US 11,893,725 B2
Method for evaluating and system for detecting and evaluating geometric form of honeycomb product
Zhonggang Wang, Hunan (CN); Can Cui, Hunan (CN); Chong Shi, Hunan (CN); Xifeng Liang, Hunan (CN); Zhendong Li, Hunan (CN); Bo Sun, Hunan (CN); and Ziping Lei, Hunan (CN)
Assigned to CENTRAL SOUTH UNIVERSITY, Changsha (CN)
Appl. No. 17/422,721
Filed by CENTRAL SOUTH UNIVERSITY, Hunan (CN)
PCT Filed Aug. 18, 2020, PCT No. PCT/CN2020/109731
§ 371(c)(1), (2) Date Jul. 13, 2021,
PCT Pub. No. WO2021/227288, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 202010387864.9 (CN), filed on May 9, 2020; and application No. 202010388343.5 (CN), filed on May 9, 2020.
Prior Publication US 2023/0214986 A1, Jul. 6, 2023
Int. Cl. H04N 23/695 (2023.01); G06T 7/00 (2017.01); H04N 23/90 (2023.01)
CPC G06T 7/0006 (2013.01) [H04N 23/695 (2023.01); H04N 23/90 (2023.01); G06T 2207/20021 (2013.01); G06T 2207/30108 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for evaluating a geometric form of a honeycomb product, comprising steps of:
acquiring a top-surface image and a side-surface image of the honeycomb product;
acquiring vertex coordinates by extracting vertices from the top-surface image;
acquiring serial numbers of six vertices of each cell by reconstructing the cells of the top-surface image;
computing deviation angles of six interior angles of each cell based on the serial numbers and vertex coordinates of the six vertices of each cell;
extracting a top-surface side boundary and a side-surface side boundary of the honeycomb product from the top-surface image and the side-surface image;
computing a maximum top-surface deflection and a maximum side-surface deflection of the honeycomb product based on the top-surface side boundary and the side-surface side boundary;
judging whether the honeycomb product is qualified based on the deviation angles, the maximum top-surface deflection and the maximum side-surface deflection;
wherein the step of judging whether the honeycomb product is qualified based on the deviation angles, the maximum top-surface deflection and the maximum side-surface deflection comprises a step of:
judging the honeycomb product as qualified if geometric regularity of the honeycomb product judged based on the deviation angles, the maximum top-surface deflection and the maximum side-surface deflection reaches a preset standard;
wherein the geometric regularity comprises: top-surface cell regularity, side-surface flatness, and top-surface flatness, and
the step of judging the honeycomb product as qualified if the geometric regularity of the honeycomb product judged based on the deviation angles, the maximum top-surface deflection and the maximum side-surface deflection reaches the preset standard, comprises steps of:
judging the top-surface cell regularity based on the deviation angles,
judging the side-surface flatness based on the maximum top-surface deflection,
judging the top-surface flatness based on the maximum side-surface deflection, and
judging the honeycomb product as qualified if the top-surface cell regularity, the side-surface flatness and the top-surface flatness all reach preset standards.