Bead filler inspection apparatus, bead filler inspection program and bead filler inspection method

Patent metadata

Field	Value
Publication number	US-9384541-B2
Application number	US-201214233182-A
Country	US
Kind code	B2
Filing date	Jul 20, 2012
Priority date	Jul 20, 2011
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

An imaging device that captures an image of a specific region containing a boundary between an outer edge of the bead filler and a support body; an image processing device that detects an edge corresponding to the boundary between the outer edge of the bead filler and the support body based on an image captured by the imaging device, and that computes distances between a reference model line, that runs along the rotation direction of the support body and is determined based on a detected edge, and each respective point on the edge present in a region containing a join portion; and a control device that performs good/no-good determination on the join portion based on the distances between the reference model line and each of the points on the edge.

First claim

The invention claimed is:

1. A bead filler inspection apparatus comprising:
an imaging section that captures an image of a join portion of a bead filler formed by being wound onto a rotating support body and joined, and a region containing a boundary between an outer edge of the bead filler and the support body;
an edge detection section that detects an edge corresponding to the boundary between the outer edge of the bead filler and the support body based on an image obtained by the imaging section;
a computation section that computes distances between a reference model line, that runs along the rotation direction of the support body and is determined based on an edge detected by the edge detection section, and each respective point on the edge present in a region containing the join portion; and
a determination section that performs good/no-good determination on the join portion based on the distances.

2. The bead filler inspection apparatus of claim 1 , wherein:
the determination section determines that there is an opening in the bead filler join portion when there is a pair of left-right determination target edges present where the distance between the reference model line and each of the respective points on an edge present in the region containing the join portion exceeds a predetermined distance threshold value.

3. The bead filler inspection apparatus of claim 1 , wherein:
the determination section determines that one end of a member for forming the bead filler is misaligned in a width direction with respect to the other end of the member at the bead filler join portion when the determination target edge and the reference model line do not intersect with each other.

4. A bead filler inspection program that causes a non-transitory computer-readable medium to function as:
an edge detection section that, based on an image captured by an imaging section that captures an image of a join portion of a bead filler formed by being wound onto a rotating support body and joined and a region containing a boundary between an outer edge of the bead filler and the support body, detects an edge corresponding to the boundary between the outer edge of the bead filler and the support body;
a computation section that computes distances between a reference model line, that runs along the rotation direction of the support body and is determined based on an edge detected by the edge detection section, and each respective point on the edge present in a region containing the join portion; and
a determination section that performs good/no-good determination on the join portion based on the distances.

5. A bead filler inspection method that comprises:
a step for image capturing that captures an image of a join portion of a bead filler formed by being wound onto a rotating support body and joined, and a region containing a boundary between an outer edge of the bead filler and the support body;
a step for edge detecting that detects an edge corresponding to the boundary between the outer edge of the bead filler and the support body based on an image obtained by imaging during image capturing;
a step for computing that computes distances between a reference model line, that runs along the rotation direction of the support body and is determined based on an edge detected by the edge detecting, and each respective point on the edge present in a region containing the join portion; and
a step for determining that performs good/no-good determination on the join portion based on the distances.

Assignees

• Yoshimatsu Keisuke
• Sasaki Takahiro
• Bridgestone Corp

Inventors

• Yoshimatsu Keisuke
• Sasaki Takahiro

Classifications

• G01N21/8851

  Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges (G01N21/8806 and G01N21/93 - G01N21/95692 take precedence; optical measurement of dimensions G01B11/00; optical scanning G02B26/10; image transformation G06T3/00; computerised image enhancement G06T5/00; image processing per se for flaw detection G06T7/0002) · CPC title

• B29D30/48

  Bead-rings or bead-cores (from wire B21F37/00); Treatment thereof prior to building the tyre · CPC title

• G01M17/02

  Tyres · CPC title

• G06T7/0004 Primary

  Industrial image inspection · CPC title

• B29D30/0061

  Accessories, details or auxiliary operations not otherwise provided for · CPC title