Electro-optical level detector

Details Electro-optical level detector Electro-optical level detector

1982-06-24

1985-06-18

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356 4, G01H 1506

Patent

active

045242828

ABSTRACT:
Level detection apparatus for determining the depth of a variable surface with respect to the apparatus is disclosed. The device includes a scanning source which causes an intense, collimated beam of light to move across the surface to be detected. First and second spaced detectors sensitive to light reflected from the surface are located at opposite sides of the scanning source and lie in the plane of the scanned beam so that the source directs light from the reflecting surface onto first one and then the other of the detectors. A circuit responsive to the receipt of the reflected beams by the first and second detectors produces first and second signals which will be spaced in time in accordance with the depth of the surface to be measured. An index signal is generated in synchronization with the rotation of the scanning source, and a comparator circuit is provided for comparing the time delay between the two detector outputs, whereby a level output signal proportional to the depth of the surface is produced.

REFERENCES:
patent: 3821558 (1974-06-01), Mansfield
patent: 3857031 (1974-12-01), Sinclair et al.
patent: 4053227 (1977-10-01), Bodlaj
patent: 4300836 (1981-11-01), Holmes et al.

Affiliated with

Also associated with

Rating

Electro-optical level detector 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 level detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electro-optical level detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-981458