Paving material density indicator and method using capacitance
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United States of America Patent
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May 4, 1999
Grant Date -
N/A
app pub date -
Jul 28, 1997
filing date -
Jul 28, 1997
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention relates generally to paving equipment. More particularly, the present invention relates to a paving material density indicator which has a selectively shaped sensor to control at least one of the depth, area, sensitivity and shape of a density determination. The effect on sensor capacitance is measured using a constant current source and is used to determine density of the paving material. The invention is also a method for determining density of paving material and a set of sensors for density determination.
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