Photo electronic direction of motion indicator

Details Photo electronic direction of motion indicator Photo electronic direction of motion indicator

1976-02-10

1978-01-24

Caldwell, Sr., John W.

Communications: electrical

Systems

Call station

250209, 250233, G01D 534

Patent

active

040706613

ABSTRACT:
Two, adjacent, but circumferentially displaced, photodetectors radially positioned exterior to a rotating body sense the changes in the intensity of light impinging on the detectors emanating from a defined source on the periphery of the rotating body. The sequentially changing outputs of the photodetectors are compared in a comparator circuit which provides a triangular wave shape output signal having either a sharp leading edge or a sharp trailing edge depending upon the sequence of activation of the photodetectors by the rotating light signal. The triangular wave is differentiated providing either positive going spike pulses or negative going spike pulses depending on whether the rotating body was moving clockwise or counterclockwise. The output of the differentiator is displayed on an oscilloscope to visually indicate by the presence of either positive or negative going spike pulses the direction of rotation of the rotating body.

REFERENCES:
patent: 2685082 (1954-07-01), Beman et al.
patent: 2788519 (1957-04-01), Caldwell
patent: 2944157 (1960-07-01), McAuslan et al.
patent: 3304434 (1967-02-01), Koster
patent: 3423597 (1969-01-01), Delp
patent: 3567945 (1971-03-01), Appleby
patent: 3912926 (1975-10-01), Coulbourn
patent: 3947682 (1976-03-01), Mumme

Affiliated with

Also associated with

Rating

Photo electronic direction of motion indicator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photo electronic direction of motion indicator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photo electronic direction of motion indicator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-490829