Gravity meter

[Atul Asthana]

Has any one succeeded in building and using a gravity meter? for locating cavities or masses of dense material (treasure) in the ground?

Some patents about simple gravity meters are :
http://www.freepatentsonline.com/result.html?p=5&srch=xprtsrch&query_txt=icl/g01v7+and+abst/(gravity+or+gravitation+or+gravitational)&uspat=on&usapp=on&eupat=on&jp=on&pct=on&date_range=all&stemming=off&sort=chron (http://www.freepatentsonline.com/result.html?p=5&srch=xprtsrch&query_txt=icl/g01v7+and+abst/%28gravity+or+gravitation+or+gravitational%29&uspat=on&usapp=on&eupat=on&jp=on&pct=on&date_range=all&stemming=off&sort=chron)

To get a complete copy of US patent, click on www.pat2pdf.org, fill in the patent no. from the above search (read the instructions on this site), and download the patent document in pdf format. Or log in to freepatentsonline and create an account.

[digital logic]

Very interesting.
Thank you very much.:):)

[Atul Asthana]

Here is a document explaining about the process and use of gravity + magnetic survey.
http://www.em.gov.bc.ca/dl/Oilgas/COG/OpenFile2004_1/OpenFile2004_1.pdf (8.3 MB)

[99thpercentile]

I have done some gravity surveys. We currently have an old Lacoste & Romberg gravimeter. My wish list currently includes a Scintrex CG-5 gravimeter, but since they cost $80,000 and have a one year waiting list I won't be getting it very soon, which is a relative gravimeter. There were three manufacturers of gravimeters until a few years ago. Scintrex, Micro-G and Lacoste & Romberg all merged into one company.

Building a gravimeter is not a simple DIY project. It might be the most difficult geophysical instrument to design and build. The absolute gravimeters from Micro-G are amazing instruments that cost up to $500,000 and take almost a year to build. The gravimeters a measuring a signal that is nine orders of magnitude smaller that the values we normally use (e.g. 9.8 m/s2).

[Atul Asthana]

I absolutely agree about the sensitivity and design difficulty.

However, the problem is : because a good gravity meter is expensive and takes a long time to build, its use is not very prevalent.

So. if people can themselves make one, just sufficient for their purpose, they will start using the GM.

And I think, present day engineering expertise available with the people, is a magnitude better than what was available to the best of the labs half a century ago.

I am sure that with little help from experts like you, interested people will come up with a working model :-)

[J_Player]

And I think, present day DIY expertise is a magnitude better than what was available to the best labs half a century ago.
Can Dell Winders out-perform other gravity sensing devices using methods of a half a century ago?Let me make it clear, I have NEVER claimed, or believed for a moment, that any electronic configurations, and even some non-electronic configurations can be used effeciently as a Meta-Physical Dowsing tool. A simple needle & thread is suffice to me for that purpose :rolleyes:

Best wishes,
J_P