Samir D Trabelsi

US Patent:

6691563, Feb 17, 2004

Filed:

Apr 11, 2001

Appl. No.:

09/829966

Inventors:

Samir Trabelsi - Athens GA
Stuart O. Nelson - Athens GA
Andrzej W. Kraszewski - Athens GA

Assignee:

The United States of America as represented by the Department of Agriculture - Washington DC

International Classification:

G01N 2556

US Classification:

73 73, 324640

Abstract:

A universal calibration method and apparatus for nondestructive real time determination of moisture content in particulate or granular materials by radio-frequency sensors is described which is bulk-density and material-independent and remains valid across instruments of different designs.

US Patent:

8629681, Jan 14, 2014

Filed:

May 18, 2010

Appl. No.:

12/782079

Inventors:

Samir Trabelsi - Athens GA, US
Stuart O. Nelson - Athens GA, US

Assignee:

The United States of America, as represented by the Secretary of Agriculture - Washington DC

International Classification:

G01R 27/04

US Classification:

324639, 324637, 324640

Abstract:

A microwave sensor and algorithm for instantaneous and nondestructive determination of bulk density and moisture content in granular or particulate materials at a single microwave frequency, especially agricultural commodities, which uses an inexpensive microwave circuit for determining the real and imaginary parts of relative complex permittivity using an algorithm for phase correction.

US Patent:

61475033, Nov 14, 2000

Filed:

May 8, 1998

Appl. No.:

9/074394

Inventors:

Stuart O. Nelson - Athens GA
Samir Trabelsi - Athens GA
Andrzej W. Kraszewski - Athens GA

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

G01N 2204

US Classification:

324637

Abstract:

A method for simultaneously and independently measuring moisture content and bulk density of particulate materials using radio-frequency measurements allowing for on-line, real-time monitoring and control. Moisture and density are determined by measurements of complex permittivities. This method is based on the use of the dielectric properties of the materials for density and water content determination.

US Patent:

20190377054, Dec 12, 2019

Filed:

Oct 24, 2018

Appl. No.:

16/169103

Inventors:

- Washington DC, US
Samir Trabelsi - Watkinsville GA, US

International Classification:

G01R 35/00
G01N 22/00

Abstract:

A low cost planar transmission line sensor and simple calibration method for measuring the complex permittivity of materials with minimal sample preparation over a wide band of radio- and microwave frequencies. The sensor is also used for measuring anisotropic dielectric properties of materials with a defined grain.

US Patent:

20160187402, Jun 30, 2016

Filed:

Aug 28, 2015

Appl. No.:

14/839083

Inventors:

- Washington DC, US
Samir Trabelsi - Watkinsville GA, US

International Classification:

G01R 27/26
G01R 35/00
G01N 27/22

Abstract:

A low cost planar transmission line sensor and simple calibration method for measuring the complex permittivity of materials with minimal sample preparation over a wide band of radio- and microwave frequencies. The sensor is also used for measuring anisotropic dielectric properties of materials with a defined grain.