JP2012202957A - Defect position information generation device, defect confirmation system, and defect position information generation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a defect position information generation device and the like for enabling an inspector to speedily identify a defect part in a long sheet material without directly marking the defect part.SOLUTION: In a photography image in which a long sheet material S printing a plurality of combinations of a home position M and a sign for identifying the home position in the longitudinal direction, positions of the home position M and a defect point D are identified, and defect coordinates for showing a position of the defect D are calculated with a nearest or second nearest home position M to the defect D among the identified home positions M as a reference. Defect position information including sign information for showing signs combined with the reference home position M and defect coordinate information showing the calculated defect coordinates are generated.

Description

  The present invention relates to a technical field such as a defect position information generation device that generates defect position information indicating a position of a defect in a long sheet material.

  Conventionally, when inspecting defects (holes, scratches, dents, dirt, adhesion of foreign matter, etc.) in a long sheet material such as polyethylene film, the defect location is identified by the defect identification device in the first stage, and in the second stage. The inspector actually confirms (reviews) the identified defective part.

As shown in FIG. 1, in the first stage, the surface of the sheet material S illuminated by the fluorescent lamp F from the back is photographed by the line sensor camera C while the long sheet material S is conveyed by a conveyance roller (not shown). The captured image is transmitted to a defect identification device (not shown). The defect identification device determines whether or not the sheet material S has a defect D from the received photographed image by a known defect determination method, and when it is determined that there is the defect D, the defect coordinates indicating the position of the defect D Is output. At this time, the defect coordinates are coordinates having the inspection reference position O as the origin. That is, X _n in the defect coordinates (X _n, Y _n) is determined from the width direction distance Lx relative to the inspection standard position O, Y _n are identified from the feeding direction distance Ly relative to the inspection standard position O . The defect coordinates output by the defect identification device are reported to the inspector and used in the second stage.

In the second stage, when the re-rolled sheet material S is conveyed, the inspector searches for a defective portion based on the defect coordinates output by the defect identification device, and determines whether or not the defect is actually set as a defect. However, when the inspector searches for a defect location based on the defect coordinates, there is a case where there is no target to determine whether or not there is a defect at the position indicated by the defect coordinates. This is because of errors in the first stage and the second stage of the rotary encoder (device for measuring the rotation amount of the transport roller) (the error in the distance transported in the first stage and the distance transported in the second stage), the sheet This is due to causes such as expansion and contraction of the material S, slipping of the roll, and the like, and is likely to occur particularly when the value of Y _n of the defect coordinates is large (that is, when the defect position is away from the inspection reference position).

  Therefore, techniques for directly marking defect positions in the first stage are disclosed (for example, Patent Documents 1 and 2). According to this technique, since the defective portion is directly marked, there is an advantage that when the inspector confirms the defect, the defective portion can be found at a glance.

JP 2006-108473 A JP 2011-7779 A

  However, when marking a defective part directly, an advanced technique is required for identifying and accurately marking the defective part before it is conveyed from the upstream inspection position to the downstream marking position. Therefore, there is a problem that the device tends to be expensive. In addition, when there is an error in the defect determination, there is a problem that marking is made at a position that is not a defect, and that portion becomes a defect.

  The present invention has been made in view of such problems and the like, and a defect position information generation device that allows an inspector to quickly identify a defect portion in a long sheet material without directly marking the defect portion. Etc. to be provided.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a defect position information generation device that generates defect position information indicating a position of a defect in a long sheet material conveyed in a longitudinal direction, the origin and A photographed image acquisition means for acquiring a photographed image of the long sheet material in which a plurality of combinations with symbols for identifying the origin are printed in the longitudinal direction, and the origin and the defect in the photographed image obtained And a defect coordinate indicating a position of the identified defect with reference to an origin that is first or second closest to the position of the identified defect among the identified origins. A defect coordinate calculation unit, a defect position information including the symbol information indicating the symbol that forms the combination with the reference origin, and the defect position information including the defect coordinate information indicating the calculated defect coordinate. A position information generating means, characterized in that it comprises a.

  The invention according to claim 2 is the defect position information generation device according to claim 1, wherein the symbol is a number and is printed so as to be a serial number in the longitudinal direction of the long sheet material. It is characterized by that.

