Pioneer Corporation

Seiji Imada

Isao Endo

Seiji Goto

Tatsuya Okamoto

An angular velocity detection device includes an angular velocity detector for delivering a first sensor output corresponding to an angular velocity of a mobile unit; a learning unit for learning a sensitivity coefficient in accordance with the first sensor output and an output provided by a GPS positioning unit; an acceleration detector for delivering a second sensor output corresponding to an acceleration of the mobile unit; a sensitivity coefficient correction unit for determining a corrected sensitivity coefficient in accordance with the sensitivity coefficient and the second sensor output; and an angular velocity converter for multiplying the first sensor output by the corrected sensitivity coefficient to thereby calculate the actual angular velocity of the mobile unit. The angular velocity detection device allows the angular velocity converter to use the corrected sensitivity coefficient to calculate each actual angular velocity of the mobile unit.

Angular velocity detection device

A method of detecting an angle is provided with processes of: setting a bias voltage, as a standard voltage, which is an output voltage outputted from an angular velocity sensor ( ) under a predetermined condition; and calculating the angle on the basis of a difference between the output voltage and the set or updated standard voltage. It is further provided with processes of storing time data, which indicate a time of setting or updating the standard voltage, in correspondence with standard voltage data; estimating a value of the bias voltage of the angular velocity sensor at each time between times of setting or updating the standard voltage; and correcting the calculated angle on the basis of a difference between a value of the standard voltage used in the calculation process and the estimated value of the bias voltage.

Method of and apparatus for detecting angular velocity, method of and apparatus for detecting angle, navigation system, program storage device, and computer data signal embodied in carrier wave

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Saitama-ken, Japan

Seiji Imada