Detection And Estimation Of Vehicle Motion Parameters Based On GPS

With the rising economy and improving the quality of people’s lives, people’s safetyawareness also increases the car’s safety requirements have gradually improved,automotive safety technology has become one of the main direction of research.People inthe past enhanced use vehicle safety belts, airbags, bumpers and other devices, becausethe complexity of the road cars, these hard conditions in road transport is no longer ableto effectively prevent accidents.Therefore, reducing and preventing accidents and vehiclesafety technology research has become the most important issue to be solved.Vehicle motion state parameters able to characterize the movement of cars, but alsoa major automotive active safety performance indicators.Timely and accurateunderstanding of vehicle motion parameters to enhance driving safety and vehicle activesafety technology has great significance.Some cars moving past state parametersobtained are relying on a single test instrument, it will not only make the detectedparameters do not fully test the system information but also result in less andinconvenient to use, while different parameters corresponding to the specific testingneeds sensor, which indirectly raises the costs and errors along with the growing numberof devices using the accumulated increases.Therefore, studying a small, feature set, easyto use, portable vehicle motion detection equipment has important practical significanceand economic value.This topic is based on embedded technology, the use of TrimbleCondor GPS C2626module real-time acquisition vehicle running state satellite data, andin the ARM development board processing and display, according to these data,combined with three degrees of freedom model of car, estimate the state of motion of thevehicle parameters (such as cars particle sideslip angle, vertical speed and lateral speed),as a research vehicle safety and active control basis.The main subject is studied from the following aspects:(1) GPS module peripheral interface circuit design, circuit design and display serialport expansion module, power module hardware circuit design.(2) In Visulstudio2005(referred VS2005) programming environment designed toachieve the GPS information collection application.(3) The GPS module with the corresponding serial interface circuits and embeddedsystems of Wince6.0ARM development board connected for real vehicledetection,According to the obtained data, such as the car running the longitude, latitude,speed, time, direction angle data, positioned at a certain time the car particle coordinates,and then three degrees of freedom of coordinate with car model and the corresponding algorithm, in order to complete when the car is running some of the parameters isestimated.Finally, the estimation of the parameters of the simulation for verification.Thesis research results provide the basis for vehicle active safety control, environmentaltesting is further complicated laid the necessary foundation.on the latter...