Method and device for distance measurement
AssigneeSiemens Aktiengesellschaft
InventorsUlrich Bock, Bernhard Evers, Lars Schnieder
Life of this patent
Estimating the term…
Abstract
A method and a device provide distance measurement between two points or one point on a path and a rail vehicle. In order to achieve a high measurement accuracy, the measurement of the propagation time of a radio frequency identification (RFID) signal is provided between the points or the point on a path and the rail vehicle.
Claims9
1-4. (canceled)
A method for distance measurement between two track points or one track point and a rail vehicle, which comprises the step of:
- measuring a delay time of a radio-frequency identification (RFID) signal between the track points or the track point and the rail vehicle.
An apparatus for measuring distances between two track points, the apparatus comprising:
- a radio-frequency identification (RFID) transmitter/receiver associated with a first track point;
- an RFID receiver/transmitter associated with a second track point;
- and
- means for delay-time measurement of an RFID signal between the first and the second track points.
An apparatus for measuring distances between one track point and a rail vehicle, the apparatus comprising:
- a radio-frequency identification (RFID) transmitter/receiver associated with a first track point;
- an RFID receiver/transmitter associated with the rail vehicle;
- and
- means for delay-time measurement of an RFID signal between the first track point and the rail vehicle.
Dependencies are inferred from the claim text.