Measuring and testing – Vibration – Sensing apparatus
Reexamination Certificate
2005-05-10
2005-05-10
Larkin, Daniel S. (Department: 2856)
Measuring and testing
Vibration
Sensing apparatus
C073S659000, C073S660000
Reexamination Certificate
active
06889553
ABSTRACT:
A method and apparatus for sensing and measuring stress waves. The method comprises the steps of: a.) sensing motion, where the motion comprises a stress wave component and a vibration component; b.) separating the stress wave component from the vibration component with a high pass filter to create a signal proportional to the stress wave; c.) amplifying the signal to create an amplified signal; d.) processing the amplified signal with a sample and hold peak detector over a predetermined interval of time to determine peaks of the amplified signal over said predetermined period of time; e.) creating an output signal proportional to the determined peaks of the amplified signal; and, f.) repeating steps d.) and e.). The invention also includes an apparatus for implementing the method of the invention.
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Ashton William J.
Fulciniti Nicolas
Illig Mitchell J.
Robinson James C.
Larkin Daniel S.
PCB Piezotronics Inc.
Saint-Surin Jacques M.
Simpson & Simpson PLLC
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