US 12,444,036 B2
Brake disc wear degree measuring method, apparatus and device
Weilin Wang, Shenzhen (CN)
Assigned to AUTEL INTELLIGENT TECHNOLOGY CORP., LTD., Shenzhen (CN)
Appl. No. 18/256,212
Filed by Autel Intelligent Technology Corp., Ltd., Shenzhen (CN)
PCT Filed Nov. 25, 2021, PCT No. PCT/CN2021/133076
§ 371(c)(1), (2) Date Jun. 7, 2023,
PCT Pub. No. WO2022/121694, PCT Pub. Date Jun. 16, 2022.
Claims priority of application No. 202011453195.7 (CN), filed on Dec. 11, 2020.
Prior Publication US 2024/0020815 A1, Jan. 18, 2024
Int. Cl. G06T 7/00 (2017.01); G06T 7/50 (2017.01); G06T 7/70 (2017.01)
CPC G06T 7/0004 (2013.01) [G06T 7/50 (2017.01); G06T 7/70 (2017.01); G06T 2207/10028 (2013.01); G06T 2207/20024 (2013.01); G06T 2207/30252 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A brake disc wear degree measurement method, wherein the method comprises:
obtaining a brake disc image comprising a laser pattern;
extracting the laser pattern from the brake disc image, and generating a projection depth point cloud map of the laser pattern according to extracted laser pattern;
identifying the projection depth point cloud map by means of a point cloud map identification model to obtain a matching sample, which matches the projection depth point cloud map, in the point cloud map identification model, and determining a measurement feature of the matching sample as the measurement feature of the projection depth point cloud map, wherein the measurement feature comprises at least one of a position feature of an interference pattern and an image feature related to a measurement position;
determining a position of a reference point in the projection depth point cloud map according to the measurement feature, wherein the reference point is located in an unworn region, and the reference point is used as an identification point of a laser projection depth of the unworn region;
determining a position of a measurement point in the projection depth point cloud map according to the measurement feature, wherein the measurement point is located in a wear region, and the measurement point is used as an identification point of the laser projection depth of the wear region; and
determining, according to the position of the reference point and the position of the measurement point, a difference value of the laser projection depths of the reference point and the measurement point, wherein the difference value is used for representing a wear degree index of the brake disc.