激光测距森林罗盘仪的研究

笔者将激光技术应用于森林勘测,研制出具有可见光导向、激光测距和坡面直读水平距三项主要功能的新型测量工具。本仪由发射系统和接收系统两部分组成。发射系统发射出红色激光束,在森林环境中设置出既定方位的可见方向线,作业人员可按照红色光斑的指示砍伐测线。激光束通过半楔形透镜,分为具有一定夹角的两束光,在接收杆上直接读取实际距离值。在坡面上测量时,若接收杆垂直于水平面,读数为斜距。若接收杆垂直于坡面,读数则为水平距。利用遮光罩或定角器可以保证接收杆垂直于坡面,发明了在坡面上测距不经斜距换算而直接获得水平距的新技术。

A STUDY ON COMPASS BY LASER MEASURING DISTANCE IN FOREST

A new survey toll withthree functions such as visible light for direction finding, laser for distance finding and horizontal distance reading on slope was developed by application of laser technique. This instrument is composed of projecting system and receiving system The red laser beams projected from the projecting system set up a visible line in dcterminal direction in the forest surroundings. Operators can fell trees along the direction given by the illuminating zones. The laser beam is separated by a semi-wedgy lens into two beams with fixed angle, so the actual distance can be directly read out at the receiving pole. Surveyed distance on slope, if the receiving pole is vertical to the level, the scale reading is the value of the inclined distance, and if the receiving pole is vertical to the slope plane, the scale reading is the value of the horizontal distance. The receiving pole vertical to the slope plane is ensured by using a lens hood or an orientation device which is installed on one side of the receiving pole. So a new technique has becn invented which, the borizontal distance can be obtained from the receiving pole without the conversion of inclined distance, when surveyed distance on slope.