×

Magnetic flowmeter

  • US 5,551,306 A
  • Filed: 12/06/1994
  • Issued: 09/03/1996
  • Est. Priority Date: 12/06/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. A flowmeter for measuring the velocity of a fluid, comprising:

  • a. means for producing a magnetic field transverse to the direction of fluid velocity thereby inducing a voltage potential in the fluid;

    b. two primary electrodes in electrical contact with the fluid, spaced apart along a first line transverse to the direction of the magnetic field and transverse to the direction of the fluid velocity a first potential between said primary electrodes corresponding to the induced voltage potential and any background voltage potential therebetween;

    c. two secondary electrodes in electrical contact with the fluid, spaced apart along a plane, the plane being parallel to the direction of the magnetic field and also parallel to the direction of the fluid velocity, a second potential between said secondary electrodes corresponding to any background voltage potential therebetween; and

    d. signal processing means, responsive to said primary electrodes and said secondary electrodes that subtracts the secondary voltage potential of the secondary electrodes from the primary voltage potential of the primary electrodes for generating a velocity signal representative of the magnitude of the velocity of the fluid.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×