Multiple sensor capacitive measurement system

Details Multiple sensor capacitive measurement system Multiple sensor capacitive measurement system

1990-08-10

1992-01-07

Miller, Jr., George H.

Weighing scales

Self-positioning

Electrical current generating or modifying

361280, G01G 314, H01G 700

Patent

active

050782207

ABSTRACT:
An instrument includes multiple sensing elements of the variable-capacitance type. The sensing elements are placed by a switching network into a single capacitance sensing circuit, and those elements which are not active in the circuit at a given time are switched by another or the same switching network into a ground shunt. The switching is effected at a rate, in relation to the expected vibrational spectrum of the sensor system, to determine a set of readings which are essentially equivalent to a set of simultaneous capacitance measurements of the plural sensing element. A preferred system is a weight sensing system employing three or four load cells to support a scale platform.

REFERENCES:
patent: 4512431 (1985-04-01), Bloomfield
patent: 4679643 (1987-07-01), Bove
patent: 4917199 (1990-04-01), Loshbough
patent: 5006952 (1991-04-01), Thomas

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