A new acoustic positioning method for buried PE pipeline based on time-domain superposition

被引：0
|
作者：
Ge L. [1 ]
Wang T. [1 ]
Xiao X. [2 ]
Wu J. [1 ]
Mark R. [3 ]
Zhuo Y. [4 ]
Yang G. [1 ]
机构：
[1] School of Mechanical and Electronic Engineering, Southwest Petroleum University, Sichuan, Chengdu
[2] School of Electrical Engineering and Information, Southwest Petroleum University, Sichuan, Chengdu
[3] School of Engineering, Newcastle University, Newcastle
[4] Gas Branch, PetroChina Southwest Oil & Gasfield Company, Sichuan, Chengdu
来源：
Natural Gas Industry | 2022年 / 42卷 / 09期
关键词：
Acoustic detection; Elastic wave waveform conversion; Finite element analysis; Imaging positioning; On-site PE pipe positioning test; PE pipe positioning; Time-domain superposition;
D O I：
10.3787/j.issn.1000-0976.2022.09.011
中图分类号：
学科分类号：
摘要：
Polyethylene (PE) pipes are widely used in the construction of medium and low pressure buried gas pipeline networks in cities and towns due to their advantages of corrosion resistance and long service life. However, the pipeline information system is imperfect and the existing buried PE pipeline positioning technologies are not well developed, so pipeline positioning is not clear and pipelines are damaged easily during construction. In this paper, a theoretical model of elastic wave propagating in soil-PE pipeline medium is established based on the reflection principle of elastic wave. Then, a new buried PE pipeline positioning method based on time-domain superposition is developed, and its feasibility is verified by means of finite element simulation analysis and field pipeline positioning test. And the following research results are obtained. First, acoustic wave propagating in soil can be divided into P-wave and S-wave and undergoes reflection, transmission and waveform conversion at the contact between soil and the PE pipeline, and the elastic wave reflected back to the surface contains the location information of the buried pipeline, so the reflection echo signal can be used for the positioning of the buried PE pipeline. Second, the 6-channel detector signal obtained through simulation is treated by using the time-domain superposition method and the positioning area is imaged. Buried PE pipelines can be located more accurately based on the imaging map, whose brightest-colored geometric center represents the summit of the buried PE pipeline. Third, the positioning test is carried out on the PE pipelines with buried depths of 0.5 m, 1.0 m and 1.5 m, respectively, and the corresponding maximum positioning errors are 0.09 m, 0.243 m and 0.304 m, indicating that the deeper the pipeline, the larger the positioning error. In conclusion, the positioning accuracy by this method can meet the needs of field positioning of buried PE pipelines and the research results can provide guidance for the research and development of acoustic detecting and positioning device of buried PE pipelines. © 2022 Natural Gas Industry Journal Agency. All rights reserved.
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页码：111 / 121
页数：10
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