Fiber optics proportional control system
US4087684A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 1977 |
| Grant date | May 2, 1978 |
| Priority date | — |
| Expiry date | Jan 31, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/2456
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A fiber optic feedback control system for controlling a motor having an output for driving a condition controlling device, is disclosed which comprises a fiber optic having a first flared end, a light source for supplying light to the first flared end, a shadow mask between the light source and the first flared end having a position dependent upon the output of the motor, a second flared end for supplying light to a pair of photocells under the control of a condition responsive element and means for connecting the photocells to the motor whereby, upon movement of the condition responsive device, one of the photocells receives light from the second flared end of the fiber optic to energize the motor in a specific direction which repositions the shadow mask between the light source and the first flared end to block out light supplied to the photocells, the resulting position of the output of the motor being proportional to the movement of the condition responsive element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.