JPH0642940A - Method and apparatus for inspection of belt-shaped-member joint part - Google Patents

Abstract

PURPOSE:To obtain the inspection method, of a belt-shaped-member joint part, wherein a pasted state can be discriminated with good accuracy and the pasted state can be supplied as data required for the operating control and the diagnosis of a pasting device or the like and to obtain its apparatus. CONSTITUTION:Slit light is projected on a joint part A1 on a belt-shaped member A, the joint part A1 is read out by a camera 2, the position of a peak corresponding to the bright line S of the slit light which has been output from the camera 2 is detected by a peak-position detection means 11. On the basis of a position signal which has been detected, spatial-distance image data on the joint part A1 is computed by an operation and processing means 21, the spatial-distance image data is input to a recognition and judgment means 34, the joint state of the joint part A1 is inspected and whether the joint state is good or not is judged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for inspecting a belt-shaped member connecting portion, and more specifically, accurately inspecting whether or not the bonding state of the belt-shaped member connecting portion is proper. The present invention relates to a method and an apparatus for inspecting a band-shaped member joint portion that can be used.

[0002]

2. Description of the Related Art In recent years, in accelerating automation of a tire molding process, it is known to automatically inspect a joining (joining) state of end portions of tire constituent materials, which has a great influence on tire quality. It has become indispensable in molding. By the way, conventionally, for example, JP-A-63-281831
Japanese Patent Publication discloses an apparatus for evaluating the joining of belt layers of a tire. This device is equipped with a laser beam device for projecting a laser beam onto a belt layer on a drum and a camera for observing the projected position of the laser beam. The amount of displacement (strain) of the projection is used to evaluate the joining of the belt layers.

[0003]

However, in the above-mentioned apparatus, since the joint portion of the belt layer is evaluated by using the distortion of the projection as it is, the bonding state of the joint portion should be specified in detail. However, since the laser beam is projected eight times, there is a problem that only a rough determination of the bonding state can be performed.

Moreover, only the laser irradiation position is recorded, and the dimensions and the like have not yet been measured, and the condition of the entire joint portion can be measured and supplied as data necessary for other processes. Not in. The present invention has been devised by focusing on such a conventional problem, and it is possible to accurately determine whether or not the bonding state in the joint portion of the belt-shaped members such as the tire constituent material is accurate, and the bonding of the belt-shaped members is performed. An object of the present invention is to provide a method for inspecting a band-shaped member joint portion and an apparatus thereof, which can be supplied as data necessary for performing operation management and diagnosis of the apparatus and the like.

[0005]

According to the method for inspecting a band-shaped member joint portion of the present invention, slit light along the longitudinal direction of the belt-shaped member is projected on the surface of the band-shaped member joint portion in the width direction of the belt-shaped member. The joint portion where the slit light is projected is read by a camera, and the peak position corresponding to the bright line of the slit light of the signal output from the camera is detected by the peak position detecting means. The spatial distance image data of the splicing portion is calculated by the arithmetic processing means based on the position signal, and the spatial distance image data is input to the recognition determining means to identify the pasting state of the splicing portion and pass or fail. The main point is to judge.

The strip-shaped member joint portion inspection apparatus according to the present invention includes a projector for projecting slit light along the longitudinal direction of the belt-shaped member in the width direction of the belt-shaped member on the surface of the joint portion of the belt-shaped member. A camera for reading the joint portion on which the slit light is projected; a peak position detecting means for detecting the position of a peak corresponding to the bright line of the slit light of the signal output from the camera; An arithmetic processing means for calculating the spatial distance image data of the splicing portion, and a recognition determining means for discriminating the adhering state of the splicing portion based on the spatial distance image data and determining whether the result is acceptable. It is a summary.

