accelerometer

The Sensor Fusion video looks great, but there's no code: http://www.youtube.com/watch?v=C7JQ7Rpwn2k&feature=player_detailpage#t=1315s Here is my code which just uses accelerometer and compass. I also use a Kalman filter on the 3 orientation values, but that's too much code to show here. Ultimately, this works ok, but the result is either too jittery or too laggy depending on what I do with the results and how low I make the filtering factors. /** Just accelerometer and magnetic sensors */ public abstract class SensorsListener2 implements SensorEventListener { /** The lower this is, the

I have written a simple Activity which is a SensorEventListener for Sensor.TYPE_ACCELEROMETER . In my onSensorChanged(SensorEvent event) i just pick the values in X,Y,Z format and write them on to a file. Added to this X,Y,Z is a label, the label is specific to the activity i am performing. so its X,Y,Z,label Like this i obtain my activity profile. Would like to have suggestions on what operations to perform after data collection so as to remove noise and get the best data for an activity. The main intent of this data collection is to construct a user activity detection application using

I'm working on a Pedestrian Navigation System on Android. I am currently trying to get the rotation matrix between the 3-axis accelerometer referential and the motion that is applied to the device. Let's say you are walking straight forward with the device in your hand, but the Y axis of the accelerometer (thus the device's Y axis) is not oriented in the same direction as the one you're heading yourself (basically you're holding the device in an awkward way). Then if I want to apply distances (based on step detection), it would be wrong to apply them to the accelerometer referential (which I

is it possible to detect a speed of a car using GPS or accelerometer in android phone ? can anyone give me the road map to implement this ? Yes, it's possible using GPS via object of Location class. There is getSpeed() method in this class. It's very easy to find code of getting location. Check this link for example. 来源： https://stackoverflow.com/questions/4497234/detect-a-speed-in-android

I can use the following code to rotate object using accelerometer. transform.rotation = Quaternion.LookRotation(Input.acceleration.normalized, Vector3.up); But i would like to rotate object like for example screen is rotating - 0, 90, 180 and 360 degrees. How can I do it using Unity 3D? user5819 You can use transform.rotation like this: transform.rotation = new Quaternion(rotx, roty, rotz, rotw); OR You can use transform.Rotate like this: transform.Rotate(rotx, roty, rotz); Documentation for Quaternion Documentation for transform.rotation Example for Rotating screen with accelerometer input:

In a my project I am trying to control a car using data obtained through the accelerometer of an Android device. (Left, Right, Forward, Reverse). Even though I have managed to read values from the accelerometer the readings are subject to frequent changes even the device is in a stable position. Can someone provide me a better way to do this? Following is the code that I have used import android.content.Context; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; public class

How can I get a direction vector representing the direction the back of the device is pointing relative to earth coordinates? For example, if place down on a desk (screen facing up) it should read [0,0,-1] and if held vertically facing north it should read [1,0,0], etc. I know how to calculate it from heading, pitch, and roll, as long as those are relative to earth coordinates. To be clear here I am not looking for angular velocity, but the actual current angle relative to the plane tangent to the earth. So if the device is held vertically and facing north, the angle "alpha" should read 0 or