[android-developers] Re: Low accuracy of the accelerometer Sensor

2009-07-18 Thread dilit
1. Tried to use event.timestamp instead of System.currentTime Still the same result: device skips some measurements. Many times, this is detrimental to being able to produce an accurate drawing of the phone motion. Some important acceleration peaks are missed. One way to combat this problem may

[android-developers] Re: Low accuracy of the accelerometer Sensor

2009-07-10 Thread keyboardr
I'm not 100% familiar with this aspect of the G1, but I know Nintendo had a similar problem with their Wiimotes. That's why they have the sensor bar set up: they couldn't get their accelerometers to be accurate enough to track position. On Jul 9, 2:23 pm, dilit dmit.lit...@gmail.com wrote:

[android-developers] Re: Low accuracy of the accelerometer Sensor

2009-07-10 Thread newbyca
D, I'm having many of the same issues, though my app is a little different in nature ... i don't know that this will help much, but here's my thoughts so far: - when determining the sample time rate use event.timestamp in your sensor listener callback. you'll see more or less the same results,

[android-developers] Re: Low accuracy of the accelerometer Sensor

2009-07-09 Thread dilit
Just in case, We did calibrate our phones. E.g. My phone's Gravity value is more like 8.7 vs 9.81. While static, the phone's accel values were acceptable. As soon as the phone was in motion, the acceleration (position) data went out to lunch. FYI, marketing = lying 99% of the time. IMO On

[android-developers] Re: Low accuracy of the accelerometer Sensor

2009-07-09 Thread dilit
Sounds like some signal processing/filter math is in order. http://www.cs.unc.edu/~welch/kalman/ Anyone with experience? D On Jul 9, 1:18 pm, dilit dmit.lit...@gmail.com wrote: Just in case, We did calibrate our phones. E.g. My phone's Gravity value is more like 8.7 vs 9.81. While static,