wrote in message
...
| Oddly enough, my goals are the same. I intend to retire this spring, and
buy a boat for coastal
| cruising. One project I have in mind is a "wave-meter", i.e., a device
which will tell me how high
| the waves are....swells and wind chop. Roll and pitch should be do-able
also.
|
| My approach is the same as below. But, as pointed out in another post,
calibration is the problem.
|

Norm,

There is no calibration problem with the ADXL202. What is a problem, at
least with my application, is insuring that the accelerometer is mounted
perpendicular to the roll and pitch axes. I am attempting to mount the ADXL
on a telescope (not astronomical) to measure the inclination of the optical
axis of the system. After trying to align the accelerometer mrchanically to
the axes, I am now trying to write a routine to compute the off-axisness and
use the results to compensate for the mis-alignment.

To understand the ADXL go to the AMD site http://www.amd.com/us-en/ and
download the ADXL202 data sheets. There are also some app notes that are
interesting.

You might also explore U.S. Digital http://www.usdigital.com/ as they have
an inclinometer that might do the trick. Check out the T6 unit. I have used
their shaft encoder products and am seriously considering the T6.



HTH

Vic

--
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Victor Fraenckel - The Windman
vfraenc1 ATSIGN nycap DOT rr DOTcom
KC2GUI

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