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1. 发明授权

US07621189B2 Apparatus and method for generating and sensing torsional vibrations using magnetostriction 有权
标题翻译：使用磁致伸缩产生和感测扭转振动的装置和方法
公开(公告)号：US07621189B2
公开(公告)日：2009-11-24
申请号：US11443196
申请日：2006-05-31
申请人： Yoon Young Kim , Seung Hyun Cho , Soon Woo Han , Chan Il Park
发明人： Yoon Young Kim , Seung Hyun Cho , Soon Woo Han , Chan Il Park
IPC分类号： G01L3/00
CPC分类号： B06B1/08 , G01H1/10 , G01H11/04
摘要： Provided is a method and apparatus for generating and sensing torsional vibrations using magnetostriction, in order to perform modal testing on a bar, a pipe, a shaft, a beam, or the like. The apparatus includes a torsional vibration generating part transmitting torsional vibrations to a test part having an arbitrary cross-section and a predetermined length, and a torsional vibration sensing part sensing the torsional vibrations generated from the torsional vibration generating part. The torsional vibration generating part and/or the torsional vibration sensing part includes a magnetostrictive body attached around the test part and made of a magnetostriction material, a first magnetic field forming part forming a magnetic field around the test part in a circumferential direction of the magnetostrictive body, and a second magnetic field forming part forming a magnetic field to the magnetostrictive body in a direction substantially perpendicular to the direction of the magnetic field formed by the first magnetic field forming part and in parallel with a longitudinal direction of the test part.
摘要翻译：提供了一种用于使用磁致伸缩来产生和感测扭转振动的方法和装置，以便对杆，管，轴，梁等进行模态测试。该装置包括向具有任意横截面和预定长度的测试部分传递扭转振动的扭转振动产生部分和感测由扭转振动产生部产生的扭转振动的扭转振动感测部分。扭转振动产生部分和/或扭转振动感测部分包括附着在测试部分周围并由磁致伸缩材料制成的磁致伸缩体，第一磁场形成部分在磁致伸缩体的圆周方向上形成测试部分周围的磁场主体和第二磁场形成部，其在与第一磁场形成部形成的磁场的方向大致正交的方向上与磁致伸缩体形成磁场，并与测试部的长度方向平行。

2. 发明授权

US07215118B2 Transducer for generating and measuring torsional waves, and apparatus and method for structural diagnosis using the same 有权
标题翻译：用于产生和测量扭转波的传感器，以及使用其的结构诊断的装置和方法
公开(公告)号：US07215118B2
公开(公告)日：2007-05-08
申请号：US10958590
申请日：2004-10-06
申请人： Chan Il Park , Seung Hyun Cho , Soon Woo Han , Yoon Young Kim
发明人： Chan Il Park , Seung Hyun Cho , Soon Woo Han , Yoon Young Kim
IPC分类号： G01N27/82
CPC分类号： G01N27/82 , B06B1/08
摘要： 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.
摘要翻译：公开了一种用于结构诊断的方法和装置，其在具有任意横截面（例如圆形横截面）的轴，梁或管上产生扭转波，并且通过分析反射波来感测裂纹的存在或位置。磁致伸缩换能器包括多个铁磁条，其附接在具有固定倾斜度的任意横截面的构件的圆周周围; 设置成围绕所述铁磁条的第一壳体，所述第一壳体由绝缘材料制成; 并且线圈将围绕第一壳体。当电流被提供给线圈时，磁致伸缩传感器可以在构件上产生扭转波，并且可以测量反射的扭转波。

3. 发明授权

US07742616B2 Electromagnetic acoustic transducer for generating and measuring bending vibration in rod member using anti-symmetric magnetic field structure 有权
标题翻译：用于使用反对称磁场结构产生和测量杆构件中的弯曲振动的电磁声换能器
公开(公告)号：US07742616B2
公开(公告)日：2010-06-22
申请号：US11287370
申请日：2005-11-28
申请人： Yoon Young Kim , Soon Woo Han
发明人： Yoon Young Kim , Soon Woo Han
IPC分类号： H04R25/00
CPC分类号： B06B1/04 , G01N27/90 , G01N29/2412 , G01N2203/005 , G01N2291/0421 , G01N2291/0422
摘要： Provided is an electromagnetic acoustic transducer including a main body formed of a non-metal material and having a hollow portion, a magnetic field generation portion generating two magnetic fields parallel to a lengthwise direction of the rod member and in opposite directions to each other, at both sides of the rod member that is inserted in the hollow portion of the main body, and a coil wound around an outer circumferential surface of the main body.
摘要翻译：提供一种电磁声换能器，其包括由非金属材料形成并具有中空部分的主体，磁场产生部分产生平行于杆构件的长度方向并且彼此相反方向的两个磁场，插入在主体的中空部分中的杆构件的两侧以及卷绕在主体的外周面上的线圈。

4. 发明授权

US07140254B2 Apparatus for generating and measuring bending vibration in a non-ferromagnetic pipe without physical contact 有权
标题翻译：用于在没有物理接触的情况下产生和测量非铁磁管中的弯曲振动的装置
公开(公告)号：US07140254B2
公开(公告)日：2006-11-28
申请号：US11002230
申请日：2004-12-03
申请人： Yoon Young Kim , Soon Woo Han , Chan Park, II
发明人： Yoon Young Kim , Soon Woo Han , Chan Park, II
IPC分类号： G01N24/12 , G01N27/00
CPC分类号： G10K9/128 , G01H13/00
摘要： An apparatus for generating and measuring bending vibration in a pipe buried underground or a pipe covered by insulating materials is disclosed. There is provided an apparatus for generating and measuring bending vibration in a non-ferromagnetic pipe without physical contact, comprising: a ferromagnetic strip adhered on a surface of the pipe; a coil wound around the surface of the pipe; two magnets for generating bias magnetic field, applied to the strip and parallel to the strip; a power source for supplying an electric current to the coil; and a measuring unit for measuring variation of voltage across the coil, the variation of the voltage being generated due to a strain according to inverse magnetostrictive effect, the strain being generated due to bending vibration, the bending vibration being generated due to deformation of the strip, the deformation being induced according to magnetostrictive effect as the power source supplies the electric current to the coil.
摘要翻译：公开了一种用于产生和测量地下埋管的管道或由绝缘材料覆盖的管道中的弯曲振动的装置。提供了一种用于在不具有物理接触的情况下产生和测量非铁磁管中的弯曲振动的装置，包括：附着在管的表面上的铁磁条; 缠绕在管表面的线圈; 用于产生偏置磁场的两个磁体，施加到条带并平行于条带; 用于向线圈供给电流的电源; 以及测量单元，用于测量线圈两端的电压变化，由于根据反向磁致伸缩效应的应变而产生的电压的变化，由于弯曲振动而产生的应变，由于带的变形而产生弯曲振动当电源向线圈提供电流时，根据磁致伸缩效应感应变形。

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