Herbert DAMMANN's Curves-Control-Application (C-C-A) for Precisely Adjusted Spreading

In practice, the problem of uneven application rates is often encountered in curves: the rate is lower on the outside of the curve and higher than the desired value on the inside of the curve.

In addition, many fields are not rectangular or contain obstacles that have to be bypassed. Deviations from the expected value of 40 to 160 % of the quantity applied by a 36 m boom are then reached.

With Curves~Control~Application, the applied quantity is adjusted so that the average of each section matches the expected value. This is made possible by the calculation of the data by the curve-driving module. The necessary data come from a curve radius sensor (similar to the control sensor for track guidance), the speed measured by the wheel sensor, the machine data and the expected application rate per hectare (l/ha or kg/ha).

This calculation makes it possible to evaluate the percentage deviation in each section from the expected value. The on-board computer compensates for the deviations in the sections. It regulates the applied quantity by switching on the nozzles of the multiple-nozzle carrier, by changing the spray pressure in the section, or by combining both parameters.