Soil compaction measurement
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United States of America Patent
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Jul 5, 2005
Grant Date -
Feb 26, 2004
app pub date -
Jun 13, 2003
filing date -
Feb 1, 1996
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An apparatus and method are provided for the in-situ measurement of the stiffness of a layer of soil or other surface of interest. The apparatus includes a contact foot for engaging the surface and a drive transducer coupled to the contact foot for applying a vibratory force to the contact foot in response to a drive signal. A motion sensor is coupled to the contact foot and in a preferred embodiment an additional sensor measures the force applied to the contact foot and hence to the surface. These sensors generate corresponding output signals. The output signals are used to generate a measurement signal that is representative of the surface stiffness.
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