dsp based project

Discussion in 'The Projects Forum' started by Varsha, Dec 12, 2008.

  1. Varsha

    Thread Starter Member

    Nov 17, 2008
    14
    0
    can someone suggest a dsp based project that can be done in the undergraduate level...how do u implement audio spectrum analyser.
    Thank you
    Varsha
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,135
    1,786
    How about a precision measuring device using LVDTs
     
  3. Varsha

    Thread Starter Member

    Nov 17, 2008
    14
    0
    could you give me more insight into it's implementation and areas of application
    thank you
    Varsha
     
  4. Papabravo

    Expert

    Feb 24, 2006
    10,135
    1,786
    An LVDT is a transformer that is excited with a sinewave. Mechanical motion affects the coupling of the signal on the primary onto the secondary. It can be used to measure distances on the order of nanometers. This precision is commonly required on grinding machines.
     
  5. leftyretro

    Active Member

    Nov 25, 2008
    394
    2
    Good idea about suggesting a LVDT, it's a nice application that gives good visual feedback on what is being accomplished by the DSP processing.

    We used long LVDT to measure travel on a linear actuator with a 12" stroke. It is amazing how accurate they can be. You excite the LVDT via it's primary winding with an AC voltage and by reading the phase and amplitude of the two secondary windings you can determine absolute position with very good precision. That would be a good application of DSP capabilities if you can find an affordable LVDT to play with.

    Here is an example of one on E-bay:

    http://cgi.ebay.com/Schaevitz-Linea...ryZ67003QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

    And it's data sheet:

    http://www.cdiweb.com/datasheets/schaevitz/HR-Series.pdf

    Good luck

    Lefty
     
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