Absolute measuring length measuring system and method for its operation
AssigneeBalluff GmbH
InventorThomas Burkhardt
Life of this patent
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Abstract
In a length or position measuring system which has an at least locally substantially linear measuring gauge and at least one sensor able to be moved relative to the measuring gauge wherein the measuring gauge includes an incremental track and at least one absolute track and wherein the incremental track and the at least one absolute track have pole pairs arranged in the longitudinal direction of the measuring gauge, it is provided in particular that at least one pole pair of the absolute track is phase-shifted relative to a corresponding pole pair of the incremental track.
Claims9
A length or position measuring system, which has an at least locally substantially linear measuring gauge and at least one sensor head that is able to be moved relative to the measuring gauge and comprises at least one increment sensor and at least one absolute sensor,
- wherein the measuring gauge comprises an incremental track and at least one absolute track,
- wherein the incremental track and the at least one absolute track have pole pairs arranged in the longitudinal direction of the measuring gauge,
- wherein at least one pole pair of the at least one absolute track is arranged or formed phase-shifted relative to a corresponding pole pair of the incremental track, and
- wherein the transition values of the angle differences between two adjacent, different logical values are removed from the evaluation of the logical values.
A method for operating a length or position measuring system which has an at least locally substantially linear measuring gauge and at least one sensor head that is able to be moved relative to the measuring gauge and comprises at least one increment sensor and at least one absolute sensor,
- wherein the measuring gauge comprises an incremental track and at least one absolute track,
- wherein the incremental track and the at least one absolute track have pole pairs arranged in the longitudinal direction of the measuring gauge,
- wherein at least one pole pair of the at least one absolute track is arranged or formed phase-shifted relative to a corresponding pole pair of the incremental track,
- wherein m logical values are detected corresponding to respective angle differences and mn values are detected by n sensors,
- wherein the length or position measuring system has an increment sensor and at least two absolute sensors for each pole pair of the at least one absolute track,
- wherein the at least two absolute sensors are arranged offset to one another, wherein the increment sensor detects the position within a pole pair divided into several regions of the incremental track, and
- wherein, if the increment sensor is in one of the two other regions, the second of the at least two absolute sensors is provided for the evaluation.
A method for operating a length or position measuring system which has an at least locally substantially linear measuring gauge and at least one sensor head that is able to be moved relative to the measuring gauge and comprises at least one increment sensor and at least one absolute sensor,
- wherein the measuring gauge comprises an incremental track and at least one absolute track,
- wherein the incremental track and the at least one absolute track have pole pairs arranged in the longitudinal direction of the measuring gauge,
- wherein at least one pole pair of the at least one absolute track is arranged or formed phase-shifted relative to a corresponding pole pair of the incremental track,
- wherein m logical values are detected corresponding to respective angle differences and mn values are detected by n sensors, and
- wherein the courses of the angle differences between two adjacent, different logical values are removed from the evaluation of the logical values.
Dependencies are inferred from the claim text.