The mechanical stresses measuring methods analysis is showing in that paper. The purpose of that paper is to choosing the practical method of the measuring mechanical stresses in polymer glasses during its using. The calculation of the piezoelectric effect on the polycarbonate is considering in that paper. It is showing that this effect can be used for measuring the mechanical stress in polymer glasses during its using. So, it is showing the advantages of that method.

Keywords: polymer glasses, mechanical stresses, polycarbonate, piezoelectric effect, possibility of applying, comparative analysis of the methods

In this article the methods of diagnosing the patient's condition from biologically active points analyzed, special attention is paid to one of the main problems of contact diagnostic methods, namely, the reliability of diagnostics; the preferred method of measurement, associated with the change in the probe oscillation depending on the change in the load characteristics, is the self-oscillation method. The purpose of the research is to identify the load characteristics corresponding to the best diagnostic reliability. To achieve this goal, the maximum deviation of the established self-oscillator’s frequency is determined for various changes in the load characteristics determined by biologically active points. It considered about the influence of the deviation of the established self-oscillator’s frequency on the reliability of the diagnosis. The result showed that the change in capacitance could be more informative than the change in resistance, which is due to the large value of the dynamic range of the frequency variation of the self-oscillator.

Keywords: self-oscillation method, diagnostics on bio-active points, the established self-oscillator’s frequency, oscillatory circuit, dynamic range, reliability of diagnostics