  The invention according to claim 3 is the defect position information generation apparatus according to claim 1 or 2, wherein a plurality of the origin and the symbol are printed within a predetermined range in the width direction of the long sheet material, The specifying unit specifies a defect candidate in the acquired captured image, and the position of the specified defect candidate is included in the predetermined range indicated by information indicating the predetermined range in the acquired captured image. When it is determined that there is no defect, the identified defect candidate is identified as the defect.

  Invention of Claim 4 is the defect position information generation apparatus as described in any one of Claims 1 thru | or 3, Comprising: Each said origin is in the predetermined range in the width direction of the said elongate sheet material, Printed at predetermined intervals in the longitudinal direction of the long sheet material, the specifying unit specifies a defect candidate in the acquired captured image, and the position of the specified defect candidate in the acquired captured image It is determined that it is included in the predetermined range indicated by the information indicating the predetermined range, and the position of the identified defect candidate indicates the predetermined interval from the origin specified immediately before in the acquired captured image. When it is determined that the distance is substantially the same as the predetermined distance indicated by the information, the defect candidate is specified as the origin.

  The invention according to claim 5 is the defect position information generation device according to any one of claims 1 to 4, wherein the long sheet material on which a plurality of combinations of the origin and the symbol are printed is provided. The image display device further includes image capturing means for image capturing.

  Invention of Claim 6 is a defect confirmation system which has the defect position information generation apparatus as described in any one of Claims 1 thru | or 5, and a defect confirmation apparatus, Comprising: The said defect confirmation apparatus is the said Defect position information acquisition means for acquiring the defect position information generated by the defect position information generation device, and conveyance for conveying the long sheet material in which the defect position information is generated by the defect position information generation device in the longitudinal direction Means, a printing part photographing means for photographing a portion on which the symbol is printed in the conveyed long sheet material, and the same symbol as the symbol indicated by the symbol information in the acquired defect position information, Transport control means for stopping transport by the transport means when photographed by the means.

  The invention according to claim 7 is a defect position information generation method by a defect position information generation device that generates defect position information indicating a position of a defect in a long sheet material conveyed in the longitudinal direction, the origin and the origin A captured image acquisition step of acquiring a captured image of the long sheet material in which a plurality of combinations with symbols for identifying the longitudinal direction are printed, and the origin and the position of the defect in the acquired captured image And a defect coordinate for calculating a defect coordinate indicating the position of the specified defect with reference to the first or second closest origin to the position of the specified defect among the specified origins The defect position information including the calculation step, the symbol information indicating the symbol that forms the combination with the reference origin, and the defect coordinate information indicating the calculated defect coordinate is generated. A position information generation step, characterized in that it comprises a.

  According to the present invention, out of the origins printed on the long sheet material, the defect coordinate information indicating the defect coordinates based on the origin that is the first or second closest to the defect, and the combination of the origin that is the reference Defect position information including symbol information indicating a formed symbol is generated. Therefore, the defect portion is not directly marked, and the inspector can specify the defect portion by searching for the position indicated by the defect coordinate information on the basis of the origin that is combined with the symbol indicated by the symbol information. That is, since the inspector searches for the defect location based on the origin close to the defect, the defect location is quickly found as compared with the case where the defect location is searched based on the inspection reference position O as shown in FIG. Can be identified.

It is a figure for demonstrating a prior art. (A) It is an example figure which shows a mode that the defect D in the sheet material S in which the mark M was marked in the defect location specification apparatus 1 is detected. (B) It is an example figure of the mark M. It is an example figure used for description about the field used as a candidate for processing. 1 is a block diagram showing a configuration of a defect inspection system 100. FIG. It is an example figure used for description at the time of converting an origin standard defect coordinate into a numbering standard defect coordinate. It is an example figure which shows the mode in operation of the terminal 3 for defect confirmation. It is a flowchart which shows an example of the defect position specific process by the control part 11 of the defect position specific apparatus 1. FIG. It is a flowchart which shows an example of the marking and the defect determination process by the control part 11 of the defect position specific apparatus 1. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, embodiment described below is embodiment at the time of applying this invention in a defect inspection system.

[1. Overview of this embodiment]
In the present embodiment, as shown in FIG. 2A, the inkjet marker 16 (“IJ marker 16”) is not in the vicinity of the end in the width direction of the sheet material S (that is, when the sheet material S is used). Mark M at the position). At this time, the IJ marker 16 marks the first mark M in the vicinity of the leading portion in the transport direction, and thereafter marks the mark M so that the interval between the marks M is a predetermined interval (for example, 1 meter interval).

