Vehicle position detecting system and method
First Claim
Patent Images
1. A vehicle position detecting system comprising:
- in-vehicle equipment for receiving position indicating information from artificial satellites and detecting a position of a vehicle based on the position indicating information;
a map data storage device for storing map data; and
a present position correcting unit for matching a vehicular travel path with some road on the map data stored in the map data storage device thereby determining a corrected present position of the vehicle, whereinthe in-vehicle equipment includes a radio transmitter device and a transmission control unit for controlling the radio transmitter device to transmit vehicular travel path creating information for determining the vehicular travel path of the vehicle during a predetermined information transmission period, and whereina position correction station is provided at an external position outside of the vehicle, and includes the map data storage device, the present position correcting unit, a receiver device for receiving the vehicular travel path creating information transmitted from the in-vehicle equipment, and a vehicular travel path determining unit for determining the vehicular travel path based on the vehicular travel path creating information received by the receiver device.
1 Assignment
0 Petitions
Accused Products
Abstract
An information processing station having map data is provided at an external position outside of a vehicle. In-vehicle equipment determines a vehicular travel path of the vehicle, and transmits the determined vehicular travel path to the information processing station. The information processing station executes map matching processing of matching the vehicular travel path with a road on the map data, thereby correcting the present position of the vehicle. Accordingly, the present position of the vehicle can be determined with high precision without providing expensive map data to the vehicle.
-
Citations
9 Claims
-
1. A vehicle position detecting system comprising:
-
in-vehicle equipment for receiving position indicating information from artificial satellites and detecting a position of a vehicle based on the position indicating information; a map data storage device for storing map data; and a present position correcting unit for matching a vehicular travel path with some road on the map data stored in the map data storage device thereby determining a corrected present position of the vehicle, wherein the in-vehicle equipment includes a radio transmitter device and a transmission control unit for controlling the radio transmitter device to transmit vehicular travel path creating information for determining the vehicular travel path of the vehicle during a predetermined information transmission period, and wherein a position correction station is provided at an external position outside of the vehicle, and includes the map data storage device, the present position correcting unit, a receiver device for receiving the vehicular travel path creating information transmitted from the in-vehicle equipment, and a vehicular travel path determining unit for determining the vehicular travel path based on the vehicular travel path creating information received by the receiver device. - View Dependent Claims (2, 3, 6, 7, 8, 9)
-
-
4. A vehicle position detecting method comprising:
-
receiving position indicating information transmitted from artificial satellites by in-vehicle equipment provided in a vehicle and detecting a position of the vehicle based on the position indicating information; determining a vehicular travel path; map-matching the vehicular travel path with some road on a map stored in a map data storage device thereby determining a corrected present position of the vehicle, and transmitting vehicular travel path creating information, which includes a vehicle speed pulse and an angular displacement signal, from the in-vehicle equipment to a position correction station, which is provided at an external position outside of the vehicle and includes the map data storage device, wherein the determining and the map-matching are performed in the position correction station based on the vehicular travel path creating information received from the in-vehicle equipment and the map stored in the map data storage device, and wherein the corrected present position of the vehicle is transmitted from the position correction station to the in-vehicle equipment. - View Dependent Claims (5)
-
Specification