JPS63135532A - Inspecting method for bunch winding of yarn package - Google Patents

Abstract

PURPOSE:To accurately detect the presence or absence of bunch winding, by running a linear sensor for reading reflected rays of light from a bunch winding part irradiated therewith in a specific direction, rotating a package and comparing the obtained data with the standard model data from a paper tube. CONSTITUTION:A bunch winding position (B) of a yarn package (P) is irradiated with rays of light from a light source 2 and reflected rays of light from the surface of a paper tube 4 are received by a lens 5 and then a light receiving part 7 of a linear sensor and analysis is carried out using an analyzer 8. The sequence of a linear sensor 6 is set so as to be oblique to the direction of the winding direction of bunch winding and the package (P) is rotated by rotation of a tray 10 to read one turn of the paper tube divided into plural portions. The read plural data are compared with the standard model data obtained from a paper tube without bunch winding.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a package bunch winding inspection method.

[Conventional technology]

The wound yarn packages produced by the automatic wine goo are subjected to various checks before being transported to the next process or packaged and shipped.

For example, checking the winding shape of the package yarn waste, checking whether yarns of different types are mixed in, checking the weight, checking whether there is bunch winding, etc. are performed visually by the operator or by automatic inspection equipment. ing.

For example, Japanese Unexamined Patent Publication No. 142359/1983 discloses that a projector/receiver is used as means for inspecting the presence or absence of tail winding.

[Problem that the invention seeks to solve]

A problem with automatically performing the above-mentioned tail winding or bunch winding inspection is that it may be difficult to distinguish between the light reflected by the bunch winding yarn wound around the paper tube and the light reflected by the surface of the paper tube.
Bunch winding detection errors may occur.

For example, in the case of a white paper tube with thin hair on the surface of the paper tube, or in cases where a pattern, company name, etc. is drawn on the surface of the paper tube, it is difficult to distinguish between the thread and the surface of the paper tube.

The present invention aims to solve the above problem.

[Means to solve the problem]

The present invention reads the reflected light of the light irradiated to the bunch winding part with a linear sensor, and the running direction of the linear sensor is set to be diagonal to the winding direction of the bunch winding,
Kappa.

The cage is rotated and one revolution of the paper tube is divided into multiple parts and read.
The presence or absence of bunch winding is detected by comparing the plurality of data read above with reference model data obtained from a paper tube without bunch winding.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 8 shows an example of a bunch winding inspection device. That is, the device (1) includes a light projecting section (3) having a light source (2) that irradiates light to the bunch winding position (B) of the wound yarn package (P) to be inspected, and a paper tube (4). A lens (5) that receives light reflected on the surface, a light receiving section (7) consisting of a linear sensor such as a CCD (6), and an analyzer (8) that processes and analyzes the received optical information, that is, a photoelectric conversion signal. configured.

The above package (P) has a peg for inserting the package (
9) and is conveyed on a conveyor (11), and at the inspection station, it stops at a predetermined position and the tray (10) is kept in a fixed position by rotating means such as a rotating roller (12). The package (P) rotates integrally with the tray.

The light (13) irradiated from the light source (2) is a parallel ray, and the irradiation range is a bunch winding (B) as shown in Fig. 9.
On the other hand, in the light-receiving part (7), the imaging device (6) such as a CCD is arranged diagonally ( 14). That is, by scanning the image sensor (6) in an oblique direction, the area over which the thread is observed is increased.

In the apparatus as described above, an inspection method will be explained next.

For example, if a 2048-bit CCD is used as the image sensor and the rotation speed of the package is l sec/rotation,
Divide the reading cycle into 1 sec/32 = 31.25 m s
Let it be ec.

That is, by reading one circumference of the paper tube by dividing it into a plurality of parts (32 parts in this embodiment), the influence of patterns, company names, dust, etc. can be eliminated.

Furthermore, in order to clearly create a contrast between the thread and the shadow,
Appropriately, the light irradiation angle (θ) from the light source (2) is about 30°. Of course, the optimum irradiation angle is set depending on the Taber angle of the paper tube, etc.

