JPH07122616B2 - Paper quality monitoring device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a quality monitoring device applied to paper quality inspection of paper making, coated paper, etc. of a paper machine.

[Conventional technology]

FIG. 8 shows a schematic view of a paper machine. The raw material of the paper ejected from the head box 1 is dehydrated by the wire part 2 and the press part 3,
The dryer 4 heat-drys the paper, and after adjusting the caliper (paper thickness) and the smoothness of the paper surface in the calender 5, the paper is wound by the paper reel 6.

By the way, texture is one of the items of quality inspection of papermaking. The texture means the degree of dispersal and entanglement of paper fibers, and it has generally been judged by visual evaluation through transmitted light through paper. However, judgment of formation requires considerable experience and knowledge, and individual differences often occur due to differences in individual judgment criteria. Further, for visual inspection, the formation could not be evaluated until after the paper was wound on the reel, and therefore the formation could not be evaluated in real time during papermaking. Recently, a device for evaluating formation in real time during papermaking has been put into practical use due to improvement in electronic technology and measurement technology.

FIG. 9 shows a conventional example 1 in which the formation of paper is evaluated on-machine by using a laser beam as one of such devices.
FIG. The formation detector is composed of a laser light source 10 and a light receiver 11, and is usually installed between the calendar 5 and the reel 6. The laser light emitted from the laser light source 10 reaches the light receiver 11 through the paper and is detected as the intensity of the transmitted light. The intensity of this transmitted light is sent to the signal analysis circuit 12 as a formation signal waveform. This signal is digitized by the microcomputer 13 to determine the quality of the texture by an analysis method such as frequency analysis, and is output to the CRT 14 and the printer 15.

FIG. 10 shows Conventional Example 2, in which visible light is applied to the paper in order to match with human visual evaluation, the amount of transmitted light inside a circle a with a diameter of 1 mm and the amount of transmitted light within a circle b with a diameter of 30 mm around it. The average value of is measured by different photodiodes at the same time, and each signal output is logarithmically compressed and compared.
It is said that human vision senses the difference between light and dark in a logarithmic manner, and it has come closer to human evaluation by incorporating the evaluation of area. However, a person's evaluation was subtly different depending on the evaluator, and it was not possible to clearly express the disagreement.

As a drawback of the above-mentioned conventional examples, the formation evaluation is only a numerical value, and the operator cannot perceive it during papermaking. For subtle personal differences, it is necessary to see the formation in a watermark box offline. A conventional example 3 is shown in FIG. 11 as a formation evaluation apparatus which improves this.

In this example, the laser light source 10 of the conventional example 1 (FIG. 9),
Instead of the light receiver 11, a light source generator 31, a video camera 21
Set up. Synchronous signal to the image signal processor 26 or the video camera 21 and the light source generator 31 (the strobe is used, so it is not necessary to consider the shutter speed of the video camera).
Give 51. The strobe 31 flashes in synchronization with the synchronization signal 51, and the video camera captures an image in synchronization with the synchronization signal 51. Since the flash time of the strobe light can be made very short, it is possible to obtain a still image of the running paper.

The two-dimensional image captured by the video camera 21 is sent to the A / D converter 22 as an analog video signal 52, and A
/ D (analog-digital) conversion is performed and the digital video signal 53 is stored in the memory 23. This digital video signal 53 is taken into the image signal processing device 26 by a calling command 54 of the image signal processing device 26, subjected to necessary image processing here, and then sent to the memory 23 again. Further, it is converted into an analog signal again by the D / A converter 24 and displayed on the video monitor 25 as a still image of running paper. Further, the image signal processing device 26 performs frequency analysis by using the digital video signal 53 as a formation signal waveform and performs processing such as dividing the standard deviation of each frequency component by the average value to calculate the formation index. Furthermore, this formation index is converted into a graph or other form that is easy for humans to see, and is displayed on the CRT 27, and is also printed out on the printer 28 as necessary.

In Conventional Example 3, a still image of transmitted light texture can be visually observed during the papermaking operation and can be numerically known, which is a great advance compared with Conventional Examples 1 and 2 above.

