JP2021091991A - Inspection system - Google Patents

Abstract

To provide an inspection system for inspection of paper and capable of detecting a part of a paper machine where a staining has been formed.SOLUTION: An inspection system is assembled with: a paper machine 10; a first camera part 21 between a wet part W and a drier part D; a second camera part 22 between the drier part D and a reel part R; a control device for obtaining an image taken with the first camera part 21 and the second camera part 22; an arrival time computing part for calculating an arrival time from a distance of paper P in a transportation passage from a first imaging position P1 to a second imaging position P2 and a transportation speed of the paper P; and a numerization computing part for numerization of a state of paper in a first coordinate by using an image taken with the first camera part 21 to obtain first numerical data, and, on passing the arrival time after setting a coordinate by the coordinate setting part, numerization of the state at a second coordinate to obtain second numerical data by setting a position corresponding to the first coordinate of the paper P by using the image taken with the second camera part 22 as the second coordinate.SELECTED DRAWING: Figure 1

Description

The present invention relates to an inspection system, and more particularly to a paper inspection system in a paper machine for producing paper.

In a paper machine, paper is produced from a state in which pulp is dispersed in water by passing through each part such as a wet part including a wire part and a press part, a dryer part, and a reel part.
Further, in the paper machine, from the viewpoint of productivity, the paper (including the state of the wet paper before drying) is conveyed at an extremely high speed. Therefore, it is difficult to visually confirm the error caused by the contamination of the paper.

On the other hand, in paper machines, an inspection system is adopted for quality inspection of manufactured paper.
For example, a video camera that captures a running paper as a stationary two-dimensional image, an A / D converter that receives the output of the video camera, a memory that receives the output of the A / D conversion, and a memory that is connected to the memory and is connected to the memory. Digital information from the above memory by the call command of the first image signal processing device and the first image signal processing device that issues a call command to input the information and performs geological analysis by frequency analysis and standard deviation processing. A second image signal processing device that analyzes defects in the receiving paper, a third image signal processing device that also receives digital information from the memory and analyzes streaks in the paper, and the first to third images. A computing device that receives signals from the output of a signal processor and the jet speed, wire speed, and raw material concentration of a papermaking machine, and analyzes the correlation between the jet speed, wire speed, raw material concentration, and geological index, and streaks. And a paper quality monitoring device including a display device connected to the calculation device and displaying the output thereof are known (see, for example, Patent Document 1).

Special Fair 07-122616

By the way, the defects of paper are often caused by the adhesion of stains to the paper machine. Although the conventional inspection system including the monitoring device described in Patent Document 1 can find the defects of paper, There is a problem that it is not possible to know which part of the paper machine the stain is caused by.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inspection system capable of inspecting paper and recognizing a part of a paper machine in which stains have occurred.

As a result of diligent studies to solve the above problems, the present inventors set coordinates with respect to the paper, and at the first shooting position and the second shooting position, the state of the paper at the coordinates is quantified. We have found that the above problems can be solved, and have completed the present invention.

The present invention is (1) at least in a paper inspection system in a paper making machine for producing paper via a wet part, a dryer part and a reel part, the first method between the paper making machine and the wet part and the dryer part. A first camera unit for photographing the conveyed paper at the photographing position, a second camera unit for photographing the conveyed paper at the second photographing position between the dryer part and the reel part, and the first A control device for acquiring images taken by a camera unit and a second camera unit is provided, and the control device sets a first coordinate having an arbitrary position on the paper as the origin at the first shooting position with respect to the paper. The specific position of the paper reaches from the first shooting position to the second shooting position from the coordinate setting unit to be set, the distance in the paper transport path from the first shooting position to the second shooting position, and the paper transport speed. The arrival time calculation unit that calculates the arrival time until the paper is used, and the image taken by the first camera unit are used to quantify the state of the paper at the first coordinates to obtain the first numerical data, and the coordinate setting unit sets the coordinates. Then, when the arrival time elapses, the position corresponding to the first coordinate of the paper is set as the second coordinate using the image taken by the second camera unit, and the state at the second coordinate is quantified to obtain the second numerical data. It exists in an inspection system having a quantification calculation unit and a quantification by measuring lightness and darkness or RGB measurement.

