Luo Hanjun, Ouyang Zhengbiao, Liu Qiang, Lu Zhenli, Li Bin
Appl Opt. 2017 Oct 10;56(29):8216-8223. doi: 10.1364/AO.56.008216.
There exists a performance limitation in a pulsed Geiger-mode avalanche photodiode laser ranging system because of the echo intensity random fluctuation caused by turbulence effects. To suppress the influence of turbulence effects, we present a cumulative pulse detection technique with the ability to achieve improved cumulative probabilities and range accuracy. Based on the modulated Poisson model, the cumulative probabilities, range accuracy, and their influencing factors are investigated for a cumulative Q-switched laser pulse train. The results show that the improved cumulative probabilities and range accuracy can be obtained by utilizing cumulative pulse detection, with the condition that the echo intensity is 10, the echo pulse width is 10 ns, and the turbulence degree is 3, the target detection probability increases by 0.4, the false alarm probability decreases by 0.08, and the accuracy and precision increase by 46 cm and 27 cm, respectively.
由于湍流效应引起的回波强度随机波动，脉冲盖革模式雪崩光电二极管激光测距系统存在性能限制。为了抑制湍流效应的影响，我们提出了一种累积脉冲检测技术，该技术能够提高累积概率和测距精度。基于调制泊松模型，研究了累积调Q激光脉冲序列的累积概率、测距精度及其影响因素。结果表明，利用累积脉冲检测可以提高累积概率和测距精度，在回波强度为10、回波脉冲宽度为10 ns、湍流度为3的条件下，目标检测概率提高0.4，虚警概率降低0.08，精度和精密度分别提高46 cm和27 cm。
