Circuit for detecting a droplet in motion and method therefor

Details Circuit for detecting a droplet in motion and method therefor Circuit for detecting a droplet in motion and method therefor

1993-12-23

1994-10-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502082, 250577, G01V 904

Patent

active

053528875

ABSTRACT:
A circuit for detecting a substance in motion. A light source (11) emits light which is received by a first photodetector (16) and a second photodetector (18). Each of the photodetectors (16) and (18) receives substantially equal light intensities from the light source (11). The first photodetector (16) generates a first output voltage (17) which corresponds to light intensity. The second photodetector (18) generates a second output voltage (19) which corresponds to light intensity. A differential amplifier (21) has a first input coupled to the first output voltage (17) and a second input coupled to the second output voltage (19). A moving substance (13) passing between the light source (11) and the first (16) or second (18) photodetectors generates a differential voltage which is amplified by the differential amplifier (21).

REFERENCES:
patent: 3718822 (1973-02-01), Pascoe
patent: 3751154 (1973-08-01), Frazee et al.
patent: 3809910 (1974-05-01), Nellis
patent: 3812348 (1974-05-01), Lippke
patent: 3907429 (1975-09-01), Kuhn et al.
patent: 4023599 (1977-05-01), Zekny
patent: 4449191 (1984-05-01), Mehnert
patent: 4510504 (1985-04-01), Tamai et al.
patent: 4574238 (1986-03-01), Weinlich
patent: 4577197 (1986-03-01), Crean et al.
patent: 4675519 (1987-06-01), Price
patent: 4812635 (1989-03-01), Kaufmann et al.
patent: 4812643 (1989-03-01), Talbot
patent: 4900913 (1990-02-01), Muro
patent: 4926049 (1990-05-01), Nakamura et al.
patent: 5166741 (1992-11-01), Gempe et al.

Affiliated with

Also associated with

Rating

Circuit for detecting a droplet in motion and method therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit for detecting a droplet in motion and method therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit for detecting a droplet in motion and method therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-583142