In the present invention, (2) the control device sets a threshold value for the presence or absence of the occurrence of the unsteady state from the storage unit that stores the occurrence information when the unsteady state occurs and the generation information stored in the storage unit. A threshold value setting unit, a numerical value determination unit that compares the first numerical data and the second numerical data with the threshold value, and determines whether or not a non-steady state has occurred and a part of the papermaking machine in which the unsteady state has occurred. The inspection system according to (1) above, which further comprises.

The present invention is (3) at least in a paper inspection system in a paper making machine for producing paper via a wet part, a dryer part and a reel part, the first method between the paper making machine and the wet part and the dryer part. A first camera unit for photographing the conveyed paper at the photographing position, a second camera unit for photographing the conveyed paper at the second photographing position between the dryer part and the reel part, and the first A control device for acquiring images taken by a camera unit and a second camera unit is provided, and the control device sets a first coordinate having an arbitrary position on the paper as the origin at the first shooting position with respect to the paper. The specific position of the paper reaches from the first shooting position to the second shooting position from the coordinate setting unit to be set, the distance in the paper transport path from the first shooting position to the second shooting position, and the paper transport speed. The arrival time calculation unit that calculates the arrival time until the paper is used, and the image taken by the first camera unit are used to quantify the state of the paper at the first coordinates to obtain the first numerical data, and the coordinate setting unit sets the coordinates. Then, when the arrival time elapses, the position corresponding to the first coordinate of the paper is set as the second coordinate using the image taken by the second camera unit, and the state at the second coordinate is quantified to obtain the second numerical data. The standard first numerical data obtained by quantifying the steady state of the first coordinate using the image taken in advance by the first camera unit and the digitization calculation unit, and the image taken in advance by the second camera unit is used. From the standard quantification calculation unit that digitizes the steady state of the second coordinate as the standard second numerical data, the first calculated value obtained by subtracting the standard first numerical data from the first numerical data, and the second numerical data. The inspection system has a calculation calculation unit for calculating a second calculated value obtained by subtracting the standard second numerical data, and the digitization is performed by light / darkness measurement or RGB measurement.

In the present invention, (4) the control device sets a threshold value for the presence or absence of the occurrence of the unsteady state from the storage unit that stores the occurrence information when the unsteady state occurs and the generation information accumulated in the storage unit. A calculation determination unit that compares the threshold setting unit with the first calculated value and the second calculated value with the threshold value, and determines whether or not a non-steady state has occurred and the part of the papermaking machine in which the unsteady state has occurred. It exists in the inspection system according to (3) above.

According to the present invention, (5) the distance between adjacent coordinates in the X-axis direction among a plurality of coordinates included in the first coordinates when the paper transport direction is the Y-axis and the paper width direction is the X-axis. Is 0.001 to 10 mm, and the distance between adjacent coordinates in the Y-axis direction is 0.001 to 10 mm. The inspection system according to any one of (1) to (4) above.

In the present invention, (6) the control device corrects the position of the first coordinate in the X-axis direction according to the ratio of the width of the paper at the second shooting position to the width of the paper at the first shooting position. It exists in the inspection system according to any one of (1) to (5) above which further has a coordinate correction part.

In the inspection system of the present invention, the first camera unit shoots the paper at the first shooting position and the second camera unit shoots the paper at the second shooting position. Therefore, these images are used between the wet part and the dryer part. , And the state of the paper between the dry part and the reel part can be confirmed. That is, it is possible to recognize the presence or absence of the occurrence of a non-steady state on the conveyed paper.

As used herein, the term "pitch" refers to a sticky contaminant derived from adhesive tape or glue or a sticky contaminant derived from wood among impurities contained in pulp which is a raw material of paper.
Further, "paper break" means that at least a part of the paper is broken.
Further, the "defects" include adhesion of contaminants, extraction of contaminants, holes, water stains, oil stains, uneven concentration of pulp, and the like.
Further, the "unsteady state" means a state in which a defect has occurred or a paper break has occurred in a non-steady state.

