气溶胶粒子微观特性对后向散射回波的影响
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摘要
提出了一种从微观角度分析气溶胶粒子微观特性对后向散射回波影响的方法。基于Mie散射理论,建立了蒙特卡罗仿真模型,对收发同轴激光雷达的气溶胶后向散射回波特性进行仿真分析,得到了气溶胶粒径、复折射率实部及虚部对后向散射回波的峰值强度、信号延迟、波形展宽的影响规律,分析了由气溶胶粒子微观特性引起的多种宏观特性的同时作用对后向散射回波产生的影响。结果表明:后向散射回波强度主要取决于散射系数和不对称因子,回波延迟和脉宽与散射系数相关;随着复折射率实部的增大,后向散射回波强度增加,回波延迟和脉宽先减小后增大,但影响较小;随着复折射率虚部的增大,后向散射回波强度先减小后增大,虚部对回波延迟和脉宽无明显影响。
A method is proposed to analyze the influence of the aerosol particles on the backscattering echo from a microscopic point of view. Based on the Mie scattering theory, a Monte Carlo simulation model is established to simulate and analyze the aerosol backscattering echo by the transmitting and receiving coaxial lidar. The influence law of the aerosol particle size, real part and imaginary part of the complex refractive index on the peak intensity, signal delay and waveform broadening of backscattering echoes is obtained. The effect of the simultaneous action of multiple macroscopic properties caused by the microscopic properties on the backscattering echoes is analyzed as well. The results show that the backscattering signal intensity mainly depends on the scattering coefficient and the asymmetry factor. The echo delay and pulse width are related to the scattering coefficient. As the real part of the complex refractive index increases, the backscattering echo intensity increases, while the echo delay and pulse width decrease first and then increase, but the influence is relatively small. With the increase of the imaginary part of the complex refractive index, the backscattering echo intensity decreases first and then increases, but the imaginary part has no obvious influence on echo delay and pulse width.
A method is proposed to analyze the influence of the aerosol particles on the backscattering echo from a microscopic point of view. Based on the Mie scattering theory, a Monte Carlo simulation model is established to simulate and analyze the aerosol backscattering echo by the transmitting and receiving coaxial lidar. The influence law of the aerosol particle size, real part and imaginary part of the complex refractive index on the peak intensity, signal delay and waveform broadening of backscattering echoes is obtained. The effect of the simultaneous action of multiple macroscopic properties caused by the microscopic properties on the backscattering echoes is analyzed as well. The results show that the backscattering signal intensity mainly depends on the scattering coefficient and the asymmetry factor. The echo delay and pulse width are related to the scattering coefficient. As the real part of the complex refractive index increases, the backscattering echo intensity increases, while the echo delay and pulse width decrease first and then increase, but the influence is relatively small. With the increase of the imaginary part of the complex refractive index, the backscattering echo intensity decreases first and then increases, but the imaginary part has no obvious influence on echo delay and pulse width.
引文
[1] Pfennigbauer M,Wolf C,Weinkopf J,et al.Online waveform processing for demanding target situations[J].Proceedings of SPIE,2014,9080:90800J.
[2] Arora V K.Proximity fuzes:theory and techniques[M].New Delhi:Defence Research and Development Organisation,Ministry of Defence,2010.
[3] Cowell J.Fuzing validation[EB/OL].(2012-11-30)[2018-11-03].https://www.aerosociety.com/Assets/Docs/Events/710/9)%20Fuzing%20Validation%20RAeS%20Conference%20Nov%202012.pdf.
[4] Grabner M,Kvicera V.The wavelength dependent model of extinction in fog and haze for free space optical communication[J].Optics Express,2011,19(4):3379-3386.
[5] Wang F J,Chen H M,Ma C,et al.Research on the characteristics of fog backscattering laser echo[J].Infrared and Laser Engineering,2018,47(5):94-98.王凤杰,陈慧敏,马超,等.云雾后向散射激光回波特性研究[J].红外与激光工程,2018,47(5):94-98.
[6] Kou T,Wang H Y,Wang F,et al.Study on back-scattering light intensity in airborne laser range-gated imaging[J].Chinese Journal of Lasers,2015,42(1):0113003.寇添,王海晏,王芳,等.机载激光距离选通成像大气后向散射光强研究[J].中国激光,2015,42(1):0113003.
