夜视成像技术在长江航道视频监视中的应用

为了保障长江航道的安全畅通，结合长江航道上已建设的视频监视系统，对远距离红外夜视技术在航道视频监视中的作用、应用环境、技术需求以及实用效果进行了分析。长江航道夜视监控处于野外工作状态，受自然环境的影响大。同时，在航道应用中，人们对航标标位、灯光、船舶以及航标结构损坏情况都有不同的监控要求。基于监控需求和对已建系统实际使用效果的考量，提出了航道视频监视系统中的红外夜视设备的配置要求。该系统由激光照明系统、信号采集系统、控制系统和信号传输系统等四部分组成。给出了各个部分的具体参数。随着内河航道的逐步现代化，夜视系统在航道视频监视中的应用范围必将逐渐扩大，在航道维护管理中也将发挥重要作用。

Estimation of Phosphorus Content in Apple Tree Canopy Based on Hyperspectrum

To keep the waterway of Yangtz River safe and smooth, the role, application environment, technical requirements and actual effectiveness of the long distance infrared night vision technology in the video surveillance of the waterway of Yangtz River are analyzed accordig to the video surveillance systems in use. Because the video surveillance systems for Yangtz River waterway are used in the field, they are affected greatly by the natural environment. Meanwhile, in the application of the waterway, people has different surveillance requirements on the navigation mark position, light and ships. In view of the actual surveillance needs and use effectiveness, the configuration requirements of an infrared night vision device for the waterway video surveillance system are proposed. The system is comprised of four subsystems: a laser light, a signal collection system, a control system and a signal transfer system. The detailed parameters of each subsystem are given. With the modernization of the river waterway, the application area of the night vision system in waterway surveillance will be enlarged and the night vision system will play an important role in the maintenance and management of waterways in the future.