Title :
A Golay sequencer based NDT system for highly attenuating materials
Author :
White, J.D.H. ; Challis, R.E.
Author_Institution :
UDSP Lab., Keele Univ., UK
Abstract :
In conventional pulse transmission based ultrasonic measurement systems the signal to noise ratio is constrained by the maximum permissible pulse amplitude which may be applied to the transmitter and the thermal noise generated by the receiver amplifier. By exciting the transmitting transducer with a wideband noise source and performing the cross correlation between the exciting noise source and the receiver output an improvement in signal to noise ratio of 40 dB is possible
Keywords :
acoustic signal processing; correlation methods; correlators; test equipment; ultrasonic materials testing; 40 dB; Golay sequencer based NDT system; US NDT; cross correlation; highly attenuating materials; signal to noise ratio; wideband noise source;
Conference_Titel :
Non-Contacting and Remote NDT, IEE Colloquium on
Conference_Location :
London
