Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1978-02-03
1980-07-08
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
180169, G06K 1102
Patent
active
042119219
ABSTRACT:
A sensor for use in controlling the operation of a mobile farming machine which has an image taking means carried by the machine and adapted to take the image of a part of the field to be worked, and photoelectric converting means adapted to convert the image into electric signal. The photoelectric converting means consist of a plurality of photoelectric elements disposed in a row crossing the line of movement of the machine, so that the states of the photoelectric elements are changed as the position of a boundary involved by the image taken by the image taking means is moved. Thus, the deviation of the machine from the correct course is detected through the change of states of the photoelectric elements. The image is optically compressed in the direction of movement of the machine, or the output from the photoelectric means is electrically compressed in that direction, so that the final controlling signal is integrated in the direction of movement of the machine, so as to ensure an accurate detection of the boundary.
REFERENCES:
patent: 3718821 (1973-02-01), Vischulis
Kanetou Yuuji
Uetani Hirofumi
Fattibene Arthur T.
Hostetter Darwin R.
Iseki Agricultural Machinery Mfg. Co. Ltd.
Nelms David C.
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