-
水下尾流激光雷达在近场就已开始与水体发生了激光的多次散射, 很容易导致接收系统因动态范围不够而饱和, 其反向恢复时间一般长达102 ns级, 影响远场信号接收.本文针对此问题分析了激光水体后向光散射强度衰减规律, 自主研发了一种能量对消式水下激光雷达前端接收系统. 该系统通过在近场强信号尖峰上叠加一个高速反向瞬态对消电流抑制接收系统饱和, 之后将两信号融合, 还原真实回波信号波形.分析了技术难点并给出了解决方案, 讨论了瞬态对消电流的生成时刻对强度的影响规律.经实测与分析, 该系统对消电流脉宽为5 ns, 幅度控制步进为122 nA, 幅度调节范围为135360 A, 成功实现了对近场强散射的抑制. 该系统完全可以满足尾流激光雷达大动态探测的需要.The multiple scattering of underwater lidar for wake happens in the near field, which leads ordinary receiving system to be saturated due to lack of dynamic range. The receiving system recovery time is usually up to several nanoseconds, which affects the receiving of the far-field signal. For this problem, the attenuation law of laser back-scattering intensity by water is analyzed and a front-end receiver of underwater lidar with energy consumption is developed. A high-speed reverse transient cancellation current is superimposed on the strong peak of near-field part signal to prevent the receiving system from being saturated, thereby restoring the two signals to integrated returned signal waveform. The technical difficulties are analyzed and the solutions are presented. The influence of generation time of transient cancellation current on intensity is discussed. The results of measurement and analysis prove that the transient cancellation current is 5 ns in pulse width, its adjustable step of 122 nA and the adjustable range is 135360 upA. The system suppresses the near-field strong scattering signal successfully and can meet the requirement for the underwater large dynamic range lidar for wake.
-
Keywords:
- lidar /
- bubble /
- energy consumption /
- dynamic range
[1] Stanic S, Caruthers J W, Goodman R R, Kennedy E, Brown R A 2009 IEEE J. Oceanic Eng. 34 83
[2] Ulloa O, Sathyendranath S, Platt T 1994 Appl. Opt. 33 7070
[3] Zhang X D, Lewis M, Johnson B 1998 Appl. Opt. 37 6525
[4] Carrica P M 1999 Int. J. Multiphase Flow 25 257
[5] Trevorrow M V, Vagle S, Farmer D M 1994 J. Acoust. Soc. Am. 95 1922
[6] Qiu H H 2003 J. Opt. Soc. Am. A 20 690
[7] Kokhanovsky A A 2003 J. Opt. A: Pure Appl. Opt. 5 47
[8] Zhang J S 2001 Ph. D. Dissertation (Xi'an: Xi'an Institute of Optics and Fine Mechanics of Chinese Academy) (in Chinese) [张建生 2001 博士学位论文 (西安: 中国科学院西安光学精密机械研究所)]
[9] Shi S W, Wang J A, Jiang X Z, Ma Z G, Yu Y 2008 Acta Opt. Sin. 28 1861 (in Chinese) [石晟玮, 王江安, 蒋兴舟, 马治国, 余扬 2008 光学学报 28 1861]
[10] Gu J N, Zhang Z H, Zhang X H 2007 Acta Phot. Sin. 36 1504 (in Chinese) [顾建农, 张志宏, 张晓晖 2007 光子学报 36 1504]
[11] Cariou J, Jeune B L, Lotrian J, Guern Y 1990 Appl. Opt. 29 1689
[12] Yang K C, Zhu X, Li Z G 2001 Chin. J. Lasers 28 74 (in Chinese) [杨克成, 朱晓, 李再光 2001 中国激光 28 74]
[13] Zhu X, Yang K C, Li Z G 1999 Laser Technol. 23 209 (in Chinese) [朱晓, 杨克成, 李再光 1999 激光技术 23 209]
[14] Chen W G, Huang T X, Lu Y M, Xiong Z F 1995 Journal of Huazhong University of Science and Technology 23 52 (in Chinese) [陈文革, 黄铁侠, 卢益民, 熊兆飞 1995 华中理工大学学报 23 52]
[15] Jiu M Y H 1995 Fundamentals and Application of PMT (Binbei: Institute of Digital Publishing and Printing of Bin Song) p82
[16] Reynolds R A, Stramski D, Wright V M, Wozniak S B 2010 J. G. R. 115 8024
[17] Johnson H, Graham M 1993 High-Speed Digital Design: A Handbook of Black Magic (USA: Prentice Hall PTR) p295
