JPH06265312A - Package inspection device - Google Patents

Abstract

PURPOSE:To automatically judge whether the spooling position of a package is conforming or not by shooting the slit light applied to the end face of the package with a CCD camera and then calculating the ratio which the image of the slit light occupies within a window. CONSTITUTION:When a slit light 2 along the direction of radius of an end face 1 of a package P is applied from a slit light source 3 skewly in the direction of right angle. slit light along the shape of the end face appears on the end face 1. When the position of the end face 1, namely a spoolitng position, is shifted in upper or lower direction. the lighting position of the light 2 also deviates forward and backward from a normal position. When the light 2 is shot from the opposite side of the light source 3 with a CCD camera 4, the inside of a window 24 provided at an evaluation range 22 of the image signal while the position is shifted from a normal slit light image position 23 becomes dark in the case of the normal spooling position and bright in the other cases. Therefore, an operation processing part judges that the package is conforming when the ratio where the bright part within the window 24 occupies is equal to or less than a specific value and that the package is not conforming in other cases.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package inspection device for inspecting the package winding position.

[0002]

2. Description of the Related Art Generally, in a wound package produced by an automatic winder or the like, there is a defective package in which a position of a yarn layer end surface, which is a winding position, is displaced above or below a normal position. Therefore, it is necessary to perform a visual inspection of the package.

At present, the visual inspection of this package is artificially performed at the time of packaging, etc., and it is troublesome and inefficient, so it is desired to develop an inspection device capable of automatically and efficiently performing this. It is rare.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a package inspection device capable of automatically and efficiently determining the quality of the package winding position. I am trying.

[0005]

In order to achieve the above object, a package inspection apparatus of the present invention comprises a slit light source for irradiating an end face of a package with slit light along a radial direction obliquely in a direction perpendicular to the slit light source, and a slit light source on the end face. A CCD camera for photographing the slit light from the side opposite to the slit light source;
The quality of the package winding position is determined based on the window provided at a position displaced from the normal slit light image position in the evaluation range of the image signal output from the CD camera, and the proportion of the bright portion in the window. It is characterized by including an arithmetic processing unit.

[0006]

According to the package inspection apparatus of the present invention having the above-described structure, the end face of the package is irradiated with the slit light along the radial direction from the slit light source oblique to the right angle direction. The slit light along is projected. In this case, if the bobbin winding position of the package, that is, the position of the end face is displaced upward or downward from the regular position, the irradiation position of the slit light is also displaced forward and backward from the regular position. When this slit light is photographed by the CCD camera from the side opposite to the slit light source, the inside of the window provided at a position displaced from the regular slit light image position in the evaluation range of the image signal is dark when the regular spool position is obtained. , Otherwise, it is brightened by the image of the slit light which is displaced. Therefore, the quality of the winding position of the package is determined by the arithmetic processing unit based on the ratio of the bright portion in the window, and thus the quality of the winding position of the package can be automatically and efficiently determined. .

[0007]

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In FIGS. 1 and 2 showing the basic structure of the package inspecting apparatus, reference numeral P is a package produced by an automatic winder or the like, which is formed by winding a yarn around a core tube B. In order to determine whether the bobbin winding position of the package P is good or bad, the package inspection device uses the slit light source 3 that irradiates the end face 1 of the package P with the slit light 2 along the radial direction obliquely from the right angle direction, and the end face 1 thereof. A CCD camera (CCD area camera) 4 for photographing the upper slit light 2 from the side opposite to the slit light source 3 and this CC
Based on a window 24 (see FIG. 6) provided at a position displaced from the regular slit light image position 23 in the evaluation range 22 of the image signal output from the D camera 4, and the ratio of the bright portion in the window 24. In addition, the arithmetic processing unit 5 (see FIG. 5) for determining the quality of the bobbin winding position of the package P is provided.

The package inspecting apparatus will be described in more detail. As shown in FIGS. 3 and 4, the package inspecting apparatus is installed on the way of a carrying path (conveyor) 7 for carrying the package P on the tray 6. An embedded inspection box 8 is installed. The inspection box 8 forms a dark room, and an opening / closing gate (not shown) is provided at the entrance / exit of the package through which the transport path 7 penetrates. The package P is mounted on a peg 9 protruding from the upper portion of the tray 6 and transported on the conveyor 7 together with the tray 6, and is temporarily stopped by a tray stopper (not shown) at the inspection position S in the inspection box 8. There is.

Then, on one side of the package P at the inspection position S, an upper slit light source 3a for irradiating the upper end surface 1a of the package P with slit light 2 along the radial direction from diagonally above in a direction perpendicular to the upper slit light source 3a is provided. A lower slit light source 3b for irradiating the slit light 2 along the radial direction from a diagonally lower side in the right direction is arranged on the end face 1b, and corresponding CCD cameras 4a, 4b are arranged on the opposite side. In order to support the slit light sources 3a and 3b and the CCD cameras 4a and 4b, a frame 10 provided in the inspection box 8 is provided with an elevating rod 12 through a support 11 so that the height of the rod 12 can be adjusted. Rod 12
The slit light sources 3a and 3b and the CCD cameras 4a and 4b are attached to the above via the attachment arm 13. Further, in order to inspect the entire circumference of the end surface of the package, a rotation mechanism 21 that supports the tray and intermittently rotates it by a predetermined angle is provided at the inspection position.