In the inspection system of the present invention, the coordinate setting unit sets the first coordinate at the first shooting position with respect to the paper, and the quantification calculation unit quantifies the state of the first coordinate at the first shooting position and reaches it. Based on the arrival time calculated by the time calculation unit, the position corresponding to the first coordinate is set as the second coordinate, and the state of the second coordinate at the second shooting position is quantified to obtain the first coordinate. The numerical data and the second numerical data at the second coordinates can be compared. As a result, it is possible to recognize the occurrence of the above-mentioned unsteady state and the part in which the unsteady state has occurred.

Further, in the inspection system of the present invention, the standard digitization calculation unit calculates the standard first numerical data and the standard second numerical data in advance, and the calculation calculation unit calculates the standard first numerical data from the first numerical data. By calculating the subtracted first calculated value and the second calculated value obtained by subtracting the standard second numerical data from the second numerical data, the first calculated value in the first coordinate and the second calculated value in the second coordinate are calculated. Can be compared.
As a result, so-called noise can be removed, so that it is possible to more accurately recognize the occurrence of the unsteady state and the part in which the unsteady state has occurred.

In the inspection system of the present invention, by adopting brightness measurement or RGB measurement as a means for quantifying, a state in which defects occur (unsteady state) and a state in which defects do not occur (steady state) can be easily determined. Can be identified.

In the inspection system of the present invention, when the threshold value setting unit sets the threshold value in advance, for example, if there is a defect that the color is lightly discolored to the extent that it does not cause a problem, the numerical value determination unit may determine this as a steady state. it can.

In the inspection system of the present invention, among the plurality of coordinates included in the first coordinate, the distance between the adjacent coordinates in the X-axis direction is 0.001 to 10 mm, and the distance between the adjacent coordinates in the Y-axis direction is 0.001 to 10 mm. When the distance is 0.001 to 10 mm, it is possible to recognize even if a defect that the area on the plane is extremely small occurs.

In the inspection system of the present invention, the coordinate correction unit corrects the position of the first coordinate in the X-axis direction according to the ratio of the width of the paper at the second shooting position to the width of the paper at the first shooting position. By using 2 coordinates
It is possible to correct the deviation of the coordinates due to the expansion and contraction of the paper. That is, the specific coordinates in the first coordinate and the second coordinate can be matched.

FIG. 1 is a schematic side view for explaining a hardware portion in the inspection system according to the first embodiment. FIG. 2 is a block diagram for explaining a software portion in the inspection system according to the first embodiment. FIG. 3 is a plan view showing an example in which coordinates are provided on paper in the inspection system according to the first embodiment. FIG. 4 is a block diagram for explaining a software portion in the inspection system according to the second embodiment. FIG. 5 is a schematic side view for explaining a hard part in the inspection system according to another embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as necessary. In the drawings, the same elements are designated by the same reference numerals, and duplicate description will be omitted. In addition, the positional relationship such as up, down, left, and right shall be based on the positional relationship shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios in the drawings are not limited to the ratios shown.

The present invention is a paper inspection system in a paper machine.
Here, the paper on which the inspection system of the present invention is used is not particularly limited as long as it can be manufactured by a paper making machine, and for example, printing paper, newspaper paper, coating paper, wrapping paper, thin leaf paper, toilet paper and tissue paper. Examples thereof include so-called Western paper such as household paper and mixed paper, so-called paperboard such as cardboard base paper, white paperboard, colored paperboard, paper tube base paper, building material base paper, and various mounts.

First, a first embodiment of the inspection system according to the present invention will be described. In this specification, the paper transport direction is the Y-axis, and the paper width direction is the X-axis.
FIG. 1 is a schematic side view for explaining a hardware portion in the inspection system according to the first embodiment.
As shown in FIG. 1, the inspection system 1 according to the first embodiment includes a paper machine 10, a first camera unit 21 and a second camera unit 22 for photographing the conveyed paper P, and a first camera unit. A control device (not shown) for acquiring images captured by the 21 and the second camera unit 22 is provided.

