運用被動時間反轉法及聲線法建立水中聲源二維及三維定位之方法

Translated title of the contribution: 2-D AND 3-D LOCALIZATION OF UNDERWATER SOUND SOURCE BY USING PASSIVE TIME REVERSAL MIRROR AND RAY METHOD

K. W. Liu, C. J. Huang, G. P. Too, Z. Y. Shen, S. H. Wang, Y. D. Sun

Research output: Contribution to journalArticlepeer-review

Abstract

This study proposes techniques for the 2-D and 3-D localizations of underwater sound source based on passive time reversal method (TRM) and acoustic ray method. For the 2-D localization, a vertical array with four hydrophones was used to collect the sound signals emitted from a sound source. The ray-tracing code BELLHOP was then used to determine the acoustic pressure field generated by the time-reversed signals received by the hydrophones. Based on the retrofocus characteristic of the TRM, the location with the maximum pressure is the location of the sound source. The localization based on the BELLHOP code is limited to the 2-D position of the source, namely the distance and depth, without the bearing. Laboratory experiments performed in a towing tank and field tests conducted in the offshore region off Yanpu Harbor, Pingtung, revealed that the estimated source location is close to the actual one. For the 3-D localization, a cross-shaped hydrophone array consisting of a vertical array and a horizontal array was used to collect sound signals. Because the 3-D ray equations in the (x, y) plane of the Cartesian coordinates have the same form as the 2-D ray equation in the (r,z) plane of the cylindrical polar coordinates, after the 2-D position (roe, zoe) of the source has been determined from the signals collected by the vertical hydrophones, the BELLHOP code was used to determine the pressure field in the (x, y) plane from the signals collected by the horizontal hydrophones, and the position with maximum pressure is set as the location of the source, (xoe, yoe) . Thus, the 3-D location of the source (xoe, yoe, zoe) was obtained. Experiments conducted in a towing tank revealed that the estimated 3-D source location was close to the actual 3-D source location.

Translated title of the contribution2-D AND 3-D LOCALIZATION OF UNDERWATER SOUND SOURCE BY USING PASSIVE TIME REVERSAL MIRROR AND RAY METHOD
Original languageChinese (Traditional)
Pages (from-to)153-169
Number of pages17
JournalJournal of Taiwan Society of Naval Architects and Marine Engineers
Volume40
Issue number3
Publication statusPublished - 2021

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Mechanical Engineering

Fingerprint

Dive into the research topics of '2-D AND 3-D LOCALIZATION OF UNDERWATER SOUND SOURCE BY USING PASSIVE TIME REVERSAL MIRROR AND RAY METHOD'. Together they form a unique fingerprint.

Cite this