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[aprssig] Vehicle Signatures

Steve Noskowicz noskosteve at yahoo.com
Wed Dec 5 21:58:53 UTC 2012



Well,

I know someone with a Volt and someone with a Prius and I have a Spectrum analyzer and 100 MHz. scope...

 Since I have designed PWM motor drives...

  I'd also look for the PWM frequency and other characteristics of the  electirc drive's 'signiture'.  Things like orientation of the pickup coil for max PWM response, how things change with acceleration, breaking.  Things like that.


73, Steve, K9DCI  USN (Vet)  MOT (Ret)  Ham (Yet)

--- On Wed, 12/5/12, Robert Bruninga <bruninga at usna.edu> wrote:
> Crazy idea for vehicle signatures.
> 
> Knowing how electronic car control systems are becoming, I
> wonder how much
> of a "signature" I s emitted by various makes and
> models.  Particularly, I
> was wanting to detect the presence of Electric Cars.
> 
> A coil in the road, and look for some signature freqs. 
> Most of the RFI
> emissions woiuld be speed related, but I wonder if there are
> some unique
> single freqs emitted by some cars.  Maybe Ill go string
> a coil around mine
> and hook to a spectrum analyzer and see if anything pops
> up.
> 
> Detecting hams blabbering on their radios would be
> easy.  But Im looking
> for model...
> 
> Bob, WB4APR
> 
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