Degree Type

Thesis

Date of Award

2012

Degree Name

Master of Science

Department

Agricultural and Biosystems Engineering

First Advisor

Stuart J. Birrell

Abstract

To facilitate "unloading on-the-go", a sensor package mounted to a combine harvester to allow for automatic unloading auger control was desired. A rotating array of four ultrasonic sensors was chosen over cameras because of dusty operating conditions and poor lighting. Static testing was done with the ultrasonic sensor package mounted on the combine harvester unloading auger viewing a wagon load of corn. A feature extraction process was devised which correctly segmented and identified wagon edges from the grain contained in the wagon. Once features were identified, a second order polynomial surface was fitted to the grain to extrapolate the grain surface. The grain fill level was then calculated. With this information, the unloading auger could be automatically turned off and its swing could be automatically controlled to avoid wagon edges and to fill the wagon evenly with grain.

DOI

https://doi.org/10.31274/etd-180810-1941

Copyright Owner

John David Gaard

Language

en

File Format

application/pdf

File Size

119 pages

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