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Method and apparatus for inspecting tires in a production line

A production line and tire technology, applied in the direction of automobile tire testing, vehicle testing, optical devices, etc., can solve the problem of inapplicable and effective distinction between three-dimensional elements and two-dimensional elements

Active Publication Date: 2020-08-28
PIRELLI TYRE SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0027] The applicant has also realized that the inspection method described in US 2004 / 0212795 A1 by optically acquiring two-dimensional images (in which method an image acquired with illumination from the left and an image acquired with illumination from the right is combined form optimized images that are complete with respect to overexposed and underexposed regions respectively) are not suitable for effectively distinguishing between 3D and 2D elements

Method used

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  • Method and apparatus for inspecting tires in a production line
  • Method and apparatus for inspecting tires in a production line
  • Method and apparatus for inspecting tires in a production line

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Embodiment Construction

[0086] With reference to the accompanying drawings, reference numeral 1 generally indicates an apparatus for inspecting tires in a tire production line according to the invention. In general, the same reference numerals will be used for possible variants of similar elements.

[0087] The apparatus 1 comprises a support 102 adapted to support a tire 200 on one side wall and to rotate said tire about its axis of rotation 201 , said support being typically arranged according to a vertical direction. The support 102 is typically actuated by kinematic means, which are not further described and shown, since said kinematic means may eg be of a known type. The support for the tire may be configured for blocking said tire, eg correspondingly abutting against a bead.

[0088] Preferably, the device comprises a detection system 104 comprising a linear camera 105 with an objective line 106 lying on an optical plane 107 through which the linear camera passes. The invention also contempla...

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Abstract

Method and related apparatus for inspecting tires in a tire production line, comprising alternately illuminating a surface portion of a tire with first and second glancing light radiation, and obtaining first and second two-dimensional digital images, respectively, of the illuminated surface portion , where for each point (P, P') of the surface portion, the respective total optical powers of the first and second optical radiation incident at that point come from the two half-spaces opposite with respect to the optical plane (107) , the optical plane passing through the perpendicular to the surface at that point; and comparing the first and second images in order to obtain information about the altimetric profile of the surface portion.

Description

technical field [0001] The invention relates to a method and a device for inspecting tires in a tire production line, in particular by acquiring images of the tire surface and by subsequent processing, for example, for inspecting possible defects visible on the tire surface. Background technique [0002] "Tire" generally refers to a finished tire, ie after the molding step and the vulcanization step after the building step, but may also be a green tire after the building step and before the molding step and / or the vulcanization step. [0003] Typically, a tire has a substantially toroidal configuration about its axis of rotation during operation, and has an axial centerline plane perpendicular to the axis of rotation, which is usually a plane of (substantial) geometric symmetry (eg, ignoring possible Minor asymmetries, such as tread and / or internal construction design). [0004] The outer and inner surfaces of a tire refer respectively to the surface which remains visible a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/30G01M17/02G01B11/24
CPCG01B11/24G01B11/30G01M17/027G01N21/952G01N21/954G01N21/95607H04N23/56G01N21/8806G01N21/8851G06T7/001G06T2207/10024G06T2207/10028G06T2207/10152G06T2207/20224
Inventor V·波法V·巴拉迪尼G·卡萨迪奥·托齐B·蒙特鲁基奥
Owner PIRELLI TYRE SPA