| 相干多普勒测风激光雷达校准方法研究 |
| Research on the calibration methods for coherent Doppler wind lidar |
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| 中文摘要: |
| 针对相干多普勒测风激光雷达需要校准的参数多、涉及计量专业多、校准方法不全的问题，充分考虑激光测风非接触、高时空分辨、大探测量程的特性，采用“特征分析?多手段融合”的方法体系，突破了风速、风向、最大测量距离、探测盲区等争议性参数的量化评价难点。分析定标转盘、射频信号模拟多普勒频移、标准风速仪3种不同风速校准方法的优缺点和适用条件，并对定标转盘风速校准法进行改进，提升风速参数校准的数据可靠性。针对风向校准难题，辩证性地给出了不同扫描模式下的校准方法，提升校准普适性。基于具体测量案例给出了风速、风向的校准结果，并对风速、风向参数进行不确定度分析，有效地说明了校准方法的可行性。研究成果为气象观测、航空安全、新能源等领域的风场精准探测提供了标准化技术支撑，对于推动大气遥感计量技术发展具有积极意义。 |
| 英文摘要: |
| In light of the challenges posed by the requirement of numerous parameters calibration, the involvement of multiple metrology specialties, and the inadequacies in existing calibration methods for coherent Doppler wind lidar. Considering the characteristics of laser wind measurement, such as non?contact, high spatiotemporal resolution and large detection range, the method of "feature analysis and multi?method integration" is adopted to break through the difficulties of quantitative evaluation of controversial parameters such as wind speed, wind direction, maximum measurement distance and detection blind zone. The advantages, disadvantages and applicable conditions of three different wind speed calibration methods, namely the wind speed calibrations using a calibration turntable, the radio frequency signal simulation of Doppler frequency shift and using a standard anemometer, are analyzed. Moreover, the calibration turntable wind speed calibration method was improved to enhance the data reliability of the wind speed parameter calibration. Aiming at the difficult problem of wind direction calibration, the calibration method under different scanning modes is presented dialectically to improve its universality. Based on specific measurement cases, the calibration results of wind speed and wind direction are given, and the uncertainty analysis of wind speed and wind direction parameters are performed, effectively illustrating the feasibility of the calibration method. The research results provide standardized technical support for the precise detection of wind fields in such fields as meteorological observation, aviation safety, and new energy, and have positive significance for promoting the development of atmospheric remote sensing metrology technology. |
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| 中文关键词: 相干多普勒探测 测风激光雷达 特征分析 多手段融合 校准方法 不确定度分析 |
| 英文关键词:coherent Doppler detection wind lidar feature analysis multi⁃method fusion calibration method uncertainty analysis |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2025.03.11 |
| 引用本文：陈朝勇, 魏瑗瑗, 邢帅, 佟梓慷, 武腾飞.相干多普勒测风激光雷达校准方法研究[J].计测技术,2025,45(3):123~132. |
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