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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仿真中计算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。
In order to achieve full-angle detection in laser warning and achieve certain detection accuracy, a projection laser direction measurement method is proposed. By calculating the amount of projection of the laser beam on a given mask, the ratio of the different detection currents generated by the different detection quadrants on the detector can be calculated. In a one-to-one correspondence with the angle according to the projection area ratio, The principle of coding, the corresponding program to determine the direction of laser incidence. The four limit angles (0 °, 90 °), (33 °, 21 °), (33 °, 69 °), (45 °, 90 °) The minimum resolution of the experiment was 0.05 V. The simulation calculation and experimental data prove that the design can reach the minimum detection angle of 1 ° detection requirements.