B - Operations – Transporting – 61 – L
Patent
B - Operations, Transporting
61
L
343/19
B61L 25/04 (2006.01) G06K 19/07 (2006.01) G07C 9/00 (2006.01)
Patent
CA 1290841
Title: Electromagnetic identification system. ABSTRACT: An electromagnetic identification system of the kind comprising a transmitter for generating an electromagnetic interrogation field in a detection zone, at least one passive responder capable of disturbing said interrogation field, and detection means for detecting a disturbance of the interrogation field caused by a responder. The responders comprise a single receiver circuit which in response to an interrogation field, via rectifier means, can supply energy to active digital encoding means comprising a binary-code defining means, and the encoding means is arranged, in operation, through a switch means, to vary the electrical characteristics of the receiver circuit in the rhythm of the binary code to generate a code signal that is detect- able by the detection means. The encoding means is arranged to control the switch member during pre-determined periods of time for varying the electrical characteristics of the receiver circuit. The pre-determined periods of time alter- nate with intervals during which the electrical character- istics of the receiver circuit are not affected. According to the present invention, the encoding means comprise a de- coding section which in response to a modulation of the interrogation field can, at least in part, change the binary code defined by the code-defining means, and there is provided a transmitter comprising a programmer for pro- viding such modulation. The transmitter is arranged, in operation, to generate a modulated interrogation field during said predetermined intervals.
535272
Fockens Tallienco W.h.
Kip Harm J.
Fockens Tallienco W.h.
Kip Harm J.
Macrae & Co.
N. V. Nederlandsche Apparatenfabriek Nedap
LandOfFree
Electromagnetic identification system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electromagnetic identification system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic identification system will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1330441