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1. 发明申请

US20150226589A1 X-Ray Based Multiphase Flow Meter with Energy Resolving Matrix Detector 审中-公开
公开(公告)号：US20150226589A1
公开(公告)日：2015-08-13
申请号：US14424440
申请日：2013-04-24
申请人： SIEMENS AKTIENGESELLSCHAFT
发明人： Gennadiy Karpinskiy , Stepan Polikhov , Reiner Franz Schulz
IPC分类号： G01F1/74 , G01T1/20 , G01N23/12
CPC分类号： G01F1/74 , G01F1/712 , G01N23/12 , G01N2223/423 , G01T1/2018
摘要： A method of X-ray based measurement of a multiphase flow components passing through a measurement tube comprises the steps of: directing a polychromatic photon beam generated by at least one X-ray source onto the measurement tube through which a multiphase flow is passed; locating a matrix detector behind the measurement tube along the beam, said matrix detector being a two-dimensional detecting structure comprising (mn) sensing elements and providing photon energy resolution, and exposing the measurement tube with multiphase flow by the X-ray pulses of a given duration and duty cycle; registering a polychromatic photon beam attenuated by said multiphase flow with an energy resolving matrix detector, whereas said matrix detector provides registration of a received photon beam according to different energy levels of the received photons and distribution of the received photons on energy levels according to spectral resolution of said matrix detector. A number of the energy levels registered by the matrix detector is defined as the ratio of maximum energy of the received photons to the spectral resolution of the array detector. A number of energy levels of interest is defined according to the number of components of said multiphase flow. For each X-ray pulse forming with the use of said matrix detector and in accordance with the defined number of energy levels a sequence of images of said multiphase flow, said images are characterized by pixel brightness; and determining from said formed sequence of images a volume content of each component of the multiphase flow basing on the value of the pixel brightness and in accordance with the law of absorption of X-ray emission. Then determining the flow rate of each component of the multiphase flow in the measuring tube in accordance with the cross-correlation analysis of the images formed by the matrix detector, and determining the volume flow rate of each phase of the multiphase flow as a product of the flow rate and the volume content of the phase.

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