[0007]

The present invention is constructed as described above, and the slit light is projected onto the joint portion of the belt-like member, which is read by the camera, and predetermined based on the position of the peak of the signal output from the camera. The spatial distance image data of the joint portion of the belt-shaped member is calculated by the arithmetic processing means provided with the program, and the bonding state of the joint portion is discriminated from the spatial distance image data by the discriminating / determining means, and the pass / fail result is determined. Since the determination is made, it is possible to accurately determine whether or not the bonding state of the band-shaped member such as the tire constituent material in the joining portion is acceptable.
Further, it becomes possible to supply as data necessary for performing operation management and diagnosis of the band-shaped member bonding apparatus and the like based on the data in which the bonding state of the joining portion is determined.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic perspective view showing an example of an inspection device for a band-shaped member joint portion according to the present invention. This inspection device includes a projector 1 for projecting slit light onto a joint portion A ₁ of a belt-shaped member A. determines that the camera 2 for reading the KumiTsugi portion a ₁ of the slit light is projected, the acceptance of the bonded state of KumiTsugi unit processes the signals KumiTsugi portion a ₁ read by the camera 2 Control unit 3 and splicing unit A whose pasted state is NG
It is composed of a database 4 that accumulates ₁ data by category. Reference numeral 6 is a rotary drum around which the strip-shaped member A can be wound.

The projector 1 has a joint portion A _{1 of the} belt-shaped member A.
Slits along the longitudinal direction of the belt-shaped member A from the diagonal direction of the width direction of the rotary drum (not necessarily the diagonal direction when the camera 2 is inclined as described later) on the surface of It is a floodlight provided with a laser or the like capable of projecting light in a width direction of a strip-shaped member at a predetermined interval. It is preferable that slit light can be projected in multiple lines at intervals of 1 cm or less, or at least 50 lines. For example, a slit disk having 50 slits at 1 cm intervals is provided with a 5 mm slide mechanism, and slit light is projected from the slit disk through a cold mirror and a collimating lens from a point light source. As a result, it is possible to project 100 slit lights at intervals of 5 mm by sliding 50 multi-filament lines per 1 cm by 5 mm, and to bond the joining portion A ₁ of the belt-shaped member A to each other. You can see it accurately.

The camera 2 has a joint portion A _{1 of the} belt-shaped member A.
The CCD camera is provided so as to face the (rotary drum 6) and can receive the bright lines S of the slit light projected on the joint portion A ₁ of the belt-shaped member A in multiple ways. When the projector 1 for projecting the slit light from the oblique direction KumiTsugi portion A ₁ of the surface of the belt-like member A, the camera 2 may be provided in the direction perpendicular to the surface of the KumiTsugi portion A _1, projector 1 is the belt-shaped member A
When the camera 2 is installed in the direction perpendicular to the surface of the joint portion A ₁ , the camera 2 is installed in a direction inclined in the width direction of the rotary drum 6 with respect to the surface of the joint portion A ₁ .

The control unit 3 is composed of a microprocessor or the like, and as shown in FIG. 2, coordinate calculation for calculating the three-dimensional coordinates of the input unit 10 from the camera 2 and the joint A ₁ of the belt-shaped member A. It is provided with a section 20 and a recognition section 30 that identifies the bonded state of the joining section A ₁ of the strip-shaped member A and determines whether the bonding is successful or not. The input unit 10 includes peak position detection means 11 for detecting the position of a peak corresponding to the bright line S of the slit light of the analog video signal output from the camera 2,
The peak position storing means 12 for storing the position of this peak is provided. As shown in FIG. 3, the peak position detecting means 11 holds each peak of the analog video signal scanned in the width direction (X-axis direction) of the strip-shaped member A as indicated by an arrow at predetermined intervals, and positions the peak. (X ₁ , x ₂ , x ₃ ,
x ₄ ...) Signal (a position signal of a peak corresponding to the bright line S of the slit light) is output. Also, the counter value is latched by the position signal.

The coordinate calculating unit 20 calculates the spatial distance image data (three-dimensional coordinate value) of the joint portion A ₁ of the belt-shaped member A based on the position signal, and the three-dimensional coordinate value. And a coordinate storage means 22 for storing. In the arithmetic processing means 21, data written in a memory (not shown) (projection position coordinates of the projector 1, camera 2)
3) coordinate values of the joint portion A ₁ of the belt-shaped member A are calculated based on the principle of the triangulation method based on the position signal of the peak) and the position signal of the peak.

