Method and apparatus for impact-type inspection of structures
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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Abstract
A method of inspection of structures in which a hammer capable of imparting a non-destructive impact to an object to be inspected and provided with a pressure sensor or an acceleration sensor is hit against the object and, from a signal then put out, a processed signal of the time during which the hammer is in contact with the object or of the waveform signal during such time is displayed, apparatus provided with a signal processing device for the measurement of the above time, and apparatus provided with a device for removing an impact driving force responsive to a signal put out when the hammer contacts the object, for the measurement.
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Citations
9 Claims
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1. Apparatus for impact-type inspection of structures, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification