Results 1 to 10 of 10

Thread: Tire pressure monitor??

  1. #1
    Variable Bitrate
    Join Date
    Jan 2002
    Location
    Florida
    Posts
    236

    Tire pressure monitor??

    What about some simple tire pressure monitors? Maybe little devices that attach to the valve stem and send radio pulses to a central controller, that maybe hooks up to a computer... per say, serial link?

    How difficult would this be? What about power? Could there be a small rotating hammer (like in the selfpowering wrist watches), that generates power from the rotating tire?

    And ideas or throughts, throw them this way.
    System in the works:
    Celeron 850 or PIII 933, SB Live! Value into a stock 4 channel amp, ATI vid, 10.4" sharp LCD w/ allen's controller, Elo SW touchscreen overlay and controller, GPS, TV tuner, FW DVD drive, 4 port serial card, and some other stuff....

    Loads of ideas.

  2. #2
    Variable Bitrate
    Join Date
    Aug 2002
    Location
    longview washington
    Posts
    425
    i remember reading in one of my many hotrod magazines and engine book that a company had a stand alone device that did that same thing with a small lcd display that showed psi on each tire i want to say it was made by a company called eagle something but don' quote me on it
    WINNER!!!!
    run-on sentance comp 2002!!
    :)

  3. #3
    Variable Bitrate
    Join Date
    Sep 2002
    Location
    Just North of Toronto, Ontario, Canada
    Posts
    384
    Its possible somehow, ive seen it listed as features on some cars (i dont remember what cars, but they were very high end i think, euopean maybe).
    Project AutoBoxen: Coming along, almost ready to hook up in the car.
    Celeron 500, 192mb ram, 8gb hdd, other stuff.
    '91 Mazda 626: Its free, so ill use it.

  4. #4
    Newbie
    Join Date
    Nov 2001
    Posts
    44
    www.smartire.com

    BMW cars have them

  5. #5
    Constant Bitrate
    Join Date
    Feb 2001
    Location
    Somerville, MA
    Posts
    149
    My new MINI Cooper S has this. I guess it is nice, though it really is sueful when you get the runflat tires, as you might not know that the tire is flat without it.

    I'm pretty sure it is illegal to have ht runflats without the monitoring system.

    Twostep

  6. #6
    Variable Bitrate
    Join Date
    Jan 2002
    Location
    Florida
    Posts
    236
    I knew about the expensive systems, and the OEM sytems, but what about building a similar system that interfaces with a PC?

    Aside from the bulding of the small units to attach to the tire, it should be simple, right??
    System in the works:
    Celeron 850 or PIII 933, SB Live! Value into a stock 4 channel amp, ATI vid, 10.4" sharp LCD w/ allen's controller, Elo SW touchscreen overlay and controller, GPS, TV tuner, FW DVD drive, 4 port serial card, and some other stuff....

    Loads of ideas.

  7. #7
    Constant Bitrate
    Join Date
    Feb 2001
    Location
    Somerville, MA
    Posts
    149
    I guess so. I believe that the OEM systems don't actually have a sensor inside the tire. I think they measure how much force it takes to turn the tire or something, because my sensor gave me a false flat when I drove through some mud. The manual for the car claims that ice or mud can cause false flats.

    Putting something on the valve stem would be somewhat difficult, as you would need to get power and signal wires out to the tire. I know you can use those swivel things, but I think you would need to drill into the axle or something.

    Twostep

  8. #8
    Low Bitrate
    Join Date
    Dec 2002
    Location
    East Tennessee
    Posts
    72
    I just had an Idea about this. To power it you could put a magnet(s) on your break pad and a coil on the wheel to generate electricity to power it. You need some large capacitors to keep the power to the IC flowing and it might not work very well at slow speeds but batteries should do the trick. Using RF would probably be your best bet on getting the signal to the computer. Maybe these Ideas can help you if you try building any thing. I would also think you would need some sort of microprocessor to interface between your computer and the sensor signals.
    Comp. Specs:Shuttle SS40G, Athlon XP 1700+, 256MB DDR, 40GB HD, Belkin Desktop 802.11b card (good range), SB 128 sound (onboard is a bit noisy), DVD ROM
    Toshiba 100CS laptop, P75 40mb ram, 550MB HD, Megahertz LAN/modem PC card, modified to run off 12VDC

    Other stuff:Generic USB hub & USB to serial adapters, BS2SX power control system w/battery buffer, Jazz 300W Inverter, FM Modulator, Palm Vx, & GPS

    Status: 80% complete (Almost done with the controle boxes)

  9. #9
    Newbie
    Join Date
    Dec 2002
    Posts
    13
    If you REALLY want to build it instead of buy a full system from www.tirerack.com, take a look at this application note http://www.microchip.com/download/ap...pic/00238a.pdf

    Good luck
    Alex Lear

  10. #10
    Low Bitrate
    Join Date
    Dec 2002
    Location
    East Tennessee
    Posts
    72
    You can also get all the chips you need for free from them...
    Comp. Specs:Shuttle SS40G, Athlon XP 1700+, 256MB DDR, 40GB HD, Belkin Desktop 802.11b card (good range), SB 128 sound (onboard is a bit noisy), DVD ROM
    Toshiba 100CS laptop, P75 40mb ram, 550MB HD, Megahertz LAN/modem PC card, modified to run off 12VDC

    Other stuff:Generic USB hub & USB to serial adapters, BS2SX power control system w/battery buffer, Jazz 300W Inverter, FM Modulator, Palm Vx, & GPS

    Status: 80% complete (Almost done with the controle boxes)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •