| 摘要 |
<p>Apparatus and method for mass flow measurement including means (25) for rotationally oscillating a substantially curved, preferably U-shaped conduit (14), solidly mounted in a cantilevered manner at the open ends of the legs (18, 20), and equipped with sensors (33, 33', 34, 34') which measure acceleration, velocity or position of each side leg (18, 20) of the conduit (14). The sensors (33, 33') are preferably velocity sensors, being each a magnet (42) and a coil (45). The coil (45) is translated in the uniform portion of the magnetic flux field, and the sensors (33, 33') produce analogue signal output which accurately correspond to the motion of the adjacent leg (18, 20). In the event of flow through the conduit (14), a change from coincidence in the time relationship of the two sensor signals relative to the divergent oscillations of each side of the conduit (14) caused by mass flow is measured in both directions of oscillation. Mass flow is determined as a function of such time separation of the signals.</p> |
