CAJ | 학술논문

设计了一种适合激光近炸引信的小体积新型高精度时刻鉴别电路,采用偏置开关补偿技术来抵消因电荷积累造成的过零点漂移，即依据激光回波幅度来决定偏置电压大小。分析了改进的恒比定时方法的时刻鉴别误差，并进行了详细测试，实验结果表明：信噪比大于20时，输入信号为0.2～2.134 V，既在20.12 dB动态范围内，由输入信号幅度变化和噪声变化引起的时刻鉴别误差小于125 ps，信噪比大于60时，误差小于100 ps。最后将该时刻鉴别电路应用于整机系统中进行实际检测，激光重复频率20 kHz条件下，20 m的作用距离范围内单次定距标准偏差为1.45 cm，极大提高了激光近炸引信的定距精度。
설계료일충괄합격광근작인신적소체적신형고정도시각감별전로,채용편치개관보상기술래저소인전하적루조성적과영점표이，즉의거격광회파폭도래결정편치전압대소。분석료개진적항비정시방법적시각감별오차，병진행료상세측시，실험결과표명：신조비대우20시，수입신호위0.2～2.134 V，기재20.12 dB동태범위내，유수입신호폭도변화화조성변화인기적시각감별오차소우125 ps，신조비대우60시，오차소우100 ps。최후장해시각감별전로응용우정궤계통중진행실제검측，격광중복빈솔20 kHz조건하，20 m적작용거리범위내단차정거표준편차위1.45 cm，겁대제고료격광근작인신적정거정도。
A newly compact high-precision timing discrimination circuit based on constant fraction discrimination was designed, which was adapted extraordinarily to laser proximity fuze. A biased switch compensation technology was adopted to counteract the crossing zero walk error caused by charge accumulative action, which meant that the biased voltage was decided by the laser echo amplitude. The timing discrimination error of the improved constant fraction discrimination was analyzed with lots of detailed experiments, The experiment results indicated that the timing discrimination error caused by the amplitude variation and the noise variation of the received signal was less than 125 ps, when the SNR was more than 20 and the input signal is 0.2 V to 2.134 V (20.12 dB dynamic range). The error was less than 100 ps when the SNR more than 60. Furthermore, Detection on the whole system integrating the timing discrimination circuit verifies that, the laser repetition frequency can reach 20 kHz, the single shot standard deviation is about 1.45 cm over 20 m ranges, which improve greatly the fixed distance precision of laser proximity fuze.