摘要
为了提高激光近炸引信的定距精度,减小脉冲激光回波幅度变化引起的时刻判别误差和起止信号时间间隔测量产生的误差,设计了有源CR双阈过零时刻判别方法和基于FPGA内部专用进位链构成的延迟线插入法的时间间隔测量方法,将其应用于脉冲激光引信系统,进行了测距实验研究,给出了实验数据和测量误差分析,最终得到0.17 m的定距精度。实验结果表明,在不增加脉冲激光近炸引信系统功耗、体积和重量的前提下,该方法有效地提高了系统定距的精度,满足实际需要。
To improve the ranging precision of pulse laser proximity fuze and reduce the timing error caused by the amplitude of the echo and the error caused by time-interval measurement, an active CR double threshold zero-crossing timing discriminating method and a time-interval measurement method based on the FPGA delay-line interpolator formed by carry-in chain were designed. Applied in the system of pulse laser proximity fuze, the distance results were given and the error was analyzed in theory. Finally, the precision of 0.17 m level was achieved. The experimental results shew that the precision of the system was improved and the methods met the practical needs, on the condition of not increasing the power consumption, volume and weight of pulse laser proximity fuze.
出处
《电光与控制》
北大核心
2012年第12期93-96,共4页
Electronics Optics & Control
