| 摘要 |
A vortex flowmeter capable of measuring the flow rate of fluid flowing through a pipe bidirectionally or in a pulsating manner while measurement error is substantially nulled. The vortex flowmeter includes a first vortex-generating body 2a disposed within a pipe 1 for generating a Karman vortex m for a flow in one direction, a second vortex-generating body 2b disposed within the pipe 1 for generating a Karman vortex m for a flow in the opposite direction, and vortex detection means X and Y for detecting a Karman vortex generated by each of the vortex-generating bodies 2a and 2b. When applied to the case where backward flow is generated in fluid flowing through a pipe in a regular direction to thereby cause a pulsating flow, the vortex detection means X and Y detect the Karman vortexes, and subtraction is performed on output values represented, for example, by the number of pulses to thereby take into account the influence of backward flow on the regular flow, thereby determining an accurate flow rate.
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