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Shack-Hartmann传感器用于湍流大气横向风速的测量 | |
其他题名 | Measurement of Path-Averaged Transverse Wind Speed with a Shack-Hartmann Wave-Front Sensor |
2009-01-01 | |
发表期刊 | 光学学报 |
ISSN | 0253-2239 |
摘要 | 分析了利用Shack—Hartmann波前传感器子孔径对之间光强信号的时间延迟交叉相关函数,进行光传播路径上横向平均风速测量的基本原理,给出了横向平均风速的计算公式,并进行了水平1km湍流大气实验测量。实验结果如下:不同子孔径对同时测量的横向风速相关系数达0.988;将多对子孔径对测量的结果取平均,与接收端附近布置的风速计测量的横向风进行了对比,发现两系统的测量结果在随时间的变化趋势上具有较好的一致性,两次实验拟合的相关系数分别为0.848和0.820,标准偏差分别为0.372和0.376。以上结果表明,将Shack—Hartmann波前传感器用于横向平均风速的测量是可行的,拓展了该传感器的使用功能。 |
其他摘要 | By measuring time lagged cross correlation function with a pair of sub-apertures of Shack-Hartmann wavefront sensor, the path-averaged transverse wind speed and wind direction can be found directly from the slope of this function with no time delay. Experiential formula to calculate the path-averaged wind speed is deduced. And the experiment on it in 1000 m horizontal propagating path was carried out for the first time by use of a Shack - Hartmann wave-front sensor. Some results were found. Firstly, the correlation coefficients of wind speed reach 0.988 from different pairs of sub-apertures; secondly, the results from different pairs of sub-apertures were averaged, and the variation trend was in accord with gained from an anemometer placed in the 15-m tower. The correlation coefficients of two typical experiments are 0. 848 and 0. 820 respectively. All the experimental results indicate that measuring path-averaged transverse wind speed by Shack-Hartmann wave-front sensor is feasible, which extends the function of this sensor. |
关键词 | 湍流大气 Shack Hartmann波前传感器 闪烁相关 路径横向平均风速 |
收录类别 | CSCD |
语种 | 中文 |
CSCD记录号 | CSCD:3584638 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.hfcas.ac.cn:8080/handle/334002/61486 |
专题 | 中国科学院合肥物质科学研究院 |
推荐引用方式 GB/T 7714 | . Shack-Hartmann传感器用于湍流大气横向风速的测量[J]. 光学学报,2009,029. |
APA | (2009).Shack-Hartmann传感器用于湍流大气横向风速的测量.光学学报,029. |
MLA | "Shack-Hartmann传感器用于湍流大气横向风速的测量".光学学报 029(2009). |
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