Tanaka Y.,Ritsumeikan University |
Tanaka K.,Ritsumeikan University |
Sugiyama S.,Ritsumeikan University |
Kurumi Y.,Shiga University of Medical Science |
And 3 more authors.
Japanese Journal of Applied Physics | Year: 2011
A small ultrasonic probe capable of precise control of needle position is required for biopsies taken in abdominal surgery and laparoscopic surgery. We fabricated a small size ring-shaped probe with a through hole to insert the needle. The probe simultaneously detects the object in front of it, e.g., a lesion, and the tip of the needle. The error of the insertion depth measured by this detection was estimated to be less than 10.1% at a depth of more than 5mm when the inner diameter of the probe was 1.1mm and the outer diameter of the needle was 0.6 mm. The results of an experiment using a stomach wall specimen indicate that the position of the needle can be precisely controlled because the needle is directly below the probe. © 2011 The Japan Society of Applied Physics. Source
Kjtd Co. and Krautkramer Japan Co. | Date: 2007-09-18
Non-destructive testing and inspection apparatus and instruments, namely, eddy current testing units; magnetic leakage flux testing units; ultrasonic testing, thickness measurement and flaw detection units; concrete measurement and flaw detection units; concrete hardness and crack depth testing units; ultrasonic leak detector; radar detection units; and parts for the foregoing goods, namely, probes, gauges, meters, digital and analog display units.
KRAUTKRAMER JAPAN COMPANY Ltd | Date: 1993-04-27
non-destructive testing and inspection apparatus and instruments; namely, eddy currect testing units; magnetic leakage flux testing units; ultrasonic testing, thickness measurement and flaw detection units; concrete hardness and crack depth testing units; and parts for the foregoing goods; namely, probes, gauges, meters, digital and analog display units.
Ishikawa M.,Graduate University for Advanced Studies |
Hatta H.,Japan Aerospace Exploration Agency |
Habuka Y.,Krautkramer Japan Co. |
Jinnai S.,Krautkramer Japan Co. |
Utsunomiya S.,Japan Aerospace Exploration Agency
Advanced Composite Materials | Year: 2012
The influence of anisotropic thermal diffusivities on non-destructive testing of CFRP laminates using pulse phase thermography (PPT) was studied analytically. The results show that the optimum frequency for maximizing detectable depths of defects increases concomitantly with the increase in the ratio of the thermal diffusivities in the through-thickness direction to that in the in-plane direction (α′). Furthermore, the phase difference between sound and defective areas decreases significantly with decreased α′. These predicted tendencies were verified through experiments. Experimental results also demonstrated that defects of 10 mm in diameter can be detected up to around 5 mm depth in CFRP with lower α′, but only to around 1 mm in CFRP with higher α′. © 2012?Koninklijke Brill NV, Leiden. Source
Nam K.W.,Pukyong National University |
Kim J.W.,Korea Institute of Materials Science |
Hinoki T.,Kyoto University |
Kohyama A.,Muroran Institute of Technology |
And 2 more authors.
Journal of Nuclear Materials | Year: 2011
Nondestructive evaluation (NDE) of ceramic matrix composites is essential to develop reliable ceramics for industrial applications. In this work, C-scan image analysis has been used to nondestructively characterize surface cracks in SiC/SiC composite ceramics. The possibility of detecting surface cracks was evaluated experimentally using ultrasonic equipment of μ-SDS with a probe of 170 MHz. The defocus method could detect the shape of surface cracks. As a whole, when the defocus method for the probe was used, we conclude that there is a good possibility of detecting surface cracks. © 2010 Elsevier B.V. All rights reserved. Source