The Research Of Traveling Data Recorder For Passenger Transportation And Freight Vehicle Based On GPS/Beidou

With the rapid development of transportation and automobile industry, traffic safety is becoming more and more popular. The vehicle traveling data recorder is a kind of vehicle equipment which can collect and store the information in real-time, such as travel speed, position information and vehicle information. Through these information can be achieved road safety warning and traffic accident responsibility judgment. All the information can be transmitted to the vehicle control center through the wireless transmission module. Passenger transportation and freight vehicle are road safety coefficient of high requirements and high road danger coefficient of two kinds of special vehicles, for passenger transportation and freight vehicle driving recorder can effectively reduce the incidence of malignant traffic accidents, The traveling data recorder for passenger transportation and freight vehicle based on GPS/Beidou is a for locating and positioning for a long time and blind positioning much improved design of car networking mobile terminal equipment.In the summary and analysis of the research status of the traveling data recorder, the combination of uC-OS II, GSM/GPRS, speech synthesis and dual mode positioning technology is combined with the existing problems, and a software and hardware design scheme based on GPS/Beidou for the vehicle traveling data recorder is proposed. Combined with the design requirements, the main functions of the software and hardware implementation are analyzed, deduces the calculation method of some parameters of components selection, postprocessing for interference, positioning time and other key indicators for the design and analysis of main circuit parameters. The traveling data recorder based on the requirements of national standard, increase function the dual-mode positioning and the speech synthesis, which can achieve high precision, short time and little blind area, and through the voice reminder, the driver can grasp the information of the vehicle control center in real time and the driving behavior warning information of the traveling data recorder. Finally, the hardware performance and software function test are carried out, the recorder system the average 5 m accuracy, and can be positioned within 30 s, in addition to providing short message real-time voice recording function and various vehicle parameters, driving data, location information of the broadcast function, can satisfy the vehicle management center of the traffic control and traffic management department to determine the responsibility of traffic accident afterwards the demand, and stable operation, lower power consumption, better maintainability.