PORTABLE COMPLEX POSITIONING APPARATUS AND ITS PRESENT POSITION ESTIMATION METHOD

Title:

PORTABLE COMPLEX POSITIONING APPARATUS AND ITS PRESENT POSITION ESTIMATION METHOD

Document Type and Number:

Japanese Patent JP2001272247

Kind Code:

A

Abstract:

To estimate a present position precisely, irrespective of the walking ability (individual difference) and the movement state of a carrier.

While a positioning operation is performed by a GPS receiver, a walking rhythm is judged on the basis of the output of a pedometer. It is collated with the output of the GPS receiver to find a stride. A rhythm-stride table, with which the waling rhythm is made to correspond to the stride is created and updated. While the positioning operation by the GPS receiver is not performed due to a-blocking operation or an intermittent positioning operation, a stride is found by referring to the rhythm-stride table, on the basis of a walking rhythm which is derived from the output of the pedometer and is coupled to a movement direction, which is found on the basis of the output of a direction sensor to fine a movement vector. The vector is accumulated and added, and the present position is estimated.

Inventors:

KINOSHITA YUICHIRO
OGASA YOSHIHARU
BANDAI AKIRA
WAKI TOMOHIRO

Application Number:

JP2000087778A

Publication Date:

October 05, 2001

Filing Date:

March 28, 2000

Export Citation:

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Assignee:

JAPAN RADIO CO LTD

International Classes:

G01C22/00; G01C21/00; G01S19/48; G08G1/005; (IPC1-7): G01C21/00; G01C22/00; G01S5/14; G08G1/005

Domestic Patent References:

JP2000241193A	2000-09-08
JPH11194033A	1999-07-21
JPH10293038A	1998-11-04
JPH11259104A	1999-09-24
JPH112542A	1999-01-06
JPH10260055A	1998-09-29
JPH08160119A	1996-06-21
JPH08210868A	1996-08-20

Attorney, Agent or Firm:

Kenji Yoshida (2 outside)

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