Plants population density detecting device for use in harvester, has evaluation device determining population density of plants based on variation of duration of electromagnetic wave from transmitter to receiver in measurement direction

摘要

The device has a transmitter for emitting an electromagnetic wave e.g. laser beam, on plant population, and a receiver for receiving a reflected wave from plants of the plant population and/or from a land. An evaluation device (44) determines duration of the electromagnetic wave from the transmitter to the receiver at different points along a measurement direction, which extends transverse to a forward movement direction of the device. The evaluation device determines population density of the plants based on variation of the determined duration in the measurement direction. An independent claim is also included for a method for detecting population density of a plant on a field.