The recognition section 30 has a recognition determination means 34 and a classification means 35, and the recognition determination means 34 has a preprocessing means 3.
1, a feature extracting means 32 and a recognition processing means 33. The spatial distance image data of the joint portion A ₁ of the strip-shaped member A output from the memory of the three-dimensional coordinate value storage means 22 is
For example, the preprocessing unit 31 based on a three-dimensional image analysis method
Further, noise extraction, thinning, region division, etc. are performed by the feature extraction unit 32 to perform labeling, measurement of the amount of bonding, feature extraction such as linearity, and the recognition processing unit 33 writes the features in a memory (not shown). Whether or not the bonded state is acceptable is determined by comparison with the registered pattern.

For example, when labeling is performed as shown in FIG. 4 (a), the bonding state of the band-shaped member A at the joining portion A ₁ is good, and it is determined that the bonding is OK. When the labeling as shown in FIG. 4B is performed, it is determined that the joint portion A ₁ of the belt-shaped member A is wrapped or separated, and the amount is within a proper range. Whether or not the joint portion A ₁ of the strip-shaped member A wraps or is separated, the patterns are classified according to the identification plane set in the feature space.

The classification means 35 compares the bonding state of the joint portion A ₁ of the strip-shaped member A, which has been determined to be unacceptable (NG) by the recognition processing means 33, with a registered pattern registered in a memory (not shown). , Further subdivide and classify and output.
The database 4 is configured to store and manage the image data classified by the classifying unit 35, and to extract and use desired information from the image data in a desired form.

Next, the content of the control operation of the control unit 3 will be described with reference to the flow chart of FIG. 5 according to the control program written in the memory (not shown). First, in the present embodiment, slit light along the longitudinal direction of the band-shaped member A is obliquely distributed from the projector 1 to the surface of the joint portion A ₁ of the band-shaped member A at an interval of 1 cm in the width direction of the band-shaped member A. Let's make a lot of light. When a step is formed in the joint portion A ₁ of the belt-shaped member A, the bright line S of the slit light on the joint portion A ₁ is not linear as shown in FIG. 1 and is separated into a curved line or two lines. To be done.

Next, the joint portion A on which the slit light is projected.
₁ is read by the camera 2 (step). The position of the peak of the read analog video signal corresponding to the bright line S of the slit light is sequentially detected by the peak position detecting means 11 (step), and temporarily stored in the memory of the peak position storing means 12. Data written in a memory (not shown) and the peak position storage means 1
2 based on the position signal read from
The spatial distance image data (three-dimensional coordinates) of the splicing section A ₁ is calculated by 1 (step), and the calculated three-dimensional coordinates are stored in the memory of the coordinate storage means 22.

The spatial distance image data is coordinate storage means 2
2 is read from the pre-processing means 31 and the feature extracting means 3
The noise extraction, the thinning, and the feature extraction such as region division are performed by 2 and labeling is performed for each of the divided regions (step), and the regions are written in a memory (not shown) by the recognition processing unit 33. The pasted state of the splicing section A ₁ is identified by comparing it with the existing registered pattern, and its acceptance is judged (step). As described above, for example, as described above, when labeling is performed as shown in FIG. 4A, the bonded state at the joint portion A ₁ of the belt-shaped member A is abutted with no wrapping. In this state, the result is good, and it is determined to be OK (OK), and the result is output to a printer or a display unit (not shown) (step).

Similarly, when labeling is performed as shown in FIG. 4B, the joint portion A ₁ of the belt-shaped member A is wrapped,
Alternatively, it is determined that they are apart from each other, and if the rectangular portion of FIG. 5B is above the set identification plane, it is a wrap, and if it is below, it is a lap. To be judged. In the case of wrapping, it is determined whether the wrap amount is within the proper range. This is determined by the area (perimeter, width, etc.) of the rectangle in FIG. 5B. When it is determined that the lap amount is within the proper range, that is, the pass (OK) is obtained, the same output as described above is output (step).

