초록 ▼

A flow meter for measuring the velocity of fluid flow in a conduit is disclosed, characterized in that an electromagnetic sensor probe is mounted within an opening contained in the conduit for generating electrical signals as a function of the velocity of fluid flow. The probe has a debris shedding

A flow meter for measuring the velocity of fluid flow in a conduit is disclosed, characterized in that an electromagnetic sensor probe is mounted within an opening contained in the conduit for generating electrical signals as a function of the velocity of fluid flow. The probe has a debris shedding head portion which protrudes into the interior of the conduit and includes an electromagnet for generating an electromagnetic field in the fluid, the axis of the field extending normal to the direction of fluid flow. The probe further includes a plurality of electrodes arranged beyond the poles of the electromagnet and adjacent the fluid for producing the electrical signals in response to the flow of fluid through the electromagnetic field. Signal processing apparatus is connected with the sensor probe for converting the electrical signals into a flow velocity output signal.

대표청구항 ▼

A flow meter for measuring the velocity of fluid flow in a conduit, comprising (a) a generally cylindrical electromagnetic sensor probe means for generating electrical signals as a function of the velocity of fluid flow within the conduit, said probe means including a probe head and a body portion;

A flow meter for measuring the velocity of fluid flow in a conduit, comprising (a) a generally cylindrical electromagnetic sensor probe means for generating electrical signals as a function of the velocity of fluid flow within the conduit, said probe means including a probe head and a body portion; and (b) means for mounting said probe means within an opening contained in the conduit with a portion of said probe head protruding into the interior of the conduit and with the longitudinal axis of said probe means extending normal to the direction of fluid flow in the conduit, the probe head portion protruding into the interior of the conduit defining a debris shedding surface facing the fluid flow and arranged at an angle other than normal to the direction of fluid flow, whereby debris is prevented from accumulating thereon; (c) said probe means further including (1) electromagnetic means having a pair of poles for generating in the fluid an electromagnetic field the axis of which extends normal to the direction of flow; and (2) a plurality of electrodes mounted in said probe head portion for producing said electrical signals in response to the flow of fluid through said electromagnetic field, said electrodes being arranged beyond the poles of said electromagnetic means and comprising at least a pair of sensing electrodes symmetrically arranged relative to said field axis along a line transverse to the direction of fluid flow within the conduit.