High Response Photon-Counting for Phase Fraction Measurement Using Compact-RIO with FPGA

Abstract

This paper presents the measurement of phase fraction of multiphase using LabVIEW/FPGA&RT. Phase fraction measurement is done by high-frequency gamma ray photons attenuation from multiple scintillation detectors without dead time between dwell intervals. This phase fraction measurement method is based on the differences in the linear or mass attenuation coefficient of components of each phase to light. The electromagnetic wave attenuation based on Beer-Lambert’s law gives the width of individual phases. Even though this method requires shielding, it has the advantages of penetrating through steel. Other phase fraction methods include differences in the permittivity of the components of phases. The voltage across the two electrodes kept opposite to each other determines the phase fraction. But, it has the disadvantages of requirements of special shielding for low capacitance and stray capacitance. Besides, the differences in the conductivity can measure the path resistance. This conductivity change gives phase fraction. Among the above volume—percentage measurement methods, former method is more accurate for industrial applications.