随田坛形势的发展,投掷水平的不断提高,投掷赛场理该有一种新的突破,为寻求一种新的场地策划方法,笔者作了一些粗浅的探讨,介绍如下:一、“投掷赛场一点圆心激光描测法”的基本原理它是运用固定在经纬仪上的激光管,依据已用仪器测定的角度线和中线,按计算好的读数角再换算为仪器测角,加上激光管的俯角,激光管随经纬仪的偏转、定位而准直地射出一束红光在角度线、中线上寻找其相应距离的被测交点,然后连接相应的三个交点成为一条圆 With the development of the situation in the altar, the throwing level continues to improve, there is a new breakthrough in throwing the stadium. In order to seek a new venue planning method, the author made some superficial discussions as follows: It is the use of laser tube fixed on theodolite, according to the angle of the instrument has been measured and the center line, according to the calculation of the reading angle and then converted into the instrument angle, coupled with the depression angle of the laser tube , Laser tube with the theodolite deflection, positioning and collimation to emit a beam of red light in the angle line, the middle line to find the corresponding distance of the measured intersection, and then connect the corresponding three intersection point into a circle