摘要
针对脉冲激光探测系统中存在的回波幅度变化大,阈值比较电路受脉冲前沿时差影响导致距离判别精度低的问题,提出基于脉冲信号峰值电压反馈的自动增益控制方法,利用峰值电压采样,反馈控制电压形成,压控增益调整来实现信号增益的可控。通过仿真和实验验证:证明该方法能够解决宽动态范围下脉冲信号增益自动控制问题,从而减小脉冲前沿检测时差,提高系统距离判别精度。
The laser pulse detection system has the problems of big change of echo amplitude and the low ranging precision which is caused by the influence of TDOA of the pulse leading end to threshold comparing circuit.A gain auto-control method based on the pulse peak voltage feedback was proposed.The signal gain was controlled through the peak voltage sampling,feedback control voltage forming and voltage control adjusting.Simulation and experiments results indicated that this method could realize the pulse signal gain auto-control under a wide dynamic range,reduce the TDOA of the pulse leading end,and improve the ranging precision.
出处
《探测与控制学报》
CSCD
北大核心
2011年第1期6-8,13,共4页
Journal of Detection & Control
