Research of Resonators of Increased Q-factor for Line Vibrational Density - Measuring Instruments of Pulps

摘要

This is dedicated to analysis of sensitive elements of vibrational measures of density of pulps - tubular resonators. Taking into account the fact that the main parameter, characterizing precision of measuring of vibrational measures of density is a good quality of resonators, the search of ways of lowering, and as far as possible full liquidation of reactive forces in places of fastening of resonator as the main source of lowering of good quality is conducted in this work. The uniform tubular resonator which is widely spread in vibrational measures of density, is analyzed in this work preliminarily. The generalized mathematical model of uniform tubular resonators is built and examined for this purpose. This found that the reactive forces in places of fastening of such resonators can be lowered only at the expense of reduction of absolute sensitivity of measuring of density the condition for choice of rational parameters of uniform tubular resonators of the increased good quality is found. Bat impossibility of full liquidation of reactive forces and necessity of transmittion to use of not uniform tubular resonators is based. With the purpose of getting concrete results, the heterogeneous resonators is suggested and analyzed. This resonator is made of the tube, which is toughly fastened at the ends and consists of there parts: central and two identical peripheral ones. As a results of analyze of mathematical model of this resonator, the conditions fulfillment of which will provide liquidation of reactive forces at places of fastening of resonator, are found.