Sensor for harvesting machines
First Claim
1. In a harvesting machine for harvesting agricultural crops and having a threshing mechanism and a separating mechanism, sensing means for monitoring the threshing and separating performance and harvesting losses including a pulse detector and a vibration sensor, the improvement comprising:
- a detachable connection between the pulse detector and the vibration sensor, the vibration sensor including a sleeve having a surface communicating with the pulse detector and a bore for receiving the detachable connection, and the vibration sensor including a piezoelectric element circumjacent the sleeve and isolated from the detachable connection.
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Abstract
The invention relates to a sensor for determining the structure-borne sound vibrations generated by the impingement of grains on a pulse detector in an agricultural machine for harvesting crops and to a device for operational monitoring of the sensor and improved signal evaluation.
Such sensors are used to monitor threshing and separating performance at various points in a harvesting machine. Depending on the area of application, various forms of a pulse detector are used. These can have the shape of a plate, a tube, a rod or other similar profiles. Attached to these detectors are vibration detectors. A particularly strong connection between the vibration detector and the pulse detector is achieved by using a piezo-ceramic vibration sensor and its attachment by means of a screw connection.
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Citations
25 Claims
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1. In a harvesting machine for harvesting agricultural crops and having a threshing mechanism and a separating mechanism, sensing means for monitoring the threshing and separating performance and harvesting losses including a pulse detector and a vibration sensor, the improvement comprising:
- a detachable connection between the pulse detector and the vibration sensor, the vibration sensor including a sleeve having a surface communicating with the pulse detector and a bore for receiving the detachable connection, and the vibration sensor including a piezoelectric element circumjacent the sleeve and isolated from the detachable connection.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. 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.
- 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;
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25. 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.
- 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;
Specification