Dynamic ultrasonic resonance testing

Details Dynamic ultrasonic resonance testing Dynamic ultrasonic resonance testing

1997-06-23

1999-07-13

Chapman, John E.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

73602, G01N 2912

Patent

active

059229560

ABSTRACT:
Relevant resonance response characteristics of a sample are determined for use in characterizing the sample for non-destructive testing. The sample is excited by an exciting mechanical input at a plurality of ultrasonic frequencies. The response is separated into in-phase and quadrature components and the resonance response characteristics are computed from the in-phase and quadrature components. Apparatus for obtaining the relevant response characteristics includes a frequency generator for inputting an exciting ultrasonic frequency to the sample. A transducer outputs a response of the sample to the exciting ultrasonic frequency. A dynamic signal analyzer is connected to receive the response of the sample and to output in-phase and quadrature components of the response of the sample. A computer then determines the relevant response characteristics from the in-phase and quadrature components.

REFERENCES:
patent: 4322806 (1982-03-01), Allison
patent: 4976148 (1990-12-01), Migliori et al.
Hewlett Packard Signal Analyzers, Model 3582A, 1986 Catalog, pp. 701-702.

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