Patent
Positioning device and positioning method
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TLDR
In this paper, the relation between a slip ratio and an acceleration determined from information of the sensor is predetermined from information acquired from the wheel speed sensor 1 and the receiver 2 when the position of the moving body can not be updated by the positioning result from the GPS receiver 2.Abstract:
PROBLEM TO BE SOLVED: To provide a positioning device and method capable of correcting a position update error of a measured value of a wheel speed sensor unit resulting from a slip, and updating the position of a moving body with high precision SOLUTION: When the position of the moving body can be updated by a positioning result from a GPS receiver 2, the relation between a slip ratio Sr and an acceleration Aw determined from information of the sensor is predetermined from information acquired from the wheel speed sensor 1 and the receiver 2 When the position of the moving body can not be updated by the positioning result from the receiver 2, a slip ratio Sr corresponding to a found acceleration Aw' is calculated from the above relation By using this slip ratio Sr and correcting the measured value of the wheel speed sensor unit, and performing a position update by using this corrected value, the precision of updating of the position of the moving body can be raised COPYRIGHT: (C)2007,JPO&INPITread more
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References
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Patent
Carrier differential positioning apparatus
TL;DR: In this article, a carrier differential positioning (CDP) system is used to obtain the latest position of a mobile station by keeping the high accuracy of its positioning operation without a time delay.
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Integration sensing unit
TL;DR: In this paper, the authors proposed an integration sensing unit consisting of a first means, a second means, means 3 for operating the difference of output between the first and second means and means 5 for estimating the error of the first means 1.
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Traveling distance detecting device
TL;DR: In this paper, the authors proposed a simple external operation by providing a vehicle speed measuring part to transmit radio waves toward the ground and measure the speed of a vehicle from the Doppler shift of the reflected waves, etc.