US 8,301,369 B2 · Position detection apparatus and position detection program

Abstract

A position detection apparatus includes a storage unit for storing map information including road information; a detection unit for detecting information for calculating an absolute position of a moving object; a position calculation unit for calculating the absolute position of the moving object and an error variance relating to an error of the moving object from the detected information; a read-out unit for reading out from the storage unit the road information of a road relating to the calculated absolute position; an existence probability calculation unit for calculating an existence probability of the moving object existing on the road from the absolute position, the error variance, and the read-out road information; a selection unit for selecting a position whose existence probability is maximum out of the calculated existence probability; and a map-matching processing unit for making the selected position a position of the moving object on the road.

Claims9

Dependent claims

A position detection apparatus comprising:

a storage unit configured to store map information including road information;
a detection unit configured to detect information for calculating an absolute position of a moving object;
a position calculation unit configured to calculate the absolute position of the moving object and an error variance relating to an error of the moving object from the information detected by the detection unit;
a read-out unit configured to read out from the storage unit the road information of a road relating to the absolute position calculated by the position calculation unit;
an existence probability calculation unit configured to calculate an existence probability of the moving object existing on the road from the absolute position and the error variance calculated by the position calculation unit, and the road information read out by the read-out unit;
a selection unit configured to select a position whose existence probability is maximum out of the existence probability calculated by the existence probability calculation unit;
and
a map-matching processing unit configured to make the position selected by the selection unit a position of the moving object on the road.

5 more elements

A non-transitory, computer-readable medium embodying a position detection program readable and performed by a computer of a position detection apparatus for deciding a position of a moving object on a road, the program, when executed by a computer, effects operations comprising:

storing map information including road information;
detecting information for calculating an absolute position of the moving object;
calculating the absolute position of the moving object and an error variance relating to an error of the moving object from the detected information;
reading out the road information of the road relating to the calculated absolute position from the stored map information;
calculating an existence probability of the moving object existing on the road from the calculated absolute position, the calculated error variance, and the read-out road information;
selecting a position whose existence probability is maximum out of the calculated existence probability;
and
making the selected position the position of the moving object on the road.

5 more elements

A position detection method performed by a computer, for deciding a position of a moving object on a road, the method comprising:

storing map information including road information;
detecting information for calculating an absolute position of the moving object;
calculating the absolute position of the moving object and an error variance relating to an error of the moving object from the detected information;
reading out the road information of the road relating to the calculated absolute position from the stored map information;
calculating an existence probability of the moving object existing on the road from the calculated absolute position, the calculated error variance, and the read-out road information;
selecting a position whose existence probability is maximum out of the calculated existence probability;
and
making the selected position the position of the moving object on the road.

5 more elements

Dependencies are inferred from the claim text.

Position detection apparatus and position detection program

Life of this patent

Position detection apparatus and position detection program

Life of this patent

Abstract

Claims9