GPS/dead-reckoning combination system and operating method thereof
First Claim
1. A GPS (Global Positioning System)/dead-reckoning combination system, comprising:
- a GPS receiver that receives an absolute position data of a moving unit from a GPS;
an inertia sensor that measures a displacement of the moving unit based on a dead-reckoning method;
a forward and backward movement judging unit that judges a state data concerning a forward or backward movement of the moving unit;
a dead-reckoning processor that measures a running distance and a position of the moving unit based on a dead-reckoning method in reference with the data provided from the inertia sensor and the forward and backward movement judging unit; and
a computation unit that estimates the current position of the moving unit in reference with the data from the GPS receiver and the dead-reckoning processor.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a GPS/dead-reckoning combination system and an operation method of the same. The GPS/dead-reckoning combination system includes a GPS receiver that receives an absolute position data of a moving unit from a GPS; an inertia sensor that measures a displacement of the moving unit based on a dead-reckoning method; a forward and backward movement judging unit that judges a state data concerning a forward or backward movement of the moving unit; a dead-reckoning processor that measures a running distance and a position of the moving unit based on a dead-reckoning method in reference with the data provided from the inertia sensor and the forward and backward movement judging unit; and a computation unit that estimates the current position of the moving unit in reference with the data from the GPS receiver and the dead-reckoning processor.
-
Citations
10 Claims
-
1. A GPS (Global Positioning System)/dead-reckoning combination system, comprising:
-
a GPS receiver that receives an absolute position data of a moving unit from a GPS;
an inertia sensor that measures a displacement of the moving unit based on a dead-reckoning method;
a forward and backward movement judging unit that judges a state data concerning a forward or backward movement of the moving unit;
a dead-reckoning processor that measures a running distance and a position of the moving unit based on a dead-reckoning method in reference with the data provided from the inertia sensor and the forward and backward movement judging unit; and
a computation unit that estimates the current position of the moving unit in reference with the data from the GPS receiver and the dead-reckoning processor. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An operation method of a GPS (Global Positioning System)/dead-reckoning combination system, comprising:
-
judging whether a moving unit is in a backward movement state;
judging whether the moving unit is in a region in which a GPS data can be received, when the moving unit is in a backward movement state;
extracting only a position data of the moving unit based on the GPS without considering an angle data of the moving unit based on the GPS, when the moving unit is in a region in which the moving unit can receive a GPS data;
estimating the current position of the moving unit by adapting an estimation algorithm based on a dead-reckoning method that uses a position data of the moving unit based on the GPS and a backward movement state data. - View Dependent Claims (8, 9, 10)
-
Specification