Patent · US Active

Railway positioning system

US8525510B2 · kind B2 · utility

1Cited by

5References

4Claims

0Family size

Assignee

Bombardier Transportation GmbH · DE

Inventors

Askell Finnestad · Sola, NO
Hakan Lind · Uppsala, SE
Carsten Hasberg · Ilsfeld, DE
Stefan Hensel · Puchheim, DE
René Rütters · Weinheim, DE

Key dates

Filing date	Nov 28, 2008
Grant date	Sep 3, 2013
Priority date	—
Expiry date	Jun 1, 2030

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB61L25/026
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A railway positioning system provides an on-board speed measurement device (6) inducing eddy currents in the wayside structure at two spots along the travelling direction, measuring the variations of the magnetic field emitted by the wayside structure and determining position and speed by correlating the 2 measured signals known from U.S. Pat. No. 5,825,177 and a wayside coded tag (1) providing a coding recognizable by the onboard speed measurement device (6). The coded tag (1) consists of a bar (4) with several slots (3) in which metal blocks (2) of different sizes are mounted. The block sizes and positions are selected to represent a coding according to Quadrature Amplitude Modulation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.