accelerometer

I'm seeing some unexpected readings from the userAcceleration field in CMDeviceMotion. When I look at the raw accelerometer data from CMAccelerometerData, I see that if the iPhone is flat on a table the reading is 1G straight down (1G in -Z axis) and if I drop the iphone (on a soft surface of course) then the acceleromtere reading goes to zero as expected. That's all fine. When I instead use the CMDeviceMotion class, the userAcceleration reading is zero as expected when the iPhone is flat on table. Again this is fine. But when I drop the iPhone and read the CMDeviceManager userAcceleration,

I need to detect android device orientation change without playing manually with sensor data, while keeping activity orientation stick to some orientation onConfigurationChange will not work as will stick my activity to not rotate. Playing around with sensor data to detect the orientation change I consider that as an invention of wheel, as android already does have embedded implementation of the algorithm to detect device orientation change. And from another side the detection of orientation change is not a simple checks like this. public void onSensorChanged(SensorEvent event) { if (event

For example, Location Spoofer gives out a fake location by using the Access Mock Location permission and I can make my device send out a signal that it's present in any place that I desire. In the same way, can I fake the Accelerometer data to mock the various situations that a user can be in? Thanks in advance. Aman Gautam You can use SensorSimulator to simulate acceleration in your android device or emulator ( download link ). Andrei Golubev As i answered in this question: Simulate accelerometer values on a real device You can send the values you want directly from your app, but i am not

I am trying to implement a fitness app that can keep track of the running speed and running distance in Android. It looks like I can either use GPS or Accelerometer to calculate these information. Since a runner may put his phone in hand, on the shoulder or in his pocket, my first intuition is to use GPS to get locations and calculate running speed and running distance. But recently someone telled me that I can also use Accelerometer also does that. My question is: In Android, which approach is better to calculate running speed and running distance, GPS or Accelerometer? I suspect that

Most IBM (and some Dell) laptops have built-in accelerometers to stop any moving parts during a sudden fall, but I was unable to find a standardised Windows API to access this data. I assume that each manufacturer would provide a driver to interface with the sensor. Which popular laptop brands come standard with accelerometers accessible from an API and which libraries should I use to access the data? Does an API* exist to abstract away the differences between different manufacturers? I am aware of the Windows 7 Sensor API, but I would like support for XP and earlier. Most reputable notebook

I am trying to calculate Jerk ( http://en.wikipedia.org/wiki/Jerk_(physics) ) and jounce ( http://en.wikipedia.org/wiki/Jounce ) with the acceleration data from the accelerometer. I think I have Jerk figured out, but I am not sure what I am doing for jounce is correct. Can anyone confirm or deny what I am doing is giving me correct values (Do I need to take into consideration time?) #define kFilteringFactor 0.4 float prevAccelerationX; float prevAccelerationY; float prevAccelerationZ; float prevJerkX; float prevJerkY; float prevJerkZ; - (void)viewDidLoad { [super viewDidLoad];