METHOD OF DETERMINING ELECTROMECHANICAL COUPLING COEFFICIENT OF PIEZOELECTRIC MATERIALS

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to determine the physical and mechanical characteristics of u044du043bu0435u043au0442u0440u043eu0443u043fu0440u0443u0433u0438u0445 materials and can be used u0434u043bu00a0 u043eu043fu0440u0435u0434u0435u043bu0435u043du0438u00a0 properties u043fu044cu0435u0437u043eu044du043bu0435u043au0442 cylindrical materials. the purpose of u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 - improved accuracy by taking into account the dissipation of energy in the material sample.in the method u043eu0441u0443u0449u0435u0441u0442u0432u043bu00a0u044eu0442u0441u00a0 definition of frequency fs and fp resonance and u0430u043du0442u0438u0440u0435u0437u043e - u043du0430u043du0441u0430 respectively; measuring the quality q model and finding its u0442u0430u043du0441u0430 model at the frequencies of underlying spectra (: 2fs - fp)... (fs - 5fs) / q) (fs + fs / q)...fp, fs (fp - 5fp / q) and (fp + fp / q) (2fp - fs). the measured values of the controlled u0441u0443u0434u00a0u0442 characteristics model, 1).