Radiation source detector and tracker control having a shade pol

Details Radiation source detector and tracker control having a shade pol Radiation source detector and tracker control having a shade pol

1993-04-30

1994-05-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

126577, G01J 120

Patent

active

053171454

ABSTRACT:
A tracker controller system in which a pair of photo-resistive cadmium sulfide sensors mounted in the shadow of a shade pole generate a voltage signal proportional to their resistive values which signal is delivered to a comparator circuit that causes a tracker driver to operate when the voltage signal falls outside of a voltage window established by the comparator circuit.

REFERENCES:
patent: 3229102 (1966-01-01), Spencer et al.
patent: 3370293 (1968-02-01), Green
patent: 3917942 (1975-11-01), McCoy
patent: 3996460 (1976-12-01), Smith
patent: 4082947 (1978-04-01), Haywood et al.
patent: 4179612 (1979-12-01), Smith
patent: 4225781 (1980-09-01), Hammons
patent: 4672101 (1987-06-01), Cofield

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