  As shown in FIG. 2B, the mark M is composed of a combination of a surface origin MO and a surface number MN. The surface number MN is a serial number in which the surface number MN to be marked first is “0001” and “0002”, “0003”,. In the present embodiment, the surfaces to be processed are switched, and each surface is specified by a number indicated by the surface number MN. For example, as indicated by the hatched portion in FIG. 3, the surface P identified by the surface number MN “0001” is composed of a line L-1 passing through the surface origin MO-1 and a line L-2 passing through the surface origin MO-2. It becomes an area delimited by. If the current processing target surface is the surface P specified by the surface number MN “0001”, the next processing target surface is the surface specified by the surface number MN “0002” (ie, the surface origin). (A region divided by a line L-2 passing through MO-2 and a line L-3 passing through the plane origin MO-3).

In the present embodiment, the line sensor camera 12 captures the surface of the sheet material S illuminated from the back surface by the fluorescent lamp 13 while the sheet material S is conveyed by a conveyance roller (not shown). At this time, the captured image is an image including the defect D and the mark M. Then, from the captured image, the defect coordinates (X _d , Y _d ) indicating the position of the defect D are converted into numbering reference defect coordinates (X _n , Y _n ) based on the nearest surface origin MO in the transport direction. . Then, information including the numbering reference defect coordinates (X _n , Y _n ) and the surface number MN paired with the surface origin MO used as a reference at the time of conversion is defined as defect position information. Thereby, when the inspector specifies the position of the defect D, first, the surface including the defect D is specified from the surface number MN included in the defect position information, and then the surface origin MO marked on the surface is used as a reference. By searching for the position indicated by the numbering reference defect coordinates (X _n , Y _n ), the position of the defect D can be specified.

[2. Configuration of defect inspection system 100]
As shown in FIG. 4, the defect inspection system 100 includes a defect position specifying device 1, a server device 2, and a defect confirmation terminal 3. In the defect inspection system 100, the defect position specifying device 1 generates defect position information for specifying the position of the defect D in the sheet material S and transmits it to the server device 2. The server device 2 stores the received defect position information, and transmits the stored defect position information to the defect confirmation terminal 3 when the inspector confirms (reviews) the defect D. The defect confirmation terminal 3 displays the defect position information received from the server device 2 on the display unit so that the inspector can identify the position of the defect D.

[2.1. Configuration of Defect Position Identification Device 1]
The defect position specifying device 1 includes a control unit 11, a line sensor camera 12, a fluorescent lamp 13, a transport roller 14, a rotary encoder 15, an IJ marker 16, a communication unit 17, and a storage unit 18.

  The line sensor camera 12 continuously captures the surface of the sheet material S line by line under the control of the control unit 11, and transmits the captured image to the control unit 11. The control unit 11 stores the captured images in the storage unit 18 and connects the images to form a two-dimensional captured image. The fluorescent lamp 13 is installed at a position facing the line sensor camera 12 and illuminates the sheet material S from the back side. The conveyance roller 14 conveys the sheet material S wound in a roll shape in the conveyance direction under the control of the control unit 11. The rotary encoder 15 outputs a pulse for the control unit 11 to calculate the conveyance distance of the sheet material S based on the rotation angle of the conveyance roller 14 under the control of the control unit 11. The IJ marker 16 marks the mark M with ink at predetermined intervals under the control of the control unit 11. At this time, the control unit 11 counts the pulses output from the rotary encoder 15 and determines whether or not a predetermined distance has been conveyed. The communication unit 17 performs control for transmitting / receiving data to / from the server device 2.

  The storage unit 18 is configured by, for example, an HDD (Hard disk drive) or the like, and stores various programs such as an operating system and application programs. In particular, the storage unit 18 of the present embodiment stores an application program that executes various processes for generating defect position information. Note that the various programs may be acquired from other server devices or the like via a network, or may be recorded on a recording medium and read via an external drive device.

  The control unit 11 includes a CPU (Central Processing Unit) having a calculation function, a ROM (Read Only Memory), a working RAM (Random Access Memory), an oscillation circuit (not shown), and the like. Based on the operation signal, information for controlling each of the constituent members is generated to realize an operation corresponding to the operation information included in the operation signal, and the information is output to the corresponding constituent member. Control the operation of each component.

