Ship wake detection based on laser Doppler effect

ZHU Dong-hua; ZHANG Xiao-hui

In order to improve the guidance method for torpedoes,based on laser Doppler effect,a theoretical model is established for detecting the ship wake with laser.A differential optical system is designed to produce Doppler shift frequency in scattering signal on sensor,which can improve the signal-to-noise ratio efficiently.The simulation results indicate that the Doppler shift signal can be detected by lock-in amplifier technique,and the noise will be limited.The technique has a broad applicative perspective in under-water weaponry.

Corresponding author: ZHANG Xiao-hui, zhangxiaohui505@vip.sina.com

1. Department of Weaponry Engineering, Naval University of Engineering, Wuhan 430033, China

Received Date: 2005-04-13

Accepted Date: 2005-11-16

Available Online: 2006-05-25

Abstract: In order to improve the guidance method for torpedoes,based on laser Doppler effect,a theoretical model is established for detecting the ship wake with laser.A differential optical system is designed to produce Doppler shift frequency in scattering signal on sensor,which can improve the signal-to-noise ratio efficiently.The simulation results indicate that the Doppler shift signal can be detected by lock-in amplifier technique,and the noise will be limited.The technique has a broad applicative perspective in under-water weaponry.

HTML

Reference (10)

[1]	ZHANG X Y,HONG X,HE Sh Zh.Study on measurement technique of scattering-surface displacement utilizing laser Doppler effect[J].Chinese Journal of Lasers,2000,27(8):751～755(in Chinese).
[2]	DRAIN L E.The laser Doppler technique[M].New York:John Wiley & Sons,1980.36～45.
[3]	HE Sh Zh,YAO X,JIANG Ch Zh.Study on demodulation system of laser Doppler[J].Laser Technology,2004,28(2):190～192(in Chinese).
[4]	ZHANG X H,GE W L,ZHU D H.Study of torpedo wake-homing based on laser scattering[A].Paper volumes of academical conference 2004 of Optics Academy of China[C].Hangzhou:Zhejiang University,2004.273～277(in Chinese).
[5]	JI B J,ZHOU D Sh,ZHANG J Sh.Guiding torpedoes based on laser effect of shipwakes[J].Journal of Torpedo Technology,2000,31(3):40～43(in Chinese).
[6]	ZHANG T L,LIU Zh Sh.A database of the optical properties used for radiative transfer calculations in ocean and atmosphere[J].Periodical of Ocean University of China,2004,34(4):641～648(in Chinese).
[7]	PEGAU W S.A comparison of methods for the measurement of the absorption coefficient in natural waters[J].Journal of Geophysical Resource,1995,100(7):13201～13220.
[8]	CHENG G X.Theory and application of Raman-Brillouin scattering[M].Beijing:Science Press,2001.54～58(in Chinese).
[9]	ZHU X,WANG H,QI L J.Frequency analyzing of backscattering signals in airborne laser bathymetry[J].Laser & Infrared,2003,33(1):25～27(in Chinese).
[10]	OLEG V K,OLGA V P.Assessment of sea water optical characteristics in the upper 200m ocean by their subsurface values[J].SPIE,1994,2258:623～633.

Ship wake detection based on laser Doppler effect

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views