Multiple wavelength microwave-enhanced infrared thermography,申请号US20020189340-传众专利搜索

Multiple wavelength microwave-enhanced infrared thermography

申请公布号：US6753529(B2)

申请号：US20020189340

申请日期：2002.07.02

申请公布日期：2004.06.22

申请人：

NORTHEASTERN UNIVERSITY

发明人：DIMARZIO CHARLES A.;RAPPAPORT CAREY M.;OKTAR TANER;SAUERMANN GERHARD O.

分类号：F41H11/12;G01N25/72;G01V8/00;(IPC1-7):G01N25/00

主分类号：F41H11/12

摘要：A microwave-enhanced infrared thermography technique for detecting buried objects exploits varying phase shifts experienced by different-frequency microwave signals reflected from objects back toward the surface, the phase shifts resulting in different interference patterns and therefore different temperature distribution patterns near the surface. Respective infrared images of an area are captured prior to microwave heating, after a first heating with a first frequency, and after heating with a second frequency different from the first. Pairs of the images are subtracted to form temperature rise images showing patterns of temperature rise in the two cycles, and the temperature rise images are subtracted to form a difference image which is analyzed to identify characteristics indicating the presence of buried objects.