Grain Moisture/Wetness Sensor System
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$50.00
for document Grain Moisture/Wetness Sensor System (Invention08-GrainMoisture-WetnessSensor) including the non-exclusive license to use the intellectual property (IP) explained in the document |
From the Summary section:
Total moisture content and surface wetness of grain flowing through the discharge spout of the unloading auger of a combine harvester are measured by a combination of water vapour density and conductivity sensors connected by wireless means to a microprocessor. Water vapour density for the air inside the enclosed volume of the discharge spout is compared to the ambient air water vapour density. The difference value is calibrated against total moisture content of the grain. A pulsed electrical potential of 5 V from a microprocessor is applied to grain kernels in the flowing grain that momentarily bridge a thin (< 1 mm) gap between two electrodes. Although individual kernels are caught up in the flow and do not continuously bridge the electrodes, the bulk effect is to create a constant resistance in parallel with a fixed capacitance. Resistance-capacitance time unit values correspond to the resistance. This resistance is inversely proportional to electrical conductance which is calibrated against surface wetness. A one second sampling rate is possible for total moisture content and surface wetness measurements. Internal moisture of the grain can be calculated by the microprocessor by subtracting surface wetness from the corresponding total moisture value sampled at the same time.
Total moisture content and surface wetness of grain flowing through the discharge spout of the unloading auger of a combine harvester are measured by a combination of water vapour density and conductivity sensors connected by wireless means to a microprocessor. Water vapour density for the air inside the enclosed volume of the discharge spout is compared to the ambient air water vapour density. The difference value is calibrated against total moisture content of the grain. A pulsed electrical potential of 5 V from a microprocessor is applied to grain kernels in the flowing grain that momentarily bridge a thin (< 1 mm) gap between two electrodes. Although individual kernels are caught up in the flow and do not continuously bridge the electrodes, the bulk effect is to create a constant resistance in parallel with a fixed capacitance. Resistance-capacitance time unit values correspond to the resistance. This resistance is inversely proportional to electrical conductance which is calibrated against surface wetness. A one second sampling rate is possible for total moisture content and surface wetness measurements. Internal moisture of the grain can be calculated by the microprocessor by subtracting surface wetness from the corresponding total moisture value sampled at the same time.
Seeker's comments:
Slow, complicated. Little data given to demonstrate effectiveness of concept. No explanation given of why solver thinks this concept will meet accuracy requirements.
Slow, complicated. Little data given to demonstrate effectiveness of concept. No explanation given of why solver thinks this concept will meet accuracy requirements.
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