Research On System Of Video Encoding And Security Transmission For Mobile Robot

Mobile robots which are used for dangerous environment like military reconnaissance and bomb disposal usually complete the assigned tasks through remote control. Video monitoring takes an important position in the remote control of mobile robot just because of its rich content and visible information.In tradition, mobile robots use two independent channel to transmit video and data, but the video transmission module has high power and short transmission distance. Besides, the whole system does not have any security measures, so we have to use two encryption device to emprove the problem, which make the system more complicated, expensive and inflexible. Thus the traditional communication scheme for mobile robot is difficult to meet some special application requirements, such as the communication distance and data security requirements.This paper did exploratory research on system of remote video monitoring and security transmission for mobile robot. A new communication scheme for mobile robot based on digital video monitoring system was proposed according to special application needs. In this scheme, video and data were transmitted by WLAN, instead of traditional scheme which using two independent channel to transmit video and data.Firstly, a kind of real-time digital video monitoring system has be designed and realized, including video compression module selection, driver programming, application implementation for the video compression based on the Linux kernel, and GUI design for video playing. Besides, a streaming media server has been set up for video data transmission.Secondly, this paper presented the risk existed in the mobile robot system under WLAN, and proposed multi-layer security architecture based on OpenVPN, then applied it into remote monitoring system of the mobile robot.At the end of this paper, security and time delay of the video system were tested. The video system worked normally and time delay was acceptable. It could be used as a detector and navigator.Besides, attack test was also implemented, and the result proved that the security architecture worked well.The system has an open architecture,so it is easy to extend according to special application needs.The research in the paper has extensive application value.