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US 6,543,149 B1Granted
Coordinate measuring system
AssigneeThe Regents of the University of California
InventorKeith Carlisle
Life of this patent
Estimating the term…
Abstract
An apparatus and method is utilized to measure relative rigid body motion between two bodies by measuring linear motion in the principal axis and linear motion in an orthogonal axis. From such measurements it is possible to obtain displacement, departure from straightness, and angular displacement from the principal axis of a rigid body.
Claims48
A system comprising:
- a first periodic measurement scale assembly substantially aligned with a first axis;
- and
- a first plurality of sensors positioned substantially proximate to said first periodic measurement scale assembly, said first plurality of sensors including a pair of sensors spaced from each other along the first axis and configured to cooperatively measure at least one of departure from straightness of a first effective point from the first axis and angular displacement of the first effective point from the first axis.
A measuring device comprising:
- a first scale assembly having a plurality of first periodic measurement scales substantially aligned with a first axis;
- and
- a first plurality of pairs of sensors positioned in substantial proximity to said first scale assembly, said first plurality of pairs of sensors including a first pair of sensors spaced from each other along the first axis and configured to cooperatively measure departure from straightness of a first effective point from the first axis.
A position measuring device comprising:
- a plurality of first periodic measurement scales substantially aligned with a first axis;
- and
- a first plurality of sensors positioned substantially proximate to said plurality of first periodic measurement scales, said first plurality of sensors including at least one sensor configured to measure linear displacement of a first effective point along the first axis, and a pair of sensors spaced from each other along the first axis and configured to cooperatively measure departure from straightness of the first effective point from the first axis, and angular displacement of the first effective point from the first axis.
A machine tool comprising:
- a first scale assembly having a first periodic measurement scale aligned with a first axis;
- and
- a firs plurality of sensors positioned in proximity to said first scale assembly, said first plurality of sensors including a pair of sensors spaced from each other along the first axis and configured to cooperatively measure at least one of departure from straightness of a first effective point from the first axis and angular displacement of the first effective point from the first axis.
A method comprising:
- measuring at least one of departure from straightness of a first effective point from a first axis and angular displacement of the first effective point from the first axis, by cooperatively utilizing a pair of sensors spaced from each other along the first axis and positioned substantially proximate a first scale assembly substantially aligned with said first axis.
A method of determining the position of a rigid body comprising:
- measuring linear displacement of a first effective point along a plurality of measurement scales substantially aligned along a first axis by cooperatively using a first pair of sensors positioned substantially proximate said plurality of measurement scales;
- and
- measuring at least one of departure from straightness of the first effective point from the first axis and angular displacement of the first effective point from the first axis, by cooperatively using a second pair of sensors spaced apart from each other along the first axis and positioned substantially proximate said plurality of measurement scales.
An apparatus comprising:
- means for measuring at least one of departure from straightness and angular displacement of a first effective point from a first axis by cooperatively using a pair of sensors spaced from each other along said first axis and positioned substantially proximate a first scale assembly substantially aligned with said first axis.
A measuring device comprising:
- means for measuring linear displacement of a first effective point along a plurality of measurement scales aligned along a first axis by using a first pair of sensors positioned substantially proximate said plurality of measurement scales;
- and
- means for measuring at least one of departure from straightness of the first effective point from the first axis and angular displacement of the first effective point from the first axis by cooperatively using a second pair of sensors positioned substantially proximate said plurality of measurement scales.
A system comprising:
- first means for measuring a position of a rigid body relative to a reference body;
- and
- second means for measuring a position of an object relative to the reference body, with said object configured to act upon said rigid body
- wherein said second means is configured to compensate for errors in the position of the rigid body relative to the object.
1 more element
A system comprising:
- a first scale assembly substantially aligned with a first axis;
- a second scale assembly substantially aligned with a second axis substantially orthogonal to the first axis;
- a first slide assembly having at least one sensor and designed to travel along and substantially proximate to said first scale assembly;
- a second slide assembly separate from the first slide assembly, and having at least one sensor and designed to travel along and substantially proximate to said second scale assembly;
- and
- a control system configured to utilize data from said at least one sensor on said second slide assembly to compensate for errors in the positioning of a first effective point on the first slide assembly.
3 more elements
A system comprising:
- a first scale assembly having a plurality of first periodic measurement scales substantially aligned with a first axis;
- a first plurality of pairs of sensors positioned substantially proximate to said first scale assembly said first plurality of pairs of sensors including at least one sensor configured to measure linear displacement of the first effective point along the first axis, and a pair of sensors spaced apart from each other and configured to cooperatively measure at least one of departure from straightness of a first effective point from the first axis and angular displacement of the first effective point from the first axis;
- a second scale assembly having a plurality of periodic measurement scales aligned with a second axis;
- a second plurality of pairs of sensors positioned substantially proximate to said second plurality of periodic measurement scales, said second plurality of pairs of sensors including at least one sensor configured to measure linear displacement of a second effective point along the second axis, and a pair of sensors spaced apart from each other and configured to cooperatively measure at least one of departure from straightness of the second effective point from the second axis, and angular displacement of the second effective point from the second axis;
- and
- wherein said second plurality of pairs of sensors are configured to compensate for errors in the positioning of a rigid body.
3 more elements
Dependencies are inferred from the claim text.