Intermittent facility for transmitting information between a...

Details Intermittent facility for transmitting information between a... Intermittent facility for transmitting information between a...

H - Electricity

04

B

325/2

H04B 5/00 (2006.01) B61L 25/04 (2006.01)

Patent

CA 1186741

Abstract of the Disclosure A facility is disclosed comprising an on-board interro- gator and a passive trackside transponder which transmits data messages to the interrogator on a single FM channel and draws the necessary transmitting energy from an alternating magnetic field produced by the interrogator. The antenna of the inter- rogator and the transponder are ferrite-rod antennas which are enclosed in housings similar to that used in inductive signalling equipment. The magnetic interaction between the active portion and the passive portion of the facility is used to locate faulty passive transponders.

388558

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