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    • 5. 发明授权
    • Electroacoustic transducer with mechanical impedance transformer
    • 具有机械阻抗变压器的电声换能器
    • US5635685A
    • 1997-06-03
    • US505163
    • 1995-08-10
    • Pascal TierceJean Laurent
    • Pascal TierceJean Laurent
    • G01V1/40G01V1/02G01V1/52H04R17/00
    • G01V1/52H04R17/00Y10S367/912
    • The transducer comprises for example a block (1) of sensitive elements such as piled piezoelectric disks held up by a stud bolt between two ferrules and a shell (8) all in one piece, that is arranged around the piling with a concave central part (8A) extended on either side by a solid cylindrical part (8 B, 8 C). Two sleeves are arranged at the two opposite ends of the transducer and elastic elements (14) for decoupling them in relation to the vibrating block (1) are interposed. A flexible housing (18) can be placed around the shell (8) so as to insulate from the outside environment the inner volume of the transducer that can be filled with a fluid such as oil. Connecting means allow the vibrating block to be connected to an exciting voltage source. The transducer can be used for the emission of vibrations at sea or in wells and notably petroleum or gas wells for example.
    • PCT No.PCT / FR94 / 01436 Sec。 371日期:1995年8月10日 102(e)日期1995年8月10日PCT 1994年12月9日PCT公布。 公开号WO95 / 16211 日期1995年6月15日换能器包括例如一个敏感元件的块(1),例如由双头螺栓在两个套圈之间夹持的堆叠的压电盘和一个整体的壳体(8),其围绕堆叠布置, 一个凹形的中心部分(8A),其在任一侧由实心圆柱形部分(8B,8C)延伸。 在换能器的两个相对端处布置两个套筒,并插入用于相对于振动块(1)去耦的弹性元件(14)。 柔性壳体(18)可以围绕壳体(8)放置,以便与外部环境绝缘,换能器的内部容积可以填充有诸如油的流体。 连接装置允许振动块连接到激励电压源。 传感器可用于在海上或井内,特别是石油或气井的振动排放。