The paper machine 10 has at least a wet part W, a dryer part D, and a reel part R (hereinafter, these are simply referred to as "parts"). That is, the paper is produced at least via the wet part W, the dryer part D, and the reel part R.
Specifically, the paper machine 10 places the felt 11 for charging the dispersion liquid in which pulp is dispersed in water and the charged dispersion liquid on the wire 13 for paper making, and naturally drops excess water. A press that transfers the moisture in the paper to the felt 15 and dehydrates the paper P by passing the wire part 12a and the wire part 12a between the pair of press rolls 14 and pressing the wire part 12a with the press roll 14 via the felt 15. The wet part W composed of the parts 12b and the paper P that has passed through the press part 12b are dried by being brought into contact with the heated cylinder 17 via the cambus 16 and the paper P between the calendar roll 18 and the dryer part D. It has a calendar part C that smoothes the unevenness of the surface through the paper, and a reel part R that winds the paper onto the spool 19.
A first shooting position P1 in which the first camera unit 21 is installed is provided between the wet part W and the dryer part D, and between the dryer part D and the reel part R (more specifically, the calendar part). A second shooting position P2 in which the second camera unit 22 is installed is provided between C and the reel part R).

In the paper machine 10, each part is provided with an applying device X for applying water, a chemical solution, air, or the like.
The chemical solution to be applied is not particularly limited, and a wet paper strength agent, a cleaning agent, a stain inhibitor, a pitch control agent, a release agent, a crepe control agent, an anti-slip agent, etc. are appropriately adopted according to the performance to be applied. be able to.
Further, the cylinder 17 is in contact with a doctor blade 17a for removing contaminants adhering to the surface of the cylinder 17.

As described above, in the paper machine 10 in operation, the first camera unit 21 photographs the surface of the conveyed paper P at the first photographing position P1 between the wet part W and the dryer part P. Thereby, the state of the paper that has passed through the wet part W can be confirmed.
Similarly, the second camera unit 22 covers the surface of the paper P to be conveyed at the second shooting position P2 between the dryer part D and the reel part R (more specifically, between the calendar part C and the reel part R). Take a picture. Thereby, the state of the paper that has passed through the wet part W and the dryer part D can be confirmed.
From these things, it is possible to confirm whether or not a non-steady state is generated in the conveyed paper P.

Here, the first camera unit 21 and the second camera unit 22 are each composed of a plurality of surveillance cameras arranged in the X-axis direction. As the surveillance camera, a commercially available one can be appropriately adopted.
In the inspection system, a part of the image of the page taken by each surveillance camera is combined to form an image of the entire page. Therefore, the image quality of the entire paper can be made higher than that of using one surveillance camera.
Specifically, the resolution of the image on the entire paper surface is preferably 10 to 500 MHz.

FIG. 2 is a block diagram for explaining a software portion in the inspection system according to the first embodiment.
As shown in FIG. 2, the control device 3a performs arithmetic analysis based on a storage unit 40 including a main storage unit composed of a ROM and a RAM and an auxiliary storage unit such as a hard disk, and a program stored in the storage unit 40. An ordinary computer having a calculation unit (CPU) 30 to perform, an output unit 41 such as a monitor or a printer that displays the result processed by the calculation unit 30, an input unit 42 such as a keyboard or a mouse, and a control unit 43 to control these. Is.
Further, the control device 3a includes a coordinate setting unit 31, an arrival time calculation unit 32, a digitization calculation unit 33, a threshold value setting unit 34, and a numerical value determination unit 35a. These correspond to the arithmetic unit 30, and perform arithmetic analysis based on each program stored in the storage unit 40.

In the paper machine 10 in operation, the control device 3a includes a paper image (hereinafter, also referred to as "first image") photographed by the first camera unit 21 at the first photographing position P1 and a second camera unit 22. A paper image (hereinafter, also referred to as "second image") photographed at the second photographing position P2 is acquired via a wired or wireless network.
Then, those images are stored in the storage unit 40.

FIG. 3 is a plan view showing an example in which coordinates are provided on paper in the inspection system according to the first embodiment. The arrow in FIG. 3 indicates the transport direction of the paper P.
As shown in FIG. 3, the paper P produced by the paper machine 10 has a long shape. In addition, in FIG. 3, a plurality of defects K occur in the paper P, and the paper P is in an unsteady state.
In the inspection system, the coordinate setting unit 31 sets a virtual first coordinate having an arbitrary position of the paper P as the origin with respect to the paper P by using the first image stored in the storage unit.

