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

  1. #1
    Maximum Bitrate LiquidKernel's Avatar
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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. #2
    FLAC aoLhaTer's Avatar
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    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

  3. #3
    Maximum Bitrate LiquidKernel's Avatar
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    Quote 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?

  4. #4
    FLAC aoLhaTer's Avatar
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    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

  5. #5
    I see dead kittens Quattro's Avatar
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    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
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  6. #6
    Maximum Bitrate LiquidKernel's Avatar
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    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?

  7. #7
    Constant Bitrate CornToeGoblin's Avatar
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    arg.... stupid pdf load times...
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  8. #8
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    I guess you've missed this thread:
    Ublox module , help needed!

    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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