Comments on: Gravity and Device Orientations

By: Michael

Michael — Fri, 19 Aug 2011 09:00:41 +0000

I would like to know how to determine the values of motion when using the seismometer. In short, how can I, by reading the wiggly x,y,and z lines, determine if ground motions are stronger up & down as opposed to left & right?

By: kiichi

kiichi — Thu, 04 Aug 2011 20:40:02 +0000

yes, if your phone is facing up, you will get +1 on z-axis and if you flip the phone, you will get -1 on z axis.

By: Anton Vogelmann

Anton Vogelmann — Thu, 04 Aug 2011 13:05:09 +0000

Great app, am I right, when high-pass-filter is ON, the raw data you get out are in units of g, and not in [m/s^2].

By: Engineer

Engineer — Wed, 24 Nov 2010 03:02:38 +0000

Nice app, fun but could be very useful. If it had the following, I’d pay for it!
Frequencies less than 1 Hz. I want to use it to measure the natural period of some of the bridges we have designed – I’d like to see (say) 0.25 Hz (4 seconds) if possible.
Clear values on vertical axes. I see what it is from the examples, but it would be great to see the values on the vertical scales. Also…
If the vertical scale could be set. For example, one might like to see full scale at (say) 0.1g, or 1g.
Possibly a simple screen capture. Maybe a setting such that it takes a screen capture just before re-freshing (I want to capture the spectra).
Possibly some of this is there – just started exploring it. With a bit more function you could sell this to engineers in many firms, many state DoT’s, several disciplines, etc. Try it!
This app is no toy, but if it was slightly more functional you could make some money to fund your research. Or hobbies.

By: Mario Trujillo

Mario Trujillo — Tue, 10 Aug 2010 17:42:02 +0000

I did a short virtual instrument in LabVIEW for capturing the UDP stream data.

It uses the UDP Open.vi and then the UDP Read.vi in a loop

My plan is to use the Iseismometer for measuring the value of g in my bed

thanks for your nice program.

By: - ObjectGraph Blog

- ObjectGraph Blog — Sun, 18 Jul 2010 19:10:25 +0000

[...] Check the article from here : Gravity and Device Orientation [...]

By: iSeismometer » How Gravity Affects on iPhone and how iSeismometer extracts the data

Sun, 18 Jul 2010 06:16:45 +0000

[...] [...]