Conveyor with self propelled vehicles each having an on board co

Railways – Car-carried propulsion system – Electric

Patent

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Details

105 61, 246167D, B61L 2324

Patent

active

049552910

ABSTRACT:
A conveyor system (10) is disclosed comprised of a plurality of vehicles (12), propelled about a guide track (14) by a D.C. motor (54) and battery (52), featuring an on-board control (40) in which signals from fore and aft and side mounted photosensors (32,34,36,38) are processed by a microprocessor (42), to generate control signals for pulse width modulated control of the power to the D.C. motor (54). The control signals are applied to a motor driver circuit (50), including an H-bridge of MOSFET switching components (Q1,Q2 A ramping or progressive variation of the power applied to the motor (54) is carried out to provide gradual acceleration or deceleration, and the fore and aft photo-detectors (32,34) are triggered by the approach of another vehicle (12) at a substantial distance, to accommodate the distance required for gradual deceleration when the vehicles (12) are being queued at points along the track (14).

REFERENCES:
patent: 3365572 (1968-01-01), Strauss
patent: 3594572 (1971-07-01), Horeczky
patent: 3899041 (1975-08-01), Mager
patent: 4361202 (1982-11-01), Minovitch
patent: 4454454 (1984-06-01), Valentine
patent: 4523134 (1985-06-01), Kinoshita et al.
patent: 4554873 (1985-11-01), Rex
patent: 4649326 (1987-03-01), Mansmann et al.
patent: 4673851 (1987-06-01), Disser
patent: 4763052 (1988-08-01), Lundin et al.

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