Yes, I've been reading about that. But my question was if the values I get directly from the gyroscope, without applying filters of my own, could have some kind of filter (inherent to the sensor) as the values do not present standard deviation, which would be "impossible" without some kind of filter.
On Tuesday, February 12, 2013 8:14:12 PM UTC, Tux wrote: > > It is not impossible but it's complicate to implement the filters. > A simple low pass filter is not enough. To do it right you need to > combine accelerator and gyroscope data. For this purpose you could > implement a complementary or Kalman filter. You find some examples on > the net. Or google for "sensorfusion". > > 2013/2/12 Marta Ribeiro <[email protected] <javascript:>>: > > Well yes that's my doubt, if you say "gyroscope noise and drift will > > introduce errors that need to be compensated for." and i'm not applying > any > > filter of my own, i'm just examining the data directly from sensor.event > and > > they seem not to have any noise or bias, it seems a bit impossible if > the > > tablet does not have some kinf of filter embedded. > > > > I'm I on the right path here? > > > > And thank you for your answer! > > > > > > On Monday, February 11, 2013 6:39:02 PM UTC, Tux wrote: > >> > >> Hi, > >> > >> your measurement are as expected. The gyroscope measures the rate or > >> rotation in rad/s and in stationary state the turn rate is about Zero. > >> > >> > >> > http://developer.android.com/guide/topics/sensors/sensors_motion.html#sensors-motion-gyro > > >> > >> "Standard gyroscopes provide raw rotational data without any filtering > >> or correction for noise and drift (bias). In practice, gyroscope noise > >> and drift will introduce errors that need to be compensated for. You > >> usually determine the drift (bias) and noise by monitoring other > >> sensors, such as the gravity sensor or accelerometer." > >> > >> > >> > >> 2013/2/11 Marta Ribeiro <[email protected]>: > >> > Hi! > >> > > >> > I'm doing a project, and it requires me to analyse the reliability of > a > >> > tablet's sensors. > >> > > >> > I have analysed the gyroscope data when the tablet is stationary, and > >> > the > >> > results are an average of -5.3263 *10^{-7} and a standard deviation > >> > equal to > >> > 0. > >> > > >> > Now this leads me to believe that this sensor has some kind of filter > >> > embedded already, although I can't seem to find any information about > >> > it. > >> > > >> > I appreciate any kind of information regarding this results. > >> > > >> > Thanks in advance! > >> > > >> > -- > >> > -- > >> > You received this message because you are subscribed to the Google > >> > Groups "Android Developers" group. > >> > To post to this group, send email to [email protected] > >> > To unsubscribe from this group, send email to > >> > [email protected] <javascript:> > >> > For more options, visit this group at > >> > http://groups.google.com/group/android-developers?hl=en > >> > --- > >> > You received this message because you are subscribed to the Google > >> > Groups > >> > "Android Developers" group. > >> > To unsubscribe from this group and stop receiving emails from it, > send > >> > an > >> > email to [email protected]<javascript:>. > > >> > For more options, visit https://groups.google.com/groups/opt_out. > >> > > >> > > > > > -- > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to > > [email protected]<javascript:> > > To unsubscribe from this group, send email to > > [email protected] <javascript:> > > For more options, visit this group at > > http://groups.google.com/group/android-developers?hl=en > > --- > > You received this message because you are subscribed to the Google > Groups > > "Android Developers" group. > > To unsubscribe from this group and stop receiving emails from it, send > an > > email to [email protected] <javascript:>. > > For more options, visit https://groups.google.com/groups/opt_out. > > > > > -- -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