[2.2. About defect location information]
Next, defect position information generated by the defect position specifying device 1 and stored in the server device 2 will be described. Here, as shown in FIG. 5, when the surface with the surface number MN “0001” is the current processing target and the defect D exists on the surface, the origin reference is based on the origin O (0, 0). A case where the defect coordinates D _d (X _d , Y _d ) are converted into numbering reference defect coordinates D _n (X _n , Y _n ) based on the plane origin MO will be described.

As shown in FIG. 5, a predetermined position in a two-dimensional captured image captured by the line sensor camera 12 is defined as an origin O (0, 0). Further, the center of gravity (the center of the cross) of the surface origin MO-1 on the surface to be processed is defined as the surface origin coordinate MO-1 (X ₀ , Y ₀ ).

In the captured image, the values of X _m1 and X _m2 are set so that the position of the mark M in the width direction (X-axis direction) can be specified. That is, the IJ marker 16 marks the mark M so that the mark M is marked in the range of “X _m1 ” to “X _m2 ”. Thereby, the control part 11 can identify the mark M in a picked-up image from the defect D using _Xm1 and _Xm2 .

Further, the position of the surface origin MO-1 of the mark M on the surface to be processed is specified so that the position in the transport direction (Y-axis direction) of the surface origin MO-2 of the mark M on the surface to be processed next can be specified. The values of Y _m1 and Y _m2 are set with reference to the coordinate Y ₀ . That is, the IJ marker 16 has a predetermined interval so that the surface origin MO-2 of the mark M on the surface to be processed next is marked in the range of “Y ₀ + Y _m1 ” to “Y ₀ + Y _m2 ”. To mark the mark M. As a result, the control unit 11 can identify the surface origin MO-2 and the surface number MN of the mark M on the surface to be processed next using Y _m1 and Y _m2 .

The position in the Y-axis direction of the surface origin MO-1 on the first surface (surface with surface number MN “0001”) cannot be specified using coordinates. That is, there is a possibility that the defect D in the range of “X _m1 ” to “X _m2 ” is determined as the plane origin MO-1. Therefore, when specifying the position of the surface origin MO-1 for at least the first surface, the area and vertical and horizontal dimensions of the surface origin MO are added as determination elements. At this time, the size of the surface origin MO is made sufficiently larger than the size of a general defect, and these defects can be excluded as a criterion, and a value including the size of the surface origin MO is set. To do. In addition, regarding the specification of the position of the surface origin MO on the second and subsequent surfaces, if the area and vertical and horizontal dimensions of the surface origin MO are added as determination elements, the possibility of specifying the position of the surface origin MO by mistake is reduced. be able to.

As shown in FIG. 5, when the defect D exists on the surface having the surface number MN “0001”, the control unit 11 coordinates the coordinate MO-1 (the surface origin MO-1 corresponding to the surface number MN “0001”). Numbering reference defect coordinates D _n with reference to X ₀ , X ₀ ) are calculated. Specifically, the control unit 11 calculates the numbering reference defect coordinates D _n (X _n , X _n ) by (Equation 1).

(X _n , Y _n ) = (X _d −X ₀ , Y _d −Y ₀ ) (Formula 1)

The control unit 11 includes the defect coordinate information indicating the calculated numbering reference defect coordinates D _n (X _n , X _n ) and the surface number information indicating the surface number MN “0001” of the surface currently being processed. Generate information. In addition, the control unit 11 of the present embodiment further uses, as defect position information, a captured image (“trimmed processed captured image”) that has been trimmed so as to include a portion in which the defect D is captured. That is, the defect position information in the present embodiment includes a surface number, numbering reference defect coordinates, and a trimmed processed captured image. Thereby, the inspector can grasp the defect D as character information based on the surface number and the numbering reference defect coordinates, and grasp the defect D as video information from the trimmed processed image included in the defect position information. be able to.

[2.3. Configuration of server device 2]
As illustrated in FIG. 4, the server device 2 includes a control unit 21, a storage unit 22, and a communication unit 23. The communication unit 23 performs control for transmitting / receiving data to / from the defect location specifying device 1 or the defect confirmation terminal 3.

  The storage unit 22 is configured by, for example, an HDD and stores various programs such as an operating system and application programs. Note that the various programs may be acquired from other server devices or the like via a network, or may be recorded on a recording medium and read via an external drive device. Further, the storage unit 22 stores defect position information received from the defect position specifying device 1.

