Sensor for harvesting machines

In a harvesting machine for harvesting agricultural crops and having a threshing mechanism and a separating mechanism, the improvement comprising:

• a sensor for monitoring the threshing and separating performance and harvesting losses and including a pulse detector and a piezoelectric vibration sensor with means for communicating said piezoelectric vibration sensor with the pulse detector and a detachable connection between the pulse detector and piezoelectric vibration sensor;
• a device for operational testing of the sensor and having an evaluating unit with a diagnostic partial range, in which the vibrations of the pulse detector are measured upon a specific stimulation of the pulse detector;
• and a pulse emitter attached to the pulse detector, and wherein said stimulation is generated by the pulse emitter.

In a harvesting machine for harvesting agricultural crops and having a threshing mechanism and a separating mechanism, the improvement comprising:

• a sensor for monitoring the threshing and separating performance and harvesting losses and including a pulse detector and a piezoelectric vibration sensor with means for communicating said piezoelectric vibration sensor with the pulse detector and a detachable connection between the pulse detector and piezoelectric vibration sensor;
• a device for operational testing of the sensor and having an evaluating unit with a diagnostic partial range, in which the vibrations of the pulse detector are measured upon a specific stimulation of the pulse detector;
• and a pulse emitter attached to the piezoelectric vibration sensor, and wherein said stimulation is generated by the pulse emitter.