基于时域叠加的声学埋地PE管道定位新方法  

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

作　　者：葛亮[1] 王甜 肖小汀 吴佳晔 Mark Robinson 卓勇 杨国强 GE Liang;WANG Tian;XIAO Xiaoting;WU Jiaye;Mark Robinson;ZHUO Yong;YANG Guoqiang(School of Mechanical and Electronic Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China;School of Electrical Engineering and Information,Southwest Petroleum University,Chengdu,Sichuan 610500,China;School of Engineering,Newcastle University,Newcastle NE17RU,UK;Gas Branch,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610031,China)

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]西南石油大学电气信息学院 [3]纽卡斯尔大学工程学院 [4]中国石油西南油气田公司燃气分公司

出　　处：《天然气工业》2022年第9期111-121,共11页Natural Gas Industry

基　　金：国家自然科学基金项目“井下双向流量电磁检测机理及其溢流预警模型研究”(编号:51974273);成都市国际科技合作资助项目“埋地PE管声学探测定位技术研究”(编号:2020-GH02-00016-HZ);国家山区公路工程技术研究中心开放基金项目“基于弹性波反射法的浅层介质动力学模型及成像算法研究”(编号:GSGZJ-2020-01)。

摘　　要：聚乙烯(PE)管道凭借耐腐蚀、使用年限长等优点在城镇中、低压埋地燃气管网建设中被广泛应用,但由于管道信息系统不完善,且已有的埋地PE管道定位技术还不成熟,导致管道位置不明确,易造成施工建设中对管道的损伤和破坏。为此,基于弹性波反射原理,建立了弹性波在土壤—PE管道介质中的传播理论模型,提出了基于时域叠加的埋地PE管道定位新方法,并通过有限元仿真分析和现场管道定位测试验证了该定位方法的可行性。研究结果表明:(1)土壤中传播的声波可分为纵波和横波,其在土壤—PE管道分界面将发生反射、透射以及波形转换,其中反射回地面的弹性波含有地下管道位置信息,因此可利用反射回波信号来定位埋地PE管道;(2)使用时域叠加法对仿真得到的6路检波器信号进行处理并对定位区域成像,由成像图可较准确地定位出埋地PE管道,图中颜色最亮的单元几何中心点表示的是埋地PE管道的顶点;(3)分别进行了埋深为0.5 m、1.0 m、1.5 m的PE管道定位测试,最大定位误差依次为0.090 m、0.243 m、0.304 m,即管道埋深越大,定位误差越大。结论认为,该方法计算得到的定位精度可以满足现场定位埋地PE管道的需要,研究成果可用于指导声学埋地PE管道探测定位装备的研发。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 timedomain 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 o

关 键 词：时域叠加 声学探测 PE管道定位 弹性波波形转换 有限元分析 成像定位 现场PE管道定位测试 

分 类 号：TU990.3[建筑科学—市政工程]