| 摘要 |
FIELD: measurement equipment.SUBSTANCE: amplitude-frequency characteristic (AFC) is measured in a module of full conductivity (resistance) of the sample, and resonances are detected in the area of working frequency, at the same time in case there are additional resonances are available on the AFC of the free piezoceramic sample, apart from frequencies of mechanical and electromechanical resonances of the working mode of oscillations, mechanical damping is introduced into the mode of oscillations, having resonant frequency nearest to the working one, besides, damping is carried out in the field of maximum amplitude of damped oscillations, and at the same time the AFC of the sample is measured; additional resonances preservation on the AFC confirms availability of mechanical defects, and their disappearance confirms on absence of mechanical defects.EFFECT: provision of the possibility to monitor condition of piezoelement structure on the basis of analysis of additional resonances behaviour.3 dwg |
