JPS5817307A - Device for checking concave and convex - Google Patents

Abstract

PURPOSE:To detect the concave and convex parts on the surface of a bottle precisely, by irradiating light on the surface of the bottle, focusing the image of the light which is transmitted through the bottle and the like on a screen, and detecting said light image. CONSTITUTION:The light emitted from a lamp LA is transmitted through the light transmitting bottle BT and reflected by the presence of the concave and convex parts OB on the surface. Then the image is focused on the screen SC. The pattern of the intensity of the light is converted into an electric signal by a sensor SE, and the presence or absence, positions, shapes, and the like of the concave and convex parts are judged by a signal processing part SP.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for inspecting irregularities formed on a light-transmissive object such as a bottle. FIGS. It is a diagram.

That is, in FIG. 1, the uneven portion OB of the bottle BT illuminated by the illumination lamp LA is directly photographed by the television camera CA.

However, according to this method, due to uneven illumination of the bottle BT due to the illumination pump LA, or when the uneven parts are made of the same material, there is a shadow due to the fundus line 1, or uneven reflected light due to the shape of the bottle, etc. In many cases, the image to be inspected is unclear, 1 and therefore detection accuracy may be reduced and necessary information may not be obtained. Also, 1st 2nd WJ is sent.

Inspection is performed using the light receiving sensor 811.8E2, but in this case the light from the light transmitting sensor SE2 is diffused, so the light receiving sensor SE2 must efficiently receive the reflected light from the uneven parts. However, in order to improve the detection accuracy in this case, the sensor must be brought close enough to touch the uneven surface. This has the disadvantage that sensor installation, wiring type, and adjustment work become complicated.

This invention has been made in view of the above, and an object thereof is to provide an inspection device that can easily and accurately detect this type of unevenness without being subject to restrictions on snow distribution. 1According to this invention, transmitted light is applied to the unevenness formed on the surface of a bottle, etc., and an optical image is formed on a screen by the lens action of the 1# unevenness, and the 1st optical image is detected by a sensor. This is accomplished by ◇Hereinafter, we will refer to the actual m*any of this invention in 11@.

The 3rd WJ is between the 1st and 41st configuration outline showing the embodiment of this invention.
1 is a partially enlarged view of FIG. 3-1 5 is an explanatory diagram showing the relationship between the optical image projected on the screen and the senna.

In the third [, LA is a lighting lamp, BT is a bottle, OB
Bottle llI &: The uneven portion formed, 8C is the screen, Sm is Senna, 8F is Confucian, Jinnang, and C is cable. 〇The light emitted from the illumination lamp LA passes through the light-transparent bottle BT. Due to the existence of the unevenness ll01B on the surface of the screen 1, the light is bent and formed into an image on the screen SC as shown in the fourth [f]. The intensity pattern of this light is converted into an electric signal by the sensor f88, and the presence/absence, position, shape, etc. of uneven parts is determined by the signal processing section 8P. As shown in FIG. 5, the image formed by the unevenness appears as a clear pattern PA of light intensity.1 This is the sensor 8 as shown in the figure.
It is converted into an electrical signal by E or BB'.0 As is clear from the figure, the shape or installation position of the sensor can be arbitrarily selected depending on the object to be inspected. According to the invention, the following effects can be expected: 1) Since the image of the uneven portion is formed on the screen, 1)
A clear image can be obtained even if the bottle and the uneven portion are made of the same material.

2) Since the image is formed on the X#9-n, there is no need to bring the sensor directly close to the object to be inspected. Therefore, any number or shape of sensors can be placed at any position on the screen.3) As a result, the position and shape of the uneven object can be inspected with high accuracy.

The present invention can be applied not only to the inspection of irregularities on the bottle surface described above but also to the detection of figures printed on the bottle surface.

[Brief explanation of the drawing]

1m and 2 are schematic configuration diagrams showing a conventional example of an unevenness inspection device, and 3rd WI is a configuration overview showing an embodiment of the present invention [
, Figure 1114 is a partial enlargement of the 3rd cabinet - 1 5th @ is sl')
>It is an explanatory diagram showing the relationship between the image projected above and the senna. Code explanation: BT, song, bottle, OB... Yokkatsubu, CA... song television camera, LA... song lighting lamp, 8B, 51ij
'. SE1# SB2...Sensor, sc...
・Screen, SP...Signal processing section, C...Curved cable, PA-----Optical image due to unevenness

Claims (1)

[Claims] By applying transmitted light from one side to the unevenness formed on the surface of a light-transmitting object such as a bottle, and inspecting the optical image produced on the other side by the lens action of the unevenness, the presence or absence of unevenness, its position, and the state of the melt can be determined. An inspection device for inspecting the crucian carp, comprising: a light source that irradiates the light transmitting body; a screen that projects an optical image generated by the unevenness; A circular/convex inspection device comprising: a detection means for detecting a circular convexity.