Fluid drop detection and discrimination system

Details Fluid drop detection and discrimination system Fluid drop detection and discrimination system

1987-07-13

1988-11-22

LaRoche, Eugene R.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

604253, G01V 904

Patent

active

047868007

ABSTRACT:
A system and method is provided for detecting the presence of drops in a fluid drop path, such as that in a medical infusion system, and for discriminating between signals resulting from true drops and signals resulting from aberrant fluid flow. A transducer generates a drop signal related to the presence of a drop in a fluid drop path. Also generated is a reference quantity related to the value of the drop signal in the absence of a drop. The deviation of the drop signal from the reference quantity is calculated, and is compared with first and second threshold values. The results of these two comparisons are then used to determined the presence or absence of a true drop.

REFERENCES:
patent: 4498901 (1985-02-01), Finch
patent: 4680462 (1987-07-01), Kamen

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