Direction detecting device

Details Direction detecting device Direction detecting device

1992-07-09

1994-09-20

Chin, Gary

Boots, shoes, and leggings

364454, 342357, 340988, G06F 1550

Patent

active

053495306

ABSTRACT:
A direction detecting device includes the following elements. A position measurement unit receives an electric wave from a satellite and generates first direction data from the electric wave. A geomagnetic sensor generates second direction data. A memory unit, which is coupled to the position measurement unit and the geomagnetic sensor, stores the first direction data and the second direction data respectively obtained at a previous measurement timing. A correction operation unit, which is coupled to the position measurement unit, the geomagnetic sensor and the memory unit, obtains data related to a true magnetic circle from the first direction data and the second direction data stored in the memory unit and the first direction data and the second direction data respectively obtained at a current measurement timing and for correcting an error contained in the current second direction data in accordance with the data related to the true magnetic circle.

REFERENCES:
patent: 4743913 (1988-05-01), Takai
patent: 4903212 (1990-02-01), Yokouchi et al.
patent: 4912645 (1990-03-01), Kakihara et al.
patent: 4924402 (1990-05-01), Ando et al.
patent: 5060162 (1991-10-01), Ueyama et al.
patent: 5119301 (1992-06-01), Shimizu et al.
European search Report Application No. EP 92306329.1 dated Sep. 28, 1992.

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