@inproceedings{fdi:010086586,
  title = {{E}stimating the depth of a buried polyethylene pipe by comparing propagation models},
  author = {{X}erri, {W}. and {S}aracco, {G}. and {R}ibodetti, {A}lessandra and {Z}omero, {L}. and {P}icon, {P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n civil engineering, one of the crucial problems is the location of buried polyethylene pipes. {F}or this type of material, electromagnetic waves are less suitable than acoustic waves (e.g. the necessity to introduce a metal cable into the pipeline making the method invasive, difficulty in differentiating between a gas pipe and a water pipe). {B}y injecting an acoustic signature into the pipe it possible to estimate the passage of the plumb of the pipe, by considering the pipe as a secondary vibrating source. {O}ur work aims to estimate the depth of these pipes by acoustic method and in a non-destructive way. {F}or this we have developed a system to take real data measurements. {F}rom antenna processing methods ({MUSIC} algorithm called 'high resolution') that we have adapted to our problematic, we obtain an estimate of the parameters of interest. {P}romising results have been obtained on real data from a semi-controlled test area by considering a weakly heterogeneous semi-infinite medium with an average velocity. {O}ne of the main problems is that we have, a priori, no knowledge of the propagation medium. {I}t can change drastically from one place of application to another. {T}he challenge is the modeling of acoustic propagation, on a meter scale, in heterogeneous soil with vertical (trench). {W}e present here different propagation simulations applied to our problem. {A} first modeling is to consider two slightly heterogeneous media, vertically stratified, each with an average speed of propagation, considering the ray theory (time modeling). {T}he second will be based on finite difference propagation of the complete wave field ({O}perto et al., {G}eophysics, 2009) including the trench. {T}he goal is to compare the two models on the scale of our problem and to study the accuracy of the depth estimate that we can reach ({C}ramer {R}ao bound).},
  keywords = {},
  numero = {},
  pages = {7  multigr.},
  booktitle = {},
  year = {2022},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086586},
}