Here, as the position to be the origin, for example, the front end of the strip-shaped paper P that has reached the first shooting position P1 is the origin of the Y axis (Y = 0), and the left end of the paper P is the origin of the X axis (X = 0). It may be 0). That is, the left edge of the front edge of the paper P may be (X, Y) = (0,0).
The value of Y may increase toward the upstream side along the longitudinal direction of the paper P, and the value of X may increase from the left end to the right end.

At this time, among the plurality of coordinates included in the first coordinate, the distance between the adjacent coordinates in the X-axis direction is 0.001 to 10 mm, and the distance between the adjacent coordinates in the Y-axis direction is 0.001. It is preferably 10 mm.
In this case, even if the paper P has a defect K having an extremely small area on a plane, it is quantified by the quantification calculation unit 33 described later, so that it can be reliably recognized.

Returning to FIG. 2, the arrival time calculation unit 32 calculates the arrival time from the first photographing position P1 to the second photographing position P2 at the specific position of the paper P.
Specifically, when the distance in the transport path of the paper P from the first shooting position P1 to the second shooting position P2 is H and the transport speed of the paper P is V, the time T is
T = H / V
It is calculated by the formula of.
Therefore, since the distance H is set in advance, the time T is calculated by inputting the transport speed V by the input unit 42. The transport speed V can be calculated from the rotation speed of the roll that guides the paper P and the like.
If the transport speed V of the paper P is not constant, the average speed of the paper P between the first shooting position P1 and the second shooting position P2 may be adopted.

The digitization calculation unit 33 digitizes the state of the paper P at the first coordinate using the first image to obtain the first numerical data, and digitizes the state of the paper P at the second coordinate using the second image to obtain the first numerical data. 2 Numerical data.
In the digitization calculation unit 33, after the coordinate setting unit 30 sets the first coordinate, when the above-mentioned arrival time T elapses, the position corresponding to the first coordinate of the paper P is virtually set by using the second image. It is the second coordinate.
As a result, the first coordinate of the specific position of the paper P coincides with the second coordinate when the arrival time elapses. Therefore, by comparing the same coordinates of the first image and the second image, the paper P can be compared. It becomes possible to recognize the presence or absence of the occurrence of the defect K during transportation.

Here, the quantification is based on the brightness measurement or the RGB measurement.
For example, when the quantification is based on the brightness measurement, the video may be converted into a black-and-white binary image by gray scale, and the shading may be quantified in 256 steps of 0 to 255, for example.
Further, when the quantification is based on RGB measurement, a specific color (for example, blue) may be quantified.
In this way, since the inspection system employs brightness measurement or RGB measurement as a means for quantifying, there are a state in which defects occur (unsteady state) and a state in which defects do not occur (steady state). Can be easily identified.

Then, by comparing the first numerical data at the first coordinate and the second numerical data at the second coordinate, the part in which the unsteady state has occurred can be inferred. For example, when a numerical value changes between the first numerical data at the specific position of the first coordinate and the second numerical data at the specific position of the corresponding second coordinate, an unsteady state occurs in the dryer part D. It will be.

In addition to the first video and the second video described above, the storage unit 40 stores information generated when a non-steady state occurs.
The generated information means information such as the coordinates of the defect, the numerical data of the defect, the presence / absence of a paper break, and the generated part.

The threshold value setting unit 34 sets a threshold value for the presence or absence of the occurrence of a non-steady state from the generation information stored in the storage unit 40. For example, a threshold value is set so as to exclude numerical data of defects that do not cause a problem from the accumulated occurrence information. The threshold value can be changed arbitrarily.
As a result, when there is a defect that the color is lightly discolored to the extent that it does not cause a problem, the numerical value determination unit described later can determine this as a steady state.

The numerical value determination unit 35a compares the first numerical data and the second numerical data with the threshold value, and determines whether or not a non-steady state has occurred and the part of the paper machine in which the unsteady state has occurred.
The determined result is output by the output unit 41 as needed.

