Position-measuring device able to monitor deviations from a setpoint behavior and method for operating the position-measuring device
First Claim
1. A position-measuring device, comprising:
- a measuring standard;
an optical scanner unit adapted to scan the measuring standard for position-determination;
a rotary bearing, the measuring standard and the optical scanner unit being rotatable in relation to each other via the rotary bearing when the position-measuring device is in operation, the optical scanner unit adapted to generate output signals, on which an angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable; and
a monitor device adapted to monitor the rotary bearing for occurrence of bearing faults by detection and analysis of (a) an amplitude of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, and/or (b) a phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, at each of a plurality of different, specific relative positions of the measuring standard in relation to a detector device of the optical scanner unit during a revolution, by comparing (a) the amplitude of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, and/or (b) the phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, at each of the specific relative positions to a respective setpoint value for each specific relative position, the monitor device adapted to determine a bearing fault based on the detection, analysis, and comparison;
wherein (a) the amplitude of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, and/or (b) the phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, constitutes a measured variable.
1 Assignment
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Accused Products
Abstract
A position-measuring device includes a measuring standard, a scanning unit, and a rotary bearing by which the measuring standard or the scanning unit is rotationally mounted. The measuring standard and the scanning unit are rotatable in relation to each other. The scanning unit generates output signals, on the basis of which a rotary angle associated with the relative motion of the measuring standard and the scanning unit is able to be determined. A monitoring device monitors the rotary bearing for the occurrence of bearing faults and is adapted to detect and analyze at least one measured variable for a plurality of different relative positions of the measuring standard in relation to the scanning unit, in order to determine deviations from a setpoint behavior of the measured variables on the basis of the measured variable detected for a plurality of relative positions.
16 Citations
25 Claims
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1. A position-measuring device, comprising:
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a measuring standard; an optical scanner unit adapted to scan the measuring standard for position-determination; a rotary bearing, the measuring standard and the optical scanner unit being rotatable in relation to each other via the rotary bearing when the position-measuring device is in operation, the optical scanner unit adapted to generate output signals, on which an angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable; and a monitor device adapted to monitor the rotary bearing for occurrence of bearing faults by detection and analysis of (a) an amplitude of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, and/or (b) a phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, at each of a plurality of different, specific relative positions of the measuring standard in relation to a detector device of the optical scanner unit during a revolution, by comparing (a) the amplitude of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, and/or (b) the phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, at each of the specific relative positions to a respective setpoint value for each specific relative position, the monitor device adapted to determine a bearing fault based on the detection, analysis, and comparison; wherein (a) the amplitude of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, and/or (b) the phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, constitutes a measured variable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 16, 18, 19)
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11. A method for operating a position-measuring device, comprising:
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scanning a measuring standard by an optical scanner unit for a position measurement while the measuring standard and the optical scanner unit are rotated with respect to each other by a rotary bearing; checking the rotary bearing for bearing faults by a monitor device while the position-measuring device is in operation; detecting and analyzing, by the monitor device, (a) an amplitude of output signals of the optical scanner unit, on which an angle of rotation associated with relative movement of the measuring standard and the optical scanner unit is determinable, and/or (b) a phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, at each of a plurality of different, specific relative positions of the measuring standard in relation to a detection device of the optical scanner unit during a revolution, by comparing (a) the amplitude of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, and/or (b) the phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, at each of the specific relative positions to a respective setpoint value for each specific relative position; and determining a bearing fault based on the detecting, analyzing, and comparing; wherein (a) the amplitude of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, and/or (b) the phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, constitutes a measured variable. - View Dependent Claims (12, 13, 15, 17, 20, 21)
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22. A position-measuring device, comprising:
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a measuring standard; an optical scanner unit adapted to scan the measuring standard for position-determination; a rotary bearing, the measuring standard and the optical scanner unit being rotatable in relation to each other via the rotary bearing when the position-measuring device is in operation, the optical scanner unit adapted to generate output signals, on which an angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable; and a monitor device adapted to monitor the rotary bearing for occurrence of bearing faults by detection and analysis of at least a phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, at each of a plurality of different, specific relative positions of the measuring standard in relation to a detector device of the optical scanner unit during a revolution, by comparing the phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, at each of the specific relative positions to a respective setpoint value for each specific relative position, the monitor device adapted to determine a bearing fault based on the detection, analysis, and comparison. - View Dependent Claims (23)
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24. A method for operating a position-measuring device, comprising:
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scanning a measuring standard by an optical scanner unit for a position measurement while the measuring standard and the optical scanner unit are rotated with respect to each other by a rotary bearing; checking the rotary bearing for bearing faults by a monitor device while the position-measuring device is in operation; detecting and analyzing, by the monitor device, at least a phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, at each of a plurality of different, specific relative positions of the measuring standard in relation to a detection device of the optical scanner unit during a revolution, by comparing the phase of the output signals of the optical scanner unit, on which the angle of rotation associated with the relative movement of the measuring standard and the optical scanner unit is determinable, at each of the specific relative positions to a respective setpoint value for each specific relative position; and determining a bearing fault based on the detecting, analyzing, and comparing. - View Dependent Claims (25)
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Specification