Does IR use any other method of Last Vehicle Proving

July 16, 2019, 12:24 PM
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Apart from axle counters or track circuits that indicate that a train has passed out of a section of track, in some places magnetic detectors are used for last vehicle proving. A permanent magnet suspended a few inches above the track from the last vehicle of a train passes right over a sensor which is positioned in the center of the track. The sensor works on the principle of the Hall effect, detecting and amplifying the Hall e.m.f. induced by the passage of the magnet. In other sensors, the passage of the magnet may also change the reactance of a saturable reactor, thereby triggering a relay or tripping a circuit.

Source – IFRCA.org

 

 

 

 
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