High Velocity Measurment

Discussion in 'General Electronics Chat' started by vdd, Jan 5, 2007.

  1. vdd

    Thread Starter Member

    Nov 8, 2006
    11
    0
    Hi All,
    I want to know what r the methods of measuring high velocities.
    I know that the Radar guns are used to track the speed of Vehicles & in sports.
    These guns operate on the principle of Doppler's Effect.This shifted Doppler freq. is Digitally Signal processed with the help of various algorithms.
    Now my questions are:
    1)Which are the algorithms used and why?

    2)What techniques are used to measure very high speed such as speed of air craft , Velocity of a projectile (Muzzle velocity Measuremnt) etc.

    3)If Doppler Radars are used what freq. ranges are used and why?

    4)Which other parameters need to be considered?

    5)What DSP techniques are used and why?

    Please find the answers for the above questions.

    Regards,
    vdd
     
  2. Dave

    Retired Moderator

    Nov 17, 2003
    6,960
    144
    To start you off for DSP algorithms and techniques, the core technique at the very heart of DSP is the Fourier Transform. In algorithmic form, this is mainly implemented as the Fast Fourier Transform (FFT) on DSP-chips. You should also aquaint yourself with convolution as the core technique for signal processing of two signals. Another point to remember is that DSP-chip perform 3 core functions very effeciently:

    1. Add
    2. Subtract
    3. Multiply

    For detailed information about these techniques see Steve Smiths DSP Guide.

    Dave
     
  3. mrmeval

    Distinguished Member

    Jun 30, 2006
    833
    2
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