平流层飞艇多路视频切换器设计

Design of Multichannel Video Switcher for Stratosphere Airship

中文关键词:  CAN总线  视频切换  验收滤波  平流层飞艇

英文关键词:CAN  video switcher  acceptance filter  stratospheric airship

中文摘要:

      针对平流层飞艇实验阶段的视频监控需求，设计了一种灵活的视频切换器。采用NXP公司的LPC2292/01型基于ARM7内核的处理器，集成了CAN总线控制器，接口电路简单可靠；使用其强大的硬件验收滤波功能，可以滤除不需要的报文信息，软件可靠性高；通过CAN总线传输切换指令，可以实时切换地面操作者关心的视频画面，解决了视频监控需求较多与遥测通信带宽不足的矛盾。经地面测试和飞行试验验证，该系统完全满足平流层飞艇飞行试验的使用需求。

英文摘要:

      According to the video monitoring requirements of stratospheric airship on the experiment stage,a kind of flexible video switcher is designed,which uses NXP’s LPC2292/01 processor based on ARM7 core,and integrates the CAN controller.The interface circuit is simple and reliable.By using its powerful hardware acceptance filtering function,the useless message can be filtered out,and software has high reliability.The switching instructions are transmitted through CAN,and the concerned video screen is seen by the ground operators in real time.The contradiction of more video monitoring demands and insufficient bandwidth of remote communication is solved.The ground tests and flight tests show that this system completely meets the requirements of stratosphere airship flight.