System and method for early train detection
AssigneeWavetrain Systems AS
InventorsFredrik Lingvall, Tron Danielsen
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Abstract
Train detection security system and method for detecting a moving train are provided. The train detection security system includes one or more sensor units fixed to a rail of a rail track. The sensor units are arranged for detecting a first signal induced by a moving train and propagated through the rail. The system further includes a control unit including a signal processor arranged for receiving first sensor output signals representing the first signals from each of the one or more sensor units, processing the first sensor output signals and generating a train warning signal representing characteristics of the moving train based on envelope characteristics of the first sensor output signals.
Claims20
A train detection security system, comprising:
- one or more sensor units arranged for being fixed to at least one rail of a rail track, each of said one or more sensor units being arranged for detecting a first signal induced by a moving train and propagated through said rail and outputting a first sensor output signal;
- and
- a control unit comprising a signal processor implemented by a computer and arranged for receiving the first sensor output signal from each of said one or more sensor units, and processing said first sensor output signal,
- wherein said signal processor comprises;
- an envelope detector arranged for detecting an envelope signal of said first sensor output signal from each of said one or more sensor units;
- and
- an envelope signal comparator arranged for comparing a time segment of said envelope signal detected from said first sensor output signal from at least one of said one or more sensor units with a predefined envelope signal, and
- wherein said signal processor is arranged for generating a train warning signal indicating an approaching train when said envelope signal has an increasingly higher amplitude than said predefined envelope signal over said time segment, said train warning signal representing characteristics of said moving train.
A method for early detection of a moving train on a train track, by using a train detection security system with a control unit comprising a signal processor and one or more sensor units arranged for being fixed to at least one rail, the method comprising the steps of:
- detecting one or more first signals acoustically propagated from said train through said rail by said one or more sensor units;
- receiving first sensor output signals representing said one or more first signals in the signal processor;
- processing said first sensor output signals in said signal processor of the control unit;
- detecting an envelope signal of said first sensor output signal from each of said one or more sensor units;
- comparing a time segment of said envelope signal detected from said first sensor output signal from at least one of said one or more sensor units with a predefined envelope signal;
- and
- generating a train warning signal indicating an approaching train when said envelope signal has an increasingly higher amplitude than said predefined envelope signal over said time segment, said train warning signal representing characteristics of said moving train.
Dependencies are inferred from the claim text.