Method for determining position with improved calibration

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United States of America Patent

PATENT NO 9745843
SERIAL NO

15178178

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Abstract

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The method and system for determining position with improved calibration allows a device to initiate activity at the proper location, such as navigating a drill bit through a rock formation. A position sensor having an oscillation element with a range of displacement in a set direction according to gravity generates a position data signal based on an amount of displacement in the set direction. A temperature sensor detects temperature and duration of the temperature. A plastic bias value is determined by a processor module based on the temperature data signal, the duration of the temperature, and the position data signal so as to account for bias and hysteresis errors. A position value is set according to the plastic bias value so that the position value is more accurate. The activity of the terminal device is initiated or maintained according to the position value calibrated by the plastic bias value.

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Patent Owner(s)

Patent OwnerAddress
NORALIS LIMITEDUNIT 6 MANOR FARM COURTYARD SOUTHAM LANE CHELTENHAM GLOS GL52 3PB

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Close, David Austin, US 8 93
Troy, George W Loomis, US 4 65

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