Coded data generation or conversion – Digital pattern reading type converter – Optical
Patent
1997-02-05
1998-10-20
Gaffin, Jeffrey A.
Coded data generation or conversion
Digital pattern reading type converter
Optical
341 2, 341 9, 341 11, H03M 122
Patent
active
058253076
ABSTRACT:
An absolute linear encoder includes an index channel and at least two counter channels. The spacing between markings on the index channel is constant, and the spacing between markings on the first and second channels is predetermined so that the positions of the markings in the first and second channels vary so as to provide a unique signature for each position along the encoder. The linear encoder includes quadrature channels to provide increased resolution and to determine the direction of translation. The encoder is provided with a detector unit to detect positions of the markings in each channel, and a processing unit to calculate an absolute position from the detected marking positions. A method of producing the absolute linear encoder includes selecting spacings for markers in the quadrature, index, first and second channels in order to provide a desired resolution and encoder length.
REFERENCES:
patent: 4524347 (1985-06-01), Rogers
patent: 4794251 (1988-12-01), Scholian
patent: 4901073 (1990-02-01), Kirbrick
patent: 4914437 (1990-04-01), Kirbrick et al.
patent: 5027526 (1991-07-01), Crane
patent: 5127035 (1992-06-01), Ishii
patent: 5336884 (1994-08-01), Khoshnevisan et al.
patent: 5418362 (1995-05-01), Lusby et al.
patent: 5438193 (1995-08-01), Takagi et al.
patent: 5438330 (1995-08-01), Yamazaki et al.
patent: 5451776 (1995-09-01), Kolloff et al.
patent: 5563408 (1996-10-01), Matsumoto et al.
Meyer Paul R.
Titus John
Gaffin Jeffrey A.
Huynh Kim N.
Perception Incorporated
LandOfFree
Absolute linear encoder and method of production utilizing index does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Absolute linear encoder and method of production utilizing index, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absolute linear encoder and method of production utilizing index will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-249126