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Title: Ultrasonic differential measurement

A method and apparatus for ultrasonic resonance testing of an object is shown and described. Acoustic vibrations are applied to an object at a plurality of frequencies. Measurements of the object's vibrational response are made simultaneously at different locations on said object. The input frequency is stepped by using small frequency changes over a predetermined range. There is a pause interval or ring delay which permits the object to reach a steady state resonance before a measurement is taken.
 [1];  [2]
  1. (Albuquerque, NM)
  2. (Santa Fe, NM)
Issue Date:
OSTI Identifier:
Quatro Corporation (Albuquerque, NM) LANL
Patent Number(s):
US 5408880
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
ultrasonic; differential; measurement; method; apparatus; resonance; testing; shown; described; acoustic; vibrations; applied; plurality; frequencies; measurements; vibrational; response; simultaneously; locations; input; frequency; stepped; changes; predetermined; range; pause; interval; delay; permits; reach; steady; predetermined range; ultrasonic resonance; acoustic vibrations; frequency change; acoustic vibration; differential measurement; /73/