An underwater ranging system based on photoacoustic effect occurring on target surface

Research output: Chapters, Conference Papers, Creative and Literary WorksRGC 32 - Refereed conference paper (with host publication)peer-review

1 Scopus Citations
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Author(s)

  • Kai Ni
  • Kai Hu
  • Xinghui Li
  • Qian Zhou
  • Xiaohao Wang

Detail(s)

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Volume10023
ISBN (print)9781510604650
Publication statusPublished - Nov 2016
Externally publishedYes

Publication series

Name
Volume10023
ISSN (Print)0277-786X
ISSN (electronic)1996-756X

Conference

TitleConference on Optical Metrology and Inspection for Industrial Applications IV
PlaceChina
CityBeijing
Period12 - 14 October 2016

Abstract

In this paper, an underwater ranging system based on photoacoustic effect occurring on target surface is proposed. In this proposal, laser pulse generated by blue-green laser is directly incident on target surface, where the photoacoustic effect occurs and a sound source is formed. And then the sound wave which is also called photoacoustic signal is received by the ultrasonic receiver after passing through water. According to the time delay between transmitting laser and receiving photoacoustic signal, and sound velocity in water, the distance between the target and the ultrasonic receiver can be calculated. Differing from underwater range finding by only laser, this approach can avoid backscattering of laser beam, so easier to implement. Experimental system according to this principle has been constructed to verify the feasibility of this technology. The experimental results showed that a ranging accuracy of 1 mm can be effectively achieved when the target is close to the ultrasonic receiver.

Research Area(s)

  • Photoacoustic effect, Time of flight, Underwater ranging

Citation Format(s)

An underwater ranging system based on photoacoustic effect occurring on target surface. / Ni, Kai; Hu, Kai; Li, Xinghui et al.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 10023 SPIE, 2016. 100231A.

Research output: Chapters, Conference Papers, Creative and Literary WorksRGC 32 - Refereed conference paper (with host publication)peer-review