G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 33/12 (2006.01) G01N 33/48 (2006.01) G01N 33/487 (2006.01) G01N 27/74 (2006.01)
Patent
CA 2438423
Apparatus for detection and measurement of agglutinations of magnetic particles employing Hall sensors (15, 16). A low frequency AC signal (24) is employed to excite or bias the Hall sensors which reside in a DC magnetic field (23). The particles are moved into operative relationship with the Hall sensors in order to generate a signal representing the number of particles on the substrate (22). The method for such detection and measurement is also part of the invention.
L'invention porte sur un appareil de détection et de mesure d'agglutinations de particules magnétiques à l'aide de sondes de Hall (15, 16). A cet effet, on utilise un signal c.a. (24) à basse fréquence pour exciter ou polariser lesdites sondes de Hall ayant été placées dans un champ magnétique c.c. (23). Les particules se déplacent selon une relation agissante avec les sondes de manière à créer un signal représentatif du nombre de particules présentes sur le substrat (22). L'invention porte également sur le procédé de détection et de mesure associé.
Black Randall C.
Diederichs Jost H.
Jensen Kurt G.
Sager Ronald E.
Simmonds Michael B.
Blake Cassels & Graydon Llp
Quantum Design Inc.
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