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2014/10/16 ¤W¤È 08:18:22
android Programming Glossary: magnetometerAndroid getOrientation() method returns bad results http://stackoverflow.com/questions/10192057/android-getorientation-method-returns-bad-results assume that you combine a 3D vector corresponding to your magnetometer with an averaging low pass filter to smoothen the data. Although.. so great verbatim with angular variables fetched from your magnetometer. Why one might ask Because those angular variables azimuth pitch..
Gyroscope Issues with Device Orientation http://stackoverflow.com/questions/14310347/gyroscope-issues-with-device-orientation float fusedOrientation new float 3 accelerometer and magnetometer based rotation matrix private float rotationMatrix new float.. initListeners wait for one second until gyroscope and magnetometer accelerometer data is initialised then scedule the complementary.. function registers sensor listeners for the accelerometer magnetometer and gyroscope. public void initListeners mSensorManager.registerListener..
Convert magnetic field X, Y, Z values from device into global reference frame http://stackoverflow.com/questions/15315129/convert-magnetic-field-x-y-z-values-from-device-into-global-reference-frame the problem in advance. android sensor android sensors magnetometer magnetic share improve this question In my comment on the..
How to use onSensorChanged sensor data in combination with OpenGL http://stackoverflow.com/questions/2881128/how-to-use-onsensorchanged-sensor-data-in-combination-with-opengl matrix 2 buffered version of 1 where both acceleration and magnetometer are buffered 3 buffered version of 1 where only magnetometer.. are buffered 3 buffered version of 1 where only magnetometer is buffered 4 buffered version of 1 where only acceleration..
Different values between sensors TYPE_ACCELEROMETER/TYPE_MAGNETIC_FIELD and TYPE_ORIENTATION http://stackoverflow.com/questions/4174389/different-values-between-sensors-type-accelerometer-type-magnetic-field-and-type Euler angles BTW . Instead it uses accelerometers and magnetometers both of which produce 3 space XYZ vectors. These are used to.. accelerometer produces a vector in the UP direction. The magnetometer produces a vector in the north direction. Note that in the northern.. due to magnetic dip . The accelerometer vector and magnetometer vector can be combined mathematically through SensorManager.getRotationMatrix..
Calculate compass bearing / heading to location in Android http://stackoverflow.com/questions/4308262/calculate-compass-bearing-heading-to-location-in-android a I have calculated north using the sensor values from the magnetometer and accelerometer. I know this is correct because it lines up.. and magnetic north The heading that is returned from the magnetometer accelermometer is in degrees east of true magnetic north 180..
Android TYPE_LINEAR_ACCELERATION sensor - what does it show? http://stackoverflow.com/questions/7858759/android-type-linear-acceleration-sensor-what-does-it-show sensor uses a combination of the accelerometer and the magnetometer. Marginally better results can be obtained using SensorManager's.. in h w on some devices they use the accelerometer the magnetometer on some other devices they use the gyro. On Nexus S and Xoom..
Android getOrientation() method returns bad results http://stackoverflow.com/questions/10192057/android-getorientation-method-returns-bad-results I can see at least 1 problem with this approach of yours. I assume that you combine a 3D vector corresponding to your magnetometer with an averaging low pass filter to smoothen the data. Although such approach would work great for a sensor value which.. such as raw data from accelerometer it doesn't work so great verbatim with angular variables fetched from your magnetometer. Why one might ask Because those angular variables azimuth pitch roll have an upper bound and a lower bound which means..
Gyroscope Issues with Device Orientation http://stackoverflow.com/questions/14310347/gyroscope-issues-with-device-orientation new float 3 final orientation angles from sensor fusion private float fusedOrientation new float 3 accelerometer and magnetometer based rotation matrix private float rotationMatrix new float 9 public static final float EPSILON 0.000000001f private static.. SensorManager this.getSystemService SENSOR_SERVICE initListeners wait for one second until gyroscope and magnetometer accelerometer data is initialised then scedule the complementary filter task fuseTimer.scheduleAtFixedRate new calculateFusedOrientationTask.. TextView findViewById R.id.bank_angle_text This function registers sensor listeners for the accelerometer magnetometer and gyroscope. public void initListeners mSensorManager.registerListener this mSensorManager.getDefaultSensor Sensor.TYPE_ACCELEROMETER..
Convert magnetic field X, Y, Z values from device into global reference frame http://stackoverflow.com/questions/15315129/convert-magnetic-field-x-y-z-values-from-device-into-global-reference-frame everybody who read this post and who post some thoughts about the problem in advance. android sensor android sensors magnetometer magnetic share improve this question In my comment on the checked answer on the link you provided above I referred to..
How to use onSensorChanged sensor data in combination with OpenGL http://stackoverflow.com/questions/2881128/how-to-use-onsensorchanged-sensor-data-in-combination-with-opengl transfaired from the rotation matrix to the modelview matrix 2 buffered version of 1 where both acceleration and magnetometer are buffered 3 buffered version of 1 where only magnetometer is buffered 4 buffered version of 1 where only acceleration.. 2 buffered version of 1 where both acceleration and magnetometer are buffered 3 buffered version of 1 where only magnetometer is buffered 4 buffered version of 1 where only acceleration is buffered 5 uses the orientation sensor and sets the angles..
Different values between sensors TYPE_ACCELEROMETER/TYPE_MAGNETIC_FIELD and TYPE_ORIENTATION http://stackoverflow.com/questions/4174389/different-values-between-sensors-type-accelerometer-type-magnetic-field-and-type it doesn't measure azimuth pitch or roll directly. We call those Euler angles BTW . Instead it uses accelerometers and magnetometers both of which produce 3 space XYZ vectors. These are used to compute the azimuth etc. values. Vectors are in device coordinate.. back on a table with the top of the device facing north. The accelerometer produces a vector in the UP direction. The magnetometer produces a vector in the north direction. Note that in the northern hemisphere this tends to point downward due to magnetic.. Note that in the northern hemisphere this tends to point downward due to magnetic dip . The accelerometer vector and magnetometer vector can be combined mathematically through SensorManager.getRotationMatrix which returns a 3x3 matrix which will map..
Calculate compass bearing / heading to location in Android http://stackoverflow.com/questions/4308262/calculate-compass-bearing-heading-to-location-in-android relative to a destination location instead of north . a I have calculated north using the sensor values from the magnetometer and accelerometer. I know this is correct because it lines up with the compass used on the Google Map view. b I have calculated.. destLocation c declination the difference between true north and magnetic north The heading that is returned from the magnetometer accelermometer is in degrees east of true magnetic north 180 to 180 so you need to get the difference between north and..
Android TYPE_LINEAR_ACCELERATION sensor - what does it show? http://stackoverflow.com/questions/7858759/android-type-linear-acceleration-sensor-what-does-it-show and can only be relied upon when the device has no roll . This sensor uses a combination of the accelerometer and the magnetometer. Marginally better results can be obtained using SensorManager's helpers. This sensor is heavily processed . TYPE_LINEAR_ACCELERATION.. how these are implemented. On some devices they are implemented in h w on some devices they use the accelerometer the magnetometer on some other devices they use the gyro. On Nexus S and Xoom the gyroscope is currently NOT used. They behave as if there..
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