Development Of Vehicle Traveling Data Recorder On Satellite Positioning

The use of the vehicle data recorder, to prevent fatigue driving, constraintsdriving people’s bad driving behavior, to ensure the safety of vehicle and roadtraffic accident analysis appraisal plays an important role. A new generation ofsatellite positioning vehicle traveling data recorder not only has the above functions,but also has the functions of vehicle real-time monitoring, warning, rob, guardagainst theft and accident prevention,accident reminds,and accident report to thepolice for help. At present, China’s independent Beidou positioning system has beenrelatively mature, uses Beidou positioning in order to respond the call of the State.System uses ARM9controller MB9G711and other functional components,designs a satellite positioning tachograph. The functional components include: apower control circuit, a liquid crystal display circuit, the printer drive circuitmodule, and Beidou GPRS module control circuit. Analyzes the system interference,and puts forward the suppression measures.System ported Israel’s open source code, and completed the preparation ofrelated hardware drivers under its framework; Beidou positioning system usinggeographic information collection, filtering discontinuous datas when the satellitesignal is weak; triaxial calculating the level of the acceleration sensor, a detailedanalysis of the working principle of the calculation rollover and related algorithms;using ray method to calculate the electronic fence, in order to determine whetherthe vehicle is traveling in a predetermined route or area.On the development of satellite positioning tachograph,we have done a lot ofexperiments, the indicators meet the design requirements, with a stronganti-jamming capability,system has passed the national certification standards andindustry standards, now in mass production.