UAV Video And Remote Measurement Data Synchronized Record And Replay System

Rencently,the unmanned aerial vehicle(UAV)has been more and more used in reconnaissance.The reconnaissance information is generally by various sensors,which collect various measurement data,and video cameras,which collect video data.In traditional data colletion process.the measurement data and the video data are recorded independently.Therefore the quality of information generated is seriously affected since these two types of the data are not well synchronized.To solve this synchronization problem,this dissertation proposes the synchronized recording and replaying system for measurement and video data.The main contents of the dissertation are described as the following:1)The general design of the system.2)The digitalization of the UAV PAL standard video.This transformation is achieved by the DM642 hardware plation and the H.264 video Coding compression optimization algorithm.3)The transmission of the remote measurement data and the remote control data.To guarantee the quality of the transmission,the receiving time of remote measurement and remote control data frame is analyzed.Acording to the analysis result,the structure of the data recombination is designed and the time sections and the output time intervals of the data recombination are then calculated.These analysis and calculation are implemented on a single-boared computer hardware platform.4)The recording and replaying synchronization of the measurement data and the video data.The system synchronization condition is analyzed and the time standars of the recording and the replaying are then united.The synchronized recording and replaying processes,which includes data frame receiving,stamping,writing order and formate,fast reading and network transmission,are then designed based on the united time standars.The whole synchronization process is implemented on a single-boared computer hardware platform.5)The design of the recording and replaying process control and the visualization of the measurement data and the video data.The parameter visualization is achieved by sub-models.The test results show that the video data and the measurement data recorded by this system can keep the right input order and the time stamping when replaying.the measurement data and the video data are well synchronized for recirding and replaying.The system is capable to provide accurate synchronizeddata for the UAV reconnaissance information processing.