Next, a second embodiment of the inspection system according to the present invention will be described. Since the hardware portion of the inspection system is the same as that of the inspection system according to the first embodiment, the description thereof will be omitted.
FIG. 4 is a block diagram for explaining a software portion in the inspection system according to the second embodiment.
As shown in FIG. 4, the control device 3b is a storage including a main storage unit composed of a ROM and a RAM and an auxiliary storage unit such as a hard disk, similarly to the control device 3a of the inspection system according to the first embodiment described above. Unit 40, a calculation unit (CPU) 30 that performs arithmetic analysis based on a program stored in the storage unit 40, an output unit 41 such as a monitor or a printer that displays the result processed by the arithmetic unit 30, a keyboard or a mouse. It is an ordinary computer having an input unit 42 such as, and a control unit 43 for controlling them.
Further, the control device 3a includes a coordinate setting unit 31, an arrival time calculation unit 32, a quantification calculation unit 33, a standard quantification calculation unit 33a, a calculation calculation unit 33b, a threshold value setting unit 34, and a calculation determination unit 35b. .. These correspond to the arithmetic unit 30, and perform arithmetic analysis based on each program stored in the storage unit 40.
The coordinate setting unit 31, the arrival time calculation unit 32, the quantification calculation unit 33, and the threshold value setting unit 34 are the coordinate setting unit 31, the arrival time calculation unit 32, and the quantification calculation of the inspection system according to the first embodiment described above. Since it is the same as the unit 33 and the threshold value setting unit 34, the description thereof will be omitted.

The standard digitization calculation unit 33a digitizes the steady state of the first coordinate using the image previously captured by the first camera unit to obtain standard first numerical data, and uses the image previously captured by the second camera unit. The steady state of the second coordinate is quantified and used as the standard second numerical data.
That is, the standard first numerical value data corresponds to the so-called blank data of the first numerical value data, and is in a state (steady state) in which the first numerical value data is photographed in advance by the first camera unit 21 and can be stably manufactured without any defects. It is a numerical value of the image.
Similarly, the standard second numerical data corresponds to the so-called blank data of the second numerical data, and is in a state (steady state) in which the second numerical data is photographed in advance by the second camera unit 22 and can be stably manufactured without any defects. It is a numerical value of the image of.

The calculation calculation unit 33b calculates the first calculated value obtained by subtracting the standard first numerical data from the first numerical data, and the second calculated value obtained by subtracting the standard second numerical data from the second numerical data. Thereby, so-called noise can be removed.
Then, by comparing the first calculated value at the first coordinate and the second calculated value at the second coordinate, the part in which the unsteady state occurs can be inferred more accurately. For example, when the first calculated value of the specific position of the first coordinate and the second calculated value of the corresponding specific position of the second coordinate are substantially the same value and the value is large, the wet part W is unsteady. When a state has occurred and a numerical value changes between the first calculated value of the specific position of the first coordinate and the second calculated value of the corresponding specific position of the second coordinate, the dryer part D is used. An unsteady state has occurred.

The calculation determination unit 35b compares the first calculated value and the second calculated value with the threshold value, and determines whether or not a non-steady state has occurred and the part of the paper machine in which the unsteady state has occurred. , If necessary, it is output by the output unit 41.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

In the inspection system according to the first embodiment and the inspection system according to the second embodiment, the control unit may further have a coordinate correction unit for correcting the deviation of the second coordinate with respect to the first coordinate. The coordinate correction unit corresponds to the calculation unit 30, and performs arithmetic analysis based on the program stored in the storage unit 40.
For example, the correction of the deviation in the X-axis direction is to correct the position of the X-axis of the first coordinate according to the ratio of the width of the paper P at the second shooting position P2 to the width of the paper P at the first shooting position P1. May be the X-axis of the second coordinate.
Further, to correct the deviation in the Y-axis direction, marks are provided at regular intervals on the edge of the paper P, and the mark spacing at the second shooting position P2 is proportional to the mark spacing at the first shooting position P1. The position of the Y-axis of the 1-coordinate may be corrected and used as the Y-axis of the 2nd coordinate.
As a result, it is possible to correct the deviation of the coordinates due to the expansion and contraction of the paper. That is, the specific coordinates in the first coordinate and the second coordinate can be matched.

