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 .
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