What is car's undercarriage made of?

Discussion in 'The Projects Forum' started by Neyolight, Feb 6, 2012.

  1. Neyolight

    Thread Starter Member

    Dec 13, 2011
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    Hi all

    I want to know what is a car's undercarriage made of ? What metal ( or even specific what alloy ) ?

    I know its something close to aluminium but not quite sure. It looks aluminium!

    Also does different car manufacturers ( e.g toyota, honda, hyundai etc) use a different metal for their car's undercarriage?

    Thanks
     
  2. DerStrom8

    Well-Known Member

    Feb 20, 2011
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    In order to answer this we'd need to know why you ask.
     
  3. Neyolight

    Thread Starter Member

    Dec 13, 2011
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    3
    Well Im designing an inductive loop sensor.

    I know the mass of the metal doesn't affect the result of a loop, but the metal type and surface area does.
     
  4. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    It varies from manufacturer to manufacturer but...
    general purpose low carbon steel or aluminum (5182/5575/6061/6063 alloys).

    Could even be magnesium/carbon fiber/titanium on exotics.
     
    Neyolight likes this.
  5. Experimentonomen

    Member

    Feb 16, 2011
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    If your looking to detect a car passing over a sensor, check how the traffic control lights work and how their sensors are setup.

    I would however think a load cell would be the easiest way to detect a car, rather than using magnetism based sensors.
     
  6. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    Many use an inductive loop sensor :)
     
  7. BSomer

    Member

    Dec 28, 2011
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    Traffic light controls vary. They do use an inductive loop to detect a vehicle. However, due to cars using less and less metal they have gone to a method that use cameras or motion detectors of some sort. I haven't had much interaction with the camera type so can't say much about those. The loop type I have installled for traffic lights and even automatic gates for access control. They generally have a wire that creates a loop in the pavement and, as I understand it, when a large enough metal object passes over the loop it will change the frequency response in the loop. That triggers some circuit to do something.
     
  8. wayneh

    Expert

    Sep 9, 2010
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    The "no moving parts" solution - the inductive loop - wins. I thought for the longest time that there were load cells or switches involved, but the traffic lights around here at least are all inductive loop metal detectors.
     
  9. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    Load sensors have been phased out for traffic because they won't pick up a motorcycle. The new ones are all magnetic loops.
     
  10. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    They are also being phased out due to the cost of maintenance and installation. They have to dig up roads if there is a fault, which is much worse than just replacing a mast-mounted camera module.

    With the powerful microprocessors available now for a couple of bucks per IC a camera based solution is definitely better.
     
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