Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1997-07-28
1999-05-04
Do, Diep N.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324687, 324690, G01R 2726
Patent
active
059007362
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.
REFERENCES:
patent: 3400331 (1968-09-01), Harris
patent: 3671857 (1972-06-01), Bergmanis et al.
patent: 3694742 (1972-09-01), Bergmanis et al.
patent: 3781672 (1973-12-01), Maltby et al.
patent: 3784905 (1974-01-01), Blackwell
patent: 3882381 (1975-05-01), Gregory
patent: 3967912 (1976-07-01), Parker
patent: 4099118 (1978-07-01), Franklin et al.
patent: 4389136 (1983-06-01), Fehrenbach
patent: 4433286 (1984-02-01), Capots et al.
patent: 4468610 (1984-08-01), Hanson
patent: 4604612 (1986-08-01), Watkins et al.
patent: 4766369 (1988-08-01), Weinstein
patent: 4817021 (1989-03-01), Sowerby et al.
patent: 4933853 (1990-06-01), Musil et al.
patent: 4972154 (1990-11-01), Bechtel et al.
patent: 5051026 (1991-09-01), Sovik
patent: 5088854 (1992-02-01), Sovik
patent: 5134380 (1992-07-01), Jonas
patent: 5138268 (1992-08-01), Mulkey et al.
patent: 5210500 (1993-05-01), Pingel et al.
patent: 5213442 (1993-05-01), Sovik
patent: 5223796 (1993-06-01), Waldman et al.
patent: 5309110 (1994-05-01), O'Neill et al.
patent: 5363051 (1994-11-01), Jenstrom et al.
patent: 5378994 (1995-01-01), Novak et al.
patent: 5398547 (1995-03-01), Gerardi et al.
patent: 5436565 (1995-07-01), Gammell
patent: 5484226 (1996-01-01), Emerson et al.
patent: 5521515 (1996-05-01), Campbell
patent: 5551288 (1996-09-01), Geraldi et al.
patent: 5602486 (1997-02-01), Novak
Time domain technique for low frequency dielectric measurements/J. Phys. E: Sci. Instrum., vol. 13 (1980); Printed in Great Britian (month unavailable).
Evaluation of Dielectric Measurement Apparatus For Determining Pavement Density/ Jul. 1969/Prepared by Department of Highways State of Colorado--Planning and Research Division.
Hosterman Richard N.
Moross George G.
Sovik Robert A.
Do Diep N.
Transtech Systems, Inc.
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