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应用于测风激光雷达的多普勒校准仪
Design of Verifying Attachment for Calibration of Wind Lidar
查看参考文献8篇
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文摘
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测风激光雷达作为一种测速工具，系统的多普勒校准是验证测量准确性的关键步骤之一。针对车载、机载测风激光雷达的校准要求，设计了便携式多普勒校准仪。统测得的目标运动速度比较，得到系统的速度校准曲线。其基本原理是：利用已知目标的运动速度，与激光雷达系研制的多普勒校准仪自身系统相对误差为1％，小于激光雷达测量误差；其多普勒散射信号频谱展宽小于0．7MHz，可以等效为气溶胶的后向散射谱。径向速度的连续调节范围可达±50m／s。实验结果显示：当探测光子数接近2000时，激光雷达测速的精度为0．6m／s。 |
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其他语种文摘
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Using dual Fabry-Perot （F-P） interferometer as frequency discriminator, direct-detection Doppler lidar has been becoming a prominent and popular meteorological technique to measure atmospheric winds. To be a measurement tool, calibration of the system is a key procedure. A portable verifying attachment is designed for the convenient calibration of lidar systems mounted on mobile vehicles. The basic principle is to make a comparison between velocity measured by lidar system and the preset velocity of the revolving disk. The designed relative error of the verifying attachment is 1%, the dynamic range of velocity is greater than ±50 m/s, the maximum spectral broadening corresponds to the designed target has a width of 0.7 MHz, which is approximate to the aerosol circumstance. Lidar experimental results show that an accuracy of 0.6 m/s can be obtained for 2000 detected photons. |
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来源
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中国激光
,2006,33(10):1412-1416 【核心库】
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关键词
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测量
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激光雷达
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测风激光雷达
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多普勒校准
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地址
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1.
苏州大学物理科学与技术学院, 江苏, 苏州, 215006
2.
中国科学院安徽光学精密机械研究所, 安徽, 合肥, 230031
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0258-7025 |
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学科
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电子技术、通信技术 |
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基金
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中国科学院知识创新工程项目
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中国科学院“百人计划”项目
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文献收藏号
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CSCD:2554490
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8
共1页
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