iPhone 4 Gyroscope Lateral Motion?

Discussion in 'iPhone' started by Pinksteady, Dec 23, 2010.

  1. Pinksteady macrumors 6502a

    Pinksteady

    Joined:
    Aug 19, 2008
    #1
    Quick question : can anyone confirm for sure if the iPhone 4's gyroscope can accurately detect lateral motion (ie motion purely in a straight line), as opposed to rotational movement?
     
  2. crazytiger86 macrumors 6502

    Joined:
    Aug 30, 2010
    #2
    As far as I know, no.

    A gyroscope by definition is a device for measuring or maintaining orientation. If the iPhone's orientation is the same (i.e. laterally as if moving in a line), it follows to reason that it would not detect it without some other third party help i.e. GPS, and even then, it may not do so "accurately".
     
  3. iUser4Lyfe macrumors 6502

    Joined:
    Jun 15, 2009
    #3
    No Gyroscope can.

    If you find one that can, by definition, it is not a gyroscope.
     
  4. BlackViper macrumors member

    Joined:
    Mar 2, 2010
    #4
    Why not

    It is true that the gyroscope will only measure orientation, the iDevices also have an accelerometer which, when combined with the Gyro, can (as I understand) detect lateral motion(or acceleration that would imply motion). Not sure how accurate a measurement you would get but might be enough for your purposes.
     
  5. Infraggable Kru macrumors regular

    Joined:
    Dec 23, 2010
    #5
    Sorry but this is incorrect

    http://www.youtube.com/watch?v=C6uVrYz-j70

    Gyroscopes measure orientation = deviation from a set angle
    Accelerometer Measures acceleration = deviation in velocity

    Neither of which detects pure Lateral motion

    example
    if you have a phone on a flat table it will not activate the gyroscope
    if you start moving the phone the accelerometer will detect when you start moving it

    but if you maintain a constant speed the accelerometer will zero out, even if you change directions
     

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