公开(公告)号：WO2018229805A1

公开(公告)日：2018-12-20

申请号：PCT/IT2018/050097

申请日：2018-06-04

Applicant: PIRELLI TYRE S.P.A.

Inventor： CANTU', Marco ,  REGOLI, Fabio ,  BOFFA, Vincenzo ,  TERSI, Luca

IPC: G01M17/02

Abstract: It is described a method for checking tyres, wherein it is provided : predisposing a tyre (3) to be checked having a rotation axis (20) and a surface; determining a shift (S) along an acquisition direction (5, 32) between an acquisition point (51) on the surface lying on a first radial plane and a position (42) occupied by the acquisition point (51) following a rotation of the tyre about the rotation axis (20), the position (42) lying on a second plane parallel to the first radial plane; projecting a linear laser beam on a linear portion of surface of the tyre (3), where the linear laser beam propagates on the second plane with a propagation direction (14) that is parallel to the acquisition direction (32); acquiring a matrix image (60) of a matrix portion of surface of the tyre (3) containing the linear portion of surface, where the matrix image contains a laser line reflected by the linear portion of surface; determining a sub-portion (63) of the matrix image (60) as a function of the determined shift (S), where the sub-portion of the matrix image contains the reflected laser line; processing the sub-portion (63) of the matrix image (60) for determining an elevation profile of the linear portion of surface.

公开(公告)号：WO2017093892A1

公开(公告)日：2017-06-08

申请号：PCT/IB2016/057184

申请日：2016-11-29

Applicant: PIRELLI TYRE S.P.A.

Inventor： BOFFA, Vincenzo ,  TERSI, Luca ,  BALLARDINI, Valeriano

IPC: G01M17/02

CPC classification number: G01M17/027

Abstract: Method and apparatus (18) for checking tyres (2) for vehicle wheels wherein it is provided to: feed a tyre (2) to be checked to a checking station (27) with a sidewall (11 ) of the tyre (2) laid on a supporting portion (36) of a rotating table (35), wherein the supporting portion (36) lies on a plane and the rotating table (35) has an axis of rotation (Z) perpendicular to said plane; and carrying out a centring operation adapted to align, in said plane, the axis of rotation (R) of the tyre (2) with the axis of rotation (Z) of the rotating table (35). The centring operation comprises the identification, in said plane, of the axis of rotation (R) of the tyre (2) by: a) acquisition of an image of the tyre (2) laid on said supporting portion (36) of the rotating table (35); b) definition, in the acquired image, of a number n of analysis directions α1, α2, intersecting at one selected central point (Pc), with n and i integers, n>1 and 1 ≤ i ≤ n; c) for each analysis direction αi' definition, in the acquired image, of a number m of potential axes of symmetry S i1 , S i2 ,.. s ij , S im , perpendicular to the analysis direction a\, where m and j are integers, with m>1 and 1 ≤ j ≤ m; calculation of a level of symmetry of the image with respect to each of said potential axes of symmetry S i1 , S i2 ,.. S ij ,.. S im , wherein said level of symmetry is indicative of the probability that the centre of the tyre (2) is on the respective potential axis of symmetry Si1, Si2, Sij, Sim; determination of a probability distribution Pal indicative of a variation of said level of symmetry along said analysis direction a,; d) determination of a centre of the tyre (2) on the basis of a cumulative probability distribution P merged obtained through a combination of the probability distributions P xi calculated for said analysis directions α 1 , α 2 ,.. α i ,...α n ) identification of the axis of rotation (R) of the tyre (2) in an axis that passes through said determined centre and perpendicular to said plane.

Abstract translation: 一种用于检查车轮的轮胎（2）的方法和设备（18），其中它被设置成：将待检查的轮胎（2）供给到具有侧壁（11）的检查站（27） ）布置在旋转台（35）的支撑部分（36）上，其中支撑部分（36）位于平面上并且旋转台（35）具有垂直于旋转轴线（Z）的旋转轴线 到所述飞机; 并进行适应于在所述平面中使轮胎（2）的旋转轴线（R）与旋转台（35）的旋转轴线（Z）对准的定心操作。 对中操作包括通过以下步骤在所述平面中识别轮胎（2）的旋转轴线（R）：a）获取放置在旋转的所述支撑部分（36）上的轮胎（2）的图像 表（35）; b）在获取的图像中定义在一个选择的中心点（Pc）处交叉的n个分析方向α1，α2，n和i整数n> 1和1≤i≤n; c）对于每个分析方向αi'在所获取的图像中定义数目为m的潜在对称轴S i1，S i2，s s， 垂直于分析方向a 1，其中m和j是整数，其中m> 1且1≤j≤m; 计算图像相对于每个所述潜在对称轴S i1，S i2，...，S ij的对称性水平。 其中所述对称程度表示轮胎（2）的中心位于相应的潜在对称轴线Si1，Si2，Sij，Sim上的概率; 确定指示沿着所述分析方向a的所述对称水平的变化的概率分布Pal， d）基于通过针对所述分析计算的概率分布P xi的组合获得的累积概率分布P merge，获得轮胎（2）的中心的确定 方向α1，α2，ααi，...αn，n）的轴的识别 的轮胎（2）在穿过所述确定的中心并垂直于所述平面的轴线上的旋转（R）

公开(公告)号：WO2018020415A1

公开(公告)日：2018-02-01

申请号：PCT/IB2017/054501

申请日：2017-07-25

Applicant: PIRELLI TYRE S.P.A.

