Here’s a few days of data - https://wetransfer.com/downloads/f7b674e70603b65305a00ebe1e1bbea520170422113742/b165e7ce17f43ee035264ec3e3ac6bda20170422113742/af863f
Vibration Sensor / train sensor
If you’re saving raw data, you might want to look at writing binary rather CSV data. While I’m pro-plain text, you’d be amazed at the efficiency, and this is not archival data.
Off the top of my head, Python’s pickle will read and write python data structures to files with the utmost of ease. Or you just pack some bytes and append…
Did you guys see that the doors were triggering large spikes?
Hey. Didn’t get a chance to look at this, got busy. Thanks for getting some prepared, I’ll certainly look at it when I have some spare time (hopefully this weekend)
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Interesting project Neil. How does using an accelerometer compare to using these: https://www.coolcomponents.co.uk/en/geophone-sm-24-seismic-sensor.html
Is sampling at higher than 200Hz necessary? What’s the dynamic range at the moment?
This is amusing, I had no idea ghosts had to deal with gravity: https://www.youtube.com/watch?v=j2IFf74zZ7s
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How about detecting much higher frequencies as well? They’ll travel much farther (helped by tied down steel rails perhaps?). Not sure what the rules are on drilling holes and embedding microphones though.
“A team of researchers in Korea has discovered a way to allow sound to pass through walls almost as if they were not there at all”
Read more at: https://phys.org/news/2013-06-percent-walls.html#jCp