JPH03158746A - Bottle body defect inspecting device - Google Patents

Abstract

PURPOSE:To detect a defect such as a stripe and a wrinkle in the surface of a bottle body surface by irradiating the body part of the rotating bottle and receiving the reflected light image from the body part continuously and linearly. CONSTITUTION:The bottle 1 which is conveyed is followed by a scanning mirror 3 which is rotated by a motor 2 to pick up an image of the center part of the bottle 1 by a linear camera 4. A half-mirror 5 is provided on the image pickup axis 100 of the linear camera 4 and the illumination light from a diffu sion light source 6 is reflected by the half-mirror 5 to irradiate the body part of the bottle 1 through the scanning mirror 3. The normal part of the body part of the bottle 1 reflects the illumination light from the diffusion light source 6 regularly, so the level of the linearly reflected light image obtained by the linear camera 4 is detected as a bright level. Further, the defect part of the stripe or wrinkle formed on the surface of the body part of the bottle 1 scatters the illumination light from the diffusion light source 6, so the level of the linear ly reflected light image obtained by the linear camera 4 becomes dark. This dark level is detected to detect the defect.

Description

TECHNICAL FIELD The present invention relates to a bottle defect inspection device, and more particularly to a bottle defect inspection device for inspecting defects occurring in bottles containing drinks or the like.

BACKGROUND TECHNOLOGY Conventionally, when inspecting the body of a bottle containing a drink, etc., a camera and a light source are placed facing each other, and when the bottle passes between them, a transmitted light image from the body of the bottle is used to detect defects. A method is used to detect

Although the above method is effective against opaque foreign matter, defects such as streaks and wrinkles on the surface of the bottle cannot be detected because they do not cast shadows.

In this conventional bottle body inspection method, defects are detected using a transmitted light image from the bottle body, so a drawback is that defects such as streaks and wrinkles on the surface of the bottle body cannot be detected. was there.

Purpose of the Invention The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional products, and its purpose is to provide a bottle barrel defect inspection device that can detect defects such as streaks and wrinkles on the surface of the bottle barrel. do.

Structure of the Invention The bottle defect inspection apparatus of the present invention includes an irradiation means for irradiating a uniform tip onto the body of a bottle rotating about a vertical axis passing through the center of the cross section, and an irradiation means for irradiating the body of the bottle with the uniform light. an imaging means for continuously and linearly receiving reflected light images from a
Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. In the figure, a bottle 1 is conveyed in the direction of arrow B while rotating in the direction of arrow A about a vertical axis 1a passing through the center of the enlargement and the center of the bottom surface. By following the bottle 1 being conveyed by the linear camera 4, the center of the bottle 1 is always imaged by the linear camera 4.

A half mirror 5 is provided on the imaging axis 100 of the linear camera 4, and the illumination light from the diffused light source 6 is also reflected by the half mirror 5 and irradiated onto the body of the bottle 1 via the scanning mirror 3. .

In the normal part of the body of the bottle 1, the illumination light from the diffused light source 6 is mirrored by 4=f and is imaged by the linear camera 4, so the level of the linear reflected light images continuously obtained by the linear camera 4 is is detected as a bright level.

In addition, since the illumination light from the diffused light source 6 is scattered at defects such as streaks and wrinkles that occur on the surface of the body of the bottle 1, the level of the linear reflected light image obtained by the linear camera 4 is at the dark level. Defects are detected by detecting this dark level.

By causing the scanning mirror 3 to follow the bottle 1 during one rotation, it becomes possible to inspect the entire body of the bottle 1.

Note that since the shoulder portion of the body of the bottle 1 is a curved surface and the illumination light is always scattered, it is excluded from the inspection range, and only the straight portion of the body is subject to inspection.

FIG. 2 is a block diagram of another embodiment of the present invention.

In the figure, in another embodiment of the present invention, the half mirror 5 shown in FIG. A diffuser plate 7 is provided near the conveyance path of the bottle 1, and the illumination light from the diffused light source 6 is diffused by the diffuser plate 7 so that the body of the bottle 1 is uniformly irradiated with the illumination light.

In other embodiments of the present invention, the bottle 1 is similar to the embodiment of the present invention.
Since the level of the reflected light image from defective parts such as streaks and wrinkles occurring on the body of the body is detected as a dark level by the linear camera 4, defects are detected using this.

In this way, while the bottle 1, which is being transported while rotating, makes one revolution, the scanning mirror 3 is rotated by the motor 2 to follow the rotation, and the linear camera constantly captures the reflected light image in a straight line from the center of the bottle 1. 4, defects such as streaks and wrinkles on the surface of the body of the bottle 1, which could not be detected conventionally, can be detected.

In one embodiment of the present invention, the bottle 1 is transported while being rotated, but the bottle 1 may be stopped during inspection and rotated, but the invention is not limited to this.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, as described in detail, uniform light is irradiated onto the body of a rotating bottle, and images of reflected light from the body of the bottle are received continuously and in a straight line. This has the effect of being able to detect defects such as streaks and wrinkles on the surface of the body of the bottle.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of another embodiment of the present invention. Explanation of symbols of main parts 1... Bottle 3... Scanning mirror 4... Linear camera 5... Half mirror 6... Diffused light source 7...Diffusion plate

Claims (1)

[Claims] (1) An irradiation means for irradiating uniform light onto the body of a bottle that rotates around a vertical axis passing through the center of the cross section, and a light image reflected from the body of the bottle by the uniform light continuously and in a straight line. What is claimed is: 1. A bottle/barrel defect inspection apparatus, comprising: an imaging means for receiving an image in the form of an image;