The inspection system according to the first embodiment and the inspection system according to the second embodiment include a paper machine 10, a first camera unit 21, a second camera unit 22, and a control device (not shown). However, a camera unit may be further provided.
FIG. 5 is a schematic side view for explaining a hard part in the inspection system according to another embodiment.
For example, as shown in FIG. 5, a camera unit 23a for photographing the front surface of the paper P and a camera for photographing the back surface of the paper P between the wire part 12a and the press part 12b (upstream press part group 12b1). A portion 24a is provided, and a camera portion 23b for photographing the surface of the paper P is provided between the upstream press part group 12b1 and the downstream press part group 12b2 of the press part 12, and the wet part W (downstream press part group 12b2) is provided. ) And the dryer part D (upstream dryer part group D1), a first camera unit 21 for photographing the front surface of the paper P and a camera unit 24b for photographing the back surface of the paper P are provided, and the dryer part D is provided. A camera unit 23c for photographing the front surface of the paper P and a camera unit 24c for photographing the back surface of the paper P are provided between the upstream dryer part group D1 and the downstream dryer part group D2 of the above, and the dryer part D (downstream). A camera unit 23d for photographing the front surface of the paper P and a camera unit 24d for photographing the back surface of the paper P are provided between the dryer part D2) and the calendar part C, and the calendar part C and the reel part R are provided. A second camera unit 22 for photographing the front surface of the paper P and a camera unit 24e for photographing the back surface of the paper P may be provided between them.
In this case, it is possible to recognize the presence or absence of an unsteady state on the conveyed paper from the images of each camera unit.
Further, by setting the corresponding coordinates from the image of each camera unit and comparing the numerical data at the coordinates with each other, it is possible to recognize the location where the unsteady state occurs between the camera units.
That is, the inspection system according to the first embodiment and the inspection system according to the second embodiment can be used for those using each camera unit.

In the inspection system according to the first embodiment and the inspection system according to the second embodiment, both the first camera unit 21 and the second camera unit 22 have a plurality of surveillance cameras arranged in the X-axis direction. However, the position where it is arranged is not limited to this.
For example, the photograph may be taken from diagonally above or diagonally below the paper. In this case, by processing the image, the paper is converted into a long shape, and then the coordinates are provided.

In the inspection system according to the first embodiment and the inspection system according to the second embodiment, when setting the coordinates, the position where the origin is set is that the front end of the paper P is the origin of the Y axis (Y = 0) and the left end of the paper P. Is the origin of the X-axis (X = 0), but the present invention is not limited to this.

In the inspection system according to the first embodiment and the inspection system according to the second embodiment, the digitization of the image is based on the brightness measurement or the RGB measurement, but the present invention is not limited to this, and shading processing, pattern search, and the like. It is also possible to adopt edge detection or the like.

The inspection system of the present invention can be used as a system for inspecting manufactured paper in a paper machine.
According to the inspection system of the present invention, it is possible to inspect the paper and recognize the part of the paper machine where the stain is generated.

3a ... Control device 10 ... Paper machine 11 ... Inred 12a ... Wire part 12b ... Press part 12b1 ... Upstream press part group 12b2 ... Downstream press part group 13 ... Wire 14 ... Press roll 15 ... Felt 16 ... Cambus 17 ... Cylinder 18 ... Calendar roll 19 ... Spool 21 ... 1st camera unit 22 ... 2nd camera unit 23a , 23b, 23c, 23d, 24a, 24b, 24c, 24d, 24e ... Camera unit 30 ... Calculation unit 31 ... Coordinate setting unit 32 ... Arrival time calculation unit 33 ... Digitization calculation unit 33a ・ ・ ・ Standard digitization calculation unit 33b ・ ・ ・ Calculation calculation unit 34 ・ ・ ・ Threshold setting unit 35a ・ ・ ・ Numerical value judgment unit 35b ・ ・ ・ Calculation judgment unit 40 ・ ・ ・ Storage unit 41 ・ ・ ・ Output unit 42・ ・ ・ Input unit 43 ・ ・ ・ Control unit C ・ ・ ・ Calendar part D ・ ・ ・ Dryer part D1 ・ ・ ・ Upstream dryer part group D2 ・ ・ ・ Downstream dryer part group K ・ ・ ・ Disadvantage P ・ ・ ・ Paper P1・ ・ ・ 1st shooting position P2 ・ ・ ・ 2nd shooting position R ・ ・ ・ Reel part W ・ ・ ・ Wet part X ・ ・ ・ Applying device

Claims (6)

