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Sensordata Technologies, Inc.

Daniel A Tardiff

Chen Y Lee

Fred Bolle

Sherif S Gindy

An apparatus comprises a sensor, a plurality of strain gauges, and a multiplier circuit. The sensor generally comprises a strain member configured to deform according to a force applied thereto. The plurality of strain gauges may be bonded to the sensor and connected to form a Wheatstone bridge. The Wheatstone bridge is generally configured to generate a first output signal in response to an excitation voltage. The first output signal is generally proportional to the force applied to the sensor. The multiplier circuit is generally mounted within the sensor and coupled to the Wheatstone bridge. The multiplier circuit may be configured to generate a second output signal in response to the excitation voltage and the first output signal. The second output signal generally comprises a scaled version of the first output signal.

Effective gauge factor utilizing integrated millivolt amplifier for strain gauge applications

A method and apparatus for automatically switching a circuit to regulate artificial light in an area. The artificial light is turned on by a person entering the area and reflecting an ultrasonic wave pattern toward a receiver. The light is turned off by a person moving into contactless proximity of a capacitance comparison circuit which utilizes the capacitance of the human body as one of the circuit elements. The ultrasonic circuit operates at different levels of sensitivity, depending upon the existing available light in the area, such as during daylight hours. Optionally, a capacitance comparison circuit may be utilized for both turning on and turning off of the artificial light.

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Troy, MI, United States of America

Daniel A Tardiff