Hi there, Im gls and I just registered. Sorry for my english. Im thinking about a sort of linux laptop converted in a vlf metal detector using GnuRadio and is internal soundcard connected to a coil/sensor and if necessary a preamp... Do you know of someone that have tried this experiment? Can you help me with suggestion, link, code or whatever? Thanks in advance, excuse me for the strange question. I hope to receive help :)
on 2007-06-25 19:27
on 2007-06-26 00:34
Hi, Check : http://www.nuggethunting.com/detector_technology.htm I Think most of these technologies can be exploited with USRP + [LFTX DC-30 MHz Transmitter & LFRX DC-30 MHz Receiver] daughterborads. Firas Giuseppe Luca Scrofani wrote: > > _______________________________________________ > Discuss-gnuradio mailing list > firstname.lastname@example.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://www.nabble.com/GnuRadio%2C-VLF%2C-Metal-Det... Sent from the GnuRadio mailing list archive at Nabble.com.
on 2007-06-27 23:38
Thanks Chris, and the idea of a coils array is great! Thanks for the link Eng. Firas :) My idea is to generate 100 pulses at 6000 Hz per second for a duration of 1/200 second (this values are not absolute and it should be easily changed). Betwenn pulses, the script have to "switch" from this "transmission mode" to "receive mode", registering through an antenna + amplifier the presence of signal from the eddy current generated in the metal objects during the tx. If there is a "bouncing" signal, there is metal, if not, nothing to dig :D A simple sound card in my opinion can manage this freqs. Therefore: TX every second from a gnuradio .py script 100 pulses its generated, this signals from the aux line is first externally amplified, then transmitted from a coil/antenna RX 100 times every second after every pulse the same script, from another amplifier and coil/antenna connected to mic in line, analyze the radiowaves in search of a 6000 Hz "bounce" What do you think? Can you help me with the base of the code for a quick start? I'll share my achievements PS: Sorry for my english :D