoring Technology for High Temperature Pipelines Based on Ultrasonic Guided Waves

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[1]ZHOU Juncen,GAN Fangji,WANG Siyu,et al.Optimization of Wall Thickness Monitoring Technology for High Temperature Pipelines Based on Ultrasonic Guided Waves[J].Journal of Zhengzhou University (Engineering Science),2024,45(04):140-146.[doi:10.13705/ j.issn.1671-6833.2024.04.006]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 45 Number of periods: 2024 04 Page number: 140-146 Column: Public date: 2024-06-16

Title:: Optimization of Wall Thickness Monitoring Technology for High Temperature Pipelines Based on Ultrasonic Guided Waves

Author(s):: ZHOU Juncen; GAN Fangji; WANG Siyu; ZHONG Tao; YANG Suixian; School of Mechanical Engineering, Sichuan University, Chengdu 610041, China

Keywords:: ultrasonic guided wave technology; high temperature pipeline; wall thickness measurement; sound ve locity correction; reliability of long-term monitoring

CLC:: TP23

DOI:: 10.13705/ j.issn.1671-6833.2024.04.006

Abstract:: Ultrasonic guided wave technology was often used for wall thickness monitoring system of high tempera ture pipelines because it could isolate the ultrasonic transducer from the high temperature environment. However, the failure of conventional coupling technology and the low signal-to-noise ratio of the signal at high temperature af fected the reliability and measurement accuracy of the measurement system. A waveguide rod was designed to con duct ultrasonic signals. Based on the acoustic matching principle, the dry coupling technology was optimized to solve the failure problem of conventional coupling technology in high temperature environment. The adaptive excita tion method and the power multiplication algorithm of measurement data were proposed to improve the adaptability and signal-to-noise ratio of the measurement system at high temperature. Intelligent segmentation of the speed of sound was used to correct the speed of sound, and the method made the measurement accuracy of the high-tempera ture ultrasonic guided wave thickness measurement system reach ±0.03 mm. The experimental results showed that the temperature of the ultrasonic transducer end was not more than 56 ℃ at the maximum under the environment of a long term heat source of 500 ℃, which verified the reliability of the measurement system in high temperature en vironments.

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Last Update: 2024-06-14