在激光雷达海洋探测技术中,为了实时监测海水中悬浮颗粒物粒径分布,需要对激光雷达接收信号进行处理和反演计算。根据Mie散射理论,用聚苯乙烯粒子作为研究样本,取三种不同粒径的聚苯乙烯粒子,分别配制不同浓度的溶液、测量了不同散射角、不同光波长下的散射系数随浓度的变化关系。测量结果表明:在散射角为15°,光波长范围为450 nm~700 nm时,散射系数与浓度具有很好的单调递增性;对1∶1∶1 的三种粒径聚苯乙烯溶液进行了测量,结果说明混合物散射系数与同种浓度下三种单粒径的散射系数之和基本一致,具有很强的线性相关性;通过实验与理论比较,在适合波段内,反演误差小,反演精度较高。

In the lidar ocean detection technology, in order to monitor the particle size distribution of suspended particles in seawater, processing and inversion calculating are required for the received signal of lidar. According to the Mie scattering theory, poly-styrene particles were used as research samples. Three kinds of polystyrene particles with different sizes were prepared as the different concentration of the solution separately. The relationship between the scattering coefficient and the concentration was measured under different scattering angles and wavelength. The measurement results show that the scattering coefficient and concentration are very monotonous increasing when the scattering angle is 15 degrees and the optical wavelength is in 450 nm ~ 700 nm.Three particle size polystyrene solutions with a concentration ratio of 1∶1∶1 were measured. The results show that the scattering coefficient of the mixture is basically the same as that of the three single particle scattering coefficients under the same concentration,and has a strong linear correlation. Compared with the experiment and theory, the inversion error is small and the precision of the inversion is high in the suitable band.

TN958. 98

公益性(气象)行业专项(GYHY201206037)、江苏省科技支撑计划(BE2010733)