发明名称 |
Ultrasonic parametric amplifier. |
摘要 |
An ultrasonic parametric amplifier incorporates a duct (4) having rigid cylindrical wall with a periodic inner surface that undulates sinusoidally in an axial direction, and an element (16) for heating the external surface of the wall. The sinusoidal undulations of the periodic inner surface have a wavelength which is about half of the wavelength of the waves of ultrasonic energy propagating through a fluid filling the duct. The waves are amplified by synergistic interactions of the ultrasonic waves with the periodic duct walls when heat is added in a predetermined manner, thereby compensating for the exponential decrease in fluid temperature which would otherwise lead to detuning of the amplifier. <IMAGE> |
申请公布号 |
EP0595572(A3) |
申请公布日期 |
1995.07.12 |
申请号 |
EP19930308472 |
申请日期 |
1993.10.25 |
申请人 |
GEN ELECTRIC |
发明人 |
TERHUNE JAMES HOWARD;KARIM-PANAHI KHOSROW |
分类号 |
G01N29/04;G01N29/12;G10K11/08;G10K11/22 |
主分类号 |
G01N29/04 |
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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