Method and device for the state detection of a cutting device

摘要

A method for state detection of a cutting device for agricultural crop is described. The cutting device is formed with a cutting tool set into rotation with respect to a shear bar operates such that a clearance position of the shear bar is changeable with respect to the cutting too. The method includes assigning at least two interspaced sensors for detecting vibrations to the shear bar caused by the cutting tool upon contact with the shear bar, transmitting signals generated by the sensors to a common signal analysis device and, the common signal analysis device comparing the signals and determining a state of the cutting device.

主权项

1. A method for state detection of a cutting device (2) for agricultural crop, which cutting device (2) comprises a cutting tool (3) that is set into rotation with respect to a shear bar (4), wherein a clearance position of the shear bar (4) is changeable with respect to the cutting tool (3), comprising the steps of:
assigning at least two interspaced sensors (11, 12) for detecting vibrations to the shear bar (4) caused by the cutting tool (3) upon contact with the shear bar (4); transmitting signals generated by the sensors (11, 12) to a common signal analysis device (5); and the common signal analysis device (5) comparing the signals and determining a state of the cutting device (2), including assigning signals received from the sensors (11, 12) to individual knives (7) of the chopper drum (3) and deducing information about an origin (6) of the detected vibrations on the shear bar (4) based on a presence of a signal from only one of the sensors (11, 12), or based on points in time of arrival of signals from each of the sensors (11, 12) or both.