When it is determined that the lap amount is out of the proper range, and when it is determined that the splicing portion A ₁ is separated, it is output to the classification means 35 as a failure (NG), In comparison with the registered pattern registered in the memory, the bonding state of the joint portion A ₁ of the belt-shaped member A is further subdivided and classified into an NG pattern (step), and output in the same manner as described above (step). ), And is stored in the database 4 (step).

As described above, according to the present invention, since the slit light is projected onto the joint portion A ₁ of the belt-shaped member A, the bonding state of the belt-shaped member A such as a tire constituent material at the joint portion A ₁ can be accurately measured. Can be inspected. Also, 10 at 5 mm intervals
By increasing the number of sampling points by projecting zero slit light, it is possible to inspect the surface state of rubber bonding and the bonding amount with high accuracy and to inspect all parts.

Further, by processing the analog signal output from the camera 2 by the peak position detecting means 11, only the bright line can be extracted at high speed without performing image processing such as preprocessing and thinning. Furthermore, when it is determined that the bonding state of the splicing section A ₁ is negative, the data of the splicing section A ₁ is classified into categories and accumulated in the database 4 to bond the strip-shaped member A. The data can be supplied as data required for operation management and diagnosis of the matching device and the like.

Further, in the above-mentioned embodiment, the recognition judging means 3
4, the preprocessing means 31 and the feature extraction means 32 perform noise processing, thinning, and area division for labeling, but other known methods may be used. The present invention is not limited to the above-described embodiments, and the present invention can be implemented in other modes.

[0024]

The present invention is constructed as described above, and the slit light is projected onto the joint portion of the belt-shaped member, which is read by the camera, and based on the position of the peak of the signal output from the camera. The arithmetic processing means calculates the spatial distance image data of the joint portion of the belt-shaped member, and the bonding state of the joint portion is identified from this spatial distance image data to determine whether the result is acceptable or not. There is an effect that it is possible to accurately determine whether or not the bonding state of the joining portion of the members is acceptable. Further, there is an effect that the data can be supplied as the data necessary for performing the operation management and the diagnosis of the bonding device for the band-shaped member based on the data in which the bonding state of the joining portion is determined.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an example of an inspection apparatus for a band-shaped member joint portion according to the present invention.

FIG. 2 is a block diagram of the present invention.

FIG. 3 is an explanatory diagram of a peak position detecting means.

FIG. 4 is an explanatory view of labeling of a joint portion of a belt-shaped member.

FIG. 5 is a flowchart illustrating a signal flow.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Floodlight 2 Camera 3 Control part 4 Database 11 Peak position detection means 21 Arithmetic processing means 34 Recognition determination means 35 Classification means A Strip material A ₁ Joint part S Bright line

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display area // B29L 7:00 4F

Claims (2)

[Claims] 1. A slit light along the longitudinal direction of the strip-shaped member is projected onto the surface of the joint portion of the strip-shaped member in the width direction of the strip-shaped member, and the joint portion on which the slit light is projected is projected by a camera. The peak position corresponding to the bright line of the slit light of the signal read from this camera is read by the peak position detecting means, and the spatial distance of the splicing section is calculated by the arithmetic processing means based on the detected position signal. A method for inspecting a band-shaped member splicing section, which comprises calculating image data, inputting the spatial distance image data to a recognition determining unit, identifying a bonding state of the splicing section, and determining whether the bonding is successful. 2. A light projector for projecting slit light along the longitudinal direction of the band-shaped member in the width direction of the band-shaped member on the surface of the band-shaped member's joint, and a joint for which the slit light is projected. A camera for reading, a peak position detecting means for detecting a position of a peak corresponding to a bright line of the slit light of a signal output from the camera, and a calculation for calculating spatial distance image data of the splicing section based on the position signal. An inspection apparatus for a strip-shaped member splicing section, comprising: a processing unit; and a recognition determining unit that discriminates a bonded state of the splicing unit based on the spatial distance image data and determines whether the bonding is successful or not.