Ultrasonic test instrument

Details Ultrasonic test instrument Ultrasonic test instrument

1983-03-28

1984-09-11

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

73602, 73632, G01N 2904

Patent

active

044703066

ABSTRACT:
This invention relates to ultrasonic test instruments using wide-band test probes of different nominal frequencies fo and discloses an arrangement wherein each wide-band test probe of different nominal frequency fo is coupled in circuit with a receiving amplifier having a frequency response V(f). The frequency response of the receiving amplifier is so selected that the product H(f) comprising the spectral distribution S(f) of the transmitter and the frequency response V(f) of the receiving amplifier is substantially constant approximately up the the nominal frequency fo of the test probe and has its maximum value in that range. For the transmitters conventionally used in ultrasonic test instruments, in which the transmission pulse is generated by a capacitor discharge, the frequency response V(f) of the receiving amplifier should have a linear rise of 6 dB/octave up to approximately the frequency fo.

REFERENCES:
patent: 3453871 (1969-07-01), Krautkramer
patent: 4016750 (1977-04-01), Green
patent: 4197750 (1980-04-01), Hassler
patent: 4277978 (1981-07-01), Puckette

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