Position measuring system comprising at least two scanning units

Details Position measuring system comprising at least two scanning units Position measuring system comprising at least two scanning units

1985-03-27

1987-05-19

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340347P, 356395, 250237G, G01B 2100, G01B 2122

Patent

active

046670963

ABSTRACT:
A position measuring system for measuring the relative position of two objects movable with respect to one another includes a housing which rotatably supports a shaft connected with the first object. A first graduation disk with a first incremental graduation and at least one absolutely positioned first reference mark is mounted to rotate with the shaft. A first scanning unit for the scanning of the first incremental graduation and the first reference mark is rotatably mounted on the shaft to rotate relative to the first graduation disk and the housing. A second graduation disk is firmly connected to the first scanning unit. The second graduation disk defines a second incremental graduation and at least one absolutely positioned second reference mark. A second scanning unit is fixedly mounted to the housing which is connected to the second object. In order to reproduce a reference position after an interrupted measurement operation and unknown movement of the relative position of the two objects, the first scanning unit is rotatable together with the second graduation disk for the scanning of the first reference mark of the first graduation disk and for the scanning of the second reference mark of the second graduation disk. The distance between the two reference marks is counted in a differential counter.

REFERENCES:
patent: 3702471 (1972-11-01), Kennedy et al.
patent: 4449191 (1984-05-01), Mehnert

Affiliated with

Also associated with

Rating

Position measuring system comprising at least two scanning units does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Position measuring system comprising at least two scanning units, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Position measuring system comprising at least two scanning units will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1566460