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Re: gEDA-user: OT: Bike Alarms
Hi,
> -----Original Message-----
> From: geda-user-bounces@xxxxxxxxxxxxxx
> [mailto:geda-user-bounces@xxxxxxxxxxxxxx] On Behalf Of John Griessen
> Sent: Thursday, May 13, 2010 5:41 PM
> To: gEDA user mailing list
> Subject: Re: gEDA-user: OT: Bike Alarms
>
> David SMITH wrote:
> > John Griessen wrote:
> >> David C. Kerber wrote:
> >>> If you've got a carbon frame, you could drop it into the
> seat tube,
> >>> where it would never be seen, and therefore never removed by a
> >>> thief...
> >> This really does sound like a product since bikes can cost
> these days.
> >
> > Not to put too much of a spanner in the works, but...
> >
> > Where does the power come from?
>
> a 1 inch square solar panel. Solar panels made of flexible
> film exist, but are not robust. They'll get better.
>
> David SMITH wrote:
> > Of course, we also have the problem of getting a decent
> GPS fix, since > if it's stolen, it will need to get enough
> signal to report its > position, and if it's being stored
> inside a building, that's going to be > very difficult,
>
> Instead of relying on GPS, another tactic discussed so far
> was to monitor closeness to various safe zones, where it can
> communicate with a base station. Then the task becomes
> decide when to alarm and contact the cell phone towers.
> Trying to contact and getting no signal could be quick and a
> low power drain. Without communication there would be no
> need to go into mode 3. get a GPS fix, (or not), and send
> status to a phone number. If GPS was unavailable, it might
> be possible to track by phone calls to the bike, if the cell
> phone company cooperated, i.e. after police were involved.
>
> JG
> --
> Ecosensory Austin TX
> tinyOS devel on: ubuntu Linux; tinyOS v2.0.2; telosb ecosens1
>
>
I like the "toothbrush power supply" idea of Gene.
Another tactic may be to elongate the reporting interval when the "bike
under thread" remains in a assigned "safe zone" (for bike theft there are no
safe zones in the Netherlands).
It could work with timing intervals of 15 minutes, 30 minutes, 1 hour, 2
hours etc.
When a bike is in the "safe zone" for 15 minutes for two adjacent periods of
time, switch to 30 minutes intervals etc.
Just my EUR 0.02 on the subject.
Kind regards,
Bert Timmerman.
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