基于多参数传输油罐液位测量方法的研究

Study of Level Measurement on Oil Tank Based on Multivariable Transmission

本文介绍一种双差压法测量油罐液位的原理 ,指出影响液位测量误差的主要原因是温度和压力 ,并给出了温度与压力对液体密度影响的数学模型 ,有效地解决多参数在同一通道中的传输问题 ,从而克服了密度变化和自身压力引起的误差 。

The principle of oil tank level measurement bases on double-difference pressure is introduced in this paper. It points out that the temperature and pressure are the main factors that affects the error of the measurement. and it presents math. model that corrects the influence of temperature and pressure affecting on the density of liquid. So that resolve effectively the synchronous question about launching and receiving of multivariable in transmitting. Then it overcome the errors for density variety and the pressure in itself. Which improves the accuracy of the measurement.