Patent ID: 9631957
Date: 2017-04-25
CPC Classifications: A61B,A61G,G01D

Claim:
1. A movement system for moving an object, the movement system comprising: a drive comprising a drive shaft; a mechanism that converts an alteration to a rotational angle of the drive shaft into an alteration to a position of the object; a rotational angle sensor operable to detect the alteration to the rotational angle; a reference sensor operable to emit a reference signal when the object enters a predetermined reference volume; a controller configured to communicate with the rotational angle sensor and the reference sensor, the controller being further configured to determine a total rotational angle from alterations to the rotational angle detected according to the reference signal and to activate the drive for rotating the drive shaft by a reference rotational angle determined as a function of a predetermined reference positional value and the total rotational angle; and a calibration sensor operable to emit a calibration signal when the object enters a predetermined calibration volume, wherein the controller is configured to store a current total rotational angle or a value derived therefrom when detecting the calibration signal as calibration information, and wherein the controller is configured to determine the reference rotational angle as a function of the calibration information.