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1. WO2008037547 - DEVICE FOR INTERROGATING A PASSIVE SENSOR OF THE SURFACE ACOUSTIC-WAVE TYPE

Publication Number WO/2008/037547
Publication Date 03.04.2008
International Application No. PCT/EP2007/058692
International Filing Date 21.08.2007
IPC
G06K 7/08 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
7Methods or arrangements for sensing record carriers
08by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
CPC
G06K 7/086
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
7Methods or arrangements for sensing record carriers, ; e.g. for reading patterns;
08by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
082using inductive or magnetic sensors
083inductive
086sensing passive circuit, e.g. resonant circuit transponders
Applicants
  • SENSEOR [FR]/[FR] (AllExceptUS)
  • FRIEDT, Jean-Michel [FR]/[FR] (UsOnly)
  • MARTIN, Gilles [FR]/[FR] (UsOnly)
Inventors
  • FRIEDT, Jean-Michel
  • MARTIN, Gilles
Agents
  • ESSELIN, Sophie
Priority Data
06/0856529.09.2006FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) DEVICE FOR INTERROGATING A PASSIVE SENSOR OF THE SURFACE ACOUSTIC-WAVE TYPE
(FR) DISPOSITIF D'INTERROGATION D'UN CAPTEUR PASSIF DE TYPE A ONDES ACOUSTIQUES DE SURFACE
Abstract
(EN)
The invention relates to a device for remotely interrogating the resonance frequencies of a passive sensor, said device comprising means for transmitting an interrogation signal at a plurality of frequencies to said passive sensor, means for receiving a signal including the resonance frequencies of the passive sensor, means for analysing said frequencies, wherein the transmission signal is a continuous signal, and further comprising a demodulator and a low-pass filter for selecting a band of frequencies centred on the resonance frequency of the passive sensor.
(FR)
L'invention concerne un dispositif d'interrogation à distance des fréquences de résonance d'un capteur passif, ledit dispositif comprenant des moyens pour émettre un signal d'interrogation à une pluralité de fréquences en direction dudit capteur passif, des moyens pour recevoir un signal comportant les fréquences de résonance du capteur passif, des moyens pour analyser lesdites fréquences, dans lequel le signal d'émission est un signal continu et comprenant en outre un démodulateur et un filtre dit passe-bas, permettant de sélectionner une bande de fréquences centrées sur la fréquence de résonance du capteur passif.
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