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Mathematical model of a sensing device based on piezo resonator with changeable electrode gap is further developed. Dependences of resonance frequency and conductivity of the piezoelectric sensing device on parameters of movable electrode formed by a cylindrical surface for which one of hyperbole branches serves as guide are obtained. Grading characteristics in the form of dependence of frequency...
This paper suggests an autonomous oscillation control loop for frequency read-out-type resonant sensors that produces outputs of variable frequency depending on the input of an external physical quantity. The design goal of the oscillation loop is simultaneously to stabilize the resonance characteristics of the sensor and to automatically track the resonant frequency in order to guarantee highly reliable...
In this paper the mathematical model to research a conveyer weigher work is suggested and the recommendations on the wegher's constructive parameters for the developers are given.
This paper outlines the process for estimating measurable parameters in a multi degree of freedom micro resonator. Thermal mechanical noise provides a baseline limit for frequency resolution of micro resonators. We develop the likelihood function for a linear regression model of 2 degree of freedom resonator. Using the Cramer-Rao inequality we determine the minimum possible covariance to estimate...
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