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AssigneeDeere & Company
InventorsAndré Heinrich, Matthias Grimsel, Gerd Bernhardt
Estimating the term…
A method and arrangement for determination of the sharpness of chopping blades of a field chopper during chopping includes the steps of measuring, at least at two points in time, a characteristic parameter of the operating oscillation of a component of the chopping unit. Each such measurement obtains the oscillation fractions of at least two frequency bands of the measured signal or its peak, with the ratio between the two measurements being evaluated to generate a signal, when a certain deviation is determined between the initial measurement and the current measurement, which is indicative of the need to sharpen the chopping blades and the counterblade. The sharpening process can then be automatically initiated.
A forage harvester with a chopping drum rotating about an axis and carrying a plurality of chopping blades, the forage harvester having means for feeding crop material across a counterblade mounted on a counterblade support and cooperating with the chopping blades to define a cutting gap and to cut the crop material into relatively short lengths as it passes across the gap, a sensor mounted at a protected location on one of the bottom of the counterblade and the rear of the counterblade and the counterblade support, the sensor operable to measure a parameter of oscillation of the counterblade, the sensor connected to a processing device which is operable to perform the steps of:
Dependencies are inferred from the claim text.