| 摘要 |
<p>The flowmeter (1), of the mass type, has two propellers (3,4), coupled by a spring (5). A detector (7) is associated with each propeller. A permanent magnet (6) is mounted on at least two blades of each propeller. The temporary shift of the blades is measured for the pairs of blades, with magnets. One pair of blades and the following pair may be cascaded. The detectors may detect the magnets on the blades. The signal produced by the magnets of one set of blades may have different amplitudes from those produced by the other propeller. The fluid flow (F) may cause the propellers to rotate. The detectors may be coils, in which the magnets induce voltages.</p> |
