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Is it possible to build a PI machine with the discrimination capabilities of a VLF machine? <font color=#FF0000><i>*N/T*</i></font>
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Hi
I think we soon will see one there is pretty close, watch out for the name "Pulse Devil"
That's about all I can say at the moment.
Mark
I think we soon will see one there is pretty close, watch out for the name "Pulse Devil"
That's about all I can say at the moment.
Mark
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Not a detector with a ferrous/non-ferrous meter system. There is quite a difference.
The Goldquest SS can tell the difference between gold, and iron, but it certainly doesn't discriminate like a VLF detector.
The Goldquest SS can tell the difference between gold, and iron, but it certainly doesn't discriminate like a VLF detector.
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I have heard about such a detector, but have not seen one yet.
Soon I hope <IMG SRC="/forums/images/smile.gif" BORDER=0 ALT="
">
Mr. Bill
Soon I hope <IMG SRC="/forums/images/smile.gif" BORDER=0 ALT="
">Mr. Bill
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Dave,
Making a statement such as that with out any explanation is just tossing loose words randomly, to start a fire.
I can understand confidentiality problems, but if that
Making a statement such as that with out any explanation is just tossing loose words randomly, to start a fire.
I can understand confidentiality problems, but if that
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Hi Richard,
All of the elements are there. PI, being a broadband system has the potential for very good discrimination. The received signal contains a large amount of information about the object in terms of the amplitude, width of the signal, decay time and the form of the decay curve. The Goldscan that I made some years ago was primarily a ground balancing PI, but it could notch out other targets and reject many iron objects. This was done by taking just two signal samples, but by taking more samples and having TX pulses of different amplitudes and widths, the system could be considerably refined.
Whether it is possible to discriminate, identify, reject, at the same ranges as it is possible to do basic detection, is doubtful. Generally speaking a higher signal to noise ratio is necessary to achieve these additional facilities. However, PI has the benefit of being able to transmit more power if needed, so I am confident that greater detection and discrimination ranges could be achieved than with VLF devices.
PI can also be used with balance coil technology and further signal samples taken during the transmitter on time. This is what the PPD1 used for Fe/Non-Fe discrimination. Combine this with multiple signal sampling in the off time and alternate TX widths and on times, and a very versatile detector could result.
Work is going on in all these different areas by engineers and researchers in several different countries, who are co-operating via the Internet. Shouldn
All of the elements are there. PI, being a broadband system has the potential for very good discrimination. The received signal contains a large amount of information about the object in terms of the amplitude, width of the signal, decay time and the form of the decay curve. The Goldscan that I made some years ago was primarily a ground balancing PI, but it could notch out other targets and reject many iron objects. This was done by taking just two signal samples, but by taking more samples and having TX pulses of different amplitudes and widths, the system could be considerably refined.
Whether it is possible to discriminate, identify, reject, at the same ranges as it is possible to do basic detection, is doubtful. Generally speaking a higher signal to noise ratio is necessary to achieve these additional facilities. However, PI has the benefit of being able to transmit more power if needed, so I am confident that greater detection and discrimination ranges could be achieved than with VLF devices.
PI can also be used with balance coil technology and further signal samples taken during the transmitter on time. This is what the PPD1 used for Fe/Non-Fe discrimination. Combine this with multiple signal sampling in the off time and alternate TX widths and on times, and a very versatile detector could result.
Work is going on in all these different areas by engineers and researchers in several different countries, who are co-operating via the Internet. Shouldn
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What's happening with Sean's Ultimate PI?
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Anonymous
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Eric's post 4718 in this thread covered it.
--Dave J.
--Dave J.
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So why to obtain any performance must it handled like T.N.T. Manufactures and retailers must have loved the introduction of LCD because it hid the dead giveaway of the gold and silver lines sweeping from one side of the meter to the other saying you can use discrimination but this is what you can lose. Ringpulls and rings remain indistinguisable and any bit of iron with a hole in it fools the system. Plus little depth,sufficient for the average motion machine but for a high power P.I. ?