一种抑制脉冲激光测距机低温虚警的方法

摘要

In practical application,the laser rangefinder often works well at normal temperature but its false alarm rate may not meet the requirement at low temperature. Aiming at solving the problem, the cause resulting in high false a-larm rate is discussed,circuits of noise detecting and threshold adjusting are designed. A monolithic microller is used in the feedback control loop. By adjusting the parameters of the control loop, the false alarm rate at temperature is depressed and it satisfies the requirement in practical application.%阐述了一种实用型抑制脉冲激光测距机低温虚警的方法,重点用于解决脉冲激光测距机在研制过程中,常温和高温都能够满足虚警率指标,而低温时虚警率工作超标的问题.通过产生虚警的原因分析,在雪崩二极管噪声闭环偏置控制回路中,增加了门限控制及噪声检测电路,通过单片机对闭环噪声控制回路的参数进行实时调节,使低温虚警得到有效抑制,能够满足系统指标要求.