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- W2037758841 abstract "Seed spacing uniformity is crucial to crops such as sugarbeets. Planter manufacturers, dealers, and sugarbeet growers are interested in how uniformly planters place seeds into the soil. The current laboratory method for testing planter accuracy uses a stationary planter unit to place seeds onto a grease belt, allowing visualization of the seed spacings. This method, however, is very difficult and time consuming. Automation of the test using photonics is desirable. A rectangular photogate block was designed with light emitting diodes (LEDs) opposite photo- transistors. Twenty-four pairs of LEDs and photo-transistors were connected to a digital I/O board on a personal computer to detect space and time between seeds. During laboratory testing of a planter unit, the photogate was positioned beneath the seed drop tube to simulate the bottom of a furrow. A program was developed to poll the twenty four digital channels and three counters so no seeds could go through the photogate without being detected. Planter ground speed was monitored through a magnetic switch. Histograms of seed spacing and relative location of seed passing through the photogate were provided for each test. The outputs conform with the requirements of International Organizations for Standardization 7256/1 - 1984." @default.
- W2037758841 created "2016-06-24" @default.
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- W2037758841 date "1995-01-06" @default.
- W2037758841 modified "2023-09-23" @default.
- W2037758841 title "<title>Photo-optical sensor system for rapid evaluation of planter seed spacing uniformity</title>" @default.
- W2037758841 doi "https://doi.org/10.1117/12.198885" @default.
- W2037758841 hasPublicationYear "1995" @default.
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