Capacitive gauging system

Details Capacitive gauging system Capacitive gauging system

G - Physics

01

B

354/25

G01B 7/287 (2006.01) G01B 7/02 (2006.01)

Patent

CA 1138113

Abstract of the Disclosure A capacitive gauging apparatus in which a single central processing unit is connected to a plurality of gauging heads each gauging head having a further plurality of gauging probes. The system then multiplexes the probes and heads to enable the central processing unit to receive serially the output from each of the heads and produce and analog or digital signal which indicates distance between each of the probes and the work piece. A central microprocessor transforms these signals into an output for visual display or calculates the difference between these signals and ideal master work piece. Further, a highly temperature stable, low capacitance, high impedance amplifier is used in conjuction with each of the probes so that the output signal from each of the probes is stable and accurate over a wide range of conditions.

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