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.
Location tracking of test vehicles using accelerometers
This paper proposes a cost effective solution to localized mobile positioning with high accuracy requirements when high grade GPS is cost excessive or unavailable. Specifically this solution is targeted for accurate position determination of test vehicles on a known stretch of bridge.
A Multiple Filter Approach for Precise Kinematic DGPS Positioning and Carrier-Phase Ambiguity Resolution
: The most precise relative positioning obtained using differential GPS depends on an accurate determination of carrier-phase integer ambiguities. To achieve high precision, many current static and kinematic surveying algorithms use a floating-point solution until enough information becomes available to fix the carrier-phase ambiguities accurately. A new method for kinematic carrier-phase ambiguity resolution, based upon a multiple-model adaptive Kalman filter, is presented in this paper. This method starts with the floating-point results, yet attains the precision of the correct fixed-integer solution smoothly and rapidly, eliminating the need to decide when to switch from the floating to the fixed-integer solution. This method is based on a blending of solutions from multiple filters, each of which hypothesizes a different ambiguity set. The new method was evaluated during ground and flight tests. Initial results indicate that the method is capable of quickly resolving carrier-phase ambiguities and smoothly transitioning to a highly accurate (centimeter-level) navigation solution.