采用罗盘和平面镜对风向南北线定位的作用

Function of locating the north and the south wind direction meridian line by using compass and plane mirror

测风仪器安装时风向感应器的定向准确与否,直接影响该站点风向资料的"三性"。目前台站常用军用罗盘(指北针),进行风向感应器的定向,若操作者不太熟练,容易产生方位误差。本文介绍一种利用罗盘结合平面镜成像原理的方法——"平面镜投影法",该方法操作简便、快捷、准确,也便于磁偏角修正的操作。

When installing the wind instrument, whether orientation of wind direction sensor is accurate or not will directly influence the ＂three features＂ of wind direction of the station. For the orientation of wind direction sensor,the military compass is usually used in the station at present. If the operator is not familiar with it, they may easily cause the passion error. This paper introduced a formation principle by using compass and plane mirror image ＂plane mirror projection＂, which is of simple,quick and accurate operation. It is easy for magnetic declination revision.