Sensor for a rotatable element

A sensor unit (10) is mountable on a rotatable element (5) on a platform (3) that is itself movable, and comprises an orientation sensor arranged to take measurements that are dependent on the orientation of the sensor unit, a processor arranged to derive a rotational position signal representing th...

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Bibliographische Detailangaben
Hauptverfasser:	Newton, John Mark, Davis, Mathew William, Larkins, Andrew Henry John, Finlay, Alan Patrick John, Nicholls, Grant
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GYROSCOPIC INSTRUMENTS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS MECHANICAL ENGINEERING MINING NAVIGATION OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING SURVEYING TESTING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A sensor unit (10) is mountable on a rotatable element (5) on a platform (3) that is itself movable, and comprises an orientation sensor arranged to take measurements that are dependent on the orientation of the sensor unit, a processor arranged to derive a rotational position signal representing the orientation of the rotatable element from the measurements, and a buffer arranged to buffer a series of recent measurements taken by the orientation sensor over a predetermined period of time. The processor derives the rotational position signal making a correction to compensate for the effect of the motion of the platform on the measurements on the basis of the overall series of measurements buffered in the buffer.