AVR-Chat

I worked at an accelerometer transducer company once.   We were  
looking for accuracy over time and discovered why there was a shift  
over time....   We were able to measure the slight inclination of New  
Jersey tilting over it's water table with the phase of the moon!....

Is that accurate enough?  :-)

FYI:  Schaevitz Sensor (Now Measurement Specialty) has most of their  
inclinometers available through standard vendors like Mouser.

BTW:   Some of the toy robot angle sensors are actually MSI sensors.

Regards,

Eric Linn Rabinowitz  N6LG






On Dec 2, 2008, at 1:34 PM, Richard wrote:

Hi everybody I have been hanging around here for a while, great forum.
Do any of you have any experience with accelerometers? I am thinking of
a project using an accelerometer to measure angles. The idea is this:
the accelerometer will be on the outer edge of a wheel. As the wheel is
turned the position of the accelerometer will move then using a bit of
grigonometry I can calculate the angle that it has moved through. My
question is how much accuracy can I get. I will be looking to measure
fractions of a degree on the wheel aprox 4 inches or 100mm in diameter.
Doing the maths gives a movement of about .88mm/degree so I would like
to be able to detect movement of about 0.2mm is this realistic?
Cheers Rich