  The control unit 21 includes a CPU having a calculation function, a ROM, a working RAM, an oscillation circuit (not shown), and the like, and is included in the operation signal based on an operation signal from the operation unit. Information for controlling each of the constituent members is generated to realize an operation corresponding to the operation information, and the information is output to the corresponding constituent member to control the operation of the constituent members.

[2.4. Configuration of defect confirmation terminal 3]
The defect confirmation terminal 3 includes a control unit 31, a storage unit 32, a communication unit 33, a transport roller 34, a monitor camera 35, an operation unit 36, and a display unit 37. The defect confirmation terminal 3 is used when the inspector confirms (reviews) the defect D in the sheet material S while referring to the defect position information generated by the defect position identifying device 1.

  The storage unit 32 includes, for example, an HDD and stores various programs such as an operating system and application programs. Note that the various programs may be acquired from other server devices or the like via a network, or may be recorded on a recording medium and read via an external drive device. Further, the storage unit 32 stores defect position information received from the server device 2.

The communication unit 33 performs control for transmitting / receiving data to / from the server device 2. Under the control of the control unit 31, the transport roller 34 transports the sheet material S on which the mark M is marked by the defect position identifying device 1 in the transport direction. As shown in FIG. 6, the monitor camera 35 continuously captures an area where the mark M is marked on the sheet material S being conveyed, and transmits the captured image to the control unit 31. The control unit 31 includes the surface number indicated by the surface number information included in the defect position information (that is, the surface number indicating the surface including the defect D) in the captured image captured by the monitor camera 35 using the image recognition technology. It is determined whether or not the same face number MN is included. When it is determined that the same surface number MN is included, the control unit 31 stops the conveyance roller 34 so that the inspector can check the defect D. At this time, the numbering reference defect coordinates D _n (X _n , X _n ), the surface number, and the trimmed processed captured image are displayed on the display unit 37.

The operation unit 36 receives various operations by the inspector and transmits an operation signal corresponding to the operation to the control unit 31. The display unit 37 displays various operation screens. The display unit 37 displays the surface number, numbering reference defect coordinates D _n and trimming the processed captured images included in the defect position information.

  The control unit 31 includes a CPU having a calculation function, a ROM, a working RAM, an oscillation circuit (not shown), and the like, and is included in the operation signal based on an operation signal from the operation unit. Information for controlling each of the constituent members is generated to realize an operation corresponding to the operation information, and the information is output to the corresponding constituent member to control the operation of the constituent members.

  Next, the defect position specifying process by the control unit 11 of the defect position specifying device 1 will be described using the flowchart shown in FIG. In the present embodiment, the control unit 11 executes the defect position specifying process after the two-dimensional captured image for the entire surface is formed based on the captured image captured by the line sensor camera 12. However, the control unit 11 may perform the defect position specifying process in parallel while forming the two-dimensional captured image.

  First, the control unit 11 of the defect position specifying device 1 performs preprocessing on a two-dimensional captured image formed based on a captured image captured by the line sensor camera 12 (step S1). Specifically, the control unit 11 performs noise removal and shading correction (processing for correcting the luminance unevenness due to the characteristics of the optical system and the imaging system so that the image has uniform brightness).

  Next, the control unit 11 performs a filtering process on the two-dimensional captured image (step S2). Specifically, the control unit 11 performs smoothing processing (moving average filter processing, etc.), edge extraction processing (sovel filter processing, Prewitt filter processing, etc.) and the like to reduce noise in the two-dimensional captured image and to detect defects. Make D stand out.

  Next, the control unit 11 performs a marking / defect determination process, which will be described later with reference to FIG. 8, on the two-dimensional captured image that has been subjected to the preprocessing (step S1) and the filtering process (step S2) (step S3). The process shown in the flowchart ends.

  Next, the marking / defect determination process by the control unit 11 of the defect position specifying apparatus 1 will be described with reference to the flowchart shown in FIG.

  First, the control unit 11 of the defect position specifying device 1 acquires a defect candidate from the surface currently being processed (step S11). Specifically, for example, when the sheet material S is a dark-colored sheet material, the control unit 11 specifies a portion having a luminance exceeding a preset threshold and acquires the portion as a defect candidate. At this time, when there are a plurality of defect candidates on the surface that is currently processed, the control unit 11 sequentially acquires the defect candidates that are located in the transport direction (close to the surface origin MO).

