两相流ECT系统的自寻增益数控放大器设计

Design of self-selecting gain digital-control amplifier for two-phase flow electrical capacitance tomography

在两相流电容层析成象(ECT)系统中,由于两相流体的多样性、流型及相分布的复杂性,使得被测介质的介电常数变化范围很大,这就要求采集处理电路的放大部分的增益具有宽量程来适应不同参数的两相流体.所提出的高精度自寻增益数控放大器,很好地解决了这些问题.

In twophase flow electrical capacitance tomography system, because of twophase flow's diversity,regimes, and complexity of component, it makes the object to be measured have wide range permittivity, which needs wide range for the gain of data collection and conditioning circuit's amplify part to adjust twophase flow of different phases. This paper puts forward a high precision and selfselecting gain digitalcontrol amplifier,and can resolve above problems.