[7] Kou T,Wang H Y,Wang F,et al.Research on pulse echo characteristic of airborne laser detecting air target[J].Acta Optica Sinica,2015,35(4):0414001.寇添,王海晏,王芳,等.机载激光探测空中目标脉冲回波特性研究[J].光学学报,2015,35(4):0414001.
[8] Zhang J G,Liang X G,Liu J X,et al.Effect of pulse width on cloud-and-fog backscattering signal[J].Acta Photonica Sinica,2012,41(12):1422-1426.张京国,梁晓庚,刘建新,等.脉冲宽度对云雾回波的影响研究[J].光子学报,2012,41(12):1422-1426.
[9] Zhang J G,Liu J X,Niu Q P,et al.Characters of cloud and fog backscattering of laser[J].Journal of Detection & Control,2012,34(5):1-4,15.张京国,刘建新,牛青坡,等.近距云雾散射激光回波特征[J].探测与控制学报,2012,34(5):1-4,15.
[10] Zhang J G,Gao C,Liu J X,et al.Monte Carlo simulation and experimental study on cloud-and-fog backscattering signals[J].High Power Laser and Particle Beams,2012,24(12):2920-2924.张京国,高宠,刘建新,等.近距云雾回波蒙特卡罗模拟与实验测量[J].强激光与粒子束,2012,24(12):2920-2924.
[11] Bohren C F,Huffman D R.Absorption and scattering of light by small particles[M].Weinheim:Wiley-VCH Verlag GmbH & Co.KGaA,1998.
[12] M?tzler C.MATLAB functions for Mie scattering and absorption[R].Bern:Institut für Angewandte Physik,2002:1-18.
[13] Guo J.Study on the transmission characteristics of pulse laser for near-field fixed-distance in the rain[D].Nanjing:Nanjing University of Science & Technology,2012.郭婧.近场定距脉冲激光在降雨中的大气传输特性研究[D].南京:南京理工大学,2012.
[14] Zhang Y L,Wang Y M,Huang A P.Influence of suspended particles based on Mie theory on underwater laser transmission[J].Chinese Journal of Lasers,2018,45(5):0505002.张莹珞,王英民,黄爱萍.米氏理论下悬浮粒子对水下激光传输的影响[J].中国激光,2018,45(5):0505002.
[15] Yang Y F,Qin J H,Li T,et al.Calculation for the number concentration of dust aerosol particles and characteristics of laser transmission[J].Infrared and Laser Engineering,2017,46(S1):S106006.杨玉峰,秦建华,李挺,等.沙尘气溶胶粒子数量浓度计算及激光传输特性[J].红外与激光工程,2017,46(S1):S106006.
[16] Yin H.Atmospheric radiology foundation[M].Beijing:China Meteorological Press,1993.尹宏.大气辐射学基础[M].北京:气象出版社,1993.
[17] Sun Q Y,Xu J,Gao Y,et al.Transmission characteristics of visible light in different types of aerosols[J].Laser & Optoelectronics Progress,2018,55(11):110103.孙琦云,徐军,高旸,等.可见光在不同类型气溶胶中的传输特性[J].激光与光电子学进展,2018,55(11):110103.
[18] Shi G Y.Atmospheric radiology[M].Beijing:Science Press,2007:71-73.石广玉.大气辐射学[M].北京:科学出版社,2007:71-73.
[19] Dong X,Hu Y H,Xu S L,et al.Echoing characteristics of coherent lidar in different aerosol environments[J].Acta Optica Sinica,2018,38(1):0101001.董骁,胡以华,徐世龙,等.不同气溶胶环境中相干激光雷达回波特性[J].光学学报,2018,38(1):0101001.
[2] Arora V K.Proximity fuzes:theory and techniques[M].New Delhi:Defence Research and Development Organisation,Ministry of Defence,2010.
[3] Cowell J.Fuzing validation[EB/OL].(2012-11-30)[2018-11-03].https://www.aerosociety.com/Assets/Docs/Events/710/9)%20Fuzing%20Validation%20RAeS%20Conference%20Nov%202012.pdf.
[4] Grabner M,Kvicera V.The wavelength dependent model of extinction in fog and haze for free space optical communication[J].Optics Express,2011,19(4):3379-3386.
