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US 2006/0142938 A1Published application
Inertia position system
AssigneeInstitute for Information Industry
InventorsChih-Hung Lin, Chih-Sheng Chang
Life of this patent
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Abstract
An inertial positioning system is disclosed, which includes at least one sensor, an inertial processing unit, a step-distance determination module, a external positioning module, a Kalman filter and an output terminal, wherein the step-distance determinate module estimates an inertial step-distance via analyzing peak values of velocity and time intervals, and in addition, the external positioning module provides a precise initial state to effectively constrain error of the estimated step-distance.
Claims14
An inertial positioning system, comprising:
- at least one sensor, providing at least one motion signal;
- an inertial processing unit, coupling to the at least one sensor and receiving the at least one motion signal to estimate a step-distance, wherein the inertial processing unit can provide the at least one reference data for calculation;
- a step-distance determination module, coupling to the inertial processing unit and receiving the estimated step-distance and the at least one reference data to provide an error correction parameter;
- an external positioning module, providing a position data;
- a position mapping module, coupling to the external positioning module and providing an initial state based on the position data;
- and
- a Kalman filter, receiving the estimated step-distance, the error correction parameter and the initial state, thereby processing them [Safer to write ‘them’ as full nouns.] to provide at least one feedback parameter to the inertial processing unit and the step-distance determination module,
- wherein the Kalman filter transfers the estimated step-distance to the output terminal so that the output terminal can display the estimated step-distance.
5 more elements
An inertial positioning system, comprising:
- at least one sensor, providing at least one motion signal;
- an inertial processing unit, coupling to the at least one sensor and receiving the at least one motion signal to estimate a step-distance, wherein the inertial processing unit can provide the at least one reference data for calculation;
- a step-distance determination module, coupling to the inertial processing unit and receiving the estimated step-distance and the at least one reference data, wherein the step-distance determination module derives the at least one peak value of velocity and the at least one time interval from the at least one reference data, and an error correction parameter is obtained in accordance with a step-distance determination method;
- an external positioning module, providing a position data;
- a position mapping module, coupling to the external positioning module and providing an initial state based on the position data;
- and
- a Kalman filter, receiving the estimated step-distance, the error correction parameter and the initial state, thereby processing them to provide at least one feedback parameter to the inertial processing unit and the step-distance determination module,
- wherein the Kalman transfers the estimated step-distance to the output terminal so that the output terminal can display the estimated step-distance.
5 more elements
Dependencies are inferred from the claim text.