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Counting currency notes in a stack using optical technology

Discussion in 'Electronic Repair' started by Aks, Mar 31, 2007.

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  1. Aks

    Aks Guest

    Hi People.

    I am looking at a particular application. I want to build a currency
    counter. The device will be based on optical technology. What I want
    to do is, "look" at the side of the stack of banknotes and from there,
    read the number of notes present in the stack.

    There are two possible approached that come to my mind :

    1.) The CD-ROM Approach

    Here, the light is made to incident on the "side" of the stack and
    whatever light is reflected back, is read by a device. Now, the number
    of "gaps" in the light gives us the number of notes.
    The upside of using this approach will be less complexity in the
    The downside will be , this approach will involve moving mechanical
    parts. (In the form of a light source that 'scans' the entire width of
    the 'side' of the stack)
    I've found a patent for this approach. Here's the link.

    Here is a list of patents related to this one^20 OR 4694474

    And here is the US patent Number 4694474,4694474&stemming=on

    To read the full texts of these patents, u need to make and account on Its free.

    2.) The image-processing approach
    An image of the 'side' of the stack is taken by a CCD or a CMOS
    camera. The image is then passed on to an image processing unit which
    then processes the image. There can be seen visible distinct 'lines',
    horizontal lines in the image. Each line representing one note. If we
    can read the number of such lines, we can build such a device.
    Now, I've got a patent for this as well. And en extremely detailed
    one, describing, in detail, the complete hardware, software and the
    diagrams of the project. Here it is.

    US Patent Number 5534690,5534690&stemming=on

    But being from computer science background, I am unable to understand
    this completely. Can someone help me ?
    I am ready to pay, if someone can make that thing for me. I am based
    in India.

  2. Aks

    Aks Guest

    Man...thats for serious business.
    Bennett, the link that you gave me is of a usual currency counter.
    These machines are heavy, and inaccurate and they do NOT use optical
    I don't want counterfeit detection capabilities in the system. All I
    want is, the ability of quickly 'count' the number of notes in a
    stack. The stack size will be of the order of 100 notes.
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