NAVIGATION SYSTEM, METHOD OF POSITION ESTIMATION AND METHOD OF PROVIDING NAVIGATION INFORMATION
First Claim
1. A navigation system worn by a user, comprising:
- a motion sensor group, comprising a plurality of motion sensors, the plurality of motion sensors are built-in motion sensors worn by the user; and
a host device, configured for providing navigation information to the user, wherein the modified motion sensor group is worn on one or more parts of the user so that a moving direction of the user is the same as a heading direction calculated from the motion sensor group.
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Accused Products
Abstract
A hybrid-computing navigation system worn by a user includes a modified motion sensor group which includes 9-axis or 10-axis motion sensors that are built-in, and a host device configured for providing navigation information, in which the modified motion sensor group is worn on the user so that a moving direction of the user is the same as a heading direction calculated from the modified motion sensor group. The modified motion sensor group provides step counting and absolute orientation in yaw, roll and pitch using a sensor fusion technique. The navigation system further includes at least one wireless sensor at wifi hot spot to perform sensor fusion for obtaining an absolute position of an estimated position of the user. Sensor fusion combining with location map are used to perform location map matching and fingerprinting. A method of position estimation of a user using the navigation system is also disclosed.
18 Citations
16 Claims
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1. A navigation system worn by a user, comprising:
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a motion sensor group, comprising a plurality of motion sensors, the plurality of motion sensors are built-in motion sensors worn by the user; and a host device, configured for providing navigation information to the user, wherein the modified motion sensor group is worn on one or more parts of the user so that a moving direction of the user is the same as a heading direction calculated from the motion sensor group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of position estimation of a user, comprising:
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obtaining a moving information in the coordinates of yaw, roll and pitch; extracting a gravity change and a linear acceleration from the moving information; determining step counts of the user by processing the linear acceleration; calculating a traveling distance of the user according to the determined step counts; and determining a current estimated position according to a previous estimated position, the traveling distance and the moving information.
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Specification