G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 22/00 (2006.01) G01N 22/04 (2006.01)
Patent
CA 2500191
A method and an apparatus is described to measure at least one physical parameter of a substance such as moisture and salt content. This is done by transmitting a microwave beam through the material to be measured and detect only a reflection of a predetermined polarity of the transmitted waves. To accomplish this a polarising plate is used so that only cross-polarised microwaves, which pass through the substance are detected and the co-polar reflections from surrounding structures are excluded. The object can either be moving as on a conveyer belt or in a rest position.
L'invention concerne un procédé et un appareil permettant de mesurer au moins un paramètre physique d'une substance telle que l'humidité et la teneur en sel. Pour ce faire, on émet un faisceau de micro-ondes dans la matière à mesurer pour ne détecter que la réflexion d'une polarité prédéterminée des ondes émises. On utilise également une plaque de polarisation pour ne détecter que les micro-ondes de polarisation croisée qui traversent la substance et exclure les réflexions copolaires des structures avoisinantes. L'objet peut être mobile, comme sur une bande transporteuse, ou statique.
Jonsson Olafur H.
Sangster Alan John
Thorgeirsson Jon Thor
Intelscan Orbylgjutaekni Ehf
Kirby Eades Gale Baker
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