摘要
激光主动成像系统是以激光为光源,对远、小、暗或者恶劣天气条件下的目标进行照明,利用CCD摄相机接收目标的回波信号最终成像,从而实现对目标的跟踪、探测和识别。为了克服主动成像系统的大气后向散射,提高成像质量,利用单片机和CPLD设计了距离选通同步控制板。利用同步控制板可产生精度为1 ns的选通控制脉冲,实现了激光器与摄相机的同步控制,以时间的先后分开不同距离上的后向散射和目标反射回的有用信号。仿真和实验结果证明:该控制板能确保目标的回波信号刚好在摄相机选通工作的时间内到达摄像机并成像。
Laser is utilized as illuminating source in laser active imaging system. The detected object which is remote, small, dark or in bad weather conditions is illuminated by laser, echo signal is received and photos are taken by CCD camera. Finally, target track, detection and identification are realized. In order to cancel back scattering of atmospheric particulate and improve the image quality, synchronization control range gating plate was designed based on sigle chip computer and CPLD. Synchronization control plate can genarate strobe pulse of 1 ns precision to realize synchronization control between laser and camera. Synchronization control plate can compart different range background light and reflected signal by target according to time sequencing. The simulation and experiment results prove that the control plate insure the laser pulse signal reflected by the target can fall on working time of gated camera and be imaged.
出处
《红外与激光工程》
EI
CSCD
北大核心
2012年第10期2685-2688,共4页
Infrared and Laser Engineering
基金
吉林省科技厅项目(201105054)