[18] Wang J D, Wu Z H, Zhang B, Wei Z J, Liao C J, Liu S H 2008 Acta Phys. Sin. 57 5620 (in Chinese) [王金东, 吴祖恒, 张兵, 魏正军, 廖常俊, 刘颂豪 2008 57 5620]
[19] Cheng N, Huang G F, Wang J D, Wei Z J, Guo J P, Liao C J, Liu S H 2010 Acta Phys. Sin. 59 5338 (in Chinese) [程楠, 黄刚锋, 王金东, 魏正军, 郭健平, 廖常俊, 刘颂豪 2010 59 5338]
[20] Sun Z B, Ma H Q, Lei M, Yang H D, Wu L A, Zhai G J, Feng J 2007 Acta Phys. Sin. 56 5790 (in Chinese) [孙志斌, 马海强, 雷鸣, 杨捍东, 吴令安, 翟光杰, 冯稷 2007 56 5790]
[21] Toumazou C, Lidgey F J, Haigh D 1993 Analogue IC Design: the Current-Mode Approach (London: Peter Peregrinus Ltd.) p93
[22] Zhao Y S, Zhou Y Q, Wang P 2001 Current Mode Circuit (Tianjin: Tianjin University Press) p25 (in Chinese) [赵玉山, 周跃庆, 王萍 2001 电流模式电子电路 (天津: 天津大学出版社) 第25页]
-
[1] Stanic S, Caruthers J W, Goodman R R, Kennedy E, Brown R A 2009 IEEE J. Oceanic Eng. 34 83
[2] Ulloa O, Sathyendranath S, Platt T 1994 Appl. Opt. 33 7070
[3] Zhang X D, Lewis M, Johnson B 1998 Appl. Opt. 37 6525
[4] Carrica P M 1999 Int. J. Multiphase Flow 25 257
[5] Trevorrow M V, Vagle S, Farmer D M 1994 J. Acoust. Soc. Am. 95 1922
[6] Qiu H H 2003 J. Opt. Soc. Am. A 20 690
[7] Kokhanovsky A A 2003 J. Opt. A: Pure Appl. Opt. 5 47
[8] Zhang J S 2001 Ph. D. Dissertation (Xi'an: Xi'an Institute of Optics and Fine Mechanics of Chinese Academy) (in Chinese) [张建生 2001 博士学位论文 (西安: 中国科学院西安光学精密机械研究所)]
[9] Shi S W, Wang J A, Jiang X Z, Ma Z G, Yu Y 2008 Acta Opt. Sin. 28 1861 (in Chinese) [石晟玮, 王江安, 蒋兴舟, 马治国, 余扬 2008 光学学报 28 1861]
[10] Gu J N, Zhang Z H, Zhang X H 2007 Acta Phot. Sin. 36 1504 (in Chinese) [顾建农, 张志宏, 张晓晖 2007 光子学报 36 1504]
[11] Cariou J, Jeune B L, Lotrian J, Guern Y 1990 Appl. Opt. 29 1689
[12] Yang K C, Zhu X, Li Z G 2001 Chin. J. Lasers 28 74 (in Chinese) [杨克成, 朱晓, 李再光 2001 中国激光 28 74]
[13] Zhu X, Yang K C, Li Z G 1999 Laser Technol. 23 209 (in Chinese) [朱晓, 杨克成, 李再光 1999 激光技术 23 209]
[14] Chen W G, Huang T X, Lu Y M, Xiong Z F 1995 Journal of Huazhong University of Science and Technology 23 52 (in Chinese) [陈文革, 黄铁侠, 卢益民, 熊兆飞 1995 华中理工大学学报 23 52]
[15] Jiu M Y H 1995 Fundamentals and Application of PMT (Binbei: Institute of Digital Publishing and Printing of Bin Song) p82
[16] Reynolds R A, Stramski D, Wright V M, Wozniak S B 2010 J. G. R. 115 8024
[17] Johnson H, Graham M 1993 High-Speed Digital Design: A Handbook of Black Magic (USA: Prentice Hall PTR) p295
[18] Wang J D, Wu Z H, Zhang B, Wei Z J, Liao C J, Liu S H 2008 Acta Phys. Sin. 57 5620 (in Chinese) [王金东, 吴祖恒, 张兵, 魏正军, 廖常俊, 刘颂豪 2008 57 5620]
[19] Cheng N, Huang G F, Wang J D, Wei Z J, Guo J P, Liao C J, Liu S H 2010 Acta Phys. Sin. 59 5338 (in Chinese) [程楠, 黄刚锋, 王金东, 魏正军, 郭健平, 廖常俊, 刘颂豪 2010 59 5338]
[20] Sun Z B, Ma H Q, Lei M, Yang H D, Wu L A, Zhai G J, Feng J 2007 Acta Phys. Sin. 56 5790 (in Chinese) [孙志斌, 马海强, 雷鸣, 杨捍东, 吴令安, 翟光杰, 冯稷 2007 56 5790]
[21] Toumazou C, Lidgey F J, Haigh D 1993 Analogue IC Design: the Current-Mode Approach (London: Peter Peregrinus Ltd.) p93
[22] Zhao Y S, Zhou Y Q, Wang P 2001 Current Mode Circuit (Tianjin: Tianjin University Press) p25 (in Chinese) [赵玉山, 周跃庆, 王萍 2001 电流模式电子电路 (天津: 天津大学出版社) 第25页]
计量
- 文章访问数: 7283
- PDF下载量: 720
- 被引次数: 0
下载:
