公开(公告)号：US20220026311A1

公开(公告)日：2022-01-27

申请号：US17276979

申请日：2019-09-04

Applicant: A&D COMPANY, LIMITED

Inventor： Yukihisa ITO ,  Yoichi KANEKO ,  Kazuki KIDO ,  Kazuki OKAMOTO ,  Toru TSUDA

IPC: G01M17/02 ,  B60C11/03

Abstract: A tire testing apparatus of drum type includes a drum having, on a circumferential outer surface thereof, a sensor for measuring a ground contact force of a tire and a transparent portion; an image capturing device for capturing, from inside of the drum and through the transparent portion, an image of the ground contact surface of a tire; a ground contact force measurement processing unit which measures a ground contact force of a tire in planner contact with the sensor; a ground contact surface image capture processing unit which captures an image of the ground contact surface by the image capturing device when the tire comes into planner contact with the transparent portion; and a slip amount calculation unit which calculates a slip amount based on a displacement of a corresponding location which corresponds to a ground contact surface of the tire for which a measurement is made.

公开(公告)号：US20210302273A1

公开(公告)日：2021-09-30

申请号：US17346601

申请日：2021-06-14

Applicant: A&D COMPANY, LIMITED

Inventor： Yukihisa ITO ,  Yoichi KANEKO ,  Kazuki KIDO ,  Kazuki OKAMOTO ,  Toru TSUDA

IPC: G01M17/02 ,  G06T7/12 ,  G01L5/16 ,  G06T7/00

Abstract: A tire testing apparatus of a drum type includes: a drum including a transmission portion on an outer circumferential surface; an imaging device that images a ground contact surface of a tire from an inside of the drum via the transmission portion; a ground contact surface imaging processing unit that images, using the imaging device, the ground contact surface when the tire is brought into ground contact with the transmission portion; an edging processing unit that performs edging processing for image information of the imaged ground contact surface of the tire; a division processing unit that performs division processing for the image information subjected to the edging processing into regions which satisfy a predetermined resolution condition; a matching processing unit that performs matching processing by using the divided regions; and a slip amount calculation processing unit that calculates a slip amount and a ground contact surface moving amount.