US 12,436,085 B2
Device and method for calibrating particle image velocimetry (PIV) image based on laser linear arrays
Shaofei Wang, Zhejiang (CN); Chong Pan, Ningbo (CN); and Jinjun Wang, Ningbo (CN)
Assigned to NINGBO INSTITUTE OF TECHNOLOGY, BEIHANG UNIVERSITY, Ningbo (CN)
Appl. No. 18/684,683
Filed by NINGBO INSTITUTE OF TECHNOLOGY, BEIHANG UNIVERSITY, Ningbo (CN)
PCT Filed Aug. 25, 2021, PCT No. PCT/CN2021/114416
§ 371(c)(1), (2) Date Feb. 18, 2024,
PCT Pub. No. WO2023/023961, PCT Pub. Date Mar. 2, 2023.
Prior Publication US 2024/0311977 A1, Sep. 19, 2024
Int. Cl. G01N 15/1433 (2024.01); G01N 15/00 (2006.01); G06T 5/60 (2024.01)
CPC G01N 15/1433 (2024.01) [G01N 15/00 (2013.01); G06T 5/60 (2024.01); G01N 2015/0003 (2013.01); G06T 2207/20084 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A device for calibrating a particle image velocimetry (PIV) image based on laser linear arrays, comprising:
a laser emission component configured to emit equidistant laser linear arrays to form a laser linear array light path;
an optical component configured to perform light splitting on laser rays in the laser linear array light path to form a laser grating in a test observation region;
a camera configured to acquire a distorted laser grating image when a working condition of a wind tunnel test section model is adjusted to a working condition of a PIV test, the test observation region being located above the wind tunnel test section model; and
a background processor configured to calibrate and restore the distorted laser grating image with a neural network-based distortion-restoring calibration algorithm to obtain a reconstructed laser grating image.