CAJ | 학술논문

对基于盖革模式APD（GM-APD）探测器的激光雷达的探测性能和虚警抑制方法进行了研究。从系统原理与探测时序出发，研究了长死时间、回波脉宽大于时间数字转换器（TDC）分辨时间情况下目标探测概率与虚警率分布，分析了回波强度、脉宽、噪声与回波位置对目标探测概率与虚警率的影响；利用双探测器结构的探测模型，研究了双探测器结构在提高系统探测性能中的作用。研究结果表明：回波越强，脉宽越窄，噪声越低，回波位置越靠前，目标探测概率越高，虚警率越低，系统探测性能越好；对于双探测器结构，与逻辑可很好地抑制虚警；或逻辑可提高目标探测概率；使用与逻辑和或逻辑相结合的双探测器结构，可以获得更高的目标探测概率和更低的虚警率。
대기우개혁모식APD（GM-APD）탐측기적격광뢰체적탐측성능화허경억제방법진행료연구。종계통원리여탐측시서출발，연구료장사시간、회파맥관대우시간수자전환기（TDC）분변시간정황하목표탐측개솔여허경솔분포，분석료회파강도、맥관、조성여회파위치대목표탐측개솔여허경솔적영향；이용쌍탐측기결구적탐측모형，연구료쌍탐측기결구재제고계통탐측성능중적작용。연구결과표명：회파월강，맥관월착，조성월저，회파위치월고전，목표탐측개솔월고，허경솔월저，계통탐측성능월호；대우쌍탐측기결구，여라집가흔호지억제허경；혹라집가제고목표탐측개솔；사용여라집화혹라집상결합적쌍탐측기결구，가이획득경고적목표탐측개솔화경저적허경솔。
The detection performance and false alarm suppression of laser radar with Geiger-mode avalanche photodi-ode(GM-APD)is investigated.Based on the system working principle and detection time sequence,under the condi-tion that long dead-time and the echo pulse width are larger than the resolving time of the time-to-digital converter(TDC),the theoretical model of the target detection probability and false alarm is established,and the influence of theecho intensity,echo pulse width,noise and echo position on the detection performance is analyzed.According to thedetection model of the dual detector structure,the effects of dual detector structure on improving the system detectionperformance are studied.The results show that,as echo intensity is stronger,echo pulse width is narrower,noise is low-er,and echo position is further front,detection performance is better.Using dual detector structure,the false alarm canbe well suppressed with AND gate,the target detection probability can be improved with OR gate,and higher targetdetection probability and lower false alarm can be achieved with AND gate and OR gate.