VEHICLE BEARING PRESUMING SYSTEM

摘要

PROBLEM TO BE SOLVED: To measure the bearing data of a vehicle which become a key parameter at the time of measuring the position of a scanning vehicle by using both GPS satellite navigation and self-contained navigation with high accuracy. SOLUTION: A GPS data receiving, editing, and processing section 4 inputs the modulated data 101 of a GPS receiver 1 and supplies GPS reception data 401 containing the positional data of a vehicle and status data 403 indicating the receiving state of the input of the receiver 1 to a self-contained navigation position measuring and processing section 6. The section 4 also supplied GPS bearing data 402 contained in the data 401 to an advancing bearing calculating section 52 and the status data 403 to an bearing correcting and discriminating section 51. The relative angular velocity data 201 outputted from a relative angular velocity sensor 2 are supplied to the section 52 and the speed data 301 outputted from a speed sensor 3 are supplied to the sections 51 and 6. The section 51 discriminates the quality of the data 402 whether or not the data 402 can be used for correction based on the inputted data 403 and 301 and inform the section 52 of the discriminated results. The section 52 supplies highly accurate advancing bearing data 501 obtained by adding the data 402 and 201 to each other to the section 6.