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DEFORMATION DETECTION SENSOR

  • US 20080083285A1
  • Filed: 10/05/2007
  • Published: 04/10/2008
  • Est. Priority Date: 10/10/2006
  • Status: Active Grant
First Claim
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1. A deformation detection sensor comprising:

  • a piezoelectric element which generates an output signal due to a deformation;

    a reference signal input device which inputs a reference signal of a predetermined cycle to the piezoelectric element;

    a first signal extraction device which extracts a first output signal due to the deformation of the piezoelectric element out of an output signal from the piezoelectric element;

    a second signal extraction device which extracts a second output signal due to the reference signal out of the output signal from the piezoelectric element;

    a first evaluation device which evaluates the first output signal extracted by the first signal extraction device; and

    a second evaluation device which evaluates the second output signal extracted by the second signal extraction device.

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