DIY Scanning Vibrometer

DJNUBZ · 14th October 2010, 02:11 AM

In this world of people making all sorts of products devices and tools I was wondering if we could design a klippel style scanning vibrometer. If you can DIY a scanning electron microscope why not a klippel. What do you guys think?

davygrvy · 02:50 AM

What's a klippel? This new to me..

whoop... N/M http://www.klippel.de/scanner/default.asp

deathbravo · 15th October 2010, 03:02 AM

ohh...
does it works with a mic matirx

DJNUBZ · 2nd November 2010, 01:37 AM

I'm surprised a few of you haven't jumped in on this.

wakibaki · 2nd November 2010, 02:49 AM

Scanning laser tape measure. Yes, can do this, if somebody funds it. Not dissimilar to a scanning nearfield antenna analyser. Or a scanning anything for that matter. Can probably get away with a dismantled plotter. Or maybe a Sherline CNC mill with a rotary table. Only a couple thousand $$ for the mill. Excite, move, measure, move, measure, move, measure, might be a few little issues... something about a triangulating laser. Predict the SPL at a point r(ro,φ, θ)from the Rayleigh equation? What's the incentive?

w

basreflex · 30th September 2011, 01:23 PM

the vibrometer is the expensive part, the rest is steering, we can use lego or other types of mechanical contruction kits.

Conrad Hoffman · 30th September 2011, 01:30 PM

Ha, you had me going for a second. I've used the optical vibrometers from PI and thought if you can clone one of those, you're a better man than I. The system described shouldn't be hard to do using commercial or DIY XYZ platforms, though I'm not sure an individual constructor could benefit much from the information. It seems best suited to those building drivers from scratch.

basreflex · 30th September 2011, 01:41 PM

I have worked with those laser doppler vibrometer. nice stuff, but expensive.
here's another idea: use laser triangulation, take the optics from a sharp displacement sensor, build a fast readout and use a CODEC with CPLD to do the A/D , division and D/A.
we can use a fast PSD from hamamatsu, sharp, or pacific optics. we do not have the obligation to measure from a distance so triangulation is an option. linearity is OK and resolution can be in the um range.

14th October 2010, 02:11 AM	#1
DJNUBZ diyAudio Member Join Date: May 2003 Location: Chicago	DIY Scanning Vibrometer In this world of people making all sorts of products devices and tools I was wondering if we could design a klippel style scanning vibrometer. If you can DIY a scanning electron microscope why not a klippel. What do you guys think?

14th October 2010, 02:31 AM	#2
davygrvy diyAudio Member Join Date: Mar 2007 Location: Richmond, CA Blog Entries: 1	What's a klippel? This new to me.. whoop... N/M http://www.klippel.de/scanner/default.asp __________________ Think out of the box Last edited by davygrvy; 14th October 2010 at 02:50 AM.

30th September 2011, 01:30 PM	#7
Conrad Hoffman diyAudio Member Join Date: Mar 2007 Location: Canandaigua, NY USA	Ha, you had me going for a second. I've used the optical vibrometers from PI and thought if you can clone one of those, you're a better man than I. The system described shouldn't be hard to do using commercial or DIY XYZ platforms, though I'm not sure an individual constructor could benefit much from the information. It seems best suited to those building drivers from scratch. __________________ I used to be an audiophool like you but then I took an arrow to the knee.

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15th October 2010, 03:02 AM	#3
deathbravo diyAudio Member Join Date: Jun 2010	ohh... does it works with a mic matirx

2nd November 2010, 01:37 AM	#4
DJNUBZ diyAudio Member Join Date: May 2003 Location: Chicago	I'm surprised a few of you haven't jumped in on this.

2nd November 2010, 02:49 AM	#5
wakibaki Banned Join Date: Jan 2008 Blog Entries: 2	Scanning laser tape measure. Yes, can do this, if somebody funds it. Not dissimilar to a scanning nearfield antenna analyser. Or a scanning anything for that matter. Can probably get away with a dismantled plotter. Or maybe a Sherline CNC mill with a rotary table. Only a couple thousand $$ for the mill. Excite, move, measure, move, measure, move, measure, might be a few little issues... something about a triangulating laser. Predict the SPL at a point r(ro,φ, θ)from the Rayleigh equation? What's the incentive? w

30th September 2011, 01:23 PM	#6
basreflex diyAudio Member Join Date: Oct 2007	the vibrometer is the expensive part, the rest is steering, we can use lego or other types of mechanical contruction kits.

30th September 2011, 01:41 PM	#8
basreflex diyAudio Member Join Date: Oct 2007	I have worked with those laser doppler vibrometer. nice stuff, but expensive. here's another idea: use laser triangulation, take the optics from a sharp displacement sensor, build a fast readout and use a CODEC with CPLD to do the A/D , division and D/A. we can use a fast PSD from hamamatsu, sharp, or pacific optics. we do not have the obligation to measure from a distance so triangulation is an option. linearity is OK and resolution can be in the um range.

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