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    • 7. 发明授权
    • Method and apparatus for millimeter-wave detection of thermal waves for
materials evaluation
    • 用于材料评估的热波的毫米波检测方法和装置
    • US5020920A
    • 1991-06-04
    • US431363
    • 1989-11-03
    • Nachappa GopalsamiApostolos C. Raptis
    • Nachappa GopalsamiApostolos C. Raptis
    • G01K11/00G01N25/72
    • G01K11/006G01N25/72
    • A method and apparatus for generating thermal waves in a sample and for measuring thermal inhomogeneities at subsurface levels using millimeter-wave radiometry. An intensity modulated heating source is oriented toward a narrow spot on the surface of a material sample and thermal radiation in a narrow volume of material around the spot is monitored using a millimeter-wave radiometer; the radiometer scans the sample point-by-point and a computer stores and displays in-phase and quadrature phase components of thermal radiations for each point on the scan. Alternatively, an intensity modulated heating source is oriented toward a relatively large surface area in a material sample and variations in thermal radiation within the full field of an antenna array are obtained using an aperture synthesis radiometer technique.
    • 一种用于在样品中产生热波并用于使用毫米波辐射测量在地下水平测量热不均匀性的方法和装置。 强度调制加热源朝向材料样品表面上的窄点取向,并使用毫米波辐射计监测在该点周围的窄体积材料中的热辐射; 辐射计逐点扫描样品,计算机存储并显示扫描中每个点的热辐射的同相和正交相分量。 或者,强度调制加热源被定向为材料样品中相对大的表面积,并且使用孔隙合成辐射计技术获得天线阵列的全场内的热辐射的变化。