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Thread: GPR

  1. #1 GPR 
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    hello every body i'm new here
    i need help from who build a ground penetrating radar
    if some one have schema on necessary component
    thanks for yours help


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  3. #2  
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    1) How deep do you want to go?? the lower the frequency the deeper the penertration but the poorer the resolution. THus there is a trade off.

    It helps to have an idea of of the surface material as well...

    2) Another important question, which type of system? ground contact or airborne ?


    3)How much power do you have available to operate? - ie will it be protable, truck mounted, airborne?

    4)What is your budget for this project?


    5)What manufacturing & test facilities do you have at your disposal?


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  4. #3  
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    hi thanks for reply
    i think for airborne (x-ray) and portable system
    this application is to find treasure (i'm joke may be )
    in fact i went prospectus for water (witch deep)
    for various type of surface
    now budget=0
    i focus first for technical information to make choice
    i have not tools and manufacturing facilities
    after that i'll see
    i went to know type of sensor used
    method used for signal processing
    thanks
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  5. #4  
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    Budget = 0?

    Here's the cheapest solution I could find, most parts from your local dumpster and a couple of free sample beers should do the trick.

    Here's what you do, find a long stick and affix a round door handle to it, place the handle end firmly to you ear with the other end of the stick on the ground. Next you need to get the local deadbeat to drop a large rock on the ground about 10 metres away from you. Listen very carefully and you might hear several clicks in rapid succession, and after a few seconds more some lower frequency 'thuds' doing this in areas where you know the geology will quickly enable your brain to do the processing.

    If you do win the lottery then off to your local college to get a degree in electronic engineering, plus a few books from amazon should get you going. :wink:

    Now forget the xrays! they won't bounce back, either they will penetrate or be absorbed as heat (you need a plate the other side of the target to collect them anyway).

    If I were to try with a zero budget I might start with the guts of an old microwave to (2.4Ghz 1KW) BUT whether you can convert them from continuous to pulsed I'm not sure. You then need some sort of receiver to pick up any reflections, maybe here you could modify a wireless lan receiver. at 2.4 Gigahertz you would not be able to resolve objects below about 10 cm without a huge committment to mathematically processing returned data. All in all having been involved with various types of radar over many years - I'd say use sound waves for any portable system (the essence I have already alluded to).

    Sound (pressure) will penetrate much deeper than any radar - another way is to use the resistance of the ground, even a combination of resistnce and sound waves, these any hobbyist could afford to experiment with as the computing can easily be done using a laptop with a good sound card.
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  6. #5  
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    hi,
    Budget = 0? yes i know. but now i can't implement this solution (i'm a poor men)
    i must realize before that a study (it's me who must do this study to have Budget = 0) to convince some one of the need of this system and then he gives me budget.
    first i went to know if there are a previous project like that( i found many companies that commercialize expensive solution)
    i'm an engineer i had study processing treatment (i must refresh my memory )
    but all of this study was theoretical one without real implementation
    for sound it's adapt to ground contact system( the celerity of sound propagation is better in solid that air) . we must considerate the space between GPR system and ground for airborne.
    i propose x-ray because i see an emission that present the discover of archaeological city with airborne x-ray for deep it's limited

    for amazon i have no money
    i focus for free technical documentation (may be specification if exist)
    some open link will help me

    otherwise it's not a problem
    u give me advice to do . i must do by my self

    I am grateful for your help
    thank friend
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  7. #6  
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    You seem somewhat fixed upon the idea of xrays, although I have not worked with xrays I don't think you can use them in a GPR system. They may well penetrate the ground (depending upon it's structure and water content but again I do not think they can 'bounce off' and be reflected in any usuable form. Traditionally the xray generator and xray detector(target plate) are placed either side of the specimen, this then casts an xray shadow onto the target, (similar to a photographic plate).

    THink of how the x-ray machine in your hospital works a subject is 'lit' with xray radiation a plate is placed under the subject, it is simply not done from just one side.
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  8. #7  
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    hi,
    oh i'm not fixed to x-ray. u have right .
    i research all possible solutions (i know there are system use x-ray but i know that x-ray is dangerous for health and design of this system must respect security condition. in addition the deep ensure by x-ray system is not large)
    for me it can be sound but i must have more idea for others technological solution may be other type of wave to prospection.
    for example i found in the net system use laser (dix300 with 5000 euro) I'm sure that this system is a scam (how laser penetrate ground ????????????)
    thank for all
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  9. #8  
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    I work for a small state of-the-art research facility that is always trying to improve their GPR. They have an innumerable amount of resources available and still have many challenges. This is not a casual armchair project. Any radar project will consume years of your time if you are working on it alone without any greater resource than this forum.

