LABORATORY TEST STAND FOR COMBINE GRAIN YIELD MONITORS

Abstract

A laboratory test stand was constructed to compare the accuracy of a yield monitor to an electronic scale. Theclean grain auger, clean grain elevator, and the grain bin filling auger from a combine were used to simulate the grain (corn)flow in the laboratory. Strong correlation was found between the yield monitor and the electronic scale with R 2= 0.99following the calibration of the yield monitor under laboratory conditions. Duration of each test run and the range of flowrates incorporated into the calibration procedure seemed to be significant factors in obtaining a good accuracy for the yieldmonitor. Longer runs and high grain flow rates enhanced the agreement between the electronic scale and the yield monitor.