Low End Off the shelf FFT needed
Low End Off the shelf FFT needed
(OP)
<mchenney@mindspring.com>
Looking for low cost off the shelf FFT, microphone input equipment to do limited go-no go testing of small DC gearmotors. Cycle time in 2-5 second range.
Thanks
PS: Also background noise cancelation microphones for front end
Dennis McHenney
mchenney@mindspring.com
<dmchenney@merkle-korff.com>
<mchenney@mindspring.com>
Looking for low cost off the shelf FFT, microphone input equipment to do limited go-no go testing of small DC gearmotors. Cycle time in 2-5 second range.
Thanks
PS: Also background noise cancelation microphones for front end
Dennis McHenney
mchenney@mindspring.com
<dmchenney@merkle-korff.com>
<mchenney@mindspring.com>





RE: Low End Off the shelf FFT needed
RE: Low End Off the shelf FFT needed
You did not say if you wanted the go-no go testing to be automated. Labview would be ideal for that, but the learning curve is steep (especially for non-electrical engineers) even though the graphical interface is supposed to be easy.
You could also design your own FFT analyzer but as I said before the learning curve is steep.
RE: Low End Off the shelf FFT needed
Has anyone ever used a PC sound card and the available share/freeware,or very low cost SW to do this? I know this is an option, but not sure how good it is?
Can an OFF THE SHELF noise cancellation microphone system be used as a front end?
Dennis McHenney
mchenney@mindspring.com
<dmchenney@merkle-korff.com>
<mchenney@mindspring.com>
RE: Low End Off the shelf FFT needed
TI makes the calculator and the CBL (calculator Based Lab)
Vernier Software hase the microphones. Neat little device that I use all the time to monitor and log data ( battery powered, handheld) and a lot cheaper than a PC or laptop.
As you might guess I am one of those that straps system to my leg and hook up an accelerator and ride rollercoasters.
Rich
RE: Low End Off the shelf FFT needed
is boy-ish too:
I have an interest in acoustics and flute playing.
My flutemaker has come up with some new tubes.
He claims that they will produce a better sound
than conventional tubes. I would like to help him
prove this. But how ?
I would like to study vibrating metal tubes somehow
so the quality of their vibration could be studied.
I downloaded a Finite Element Analysis tool only
to learn that it could not handle tubes.
So I put this question here - I know it should
have been a new thread but I couldnt work out
how to start a new thread (!?) - Suppose
I have a head joint mounted on one of these tubes
and make it vibrate. There will be a sound to record,
sure. But what if I want to say something about the
vibration of the tube - in order to be able to
distinguish between tubes manufactured in different
ways (I understand that stretching - or whatever
the English term is ) is an important factor in
tube production.
Any new wild ideas wellcome. Steeno.
RE: Low End Off the shelf FFT needed
is boy-ish too:
I have an interest in acoustics and flute playing.
My flutemaker has come up with some new tubes.
He claims that they will produce a better sound
than conventional tubes. I would like to help him
prove this. But how ?
I would like to study vibrating metal tubes somehow
so the quality of their vibration could be studied.
I downloaded a Finite Element Analysis tool only
to learn that it could not handle tubes.
So I put this question here - I know it should
have been a new thread but I couldnt work out
how to start a new thread (!?) - Suppose
I have a head joint mounted on one of these tubes
and make it vibrate. There will be a sound to record,
sure. But what if I want to say something about the
vibration of the tube - in order to be able to
distinguish between tubes manufactured in different
ways (I understand that stretching - or whatever
the English term is ) is an important factor in
tube production.
Any new wild ideas wellcome. Steeno.