[5] Wang F J,Chen H M,Ma C,et al.Research on the characteristics of fog backscattering laser echo[J].Infrared and Laser Engineering,2018,47(5):94-98.王凤杰,陈慧敏,马超,等.云雾后向散射激光回波特性研究[J].红外与激光工程,2018,47(5):94-98.
[6] Kou T,Wang H Y,Wang F,et al.Study on back-scattering light intensity in airborne laser range-gated imaging[J].Chinese Journal of Lasers,2015,42(1):0113003.寇添,王海晏,王芳,等.机载激光距离选通成像大气后向散射光强研究[J].中国激光,2015,42(1):0113003.
[7] Kou T,Wang H Y,Wang F,et al.Research on pulse echo characteristic of airborne laser detecting air target[J].Acta Optica Sinica,2015,35(4):0414001.寇添,王海晏,王芳,等.机载激光探测空中目标脉冲回波特性研究[J].光学学报,2015,35(4):0414001.
[8] Zhang J G,Liang X G,Liu J X,et al.Effect of pulse width on cloud-and-fog backscattering signal[J].Acta Photonica Sinica,2012,41(12):1422-1426.张京国,梁晓庚,刘建新,等.脉冲宽度对云雾回波的影响研究[J].光子学报,2012,41(12):1422-1426.
[9] Zhang J G,Liu J X,Niu Q P,et al.Characters of cloud and fog backscattering of laser[J].Journal of Detection & Control,2012,34(5):1-4,15.张京国,刘建新,牛青坡,等.近距云雾散射激光回波特征[J].探测与控制学报,2012,34(5):1-4,15.
[10] Zhang J G,Gao C,Liu J X,et al.Monte Carlo simulation and experimental study on cloud-and-fog backscattering signals[J].High Power Laser and Particle Beams,2012,24(12):2920-2924.张京国,高宠,刘建新,等.近距云雾回波蒙特卡罗模拟与实验测量[J].强激光与粒子束,2012,24(12):2920-2924.
[11] Bohren C F,Huffman D R.Absorption and scattering of light by small particles[M].Weinheim:Wiley-VCH Verlag GmbH & Co.KGaA,1998.
[12] M?tzler C.MATLAB functions for Mie scattering and absorption[R].Bern:Institut für Angewandte Physik,2002:1-18.
[13] Guo J.Study on the transmission characteristics of pulse laser for near-field fixed-distance in the rain[D].Nanjing:Nanjing University of Science & Technology,2012.郭婧.近场定距脉冲激光在降雨中的大气传输特性研究[D].南京:南京理工大学,2012.
[14] Zhang Y L,Wang Y M,Huang A P.Influence of suspended particles based on Mie theory on underwater laser transmission[J].Chinese Journal of Lasers,2018,45(5):0505002.张莹珞,王英民,黄爱萍.米氏理论下悬浮粒子对水下激光传输的影响[J].中国激光,2018,45(5):0505002.
[15] Yang Y F,Qin J H,Li T,et al.Calculation for the number concentration of dust aerosol particles and characteristics of laser transmission[J].Infrared and Laser Engineering,2017,46(S1):S106006.杨玉峰,秦建华,李挺,等.沙尘气溶胶粒子数量浓度计算及激光传输特性[J].红外与激光工程,2017,46(S1):S106006.
[16] Yin H.Atmospheric radiology foundation[M].Beijing:China Meteorological Press,1993.尹宏.大气辐射学基础[M].北京:气象出版社,1993.
[17] Sun Q Y,Xu J,Gao Y,et al.Transmission characteristics of visible light in different types of aerosols[J].Laser & Optoelectronics Progress,2018,55(11):110103.孙琦云,徐军,高旸,等.可见光在不同类型气溶胶中的传输特性[J].激光与光电子学进展,2018,55(11):110103.
[18] Shi G Y.Atmospheric radiology[M].Beijing:Science Press,2007:71-73.石广玉.大气辐射学[M].北京:科学出版社,2007:71-73.
[19] Dong X,Hu Y H,Xu S L,et al.Echoing characteristics of coherent lidar in different aerosol environments[J].Acta Optica Sinica,2018,38(1):0101001.董骁,胡以华,徐世龙,等.不同气溶胶环境中相干激光雷达回波特性[J].光学学报,2018,38(1):0101001.
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