G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 13/75 (2006.01)
Patent
CA 2628112
A system for ascertaining the range from an interrogator to one or more transponders comprises an interrogator that transmits an RF carrier that is received by each transponder, the energy in the received carrier being used to charge up a storage capacitor in each senses the termination of the received carrier and initiates a known delay interval different from those of the other transponders. At the end of the delay interval, the transponder transmits an RF signal which is received by the interrogator. The interrogator then calculates the range to the transponder by subtracting the known delay interval from the round trip time registered in the timer.
La présente invention concerne un système permettant de vérifier la distance entre un interrogateur et un ou plusieurs transpondeurs. Ce système comprend un interrogateur émettant une porteuse HF reçue par chacun des transpondeurs. L'énergie propre à la porteuse reçue sert à recharger un condensateur de stockage de chaque transpondeur. Le transpondeur détecte la fin de la porteuse reçue et lance un intervalle de temporisation défini, différent de ceux des autres transpondeurs. A la fin de l'intervalle de temporisation, le transpondeur émet un signal HF reçu par l'interrogateur. Pour calculer la distance du transpondeur, l'interrogateur prend le temps d'aller-retour connu de l'horloge et en soustrait l'intervalle de temporisation.
Novatel Inc.
Smart & Biggar
LandOfFree
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