Dear Friends, I am currently looking for a cheap Laser Vibrometer to measure ultrasonic vibrations upto ideally 2MHz. I know Polytech have a line of laser vibrometers but unfortunately its out of my budget. Currently i am using AE (acoustic emission sensor) to measure vibrations upto 2MHz but due to the size of the sensor i am unable to attach it directly to the test specimen which in my case is a steel rod embeded in concrete and hence i am using an attachment fixed to the rod and the sensor placed on this attachment.
Does anyone have any suggestion on any type of noncontact measurement which operates in a wideband (upto 2MHz or more) such as noncontact ultrasonic transducers or magnetostrictive sensors or EMATs? My budget is approximately $2000.
Is there any Laser measurement system or something that can be fabricated to measure these high and wideband frequencies using lasers? I read in previous posts where someone mentioned that its quite easy to fabricate a laser based vibration measurement system...but i am quite sceptical on the accuracy.
Thanking you in advance for your time and any comments are much appreciated,
best regards, Ravi