コヤマ マサシ   KOYAMA Masashi
  小山 昌志
   所属   理工学部 総合理工学科(機械工学系)
   職種   准教授
言語種別 英語
発行・発表の年月 2018/08
形態種別 学術雑誌
査読 査読あり
標題 Reducing inspection time of pulse phase thermography by using phase data at higher frequency range
執筆形態 共著
掲載誌名 Infrared Physics & Technology
掲載区分国外
巻・号・頁 92,pp.53-59
総ページ数 7
著者・共著者 Masashi Ishikawa,Nagahisa Ogasawara,Hiroyuki Yamada, Hideyuki Kasano, Masashi Koyama, Hiroshi Hatta,Shin Utsunomiya, Yutaka Nishitani, Ryo Fukui
概要 The defect detection capability of pulse phase thermographic (PPT) non-destructive inspection depends on the frequency of Fourier transformed phase images. Conventionally, phase images at lower frequencies are required to detect deeper defects or defects in objects with lower thermal diffusivity. However, in order to obtain phase images at a lower frequency, a longer inspection time is required. In this paper, we suggest using the phase contrast between defective and non-defective areas that appears in a higher frequency range in order to reduce the inspection time of the PPT method. The numerical calculations and experimental results revealed that the phase data have a small peak (PH) in the high frequency range and that defects can be detected in phase images at the PH frequency because a discernible phase contrast is observed there.