goonerjon

Comments

• Each x,y,z output from the accelerometer will vary with angle of the accelerometer. You could map out the positions you need to know about and record the x,y,z output at each point.  There might be a sine/cosine wave that could also predict any angl…

  in Device Orientation Comment by goonerjon January 2016
• Many thanks Matt, it seems we are approaching it in the correct way: essentially to develop an algorithm to extract start and stop times from the raw data. Will let you know how we get on! Cheers, Jon

  in Acceleration log time delay Comment by goonerjon July 2015
• so...we are logging everything on the device and transferring the data over to the app once the freefall has been completed. We obtain a csv of time and acceleration data. The difference in time from one reading to the next is often 1mS, it can hav…

  in Acceleration log time delay Comment by goonerjon July 2015
• Many thanks again Matt for your reply. Ideally I'd like to be able to measure distance dropped from no more than 3 metres with an error of 1 or 2 cm at most. So from what I've read we need to optimise the settings to enable: 1. The data should be…

  in Acceleration log time delay Comment by goonerjon July 2015
• Matt, Thank you very much for such a detailed description - I'm sure a lot of people will find this useful. We've been able to reduce the measurement error significantly already because of this.  Our performance goal is to measure distance trav…

  in Acceleration log time delay Comment by goonerjon June 2015