초록 ▼

A sensor for measuring the mean velocity of fluid flow in a conduit senses flow velocities at a number of locations across the interior of the conduit to yield an accurate mean flow signal. The sensor includes a tubular housing which extends across the interior of the conduit. An electromagnet is ar

A sensor for measuring the mean velocity of fluid flow in a conduit senses flow velocities at a number of locations across the interior of the conduit to yield an accurate mean flow signal. The sensor includes a tubular housing which extends across the interior of the conduit. An electromagnet is arranged in the housing and produces an electromagnetic field in the fluid, the axis of the field extending normal to the direction of fluid flow. A plurality of electrodes are arranged in spaced relation along the length of the housing and in diametrically opposed pairs on opposite sides of the housing. The lines which pass through each electrode pair are arranged perpendicular to the direction of fluid flow. The electrodes produce electrical signals in response to the flow of fluid through the field, with each signal being a function of the velocity of fluid flow adjacent each electrode. The signals are combined to produce the mean flow velocity output signal.

대표청구항 ▼

Apparatus for measuring the average velocity of fluid flow in a conduit, comprising (a) generally tubular housing means extending across the interior of the conduit; (b) magnet means arranged within said housing means for generating in the fluid a magnetic field the axis of which extends normal to t

Apparatus for measuring the average velocity of fluid flow in a conduit, comprising (a) generally tubular housing means extending across the interior of the conduit; (b) magnet means arranged within said housing means for generating in the fluid a magnetic field the axis of which extends normal to the direction of fluid flow; (c) electrode means including a pair of parallel rods arranged adjacent the inner surface of said housing means and extending parallel to the axis of said housing means, said housing means containing a plurality of openings adjacent said rods, the portions of said rods adjacent said openings defining a plurality of electrodes arranged in spaced relation along the length of and adjacent the inner surface of said housing means, said electrodes including first and second electrodes arranged in diametrically opposed pairs relative to said housing means, the lines passing through the pairs of electrodes being arranged perpendicular to the direction of fluid flow, said electrodes producing electrical signals in response to the flow of fluid through said magnetic field, each of said signals being a function of the velocity of fluid flow adjacent each of said electrodes, respectively, whereby a plurality of discrete fluid flow velocity signals are generated simultaneously at a plurality of locations across the area of the conduit; and (d) amplifier means having first and second inputs connected with said first and second electrodes, respectively, for combining said electrical signals to produce an average flow velocity output signal.