Data processing: measuring – calibrating – or testing – Measurement system – Orientation or position
Reexamination Certificate
2006-03-28
2006-03-28
Bui, Bryan (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Orientation or position
C015S049100, C015S098000
Reexamination Certificate
active
07020576
ABSTRACT:
A control system for estimating the approximate relative position of an electric linear actuator on a surface maintenance machine. The control system includes device for selectively coupling the electric motor of the linear actuator to the electric power source, device for measuring or estimating the current and voltage of the electric motor, device for estimating the motor speed based on the measured values of current and voltage, and storage device for storing values of estimated motor speed and integrating device for determining approximate linear actuator position, wherein the integrating device integrates the motor speed over time to determine the approximate position of the linear actuator position.
REFERENCES:
patent: 5847530 (1998-12-01), Hill
patent: 6000084 (1999-12-01), Briscoe
patent: 6163915 (2000-12-01), Kaczmarz et al.
patent: 2004/0200017 (2004-10-01), Crane et al.
patent: 2004/0231947 (2004-11-01), Baehr
Alowonle Musibau O.
Bushey Bruce Phillip
Erko Robert J.
Groschen, Jr. Paul Leonard
Milun Richard F.
Bui Bryan
Fulbright & Jaworski L.L.P.
Pretlow Demetrius R.
Tennant Company
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