3-Probe microwave measuring instrument of vibration of mechanical objects with non-plane surface


  • Oleg O. Drobakhin Dnipropetrovsk National University, Ukraine https://orcid.org/0000-0003-2624-9122
  • A. V. Doronin Dnipropetrovsk National University, Ukraine
  • V. V. Grigor’ev Dnipropetrovsk National University, Ukraine




microwave reflectometry, microwave holography, neural network, 3-probe sensor


Application of processing, which is specific to holographic concept with three reference signals, for complex reflection coefficient measurements by means of three-probe waveguide section is suggested. A mathematical model of diode detector on base of neural net is considered. The model provides a high level of square-law of output signal of detector and complex reflection coefficient measurements. The optimal model of neural net has structure of 1-4-1 neurons. For measurement of movement parameters estimation was done. As object of researches there was a metal concave and convex surface with various curvatures. For a decrease of a noise influence in the data, the Tikhonov’s regularization method was used. Efficiency of the method has been proved experimentally.


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