gpr project

[anto22]

nasa development has great designs and very good resolution.
but in wet soil is not allowed to penetrate and 10 cm.
Concrete and sand is great.

[Götz von Berlichingen]

Hello.
very good question.
I dont have of 1ghz adc. I have developed a sample&hold scheme that contains radar itself, it slows down time very fast processes and displays them slowly so they can be visualized by slow adc.
This is actually a radar.

Thank you, now i can understand how its done.
Seems like it works like the NASA CRUX GPR - a smart Design.

[unknowing]

Can anybody explain why 8nS pulse in white ellipse is triangular ?

Thanks!

[anto22]

Hello.
very good question.
I dont have of 1ghz adc. I have developed a sample&hold scheme that contains radar itself, it slows down time very fast processes and displays them slowly so they can be visualized by slow adc.
This is actually a radar.

[Götz von Berlichingen]

have developed two software for this project, one works in sound card, in other com port with adc 8 bit.

Sampling the GPR rx (received) Signal with a Sound Card or through the Com Port (without extra Logic like a FPGA) is just plain impossible.
Your Screenshots look like a 1GHz ADC is running (around 1ns for a Sample).
A Soundcard would need 23us... useless for GPR.

[Krzysztof]

Hi Anto22.
Give a little more technical data and some ideii.
Maybe it is an interesting approach can be applied anywhere else?
You have an interesting cut noise. Good filters in DS card?
It may be developmental ideas.
Congratulations.
Best regards Chris.

[unknowing]

have developed two software for this project, one works in sound card, in other com port with adc 8 bit.

Two software is OK, but why delete it ?

[anto22]

have developed two software for this project, one works in sound card, in other com port with adc 8 bit.

[Götz von Berlichingen]

A GPR with a 44100Hz Sampling Rate ?
Something is wrong here.
I would like to know what kind of ADC is used here,
because the Soundcard wont cut it in the Nanoseconds Range of a GPR.

[unknowing]

before








now







why ?

[mikebg]

Yes, I agree! Unknowing, you are Knowing!

[unknowing]

[mikebg]

Unknowing, you don't know how to rotate image.

[unknowing]

[mikebg]

Are these the same generators ?
Uploaded with ImageShack.us

Unknowing, the black box in the right is not generator, it is receiver
For more information see
http://www.pulsediscriminator.net/index.html
Enjoy!