Inventor： BOFFA, Vincenzo ,  TERSI, Luca ,  BALLARDINI, Valeriano

IPC: G01M17/02

Abstract: Method and station for checking a tyre (2) for vehicle wheels in a checking station (27). The checking station (27) comprises a background (49) with a support surface (36) lying on a plane perpendicular to a reference axis (Z), an image acquisition apparatus (47) to acquire at least one image (23) of the tyre arranged with a first outer lateral surface in contact with said support surface (37) and a second outer lateral surface (21) facing said image acquisition apparatus (47), an illumination system (50) and a computer (48) adapted to generate a working image (24) from said at least one acquired image (23) of the tyre. The method provides for the arrangement of the image acquisition apparatus (47), of the illumination system (50) and of the background (49) such as to generate a contrast, in said working image (24), between at least the entire second outer lateral surface (21) of the tyre and an area (22) circumferentially surrounding said tyre (2), said circumferentially surrounding area (22) corresponding to at least one part of the background (49), including at least one part of the support surface (36). The method also provides for the generation of the working image (24) from the acquired images and the processing of the working image (24) to carry out at least one checking procedure of the tyre (2) wherein the second outer lateral surface (21) of the tyre is distinguished from the circumferentially surrounding area (22) by means of said contrast.

Abstract translation: 用于在检查站（27）中检查轮胎（2）以用于车轮的方法和工位。 检验台（27）包括具有位于垂直于参考轴线（Z）的平面上的支撑表面（36）的背景（49），图像采集装置（47），用于采集至少一个图像（23） 轮胎，其布置有与所述支撑表面接触的第一外侧表面和面对所述图像采集装置的第二外侧表面;照明系统和计算机， 来自轮胎的所述至少一个采集图像（23）的工作图像（24）。 该方法提供图像采集装置（47），照明系统（50）和背景（49）的布置，以便在所述工作图像（24）中在至少整个第二 所述轮胎的外侧表面（21）和周向地围绕所述轮胎（2）的区域（22），所述周向周围区域（22）对应于所述背景（49）的至少一部分，所述至少一部分包括所述轮胎 支撑表面（36）。 该方法还提供从所获取的图像生成工作图像（24）以及处理工作图像（24）以执行轮胎（2）的至少一个检查程序，其中第二外侧表面（21） ）通过所述对比度与周向环绕区域（22）区分开来。

公开(公告)号：WO2017115230A1

公开(公告)日：2017-07-06

申请号：PCT/IB2016/057883

申请日：2016-12-21

Applicant: PIRELLI TYRE S.P.A.

Inventor： BOFFA, Vincenzo ,  REGOLI, Fabio ,  BALLARDINI, Valeriano ,  MONTI, Stefano ,  TERSI, Luca

IPC: B29D30/00 ,  G01M17/02

CPC classification number: B29D30/0061 ,  B29D2030/0066 ,  G01M17/027

Abstract: Method for managing a tyre checking apparatus, said apparatus (1) comprising : an optical structure (430) for said check, said optical structure (430) comprising at least a first optical tool (43a); a first member (40a) adapted to move said first optical tool (43a). Said tyre checking comprises at least a first sequence of checks executed on a first tyre in a first duration, followed by a second sequence of checks executed on a second tyre in a second duration. Said method comprises: executing, by means of said optical structure (430), a first check (C1) on said first tyre; executing, by means of said optical structure (430), a second check (C2) on said first or second tyre; wherein said first check (C1) and said second check (C2) are separated by a time interval (T1) shorter than or equal to the sum of said first duration and second duration; wherein said first optical tool (43a) is not used for tyre checking during said time interval (T1); wherein said method comprises verifying said first optical tool (43a) during said time interval (T1). A tyre checking apparatus (1) is also described, adapted to operate according to said method.

Abstract translation: 一种用于管理轮胎检查设备的方法，所述设备（1）包括：用于所述检查的光学结构（430），所述光学结构（430）至少包括第一光学工具（43a）; 第一构件（40a），适于移动所述第一光学工具（43a）。 所述轮胎检查包括在第一持续时间内在第一轮胎上执行的至少第一检查序列，随后在第二持续时间内在第二轮胎上执行的第二检查序列。 所述方法包括：借助于所述光学结构（430）在所述第一轮胎上执行第一检查（C1）; 借助于所述光学结构（430）在所述第一轮胎或第二轮胎上执行第二检查（C2） 其中所述第一检查（C1）和所述第二检查（C2）以短于或等于所述第一持续时间和第二持续时间之和的时间间隔（T1）分开; 其中所述第一光学工具（43a）在所述时间间隔（T1）期间不用于轮胎检查; 其中所述方法包括在所述时间间隔（T1）期间验证所述第一光学工具（43a）。 还描述了一种轮胎检查设备（1），其适于根据所述方法进行操作。