Accelerometer mounting methods
Accelerometer mounting methods
(OP)
Can somebody point me to literature showing the accuracy of using various mounting methods such as beeswax, dental cement, stud, cyanoacrolate, etc. I found one from endevco but there must be more out there. I'm probably not using the right search terms in google.





RE: Accelerometer mounting methods
M
--
Dr Michael F Platten
RE: Accelerometer mounting methods
I found the dytran one already and it does not give numbers. The second one from MMF does not give specifics on the types of adhesives used. It only says "adhesives" but that can be any number of things.
I'd like to find actual % deviation for specific methods.
RE: Accelerometer mounting methods
http://co
Ted
RE: Accelerometer mounting methods
http://www.endevco.com/resources/tp_pdf/TP312.pdf
Ted
RE: Accelerometer mounting methods
Results form a welded steel frae will not read across to an aluminium casting, for example.
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Accelerometer mounting methods
Slide #4
Dave G.
www.ReliabilityDirectStore.com
RE: Accelerometer mounting methods
I did do the work myself. That's the reason I'm looking for some numbers out there... for a sanity check of my work. I have the % difference between a stud mounted reference accelerometer and the test accelerometer for CA, CA with mesh, CA with kapton, CA with mesh and block, Dental cement, and beeswax.
This must be one of the simplest and most tested processes in the world of vibrations so I can't believe there's nothing else out there. I guess I'll start contacting the accelerometer companies directly to see if they have any more technical papers not on the web.
RE: Accelerometer mounting methods
At some point the thickness of the adhesive often gets real important. I'd kind of expect that adding "stuff" like kapton or mesh would be springy compared to CA with minimal bond line and pull down the frequency limit.
Back when B and K was here in Marlboro(ugh) Massachusett they did not hesitate to plonk general purpose (for machine diagnostics) accelerometers to the test shaker with beeswax. I guess I know why.
RE: Accelerometer mounting methods
Up to 2000 Hz, the added "stuff" to the CA only increased the error by tenths of a percent. Dental Cement was the most accurate and the surprising thing for me was that beeswax was almost as good.
RE: Accelerometer mounting methods
Seems like another instance when damping is really only necessary or even desireable when resonance is close enough to get involved and make trouble.
RE: Accelerometer mounting methods
Higher frequencies are lost in a poor mounting.
If you use an adhesive, be sure to have a thin film.
RE: Accelerometer mounting methods
See the B&K tutorial on accelerometers.
RE: Accelerometer mounting methods
Jim Kinney
Kennedy Space Center, FL
RE: Accelerometer mounting methods