Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1995-09-14
1997-12-02
Brock, Michael
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324655, 32420715, 273146, 273145R, G01S 500
Patent
active
056940459
ABSTRACT:
An object has a plurality of parts, wherein each part of the plurality of parts can face a predetermined direction. A plurality of resonant circuits are mounted in different predetermined positions of the object, and have different resonance frequencies. A sending unit sends signals having a plurality of frequencies corresponding to the resonance frequencies of the plurality of resonant circuits. A detecting unit detects resonance signals of the plurality of resonant circuits. A plate has therein the sending unit and detecting unit. A determining unit determines a part of the object placed on the plate, the part facing the predetermined direction, using differences of detected levels of the resonance signals of the plurality of resonant circuits of the object detected by the detecting unit.
REFERENCES:
patent: 2693962 (1954-11-01), Stevens
patent: 3683351 (1972-08-01), Wilcox
patent: 4909513 (1990-03-01), Kiyono
patent: 5291152 (1994-03-01), Seale
patent: 5519381 (1996-05-01), Marsh et al.
English Patent Abstract setting forth the relevant portions of the '770.
Ikeda Yuji
Yamamoto Takeshi
Brock Michael
Sega Enterproses, Ltd.
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