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  • #1

    Patent 5,506,506

    I am looking for a "Patent" thread but I did not found it.
    Please, moderator, move this post to the correct place if I am in the wrong place.

    I would like to understand how work exactly the patent in the title.
    I have read it but many informations are hidden from microprocessor section.

    Can you help me?
    Thank you in advance.
    Tags: None
  • #2
    There is no thread dedicated to patents.
    For everyone else, here's the patent in question ->
    US5506506A - Metal detector for detecting and discriminating between ferrous and non-ferrous targets in ground - Google Patents
    http://www.google.co.uk/patents/US5506506
    A metal detector apparatus and a metal detection method for detecting and discriminatory interrogating a metal target buried in the ground. The detector includes a transmitter for providing a first varying magnetic field including at least two frequency components and a receiver for providing a resultant voltage dependent upon a second magnetic field resulting from the combined effects of the ground and metal targets buried in the ground, upon the first alternating magnetic field. The detector samples at least three voltage measurements of the resultant voltage over three different time periods to provide three sampled values which are then processed by a microprocessor to provide three average ground balanced signals from which at least two ratios are calculated and compared against a pre-defined response. The method of detecting and discriminating between metal targets includes providing a first varying magnetic field having at least two frequency components and receiving a resultant voltage dependent upon a second magnetic field resulting from the combined effects of the ground and metal targets buried in the ground, upon the first alternating magnetic field. The resultant voltage is sampled and processed over three different time periods to provide three average ground balanced signals from which at least two ratios are calculated and compared against a predefined response. This comparison is used to distinguish between ferrous and non-ferrous metals.

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    • #3
      Where is possible to found more informations?

      Comment

      • #4
        And here:
        404 Error
        http://www.geotech1.com/pages/metdet/patents/US5506506.pdf

        Comment

        • #5
          Originally posted by MaverickITA View Post
          Where is possible to found more informations?
          yes, it is Clone of Andy Fiodoroff,,, yes, it was used... but how used not possible to know because Andy does not give THE source code. (((

          Comment

          • #6
            CHANCE PI CIRCUIT DIAGRAM NEEDED - Geotech Forums
            http://www.geotech1.com/forums/showthread.php?20866-CHANCE-PI-CIRCUIT-DIAGRAM-NEEDED/page3&highlight=US5506506
            General tech discussions on all types of metal detectors: VLF, 2-box, BFO, off-resonance, PLL, etc. Questions, ideas, and anything else that moves you.

            post number 70.

            Comment

            • #7
              Originally posted by kt315 View Post
              http://www.geotech1.com/forums/showt...ight=US5506506
              post number 70.
              I know Chance circuit and the source code is missing.
              But I am not interested to the circuit but to the patent.

              I would like to understand it how works at 100%.
              The patent tell something but I do not have the knowledge enough to understand it totally.
              I hope to fill this gap in the future.

              Comment

              • #8
                Originally posted by MaverickITA View Post
                I know Chance circuit and the source code is missing.
                But I am not interested to the circuit but to the patent.

                I would like to understand it how works at 100%.
                The patent tell something but I do not have the knowledge enough to understand it totally.
                I hope to fill this gap in the future.
                I think that I have understood how it works.
                But I think also that it is too complex to write a similar software.
                Can be in the future I will lost a lot of time doing some experiments...

                Comment

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