Method and apparatus for the real-time monitoring of a continuou

Details Method and apparatus for the real-time monitoring of a continuou Method and apparatus for the real-time monitoring of a continuou

1975-09-22

1976-10-19

Myracle, Jerry W.

Measuring and testing

Ductility or brittleness

219121LM, G01N 2904

Patent

active

039863913

ABSTRACT:
Continuous welds are monitored by detecting and processing stress-wave signals emitted from the moving weld area to provide an indication of both the weld energy supplied to the weld area by the welding apparatus, and the development of microcracks in the cooling weld area. According to the present invention, the detected stress-wave signals emitted from the weld area are amplified and filtered to provide excellent signal-to-noise ratios and then applied to either one, or both, of (a) an RMS voltmeter, and (b) a spectrum analyzer to provide an indication of the weld energy supplied to the weld area and the development of cracks in the cooling weld area.

REFERENCES:
patent: 3299250 (1967-01-01), Vilkas
patent: 3865201 (1975-02-01), Haden
herzog, R. E. Forecasting Failures with Acoustic Emission, From Machine Design, June 14, 1973, vol. 45, pp. 132-137.

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