超音波の瞬時振動数に着目した物体内部の状態推定

Translated title of the contribution: Estimation of Inner State Using Instantaneous Frequency of Ultrasonic Wave

中野 貴裕, 井上 卓見

Research output: Contribution to journalArticlepeer-review

Abstract

The conventional ultrasonic inspection is a detection of the reflected ultrasonic pulse from the abnormal point in an inspected object. However, an indistinct abnormality does not reflect ultrasound. The conventional ultrasonic inspection is in unavailable to detect it. In this study, the authors propose to use an instantaneous frequency of the ultrasonic pulse. The instantaneous frequency can show the significant difference in a frequency of the ultrasonic pulse passing through the indistinct abnormality because the instantaneous frequency can express the frequency variation in detail. It is difficult for the usual Fourier transform to catch a very small change in ultrasonic frequency because of limitation of a frequency resolution. A feasibility of the proposed method is demonstrated through a simple experiment.
Translated title of the contributionEstimation of Inner State Using Instantaneous Frequency of Ultrasonic Wave
Original languageJapanese
Pages (from-to)161-161
Number of pages1
Journal理論応用力学講演会 講演論文集
Volume60
Issue number0
DOIs
Publication statusPublished - 2011

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