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US 7,689,380 B2Granted
Device and method for sensing a position of a drive unit
AssigneeSiemens Aktiengesellschaft
InventorsUwe Krause, Heinz Ludwig, Uwe Nolte, Guido Sonntag
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Abstract
The invention relates to a device and a method for sensing a position of a drive unit, in which the position can be sensed by an incremental signal transmitter having a first degree of accuracy which is described by a first travel increment or angle increment, and can be fed to a converter by which the first degree of accuracy of the sensing of the position can be reduced to a second degree of accuracy which is described by a second travel increment or angle increment.
Claims19
A device for sensing a position of a drive unit, comprising:
- an incremental signal transmitter for sensing the position of the drive unit having a first degree of accuracy that is described by a first travel increment or angle increment;
- and
- a converter that receives the first degree of accuracy of the sensing of the position and reduces a second degree of accuracy described by a second travel increment or angle increment,
- wherein signals that represent the respectively predefined first travel increment or angle increment sensed by the incremental signal transmitter is output by the incremental signal transmitter on a first and second incremental signal transmitter channel,
- wherein signals of the second incremental signal transmitter have, compared to the signals of the first incremental signal transmitter channel given an identical waveform, a phase shift whose phase angle is positive in the case of a first direction or rotational sense of the incremental signal transmitter and negative in the case of a second, opposed direction or rotational sense of the incremental signal transmitter,
- wherein the converter is connected downstream of the incremental signal transmitter, and the signals of the incremental signal transmitter channels are fed to the converter and signals which represent the second travel increment or angle increment which is a predefined integral multiple of the travel increment or angle increment are output on a first and second converter channel by the converter,
- wherein the phase shift between the first and second converter channels correspond to the phase shift between the first and second incremental signal transmitter channels.
4 more elements
A method for sensing a position of a drive unit, comprising:
- sensing a predefined travel increment or angle increment by an incremental signal transmitter;
- and
- outputting on a first and a second incremental signal transmitter channel a sensed travel increment or angle increment signal by the incremental signal transmitter as a function of the position or a change in position of a door,
- wherein the signals of the second incremental signal transmitter have, compared to the signals of the first incremental signal transmitter channel given an identical waveform, a phase shift whose phase angle is positive in the case of a first direction or rotational sense of the incremental signal transmitter and negative in the case of a second, opposed direction or rotational sense of the incremental signal transmitter,
- wherein a converter is connected downstream of the incremental signal transmitter, and the signals of the incremental signal transmitter channels are fed to the converter and signals that represent a second travel increment or angle increment which is a predefined integral multiple of the travel increment or angle increment are output on a first and second converter channel by the converter,
- wherein the phase shift between the first and second converter channels correspond to the phase shift between the first and second incremental signal transmitter channels.
3 more elements
Dependencies are inferred from the claim text.