Microwave moisture sensing via waveguide with slot array

Details Microwave moisture sensing via waveguide with slot array Microwave moisture sensing via waveguide with slot array

2005-06-07

2005-06-07

Patidar, Jay (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S638000, C324S646000

Reexamination Certificate

active

06903557

ABSTRACT:
A generator (6) directs microwave signals to a waveguide (1) having a linear array of slots (2), and the signals are received by measuring device (5). The local permittivity or moisture content of material adjacent the waveguide (1), such as a stack of timber, may be determined at each slot (2) via regression analysis. The total permittivity or moisture may be determined by averaging measurements obtained for both transmission directions of the waveguide (1). The apparatus may be used for controlling drying parameters, such as drying time, for the material.

REFERENCES:
patent: 5103181 (1992-04-01), Gaisford et al.
patent: 5619143 (1997-04-01), Stevens et al.
patent: 6411106 (2002-06-01), Holmes et al.
patent: WO 90/09578 (1990-08-01), None
patent: WO 97/21992 (1997-06-01), None
Derwent Abstract Accession No. 87-255693/36, SU 1285362 A (Zaporo Mech. Eng. Cons) Jan. 23, 1987 Abstract.

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