Digital disdrometer

Details Digital disdrometer Digital disdrometer

1981-03-26

1984-10-16

Chin, Gary

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Counting animate or inanimate entities

73432PS, G01N 2700

Patent

active

044779178

ABSTRACT:
A plurality of thin, conductive wires are stretched across the open center of a frame through which the liquid drops to be measured will fall. Adjacent wires are maintained at a potential difference with respect to each other so that when the wires are momentarily connected by a passing conductive drop, the potential of one rises while that for the other falls. The wires are connected to circuitry which detects the change in potential in each individual wire and stores an indication of such change for later use. By counting the number of adjacent wires whose potential has changed, and knowing the dimensions of the wires and the spacing between them, it is possible to calculate drop size to accuracies dependent upon the design dimensions chosen for the device.

REFERENCES:
patent: 2825872 (1958-07-01), Stubbs
patent: 2959348 (1960-11-01), Nassenstein
patent: 2997597 (1961-08-01), Mumma
patent: 3153727 (1964-10-01), Nathan
patent: 3714564 (1973-01-01), Reinnagel
patent: 3815024 (1974-06-01), Bean et al.
patent: 3836850 (1974-09-01), Coulter
patent: 3844174 (1974-02-01), Chabre
patent: 3982183 (1976-09-01), Collineau et al.
patent: 4205384 (1980-05-01), Merz et al.
"Digital Disdrometer" by Donnelly and Bulson, published at the Radar Meteorology Conference, Apr. 15-18, 1980.

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