Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1990-02-14
1991-11-19
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
180169, G05B 100
Patent
active
050668544
ABSTRACT:
There are provided a method of and an apparatus for guiding a self-steering or driverless vehicle along an optical guideway. The hitherto known systems, which relate to optical scanning of an optical guideway by means of a light beam and which only transmit the signals "light" and "dark" with respect to detection of the optical guideway, are liable to disturbances and result in a too coarse or non-sensitive control. Therefore, it is suggested to scan the optical guideway by means of light pulses emitted in a predetermined frequency by sensors, whereby the intensity of the reflected light generates by means of an electronic evaluation unit a signal for controlling a steering or guiding mechanism. It is suggested to scan the optical guideway as an analog value by means of individual sensors arranged in a row and further process the determined values as digital values.
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Neue Systeme zur Steuerung von Flurforderzeugen, Hartmut Jorich; in Technisch Rundschau, vol. 1/89; pp. 34 through 39, 1989.
Hausler Dominik
Meyer Urs
Oberhansli Rene F.
Nelms David C.
Rieter Machine Works Ltd.
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