Development of a Device for Preventing Entanglement Accidents in Head-feeding Combine Harvesters （Part 1）

—Investigation of Discrimination Method and Prototype Components—

Abstract

We have developed a new technology to prevent accidents involving hand-fed threshing, which is one of the most typical accidents associated with a head-feeding combine harvester. Based on a survey of existing technologies, a glove with a magnet attached to it was worn by the operator, and the glove was detected by a metal sensor or a magnetic sensor installed in the hand-threshing section of the combine harvester. The magnetic core coil was installed on a two-row combine harvester, and a method for noise reduction in the detection signal due to the movement of metal parts around the coil, as well another to determine the detection threshold, were proposed. The specifications of the magnet were also examined.