    If you are dedicated to it however, then good luck.

    Oh, and try those "will work for food" signs by the highway exit ramp. I hear you can make a good $20-$40 per day depending on how cute and helpless you look.
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  10. #9  
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    hi,
    i ask simply for information
    and your advice don't help me

    /Oh, and try those "will work for food" signs by the highway exit ramp. I hear you can make a good $20-$40 per day depending on how cute and helpless you look/

    may be this is useful for u . here works don't exist for all (graduated or not) . it's hard for all since many years. so don't be bad-tempered
    all suffer
    it's not a crime to try implementing project. i know i have no money but i still having mind ( to think) and arm to fight.

    good luck for your research
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  11. #10  
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    Quote Originally Posted by a0i0r
    hi,
    i ask simply for information
    and your advice don't help me

    /Oh, and try those "will work for food" signs by the highway exit ramp. I hear you can make a good $20-$40 per day depending on how cute and helpless you look/

    may be this is useful for u . here works don't exist for all (graduated or not) . it's hard for all since many years. so don't be bad-tempered
    all suffer
    it's not a crime to try implementing project. i know i have no money but i still having mind ( to think) and arm to fight.

    good luck for your research
    I didn't mean to appear unhelpful, but I think that without the proper training you would be more efficient doing something else. Learning can take many years, and if you don't have much money, it may not be worth it.

    What type of qualifications do you have? Is finding water necessary for survival, or is there enough water available? Is this urgent? If so, how urgent?

    Answering these questions may help you know what path to take.
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  12. #11  
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    Quote Originally Posted by jammer
    I work for a small state of-the-art research facility that is always trying to improve their GPR.
    Careful, you are begining to write like a Certain Wm McCormack....
    "You are only intelligent IF you are surrounded by fools, so don't mock them..." [HOME200]
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  13. #12  
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    Quote Originally Posted by Home200
    Quote Originally Posted by jammer
    I work for a small state of-the-art research facility that is always trying to improve their GPR.
    Careful, you are begining to write like a Certain Wm McCormack....
    Naaa, I can actually understand what he's saying.
    Pleased to meet you. Hope you guess my name
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  14. #13  
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    Quote Originally Posted by Home200
    Quote Originally Posted by jammer
    I work for a small state of-the-art research facility that is always trying to improve their GPR.
    Careful, you are begining to write like a Certain Wm McCormack....
    I wasn't kidding when I said small, but it's one of the top EE research facilities in the US in the areas of communications and electromagnetics.

    You can check them out here.
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  15. #14  
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    hi,
    u build a real sophisticated GPR system
    relax
    well for me i focus for technical information about kind of sensor used in this domain
    i found theoretical information
    i have some skill about signal processing (theoretical one )
    i want to build simple project using for example sound sensor or else to explore ground. it's a first try which can help me to do more ( i mean raise deep of exploration and not for water only)
    thanks for all
    be relax my friend
    i don't doubt in your qualification
    haha
    simple question how does cost the budget of your GPR research



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  16. #15  
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    Quote Originally Posted by a0i0r
    hi,
    u build a real sophisticated GPR system
    relax
    well for me i focus for technical information about kind of sensor used in this domain
    i found theoretical information
    i have some skill about signal processing (theoretical one )
    i want to build simple project using for example sound sensor or else to explore ground. it's a first try which can help me to do more ( i mean raise deep of exploration and not for water only)
    thanks for all
    be relax my friend
    i don't doubt in your qualification
    haha
    simple question how does cost the budget of your GPR research



    I don't work on GPR myself, but other people at the lab do. The budget for this kind of research can be well over $1,000,000 but that usually pays for a team of researchers for a timeline of more than 1 year. Most of the researchers are students, so they are cheap.

    Keep in mind that this lab is a research lab. They don't build something that's already been done before, they create new and better ways of doing things.

    I recommend looking into some near field approaches of sound waves. Look at the medical imaging approach to ultrasound. Ultrasound uses a relatively inexpensive transducer made from piezoelectric material.
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  17. #16  
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    hello
    Most of the researchers are students, so they are cheap
    i ask this question simply to compare yours research lab with the research lab where i realize my master project
    well i see that we are not on the top or exactly we are at bottom
    $1,000,000
    with this money your lab must have a great equipment and great results
    for me i was lead to use my own money to do this project ( the budget was not so great ) haha
    i'll try medical imagine technique (Ultrasound transducer) but i think that this idea of project is sophisticated and complexed one for a simple technical teaching project may be it's for research one
    well thanks for all
    sincerely
    p.s i'm not an American researcher but i do as i can
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