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Cubic Automatic Reveneu Collection Group

Kevin R Baker

Kent E Erickson

Jeffrey S Brumfield

Claiborne M Key

A coin sensor utilizes time-multiplexing of LC oscillators having natural frequencies F A, F B, F , and F to produce magnetic fields in three sets of windings. As a coin passes through the coin sensor, the LC oscillators are separately enabled in a sequence to produce a frequency profile for each set of windings. A first winding produces a frequency profile for the facial area of a coin, a second winding produces a frequency profile for a cross-sectional area of a the coin, and a third winding produces a frequency profile for further distinguishing the relative size of a coin. A microcontroller identifies signature points from the frequency profiles and compares the signature points with stored signatures for a multitude of coins and/or tokens.

Inductive coin sensor with position correction

A laser distance measuring device includes a semiconductor source, such as a laser diode, that produces a laser beam, preferably in the visible range. A driver selectively drives the semiconductor source at a minimum of two different driving frequencies. A laser beam receiver has a detector that produces an output signal which varies with the intensity of the received laser beam, an amplifier that amplifies the output signal of the detector, and counter means for controllably counting the number of cycles in a clock signal. A beam director selectively directs the laser beam toward an object and receives the reflected laser beam from the object, and directs the laser beam toward the receiver without traveling to the object. A microprocessor controls the driver, the counter, and the beam director.

Growing community of inventors

Murfreesboro, TN, United States of America

Kevin R Baker