Research on System of Video Encoding and Security Transmission for Mobile Robot
|School||Beijing University of Posts and Telecommunications|
|Course||Detection Technology and Automation|
|Keywords||Digital video surveillance MPEG-4 PCI bus driver Streaming OpenVPN|
Mobile robot, especially operating robots in hazardous environments, generally through the remote control to complete the assigned tasks with its intuitive and richness of feedback information, and video surveillance in the mobile robot remote control occupies an important position. Existing mobile robot general diagram transmission module and several transmission module transmission of video and control and status data from two separate channels, respectively, due to the low-frequency radio waves as a transmission medium, the signals are vulnerable to interference, and Illustrated module power consumption transmission distance is shorter, the entire system does not have any data security measures, To encrypt, encryption devices, you need two dedicated to making the system complicated, expensive and inflexible, and difficult to apply existing mobile robot communication mode special requirements of the communication distance and data security applications. In these special application requirements, the exploratory research of mobile robot remote video monitoring and security transmission system, mobile robot communication mode based digital surveillance, wireless LAN transmission of images and data information, instead of the traditional mobile robot Illustrated digital transmission module-based communication mode. First designed and implemented a real-time high mobile robot digital video surveillance systems, including video capture and compression module selection, based on the Linux kernel driver and application development, streaming media server build and video player interface design; followed by analyzing the security risks exist in the mobile robot system based on wireless LAN, targeted to design an OpenVPN-based multi-layer security structure, and the structure of the introduction of the remote monitoring system of the mobile robot. Finally, real-time video system and security testing. The test results show that the video system is working properly, the image is clear and stable latency (about 300 ms), and played a good supporting role in detection and navigation; system possible attack test results prove that the design the security architecture of security requirements. The entire system has an open structure, easy to be extended depending on demand, and thus the research content of this paper has important practical value.