摘要
传统激光测距中最常用的方法是采用工作在线性模式的单元APD进行光子探测,而随着探测距离增加,线性增益不满足使用需求,盖革模式APD应运而生。阵列探测盖革模式APD是具有探测单光子能级信号能力的新型探测器件,具有1×10^(6)至1×10^(7)的内增益,响应度高,但其受背景光影响较大,因此这一器件的信号处理难度极大。本文提出基于光子计数法的阵列信号处理的三种思路,均能够大幅提升信号对比度。其中多通道累加算法简单便捷、可实现性高;空间卷积池化算法具有高信号散布灵敏性;阵列拓展算法具备高信号辨识度。
The most common used method in traditional laser ranging is photon detection by a unit APD working in linear mode.As the detection distance increases,the linear gain does not meet the needs,and the Geiger mode APD comes into being.Array detection Geiger mode APD is a new type of detection device with the ability to detect single-photon energy level signals.With an internal gain of 1×10^(6) to 1×10^(7),it has a high response degree,but it is greatly affected by the background light,so the signal processing of this device is extremely difficult.In this paper,three methods of array signal processing based on the photon counting method are proposed,all of which can greatly improve the signal contrast.Among them,the multi-channel accumulation algorithm is convenient and highly implementable;the spatial convolutional pooling algorithm has high signal dispersion sensitivity;and the array expansion algorithm has high signal recognition.
作者
王皓民
白一波
耿林
韩隆
WANG Hao-min;BAI Yi-bo;GENG Lin;HAN Long(North China Research Institute of Electro-Optics,Beijing 100015,China)
出处
《激光与红外》
CAS
CSCD
北大核心
2022年第4期537-542,共6页
Laser & Infrared
关键词
激光测距
阵列信号处理
光子计数
盖格模式
laser ranging
array signal processing
photon counting
Geiger mode
