发明名称 |
OMNI-DIRECTIONAL SHEAR-HORIZONTAL WAVE ELECTROMAGNETIC ACOUSTIC TRANSDUCER |
摘要 |
A transducer is provided. The transducer includes: a permanent magnet unit formed in a form of a circular ring having upper and lower surfaces each having a predetermined diametrical direction width while having a circular through-portion in a central portion of the permanent magnet unit, the permanent magnet unit generating a vertical magnetic flux due to opposite magnetic poles that are formed in the upper and lower surfaces; and a coil wound in a diametrical direction across an area between an inner surface formed by the circular through-portion of the permanent magnet and an outer surface formed by an outer circumference of the permanent magnet and also wound in a circumferential direction of the permanent magnet, wherein the coil comprises a conductive material so that a current is applied to the coil, and when an alternating current is applied to the coil, a direction of the alternating current flowing along the coil and a direction of a magnetic field passing through the coil are orthogonal to each other. |
申请公布号 |
US2016003779(A1) |
申请公布日期 |
2016.01.07 |
申请号 |
US201514676198 |
申请日期 |
2015.04.01 |
申请人 |
Seoul National University R&DB Foundation |
发明人 |
SEUNG Hong Min;KIM Yoon Young |
分类号 |
G01N29/24 |
主分类号 |
G01N29/24 |
代理机构 |
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代理人 |
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主权项 |
1. A transducer comprising:
a permanent magnet unit formed in a form of a circular ring having upper and lower surfaces each having a predetermined diametrical direction width while having a circular through-portion in a central portion of the permanent magnet unit, the permanent magnet unit generating a vertical magnetic flux due to opposite magnetic poles that are formed in the upper and lower surfaces; and a coil wound in a diametrical direction across an area between an inner surface formed by the circular through-portion of the permanent magnet and an outer surface formed by an outer circumference of the permanent magnet and also wound in a circumferential direction of the permanent magnet, wherein the coil comprises a conductive material so that a current is applied to the coil, and when an alternating current is applied to the coil, a direction of the alternating current flowing along the coil and a direction of a magnetic field passing through the coil are orthogonal to each other. |
地址 |
Seoul KR |