| 摘要 |
<p>The apparatus consists of an arrangement of several magnets for fluid polarization and several NMR or EMR flow sensors aligned along a pipeline (10). The method is based on the fact that the individual components of the multi-component flow have different products of longitudinal relaxation time T1 and flow velocity v. In the preferred and illustrated embodiment, a static magnetic field H0 is imposed on the multi-component flow by means of a suitable magnet arrangement. In this magnet arrangement, the linear movement of the flow generates a multi-exponential gain of magnetization along the pipeline. By interrogating the multi-component flow at several positions in the magnet arrangement with suitable pulse techniques magnetization and velocity is measured simultaneously at several positions in the magnet arrangement. The gathered data permits reconstruction of the multi-exponential gain of magnetization and the determination of the equilibrium magnetization of each component in thermal equilibrium. This magnetization is a measure of the mass of each component present in the flow. Together with fluid velocity, this allows the determination of the mass flow rates of the individual components of the flow. <MATH></p> |
