Homemade Ground Penetrating Radar for Privy hunting

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Rufus

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[attachment=IMG_2247.JPG] Diggers,I have been working on a privy detector for 5 years now and have built pulse induction, ground conductivity, earth resistivity and thermal units. Unfortunately you can not beat GPR. Working on my third GPR system. The first one worked but detected other objects above ground as well because of the unshielded antenna. Second one worked well to about 10 feet but had noise problems and reflection issues. Both could find pits but the third one is using a state of art antenna/reflector and should see to 12 feet with very good resolution. The best part of the unit is I am trying to build it for less than 30 percent of a commercial system; making it affordable. Will keep you all posted and send scans of dug privies and un-dug privies. Karl
 

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Rufus

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Second Unit
 

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Rufus

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Third unit almost finished
 

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Rufus

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Reflector side
 

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caldigs

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I worked with a GPR unit for a few months and found it to be nearly worthless. It did find a few holes, but it certainly missed more than it found. The GPR only found pits that had a lot of metal,bricks, or really shallow trash. Essentially it found the new or shallow pits. Textbook pits with clean caps deeper than 3 feet were not detected by the machine. I have a feeling it will be quite some time before a machine can outperform the basic probe.
 

baltbottles

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So is this just the antenna? And you would still need a laptop and software compatible to this antenna? I'm very interested in this as being an urban digger I have had the chance to dig in many places with several feet of overburden or modern fill that prevent probing. Chris
 

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