Measuring and testing – Volume or rate of flow – By measuring electrical or magnetic properties
Patent
1991-11-04
1993-10-19
Chilcot, Jr., Richard E.
Measuring and testing
Volume or rate of flow
By measuring electrical or magnetic properties
7386115, G01F 160
Patent
active
052535371
ABSTRACT:
A magnetic flow meter according to this invention is composed of a sensor for sensing a flow rate of a fluid and a converter connected to the sensor via a signal cable. The sensor essentially consists of a measuring tube through which the fluid flows, a pair of opposed electrodes installed in the measuring tube so as to face each other, an exciting coil for generating a magnetic field and applying it to the measuring tube in a direction perpendicular to the centerline of the measuring tube, and a current signal transmitting circuit for converting a differential voltage across the pair of electrodes into a corresponding current signal. The converter is made up of a signal cable one end of which is connected to the current signal transmitting circuit and which transmits the current signal from the current signal transmitting circuit, and a converter to which the other end of the signal cable is connected and which converts the current signal transmitted over the signal cable into a flow signal representing the flow rate through the measuring tube.
REFERENCES:
patent: 3999443 (1976-12-01), Appel et al.
patent: 4103292 (1978-07-01), Haas
patent: 4147058 (1979-04-01), Matsushita
patent: 4357835 (1982-11-01), Kayama
patent: 4513624 (1985-04-01), McHale et al.
Bopp & Reuther, Magnetic-Inductive Standard Frequency Field with Preamplifier, Type MDM-NFV, Jul. 1988.
Okamoto Toshihiko
Tomita Toyofumi
Biegel R.
Chilcot Jr. Richard E.
Kabushiki Kaisha Toshiba
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