光学学报, 2020, 40 (6): 0628001, 网络出版: 2020-03-06   

提高相位调制多普勒激光雷达频移测量范围的方法 下载: 908次

An Improved Method for Frequency-Shift Measurement Dynamic Range Based on Phase-Modulated Doppler Lidar
作者单位
1 哈尔滨师范大学计算机科学与信息工程学院, 黑龙江 哈尔滨 150052
2 哈尔滨工业大学可调谐激光技术国家级重点实验室, 黑龙江 哈尔滨 150080
3 黑龙江工程学院理学院, 黑龙江 哈尔滨 150050
摘要
相位调制多普勒激光雷达可以兼顾直接探测多普勒激光雷达和相干探测多普勒激光雷达两者的优势。但由于其存在自身频移测量动态范围不足的问题,在实际的应用中受限。为了解决这一问题,提出了一种“星迹图”方法,这种方法是将相位调制鉴频参量进行正交分解,利用他们在二维或三维坐标系中变化的性质来进行信号光频移测量,并对其测量灵敏度和误差进行理论建模。该方法既有效保持了原有方法的优势,又大幅度提高了频移测量的动态范围。理论研究证明,该方法可以将测量动态范围提高约9倍。并在实验上,通过对目标的测量证明了该方法的正确性和有效性。
Abstract
Phase-modulated Doppler lidar could benefit from both direct detection Doppler lidar and coherent detection Doppler lidar. However, owing to the lack of dynamic range of its own frequency-shift measurement, its practical application is limited. In this paper, a star map method to measure the signal optical frequency shift was proposed, which used the changing of phase-modulation discriminate parameters in the two- or three-dimensional coordinate system. Furthermore, the models of its measurement sensitivity and error were derived. The proposed method could not only effectively maintain the advantages of the conventional method but also greatly improve the dynamic range of the frequency-shift measurement.Theoretical research showed that the method could increase the measurement dynamic range by approximately nine times. The correctness and effectiveness of the proposed method were experimetnally proven by measuring actual targets.

杜军, 程娅, 张晓晓, 杨娜, 曲彦臣. 提高相位调制多普勒激光雷达频移测量范围的方法[J]. 光学学报, 2020, 40(6): 0628001. Jun Du, Ya Cheng, Xiaoxiao Zhang, Na Yang, Yanchen Qu. An Improved Method for Frequency-Shift Measurement Dynamic Range Based on Phase-Modulated Doppler Lidar[J]. Acta Optica Sinica, 2020, 40(6): 0628001.

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