Results 171 to 180 of about 6,856 (205)

Review of pulse phase thermography

SPIE Proceedings, 2015
Pulsed phase thermography (PPT) was proposed in 1996 to enhance results from pulsed thermography experiments. PPT can be thought as the link between pulsed thermography (PT) and lock-in thermography (LT), since it provides phase delay (and amplitude) data (as in LT) from a PT configuration.
C. Ibarra-Castanedo, X. P. Maldague
openaire   +1 more source

Pulsed Eddy Current Thermography and Applications

2011
In this paper we report on the application of the pulsed eddy current thermography inspection technique to the detection and quantification of defects in a variety of materials. After introducing the appropriate modelling and simulation techniques an overview of a typical PEC thermography system setup is provided.
Tian, GY, Wilson, John; id_orcid 0000-0003-2139-1250, Cheng, L, Almond, Darryl P, Kostson, Erik, Weekes, Benjamin   +5 more
openaire   +2 more sources

Pulsed eddy current thermography: system development and evaluation

Insight - Non-Destructive Testing and Condition Monitoring, 2010
There is a need for fast and efficient techniques to inspect engineering structures and complex components such as aircraft turbine blades to identify potential sites of failure. Pulsed eddy current (PEC) thermography is a new inspection technique which allows the user to capture the eddy current distribution in a component or structure using infrared ...
Wilson J, Tian GY, Abidin IZ, Yang SX, Almond D   +4 more
openaire   +3 more sources

Pulsed thermography modeling

AIP Conference Proceedings, 2002
A simple thermographic model has been developed that accurately describes the surface temperature response of a panel with flat bottom holes of different depths and diameters to a short heat pulse. This model assumes that a thin layer of material absorbs a radiant pulse of duration τ and that it subsequently cools off due to normal and lateral ...
openaire   +1 more source

Applications of pulse heating thermography and lock-in thermography to quantitative nondestructive evaluations

Infrared Physics & Technology, 2002
This paper describes several experimental investigations of newly developed thermographic NDT techniques based on the transient temperature measurements. Several experimental results of the pulse heating thermographic NDT and the lock-in thermographic NDT are shown.
Takahide Sakagami, Shiro Kubo
openaire   +1 more source

Model-based Inversion for Pulse Thermography

Experimental Mechanics, 2019
Pulse or flash thermography is a method of nondestructive evaluation that finds subsurface flaws in materials by observing a heat pulse and subsequent cooldown using a thermal camera. A fundamental constraint of pulse thermography is lateral heat diffusion that tends to blur the shapes of defects.
S.D. Holland, B. Schiefelbein
openaire   +1 more source

Pulsed thermography for the NDT of honeycomb composite

Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 2019
Honeycomb sandwich Composite has wide applications in manufacture, such as aircraft, automobile, rail transit, and so on, due to its special advantages. However, defects always exist in the honeycomb composite during manufacturing and in-service period, liquid ingress and debondings are the most typical defects.
Xiaoheng Wang, Zuoming Sun, Jian Zhou, Dapeng Chen   +3 more
openaire   +1 more source

A quantitative analysis of pulsed video thermography

NDT & E International, 1991
Abstract The defect imaging capability of a pulsed video thermography system is assessed by detailed quantitative analysis of its performance in imaging a set of well characterized artificial defects in a steel test-piece. An analytical model is presented which provides an understanding of the imaging process.
S.K. Lau, D.P. Almond, J.M. Milne
openaire   +1 more source

Square pulse thermography in frequency domain

SPIE Proceedings, 2008
In this paper a new approach for quantitative non-destructive testing (NDT) of near-surface structures in civil engineering (CE) with active thermography is presented. It adopts the method known as pulsed phase thermography (PPT) for the special requirements of NDT-CE and was developed in a German research project of the Federal Institute for Materials
openaire   +1 more source

Defect Characterization Using Pulsed Thermography

Journal of Nondestructive Evaluation, 2012
Infrared Thermography is one of the advanced NDE methods that is becoming attractive due to its ability to inspect non invasively large areas in short times and provide full field images in a non contact nature. While initially the method started as a qualitative technique for defect detection alone, with the advent of lock in and pulsed techniques ...
D. Sharath, M. Menaka, B. Venkatraman
openaire   +1 more source