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When compared with other classical NDT techniques such as ultrasonic or radiographic testing, thermographic inspection is safe, nonintrusive, and usually noncontact, allowing the detection of relatively shallow subsurface defects (a few millimeters in depth) under large surfaces (typically covering an area of 30 by 30 cm (12 by 12 in) at once, although inspection of larger surfaces is possible ...
Active thermography, particularly lock-in thermography, is widely employed for inspecting solar cells [6] [8]. While effective, lock-in thermography often requires physical contact with the solar cell for excitation. However, techniques that involve periodic excitation using light sources allow for non-contact testing of electrode-free cells.
NDT professionals and managers who seek to further their growth, knowledge and experience to remain competitive in the rapidly advancing technology field of nondestructive testing should consider joining NDTMA, a member organization of NDT Managers and Executives who work to provide a forum for the open exchange of managerial, technical and ...
Inset shows false color infrared thermograph of a roof on a sunny day; the white surfaces (colored blue in the thermograph) have been coated with an elastomer to reduce solar loading and have a surface temperature of approximately 60 °F (16 °C); the gray surfaces (colored red/white in the thermogram) are a standard asphalt (bitumen) coating and have a surface temperature of approximately 160 ...
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A suspect has been arrested following the reported shooting of Alabama stepsisters Kayden Lynch, 19, and Madison Daly, 18, on Christmas Eve. Per Lee County outlet The Observer, 18-year-old Jalen ...
A Texas jerky seller allegedly threatened to show up to a Capital One office with “a machete and gasoline” and “do things that are unforgivable” in a rage at a $543 debt, according to a ...
Testing and control of these units is also essential to maintain alternative plans should critical machinery fail. General purpose or balance of plant machines – These are the machines that make up the remainder of the plant and normally monitored using a handheld data collector as mentioned previously to periodically create a picture of the ...