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detecting tire pressure

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  • detecting tire pressure

    Hi,

    I rented a car last weekend, and it's onboard computer knew the pressure of each tire. I want to put that into my car. Has anyone done this? I figure all you would need is a pressure sensor for each tire, but not sure how you would go about connecting it, i.e. wireless or wired, and power becomes an issue if wireless. Anyway, if anyone has done this, I would love to hear about how you went about it.


    Thanks!

  • #2
    A buddy of mine put tire pressure sensors in his Saab. They make kits for it. Pretty slick looking too.
    Failure is not an option....



    It's installed by default on every version of Windows.

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    • #3
      The easiest way to do it is the first way it was done by Porsche. Monitoring individual tire speeds as they rotate.

      An underinflated tire will have a smaller diameter. Smaller diameter covering the same distance, means it rotates faster. Now "faster" is compared to the other tires. You can have up to 3 rotating faster because if all 4 were faster, then they would be the same if that makes sense. So by monitoring each wheel's independant speed, you can detect up to 3 simultaneous low pressure. And since all ABS enabled cars have individual speed sensors already all you have to do tap into all 4 and monitor them.
      Fusion Brain Version 6 Released!
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      • #4
        Do you have a link to the kit your friend used?


        The speed monitoring idea is good, but I would like to be able to tell the exact pressure of each tire, not just if they differ from one another.

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        • #5
          Tyre pressure sensors in Saab

          A buddy of mine put tire pressure sensors in his Saab. They make kits for it. Pretty slick looking too.
          Barry I'd be interested in any info you have on this product!

          Regards
          Colin

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          • #6
            http://cgi.ebay.com/ebaymotors/WIREL...spagenameZWDVW
            The Car 2005 Scion xB

            The Truck 2004 GMC Canyon

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            • #8
              I wonder how hard it would be to hack that and send the information over serial or the like?
              Jan Bennett
              FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

              Please post on the forums! Chances are, someone else has or will have the same questions as you!

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              • #9
                Originally posted by RedGTiVR6 View Post
                I wonder how hard it would be to hack that and send the information over serial or the like?
                That is what I was thinking, or even via the wireless signals, if you could receive them on the correct freq.
                The Car 2005 Scion xB

                The Truck 2004 GMC Canyon

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                • #10
                  that is interesting

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                  • #11
                    I've made my own TPMS by hacking an aftermarket kit bought on eBay and writing a RoadRunner plugin, in order to obtain the tyres informations directly in the front end, by an USB connection to the receiver.
                    _______________________________________
                    Car installation 95% [■■■■■■■■■■■■■■■■■■■]
                    Current project: Parking sensor USB interface

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                    • #12
                      robby...share share share

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                      • #13
                        http://www.tire-pressure-monitors.com/#displays

                        "For the racing specialist, RS232 links are available to enable conditions to be sent via computer telemetry to the pit."

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                        • #14
                          Give me the time to organize a bit of documentation, and I'll publish all in the forum.

                          By the moment, this is a photo of the custom device I've made:
                          Click image for larger version

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                          and this is a screenshot of the software in action:
                          Click image for larger version

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Views:	1
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ID:	2267429
                          _______________________________________
                          Car installation 95% [■■■■■■■■■■■■■■■■■■■]
                          Current project: Parking sensor USB interface

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                          • #15
                            robby.. i beg you..make it and sell it. this is fantastic

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