Measuring and testing – Vibration – By mechanical waves
Patent
1991-07-08
1994-01-04
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73588, 73801, G01N 2904
Patent
active
052750507
ABSTRACT:
A flexible mounting (2) having a ring made of elastomeric material (3) fixedly engaged between an inner metal collar (4) and an outer metal collar (5) is mechanically stressed so that it undergoes a gradual elastic deformation corresponding to a relative displacement of 15 mm between the collars in a period of 20 seconds. Acoustic transducers (7) carry out the detection of the acoustic emissions occurring within the mounting itself and caused by structural instabilities arising in the flexible mounting while it is deformed. The acoustic transducers convert the acoustic emissions to electric signals that, after suitable amplification and discrimination, provide a reliable quality evaluation of the mounting being tested.
REFERENCES:
patent: 3924456 (1975-12-01), Vahaviolos
patent: 3946600 (1976-03-01), Rettig et al.
patent: 4317368 (1982-03-01), McElroy
patent: 4538462 (1985-12-01), Hartog et al.
patent: 4549437 (1985-10-01), Weins et al.
patent: 4700577 (1987-10-01), Tripp
Ultrasonics, vol. 27, No. 3, May 1989, pp. 182-185; GB; F. Witos et al.: "Acoustic Emission Investigations of the . . . ".
Mancosu Federico
Schiatti Simone
Ashraf Nashmiya
Pirelli Prodotti Diversificati S.p.A.
Williams Hezron E.
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