The Research And Development On Vehicle Traveling Data Recorder

Vehicle traveling data recorder is a special digital electronic recorder which used to acquire and store vehicle's traveling speed, time, distance and other related status information, and then transmit data via USB and RS232 interface. The use of vehicle traveling data recorder can not merely halt the break in traffic rules and regulations, restrain the drivers from being drive at bad habit, and can prevent the traffic accident effectively, it can also offer scientific, faithful initial data for the tipstaffs carries on the accidents. So it plays a very important role in transportation management.In this paper, system requirement of vehicle traveling data recorder is analyzed at first. The system is consisted of data acquisition sub-system, data storage sub-system and correspondence interface sub-system. Beyond to the request of GB, image gathering and store function is expanded, as it can offer more visual basis for the cause of traffic accident.Data acquisition sub-system is also designed in this paper, and the hardware circuit is given. Furthermore all function driver programs of modules are introduced, including speed gathering module, implus gathering module, clock module, power source module and the communication of double-CPU interface module.Data storage sub-system is described in detail. The hardware circuit is designed and all the function driver programs are introduced, including keyboard module, display module, printer module, IC memory card module and IC status authentication card module. The corresponding software flow chart is shown too.This paper introduces Image gathering and store module. The hardware circuit is given, including ZM460 digital camera module, clock circuit, flash memory circuit. Corresponding software flow chart and the attentions of programming are also inside.Data analyzing software is introduced, the overall requirement of data analyzing software is analyzed, and the demand of data uploading, data downloading and data output have described in detail. The interface of data analyzing software is shown.The paper ends with a sum-up of the research work and proposes a further conception of the new system.