Arrangement for testing the material of formed parts

Details Arrangement for testing the material of formed parts Arrangement for testing the material of formed parts

1996-09-11

1998-03-17

Chapman, John E.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

G01M 702

Patent

active

057289379

ABSTRACT:
For a comparative material testing of similar formed parts based on their dynamic behaviour under acoustic excitation vibrations, in order to obtain clear-cut information about the material properties it is necessary to assure constant excitations of the vibration generator and a constant pressing force when coupling this to the object being tested. This is accomplished by using a piezoelectric actuator in an assembly unit with an electromechanical sensor and a coupling element, whereby the excitation voltages of the actuator are monitored and its vibrations passing into the formed part are registered by the sensor.

REFERENCES:
patent: 3307393 (1967-03-01), Kessler
patent: 4479386 (1984-10-01), Beggs et al.
patent: 4519245 (1985-05-01), Evvans
patent: 5365457 (1994-11-01), Madigosky
P. Highmore et al., "Resonance Methods," in Ultrasonic Testing, J. Szilard (ed.), 1982, John Wiley & Sons Ltd.
Development of Piezo-Electric Actuators and Sensors for Electronically Controlled Suspension, JSAE Review, (Jap. Soc. Of Automotive Engineers), vol. 12, pp. 48-52, Jul, 1991.

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