Electronics > Projects, Designs, and Technical Stuff
Seismic Sensors
babysitter:
Subscribe thread.
Just got some people at (A)Schaffenburg Makerspace interested in citizen science, have ordered 3 geophones from ebay, played with 1-20 Hz Sound reception, fired off a email to a nearby visitors mine for seismic setup.
rhb:
I spent my career in reflection seismology as a research scientist and programmer in the oil industry. You will want to get the CWP/SU package. You *might* want SLT/SU also, but it's unlikely to be of much help for your use case. I supported CWP/SU for over 10 years and SLT/SU for 6. I also arranged for SLT/SU to be transferred to Mines.
There is a wonderful wiki archived on the wayback machine of seismicunix.com with lots of usage examples.
Stockwell has retired and moved SU from the CWP site to github.
https://github.com/JohnWStockwellJr/SeisUnix/wiki
R. T. Clark has been the main equipment broker in the US for 30+ years.. I bought a 3 axis geophone from them 8-10 years ago for around $135. I don't happen to see it on their website at the moment, but not much to them. Plastic box w/ 3 spikes and 3 geophones inside.
Exploration seismology is very nearly on its death bed., so used land survey gear should be very cheap.
https://rtclark.com
*Everything* effects the response. Topography is particularly difficult to deal with as it produces strange raypaths.
The most important question is what do you want to do? Hobby science is easy. Using multiple sensors to detect someone walking in the yard is a whole different ball game.
Exlporation geophones have poor low frequency response. So if you're interested in earthquakes they are not suitable.
If you live somewhere reasonably quiet building a LaCoste-Romberg vertical and a pair of orthogonal horizontal axis seismographs would make an interesting project. Most of the cost would be in mounting the units solidly.
Using ambient noise as the source is called "seismic interferometery". I never understood that naming. But it stuck.
vindoline:
I don't know if it's the same thing, but Charles Wenzel has been experimenting with infrasound recently. He has lots of info, including diy microphones at his site: http://www.techlib.com/area_50/infrasound.htm
cdev:
This is also an amazingly cool program thats super useful in the time/frequency domain as a fine grained spectrum analysis tool.
https://www.qsl.net/dl4yhf/spectra1.html
radioactive:
--- Quote from: mark03 on January 06, 2019, 03:14:41 am ---The classic amateur long-period design, of amazing simplicity, is Lehman's "garden gate" seismometer from the Amateur Scientist column in Scientific American, July 1979. Speaking from experience, this is an excellent gateway drug 8) For a really serious, vertical broadband design with force feedback, google "FBV seismometer"; sadly there has never been a proper web site designed for this but several of the builders have nice pages describing theirs, e.g. http://www.groundmotion.org/main.html. The "Yuma" is the most recent design for home builders and competes favorably with professional instruments costing tens of thousands of $$.
--- End quote ---
The Yuma FBV design and related looks really amazing. Thank you for the information and links. That helps a lot.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version