×

Method and apparatus for detecting defects in an object by vibrating the object in a plurality of positions

  • US 5,214,960 A
  • Filed: 04/03/1991
  • Issued: 06/01/1993
  • Est. Priority Date: 04/03/1991
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of detecting a defect in a test object, comprising the steps of:

  • (a) applying vibration to a three-dimensional test object at two positions on a side thereof to vibrate the test object;

    (b) generating a signal representing actual vibrations of the test object;

    (c) converting the signal generated in said step (b) to energy peak data indicative of a natural vibration of the test object and indicative of a defect-induced vibration of the test object when the test object is vibrated at two positions; and

    (d) comparing energy peaks indicative of a natural vibration and energy peaks indicative of a defect-induced vibration to determine whether a defect is present in the test object.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×