公开(公告)号：US12100165B2

公开(公告)日：2024-09-24

申请号：US18223021

申请日：2023-07-17

申请人： PixArt Imaging Inc.

发明人： Keen-Hun Leong ,  Boon-How Kok ,  Dennis Dominic Donald

IPC分类号： G06T7/20 ,  B60W30/00 ,  B62D15/02 ,  G01C22/00 ,  G01C25/00 ,  G06F3/0362 ,  H04N23/90 ,  G01C21/26

CPC分类号： G06T7/20 ,  B60W30/00 ,  B62D15/024 ,  G01C22/00 ,  G01C25/00 ,  G06F3/0362 ,  H04N23/90 ,  G01C21/26 ,  G06T2207/30241 ,  G06T2207/30252

摘要： 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：US11748893B2

公开(公告)日：2023-09-05

申请号：US17509056

申请日：2021-10-24

申请人： PixArt Imaging Inc.

发明人： Keen-Hun Leong ,  Boon-How Kok ,  Dennis Dominic Donald

IPC分类号： G06T7/20 ,  B60W30/00 ,  B62D15/02 ,  G01C25/00 ,  G01C22/00 ,  H04N23/90 ,  G06F3/0362 ,  G01C21/26

CPC分类号： G06T7/20 ,  B60W30/00 ,  B62D15/024 ,  G01C22/00 ,  G01C25/00 ,  G06F3/0362 ,  H04N23/90 ,  G01C21/26 ,  G06T2207/30241 ,  G06T2207/30252

摘要： An optical sensor system mounted in a wheel arch of a car for determining trajectory of the car includes: a first optical sensor mounted in the wheel arch above a wheel and located behind a first clear casing that does not touch the wheel; and a second optical sensor mounted in the wheel arch on one side of the wheel and located behind a second clear casing that does not touch the wheel. The first optical sensor and second optical sensor perform a plurality of counts corresponding to respectively capturing a plurality of images of the wheel. The captured images are compared with a reference image to determine a 2D displacement of the wheel from its original position. The trajectory of the car is determined by calculating a turning degree of the wheel according to a trigonometric manipulation of the measured 2D displacement.

公开(公告)号：US11189036B2

公开(公告)日：2021-11-30

申请号：US16831825

申请日：2020-03-27

申请人： PixArt Imaging Inc.

发明人： Keen-Hun Leong ,  Boon-How Kok ,  Dennis Dominic Donald

IPC分类号： G06T7/00 ,  G06T7/20 ,  B60W30/00 ,  B62D15/02 ,  G01C25/00 ,  G01C22/00 ,  H04N5/247 ,  G06F3/0362 ,  G01C21/26

摘要： An optical sensor system mounted in a wheel arch of a car for determining trajectory of the car includes: a first optical sensor mounted in the wheel arch above a wheel and located behind a first clear casing that does not touch the wheel; and a second optical sensor mounted in the wheel arch on one side of the wheel and located behind a second clear casing that does not touch the wheel. The first optical sensor and second optical sensor perform a plurality of counts corresponding to respectively capturing a plurality of images of the wheel. The captured images are compared with a reference image to determine a 2D displacement of the wheel from its original position. The trajectory of the car is determined by calculating a turning degree of the wheel according to a trigonometric manipulation of the measured 2D displacement.