| 摘要 |
Apparatus for measuring the flow rate of a fluid (2) flowing through a pipeline according to the magnetoinductive measurement principle, having a measuring tube (3), having at least two measuring electrodes (8, 8a) for tapping off an induced voltage, on or in which measuring tube (3) components are adjacently arranged in the circumferential direction for the purpose of generating a magnetic field (11) which permeates the measuring tube perpendicular to the direction of flow of the fluid (2) and perpendicular to a connecting line through the at least two measuring electrodes (8, 8a), comprising at least four coils (10, 10a, 10b, 10c) with coil cores (14, 14a, 14b, 14c), at least two pole shoes (12, 12a) which are spatially separate from one another and are arranged on opposite sides of the measuring tube (3) based on the centre thereof, wherein at least two coils (10, 10a, 10b, 10c) are arranged in each case, together with at least one of the at least two pole shoes (12, 12a), in such a manner that at least one coil (10, 10a, 10b, 10c) is arranged in each case in the region of each of the two ends of a pole shoe (12, 12a), at least four feedback plates (13, 13a, 13b, 13c) which are spatially separate from one another and from the at least two pole shoes (12, 12a), wherein two feedback plates (13, 13a, 13b, 13c) are arranged in each case on both sides of one of the at least two pole shoes (12, 12a) in a mirror-symmetrical manner with respect to one another such that each of the at least two feedback plates (13, 13a, 13b, 13c) magnetically couples a first coil (10, 10a, 10b, 10c), which is arranged in the region of a first of the at least two pole shoes (12, 12a), and a second coil (10, 10a, 10b, 10c), which is arranged in the region of a second of the at least two pole shoes (12, 12a), to one another. |
