Title:
ANTI-PARALLEL TAG FLOW MEASUREMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO2002039804
Kind Code:
A3
Abstract:
A tag flow measurement system wherein a first and a second measurement path are provided across a flowing fluid, and a receiver in each path receives signals modulated by scatters in the fluid. The direction of signal propagation in one path faces in an opposite sense to, e.g., is anti-parallel to, the direction of propagation in the other path, and the two receiver outputs are correlated to determine a time interval representative of flow velocity. In one embodiment each path is defined by a transmitter on one side of the conduit and a receiver on the other side of the conduit, and the positions or orientations of transmitter and receiver are reversed in the second pair. Thus, the first transmitter may lie on the same side of the conduit as the second receiver, and the second transmitter may lie on the same side of the conduit as the first receiver. Diametral or chordal paths may be used.
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Inventors:
LIU YI
Application Number:
PCT/US2001/047334
Publication Date:
January 30, 2003
Filing Date:
October 30, 2001
Export Citation:
Assignee:
PANAMETRICS (US)
International Classes:
G01F1/7082; G01P5/22; G01F1/712; (IPC1-7): G01F1/66
Foreign References:
| US4528857A | 1985-07-16 | |||
| US5650571A | 1997-07-22 | |||
| US4787252A | 1988-11-29 | |||
| US6009760A | 2000-01-04 |
Other References:
See also references of EP 1332338A2
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