Suggest me an idea

Discussion in 'The Projects Forum' started by ecjohnny, May 30, 2008.

  1. ecjohnny

    Thread Starter Senior Member

    Jul 16, 2005
    142
    0
    please can anyone suggest me some solutions or ways i can solve this preferably cheap and efficient.

    i need a device/something that will detect a person GOING OUT ONLY(door).
    i mean i want a device/something that will sense or ... a person going out and the person is restricted to only the house owner.

    An example would explain better:
    1st: House owner is in the house. His friend pay him a visit then left.
    * i dont want to detect his friend leaving.
    2nd: House owner is in the house. His friend pay him a visit. Both of them left together.
    * Here i want to detect the owner going out.
    3rd: house owner leaves house.
    *Here i want to detect the owner going out.

    The device will send a signal to my computer via ???
    i am doing a home monitoring project. Any help or feedback would be appreciated.
     
  2. Caveman

    Active Member

    Apr 15, 2008
    471
    0
    The owner carries a device on his person that is detected as going out.
     
  3. silvrstring

    Active Member

    Mar 27, 2008
    159
    0
    Did you kidnapp someone?
     
  4. Michel_e_r

    Member

    May 30, 2008
    10
    0
    How about RFID?
     
  5. ecjohnny

    Thread Starter Senior Member

    Jul 16, 2005
    142
    0
    No... i am not desperate for $. :D

    Hopefully not carry anything. If elderly carry something, it must be small and light.
     
  6. loosewire

    AAC Fanatic!

    Apr 25, 2008
    1,584
    435
    You say computer system at office,I think there are system's that you can
    watch who is coming and going.You are at the office,but you go home the
    computer system will save the information.You play back the system and you can
    who is coming and going,if you are not monitoring the alarm will page you.You say
    money no problem. Check out computer system's I'm sure you will find some thing.
    I watched my car being stolen by computer after I could not find my car in parking
    space. reply LOOSEWIRE
     
  7. loosewire

    AAC Fanatic!

    Apr 25, 2008
    1,584
    435
    I can tell you a web site that show's where your computer is. This site
    give's you the number's.
     
  8. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    RFID tags are small and light. They could be worn around the neck or on the wrist along with Medic Alert tags. They would require a reader at each exit.

    The challenge would be to position the reader so it detects an actual exit, and not merely proximity to the door.
     
  9. A.T.T.R

    New Member

    Jun 2, 2008
    4
    0
    Rfid to determin who is near the door
    then two light sensors with a trip lighton other side to determin direction of travel
    or possiably two or three motion detectors to determin direction
     
  10. ecjohnny

    Thread Starter Senior Member

    Jul 16, 2005
    142
    0
    can you explained further? can i buy this thing? or will i have to make/program it myself?
     
  11. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    You can buy them. They come as badges, keyring fobs, paper-thin stickers, or wallet-compatible cards. The readers are boxes hanging on the wall or supported by a post, or hand-held scanners. Interfacing depends on manufacturer and intended use, but much literature is available.

    "RFID" = "radio frequency identification."

    Here's one website devoted to RFID: http://www.rfidjournal.com/?gclid=CIih2P3x3pMCFR4vagod2yfIVQ
     
  12. Externet

    AAC Fanatic!

    Nov 29, 2005
    761
    57
    Cheap.... efficient... simple...?

    A magnet in all his shoes heel. Two simple wide coils sewn under carpets by the exits.

    The inner coil disturbance sensor will arm and the outer will trigger. Won't do anything in reverse.

    Similar to the traffic light vehicle coils sensors embedded in the pavement.
    Of course won't work if the elderly sneaks out barefoot or knows magnets are concealed in the shoes.:rolleyes:

    I will leave the computer part to experts...

    Miguel
     
    Last edited: Jun 6, 2008
  13. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    I like Externet's idea. Not sure how to keep from tracking one resident leaving another resident's house, though. Is there any way to distinguish between different magnets with such a system?
     
  14. ecjohnny

    Thread Starter Senior Member

    Jul 16, 2005
    142
    0

    thanks.. i think this will work but is the RFID reader just a receiver? can i connect a RF transmitter to it to send the trigger to another RF receiver ? or my computer.(VB program)
    sorry about any noob question but i am new to this thing.
     
    Last edited: Jun 6, 2008
  15. ftcnet

    New Member

    Jun 7, 2008
    4
    0
Loading...