JPH0682375A - Method and apparatus for inspecting package - Google Patents

Abstract

PURPOSE:To clearly discriminate between a bunch roll and a bobbin by irradiating the bobbin with light of a wavelength region where the luminous intensity of yarn shows a high value and detecting the luminous intensities of both of the bunch roll and the bobbin. CONSTITUTION:For example, a lamp emitting light (black light) L with a wavelength of about 260-420nm containing ultraviolet rays is used as an irradiation means 11 and, when the whole of a package P is received in an inspection box (camera) to be irradiated with the light L, the yarn layer of a bunch roll 10 emits intensive fluorescent light. Since a bobbin B emits no fluorescent light, when the images of the bunch roll and the bobbin B are taken by a CCD camera 12, the contrast of the ground color of the bobbin B with the color of the yarn of the bunch roll 10 becomes clear and the bobbin B and the bunch roll 10 can be discriminated and, therefore, accurate inspection can be performed. Further, a signal of high SIN ratio is obtained and the effect of a projection or the color of a resin is eliminated and the quality of the bunch roll can be easily judged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package inspection method and apparatus for inspecting a bunch wound on a bobbin of a package.

[0002]

2. Description of the Related Art A package wound by a winder is
After bouncing the bobbin, the bobbin is wound and packaged.

In recent years, as a bobbin of a package, a resin tube has been used instead of a paper tube made of cardboard, and its color is bright such as yellow and pink.

This package has undergone various inspections to see if the package is properly wound.

Conventionally, when the bunch winding is inspected, white light is applied to the bunch wound yarn, an image of the white light is picked up by a CCD camera or the like, and the bunch winding is inspected by image processing.

[0006]

However, as described above, the bobbin has been replaced by a bright color, and even if the image is picked up by a camera, it is difficult for the bunch-wound thread and the bobbin to have a contrast, and the resin bobbin is made of a resin. There are a lot of warts and protrusions for non-slip, and it is easy to mistakenly detect these protrusions as a bunch-wound thread and do not perform an accurate inspection, even though they are not bunch-wrapped. There is.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a package inspection method and an apparatus therefor capable of clearly distinguishing a bobbin from a bunch winding when inspecting a bunch winding.

[0008]

In order to achieve the above object, the present invention provides a package inspection method for inspecting a bunch winding wound on a bobbin, wherein the light in the wavelength region where the light intensity of the yarn exhibits a high value is used. It is an inspection method in which the bunch winding and the bobbin are detected to detect the light intensity, and thereby the bunch winding and the bobbin are distinguished from each other to inspect the bunch winding. Further, the bunch winding wound on the bobbin of the package is inspected. In the package inspection device, an irradiation unit that irradiates the bobbin with light in a wavelength region where the light intensity of the yarn shows a high value, an imaging unit that images the irradiated bunch winding, and whether the bunch winding is good or bad based on the detection result of the imaging unit. And a determining means for determining.

[0009]

According to the above construction, when the light emitted from the irradiating means is irradiated with light in the wavelength range where the light intensity is high, the bunch winding part emits strong light and can be distinguished from the bobbin, so that an accurate inspection can be performed. Can be done.

[0010]

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

In FIG. 1, the package P is a bobbin B.
A bunch winding 10 is applied to the tray, and although not shown, the bobbin B is inserted into the tray and is erected. The package P is conveyed into a package inspection box, for example, through a package conveyance path, and various inspections regarding the bunch winding of the present invention and other packages are performed.

Now, an irradiation means 11 for irradiating the bunch winding 10 of the bobbin B is arranged, and a CCD camera 12 as an image pickup means for inspecting the yarn of the bunch winding 10 is arranged and specified to the CCD camera 12. A filter 30 is attached that captures a range of wavelengths.

As the irradiating means 11, a lamp for irradiating light (black light) L having a wavelength of about 260 to 420 nm containing ultraviolet rays is used in this embodiment. Further, at the time of this irradiation and the image pickup by the CCD camera 12, the whole package P is put in the inspection box, that is, in the dark box.

In the above, when the yarn layer of the bunch winding 10 is irradiated with the light of the wavelength of about 260 to 420 nm by the irradiation means 11, the yarn layer emits fluorescence (emits strong light), while the bobbin B is emitted. Does not fluoresce, so CCD
When the image is taken with the camera 12, the contrast between the ground color of the bobbin B and the bunch winding yarn becomes clear, a signal with a high S / N ratio is obtained, and there is no influence of the color of the protrusions or the resin, and it is easy to determine whether the bunch winding is good or bad. it can.

FIG. 4 shows the spectral characteristics of the yarn obtained by the spectroscopic analysis method.

