Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1976-04-05
1977-07-19
Rolinec, Rudolph V.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
250231R, 250233, G01P 336
Patent
active
040371573
ABSTRACT:
A speed transducer for measuring the speed of a moving surface comprises a light chopper for alternately completing and breaking the respective light paths between a light source and first and second photodetectors such that the second light path is completed before the first light path is broken. A pulse generator produces a pulse having a duration which is determined by the time interval between completion of the first and second light paths. A converter converts the pulse to a direct current signal proportional to the speed of the moving surface by generating a comparison pulse, the width of which is controllable by a direct current control signal, and comparing the widths of the generator and comparison pulses to produce an error signal which is indicative of the difference in widths. A control signal is generated in response to the error signal which constitutes the desired output when the compared pulse widths are equal. In a second embodiment, the sum of two pulses representing the speed of a rotating surface at two opposed locations is integrated to produce a direct current signal proportional to the concentric rotational speed only.
REFERENCES:
patent: 3654480 (1972-04-01), Stephenson
patent: 3685909 (1972-08-01), Schwartz
patent: 3819268 (1974-06-01), Johnson
patent: 3878375 (1975-04-01), Mickowski
Gardiner Donald A.
Rolinec Rudolph V.
Sadowsky Gersten
Sunderdick Vincent J.
The United States of America as represented by the Secretary of
LandOfFree
Electro-optical speed transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electro-optical speed transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electro-optical speed transducer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2295637