Journal ArticleDOI
Investigation of Uncooled Microbolometer Focal Plane Array Infrared Camera for Quantitative Thermography
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TLDR
In this article, the capabilities of the new microbolometer infrared cameras for quantitative thermal nondestructive evaluation are investigated by minimizing the squared difference between the data and a thermal model on samples with fabricated defects.Abstract:
Thermal nondestructive evaluation has shown promise as a potential NDE technology for next generation US Army rotorcraft structures because it is rapid, noncontacting, and able to inspect complex geometries. To successfully apply thermal inspection systems for field use, the cost and size must be lowered. The infrared camera is a major factor contributing to the overall cost of commercially available thermal inspection systems. Recent advances in uncooled microbolometer focal plane array detectors have resulted in low cost, small size/weight, and low power consumption cameras. These attributes make this technology well suited for portable low cost thermal inspection systems. The purpose of this paper is to investigate the capabilities of the new microbolometer infrared cameras for quantitative thermal nondestructive evaluation. Quantitative thermal diffusivity and thickness images are obtained by minimizing the squared difference between the data and a thermal model on samples with fabricated defects. Critical infrared camera features such as spatial and temperature resolution, detector response time, and detector stability are studied by comparing results to a conventional thermal imaging camera using a cooled InSb focal plane array detector. Finally several techniques are presented to improve the camera’s performance. These techniques include temporal background subtraction, use of a synchronized electronic shutter system, and cyclic flash heating.read more
Citations
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Journal ArticleDOI
Recent Progress of Quantum Dot‐Based Photonic Devices and Systems: A Comprehensive Review of Materials, Devices, and Applications
Journal ArticleDOI
Drift Correction of Lightweight Microbolometer Thermal Sensors On-Board Unmanned Aerial Vehicles
Francisco Javier Mesas-Carrascosa,Fernando Juan Pérez-Porras,Jose Emilio Meroño de Larriva,Carlos Mena Frau,Francisco Agüera-Vega,Fernando Carvajal-Ramírez,Patricio Martínez-Carricondo,Alfonso García-Ferrer +7 more
TL;DR: This study presents a drift correction methodology for microbolometer sensors based on redundant information from multiple overlapping images that yielded a rate of error lower than 1° C compared to those where no drift correction was applied.
Journal ArticleDOI
Application of infrared thermography to the study of behavioural fever in the desert locust
TL;DR: The detail provided by the large data sets revealed for the first time an early onset of fever in S. gregaria during infection with Metarhizium acridum viz. 20–25 h post-inoculation in comparison to the 48 h demonstrated previously.
Journal ArticleDOI
A review of the thermal biology and ecology of molluscs, and of the use of infrared thermography in molluscan research
TL;DR: This review thoroughly review the thermal biology and ecology of molluscs, and the previous biological and ecological applications of infrared thermography—including the very few in mollsuscan research, and provides detailed recommendations related to the proper use ofrared thermography.
Journal ArticleDOI
Reliable thermosonic inspection of aero engine turbine blades
TL;DR: In this paper, the application of Thermosonics as a screening technique for identifying cracked aero engine turbine blades is described, which is a rapid and potentially, a cost-saving non-destructive testing (NDT) technique for rejecting cracked turbine blades as part of the regular inspection cycle.
References
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Numerical recipes: the art of scientific computing
William H. Press,Brian P. Flannery,Saul A. Teukolsky,William T. Vetterling,J.R. Chipperfield +4 more
Proceedings ArticleDOI
Uncooled thermal imaging with monolithic silicon focal planes
TL;DR: The characteristics of Honeywell's two-dimensional (2D) arrays of micromachined microbolometers were summarized in this paper, and practical methods of operating these arrays in high-sensitivity room-temperature infrared (IR) imaging systems were discussed.
Journal Article
Thermographie nondestructive evaluation of industrial materials and structures
Proceedings ArticleDOI
Thermal diffusivity imaging of aerospace materials and structures
TL;DR: In this article, the authors used thermal diffusivity imaging for inspection and characterization of materials and structures, which enables more precise imaging of variations in the material or structure needed to track changes resulting from fatigue or aging processes.
Damage Detection in Rotorcraft Composite Structures Using Thermography and Laser-Based Ultrasound
TL;DR: In this article, the authors evaluated two non-contact inspection techniques, namely, Thermography and Laser-Based Ultrasound (Laser UT), for composite rotorcraft structural composites.