发明名称 |
Device and method for measuring thickness |
摘要 |
A device for measuring thickness of an object has a vibration generator for generating vibrations in the object, a vibration detector for detecting vibrations generated in the object by the vibration generator and a frequency analyzer for calculating resonance frequency of the object. The vibration generator includes a light-emitting part which emits light towards the object to irradiate and to be absorbed by the object. A plurality of vibration detectors may be used and the frequency analyzer may include a sound speed analyzer for calculating speed of sound inside the object from vibrations detected by these plurality of vibration detectors.
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申请公布号 |
US7204146(B2) |
申请公布日期 |
2007.04.17 |
申请号 |
US20060368095 |
申请日期 |
2006.03.02 |
申请人 |
TECHNO NETWORK SHIKOKU CO., LTD. |
发明人 |
ISHIMARU ICHIRO;OKUDA TAKAHIRO |
分类号 |
G01B17/02;G01N29/46;G01B11/06;G01N29/00 |
主分类号 |
G01B17/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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