PSN-L Email List Message

Subject: Re: VBB response cont., Piezo Acc.
From: Karl Cunningham karlc@.......
Date: Mon, 31 Jan 2000 11:00:54 -0800

Hi Barry --

It isn't an integrator since the piezo device is a capacitor.  The
combination of the capacitive input and capacitive feedback make it flat
with frequency (above the cutoff of the resistor and C1).  Below this
cutoff, it's actually a derivative function.

Looking at a couple of articles about piezoelectricity, it appears it is a
change in electric polarization with change in applied stress.  On the
surface, I think this would imply it is an acceleration device.  Is there
more to the story?


At 07:59 PM 1/30/2000 -0800, you wrote:
>   It sounds suspiciously like an integrator. If this is the case then maybe
>the output of the short period piezo sensor would be acceleration. I'll
have to
>pull the sensor out of the dust and see if it will work again.


Public Seismic Network Mailing List (PSN-L)

[ Top ] [ Back ] [ Home Page ]

Larry Cochrane <cochrane@..............>