Method of detecting stones in the intake of a field chopper

Details Method of detecting stones in the intake of a field chopper Method of detecting stones in the intake of a field chopper

A - Human Necessities

01

D

340/124, 341/78

A01D 75/18 (2006.01)

Patent

CA 1270926

ABSTRACT OF THE DISCLOSURE A hard foreign body in a stream of cut crop being moved by a conveyor in an agricultural machine to a crop comminuter of the machine is detected by first compressing the steam of cut crop transversely of its displacement direction between a pair of feed elements one of which is movable toward and away from the other and generating an actual-value output corresponding to the acceleration of the movable element toward and away from the other element. This output is compared with a set point corresponding to an acceleration level not normally exceeded by the element when the crop stream contains ho hard foreign objects. An error signal is generated when the actual-value output exceeds the set point. When the error signal is issued advance of the conveyor is stopped and/or a warning is issued. The actual-value output is only generated when the acceleration of the movable feed element exceeds a predetermined limit. The actual-value output is a voltage and the set point is also a voltage.

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