| 摘要 |
FIELD: measurement equipment.SUBSTANCE: vibrations with a frequency changing discretely at the specified pitch in direct and reverse direction as per a symmetrical law in the range of variation of the measured resonant frequency are supplied regularly to a resonator input. A random signal is shaped, by means of which vibrations are modulated, which are supplied to the resonator input; an extreme value of amplitude-frequency response of the resonator and frequency corresponding to this extreme value is fixed during each half-period of these changes, and resonant frequency is determined as an average value of fixed frequencies of extreme values for n periods of the specified changes, which is calculated by the formula: n?(?/?)/8, where ?- a frequency tuning step of vibrations supplied to the resonator input; ?- required absolute error of determination of a resonant frequency. With that, a random signal is used for modulation of amplitude of vibrations supplied to the resonator input.EFFECT: higher measurement accuracy.3 cl, 3 dwg |
