×

Method and device for detecting damage in materials or objects

  • US 20040134280A1
  • Filed: 10/01/2003
  • Published: 07/15/2004
  • Est. Priority Date: 04/02/2001
  • Status: Active Grant
First Claim
Patent Images

1. A method of detecting damage in materials or objects, wherein the material or object is physically influenced to produce a physical change of the material or object in case of damages therein, characterized in that the material or object is influenced to induce transient slow dynamics in case of damage in the material or object and in that slow dynamics induced material elastic modulus changes are detected by applying a probe signal to the material or object, sweeping the frequency of the probe signal at least twice, before and after physically influencing the material or object, to determine at least one eigenmode of the material or object, and sensing the probe signal in the material or object while physically influencing it, and analysing said sensed signal to determine a transient frequency displacement of the eigenmode as an indication of a material modulus change resulting from a damage in the material or object.

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