H
Hirokazu Karasawa
Researcher at Toshiba
Publications - 23
Citations - 640
Hirokazu Karasawa is an academic researcher from Toshiba. The author has contributed to research in topics: Ultrasonic sensor & Signal. The author has an hindex of 9, co-authored 23 publications receiving 633 citations.
Papers
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Patent
3d ultrasonographic device
Kazuo I.P.Div. Toshiba Corp. Hiyama,Takahiro Ikeda,Motohisa Abe,Hirokazu Karasawa,Masahiro Katayama +4 more
TL;DR: In this article, a three-dimensional ultrasonic inspection apparatus is described, which includes an ultrasonic sensor as a transducer, in which a plurality of piezoelectric vibrators are disposed in a matrix or an array.
Journal ArticleDOI
Development of Under-sodium Three-dimensional Visual Inspection Technique Using Matrix-arrayed Ultrasonic Transducer
Hirokazu Karasawa,Mamoru Izumi,Takehiko Suzuki,Satoshi Nagai,Masaaki Tamura,Shyuuichi Fujimori +5 more
TL;DR: In this paper, an under-sodium ultrasonic visual inspection technique was developed in order to observe in-vessel structures in a Fast Breeder Reactor (FBR) whose reactor vessel is filled with opaque liquid sodium.
Patent
Ultrasonograph, ultrasonic transducer, examining instrument, and ultrasonographing device
Hirokazu Karasawa,Masayuki Nakamoto,Makoto Ochiai,Katsuyoshi Fukuda,Taiji Hirasawa,Takahiro Ikeda +5 more
TL;DR: An ultrasonograph for carrying out examination simply and quickly while achieving high resolution and high speed processing, an ultrasonic transducer, an examining instrument, and ultrasonographing device the subject matter are disclosed as mentioned in this paper.
Journal ArticleDOI
High-cycle fatigue characteristics of quasi-isotropic CFRP laminates
TL;DR: In this paper, the authors investigated high-cycle fatigue characteristics of quasi-isotropic carbon fiber reinforced plastic (CFRP) laminates [−45/0/45/90]s up to 108 cycles.
Patent
Three-dimensional ultrasonic imaging device
TL;DR: In this paper, an ultrasonic transducer with a plurality of piezoelectric vibrators and a signal detecting circuit was proposed for improving the accuracy of internal inspection of an object to be inspected.