| 翻訳と辞書 |
| Infrared non-destructive testing of materials ： ウィキペディア英語版 |
Infrared non-destructive testing of materials
Active thermography is an advanced nondestructive testing procedure, which uses a thermography measurement of a tested material thermal response after its external excitation. This principle can be used also for non-contact infrared non-destructive testing (IRNDT) of materials. The IRNDT〔(Active thermography laboratory, University of West Bohemia, New Technologies - Research Centre, department Thermomechanics of Technological Processes )〕 method is based on an excitation of a tested material by an external source, which brings some energy to the material. Halogen lamps, flash-lamps, ultrasound generator or other sources can be used as the excitation source for the IRNDT. The excitation causes a tested material thermal response, which is measured by an infrared camera. It is possible to obtain information about the tested material surface and sub-surface defects or material inhomogeneities by using a suitable combination of excitation source, excitation procedure, infrared camera and evaluation method.
Modern thermographic systems with high-speed and high-sensitivity IR cameras extend the possibilities of the inspection method. Modularity of the systems allows their usage for research and development applications as well as in modern industrial production lines.
Thermovision nondestructive testing of components can be carried out on wide range of various materials. Thermographic inspection of material can be regarded as method of infrared defectoscopy, that is capable to reveal material imperfections such as cracks, defects, voids, cavities and other inhomogeneities. The thermographic testing can be provided on individual components in laboratory or directly on technology facilities that are in duty.
== Introduction to infrared thermography ==
Infrared (IR) thermography〔(Laboratory of thermal fields measurement, University of West Bohemia, New Technologies - Research Centre, department Thermomechanics of Technological Processes )〕 is an analysis technique based on the detection of radiation in the IR wavelength spectrum. According to the black body radiation law, all objects with temperature greater than absolute zero emit IR radiation. The device detecting and composing a 2D image of the IR radiation is generally called an IR camera or a thermographic camera, also referred to as an infrared camera. The result of the thermographic recording is an image or a sequence, which corresponds to the intensity of the thermal radiation of the recorded object. The recording is called a thermogram. The intensity of the thermal radiation of the object is directly connected with the object temperature. The thermogram is therefore an image of the object surface temperature distribution. IR thermography is in the most cases used for non-contact measurement of spatial and time distribution of temperature fields.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Infrared non-destructive testing of materials」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|