When the control unit 11 acquires one defect candidate in the process of step S11, next, regarding the coordinates (X _d , Y _d ) of the defect candidate, whether or not “X _m1 <X _d <X _m2 ” is satisfied. Is determined (step S12). That is, the control unit 11 determines whether the defect candidate is the mark M by using “X _m1 ” and “X _m2 ”. At this time, if the control unit 11 determines that “X _m1 <X _d <X _m2 ” is not satisfied (step S12: NO), the control unit 11 proceeds to the process of step S17.

On the other hand, when it is determined that “X _m1 <X _d <X _m2 ” is satisfied (step S12: YES), the control unit 11 then determines the coordinates (X _d , Y _d ) of the defect candidate. It is determined whether or not “Y ₀ + Y _m1 <Y _d <Y ₀ + Y _m2 ” is satisfied (step S13). That is, the control unit 11 determines whether the defect candidate is the surface origin MO or the surface number MN. At this time, when it is determined that “Y ₀ + Y _m1 <Y _d <Y ₀ + Y _m2 ” is not satisfied (step S13: NO), the control unit 11 excludes the defect candidate from the defect D. Then, the process proceeds to step S22.

On the other hand, when it is determined that “Y ₀ + Y _m1 <Y _d <Y ₀ + Y _m2 ” is satisfied (step S13: YES), the control unit 11 determines that the defect candidate is the plane origin MO. (Step S14), 1 is added to the counter m indicating the surface number currently being processed (Step S15). However, in step S14, when the control unit 11 determines the surface origin MO-1 on the first surface (the surface of the surface number MN “0001”), as described above, the area and the vertical and horizontal dimensions of the surface origin MO. Is determined. Next, the control unit 11 sets the barycentric position of the surface origin MO as the surface origin coordinates (X ₀ , Y ₀ ) (step S16), and proceeds to the process of step S22.

On the other hand, when it is determined that “X _m1 <X _d <X _m1 ” is not satisfied in the process of step S12 (step S12: NO), the control unit 11 then performs a defect determination process (step S12). S17). Specifically, the control unit 11 determines whether the luminance (or density), shape, area, and the like of the defect candidate exceed a set value set based on a delivery standard (non-defective product standard) or the like. At this time, for example, when the density is higher than a certain density, the defect may be determined even if the area of the defect candidate is smaller than the set value. On the contrary, when the density is lower than a certain density, the defect may not be determined even if the area of the defect candidate is larger than the set value. In this way, various criteria can be set.

As a result of the defect determination process, the control unit 11 determines whether or not the defect candidate is a defect (step S18), and determines that the defect candidate is not a defect (that is, does not catch on the delivery standard (good product standard)) ( Step S18: NO), the process proceeds to step S22. On the other hand, if the control unit 11 determines that it is a defect (that is, it is caught by the delivery standard (good product standard)) (step S18: YES), the defect coordinates (X _d , Y _d ) of the defect are numbered as a standard. The defect coordinates D _n (X _n , Y _n ) are converted (step 19).

Next, the control unit 11, a defect coordinate information indicating the numbering reference defect coordinates D _n, and the surface number information indicating the current surface number m, and a trimming processed captured image to generate a defect position information including (Step 20 ). At this time, the control unit 11 performs a trimming process on the two-dimensional captured image.

  Subsequently, the control part 11 transmits defect position information to the server apparatus 2 (step S21), and transfers to the process of step S22.

  In the process of step S22, the control unit 11 determines whether or not all defect candidates have been acquired (step S22). At this time, when it is determined that all defect candidates have been acquired (step S22: YES), the control unit 11 ends the processing in this flowchart. On the other hand, when it determines with not having acquired all the defect candidates (step S22: NO), the control part 11 transfers to the process of step S11 and acquires the next defect candidate.

As described above, the control unit 11 (“captured image acquisition unit”, “identification unit”, “defect coordinate calculation unit”, defect position identification apparatus 1 (an example of “defect position information generation apparatus”) according to the present embodiment, An example of “defect position information generation means” includes a mark M that is a combination of a surface origin MO (an example of “origin”) and a surface number MN (an example of “symbol”) for identifying the surface origin MO. A photographed image of a sheet material S (an example of a “long sheet material”) that has been marked (printed) in the longitudinal direction (conveyance direction) is acquired, and the position of the surface origin MO and the defect D in the acquired photographed image Is identified. The control unit 11 also includes the surface origin MO included in the currently processed surface among the identified surface origin MOs (that is, the nearest surface origin MO marked in the transport direction from the defect D. “First or Second”. as a reference example) near the origin "to th, calculated numbering reference defect coordinates D _n indicating the position of the specific defect D, shows the surface numbers MN constituting the surface origin MO and combinations as the reference at this time the surface Defect position information including number information (an example of “symbol information”) and defect coordinate information indicating the calculated numbering reference defect coordinate D _n is generated.

