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Vibration sensor

Discussion in 'Sensors and Actuators' started by alaswad, Apr 21, 2011.

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  1. alaswad

    alaswad

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    Apr 21, 2011
    Hi everyone

    As part of a sensors project, I'm thinking of designing a bed bug detector. There is already one commercially available which detects the CO2 emitted by the bugs.

    I'm thinking of taking a different approach which I don't think exists and should be fairly easy to implement.

    I want to design a mattress with sensors spread out all over it that can detect the vibrations caused by their legs as they walk on the bed. I figured that it would be simple to separate those vibrations from the ones caused by the sleeper as they are much smaller and have a higher frequency.

    Can anyone suggest what kind of sensor could do such thing? I am not interested in the interface with a measurement system, just the sensors.

    Many thanks :)
     
  2. poor mystic

    poor mystic

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    31
    Apr 8, 2011
    maybe a microphone?
     
  3. alaswad

    alaswad

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    0
    Apr 21, 2011
    what do you mean? use a system that has the same idea of a diaphragm in the microphone?
     
  4. poor mystic

    poor mystic

    1,067
    31
    Apr 8, 2011
    I was thinking of very cheap electret microphones which could be sewn into the ticking.
     
  5. alaswad

    alaswad

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    0
    Apr 21, 2011
    i've thought of that
    but another aspect I can't forget about is the actual comfort of the mattress (if this sensor idea works it could be commercialised), and if I just put the microphones or any other hardware at the surface it would affect the comfort aspect of it

    this means that the system has to be at a certain depth within the mattress, and since the bedbug legs will have a tiny force on the mattress, and these will be further toned down by the mattress, i need a pretty sensitive sensor
     
  6. poor mystic

    poor mystic

    1,067
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    Apr 8, 2011
    I'd say give it a go - you might be surprised!
     
  7. alaswad

    alaswad

    6
    0
    Apr 21, 2011
    alright i'm taking a look at it now, thanks for the help :)
     
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