search

jvoermans / Vibration_Logger

Logger to measure sea ice vibrations
3 stars 1 forks source link

calculating geodphone statistics #25

Closed jerabaul29 closed 3 years ago

jerabaul29 commented 3 years ago

@jvoermans this is with reference to #24 .

I wonder if an option may be to deploy in Svalbard, deploying 1 geophone box very close to an IMU box, putting a rope between the two, and possibly putting both on some styrofoam floats. I think as long as one can use a boat to recover the boxes if the ice breaks that it should be possible to retrieve both. Of course the difficulty is that we would ideally like to have some ice breakup events, which is not guaranteed, but I think even that if this does not happen it will be interesting to see how the signals look like.

I can easily implement the calculation and iridium transmission of:

Anything more that could be of interest?

I should be able to compute this on the fly for all ADC channels without problem. Same for the temperature sensors.

jvoermans commented 3 years ago

Yes that sounds like a good idea. We can add a small float to the geophone (which should be resting on/in the ice, to keep it floating as well. Not sure though how easy it is to arrange a boat short term...

I think for the geophone the mean(X), mean(X**2) and nr>Xmax are the three of interest. We can put threshold 5-10% below 3.3V, but that assumes that there will be no voltage drop to the amplifiers.

jerabaul29 commented 3 years ago

Ok, sounds good!

That should be easy to implement. If I remember well the geoduino output is biased to 0.5 3.3V, so suppose we could have both threshold at 0.2 3.3V and 0.8 * 3.3V maybe?

jvoermans commented 3 years ago

Yes, sounds good :)

jerabaul29 commented 3 years ago

@jvoermans FYI the stats are now added in the Due code. All I need is update the parser on the python side, that will be quite easy :) I hope to get the time to add the parser side tonight.

jerabaul29 commented 3 years ago

The parser has been added. If you want to test some day to double check that everything looks good feel free :) Closing for now, if you have any issue just re-open :) .