Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-08-13
1991-11-19
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25023117, G01D 534
Patent
active
050668579
ABSTRACT:
An incremental angle encoder of the invention has an encoder shaft connected with a first disk having an incremental angular graduation and a first and a second reference mark. A second disk is connected to this first disk via a reduction gear, on which a spiral-shaped reference scanning field is provided. A first scanning unit scans the incremental angular graduation to generate two scanning signals and the first reference mark to generate a first reference signal. A second scanning unit scans the second reference mark utilizing the spiral-shaped reference scanning field to generate a second reference signal. A specific offset, which indicates the number of revolutions of the encoder shaft, exists between the first reference signal and the second reference signal because of the spiral-shaped reference scanning field. An absolute angular measurement value for the encoder shaft is determined from the scanning signals and from the specific offset for the number of revolutions.
REFERENCES:
patent: 3525094 (1970-08-01), Leonard
patent: 3693024 (1972-09-01), Hulle et al.
patent: 4841297 (1989-06-01), Bourgeaux et al.
Johannes Heidenheim GmbH
Nelms David C.
Shami K.
LandOfFree
Incremental angle encoder having spiral scanning field and multi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Incremental angle encoder having spiral scanning field and multi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Incremental angle encoder having spiral scanning field and multi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1372084