I have sensor measuring a distance to a rotating disk. Later on I want to use these values to produce some results like the range of the values.
What options do I have to improve accuracy and precision of the results?
Things I've come up so far:
- rotate the disk several times and combine the "duplicate" values (i.e. that measure the same point on the disk) e.g. by using the mean value. If I remember correctly I could expect up to $\sqrt n$ times better values given $n$ rotations (according to $standard\ error = \frac{standard\ deviation}{\sqrt{sample\ size}}$).
- rotate slower to get more precise measurements
- rotate slower to get more samples per turn (could also be factor $\sqrt n$ here)
- repeat the overal measurement several times and combine the results. Possibly another factor $\sqrt n$?
No options are:
- additional sensors
- different sensor
- modify the enviroment (control temperature, air circulation)
- linearization of the sensor
Are there any other options you know of?