论文部分内容阅读
脉冲激光测距机为了抑制近距离大气后向散射的干扰,采用时间程序增益(TPG)控制电路,使测距机接收系统的增益随目标距离即回波时间变化。相对增益就是不同距离上的增益与最大增益的比值,其对运动小目标测距的影响十分明显,合理控制增益曲线是测距机设计中需要考虑的重要因素。相对增益曲线测量是由光电转换、距离设置、模拟回波激光器和准确标定的连续可调衰减片等部件构成的模拟测距回路实现的。在设置的每个目标距离上,调整衰减片使测距机达到临界测距状态,再用与回波距离对应的衰减值序列计算并拟合出相对增益曲线。对多台测距机的实际测试结果表明,该方法是在整机状态下用接近实际测距的方式测量相对增益曲线的科学可行的方法。
Pulse laser range finder In order to restrain the atmospheric backscattering interference in the near distance, the time program gain (TPG) control circuit is used to make the gain of the range finder receiving system change with the target distance, ie echo time. Relative gain is the ratio of the gain to the maximum gain at different distances, which has a significant impact on the small target range of motion. Reasonable control of the gain curve is an important factor that needs to be considered in the design of the range finder. The relative gain curve measurement is realized by the photoelectric ranging, distance setting, analog echo laser and the accurately calibrated continuously adjustable attenuator and other components. At each target distance set, the attenuation plate is adjusted so that the range finder reaches the critical distance measuring condition, and then the relative gain curve is calculated and calculated using the attenuation value sequence corresponding to the echo distance. The actual test results of multiple range finders show that this method is a scientific and feasible method of measuring the relative gain curve in the whole machine state with the approach of actual distance measurement.