Method for calibrating a measuring device
First Claim
1. Method for calibrating a measuring device (10), the method comprising:
- moving, with finite accuracy and thus with positioning error, a reference object to at least three measuring positions located in a testing volume (24) of the measuring device and distinguishable by spatial and/or angular coordinates,generating measurement signals at the respective measuring positions, anddetermining parameters of a mathematical model of the measuring device from the measurement signals and the spatial and/or angular coordinates, including deriving a coordinate system, to which coordinates of points of the testing volume relate, from the measuring positions moved to with error by associating predetermined coordinate values with exactly six coordinates of at least three of the measuring positions,wherein the associating predetermined coordinate values comprises;
assigning a first set of three predetermined coordinate values (0/0/0) to a first measuring position of the at least three measuring positions and defining error caused by moving with error into the first measuring position to zero by a first set of three secondary conditions (N1, N2, N3) within an equation system characterizing the measuring device,assigning a second set of three predetermined coordinate values (0/0/1) to a second measuring position of the at least three measuring positions and defining error caused by moving with error into the second measuring position to zero by a second set of two additional secondary conditions (N4, N5) in the equation system, andassigning a third set of three predetermined coordinate values (1/0/0) to a third measuring position of the at least three measuring positions and defining error caused by moving with error into the third measuring position to zero by a third set of one secondary condition (N6) in the equation system.
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Abstract
The invention relates to a method for calibrating a measuring device, comprising the following steps: moving, with finite accuracy and thus with positioning error, to various points that lie in a testing volume of the measuring device and that can be characterized by spatial and/or angular coordinates, generating measurement signals at the respective points, and determining parameters of a computing model of the measuring device from the measurement signals and the spatial and/or angular coordinates. The method is characterized in that a coordinate system to which the coordinates of the points of the testing volume relate is defined from points moved to with error, by associating predetermined coordinate values with exactly six coordinates of three points.
10 Citations
22 Claims
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1. Method for calibrating a measuring device (10), the method comprising:
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moving, with finite accuracy and thus with positioning error, a reference object to at least three measuring positions located in a testing volume (24) of the measuring device and distinguishable by spatial and/or angular coordinates, generating measurement signals at the respective measuring positions, and determining parameters of a mathematical model of the measuring device from the measurement signals and the spatial and/or angular coordinates, including deriving a coordinate system, to which coordinates of points of the testing volume relate, from the measuring positions moved to with error by associating predetermined coordinate values with exactly six coordinates of at least three of the measuring positions, wherein the associating predetermined coordinate values comprises; assigning a first set of three predetermined coordinate values (0/0/0) to a first measuring position of the at least three measuring positions and defining error caused by moving with error into the first measuring position to zero by a first set of three secondary conditions (N1, N2, N3) within an equation system characterizing the measuring device, assigning a second set of three predetermined coordinate values (0/0/1) to a second measuring position of the at least three measuring positions and defining error caused by moving with error into the second measuring position to zero by a second set of two additional secondary conditions (N4, N5) in the equation system, and assigning a third set of three predetermined coordinate values (1/0/0) to a third measuring position of the at least three measuring positions and defining error caused by moving with error into the third measuring position to zero by a third set of one secondary condition (N6) in the equation system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification