VARIABLE FREQUENCY TRAIN DETECTION
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 14, 2014
Grant Date -
Oct 30, 2014
app pub date -
Apr 30, 2013
filing date -
Apr 30, 2013
priority date (Note) -
Granted
status (Latency Note)
Importance
Abstract
A method and device capable of reliable and accurate train prediction determinations that account for, and overcome the problems associated with, changing ballast conditions. The method and device will detect the presence of a train in an approach area based on a rail characteristic measured in relation to a first measurement frequency transmitted along the rails. If there is a condition such as a ballast condition that may affect the rail characteristic, the method and device will detect the distance and speed of the train based on a rail characteristic measured in relation to a second measurement frequency transmitted along the rails. Otherwise, the distance and speed of the train will be determined based on the rail characteristic measured in relation to the first measurement frequency.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully