Amplitude sorting of oscillatory burst signals by sampling

Details Amplitude sorting of oscillatory burst signals by sampling Amplitude sorting of oscillatory burst signals by sampling

1975-07-30

1977-02-08

Ruehl, Charles A.

Measuring and testing

Moisture content or absorption characteristic of material

328 32, G01H 100

Patent

active

040066258

ABSTRACT:
A method and apparatus for amplitude sorting of oscillatory burst signals is described in which the burst signal is detected to produce a burst envelope signal and an intermediate or midportion of such envelope signal is sampled to provide a sample pulse output. The height of the sample pulse is proportional to the amplitude of the envelope signal and to the maximum burst signal amplitude. The sample pulses are fed to a pulse height analyzer for sorting. The present invention is used in an acoustic emission testing system to convert the amplitude of the acoustic emission burst signals into sample pulse heights which are measured by a pulse height analyzer for sorting the pulses in groups according to their height in order to identify the material anomalies in the test material which emit the acoustic signals.

REFERENCES:
patent: 3713127 (1973-01-01), Keledy et al.
patent: 3784079 (1974-01-01), Spanjer
patent: 3842663 (1974-10-01), Harting et al.

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