Abstract
Ultrasonic technique is an indispensable diagnostics to evaluate internal conditions. The conventional ultrasonic technique using a wave property, such as a reflected wave, wave speed, attenuation of amplitude and frequency spectrum is, however, not effective in some cases. In this study, we propose to use an instantaneous frequency of the ultrasonic pulse. The instantaneous frequency expresses a transition of the frequency of the ultrasonic pulse, so that it is sensitive to a slight variation of the ultrasonic frequency. The effectiveness is demonstrated through an experiment on adhesive strength of epoxy adhesive, which is controlled by curing process. The conventional ultrasonic technique is difficult for an evaluation of this adhesive strength. On one hand, the instantaneous frequency of an ultrasonic pulse, which passes through the adhesive layer, certainly distinguishes the difference of the adhesive strength. It is also shown that the adhesive characteristics pertaining to their strength are modeled as damping coefficients, which is demonstrated through a simple simulation of one-dimensional ultrasonic wave propagation.
| Original language | English |
|---|---|
| Pages (from-to) | 2993-3006 |
| Number of pages | 14 |
| Journal | Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C |
| Volume | 77 |
| Issue number | 780 |
| Publication status | Published - 2011 |
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All Science Journal Classification (ASJC) codes
- Mechanical Engineering
- Mechanics of Materials
- Industrial and Manufacturing Engineering
Cite this
New diagnostic method using instantaneous frequency of ultrasonic pulse (evaluation of adhesive strength of epoxy resin). / Inoue, Takumi; Nakano, Takahiro.
In: Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, Vol. 77, No. 780, 2011, p. 2993-3006.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - New diagnostic method using instantaneous frequency of ultrasonic pulse (evaluation of adhesive strength of epoxy resin)
AU - Inoue, Takumi
AU - Nakano, Takahiro
PY - 2011
Y1 - 2011
N2 - Ultrasonic technique is an indispensable diagnostics to evaluate internal conditions. The conventional ultrasonic technique using a wave property, such as a reflected wave, wave speed, attenuation of amplitude and frequency spectrum is, however, not effective in some cases. In this study, we propose to use an instantaneous frequency of the ultrasonic pulse. The instantaneous frequency expresses a transition of the frequency of the ultrasonic pulse, so that it is sensitive to a slight variation of the ultrasonic frequency. The effectiveness is demonstrated through an experiment on adhesive strength of epoxy adhesive, which is controlled by curing process. The conventional ultrasonic technique is difficult for an evaluation of this adhesive strength. On one hand, the instantaneous frequency of an ultrasonic pulse, which passes through the adhesive layer, certainly distinguishes the difference of the adhesive strength. It is also shown that the adhesive characteristics pertaining to their strength are modeled as damping coefficients, which is demonstrated through a simple simulation of one-dimensional ultrasonic wave propagation.
AB - Ultrasonic technique is an indispensable diagnostics to evaluate internal conditions. The conventional ultrasonic technique using a wave property, such as a reflected wave, wave speed, attenuation of amplitude and frequency spectrum is, however, not effective in some cases. In this study, we propose to use an instantaneous frequency of the ultrasonic pulse. The instantaneous frequency expresses a transition of the frequency of the ultrasonic pulse, so that it is sensitive to a slight variation of the ultrasonic frequency. The effectiveness is demonstrated through an experiment on adhesive strength of epoxy adhesive, which is controlled by curing process. The conventional ultrasonic technique is difficult for an evaluation of this adhesive strength. On one hand, the instantaneous frequency of an ultrasonic pulse, which passes through the adhesive layer, certainly distinguishes the difference of the adhesive strength. It is also shown that the adhesive characteristics pertaining to their strength are modeled as damping coefficients, which is demonstrated through a simple simulation of one-dimensional ultrasonic wave propagation.
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M3 - Article
VL - 77
SP - 2993
EP - 3006
JO - Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
JF - Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
SN - 0387-5024
IS - 780
ER -