Shack-Hartmann传感器用于湍流大气横向风速的测量

HFCAS OpenIR

	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	被引频次：4[CSCD] [CSCD记录]
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).