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To all interested parties:
<p>Acceleration fundementals defined:
<p>Accelerometers measure acceleration, vibration, and shock. An accelerometer
involves the mounting of a seismic mass attached to a damper and a spring
inside a solid casing. The movement of the mass inside the casing is proportional
to the force of acceleration on the device. Many accelerometers use either
a capacitive or piezoelectric sensor to measure the position of the mass.
Accelerometers are specified by the range, frequency response, and the
sensitivity of the device.
<p> -- Acceleration, vibration, and shock:
<br> 1. output units, mV/g
<br> 2. seismic mass, damper, and spring
<br> 3. second derivative of displacement
<br> 4. capacitive (AC excitation)
<br> 5. piezoelectric (charge amplifiers)
<br> -- Range, frequency response, sensitivity
<p>taken from
<br><a href="http://zone.ni.com/devzone/conceptd.nsf/webmain/C89C742C20C825BA86256B350079F262?opendocument&node=DZ52556_US">http://zone.ni.com/devzone/conceptd.nsf/webmain/</a>
<p>John Delacour wrote:
<blockquote TYPE=CITE>At 1:47 AM -0800 12/19/01, Robin Hufford wrote:
<br>>In the interests of amicable discussion I would have to say
however that
<br>>as the members of this list are at least able to operate computers
and are,
<br>>evidently, literate, it is not likely they misconstrue what
an
<br>>accelerometer is
<br>>or what it can do although in point of fact the motion itself
is not what is
<br>>measured but rather the time rate of change of velocity...
<p>I'm afraid, Robin, that likelihood is very real indeed! It really
<br>does appear that they think it is measuring bodily movement,
<br>fantastic though you and I find that.
<p>JD</blockquote>
<br>
<br>
<p>--
<br>Richard Brekne
<br>RPT, N.P.T.F.
<br>Bergen, Norway
<br><A HREF="mailto:rbrekne@broadpark.no">mailto:rbrekne@broadpark.no</A>
<br><A HREF="http://home.broadpark.no/~rbrekne/ricmain.html">http://home.broadpark.no/~rbrekne/ricmain.html</A>
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