Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1988-11-23
1990-05-15
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
356216, G01J 132
Patent
active
049260375
ABSTRACT:
A motor position controller energized by radiant energy, includes a member that rotates in response to radiant energy. A sensing means is mounted adjacent the absorbing member to sense rotational movement of the member and to generate a member rotational speed and direction movement signal in response thereto. A processor compares input command signals representing the desired member speed and rotational direction signal with the actual speed and rotational direction signal and generates a radiant energy control signal in response thereto. A radiant energy generating laser, controlled by the processor, transmits radiant light energy of varying magnitude onto the member thereby controlling the member's rotational speed, direction and position. In a preferred embodiment, the member is mechanically engaged to a mechanical joint and is used to control the arm's speed, position and movement.
REFERENCES:
patent: 182172 (1876-09-01), Crookes
patent: 1000831 (1911-08-01), Martin
patent: 4397150 (1983-08-01), Paller
patent: 4410805 (1983-10-01), Berley
patent: 4431306 (1984-02-01), Estey et al.
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