| 摘要 |
PROBLEM TO BE SOLVED: To provide a positioning device capable of correcting clock errors among sensors by a specific operation in its device, without having to use a broadcasting station for the correction of clock errors. SOLUTION: This positioning device includes a difference calculating means for calculating the arrival time difference and the Doppler frequency difference between received waves of sensors in accordance with the arrival times of electric waves, a sound wave or a light wave that is radiated or reflected by a target and is received by the plurality of sensors by two or more number of times. The positioning device, further, includes a positioning means that calculates the position and the speed of the target and a clock error between the sensors by simultaneously solving an equation for calculating the position of the target which is based on the calculated arrival time difference and applied with the correction of the clock error between the sensors and an equation for calculating the position and the speed of the target, based on the calculated Doppler frequency difference. COPYRIGHT: (C)2009,JPO&INPIT
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