Ultrasonic flow meter using obliquely directed transducers
First Claim
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1. A transducer device for ultrasonic measurement of flow velocity of fluid in a pipe, comprising:
- at least a first and second transducer each disposed on opposite sides of said pipe;
said second transducer being located downstream from said first transducer;
said transducer transmitting and receiving sonic pulses about center axes thereof, wherein the center axes are deviated upstream from an imaginary line connecting said transducers.
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Abstract
A transducer system and method is provided for ultrasonic measurement of the flow velocity of a fluid in a pipe. Two transducers are mounted on opposite sides of a pipe, the second transducer being downstream from the first. The two transducers alternately transmit and receive ultrasonic pulses along respective center axes which are deviated upstream from an imaginary line connecting the transducers.
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Citations
9 Claims
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1. A transducer device for ultrasonic measurement of flow velocity of fluid in a pipe, comprising:
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at least a first and second transducer each disposed on opposite sides of said pipe; said second transducer being located downstream from said first transducer; said transducer transmitting and receiving sonic pulses about center axes thereof, wherein the center axes are deviated upstream from an imaginary line connecting said transducers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of ultrasonic measurement of flow velocity of a fluid along a flow axis in a pipe, comprising the steps of:
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mounting at least a first and second transducer on opposite sides of said pipe, said second transducer being mounted downstream from said first transducer; alternately transmitting and receiving sonic pulses about center axes of said transducers, said center axes being deviated upstream from an imaginary line connecting said transducers; and calculating the velocity of the fluid using the formula;
##EQU2## where;
U is the mean flow velocity along the flow axis of the pipe,D is the pipe diameter, θ
is the angle between the imaginary connecting line and the flow axis,t23 is the downstream transit time, and t32 is the upstream transit time.
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Specification