Cloud cover sensor

Details Cloud cover sensor Cloud cover sensor

1980-06-27

1982-10-26

Arnold, Bruce Y.

Optics: measuring and testing

Photometers

Photoelectric

250203R, G01J 126, G01J 142

Patent

active

043558968

ABSTRACT:
An apparatus is described which provides a numerical indication of the cloudiness at a particular time of a day. The apparatus includes a frame (18) holding several light sensors such as photovoltaic cells, with a direct sensor (12) mounted to directly face the sun and indirect sensors (13-16) mounted to face different portions of the sky not containing the sun. A light shield (30) shields the direct sensor from most of the sky except a small portion containing the sun, and also shields each of the indirect sensors from direct sunlight. The relative values of the outputs from the direct and indirect sensors, enables the generation of a numerical indication (56) of the degree of cloudiness at a particular time of day.

REFERENCES:
patent: 4041307 (1977-08-01), Napoli et al.
patent: 4146784 (1979-03-01), Yekutieli
patent: 4225781 (1980-09-01), Hammons

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