Estimation of Harvested Fruit Weight Using Volume Measurements with Distance Sensors: A Case Study with Olives in a Big Box

•Two Time-of-Flight technologies have been tested to develop a yield monitor.•Two algorithms have been developed for weight estimation by volume measurement.•Some factors such as illumination or acceleration affect the accuracy.•The developed systems are more stable than load cells under field conditions.•The systems developed are a valid alternative to weighing with load cells.