Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!cwjcc!gatech!bloom-beacon!apple!vsi1!wyse!mips!freeptos
From: freeptos@mips.COM (Dan Freitas)
Newsgroups: sci.electronics
Subject: Vibration sensing
Keywords: Vibration Peak Sensor
Message-ID: <10457@obiwan.mips.COM>
Date: 31 Dec 88 18:51:25 GMT
Lines: 22



Does anyone have any ideas for sensing vibration peaks?  I want to  detect
the maximum peak (in a given orientation) of a vibration of frequency ~1-2KHz.
Something like what they use on the dynamic wheel balancers but operating at
a higher frequency.  In the wheel balancer you place the sensor (mechanical
pendulum with contacts or some such) on the swing arm of the car.  The wheel
is spun and the sensor fires a strobe every time the vibration peaks in a given
position around the circle. You then add weight to the opposite side of the 
wheel and presto, a dynamically balanced wheel.

I'm not sure a mechanical pendulum would work so well at 2Khz.  I would think
it might act as the mechanical equivalent of a low-pass filter.

Ideas anyone?
						Thanks,
							Dan Freitas
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