Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Distributive type parameters
Patent
1994-09-30
1998-12-08
Do, Diep N.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Distributive type parameters
324644, 73290R, G01R 2704, G01F 2328
Patent
active
058475672
ABSTRACT:
A level sensor for use in a process application measures height of a product in a tank. The level meter includes a microwave feedhorn directed into the tank, an electronics housing spaced apart from the feedhorn and a microwave waveguide extending therebetween. A microwave transducer in the housing couples to the waveguide and sends and receives microwave signals. A microprocessor in the housing identifies echoes from the microwave signals which are generated and sensed by the microwave transducer. The microprocessor determines height of the product based upon a microwave echo from the product and a microwave echo from the feedhorn. The microprocessor compensates for the effect of propagation delay through the waveguide on height measurements with the feedhorn echo and provides an output related to height of the product in the tank.
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Edwards Grant B.
Kielb John A.
Longsdorf Randy J.
Palan Donald F.
Do Diep N.
Rosemount Inc.
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