Raspberry Pi based lap counter for amateur car racing
This article presents the design of a lap counter and timer that can be used in amateur car racing. Main functions of this computer to count laps, measure lap time, vehicle speed and accelerations. The system uses a GPS module, accelerometer and magnetometer sensors.
Application of the vehicle navigation via GPS carrier phase
Today, Global Position System (GPS) is extensively employed in navigation and survey systems. Because the GPS can provide navigation data such as position, velocity, attitude and heading of vehicles, its contributions are numerous not only in national defense and military but also in commercial fields. However, GPS is usually used to provide absolute position information. In attitude problems, the inertial navigation system (INS) is usually employed in navigator to solve its attitude. In this paper, the main purpose is to perform the real-time kinematic GPS and the attitude determination using the GPS carrier phase observation. A navigation vehicle has been designed in order to test and verify the accurate performance of the system by the proposed real-time kinematic GPS and attitude determination algorithms. Through some experiments, the proposed approaches satisfy our requirements via the test.
Road profile recognition for autonomous car navigation and Navstar GPS support
We discuss autonomous car navigation based on updating dead reckoning (DR) by road profile recognition (RPR). The navigation system requires sensors to detect changes in altitude and driving direction which are installed in modern cars for different purposes (e.g. ABS sensors). The layout of the navigation system is discussed and simulations are carried out over driving distances of approximately 150 km on the basis of realistic road data and ordinary sensor accuracies. Positioning errors of lower than 10 m (standard deviation) are observed. To achieve this accuracy the synchronization error between measured and mapped data must be continually estimated. The introduced navigation method is ideal to complete present commercial car navigation systems using Navstar GPS.