JP2586290B2 - Package inspection method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package inspecting method and an 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 the bobbin is wrapped with bunch, the bobbin is wrapped to make a package.

In recent years, resin tubes have been used as bobbins for packages instead of cardboard paper tubes, and lighter colors such as yellow and pink have been used.

The package has been subjected to various inspections to determine whether the package has been wound correctly.

Conventionally, when inspecting a bunch winding, white light is applied to the bunch-wound yarn, an image is taken with 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 with a brighter color, so that even if the image is taken by a camera, the contrast between the bunch-wound thread and the bobbin is hardly obtained, and the bobbin made of resin is also used. There are many warts and protrusions for non-slip, and it is difficult to perform an accurate inspection because it is easy to mistakenly detect these protrusions as bunch-wound threads even though bunch winding is not applied There is.

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

[0008]

In order to achieve the above object, the present invention relates to a package inspection method for detecting a bunch winding wound on a bobbin, wherein a wavelength of a band in which a difference in light intensity between the yarn and the bobbin occurs. The reflected light from the bunch winding and the bobbin is radiated through a filter to capture light of a wavelength in the band where the light intensity difference occurs, and the light intensity is detected. This is a package inspection method in which a signal is determined to be defective when the width of a signal of a yarn layer is equal to or less than a predetermined width. Further, in a package inspection device that inspects a bunch winding wound on a bobbin, a difference occurs in light intensity between the yarn and the bobbin. Irradiating means for irradiating light containing the wavelength of the band, imaging means for imaging the irradiated bunch winding and bobbin, provided in the imaging means, in the reflected light from the bunch winding and bobbin,
A filter that passes light of a wavelength in a band where a difference in light intensity between the bunch winding and the bobbin passes through the imaging unit, and a failure when the width of the signal of the bunch winding yarn layer is smaller than a predetermined width based on a detection signal of the imaging unit. Determining means for determining that

[0009]

According to the above construction, the irradiation means irradiates light including a wavelength in a band where a difference in light intensity between the yarn and the bobbin occurs, and reflects reflected light from the bunch winding and the bobbin through the filter. By capturing light having a wavelength in a band where a difference occurs between the bunch winding yarn layer and the bobbin by detecting the light intensity with the imaging means, the detection signal is obtained.
By determining the width of the signal and determining that the bunch winding is defective when the width is equal to or smaller than the predetermined width, the bunch winding failure can be accurately inspected.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

In FIG. 1, a package P includes a bobbin B
Is provided with a bobbin B inserted in a tray (not shown). The package P is transported, for example, in a package inspection box via a package transport path, where the inspection of the bunch winding of the present invention and other various inspections on the package are performed.

An irradiating means 11 for irradiating the bunch winding 10 of the bobbin B is arranged, and a CCD camera 12 as an imaging means for inspecting the yarn of the bunch winding 10 is arranged and specified to the CCD camera 12. A filter 30 for capturing a range of wavelengths is mounted.

In this embodiment, a lamp for irradiating light (black light) L having a wavelength of about 260 to 420 nm including ultraviolet light is used as the irradiating means 11. In addition, during the irradiation and the imaging by the CCD camera 12, the entire package P is placed in an inspection box, that is, a dark box.

In the above, when light having a wavelength of about 260 to 420 nm is irradiated on the yarn layer of the bunch winding 10 by the irradiation means 11, the yarn layer becomes fluorescent and emits light (emits strong light), while the bobbin B Does not fluoresce, so CCD
When the image is taken by the camera 12, the contrast between the ground color of the bobbin B and the bunch winding yarn becomes clear, a signal having a high S / N ratio is obtained, and the quality of the bunch winding is easily determined without being influenced by the colors of the protrusions and the resin. it can.

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

In the figure, the horizontal axis represents the wavelength and the vertical axis represents 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, 21 indicates white light,
25 indicates a black light, and 26 indicates the spectral characteristics of the bobbin.

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

On the other hand, the white light 25 has a wavelength of about 600 to 800 nm.
A high value is shown in the wavelength region of, and a low value is shown in the wavelength region of 600 nm or less. Therefore, when the yarns 22, 23, and 24 are irradiated with the white light 25, no fluorescence is emitted.
Upon irradiation of 1, the threads 22, 23, 24 emit fluorescence.

It is preferable to irradiate light having a wavelength of about 400 nm according to the material of the bobbin B. When irradiating the bobbin B with the bunch winding 10 with black light, the wavelength range of the black light is about 260 to 420nm
Therefore, as shown in FIG. 1, a filter 30 is attached to the lens of the CCD camera 12 to make the analysis area 380-55.
It is preferable to stop down to a range of 0 nm and observe the light intensity in that range. In this case, the actually detected wavelength is about 400 nm. In FIG. 4, the light intensity at the wavelength of 400 nm indicates that all of the yarns 22, 23, and 24 emit fluorescent light, which is a sufficiently higher value than 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. And so on.

First, as shown in FIG.
Has a yarn layer Y of a bunch winding 10, which is imaged by a CCD camera 12. The signal of 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 whose change is amplified as shown in FIG. From this signal, the quality of the yarn layer Y can be determined.

That is, as shown in FIG. 2, the signal of the signal conditioner circuit 13 is converted by an A / D conversion circuit 14 into a signal.
It is converted into a digital signal and stored in the memory 15. C
The PU 16 determines from the data stored in the memory 15 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)
The defective output 18 is output via the terminal 7.

In the above embodiment, the irradiating means 11 is described as a black light. However, the irradiating means 11 is not limited to the black light, but may be a light having a wavelength in a 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 irradiates light that includes the wavelength of the band in which the difference occurs,
The wavelength of the band where the difference is generated by the filter 30 may be taken.

[0024]

In summary, according to the present invention, when light of a wavelength such as black light is irradiated, the bunch-wound yarn emits strong light, which can be distinguished from the bobbin, so that an accurate inspection can be performed.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a circuit for determining the quality of a bunch winding from a signal of the CCD camera of FIG. 1;

FIG. 3 is a diagram showing an imaging 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]

 DESCRIPTION OF SYMBOLS 10 Bunch winding 11 Irradiation means 12 CCD camera 19 Judgment means 30 Filter B Bobbin P Package

Claims (2)

(57) [Claims] In a package inspection method for detecting a bunch winding wound on a bobbin, light including a wavelength in a band where a difference in light intensity between the yarn and the bobbin is emitted, and reflected light from the bunch winding and the bobbin is emitted. The light of the wavelength in the band where the light intensity is different is taken in through the filter, and the light intensity is detected. Based on the detected signal, when the width of the signal of the yarn layer of the bunch winding is less than a predetermined width, it is determined to be defective. A package inspection method. 2. A package inspecting apparatus for inspecting a bunch winding wound on a bobbin, comprising: an irradiating means for irradiating light including a wavelength in a band where a difference in light intensity between the yarn and the bobbin occurs; Imaging means for imaging the bobbin, provided in the imaging means, in the reflected light from the bunch winding and the bobbin, a filter that passes through the imaging means light having a wavelength in a band where a difference in light intensity between the bunch winding and the bobbin occurs, A package inspection apparatus comprising: a determination unit configured to determine a defect when the width of the signal of the yarn layer of the bunch winding is equal to or smaller than a predetermined width based on the detection signal of the imaging unit.