Absolute position detector for an apparatus for measuring linear

Details Absolute position detector for an apparatus for measuring linear Absolute position detector for an apparatus for measuring linear

1991-12-09

1993-08-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023114, 250237G, G01D 534

Patent

active

052351815

ABSTRACT:
The detector comprises an optoelectronic sensing unit (3) and a transparent rule (2) having two parallel graduation tracks (4, 5). One track (5) has incremental graduation of constant step and the other track (4) has pseudo-random graduation forming binary coding bits constituting a continuous sequence of words which are different from each other, the width of a bit being a function of the step of the incremental graduation. The incremental track (5) is read through a sensing graticule (9) by photodetectors (8) which are 90 electrical degrees out of phase in order to permit an interpolation in the step of said track. The track (4) with pseudo-random graduation is read by a CCD detector (11) through an image-enlarging lens (13). The signals generated are processed by circuits (15a, 15b) which assure the combining of the information taken from the two tracks of the rule.

REFERENCES:
patent: 5063291 (1991-11-01), Buehring
patent: 5065017 (1991-11-01), Hoech
patent: 5068529 (1991-11-01), Ohno et al.

Affiliated with

Also associated with

Rating

Absolute position detector for an apparatus for measuring linear 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 position detector for an apparatus for measuring linear, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absolute position detector for an apparatus for measuring linear will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1727443