Accelerometer and latch

Discussion in 'The Projects Forum' started by inwo, Dec 22, 2013.

  1. inwo

    Thread Starter Well-Known Member

    Nov 7, 2013
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    Looking for a simple accelerometer and latch circuit for a project.

    Single axis.

    Detects kick back from large hand held tool. (drill)

    I'm guessing 10cm to 100cm/sec/sec, but that's a guess pulled out of my hat.


    Latch would open circuit to clutch. 200ma @ 60vdc.

    More details if interest.
     
    Last edited: Dec 22, 2013
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    If I read the intention right, could the initial current be sensed until a certain off load level, then sensor ignored after the initial sense time?
    Using a typical current transformer relay.
    An alternative, a soft start circuit?
    Max.
     
    inwo likes this.
  3. inwo

    Thread Starter Well-Known Member

    Nov 7, 2013
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    Possibly, yes.

    For this to fly it has to be simple.

    Like a tilt switch but inertia rather than gravity activating.
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Depends if you want to go the mechanical/electric route rather than primarily electronic.
    Max.
     
  5. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    I would use a two-axis or three axis accelerometer to measure the sudden torque along the rotational axis of the drill.
     
  6. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    I'd go with Max's approach. Other things (friction etc) being equal, instantaneous current should be proportional to kick-back torque.
     
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