数字式射频导纳物位仪的研究与开发

Research and Development of Digital RF Admittance Level Meter

分析了电容式物位测量仪挂料产生的原因及其对测量的影响,提出采用斩波积分方法消除或减小挂料影响,提高信噪比,设计了基于MSP430F149的数字式射频导纳物位仪,并给出了硬件原理框图。

Through analyzing the reasons which causing probe attachment and the effects on the measure re-sult , a chopper integral method was proposed to eliminate or reduce the probe attachment influence so that sig -nal noise ratio can be improved;and a MSP430F149-based digital RF admittance level meter was developed , including hardware block diagram .