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X-ray Technique for Simultaneous Mass Flow Measurements and Foreign Body Detection in a Self-Propelled Forage Chopper

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2015 ASABE Annual International Meeting  152189703.(doi:10.13031/aim.20152189703)
Authors:   Karl J. Wild, Torsten Schmiedel, Sebastian Lautenschlager, Matthias Stein, John K. Schueller
Keywords:   Forage harvester, chopper, mass flow, yield, foreign objects, X-rays

Abstract. Accurate yield monitoring and detection of non-magnetic foreign objects are still unsolved problems for forage choppers. After static tests which demonstrated that X-rays could measure mass and also indicate the presence of foreign bodies, a dynamic test stand was designed, built, and used to simulate flows of grass and maize forage at speeds up to 3 m/s into a forage chopper X-ray sensing system. Tests of an X-ray sensing system with grass forage throughputs of 0.5 to 16.5 kg/s indicated that the X-ray system could accurately indicate the mass and was unaffected by a rotating feedroller. Further tests indicated that the system could detect ferromagnetic and nonmagnetic metals, stones, glasses, a plastic body, and a simulated animal carcass depending upon the particulars of the situation. Some safety issues of using X-rays are discussed. Successful further development and field tests would be necessary to generate a commercial product.

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