  According to the defect position specifying device 1 of the present embodiment, a defect indicating a numbering reference defect coordinate based on the surface origin MO that is the first or second closest to the defect D among the surface origins MO marked on the sheet material S. Defect position information including the coordinate information and the surface number information indicating the surface number MN combined with the reference surface origin MO is generated. Therefore, the defect portion is not directly marked, and the inspector searches for the position indicated by the defect coordinate information with reference to the surface origin MO that is combined with the surface number MN indicated by the surface number information. Can be identified. That is, since the inspector searches for a defective portion with reference to the surface origin MO close to the defect, as compared with the case where the defective portion is searched for based on the inspection reference position O as shown in FIG. The position can be specified.

In the present embodiment, the surface origin MO and the surface number MN are marked at a plurality of positions within a predetermined range in the width direction of the sheet material S (see FIG. 2A), and the control unit 11 of the defect position specifying device 1 Acquires a defect candidate (step S11 in FIG. 8), and the position of the defect candidate indicates a predetermined range (“X _m1 ”, “X _m2 ”) indicating a predetermined range in the two-dimensional captured image (“ X _m1 ”to“ X _m2 ”), the defect candidate is identified as a defect D.

In the present embodiment, each surface origin MO is marked at predetermined intervals (for example, 1 meter) in the longitudinal direction of the sheet material S within a predetermined range in the width direction of the sheet material S (FIG. 2A). The control unit 11 of the defect position specifying device 1 acquires defect candidates (step S11 in FIG. 8), and information indicating the predetermined range in the captured image (“X _m1 ”), "X _{m @ 2")} by determining to be within a predetermined range ( "X _m1" - "X _{m @ 2")} indicated, and, the position of the identified candidate defects, surface origin MO identified just before the captured image If it is determined that the distance is substantially the same as the predetermined distance indicated by the information indicating the predetermined interval (“Y _m1 ”, “Y _m2 ”), the defect candidate is newly specified as the surface origin MO.

  In the present embodiment, the defect confirmation terminal 3 (an example of “defect confirmation device”) conveys the sheet material S on which the defect position information is generated by the defect position identification device 1 in the longitudinal direction (“ And a monitor camera 35 (an example of “printing unit imaging unit”) that captures a portion marked with the surface number MN on the conveyed sheet material S, and a control unit 31 (“defect”). An example of “position information acquisition means” and “conveyance control means” acquires defect position information generated by the defect position specifying device 1, and has the same surface number as the surface number indicated by the surface number information in the acquired defect position information. When the MN is photographed by the monitor camera 35, the conveyance by the conveyance roller 34 is stopped. Thereby, when the surface including the defect D is transported to the position where it is photographed by the monitor camera 35, it automatically stops, so that the inspector can easily confirm the defect D.

  In the present embodiment, the surface number MN is assigned to identify the surface origin MO marked on the sheet material S, but instead of this, a character, a symbol, or a combination thereof is attached. (For example, “A-A”, “A-I”,..., “Z-N”). However, it is considered that it is easier for the inspector to confirm if the numbers are assigned consecutively, such as the surface number MN of the present embodiment.

  Further, in the marking / defect determination process (see FIG. 8), the control unit 11 of the defect position specifying apparatus 1 uses the known image recognition technique (pattern matching) to determine the position of the surface origin MO, the position of the surface number MN, and the numerical value. It is good also as specifying. That is, by storing image data for pattern matching (image data representing the surface origin MO, image data representing numbers, etc.) in the storage unit 18 and comparing it with a photographed image photographed by the line camera 12, The control unit 11 may specify the position of the surface origin MO and the position and numerical value of the surface number MN.

  Moreover, the defect position specifying device 1 of the present embodiment can be applied to a rotary printing machine, a coater for coating the sheet material S, or a part of a rewinding machine.