In FIG. 1, the light receiving section (7) obtained by the above device is shown.
) is photoelectrically converted by the COD (6) and becomes an analog signal (LL') shown in FIG. (Q
) is a signal generated by a reflective element other than the yarn on the surface of the paper tube, such as a concave groove at the bunch winding position formed on the surface of the paper tube, and the most prominent signal (LIP) is due to the bunch winding yarn. .

Above, the photoelectrically converted raw analog signal (Ll) passes through a low-pass filter (LPF (14)) and the signal (L2
), and the signal (L2) and the signal (Ll) immediately after the CCD (6) are input to the subtraction circuit (15), and a signal (L3) based on the level difference is output. Furthermore, the above signal (L3
) passes through the rectifier circuit (16) and becomes a valid bit only signal (L
4) is output, and the analog-to-digital conversion circuit (17)
The signal is then converted into a digital signal. Note that the waveform (L5) is a signal based only on the effective range (A).

Next, area calculation (18) is performed based on the obtained data, and the protruding portion (L5) of the data signal (L5) in FIG.
The area of 5P) is calculated digitally, and in the above example, it is 32
The areas for all the divided lines are calculated and summed.

Based on this calculation, the presence or absence of bunch winding yarn is determined by a method described later. Next, the data is divided into 32 parts (19
), and after storing the waveform for one cycle (20), it is checked whether the yarn is continuous or not by calculating the sum of products of the digital signals of each reading line and the previous and following reading lines (21). By comparing the data (22) and the model value (23), the presence or absence of bunch winding yarn is determined (24), and a normal or defective signal is output (25).

The above model value (23) is obtained by preparing a paper tube without bunch winding and a paper tube with bunch winding in advance, and irradiating the paper tube with light at the position where bunch winding is to be applied, as shown in Fig. 8. The device actually inputs optical information to the analyzer (8), and a model value (23) is calculated through the steps shown in the first diagram.

For example, to explain with specific numerical values, five paper tubes without bunch winding are checked using the above device, and the data obtained from the first sample appears as a waveform (L6) as shown in Figure 3, and the highest level is one round. If the average is 44 and the value of sample size 2 is 43, or 41.43.46, then the average will be 43, the reference level (Aave) will be the value of 43, and the area of the part exceeding the above reference level will be is performed for each of the 32 divided lines, and the total area value for one round is calculated. For example, for the paper tube of sample Arashi 1, the total value is 508, and for sample magnetic 2, it is 59.
7. It is assumed that the following values of 470,247.386 are calculated. Therefore, the average value (NAVE) of this total value is 44
1, and the value (NAVE) is temporarily stored.

Once the NAVE value is stored, the sample package with bunch winding is checked in the same way, and the light information irradiated on the bunch winding portion is processed in the same manner as above according to the block diagram shown in FIG. For example, it is assumed that the data signal obtained in the case of having bunch winding is the diagram (L7) in FIG. 4. In this case, the same calculation process as that for calculating the above value (NAVE) is performed, and the average value (UAVE)
Assume that -12554 is calculated.

Then the difference (milk 1()) with the above value (NAVE) is calculated and multiplied by a constant, for example SLH=(UAVE
-NAVE)/6=2018 is calculated. The above constant is set depending on conditions such as the condition of the surface of the paper tube, the thickness of the thread, and the color, and is set to a value so small that it is difficult to distinguish it from the surface of the paper tube.

The above SLH = 2018 is temporarily stored as a model value (23), and the inspection data value obtained in the same manner as above in the actual pancake is compared as shown in Fig. 1 to check the presence or absence of threads. As a check, it is checked whether there is a thread at the bunch winding position. For example, a bar cage with an inspection data value of 12782 is compared with the above model value and is determined to be sufficiently large and has threads. Next, the second step of assimilation is whether the thread is continuous or not.
Let's move on to checking.

In other words, the continuity of the thread is checked when there is a thread in each line divided into 32 in Fig. 5.
This is done by finding the converted value 1 and checking 8 times to see if there is a 1 in the previous line.

That is, r(K,L) = f(K-1,L-1) +
Calculate f(K-1,L) +f(K-1,L+1),
If f(K,L)≧1, then f(K,L)=1, and if f(K,L)<1, then f(K,L)−〇. In this way, as shown in FIG. 6, one line l! i)
If there is a "1" in the line, the value of the line is set to "1",
If there is no "1" in the I line, it is treated as "0", the values for all lines (line divided into 32) are added, and if the total value exceeds the set value, the thread is continuous, That is, by ANDing the first check and the second check, it is determined that the yarn is continuous over the entire circumference of the paper tube, that is, it is determined that bunch winding exists.

