阳光背景下小口径激光引信探测性能研究

为了研究阳光辐射对小口径激光引信探测性能的影响，结合大气阳光辐射传输理论和噪声产生机理，建立了光电探测器表面阳光辐射功率模型和系统信噪比模型；分析了激光探测装置和探测目标不同空间位置以及系统带宽对系统性能的影响；结果表明：探测目标与探测装置的空间位置对系统探测性能具有不同的影响：系统信噪比随着接收装置表面倾斜角θ增大而增强，当θ＜0．4 rad时，系统信噪比SNR＜5；当探测距离大于10 m时，信噪比基本为0，激光探测系统失效；目标表面倾斜角γ越小对系统的影响越大，当γ＝0．6 rad时，系统最大信噪比仅为12；选取合适的接收系统带宽对激光引信抗阳光干扰和信号接收有着重要的作用；该结果为提高系统探测性能提供了一定的依据。

Research on Detection Performance of Small Caliber Laser Fuze Under the Sunlight

In order to study the influence of the solar radiation on the detection performance of small caliber laser fuze,based on the theory of atmospheric radiation transmission and the mechanism of noise generation,the model of the solar radiation power and the system signal to noise ratio (SNR ) were established. The influence of different spatial position and system bandwidth on the system performance was analyzed. The results show that the spatial location of the target and the detecting device has different influence on the system performance:SNR is enhanced with the increase of the inclination angle of the receiving device,and when theθ<0. 4 rad,the SNR<5;and when the detection distance is greater than 10 m,the SNR is 0,and there is the failure of the laser detection system;The influence of target surface inclination angle on the system is larger,when theγ =0. 6 rad,and the maximum system SNR is only 12;It is important to select appropriate receiving system bandwidth for the anti sunlight interference and signal reception of laser fuze. The results provide a basis for improving the detection performance of the system.