1.前言本文描叙了一种在线、实时同时测量液体密度和粘度的仪器。测量粘度的许多装置都是测量轴对称体的扭转振荡的周期和常数。Nieuwoudt 及合作者提出了把阻尼系数和振动周期同液体的密度和粘度联系起来的理论。用于精密测量粘度的另一种技术就是采用扭转压电晶体方法。它把剪切粘度值与共振曲线的宽 1. Introduction This article describes an online, real-time measurement of liquid density and viscosity of the instrument. Many devices that measure viscosity measure the cycle and constant of torsional oscillations of an axisymmetric body. Nieuwoudt and co-workers put forward the theory of linking the damping coefficient and the vibration period to the density and viscosity of the liquid. Another technique for precision measurement of viscosity is the use of torsional piezoelectric crystals. It sets the shear viscosity value to the width of the resonance curve