Sun tracking system

Details Sun tracking system Sun tracking system

1977-08-22

1980-02-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

G01J 120

Patent

active

041907663

ABSTRACT:
A sun tracking system having at least one photo-sensor for each tracking axis, wherein a small inclined mirror, blackened except for a small reflective aperture, reflects a spot of light on a predetermined surface fixed with respect to the mirror. The position of the spot on the surface is in accordance with the relative alignment of the mirror to the sun. A photo-sensor associated with a given axis is disposed on the surface at a position corresponding to the desired alignment of the device to the sun. A further photo-sensitive device can be disposed in close proximity to the first photo-sensor to effect positive activation of a motor to correct misalignment, illumination of the first photo-sensor inhibiting the motor and for compensating for changes in ambient light. A simple transistor-relay circuit for effecting correction of alignment is also disclosed.

REFERENCES:
patent: 3346738 (1967-10-01), Rogers et al.

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