ABSTRACT
Traffic survey is a very important foundation work.The survey data is the important basis of the practice and research work in transportation plan,traffic analysis,traffic facility design,construction and operation management,traffic control,traffic safety,transportation flux and so on.In order to develop our country's road traffic career,it is essential to carry out the traffic survey work systemic and planedly.
The raffic survey includes the volume of traffic,driving speed,density,traffic accident,OD investigation,traffic flux investigation and so on.The different goal counterparts different method.But by the existing investigation method,most investigations need to use lots of manpower and resource and the survey method is unadvanced.Some traffic survey equipment is simple,primitive, has low precision,unable to connect computer.All these cause the shortcoming of heavy later period data ordering and analysis work and so on.To adapt the modern research and the need to developing,one new data acquisition and the processing system is necessay.
Based on the systematic analysis of the various traffic survey and analysis methods proposed on the basis of the portable traffic survey equipment design.The system hardware to MCU-based controller, to OCM12864 liquid crystal displays for human-computer interface, typing in real-time data acquisition and storage, through serial communications module to achieve data transfer between the SCM and the PC .Under the present system of machine-SCM C programming language to some of the preparation, procedures and some parts of one-to-one hardware module, there are eight parts: the main function, 8155 and the initial reading and writing part of the liquid crystal display, keyboard Input and disruption of the watchdog part of the real-time clock, AT24C64 reading and writing part of the serial communication, through-Weifu Simulator simulation software debugging.