I think what you say make more sense in terms of Newtonian mechanics. There is a huge difference then: recalling that accelerometer measures acceleration (and not absolute velocity) it means that we cannot measure relative speed of phone to car because the phone is not accelerating. It's just there stable because of its mass (inertia).
A solution might be to look at the problem in a different perspective. If your guess about how this works is true then we might actually need to intensify phone movements by a product of device mass (as these movements are results of force of our hand which is moving up and down with the car) Unfortunately I don't have an Ubuntu compatible smartphone to test any of these. I will try to do a prototype on Android but Java is not really my thing so it will take some time. 2015年8月5日(水) 23:13 Robert Schroll <rschr...@gmail.com>: > On Wed, Aug 5, 2015 at 12:51 PM, Arash <aras...@gmail.com> wrote: > > Many people feel a little dizzy or nauseous when reading on a train > > or car. This happens because your eyes see that the phone (or book) > > moves up and down but your body doesn't feel that movement. > > I think you have that backwards -- your ears are indicating > acceleration but your eyes are showing that nothing's moving. This is > why looking out a window helps. You see the same motion that your ears > have been sensing. > > Nonetheless, the same sort of solution might be available. The desire > is the same: to get the screen to indicate the same motion your ears > are detecting. I wonder what the relevant frequency range is. My WAG > is that the 0.1 Hz to 10 Hz range would be the worst. Lower than that, > it's essentially constant. Higher than that and it's vibration (and > your phone hand is probably moving anyway). This would set the > timescale at which we can re-center the image. If my guess is correct, > it'd be tens of seconds, which might be annoying. > > The good news is that you don't need to implement this as a system > service to test if it works. You can just write an app that displays > some text or image and applies some correction, and then stare at it > during your commute to see if it helps. > > Robert > > > >
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