In order to process the image signal output from the CCD camera 4 and determine the quality of the bobbin winding position of the package P, the binarized image signal output from the CCD camera 4 as shown in FIG. Is the interface unit 14, AD
The determination result of the quality of the bobbin winding position of the package P, which is input to the arithmetic processing unit 5 via the conversion unit 15 and the memory unit 16 and is arithmetically processed by the arithmetic processing unit 5, is transmitted via the interface 17 to the CRT display unit 18 The output will be displayed. In this case, the arithmetic processing unit 5
Is set with an evaluation range 22 of the image signal output from the CCD camera 4, and in the evaluation range 22, as shown in FIG. Windows 24a and 24b are formed. When the bobbin winding position of the package P is deviated from the regular position, for example, when it is deviated upward, it is in the upper window 24a, and when it is deviated downward, it is in the lower window 24b. If the image 25 of the slit light comes to be positioned in one of the windows, and the degree of positional deviation causes a small amount of positional deviation, for example, the ratio of the bright portion is small, and if the amount of positional deviation is large, The proportion occupied by Akebe increases. Therefore, based on the ratio of the bright portion in the window 24, the arithmetic processing unit 5 is a good package when the ratio is less than or equal to a predetermined value, and is a defective package when the ratio exceeds the predetermined value. Is judged to be good or bad and output to the CRT display unit 18 for display.

When the bobbin winding position of the package P is a normal position, as shown in FIG.
If there is a defective portion 19 having unevenness on the end face of the device, the slit light along the shape of the end face can be captured by the CCD camera as a clear image, and a discontinuous portion 20 is generated in the image signal according to the defective portion. Therefore, the quality of the end surface shape of the package P may be determined by the arithmetic processing unit depending on the presence or absence of the discontinuous portion 20.

According to the package inspection apparatus having the above structure, the package P is first placed on the tray 6 and conveyed by the conveyor 7 to the inspection position S in the inspection box 8. At this inspection position S, the upper and lower end faces 1a of the package,
1b is irradiated with slit light 2 along the radial direction from slit light sources 3a, 3b, and the slit light 2 irradiated on the end faces 1a, 1b of the CCD cameras 4a, 4b on the opposite side.
Taken by. Further, the package is rotated intermittently by the rotating mechanism, so that the entire circumference of the end surface of the package is photographed.

When the bobbin winding position of the package P deviates above or below the normal position, the irradiation position of the slit light 2 on the end face 1 of the package P also deviates from the normal position to the front or the rear, Corresponding to CCD
Since the image position of the slit light in the evaluation range 22 of the image signal output from the camera 4 also deviates from the regular image position 23, it is provided in the evaluation range 22 vertically displaced from the regular slit light image position 23. Brightness or darkness due to the image 25 of the slit light occurs in either of the windows 24a and 24b. And these windows 24a, 24b
The ratio of the bright portion of the package is calculated by the calculation processing unit 5, and it is determined whether the package is good or bad such that the package is a good package when the ratio is less than or equal to a predetermined value and the defective package when the ratio exceeds the predetermined value. The judgment result is CR
The output is displayed on the T display unit 18.

[0015]

In summary, according to the package inspection apparatus of the present invention, the slit light along the radial direction is applied to the end surface of the package from the slit light source oblique to the right angle direction, and the slit light is emitted from the opposite side of the slit light source to the CCD. The quality of the winding position of the package is determined based on the ratio of the bright part in the image of the slit light of the window that is taken by the camera and shifted from the normal slit light image position in the evaluation range of the image signal. Therefore, the quality of the bobbin winding position of the package can be automatically and efficiently determined with high accuracy.

[Brief description of drawings]

FIG. 1 is a plan view showing a basic configuration of a package inspection apparatus that is an embodiment of the present invention.

FIG. 2 is a side view of the package inspection device of FIG.

FIG. 3 is a side view of a package inspection device installed in an inspection box.

FIG. 4 is a front view of the package inspection device of FIG.

FIG. 5 is a diagram showing a configuration of an image processing unit of the package inspection device.

FIG. 6 is a diagram showing a window.

FIG. 7 is a diagram showing an end face shape of a package and a detected image thereof.

[Explanation of symbols]

 P package 1 End surface 2 Slit light 3 Slit light source 4 CCD camera 5 Arithmetic processing unit 22 Evaluation range 23 Regular slit light image position 24 Wind

Claims (1)

[Claims] 1. A slit light source for irradiating an end face of a package with slit light along a radial direction from a direction oblique to the right angle, a CCD camera for photographing slit light on the end face from the side opposite to the slit light source, and the CCD camera. From the regular slit light image position within the evaluation range of the image signal output from the window, and a calculation process for determining whether the winding position of the package is good or bad based on the ratio of the bright portion in the window. And a package inspection device.