In the figure, the horizontal axis indicates the wavelength and the vertical axis indicates the light intensity. 22 is a cotton yarn, 23 is a mixed yarn of tetron and cotton, 2
4 indicates the spectral characteristics of rayon yarn, and 21 indicates white light.
Reference numeral 25 indicates a black light, and 26 indicates a bobbin spectral characteristic.

As shown in FIG. 4, the spectral characteristics of the yarn differ depending on the type. However, all types are about 300-550n
The light intensity is higher than that of the bobbin 26 in the wavelength range of m.

On the other hand, the white light 25 is about 600 to 800 nm.
Shows a high value in the wavelength region of, and shows a low value in the wavelength region of 600 nm or less. Therefore, when the threads 22, 23, 24 are irradiated with the white light 25, they do not emit fluorescence, but the black light 2
When 1 is irradiated, the yarns 22, 23, 24 emit fluorescence.

It is preferable to irradiate light having a wavelength of about 400 nm depending on the material of the bobbin B. When irradiating the bobbin B portion around which the bunch winding 10 is wound with black light, the wavelength range of the black light is approximately 260 to 260. 420 nm
Therefore, as shown in FIG. 1, the filter 30 is attached to the lens of the CCD camera 12, and the analysis area is set to 380 to 55.
It is preferable to focus on the range of 0 nm and view the light intensity in that range. In this case, the actually detected wavelength is about 400 nm, and in FIG. 4, when the light intensity at the wavelength of 400 nm is observed, all the yarns 22, 23, and 24 fluoresce, which are sufficiently higher than those of the non-fluorescent bobbin 26. Can be accurately inspected.

FIG. 2 shows a judging means 19 for judging the quality of the bunch winding from the signal of the CCD camera 12, and FIG. 3 shows the signal of the CCD camera corresponding to the yarn portion of the bunch winding and its position. Etc. are shown.

First, as shown in FIG. 3A, the bobbin B
Has a yarn layer Y of the bunch winding 10, which is imaged by the CCD camera 12. The signal from the CCD camera 12 is shown in FIG.
As shown in (b), there is no change in the signal from the end of the bobbin B to the bunch winding 10, and the signal changes in the yarn layer Y.
When the signal from the CCD camera 12 is processed by the signal conditioner circuit 13 shown in FIG. 2, the signal is adjusted to a signal in which the variation is amplified as shown in FIG. The quality of the yarn layer Y can be determined from this signal.

That is, as shown in FIG. 2, the signal of the signal conditioner circuit 13 is supplied to the A / D conversion circuit 14,
It is converted into a digital signal and stored in the memory 15. C
Based on the data stored in the memory 15, the PU 16 determines whether the yarn layer of the bunch winding 10 is normal or defective as shown in FIG. 3 (in this case, there is no yarn layer Y, or the winding width of the yarn layer is a predetermined width). Interface 1)
A defective output 18 is output via 7.

In the above embodiment, the black light is used as the irradiation means 11, but the light is not limited to the black light, and the light having a wavelength in the region where the light intensity of the yarn shows a high value (a wavelength of about 300 to 550 nm). Light).
It is preferable to irradiate light that causes a difference in light intensity between the yarn and the bobbin, but irradiate light that includes a wavelength in a band where the difference occurs,
The wavelength of the band in which the difference occurs may be taken in by the filter 30.

[0024]

In summary, according to the present invention, when light of a wavelength such as black light is irradiated, the yarn portion of the bunch winding emits strong light and can be distinguished from the bobbin, so that a proper inspection can be performed.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention.

FIG. 2 is a diagram showing a circuit for determining whether the bunch winding is good or bad from the signal of the CCD camera of FIG.

FIG. 3 is a diagram showing an image pickup portion of a bunch winding portion of a package and signals and processing signals of a CCD camera in the present invention.

FIG. 4 is a diagram showing spectral distribution characteristics of various bunch windings and bobbins, and white light and black light.

[Explanation of symbols]

 10 Bunch Roll 11 Irradiation Means 12 CCD Camera 19 Judgment Means 30 Filter B Bobbin P Package

Claims (2)

[Claims] 1. A package inspection method for inspecting a bunch wound on a bobbin, wherein the bobbin is irradiated with light in a wavelength region where the light intensity of the yarn shows a high value, and the light intensity between the bunch and the bobbin is detected. A package inspection method characterized by performing the inspection of the bunch winding by distinguishing the bunch winding from the bobbin. 2. A package inspection device for inspecting a bunch wound around a bobbin of a package, wherein the bobbin is irradiated with light in a wavelength region where the light intensity of the yarn is high, and the irradiated bunch wound. A package inspection device comprising: an image pickup means for picking up an image; and a judgment means for judging whether a bunch winding is good or bad based on a detection result of the image pickup means.