Seedling detector and ferret

Details Seedling detector and ferret Seedling detector and ferret

1984-06-22

1986-08-26

Hafer, Robert A.

Plant husbandry

Algae culture

A01C 100

Patent

active

046074520

ABSTRACT:
A device for detecting a seedling. A row of detectors determine the presence or absence of a seedling at positions in a two dimensional grid, one row at a time. A comb has teeth spaced to fit between rows of the seedlings. Each tooth carries a light source on one side and a light detector on the other. Each light detector receives light from the light source on the adjacent tooth. When a seedling is present, the light is interrupted. A memory stores the position of the present seedlings so that cells having no seedlings may be removed.

REFERENCES:
patent: 3436540 (1969-04-01), Lamorlette
patent: 3530372 (1970-09-01), Laukien
patent: 3852914 (1974-12-01), Levengood
patent: 4166948 (1979-09-01), Steffen
patent: 4206569 (1980-06-01), Randolph
patent: 4262806 (1981-04-01), Drabs
patent: 4266674 (1981-05-01), Bell et al.
patent: 4279328 (1981-07-01), Ahlbom
patent: 4408295 (1983-10-01), Kavage et al.
patent: 4408414 (1983-10-01), Lehle et al.

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