Acoustic signature inspection of railroad wheels

Details Acoustic signature inspection of railroad wheels Acoustic signature inspection of railroad wheels

1981-09-17

1983-09-06

Ciarlante, Anthony V.

Measuring and testing

Testing by impact or shock

Specimen impactor detail

73662, G01N 330, G01N 2904

Patent

active

044022107

ABSTRACT:
The disclosure concerns an electromagnetic exciter for striking the wheels of moving railroad cars undergoing acoustic signature inspection. The apparatus comprises a pivotally mounted impact member which is accelerated by a solenoid through only a portion of its impact stroke and then moves onward to impact solely as a result of the kinetic energy imparted to it during the initial acceleration period. The solenoid is controlled by an electronic drive circuit which responds to an input signal from a wheel presence detector and delivers to the solenoid coil a burst of energy whose size and duration may be adjusted to yield the greatest sound pressure level while allowing the field of the coil to relax quickly enough to reset the apparatus for the next car wheel.

REFERENCES:
patent: 2418437 (1947-04-01), Vogt
patent: 2422317 (1947-06-01), Stock et al.
patent: 2721971 (1955-10-01), Francois
patent: 3557603 (1971-01-01), Carr

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