公开(公告)号：US20240336092A1

公开(公告)日：2024-10-10

申请号：US18681555

申请日：2022-08-01

Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN

Inventor： SIMON NUYTTEN ,  DENIS ALFF ,  DENIS MARTIN

IPC: B60C11/24 ,  B60C19/00 ,  B60C23/06

CPC classification number: B60C11/246 ,  B60C19/00 ,  B60C23/064 ,  B60C2019/004

Abstract: A method for ascertaining the deformation of a tire comprises: fastening a sensor to the tire so as to generate an accelerometric signal in the direction normal to the crown; acquiring (201) a temporal wheel-turn signal SigTDR (101) comprising the amplitude of the acceleration while rolling; determining a reference speed Wreference (202) associated with a portion of the wheel-turn signal SigTDR; normalizing (203) the portion of the wheel-turn signal SigTDR by a variable which is a function F proportional to the square of Wreference; angularly resampling (204) the portion of the wheel-turn signal SigTDR; defining an energy density S (205) from the angularly resampled normalized wheel-turn signal SigTdR using a threshold A; and identifying the deformation of the tire Def % (206) as a function G of the energy density S.

公开(公告)号：US20220080790A1

公开(公告)日：2022-03-17

申请号：US17416950

申请日：2019-12-16

Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN

Inventor： DENIS ALFF

IPC: B60C23/06

Abstract: A method for obtaining the deformation of a tire casing subjected to a load, rotating at a rotational speed W, comprising: Phase 1—Delimiting the first signal over a whole number of wheel revolutions to construct a first wheel revolution signal; and Determining a reference acceleration; and Phase 2—Delimiting the signal over a whole number of wheel revolutions to construct a second wheel revolution signal; Defining at least a first energy density S which is a function of the second wheel revolution signal, and of the reference acceleration, and which is denoted S+ when the wheel revolution signal is above a threshold value A, or is denoted S− when the wheel revolution signal is below or equal to said threshold value A; and Identifying the deformation as a function of the reference acceleration and of the first energy density S.

公开(公告)号：US20220080789A1

公开(公告)日：2022-03-17

申请号：US17416872

申请日：2019-12-16

Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN

Inventor： DENIS ALFF

IPC: B60C23/06

Abstract: A method for obtaining the deformation of a tire casing subjected to a load, rotating at a rotational speed W, comprises the following steps: acquiring a signal comprising the amplitude of the acceleration in the direction normal to the crown when running at the rotational speed W; delimiting the signal over a number of wheel revolutions, so as to construct a wheel revolution signal; determining a reference acceleration; defining a first energy density S which is a function of the wheel revolution signal, and of the reference acceleration, and which is denoted S+ when the wheel revolution signal is above a threshold value A, or is denoted S− when the wheel revolution signal is below or equal to said threshold value A; and identifying the deformation generated by the load as a function of the reference acceleration and of the first energy density S.

公开(公告)号：US20240270032A1

公开(公告)日：2024-08-15

申请号：US18681574

申请日：2022-08-01

Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN

Inventor： SIMON NUYTTEN ,  DENIS ALFF ,  DENIS MARTIN

IPC: B60C23/06 ,  G01G19/08

CPC classification number: B60C23/064 ,  G01G19/08

Abstract: Ascertaining the load applied to a pneumatic tyre, comprising the following steps:



Fastening a sensor to the tyre so as to generate an acceleration along the normal to the crown;
Acquiring (201) a temporal signal SigTDR (101) comprising the amplitude of the acceleration while rolling;
Determining a speed Wreference (202) associated with a portion of the signal SigTDR;
Normalizing (203) the portion of the signal SigTDR by a variable which is a function F proportional to the square of Wreference.
Angularly resampling (204) the portion of the signal SigTDR;
Defining (205) an energy density S, by means of a threshold A or a spectral variable B, by spectral analysis, from the resampled normalized signal SigTDR;
Identifying (206) the deformation Def % as a function G of S or of β;
Identifying (207) the load Z by the function H of Def %.

公开(公告)号：US20230041164A1

公开(公告)日：2023-02-09

申请号：US17784277

申请日：2020-12-10

Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN

Inventor： DENIS ALFF

IPC: B60C11/24 ,  B60C23/04 ,  B60C19/00

Abstract: A method for obtaining the distance travelled by a tire comprises fixing a sensor, to the right of the crown with a radial position Rc, capable of generating a signal proportional to the acceleration experienced; rolling the tire at a rotation speed W, subject to a load Z; acquiring, after a time T, a first signal Sigi comprising the acceleration amplitude in the direction normal to the crown, wherein the values below a threshold N represent less than 40 percent of the length of the first signal; identifying a reference value Vireference, being the square root of the average value of the first signal Sigi; and determining the distance travelled D during the time T from the following formula: D=A*T*Vireference, where A is proportional to the square root of the rolling radius of the tire.