US 8,477,067 B2 · Vehicle localization system

Abstract

A localization system for a vehicle running on a guideway including portions obscured from satellite view has a number of GNSS receivers placed at strategic locations along the guideway in view of navigation satellites. GNSS transmitters retransmit received GNSS signals along an obscured portion of the guideway. Coded targets are placed at known locations along the guideway. A GNSS receiver on the vehicle picks up GNSS signals directly from the navigation satellites or retransmitted from the GNSS transmitters when on an obscured portion of the guideway. A proximity sensor on the vehicle detects the coded targets. An on-board computer synchronizes the location obtained from the GNSS signals with the location obtained from the proximity sensor. The vehicle is thus able to determine its position even in an obscured portion, such as a tunnel.

Claims16

Dependent claims

A localization system for a vehicle running on a guideway including portions obscured from satellite view, comprising:

at least one GNSS receiver placed at one or more strategic locations in view of navigation satellites;
GNSS transmitters for retransmitting received GNSS signals along an obscured portion of the guideway;
coded targets placed at known locations along the guideway;
a GNSS receiver on the vehicle for picking up GNSS signals directly from the navigation satellites or retransmitted from the GNSS transmitters when on an obscured portion of the guideway;
a proximity sensor on the vehicle for detecting the coded targets;
and
an on-board computer for synchronizing the location obtained from the GNSS signals with the location obtained from the proximity sensor.

4 more elements

Dependencies are inferred from the claim text.

Vehicle localization system

Life of this patent

Vehicle localization system

Life of this patent

Abstract

Claims16