Freematics Forum

My post says that the maximum magnitude of my acceleration is 0.9*g. The median is around 0.86*g. In other words, my acceleration never reaches g.

@promotor funny. No, it isn't. I suspect you know this, but just in case, technically speaking satellites and spaceships are constantly falling, that's why astronauts (and cosmonauts) on the orbiting space stations are weightless, they exert 0 force on the place they are "standing" on. An ...

According to this post http://freematics.com/forum/viewtopic.php?f=2&t=1982&p=3936&hilit=acceleration#p3936 in order to get my acceleration in the units of m/s^2 I need to multiply it by the following factor: 160(to correct approximation done in original code) * 9.81(value of g)/ 16384 I...

I've been thinking how to go about recovering the actual acceleration from the OBD data. In general, there are four unknowns: 3 Eulers angles and the magnitude of the acceleration. Since I only have 3 measures, a_x, a_y, a_z, there is no way to recover all four unknowns. One way to solve it would to...

@protomor, thank you, it makes perfect sense.
The thing is, I am a data scientist, I just got the data. The actual device is half-way across the world, I only saw it on the computer screen
How stable the device is in the port, does it sway in any direction?

Based on the data we've been collecting the acceleration values contain biases, see the attached picture with the histograms. Specific values for our device are xbias = 30, ybias = -3, zbias = -83 Can you confirm that this is the expected behavior? Are these bias device specific, i.e. if I collect d...

Hi, I have several questions about acceleration. 1. It seems like the data values have biases, specifically xbias = 30, ybias = -3, zbias = -83. Please, see the attached image of the histograms of the three accelerations _after_ the biases have been subtracted. 2. The positive direction of the x acc...

Hello,

This web page http://freematics.com/chart/view.html purports to contain some sample data. However, when I try to view it I get 'data of this type is not available' error message. Is there a way to get a hold of some sample data?

Thank you,

David