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THE ANALYSIS OF FREQUENCY DIFFERENCE SIGNAL SPECTRUM OF AN INSTRUMENT MEASURING THICKNESS OF FRESH ICE WITH FREQUENCY-MODULATED SIGNAL

V. V. Yezersky, PhD, full professor, department of RCS, RSREU; This email address is being protected from spambots. You need JavaScript enabled to view it.
I. V. Baranov, PhD (technical sciences), leading engineer, «KONTAKT-1» enterprise LTD; This email address is being protected from spambots. You need JavaScript enabled to view it.
V. A. Bolonin, leading engineer of «KONTAKT-1» LTD enterprise; This email address is being protected from spambots. You need JavaScript enabled to view it.
V. M. Davydochkin, PhD (technical sciences), the chief of department of microwaves, «KONTAKT-1» enterprise LTD; This email address is being protected from spambots. You need JavaScript enabled to view it.

The problem of the analysis of frequency difference signal spectrum of an instrument measuring thickness of fresh ice with frequency-modulated signal is considered. The aim of the work is to find out the features of spectrum allowing to define reliably the degree of danger being on ice for a person or a vehicle doing some work as well as simultaneously to measure ice thickness. By means of numerical modeling on the basis of theoretical formulas possible parities of amplitudes of separate components of the reflected signal in various typical situations in practically the whole range of ice thickness are defined. The comparison with experimentally received spectra of difference frequency signal is carried out and recommendations about criteria of detection of dangerous situations are formulated.

Keywords: measurement of fresh ice thickness, frequency modulated range finder, dangerous situations, criteria of detection.

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