Position detection device and position detection method
AssigneeSony Corporation
InventorTetsuya NARITA
Life of this patent
Estimating the term…
Abstract
There is provided a position detection device to suppress an influence of a signal distortion due to a processing error, an assembly error of a sensor, or the like. The position detection device includes: a waveform correction unit that corrects waveforms of a first signal and a second signal, the first signal being detected from a first track provided on a moving body and having a scale of predetermined cycles, and the second signal being detected from a second track provided on the moving body and having a scale of cycles less than the predetermined cycles; and a position calculation unit that calculates a position of the moving body on the basis of the corrected first signal and second signal.
Claims22
A position detection device comprising:
- a waveform correction unit that corrects waveforms of a first signal and a second signal, the first signal being detected from a first track provided on a moving body and having a scale of predetermined cycles, and the second signal being detected from a second track provided on the moving body and having a scale of cycles less than the predetermined cycles;
- and
- a position calculation unit that calculates a position of the moving body on a basis of the corrected first signal and second signal.
A position detection device comprising:
- a first interpolation angle calculation unit that calculates a first interpolation angle from a first signal detected from a first track provided on a moving body and having a scale of predetermined cycles;
- a second interpolation angle calculation unit that calculates a second interpolation angle from a second signal detected from a second track provided on the moving body and having a scale of cycles less than the predetermined cycles;
- a first position calculation unit that calculates a position of the moving body on a basis of the first interpolation angle and the second interpolation angle;
- an interpolation angle correction unit that corrects the first interpolation angle and the second interpolation angle on a basis of the position of the moving body;
- and
- a second position calculation unit that calculates a position of the moving body on a basis of the corrected first interpolation angle and second interpolation angle.
A position detection method comprising:
- correcting waveforms of a first signal and a second signal, the first signal being detected from a first track provided on a moving body and having a scale of predetermined cycles, and the second signal being detected from a second track provided on the moving body and having a scale of cycles less than the predetermined cycles;
- and
- calculating a position of the moving body on a basis of the corrected first signal and second signal.
A position detection method comprising:
- calculating a first interpolation angle from a first signal detected from a first track provided on a moving body and having a scale of predetermined cycles;
- calculating a second interpolation angle from a second signal detected from a second track provided on the moving body and having a scale of cycles less than the predetermined cycles;
- calculating a position of the moving body on a basis of the first interpolation angle and the second interpolation angle;
- correcting the first interpolation angle and the second interpolation angle on a basis of the position of the moving body;
- and
- calculating a position of the moving body on a basis of the corrected first interpolation angle and second interpolation angle.
Dependencies are inferred from the claim text.