Idea for new type of detector...

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I'm reading an article at the NBC News website in another tab right now tha
t talks about how companies are increasingly and passively monitoring cell  
phone signals emitted as people walk about ( http://www.nbcnews.com/technol
ogy/your-phone-blabbing-your-location-anyone-who-will-listen-8C10989061 if  
anyone is interested ).

It got me thinking that it might be neat to construct a new type of alarm s
ystem detector that triggered whenever a cell phone signal of certain ampli
tude was picked up in a designated quiet zone.  So for example, such a dete
ctor would arm along with the rest of the system and if someone with an act
ive -- basically meaning "turned on" -- cell phone walked into a room, the  
alarm would go off or add to its actual intrusion verification sequence.

Has anyone heard of something like this or have any thoughts on how it migh
t work?

- Dave

david@davethewebguy.com
http://www.davethewebguy.com

Re: Idea for new type of detector...
On Saturday, August 31, 2013 8:02:28 PM UTC-4, da...@davethewebguy.com wrot
e:
Quoted text here. Click to load it
hat talks about how companies are increasingly and passively monitoring cel
l phone signals emitted as people walk about ( http://www.nbcnews.com/techn
ology/your-phone-blabbing-your-location-anyone-who-will-listen-8C10989061 i
f anyone is interested ).
Quoted text here. Click to load it
 system detector that triggered whenever a cell phone signal of certain amp
litude was picked up in a designated quiet zone.  So for example, such a de
tector would arm along with the rest of the system and if someone with an a
ctive -- basically meaning "turned on" -- cell phone walked into a room, th
e alarm would go off or add to its actual intrusion verification sequence.
Quoted text here. Click to load it
ght work?
Quoted text here. Click to load it

They have  RF anti jam signals on alarms now  

Re: Idea for new type of detector...
On Saturday, August 31, 2013 8:02:28 PM UTC-4, da...@davethewebguy.com wrot
e:
Quoted text here. Click to load it
hat talks about how companies are increasingly and passively monitoring cel
l phone signals emitted as people walk about ( http://www.nbcnews.com/techn
ology/your-phone-blabbing-your-location-anyone-who-will-listen-8C10989061 i
f anyone is interested ).
Quoted text here. Click to load it
 system detector that triggered whenever a cell phone signal of certain amp
litude was picked up in a designated quiet zone.  So for example, such a de
tector would arm along with the rest of the system and if someone with an a
ctive -- basically meaning "turned on" -- cell phone walked into a room, th
e alarm would go off or add to its actual intrusion verification sequence.
Quoted text here. Click to load it
ght work?
Quoted text here. Click to load it

They already have jam detection built into some systems for that purpose

Re: Idea for new type of detector...
On Saturday, August 31, 2013 8:02:28 PM UTC-4, da...@davethewebguy.com wrot
e:
Quoted text here. Click to load it
hat talks about how companies are increasingly and passively monitoring cel
l phone signals emitted as people walk about ( http://www.nbcnews.com/techn
ology/your-phone-blabbing-your-location-anyone-who-will-listen-8C10989061 i
f anyone is interested ). It got me thinking that it might be neat to const
ruct a new type of alarm system detector that triggered whenever a cell pho
ne signal of certain amplitude was picked up in a designated quiet zone. So
 for example, such a detector would arm along with the rest of the system a
nd if someone with an active -- basically meaning "turned on" -- cell phone
 walked into a room, the alarm would go off or add to its actual intrusion  
verification sequence. Has anyone heard of something like this or have any  
thoughts on how it might work? - Dave david@davethewebguy.com http://www.da
vethewebguy.com

There would be no way to contain it within a given area,  long narrow room.
... a group of rooms that did not conform to a standard geometrical shape.  
would more than one cellphone creater a stronger signal? how could you alwa
ys get to mount it in the center of an area? And , of course , what if the  
cell phone wasn't turned on? I don't see much of a practical use for it con
sidering the likely cost of such a product.  

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