发明名称 |
dispositivo acústico de medida localizada e sem contato das não-linearidades elástica e dissipativa e da viscoelasticidade |
摘要 |
The disclosure relates to an acoustic method and device for localized, contactless, measurement of elastic and dissipative non-linearities and dynamic non-linear viscoelasticity in a medium subjected to a low-frequency acoustic stress and probed by ultrasonic pulses or wave trains. A device for measuring elastic and dissipative nonlinearities and viscoelasticity of a specimen includes an emitter for transmitting a low-frequency acoustic wave and a receiver to receive said low-frequency acoustic wave, which is capable of creating a low-frequency periodic variation of a hydrostatic pressure in the specimen; a generator to generate high-frequency ultrasonic pulses and a receiver to receive said pulses; and an analysis unit that includes a model for calculating modulations in time of flight and in amplitude of the ultrasonic pulses that are induced by the low-frequency acoustic wave passing through the specimen to quantify the elastic and dissipative non-linearities and the non-linear viscoelasticity of the specimen. |
申请公布号 |
BRPI0910165(A2) |
申请公布日期 |
2015.10.20 |
申请号 |
BR2009PI10165 |
申请日期 |
2009.06.23 |
申请人 |
UNIVERSITE FRANCOIS RABELAIS DE TOURS |
发明人 |
GUILLAUME RENAUD;JEAN-PIERRE REMENIERAS;MARIELLE DEFONTAINE;SAMUEL CALLE |
分类号 |
G01N29/11;G01N29/07;G01N29/34 |
主分类号 |
G01N29/11 |
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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