it is a traditional machine on which specimen will be rotating.now my question is how to acquire signal from a rotating specimen.
can u suggest me the module.we have national instruments CETRE FOR EXCELLENCE in our college.i was thinking to acquire the strain signal
It is possible to use strain gauges on a rotating specimen if you use slip rings to transfer the signal between the rotating and non-rotating environments. There are also various non-contact measurement methods, such as laser measurement and vision system. It really depends on what details you are trying to measure. Can you describe a little better the equipment you are using and the details of what you need to measure?
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There are also telemetry based systems that have a transmitter mounted on the rotating part and send a signal out using radio waves. But they may be too big for your specimen, and they are also expensive on the order of thousands of dollars.
if i get strain signal from the specimen then i can use labview fatigue analysis tool kit.slip rings is not a possible solution because it arrests the propagation of crack
Can you describe what you are trying to do? What size and shape is the sample? What kind of strain are you trying to measure? Are you trying to measure strain at a single point or all over? Do you just want to know how much the whole bar is bending?
We can't help you if you don't give us enough information to work with. Right now all we know is that it is rotating very fast. Repeating your question over and over again doesn't help.