need a hall effect sensor circuit to detect the speed of the gear

Discussion in 'The Projects Forum' started by janilkumar9, Dec 28, 2015.

hall effect sensor circuit require...

  1. electronic circuit design

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  2. hall effect sensor

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  3. speed sensing transduce

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  1. janilkumar9

    Thread Starter New Member

    Dec 17, 2015
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    i need a hall effect sensor for gear tooth speed sensing in clock wise and anti clock wise directions
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    I have never come across a quadrature differential Hall sensor, if bi direction sense is needed.
    You could set up two in quadrature, there are the miniature Honeywell SS400 series, there is also the gear sensor ATS617L from Allegro.
    Max.
     
  3. janilkumar9

    Thread Starter New Member

    Dec 17, 2015
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    we appreciate for your reply.
    present i am using melexis ( MLX-90217) Hall effect gear tooth sensor.. this is working fine with 1.5 mm gap but requires 2.5 to 3.0 mm gap.

    Honey well ss400 series would be a better option. Still am suspecting my magnet, i need a help to choose a type of magnet and how to choose for this particular application.

    If you have anymore documents to understand the concept of reluctance and gauss of magnet, please share data.
     
  4. Picbuster

    Member

    Dec 2, 2013
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  5. MaxHeadRoom

    Expert

    Jul 18, 2013
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    The ATS617L from Allegro requires no magnet and is a precise gear sensor.
    Max.
     
  6. janilkumar9

    Thread Starter New Member

    Dec 17, 2015
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    But ATS617L works for 2.5 mm max as per datasheet.

    Refer good magnets to provide better magnetic field. I had a circuit what i have been using with a magnet, problem with distance to be operate.

    I could not change my entire design with new technology but some.
     
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
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    You mean you are sensing gear teeth using magnets?
    Max.
     
  8. janilkumar9

    Thread Starter New Member

    Dec 17, 2015
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    yes.. I mean hall sensors in quadrature are in between gear tooth and magnet.
    Attached magnet and hall ic arrangements photographs.
    this will insert in a stainless steel housing to sense the gear tooth of motor. it sense the speed of the rotor.
    Now suggest me any changes require in selecting magnet or hall IC.

    thanks
     
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