At least in the paper inspection system in a paper machine for producing paper via a wet part, a dryer part and a reel part.
At the first photographing position between the paper machine, the wet part and the dryer part, a second photographing between the first camera unit for photographing the conveyed paper and the dryer part and the reel part. It is provided with a second camera unit for photographing the paper conveyed at a position, and a control device for acquiring images captured by the first camera unit and the second camera unit.
The control device
At the first shooting position, a coordinate setting unit that sets the first coordinates with the origin at an arbitrary position on the paper with respect to the paper.
From the distance in the paper transport path from the first shooting position to the second shooting position and the transport speed of the paper, until the specific position of the paper reaches the second shooting position from the first shooting position. The arrival time calculation unit that calculates the arrival time, and
Using the image taken by the first camera unit, the state of the paper at the first coordinates is quantified to obtain the first numerical data, and when the arrival time elapses after the coordinate setting unit sets the coordinates. , A quantification calculation in which the position corresponding to the first coordinate of the paper is set as the second coordinate using the image captured by the second camera unit, and the state at the second coordinate is quantified to obtain the second numerical data. Department and
Have,
An inspection system in which the quantification is based on light / darkness measurement or RGB measurement. The control device
A storage unit that stores information generated when an unsteady state occurs,
From the generation information stored in the storage unit, a threshold value setting unit that sets a threshold value for the presence or absence of the occurrence of the unsteady state, and a threshold value setting unit.
A numerical value determination unit that compares the first numerical data and the second numerical data with the threshold value and determines whether or not the unsteady state has occurred and the part of the paper machine in which the unsteady state has occurred. ,
The inspection system according to claim 1, further comprising. At least in the paper inspection system in a paper machine for producing paper via a wet part, a dryer part and a reel part.
At the first photographing position between the paper machine, the wet part and the dryer part, a second photographing between the first camera unit for photographing the conveyed paper and the dryer part and the reel part. It is provided with a second camera unit for photographing the paper conveyed at a position, and a control device for acquiring images captured by the first camera unit and the second camera unit.
The control device
At the first shooting position, a coordinate setting unit that sets the first coordinates with the origin at an arbitrary position on the paper with respect to the paper.
From the distance in the paper transport path from the first shooting position to the second shooting position and the transport speed of the paper, until the specific position of the paper reaches the second shooting position from the first shooting position. The arrival time calculation unit that calculates the arrival time, and
Using the image taken by the first camera unit, the state of the paper at the first coordinates is quantified to obtain the first numerical data, and when the arrival time elapses after the coordinate setting unit sets the coordinates. , A quantification calculation in which the position corresponding to the first coordinate of the paper is set as the second coordinate using the image captured by the second camera unit, and the state at the second coordinate is quantified to obtain the second numerical data. Department and
The standard first numerical data obtained by quantifying the steady state of the first coordinates using the image previously captured by the first camera unit is used, and the second coordinate using the image previously captured by the second camera unit. A standard quantification calculation unit that uses the standard second numerical data that quantifies the steady state of
A calculation calculation unit that calculates a first calculated value obtained by subtracting the standard first numerical data from the first numerical data, and a second calculated value obtained by subtracting the standard second numerical data from the second numerical data.
Have,
An inspection system in which the quantification is based on light / darkness measurement or RGB measurement. The control device
A storage unit that stores information generated when an unsteady state occurs,
From the generation information stored in the storage unit, a threshold value setting unit that sets a threshold value for the presence or absence of the occurrence of the unsteady state, and a threshold value setting unit.
A calculation determination unit that compares the first calculated value and the second calculated value with the threshold value, and determines whether or not the unsteady state has occurred and the part of the paper machine in which the unsteady state has occurred. The inspection system according to claim 3, further comprising. When the transport direction of the paper is the Y axis and the width direction of the paper is the X axis, the distance between adjacent coordinates in the X axis direction among the plurality of coordinates included in the first coordinate is 0.001. The inspection system according to any one of claims 1 to 4, which is 10 mm and the distance between adjacent coordinates in the Y-axis direction is 0.001 to 10 mm. The second coordinate is obtained by modifying the position of the first coordinate in the X-axis direction according to the ratio of the width of the paper at the second shooting position to the width of the paper at the first shooting position. The inspection system according to any one of claims 1 to 5, further comprising a coordinate correction unit.

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