US 12,436,165 B2
Method and device for measuring fluid in target pipeline
Yinhai Zhu, Beijing (CN); Peixue Jiang, Beijing (CN); and Yusen Wang, Beijing (CN)
Assigned to Tsinghua University, Haidian District (CN)
Filed by Tsinghua University, Beijing (CN)
Filed on Mar. 30, 2023, as Appl. No. 18/193,383.
Claims priority of application No. 202210339897.5 (CN), filed on Apr. 1, 2022.
Prior Publication US 2023/0349943 A1, Nov. 2, 2023
Int. Cl. G01P 5/00 (2006.01); G01P 5/14 (2006.01); G01P 5/20 (2006.01); G01P 5/26 (2006.01); G06T 5/70 (2024.01); G06T 7/246 (2017.01)
CPC G01P 5/26 (2013.01) [G01P 5/001 (2013.01); G01P 5/14 (2013.01); G01P 5/20 (2013.01); G06T 5/70 (2024.01); G06T 7/246 (2017.01)] 16 Claims
OG exemplary drawing
 
1. A method for measuring fluid in a target pipeline, comprising:
obtaining a working medium temperature and a working medium pressure of the fluid at a front end and/or a rear end of the target pipeline;
determining a target laser incidence mode in a plurality of laser incidence modes based on the working medium temperature and the working medium pressure, wherein a laser has different incidence angles in different laser incidence modes;
controlling the laser to emit a laser light based on the target laser incidence mode;
obtaining, when the fluid flows in the target pipeline, a first sampling image set of a tracer particle cluster in the fluid passing the front end of the target pipeline and a second sampling image set of the tracer particle cluster passing the rear end of the target pipeline, wherein images in the first sampling image set and the second sampling image set are images obtained when the laser excites the tracer particle cluster to scatter;
obtaining, based on the first sampling image set and the second sampling image set, passing time distribution information of the tracer particle cluster passing through the target pipeline; and
obtaining a mean residence time of the fluid in the target pipeline based on the passing time distribution information.