منابع مشابه
A Review of Microwave Thermography Nondestructive Testing and Evaluation
Microwave thermography (MWT) has many advantages including strong penetrability, selective heating, volumetric heating, significant energy savings, uniform heating, and good thermal efficiency. MWT has received growing interest due to its potential to overcome some of the limitations of microwave nondestructive testing (NDT) and thermal NDT. Moreover, during the last few decades MWT has attract...
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Drilling boreholes is common practice in geotechnical and geoenvironmental investigations and in various other ex ploration, testing, and monitoring appli cations. When a casing is placed in a borehole an annular space is created be tween the casing and the surrounding soil. If not properly sealed, this annular space can be a potential path for trans port of contaminants in the subsurface e...
متن کاملBroadband Microwave Interferometry for Nondestructive Evaluation
A broadband microwave interferometric technique for scanning near-field microscopy applications is proposed. The method is based on the association of a vector network analyzer, a hybrid coupler, an evanescent microwave coaxial probe and a precise impedance tuner built up with a high precision programmable delay line and a variable motor-driven attenuator. Advantages such as simplicity of opera...
متن کاملOptimization of a Portable Microwave Interference Scanning System for Nondestructive Testing of Multi-layered Dielectric Materials
A portable microwave interference scanning system has been demonstrated to detect damage in composite ceramic armor test specimens including engineered features in specially fabricated surrogates. The system has been optimized for detection of identified features in sample specimens. The system has been optimized for portability and field application flexibility, including miniaturization and w...
متن کاملNondestructive Testing Resolution:
The practical limits on resolution of images from seismic or radar (electromagnetic) data depend on the spectrum of the source pulse, the incompleteness of the recording geometry, and the fidelity with which one can model the reference medium. These factors together prevent one from recovering a point image from data produced by a point diffractor in a given body. A simple imaging formula quant...
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ژورنال
عنوان ژورنال: Applied Physics Research
سال: 2012
ISSN: 1916-9647,1916-9639
DOI: 10.5539/apr.v4n4p8