Gas/liquid ultrasonic flowmeter
First Claim
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1. An ultrasonic flowmeter having a measurement tube through which a fluid flows and having ultrasonic transducers operable as transmission transducers and reception transducers, comprising:
- the ultrasound transducers being attached to a first sidewall of the measurement tube at a predetermined spacing from one another, and the ultrasound transducers having an associated principal ultrasound direction of transmitted ultrasound waves that defines a "W"-shaped ultrasonic path in the measurement tube;
the measurement tube having a second sidewall opposed to the first sidewall, the "W"-shaped ultrasonic path defining a plurality of reflection locations on said first and second sidewalls relative to the transmitted ultrasound waves, and the second sidewall having convex area for dispersing a part of the transmitted ultrasound waves that departs from the principal ultrasound direction; and
the measurement tube having at least one concave area in at least one of the reflection locations of the first and second sidewalls of the measurement tube for providing a focusing effect of the ultrasound waves that are transmitted along the "W"-shaped ultrasonic path.
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Abstract
Improvement to a gas/liquid ultrasonic flowmeter in which focusing profiling (501, 502, 503) is provided in the measurement tube thereof for at least one of the plurality of reflection points of the ultrasonic path (21) of the useful signal, in such a manner that the beam of this beam path (21) is concentrated onto the surface of the reception transducer (FIG. 3 ). If required, the focusing reflection is provided for the path of the ultrasonic radiation (22) of the substantial interference signal component.
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Citations
8 Claims
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1. An ultrasonic flowmeter having a measurement tube through which a fluid flows and having ultrasonic transducers operable as transmission transducers and reception transducers, comprising:
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the ultrasound transducers being attached to a first sidewall of the measurement tube at a predetermined spacing from one another, and the ultrasound transducers having an associated principal ultrasound direction of transmitted ultrasound waves that defines a "W"-shaped ultrasonic path in the measurement tube; the measurement tube having a second sidewall opposed to the first sidewall, the "W"-shaped ultrasonic path defining a plurality of reflection locations on said first and second sidewalls relative to the transmitted ultrasound waves, and the second sidewall having convex area for dispersing a part of the transmitted ultrasound waves that departs from the principal ultrasound direction; and the measurement tube having at least one concave area in at least one of the reflection locations of the first and second sidewalls of the measurement tube for providing a focusing effect of the ultrasound waves that are transmitted along the "W"-shaped ultrasonic path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification