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GPS Receiver That Keeps Track Of Location w/o Signal?

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  • GPS Receiver That Keeps Track Of Location w/o Signal?

    I know some cars keep track of the location (for instance in downtown areas where the signal might be lost) using accelerometers (I assume).

    Are there any serial/usb receivers that can do this?

  • #2
    They use gyroscopes and a speed sensor from the ECU AFAIK

    And also AFAIK, there are none that interface with computers unfortunately


    edit: The features called dead reckoning BTW
    2004 G35 Coupe project

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    • #3
      Originally posted by aoLhaTer
      They use gyroscopes and a speed sensor from the ECU AFAIK

      And also AFAIK, there are none that interface with computers unfortunately
      Yeah, I thought that would be the case. If they were available though I don't think they'd be cheap.

      On a similar topic, which receivers are better at keeping a signal?

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      • #4
        I found this
        http://www.whitebream.com/p801.shtml
        So theres possible development but no product



        I was just driving around SF last week and I kept loosing signal in certain spots because of the buildings. So I as well would like a dead reckoning USB/RS232 reciever


        I currently use a Garmin OEM 15L
        Its quite a good little reciever and can be even better depending on what antenna you buy. Requires a little wire splicing but its easy if youre familiar with just basic electronics
        2004 G35 Coupe project

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        • #5
          As, aoLhaTer stated its called Dead-Reckoning. I believe jcdillin and Scouce are working on something like it for there cars. Here's a link that might help.

          http://www.u-blox.com/products/Produ...3-X-04001).pdf
          Installed
          Asus A7N8X-VM - AMD Mobile Athlon 2400
          512 Ram - 60GB HD - Opus 150w
          Lilliput 7" - Rikaline 6010
          [00000000000001100010-] 98% Completed

          Check Out My Install!!!

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          • #6
            Interesting link.

            That's pretty much the problem I was considering. I'm not so much worried about losing signal in SF's downtown (as I know it like the back of my hand), but more about being in a similar location that I don't know.

            Hmm, so you can add a seperate antenna to the GPS receiver? I am considering using a BMW, Audi or HOnda/Acura type little antenna that goes on the roof of the car instead of just putting the receiver on the rear deck.

            Any antennas you can recommend?

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            • #7
              arg.... stupid pdf load times...
              2008 Civic... Sound system... then carputer install...
              WORK IN PROGRESS

              If you look at my avatar closely, you can see a chick with two big knockers....

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              • #8
                I guess you've missed this thread:
                http://www.mp3car.com/vbulletin/showthread.php?t=49405

                Laidback already has it working and jsdillin is working on the design for a daughterboard to the gyro and interfacing the ublox module.

                /M

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