Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1989-08-11
1990-10-16
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250577, 356375, G01N 2186
Patent
active
049637312
ABSTRACT:
To provide rapid level measurements with improved reliability, the present invention provides an apparatus and method for optically determining the level of a material through a technique for measuring the ratio of digital signals acumulated during an index interval and for modifying those signals to compensate for variations that can be caused by the shape of the beam detector signal. More particularly, the present invention provides a level detector system which includes a laser beam source which directs light to be reflected from a surface to be measured, the reflected light being directed to a stationary parabolic mirror.
REFERENCES:
patent: 1706857 (1929-03-01), Mathe
patent: 3625618 (1971-12-01), Bickel
patent: 3667849 (1972-06-01), Nater et al.
patent: 3741656 (1973-06-01), Shapiro
patent: 3744915 (1973-07-01), Sick
patent: 3821558 (1974-06-01), Mansfield
patent: 3905705 (1975-09-01), Petrohilos
patent: 3994586 (1976-11-01), Sharkins et al.
patent: 4053227 (1977-10-01), Bodlaj
patent: 4201476 (1980-05-01), Musto et al.
patent: 4245517 (1981-01-01), Barker
patent: 4300836 (1981-11-01), Holmes
patent: 4425760 (1984-01-01), Furuta
patent: 4461576 (1984-07-01), King
patent: 4508970 (1985-04-01), Ackerman
patent: 4524282 (1985-06-01), King
patent: 4585343 (1986-04-01), Schave et al.
patent: 4774403 (1988-09-01), Arts
patent: 4864123 (1989-09-01), Mizutani et al.
Allen Stephone B.
Courser Incorporated
Nelms David C.
LandOfFree
Optical level measurement system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical level measurement system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical level measurement system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-851086