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Online fruit weighing using a 500 MHz waveguide cavity

Online fruit weighing using a 500 MHz waveguide cavity

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A system for measuring the weight of apples and oranges moving along a conveyor belt is described. The system relies on the effect of the moisture in the fruit on the resonant frequency and the Q-factor of a resonant waveguide cavity.

References

    1. 1)
      • Kalinski, J.: `Self adjustable microwave homodyne system for on-line simultaneous attenuation and phase measurements', 7th European Microwave Conf., 1977, Copenhagen, p. 267–272.
    2. 2)
      • G.E. Schafer , R.R. Bowman . A modulated subcarrier technique of measuring microwave attenuation. Proc. IEE
    3. 3)
      • Kalinski, J.: `A method and circuit for microwave attenuation measurements under industrial conditions', 1976, Doctoral thesis, IPPT-P.A. of Sciences, Warszawa, Poland.
    4. 4)
      • J. Kalinski . Automatic phase control system for microwave industrial on-line moisture-attenuation-voltage/MAV/converter. IEEE Trans.
    5. 5)
      • G.E. Schafer . A modulated subcarrier technique of measuring microwave phase shift. IRE Trans.
    6. 6)
      • A. Kraszewski , S. Kulinski . An improved microwave method of moisture content measurement and control. IEEE Trans.
    7. 7)
      • J. Kalinski . Further possibilities of the modulated subcarrier techniques for microwave attenuation measurements in industrial applications. IEEE Trans.
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