Title:
METHOD AND DEVICE FOR DETECTING AN OCCUPIED OR FREE STATE OF A TRACK SECTION BY MEANS OF A TRACK CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2014/023578
Kind Code:
A3
Abstract:
The invention relates to a method and a device for detecting an occupied or free state of a track section by means of a track circuit (3), wherein at least one evaluation signal (1.1, 1.2; 8.1, 8.2) of the track circuit (3) is compared with a threshold value (UPull-in/UDrop-out; US), the overshooting or undershooting of which is a first criterion for the occupied or free state. Erroneous messages on the basis of the first criterion, more particularly in the case of a greatly fluctuating axle shunt effect, are avoided according to the invention by virtue of the fact that, as a second criterion, a rate of change of the signal profile of the evaluation signal (1.1, 1.2; 8.1, 8.2) is additionally determined and compared with a comparison value, upon the overshooting of which and/or upon the overshooting and undershooting of the threshold value (UPull-in/UDrop-out; US) the occupied state is detected.
Inventors:
BOHLMANN PEER (DE)
LUDE GERALD (DE)
RASCHKE BERND (DE)
LUDE GERALD (DE)
RASCHKE BERND (DE)
Application Number:
PCT/EP2013/065706
Publication Date:
June 26, 2014
Filing Date:
July 25, 2013
Export Citation:
Assignee:
SIEMENS AG (DE)
International Classes:
B61L1/18
Foreign References:
| DE3732159A1 | 1989-04-13 | |||
| DE2924247A1 | 1980-12-18 | |||
| DE102006033516A1 | 2008-01-17 |
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