  Further, in the present embodiment, the control unit 11 of the defect position specifying device 1, as shown in FIG. 3, even when the position of the defect D is closer to the surface origin MO-2 than the surface origin MO-1 Although the numbering reference defect coordinates are calculated based on the surface origin MO-1 of the surface P to be processed, the numbering reference defect coordinates may be calculated based on the nearest surface origin MO-2 from the defect D. . In this case, if the downward direction of FIG. 3 is the positive direction of the Y axis, the Y component of the numbering reference defect coordinate is a negative value.

DESCRIPTION OF SYMBOLS 1 Defect position identification apparatus 11 Control part 12 Line sensor camera 13 Fluorescent lamp 14 Conveyance roller 15 Rotary encoder 16 Inkjet marker 17 Communication part 18 Storage part 2 Server apparatus 21 Control part 22 Storage part 23 Communication part 3 Defect confirmation terminal 31 Control part 32 storage unit 33 communication unit 34 transport roller 35 monitor camera 36 operation unit 37 display unit S sheet material D defect M mark MO surface origin MN surface number

Claims (7)

A defect position information generating device that generates defect position information indicating a position of a defect in a long sheet material conveyed in a longitudinal direction,
Captured image acquisition means for acquiring a captured image of the long sheet material in which a plurality of combinations of an origin and a symbol for identifying the origin are printed in the longitudinal direction;
In the acquired captured image, specifying means for specifying the origin and the position of the defect;
A defect coordinate calculation means for calculating a defect coordinate indicating the position of the specified defect with reference to the first or second closest origin to the position of the specified defect among the specified origin;
Defect position information generating means for generating the defect position information including symbol information indicating the symbol that forms the combination with the reference origin, and defect coordinate information indicating the calculated defect coordinates;
A defect position information generating apparatus comprising: The defect position information generation device according to claim 1,
The defect position information generating apparatus, wherein the symbol is a number and is printed so as to be a serial number in a longitudinal direction of the long sheet material. The defect position information generation device according to claim 1 or 2,
A plurality of the origin and the symbol are printed within a predetermined range in the width direction of the long sheet material,
The specifying means is:
Identify defect candidates in the acquired captured image,
When it is determined that the position of the identified defect candidate is not included in the predetermined range indicated by the information indicating the predetermined range in the acquired captured image, the identified defect candidate is identified as the defect. A defect position information generation apparatus characterized by the above. The defect position information generation device according to any one of claims 1 to 3,
Each origin is printed at predetermined intervals in the longitudinal direction of the long sheet material within a predetermined range in the width direction of the long sheet material,
The specifying means is:
Identify defect candidates in the acquired captured image,
Determining that the position of the identified defect candidate is included in the predetermined range indicated by the information indicating the predetermined range in the acquired captured image; and
When it is determined that the position of the specified defect candidate is substantially the same distance as the predetermined distance indicated by the information indicating the predetermined interval from the origin specified immediately before in the acquired captured image, the defect candidate Is specified as the origin, and the defect position information generating apparatus is characterized. The defect position information generation device according to any one of claims 1 to 4,
A photographing means for photographing the long sheet material on which a plurality of combinations of the origin and the symbol are printed,
A defect position information generation device further comprising: A defect confirmation system comprising the defect position information generation device according to any one of claims 1 to 5 and a defect confirmation device,
The defect checking device is
Defect position information acquisition means for acquiring the defect position information generated by the defect position information generation device;
Conveying means for conveying the long sheet material in which the defect position information is generated by the defect position information generating device in a longitudinal direction;
A printing unit photographing means for photographing a portion on which the symbol is printed in the conveyed long sheet material;
A conveyance control unit that stops conveyance by the conveyance unit when the same symbol as the symbol information in the acquired defect position information is photographed by the printing unit photographing unit;
A defect confirmation system comprising: A defect position information generation method by a defect position information generation device that generates defect position information indicating a position of a defect in a long sheet material conveyed in the longitudinal direction,
A captured image acquisition step of acquiring a captured image of the long sheet material in which a plurality of combinations of an origin and a symbol for identifying the origin are printed in the longitudinal direction;
In the acquired captured image, a specifying step for specifying the origin and the position of the defect;
A defect coordinate calculation step of calculating defect coordinates indicating the position of the specified defect with reference to the first or second closest origin to the position of the specified defect among the specified origin;
A defect position information generating step for generating the defect position information including symbol information indicating the symbol that forms the combination with the reference origin, and defect coordinate information indicating the calculated defect coordinates;
A defect position information generation method comprising:

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