| 摘要 |
A flowmeter (10) for measuring the velocity of a fluid employs a circuit for producing a magnetic field transverse to the direction of fluid velocity A, thereby inducing a voltage potential in the fluid. At least two electrodes (40), in electrical contact with the fluid and spaced apart along a line transverse to the direction of the fluid velocity, are responsive to the induced voltage potential. A signal processing circuit, that is responsive to the two electrodes, generates a velocity signal representative of the magnitude of the velocity of the fluid. A circuit periodically grounds the two electrodes (40), thereby eliminating any residual charge that builds up on the electrodes.
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