光学学报, 2016, 36 (10): 1028001, 网络出版: 2016-10-12   

新型LED光源气溶胶探测雷达系统优化设计与初步实验

Optimal Design and Preliminary Experiments on New Type of LED Light Source Radar System for Aerosol Detection
作者单位
西安理工大学机械与精密仪器工程学院, 陕西 西安 710048
摘要
为了实现近地面、多波长气溶胶时空探测,克服激光波长可选择性不足的问题,利用LED丰富的光谱特性,设计了一种新型发光二极管(LED)光源雷达。LED能量小且发散角大,其出光能量、发散角、接收视场角和几何重叠因子都会对LED光源雷达探测距离产生影响。针对共轴LED光源雷达系统的特点,分析了几何重叠因子的特征和计算方法,详细讨论了光源发散角和接收视场角对几何重叠因子的影响。结合LED光源的特点,利用美国标准大气模型对雷达系统的探测能力进行了仿真,优化了光源发散角和接收视场角,在LED能量一定的情况下获得了最大的探测距离。搭建了LED光源雷达系统并完成了初步实验观测,结果表明该雷达夜晚能够接收到240 m远处的大气回波,验证了雷达探测低层大气气溶胶的能力。
Abstract
In order to achieve near-ground and multi-wavelength space-time detection of aerosol and overcome the problem of lack of selectable laser wavelength, a new type of light-emitting diode (LED) light source radar is designed using the abundant spectral characteristics of LED. The energy of LED is low, and the divergence angle is large. The output energy, divergence angle, receiver′s field angle and geometric overlap factor will affect the detection range of LED light source radar. In this paper, aiming at the characteristics of the coaxial LED light source radar system, the features and calculation methods of the geometric overlap factor are analyzed, and the influences of light source divergence angle and receiver′s field angle on the geometric overlap factor are discussed in detail. Combined with the characteristics of the LED light source, the detection capability of the radar system is simulated by US standard atmospheric model, and the light source divergence angle and receiver′s field angle are optimized. The maximum detection range is got at the certain LED energy. The LED light source radar system is built and preliminary experimental observation is completed. The experimental results show that the designed radar can receive the atmospheric echo signal at the distance of 240 m at night. It verifies the radar′s ability to detect low-level atmospheric aerosol.

钟文婷, 华灯鑫, 刘君, 张宸, 晏克俊. 新型LED光源气溶胶探测雷达系统优化设计与初步实验[J]. 光学学报, 2016, 36(10): 1028001. Zhong Wenting, Hua Dengxin, Liu Jun, Zhang Chen, Yan Kejun. Optimal Design and Preliminary Experiments on New Type of LED Light Source Radar System for Aerosol Detection[J]. Acta Optica Sinica, 2016, 36(10): 1028001.

本文已被 1 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!