公开(公告)号：US20230386050A1

公开(公告)日：2023-11-30

申请号：US18223021

申请日：2023-07-17

Applicant: PixArt Imaging Inc.

Inventor： KEEN-HUN LEONG ,  BOON-HOW KOK ,  DENNIS DOMINIC DONALD

IPC: G06T7/20 ,  B60W30/00 ,  B62D15/02 ,  G01C25/00 ,  G01C22/00 ,  H04N23/90 ,  G06F3/0362

CPC classification number: G06T7/20 ,  B60W30/00 ,  B62D15/024 ,  G01C25/00 ,  G01C22/00 ,  H04N23/90 ,  G06F3/0362 ,  G01C21/26

Abstract: An optical sensor system for determining trajectory of a wheel includes: a wheel mounted in a wheel arch having an outer surface covered with evenly-spaced wheel treads; an optical sensor mounted in the wheel arch but not touching the wheel, for performing a plurality of counts corresponding to respectively capturing a plurality of images of the wheel according to the wheel treads, and comparing the captured images with a reference image to determine a 2D displacement. The optical sensor further performs a calculation to convert the measured 2D displacement of the wheel from its original position into a distance the wheel travels along a path in order to determine the wheel trajectory.

公开(公告)号：US20190026903A1

公开(公告)日：2019-01-24

申请号：US16140444

申请日：2018-09-24

Applicant: PixArt Imaging Inc.

Inventor： KEEN-HUN LEONG ,  BOON-HOW KOK ,  DENNIS DOMINIC DONALD

IPC: G06T7/20 ,  G06F3/0362 ,  B60W30/00 ,  B62D15/02

Abstract: An optical sensor system for determining trajectory of a car, the optical sensor system being mounted in a wheel arch of the car, includes: a plurality of optical sensors mounted in the wheel arch above a wheel, the optical sensors being located behind a plurality of clear casings that do not touch the wheel, for performing a plurality of counts corresponding to respectively capturing a plurality of images of the wheel according to an outer surface of the wheel evenly covered with wheel treads. The captured images are compared with a reference image to determine a 2D displacement of the wheel from its original position. This measured 2D displacement is converted into a distance the wheel travels along a path, and the wheel trajectory is determined by calculating a turning degree of the wheel according to a trigonometric manipulation of the captured 2D displacement.