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measuring vibrations > 1Mhz

measuring vibrations > 1Mhz

measuring vibrations > 1Mhz

(OP)

Hello.
I need to quantify the amplitude of some vibration and waves we are experiencing.  They motion is at approximately 1 to 1.5Mhz has an amplitude in the low micrometer to nanometer range.  I understand that this is at the distance*frequency limit for a laser vibrometer.  Other options I would hoping for was an LVDT with a core frequency in the 10Mhz range (generally they work at 1/10th the core frequency), but cant find a vendor that makes one at the frequency.  ?  Has anyone ever used SAW (surface acoustic waves) sensor for this type of application?, they seem to be mostly for chemical detection.  Any ideas?
Thanks
Jim
 

RE: measuring vibrations > 1Mhz

(OP)
how about using a ultrasound transducer in the 1Mhz range as a reciver?  Maybe if the transducer is the proper size relating to the size of the vibration and wavelength?  Is there a way to amplify and calibrate it for recieved ampliutide?   

RE: measuring vibrations > 1Mhz

Jim,
Laser vibrometers can measure out-of-plane vibration up to 1.2 Ghz within a picometer resolution.  Typical applications include ultrasonic transducer, MEMS, SAW filter.
For further info, check the following link: www.polytec.com
Francois

RE: measuring vibrations > 1Mhz

Jim,
Laser vibrometers can measure out-of-plane vibration up to 1.2 Ghz within a picometer resolution.  Typical applications include ultrasonic transducer, MEMS, SAW filter.
For further info, check the following link: polytec.com
Francois

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