| 摘要 |
Embodiments of the present invention provide an electromagnetic flow meter for monitoring the flow of a conducting fluid, the electromagnetic flow meter comprising a flow tube, a means for generating a substantially uniform magnetic field across the flow tube cross- section such that a first stage voltage is induced in the conducting fluid a sit flows through the flow tube, a means for generating a non-uniform magnetic field across the flow tube cross-section such that a second stage voltage is induced in the conducting fluid a sit flows through the flow tube, an array of voltage detectors configured to measure the induced first stage and second stage voltages and processing means for determining an actual axial velocity profile of the conducting fluid on the basis of the measured first stage voltage and on the basis of the measured second stage voltage. |
