OPTICAL GRAIN EVALUATION DEVICE AND COMBINE HARVESTER PROVIDED WITH OPTICAL GRAIN EVALUATION DEVICE

摘要

The optical grain evaluation apparatus is the grain evaluation part which evaluates a grain based on the light projection part 58 which irradiates the light from a light source to grain, the light receiving part 59 which the light which permeate|transmitted the grain injects, and the information of the received light. (60), the area between the light source 50 and the light transmitting unit 59, and the area between the light receiving unit 59 and the grain evaluation unit 60 isolate, and directly from the light transmitting unit 58 to the light receiving unit 59 It is provided with the shielding part SH which prevents light from entering, and the area|region between the light source 50 and the light-transmitting part 58 and the area|region between the light-receiving part 59 and the grain evaluation part 60 cover the whole area. , consists of an air propagation region where light propagates through the air.