07:43 Jun-16-1999 S.G.N.Murthy R & D Structural Engineering Research Centre, India, Joined Oct 1999 1
Ultrasonic Pulse Velocity measurement on Vibrating Structures
What is the effect of ultrasonic pulse velocity measurement on concrete structures when they are vibrating due to the machinary operating. How does the waves produced by the vibrating system affect ultrasonic pulse transit time measurement. I would like to have any relevant details to solve the above problem S.G.N.Murthy Scientist Structural Engineering Research Centre Tharamani Madras India - 600 113 Email : elcA@cssercm.ren.nic.in email@example.com
Re: Ultrasonic Pulse Velocity measurement on Vibrating Structures The affect is depending on the acoustic spectrum of the emissions caused by the vibrating machine. If the signal to noise ratio is so good, that the received pulse can be clearly detected, there is no affect to the measurements. Otherwise I would propose to send a Barker-code modulated sequence of sinusoid bursts and use a correlation algorithm for detecting the modulated signal out of the noise. This is a method for increasing very much the measurement reliability.