Fluid drop detection system

Details Fluid drop detection system Fluid drop detection system

1984-12-11

1987-07-14

LaRoche, Eugene R.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

604253, G01V 904

Patent

active

046804625

ABSTRACT:
A system detecting the presence of successive drops of fluid in a fluid path has a system input for connection to a photoelectric transducer so situated as to have a change in electrical output on the presence of a drop in the fluid drop path. The system includes an arrangement for storing a quantity related to the value of the photoelectric transducer output in the absence of a drop. The quantity stored can then be compared with the present value of the output of the photoelectric transducer, and in the event of a sufficient difference, an output may be provided. In a preferred embodiment, the output signal itself may be used to disconnect the storage system from receiving input information that pertains to the presence rather than the absence of a drop.

REFERENCES:
patent: 3563090 (1971-02-01), Deltour
patent: 4038982 (1977-08-01), Burke et al.
patent: 4105028 (1978-08-01), Sadlier et al.
patent: 4125779 (1978-11-01), Malinowski
patent: 4255791 (1980-09-01), Kompelien
patent: 4431425 (1984-02-01), Thompson et al.
patent: 4498901 (1985-02-01), Finch

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