Measurement apparatus for the absolute determination of lengths and of angles
First Claim
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1. A measurement apparatus (10) for the absolute value determination of lengths or of angles, comprising:
- said apparatus having at least one reading head (14) and a physical scale (12) which has at least a partial section (18) with a connection (28) for another partial section (18) in a sequential arrangement, wherein the partial section (18) includes a control unit (30) for the active determination of the position of the reading head (14) proximal to the partial section (18) as well as a storage element (32) in which an own position information of the partial section (18) within the physical scale (12) can be stored,wherein the reading head (14) is configured to generate a respective measurement value for both partial sections (18c) at a transition (34) between two partial sections (18),and wherein the measurement apparatus (10) comprises means for deriving a correction value for the transition (34) from the difference of the two measurement values.
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Abstract
A measurement apparatus (10) for the absolute value determination of lengths or of angles, said apparatus having at least one reading head (14) and a physical scale (12) is provided, which has at least a partial section (18) with a connection (28) for another partial section (18) in a sequential arrangement. In this respect the partial section (18) includes a control unit (30) for the active determination of the position of the reading head (14) proximal to the partial section (18) as well as a storage element (32) in which an own position information of the partial section (18) within the physical scale (12) can be stored.
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Citations
18 Claims
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1. A measurement apparatus (10) for the absolute value determination of lengths or of angles, comprising:
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said apparatus having at least one reading head (14) and a physical scale (12) which has at least a partial section (18) with a connection (28) for another partial section (18) in a sequential arrangement, wherein the partial section (18) includes a control unit (30) for the active determination of the position of the reading head (14) proximal to the partial section (18) as well as a storage element (32) in which an own position information of the partial section (18) within the physical scale (12) can be stored, wherein the reading head (14) is configured to generate a respective measurement value for both partial sections (18c) at a transition (34) between two partial sections (18), and wherein the measurement apparatus (10) comprises means for deriving a correction value for the transition (34) from the difference of the two measurement values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for the absolute value determination of lengths or of angles having at least one reading head (14) and a physical scale (12) which is formed from a sequential arrangement of partial sections (18), wherein a partial section (18) actively measures the position of the reading head (14) proximal to the partial section (18), wherein the position of the partial section (18) within the sequential arrangement is determined by means of a position information stored in the partial section (18) and wherein the absolute value is determined from the position within the partial section (18) and the position of the partial section (18) within the sequential arrangement
wherein a respective measurement value for both partial sections (18) is generated when the reading head (14) is positioned at a transition (34) between two partial sections (18), and wherein a correction value for the transition (34) derives from the difference between the two measurement values.
Specification