Abstract
Variability of grain yield in a paddy field was measured while harvesting rice using a combine with a grain flow sensor. However, since the measurement accumulates errors, it is difficult to determine the whole grain yield in the field. Therefore, a mass sensing equipment has been developed in order to measure the mass of container loading on a vehicle. It consists of three load cells and two inclination sensors. The equipment can sense the inclination of vehicle and the mass of container. Field tests showed that the equipment could measure the mass of grain at the accuracy of ±9kg in the case of less than 2° inclination of vehicle.
