发明名称 |
Sonic Or Ultrasonic Transducer |
摘要 |
A sonic or ultrasonic transducer, which is embodied as a radial oscillator. So that the sonic or ultrasonic transducer can be used at high temperatures, a matching layer is located between the radial oscillator and the atmosphere into which the ultrasonic signals are transmitted The matching layer is made from a material that has a dimensional stability up to a temperature which lies above the temperature at the installation location of the sonic or ultrasonic transducer. Furthermore, the matching layer is selected such that its material-specific coefficient of thermal expansion is greater than that of the materials of a piezoelectric unit and a coupling ring, and that the modulus of elasticity of the material of the matching layer is at least one order of magnitude smaller than that of the piezoelectric unit and/or the coupling ring.
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申请公布号 |
US2007273249(A1) |
申请公布日期 |
2007.11.29 |
申请号 |
US20040573420 |
申请日期 |
2004.09.20 |
申请人 |
ENDRESS + HAUSER GMBH + CO. KG |
发明人 |
ECKERT MANFRED;VOLZ FRANK |
分类号 |
H01L41/04;B06B1/06;H04R17/00;H04R19/00 |
主分类号 |
H01L41/04 |
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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