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Unread 06-04-2005, 11:22
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Re: How to measure low velocity

Quote:
Originally Posted by nobtiba
...ADXRS150's sensitivity is 12.5 mV/deg/s so 0.0049V means 0.0049/0.0125=0.392 deg/s =141.12 deg/hour...
0.392 degrees per second is 1411 degrees per hour. That's a bit more than 15 minutes per revolution, so your 5 minutes per revolution theoretically should be detected as about 2 or 3 counts.

Looking at it another way, 5 minutes per revolution is a little bit more than 1 degree per second. That's a little bit more than 12.5 millivolts, which again should be read as about 2 or 3 counts.

The people responding in this discussion forum are generally concerned with time frames measured in tens of seconds. I don't think many of us will have given a lot of thought to trying to measure angular rate over more than a minute or two.