Ultrasonic Thickness Inspection of Oil Pipeline Based on Marginal Spectrum of Hilbert-Huang Transform

摘要：

Measurement of pipeline wall thickness is one of the main contents of nondestructive inspection on offshore oil pipeline. A novel approach based on the marginal spectrum of the Hilbert-Huang transform is proposed for ultrasonic echo signal processing. The demodulated ultrasonic echo signal contains the thickness information of pipeline wall, which is an approximately periodic signal. The marginal spectrum is obtained by applying Hilbert-Huang transform to the ultrasonic echo signal. It effectively reveals the information of wall thickness of pipeline. The relation between the main frequency and the wall thickness of pipeline is established to calculate the wall thickness. The validity and the robustness of the proposed method are shown by signals collected by ultrasonic pipeline intelligent gage.

关键词： marginal spectrum Hilbert-Huang Transform ultrasonic thickness inspection pipeline inspection ultrasonic signal processing

作者: Yimei MAO Peiwen QUE Qi ZHANG

作者单位: Department of Instrument Science and Engineering, Shanghai Jiaotong University;Shanghai, P.R.China

会议类型: 国际会议

会议名称: 第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)

会议地点: 上海

会议语种:英文

页码: 975-982

在线出版日期: 2008-10-25（万方平台首次上网日期，不代表论文的发表时间）