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Piezoelectric vibration sensor

  • US 7,368,855 B2
  • Filed: 04/07/2003
  • Issued: 05/06/2008
  • Est. Priority Date: 04/08/2002
  • Status: Expired due to Fees
First Claim
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1. A sensor unit for picking up mechanical vibrations, sounds, and ultrasound from a surface of a body, comprising:

  • a piezoelectric foil strip defining a sensor element, said piezoelectric strip having signal wires attached thereto for transmitting electrical signals representing the vibrations, sounds, or ultrasound to be picked up;

    flat support parts for holding only opposite ends of said piezoelectric strip; and

    an engagement strip for engaging the surface of the body to receive vibrations therefrom, and for propagating the vibrations to said piezoelectric strip, said engagement strip being held in said support parts so as to extend in a curved manner along said piezoelectric strip and define a space between said piezoelectric strip and said engagement strip.

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