Ideas for a moving sensor?

Discussion in 'The Projects Forum' started by ssolitare, Jan 4, 2011.

  1. ssolitare

    Thread Starter Member

    Nov 29, 2010
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    So I want this proximity sensor that I am making to move up and down vertically.

    My initial idea would be to attach the sensor to a belt that rolls.

    What are some other methods?
     
  2. edgetrigger

    Member

    Dec 19, 2010
    133
    19
    you could use an array of them spaced evenly and read through a multiplexer to have a quicker response.
     
  3. ssolitare

    Thread Starter Member

    Nov 29, 2010
    34
    0
    Yessir that's the way that I will actually do it, but i'm curious about a moving one as well.
     
  4. edgetrigger

    Member

    Dec 19, 2010
    133
    19
    Then Simple belt and pulley can be used with a dc motor. Here you could connect two sensors diagonally opposite to each other, so that you could coverage is more. use limit switch to switch the direction from home to mid point positions.
     
  5. Adjuster

    Well-Known Member

    Dec 26, 2010
    2,147
    300
    Adding this kind of mechanical gadget can introduce a bunch of problems, notably poor reliability. Remember that you would need to get power to / signal from the detector, and also track its position.

    What benefit would you expect to get over a set of fixed detectors - cost?
     
  6. CDRIVE

    Senior Member

    Jul 1, 2008
    2,223
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    I assume you mean that the 'detected object' is moving up and down vertically, not the Sensor?
     
  7. ssolitare

    Thread Starter Member

    Nov 29, 2010
    34
    0
    Nada, but I was curious about an alternative method for the sake of it.

    And CD, the sensor would be.
     
  8. #12

    Expert

    Nov 30, 2010
    16,247
    6,744
    You could make a bigger sensor...loop type, and move nothing and multiplex nothing. Depends on what you are detecting. Marbles or people?
     
  9. ssolitare

    Thread Starter Member

    Nov 29, 2010
    34
    0
    Egh lets say a random object like a cup. I never read anything about loop sensors though.
     
  10. #12

    Expert

    Nov 30, 2010
    16,247
    6,744
    You aren't telling much, so I'll just start copying out of the book:

    Capacitance relays, Doppler effect proximity detector, loaded oscillator proximity detector, field excited proximity detector, light beam detectors (visible or not), magnetic detectors (if the cup is metal)...
     
  11. ssolitare

    Thread Starter Member

    Nov 29, 2010
    34
    0
    Oh okay, I am familiar with those types of sensors.

    The loop sensor interested me because you said that I didn't need multiple sensors or moving parts, so I was just wondering what it was about.
     
  12. edgetrigger

    Member

    Dec 19, 2010
    133
    19
    Hey, do you have any interest in having a CCD camera and then working on object detection logic.
     
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