AGRICULTURAL MACHINES COMPRISING CAPACITIVE SENSORS, AND RELATED METHODS AND APPARATUS

An agricultural machine has a capacitive sensor that includes a transmitter assembly having a signal driver, at least one guard driver, and at least one sensing circuit configured to detect an output of the signal driver. At least one sensing electrode is powered by the signal driver. At least one g...

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Bibliographische Detailangaben
1. Verfasser:	Honeyman, Friedrich Robert
Format:	Patent
Sprache:	eng
Schlagworte:	AGRICULTURE ANIMAL HUSBANDRY FISHING FORESTRY HARVESTING HUMAN NECESSITIES HUNTING INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MOWING PHYSICS TESTING TRAPPING
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Beschreibung
Zusammenfassung:	An agricultural machine has a capacitive sensor that includes a transmitter assembly having a signal driver, at least one guard driver, and at least one sensing circuit configured to detect an output of the signal driver. At least one sensing electrode is powered by the signal driver. At least one guard electrode is powered by the guard driver. The guard electrode is oriented such that a first electric field emanating from the sensing electrode is shaped at least in part by a second electric field emanating from the guard electrode. A method includes broadcasting a first electric field from a sensing electrode into a volume containing crop material, broadcasting a second electric field from a guard electrode, measuring an attribute related to the first electric field, and correlating the measured attribute related to the first electric field to a property of the crop material in the volume.