G - Physics – 05 – D
Patent
G - Physics
05
D
341/84
G05D 1/02 (2006.01)
Patent
CA 1232655
ABSTRACT A vehicle guidance system in which vehicles are guided along a traffic layout, includes a location identification arrangement for identifying locations along the layout and for enabling each vehicle to derive information for directing the vehicle in its movement along the traffic layout. The arrangement includes an interrogator for each vehicle including a coil which is excited by a high frequency signal, and a responder for each location including an identification signal generator for generating a signal encoded to represent an identification code for the location, a second coil located relative to the pathway for the vehicle to enable signal coupling to occur between the two coils as the vehicle moves adjacent to the responder in its travel along the traffic layout, and a modulating circuit responsive to the encoded signal to alternatively de-tune and tune the responder coil in correspondence with the information code, the interaction between the two coils resulting in modulation of the frequency signal with the information code which is detectable by a signal detector of the interrogator.
478149
Flynn James A.
Gagner Mark B.
Barrett Electronics Corporation
Osler Hoskin & Harcourt Llp
LandOfFree
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