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Method and apparatus for impact-type inspection of structures

  • US 5,048,320 A
  • Filed: 11/07/1989
  • Issued: 09/17/1991
  • Est. Priority Date: 08/28/1986
  • Status: Expired due to Term
First Claim
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1. Apparatus for impact-type inspection of structures, comprising:

  • a hammer having a hammer head and a sensing means for sensing impact force or deceleration, said hammer head being disposed at a leading end portion of said hammer;

    a hammer driving member which includes a hammer driving means for driving said hammer from a return position against an object to be inspected so as to apply a non-destructive impact force to the object to be inspected, and said hammer driving member including a return means for driving said hammer back to said return position; and

    means receiving the output of said sensing means for sequentially actuating said hammer driving means, deactuating said hammer driving means when an output signal is received from said sensing means, and calculating a waveform characteristic of said signal.

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