[LINK] Hidden device in parking bays

Geoffrey Ramadan gramadan at umd.com.au
Tue Dec 5 22:32:23 AEDT 2006

Steve Jenkin wrote:
> On Mon, Nov 27, 2006 at 11:13:13PM +1000, Andy Farkas wrote:
> For those interested, company website "how does it work" page:
> <http://vm-sys.com/how.html>
> Front page has a nice shot of one of the hand-helds.
> Offices in Sydney & Melbourne.
> Brochure (PDF) is same text and photos as web-site.
> [Which came first, the Brochure of the Webpage?]
> They come up on IP Australia as well - but IPA is down for maint. this
> arvo. Maybe Patent "2005243161" - granted in 2005.
> Few details on the device - "10 year battery life", 
> "secure radio communication with a handheld unit", (read) "up to a distance of
> approximately 50 metre",
> "... can be easily and securely reprogrammed."
> An ambiguous reference is made:
> "All data retrieved from (In Ground Unit) IGUs are encrypted, digitally signed and sent 
> to a back office server."
> -> are the radio-comms encrypted & signed, or the contents of the
>    hand-held?
I read this as being encrypted while being sent by the hand held GPRS 

> So we know it's *not* bluetooth - too much range.
> Wonder what the RF side could be to go 50M *and* last 10 years...
Probably IEEE 802.15.4

Low power, long battery life. Used for the basis of  telemetry, Zigbee 
and other wireless mesh networking devices.

802.15.4 radio devices can have a standby current of only 5uA (mico-Amps)

The PODS probably use low power magnetometer

> Couldn't quickly work out the power budget - say 2000mAH for Lithium or
> Silver-oxide? But that'd be 70 micro-watts (continuous).
> So it'd be like a car electronic tag - read-out on demand.
> Anyone work with RF stuff like this??
> A question for the LINK list:
>  - why haven't cars gone to permanent electronic tags?
Apart from the privacy issues, what would be its purpose?


Geoffrey Ramadan B.E.(Elec)
Chairman, Automatic Data Capture Association (www.adca.com.au)
Managing Director, Unique Micro Design (www.umd.com.au)

>  cheers
>  sj
>> I'm guessing the revenue from fines will offset the expense of digging up
>> the asphalt in areas where they want to use these devices, and councils
>> will post "sorry for the inconvenience" type signs whilst the work happens:
>> <http://www.news.com.au/heraldsun/story/0,21985,20816995-661,00.html>
>> "MOTORISTS will be sitting ducks as councils launch a hi-tech parking
>> blitz that
>> will rip hundreds of millions of dollars in fines from Victorians.
>> New technology will enable councils and parking officers to fine
>> drivers the second
>> a car overstays its time limit."
>> -andyf
>> _______________________________________________
>> Link mailing list
>> Link at mailman.anu.edu.au
>> http://mailman.anu.edu.au/mailman/listinfo/link

More information about the Link mailing list