G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 22/04 (2006.01)
Patent
CA 2655176
A sensor for measuring moisture content of a sample like hair, comprising: a micorstrip line; a directional coupler having a pair of generally parallel first (3) and second (4) strips defining a coupling gap therebetween; and a high frequency signal generator electrically coupled to said first strip (3) and operable to couple power to said second strip (4) with the sample placed as an overlay across said coupling gap to thereby generate a coupled power signal in said second strip having an amplitude related to moisture content of the sample. The coupled power signal from strip (4) is phase (13) shifted by the microstrip line and coupled to one port of a mimixer (12). The forward power signal from strip (3) is coupled to the other part of mixer (12).
Le capteur selon l'invention permet de mesurer la teneur en eau d'un substrat, ledit capteur comprend : un guide d'ondes coplanaire; un coupleur optique directif doté d'une paire de première et seconde barrettes de connexion généralement parallèles définissant un espace de couplage entre celles-ci; et un générateur de signal haute fréquence couplé électriquement à ladite première barrette de connexion et pouvant fonctionner de manière à coupler de la puissance à ladite seconde barrette de connexion, le substrat étant placé à travers ledit espace de couplage pour ainsi générer un signal de puissance couplé dans ladite seconde barrette de connexion dotée d'une amplitude liée à la teneur en eau du substrat.
Gartstein Vladimir
Moore David Burton
Sherman Faiz Feisal
Mbm Intellectual Property Law Llp
The Procter & Gamble Company
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