Interruption-free hand-held positioning method and system thereof
AssigneeAmerican GNC Corporation
InventorsChing-Fang Lin, Hiram McCall
Life of this patent
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Abstract
An interruption-free hand-held positioning method and system, carried by a person, includes an inertial measurement unit, a north finder, a velocity producer, a positioning assistant, a navigation processor, a wireless communication device, and a display device and map database. Output signals of the inertial measurement unit, the velocity producer, the positioning assistant, and the north finder are processed to obtain highly accurate position measurements of the person. The user's position information can be exchanged with other users through the wireless communication device, and the location and surrounding information can be displayed on the display device by accessing a map database with the person position information.
Claims89
An interruption-free hand-held positioning system for a user on land, comprising:
- a main IMU based interruption-free positioning module is utilized for sensing motion measurements of said user and producing interruption-free positioning data of said user;
- a positioning assistant providing interruptible positioning data to assist said main IMU based interruption-free positioning module to achieve an improved interruption-free positioning data of said user;
- a wireless communication device being built in for exchanging said improved interruption-free positioning data with other users;
- a map database providing map data to obtain a surrounding map information of location of said user by accessing said map database using said interruption-free positioning data;
- and
- a display device for visualizing said interruption-free positioning data of said user using said surrounding map information.
An interruption-free hand-held positioning method for a user on ground, comprising the steps of:
- (a) sensing motion measurements of said user by a main IMU (Inertial Measurement Unit) to produce digital angular increments and velocity increments signals in response to a user motion,
- (b) providing interruptible positioning data to assist said main IMU based interruption-free positioning module by a positioning assistant,
- (c) producing interruption-free positioning data of said user using motion measurements, and improving said interruption-free positioning data of said user when said interruptible positioning data is available,
- (d) exchanging said interruption-free positioning data with other users by a wireless communication device,
- (e) providing map data to obtain a surrounding map information of location of said user by accessing a map database using said improved interruption-free positioning data, and
- (f) visualizing said interruption-free positioning data of said user using said surrounding map information by a display device.
Dependencies are inferred from the claim text.