{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T01:34:51Z","timestamp":1760232891119,"version":"build-2065373602"},"reference-count":30,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2022,12,2]],"date-time":"2022-12-02T00:00:00Z","timestamp":1669939200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003032","name":"(Agence National de la Recherche Technique)","doi-asserted-by":"publisher","award":["CNRS"],"award-info":[{"award-number":["CNRS"]}],"id":[{"id":"10.13039\/501100003032","id-type":"DOI","asserted-by":"publisher"}]},{"name":"RICE (Research and Innovation Center of Energy), GRTgaz","award":["CNRS"],"award-info":[{"award-number":["CNRS"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Localization of buried polyethylene pipes is an important issue for network managers. This study focuses on an acoustic method, which consists of vibrating the pipe and observing the signal with a receiver placed on the ground surface. This method provides an estimate of the path of the pipe but gives no information on the depth. We developed a multi-sensor method based on the principle of vibrating the pipe, which allows estimating the depth while being non-invasive and non-destructive and without a priori information on the propagation medium. These sensors are positioned perpendicular to the pipe. We developed a new estimator to estimate the depth and the propagation velocity in the medium, which is an important variable in our problem. This estimator is based on the MUSIC algorithm and is adapted to our choice of modeling. In this paper, two models of travel times in typical situations are presented. The first one represents the case where all sensors can be placed inside the trench (on the ground surface) in which the pipe is buried. The second one represents the case where sensors are placed inside and outside the trench. These travel time models aim to provide a fast result to allow the method to be used by field agents. They are compared with a full wavefield modeling by finite differences.<\/jats:p>","DOI":"10.3390\/s22239433","type":"journal-article","created":{"date-parts":[[2022,12,5]],"date-time":"2022-12-05T08:10:57Z","timestamp":1670227857000},"page":"9433","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Three-Dimensional Localization of Buried Polyethylene Pipes Using Acoustic Method"],"prefix":"10.3390","volume":"22","author":[{"given":"William","family":"Xerri","sequence":"first","affiliation":[{"name":"CNRS-UMR7330 CEREGE, AMU, CdF, IRD, INRAE, OSU-Pytheas, Europole de l\u2019Arbois, BP 80, 13545 Aix-en-Provence, CEDEX 4, France"},{"name":"MADE-SA, 167 Impasse de la Garrigue, 83210 La Farl\u00e8de, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3101-7556","authenticated-orcid":false,"given":"Gineth","family":"Saracco","sequence":"additional","affiliation":[{"name":"CNRS-UMR7330 CEREGE, AMU, CdF, IRD, INRAE, OSU-Pytheas, Europole de l\u2019Arbois, BP 80, 13545 Aix-en-Provence, CEDEX 4, France"}]},{"given":"Alessandra","family":"Ribodetti","sequence":"additional","affiliation":[{"name":"IRD-UR082 CNRS-UMR7329 GEOAZUR, Campus Azur Universit\u00e9 et Observatoire de la C\u00f4te d\u2019Azur, 250 rue Albert Einstein CS 10269, 06905 Sophia Antipolis, France"}]},{"given":"Laurent","family":"Zomero","sequence":"additional","affiliation":[{"name":"MADE-SA, 167 Impasse de la Garrigue, 83210 La Farl\u00e8de, France"}]},{"given":"Philippe","family":"Picon","sequence":"additional","affiliation":[{"name":"MADE-SA, 167 Impasse de la Garrigue, 83210 La Farl\u00e8de, France"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Liu, Y., Habibi, D., Chai, D., Wang, X., Chen, H., Gao, Y., and Li, S. 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