Online Monitoring of Pipe Wall Thinning by Electromagnetic Acoustic Resonance Method
Online Monitoring of Pipe Wall Thinning by Electromagnetic Acoustic Resonance Method
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发表时间：
2013
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通讯作者：
R. Urayama;T. Takagi;T. Uchimoto
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作者：
R. Urayama;T. Takagi;T. Uchimoto
电磁共振（EMAR）方法在高温环境下提供准确、稳定的评估，是在线监测的有效工具。本研究将EMAR方法和叠加n次压缩（SNC）进行数据处理应用于管道壁减薄的在线监测，并通过大型高温腐蚀试验回路的现场测试证明了测量的准确性和可靠性。为了测量复杂壁厚减薄的管道的厚度，SNC 从 EMAR 的光谱响应中提取厚度信息。监测测试结果表明，EMAR与SNC可以在165oC下评估管道壁减薄，精度为10μm。此外，评估厚度的时间评估在整个测试持续时间内单调递减，这表明该测量技术的高稳定性。
The electromagnetic acoustic resonance (EMAR) method provides accurate and stable evaluation in high temperature environment, and it is an effective tool for online monitoring. In this study, the EMAR method and the superposition of the n-th compression (SNC) for data processing are applied to online monitoring of pipe wall thinning, and the accuracy and reliability of the measurements are demonstrated through field tests using a large-scale corrosion test loop at high temperature. To measure the thickness of pipes with complicated wall thinning, the SNC extracts thickness information from the spectral responses of the EMAR. Results from monitoring test show that EMAR with SNC can evaluate pipe wall thinning with an accuracy of 10 m at 165oC. In addition, time evaluation of evaluated thickness decreases monotonically all over the test duration, which indicates high stability of this measurement technique.