Design Of Vehicle Driving Cycle Data Acquisition Device And System Integration

Designed for a certain type of vehicles (such as cars, light vehicles, heavy vehicles)Vehicle driving cycle designated to represent in a particular environment (such as urban,suburb) speed--time history.Influence factors by the road characteristics, geographical featuresand other traffic, the running conditions in different regions and typical city have differentcharacteristics.Firstly,based on lots of papers,the key technology of the three kinds of mode of vehicledriving cycle data acquisition system were analyzed such as GPS, OBD and the embeddedstorage technology;secondly, vehicle driving cycle data acquisition system hardware weredesigned such as the minimum system design (reset circuit, clock circuit, JTAG debug circuit,power supply circuit, EEPROM circuit and FLASH circuit),GPS module circuit, SD cardstorage circuit and the vehicle state information collection module circuit. The program wasdesigned for GPS, OBD and SD card and at the same time used the watchdog technology toimprove system stability.At last, the sampling frequency,the file level storage and system accuracy test werecompleted and at the same time planed for the late prospects.