Densitometer using a microwave

Details Densitometer using a microwave Densitometer using a microwave

1994-03-30

1996-03-26

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

324637, G01R 2732, G01N 2200

Patent

active

055023932

ABSTRACT:
A densitometer using a microwave comprises a microwave detection section, a phase detection section, and a density calculation section. The microwave detection section picks up a first microwave receiving signal by transmitting and receiving a microwave of a frequency band of 1.4 --GHz-- to 1.75 --GHz-- to/from a reference fluid, and a second microwave receiving signal by transmitting and receiving a microwave of a frequency band of 1.4 --GHz-- to 1.75 --GHz-- to/from a measuring fluid. The phase detection section obtains a phase difference between the first microwave receiving signal and the second microwave receiving signal. The density calculation section calculates the density of measuring fluid based on the phase difference obtained by the phase detection section.

REFERENCES:
patent: 4486714 (1984-12-01), Davis et al.
patent: 4764718 (1988-08-01), Revus et al.
patent: 4888547 (1989-12-01), McGinn et al.
patent: 5369369 (1994-11-01), Cutmore
patent: 5455516 (1995-10-01), Jean et al.
Advances in Instrumentation and Control, vol. 47, Pt. 1, 1992, pp. 617-632, John L. Daniewicz, "Improved On-Line Measurement of Water Content and Other Product Mixture Ratios Using Microwave Spectrum Analysis".

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