The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 2007
Filed:
Oct. 06, 2004
Chan IL Park, Gyeonggi-do, KR;
Seung Hyun Cho, Gyeonggi-do, KR;
Soon Woo Han, Seoul, KR;
Yoon Young Kim, Seoul, KR;
Chan Il Park, Gyeonggi-do, KR;
Seung Hyun Cho, Gyeonggi-do, KR;
Soon Woo Han, Seoul, KR;
Yoon Young Kim, Seoul, KR;
Seoul National University Industry Foundation, Seoul, KR;
Abstract
A method and an apparatus for structural diagnosis, which generates torsional waves upon a shaft, beam or pipe having arbitrary cross-sections, such as a circular cross-section, and senses existence or location of the cracks through analyzing reflected waves are disclosed. A magnetostrictive transducer comprises a plurality of ferromagnetic strips attached around a circumference of a member having a arbitrary cross-section with a fixed inclination; a first housing disposed to surround the ferromagnetic strips, the first housing being made of insulating material; and a coil would around the first housing. The magnetostrictive transducer can generate torsional waves upon a member when a current is supplied to the coil, and can measure reflected torsional waves.