激光测距机最大测程评估方法研究

Study on Evaluating Maximum Range of Laser Range Finder

最大测程是评估激光测距机测距性能的综合性指标,在实际应用过程中需要定期检验。目前采用的实际测距法受限于天气和目标条件难以实施,消光比法则因为难以实时设置或测量激光接收处理电路的增益也不易操作。而目前检验激光发射能量、光束发散角、光轴偏差角、最小可探测激光功率等关键参数的手段已经相当普及,可以恰当地应用这些检验结果来评估激光测距机的最大测程是否满足要求;如果能精确给出具体型号激光测距机激光能量分布的表达式,就可以给出精确评估最大测程的理论计算公式,从而通过测量激光测距机的关键参数来判定最大测程是否满足要求。

Maximum range must be periodically inspected,because it is a combination property for evaluating ranging performance of laser range finder. At the present time, measuring the range of actual target at the maximum range is restricted by conditions of weather and target, light extinction method also hard to operate because it needs to set or measure the real-time gain of laser receiving and processing circuit. At the meantime, there are enough methods to measure key parameters of laser range finder such as laser emitting energy, laser beam diffuse angle, deviation angle of optical axis, minimum detectable laser power, etc. So we can use these measuring results to evaluate whether the maximum range of laser range finder reaches desired impact. If we acquire accurate representation about laser energy distribution of specific-type laser range finders, theoretical formula for accurately evaluating maximum range can be given, then whether the maximum range reaches desired impact can be decided by measuring key parameters of laser range finder.