一种投影式激光方向测量方法

为了在激光告警中实现全方位角度探测,且达到一定的探测精度,提出了一种投影式激光方向测量方法.通过计算激光照射在参量给定的遮光板上形成的投影量.求解在探测器上由不同探测象限产生的不同的探测电流的比值.再根据投影面积的比值与角度一一对应的关系可事先编码的原理.由对应程序判断激光入射方向.在软件Matlab仿真中计箅得到产生最小分辨率的四个极限角度分别为(0°,90°)、(33°,21°)、(33°,69°)、(45°,90°),并由实验得到最小分辨电压为0.05 V.通过仿真计算与实验数据证明该设计可达到最小识别角度1°的探测要求.

A Method of Projection Measurement for Laser Direction

In order to achieve all-round angle detection in laser warning with a certain accuracy, we proposed a method of measuring laser direction using geometrical projection. By calculating the shading area when laser projects on the board with given parameters, we got the current ratio from the different quadrants of the measurement, and the direction of the incident laser can be judged by the corresponding relation between projection area ratio and angle using the program for angle detection. For a minimum resolution of angle detection, the limit angles are calculated as (0°,90°), (33°, 21°), (33°,69°), (45°,90°) in Matlab, and the minimum voltage 0.05 V in experiment. The simulation calculation and the experimental data show that the design can achieve the detection requirements of the minimum identification of 1°.