FIG. 7 shows the processing of the analyzer in the process of determining whether the package is a normal package with bunch winding or an abnormal package based on the first check, that is, checking whether there is yarn at the bunch winding position, and the second check. The paper (24) on which the steps are printed is shown. That is, (a) is the checking process for a paper tube sample without bunch winding, (b) is the checking process for a paper tube sample with the end of bunch winding, and (C) is the standard model value setting from the data of both the above samples. The process of
(d) shows the actual package inspection process. Example 4
゜For the package (Pl), the calculated area value is 1.
2782, which is greater than the model value (2018), it is determined that there is a yarn at the bunch winding position, the first check is passed, and the continuity of the yarn is then performed as a second check, Since this second check also failed, rTHI
It is displayed that it is a normal package such as s PACKAGEIs GOOD J.

In addition, the area calculation value for pan cage (Pi) is 73
9, which is smaller than the model value (201B), so it is determined that there is no thread, the second check is omitted, and a defective package is displayed.

〔Effect of the invention〕

As described above, according to the present invention, the bunch winding inspection of a pan cage is automatically performed, and the presence or absence of bunch winding can be detected even in a package where it is difficult to distinguish between the surface of the paper tube and the yarn.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the method of the present invention, Fig. 2 is an explanatory diagram showing waveforms in the signal processing step, Fig. 3 is a graph showing a state without bunch winding, and Fig. 4 is a graph showing a state with bunch winding. ,
Figure 5 is an explanatory diagram of the principle of how to check thread continuity.
FIG. 6 is a schematic diagram showing the same checking method, FIG. 7 is a diagram showing an actual example printed out after being checked by a bunch winding inspection device, and FIG. 8 is a diagram showing a bunch winding used to carry out the method of the present invention. FIG. 9 is a schematic configuration diagram showing an example of an inspection device, and is an explanatory diagram showing scanning lines by COD. (1) ... Bunch winding inspection device (6) ... CCD (8) ... Analyzer (23) - ... Model value (Ll) ~ (Ll) ... Data signal (P) (PI )'(Pi)...Windling package (Y
) - Bunch winding thread Fig. 2 Fig. 3 Fig. 4 FFPo -. Procedural Amendment (Voluntary) July 1986/1.19 Ushi no Ko 1988 V4 Convention No. 274386 2, Name of the invention Makito Maki Kensa Neu Neuu winding yarn package bunch winding inspection method 3, Person making the amendment Relationship to the incident Patent applicant Kifuutoshi Southern Kifushi 3 Win Minami Ochiaicho Bunch Address 8601 3, Minami Ochiai-cho, Kisshoin, Minami-ku, Kyoto City Murata Kiriki Contact information for Kapusuki Kaisha ◎612 136 Taketa Mukodai-cho, Fushimi-ku, Kyoto City Murata Ki Song of Detailed Explanation of the Invention in the Specification, Section 6, Contents of Amendment 6-1 Detailed Explanation of the Invention in the Specification Section, Page 9, Line 15 ``... or assimilation'' ” is corrected to “whether or not.” 6-2 Page 10, lines 2 and 3 rf (K, L) −f (K-1, L-1) +f(
K-1,L) +f(X-1,L+I)'' to rf(K,
L) = (f(K-1, L-1) +f(K-1,
L)+f(K-1,L+1)) x f(K
,L) Correct as J. 6-3 Correct figures 3, 4, 5, and 6 of the drawings as shown in the attached drawings. That's all for Satoru J4

Claims (1)

[Claims] A linear sensor reads the reflected light irradiated onto the bunch winding portion of the thread package, and the scanning direction of the linear sensor is diagonal to the thread winding direction of the bunch winding, and the package A method for inspecting bunch winding of a wound yarn package, characterized in that the presence or absence of bunch winding is detected by rotating the yarn package, analyzing and processing a plurality of optical information read at a plurality of positions, and comparing it with model data.