federalnoe gosudarstvennoe byudzhetnoe obrazovatelnoe uchrezhdenie vysshego obrazovaniya "Izhevskij gosudarstvennyj tekhnicheskij universitet imeni M.T. Kalashnikova"
发明人:
Muraveva Olga Vladimirovna,Zlobin Denis Vladimirovich,Bogdan Olga Pavlovna,Muravev Vitalij Vasilevich
申请号：
RU20170125620
公开号：
RU2672774(C1)
申请日:
2017.07.17
申请国别(地区):
俄罗斯
年份:
2018
代理人:
摘要：
FIELD: physics.SUBSTANCE: using to measure the acoustic impedance of the medium. Summary of the Invention is that they carry out alternate immersion of the acoustic unit, made in the form of a piezoelectric plate that excites oscillations, into the investigated and reference medium, calculation of longitudinal and shear acoustic impedances on the basis of numerical values of the coefficients for the reference and study media. Next, measure the minimum voltage U,removed from the output of the acoustic block, the corresponding resonance frequency f, and the antiresonance frequency f, determined at the maximum voltage removed from the output of the acoustic unit when placed in the environment under study, the reference medium and air, further, by calculating the parameters of the equivalent electrical circuit of the piezoceramic plate, consisting of the capacitance C, in parallel connected with a chain of series connected capacitance C, inductance L, of the active resistance R, represented as two series-connecte
