Invention Grant
US08393224B2 Stress gauge having an acoustic resonant structure and sensor for at least one physical parameter using such stress gauge
有权
具有声学谐振结构的应力计和使用这种应力计的至少一个物理参数的传感器
- Patent Title: Stress gauge having an acoustic resonant structure and sensor for at least one physical parameter using such stress gauge
- Patent Title (中): 具有声学谐振结构的应力计和使用这种应力计的至少一个物理参数的传感器
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Application No.: US12669256Application Date: 2008-07-18
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Publication No.: US08393224B2Publication Date: 2013-03-12
- Inventor: Sylvain Jean Ballandras , Jérérmy Masson
- Applicant: Sylvain Jean Ballandras , Jérérmy Masson
- Applicant Address: FR Paris FR Mougins FR Besancon Cedex
- Assignee: Centre National de la Recherche Scientifique,Senseor,Universite de Franche-Comte
- Current Assignee: Centre National de la Recherche Scientifique,Senseor,Universite de Franche-Comte
- Current Assignee Address: FR Paris FR Mougins FR Besancon Cedex
- Agency: Pearne & Gordon LLP
- Priority: FR0756653 20070720
- International Application: PCT/EP2008/059447 WO 20080718
- International Announcement: WO2009/013235 WO 20090129
- Main IPC: G01L1/00
- IPC: G01L1/00
Abstract:
The invention relates to a stress gauge of the type having an acoustic resonant structure, including a piezoelectric transducer (10) connected to a holder (20), the holder (20) including opposite the piezoelectric transducer (10) an imbedded reflecting portion (40). The imbedded reflecting portion (40) reflects the volume acoustic waves generated by the piezoelectric transducer (10) when it is excited according to a harmonic mode of the structure and propagating into said holder (20), the reflecting portion (40) being arranged at a distance from the piezoelectric transducer (10) such that the integral of the stress on the propagation distance of the volume acoustic waves up to their reflection is different from zero.
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