Title:
PORTABLE POSITION DETECTOR AND POSITION MANAGING SYSTEM
Document Type and Number:
Japanese Patent JP3532773
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a portable position detector for enhancing a walker's position detecting accuracy by an autonomous navigation by more accurately detecting a walker's moving bearing even if reception of GPS signal is impossible (or without receiving the signal) and altering to a step meeting a walking state and a position managing system.
SOLUTION: A moved position is detected by calculating 'number of steps ×step width' by using a portable position detector of the user, and corrected to a step meeting a walking state from a walking time per one step by using an acceleration sensor 23. A person's moving position is detected with good accuracy via an autonomous navigation by detecting a moving direction by using a geomagnetic sensor 13. Particularly, even in the case of positioning at a forest, a valley among buildings or the like capable of receiving no GPS satellite signal due to the presence of a multi-story building, a cliff, the forest or the like, the position of the person carrying the detector by the navigation applicable to a walker and portable size and weight can be known practically with sufficient accuracy while enhancing an accuracy of the step.
Inventors:
Matsuoka, Yoshio
Yamamoto, Akito
Yamamoto, Akito
Application Number:
JP28878498A
Publication Date:
May 31, 2004
Filing Date:
September 26, 1998
Export Citation:
Assignee:
JATCO CORP
International Classes:
G01C21/00; G01C21/10; G01C22/00; (IPC1-7): G01C21/00; G01C21/10
Attorney, Agent or Firm:
鹿嶋 英實
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