System and method for early train detection
AssigneeWavetrain Systems AS
InventorsFredrik Lingvall, Tron Danielsen
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Abstract
A train detection security system and method include sensor units arranged for being fixed to at least one rail. The sensor units are arranged for detecting a first signal induced by a moving train. Each sensor unit is divided in at least a first chamber and a second chamber, where the first and second chambers are separated by an electromagnetic shield. The first chamber includes a piezoelectric element fixed to an outer wall of said first chamber, and an amplifier. A warning signal is generated in a control system based on the approaching train.
Claims19
A train detection security system comprising one or more sensor units arranged for being fixed to at least one rail of a rail track,
- wherein each of said sensor units, is arranged for detecting a first signal induced by a moving train and propagated through said rail,
- wherein each said sensor unit is divided in at least a first chamber and a second chamber, where said first and second chambers are separated by an electromagnetic shield, said first chamber comprising;
- a piezoelectric element fixed to an outer wall of said first chamber,
- an amplifier arranged for amplifying a first element output signal representing said first signal detected by said piezoelectric element where said first sensor output signal is said amplified output signal from said amplifier, said electromagnetic shield comprising one or more feed-through capacitors arranged for transferring said first sensor output signal from said first chamber to said second chamber.
A method for early detection of a moving train on a train track, by using a train detection security system comprising one or more sensor units arranged for being fixed to at least one rail, comprising the following steps:
- fixing one or more of said sensor units to at least one rail, wherein each of said one or more of said sensor units is divided in at least a first chamber and a second chamber, the first chamber and the second chamber being separated by an electromagnetic shield, said electromagnetic shield comprising one or more feed-through capacitors;
- detecting said one or more first signals by two or more piezoelectric elements fixed to an outer wall of said first chamber of each said sensor units;
- amplifying said first element output signal representing said first signal detected by said piezoelectric element, in an amplifier of said first chamber;
- feeding a first sensor output signal of each said sensor units, through said one or more feed-trough capacitors of the electromagnetic shield of said each sensor units, from said first chamber to said second chamber;
- and
- transferring said first sensor output signal or a modified first sensor output signal from said sensor units to said signal processor of said control system;
- receiving first sensor output signals representing said first signals in a signal processor;
- processing said first sensor output signal in said signal processor of a control system and generating a train warning signal representing characteristics of said moving train based on characteristics of said first sensor output signal.
Dependencies are inferred from the claim text.