[LINK] RFID in Govt, and in People

Geoff Ramadan gramadan at umd.com.au
Tue Oct 3 15:12:11 AEST 2006

Howard Lowndes wrote:
> Geoff Ramadan wrote:
>> The majority of real time "location based" system are based on ACTIVE 
>> tags. Not passive tags which have limited range.
>> Also many systems use the WiFi/IEEE802.11 wireless infrastructure (via 
>> special access points) to triangulate the location of the active tag. 
>> Therefore, you can track any tag provided it is with in the WiFi 
>> coverage.
>> The only downside is that the TAG needs a battery and is more 
>> expensive than a passive tag ($40 to $80)
> and we all know that batteries go flat and that ppl forget to replace 
> them (think smoke detectors), and the only time you will know that the 
> batteries are flat is when you cannot find the asset because the 
> batteries are flat.  It's a bit Catch 22.

Its not that bad, batteries last between 3 to 5 years.

Some have inbuilt battery monitors.

Also, nearly all devices would have to go through some regular calibration or 
testing regime so battery maintenance should simply become part of the 
procedure, just like any other asset.

Geoffrey Ramadan

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