| 摘要 |
<p>The vortex flowmeter includes a body having a passage for flow of a fluid therethrough in a longitudinal direction, and a vortex generator positioned in the passage for transmitting vortices downstream. A first vortex sensor is located at a first sensor positioned downstream of the vortex generator. The first vortex sensor produces a first signal of the vortex frequency, in response to passage of vortices through the first sensor position. A second vortex sensor is located at a second sensor position downstream of the vortex generator, and produces a second signal of the vortex frequency, in response to passage of vortices through the second sensor position. The second signal is phase delayed from the first signal. A measured phase difference between the first signal and the second signal is determined. The measured phase difference is compared to a calibration phase difference representing the phase difference between the first sensor position and the second sensor position wing under pre-operational, calibration conditions. A corrected vortex frequency, of the flow meter is determined during operation in response to a ratio of the predetermined calibration phase difference to the measured phase difference.</p> |