However, streaks that sometimes occur at random pitches in the width direction were also evaluated as formations at the same level.

[Problems to be Solved by the Invention]

 The above conventional technique has the following problems.

1) It has been known that texture is greatly influenced by many papermaking factors (eg, raw material concentration, freeness, etc.), but the relationship with fluctuations and variations in papermaking factors is not clear, and operators are Since it was necessary to make various adjustments to the types of actions that should be taken for adjustment, it took time to obtain good results. As one column for the relationship between formation and papermaking factors, raw material ejection velocity (jet velocity)
It is well known in the art that the ratio of jet speed and wire speed greatly changes, and experiments have shown that the quality of formation changes depending on the ratio of jet speed / wire speed as shown in FIG. The jet speed is controlled to a target constant value by feeding the raw material to the head box and controlling the rotation of a fan pump (not shown) and the pressure control of the head box. However, although some fluctuations in the jet velocity due to control responsiveness and fluctuations in the silo surface level are unavoidable, little is known about the fluctuations and the minor effects on formation.

Further, the weighing amount is measured by a weighing instrument provided in front of the reel, and the opening of a seed valve (not shown) is controlled so as to reach the target weighing amount. It is generally known that the density of the headbox affects the quality of the formation, and the degree of the effect varies depending on the type of fiber, the type of the headbox, and the like. Although the factors that influence the formation are conceptually discussed in this way,
Since there is no means to monitor these relationships during papermaking, and because the operator is operating with the experience and feeling of the operator as described above, adjustments cannot be made in a short time.

2) The evaluation based on the unevenness of weighing in the width direction has been put to practical use as a weigher, but if the unevenness in the widthwise direction of the transmitted light is continuous in the flow direction of the paper, it must be evaluated by human eyes. I do not agree. When the operator evaluates the formation, the quality of the formation is often judged by the degree of the aggregate of random fibers smaller than about 10 to 30 mm. Tight fiber flocs with an equivalent diameter of about 2 mm or less are called collapsed formations or sand formations, and when they are fiber flocs with an equivalent diameter of about 10 to 30 mm, they are called floc formations or cloud formations. Random fiber flock shades and sizes are used to evaluate the formation that matches the required paper type. However, when the operator visually observes the transmitted light of the paper, and if the portions of the paper with different transmitted light intensities in the width direction are continuous in the paper flow direction, it is called streak and the texture is evaluated planarly. Are often distinguished. Also, the operator's action for solving this streak is different from the formation improvement. In the conventional land total, only the planar analysis process is executed based on the main point, so there is a problem that the evaluation index is calculated including the influence of streak.

3) When the running paper flutters in front of the camera, the effect of that (low frequency component due to fluttering)
Has been removed by the processor, but since there is no correction for the size of the paper surface per pixel, if the paper surface largely flutters and the distance between the camera and the running paper fluctuates, the initial pixel spacing Since the processing of the dimensions of 1 is performed, an evaluation error may occur.

4) For singular points, such as defects such as pinholes,
At the time of frequency analysis, the influence on the formation due to pinholes is removed by passing through a filter with a wavelength that removes that effect, but the residue left on the upper surface of the paper by the wire part and press part remains as it is (causes the paper to run out). Sometimes it is squashed in the calendar part and wound up on a reel.
It has been taken in as analysis data without adequately dealing with this paper waste.

5) Uneven unevenness in the width direction cannot be evaluated.

6) When the papermaking conditions are changed, that is, when the papermaking is changed, the evaluation corresponding to the change in the weighing cannot be performed.

As described above, there is a shortage of information (for example, information that makes the operator aware of only the streak) necessary for the operator to perform the action necessary to improve the formation in actual operation.

The present invention further improves the conventional texture evaluation device, and enables comprehensive evaluation of the correlation of the texture of the paper with the papermaking factors, and the operator makes the paper of higher quality during the papermaking. It is an object of the present invention to provide a monitoring device for the purpose.

[Means for Solving the Problems]

 The present invention takes the following means to achieve the above object.

That is, as a paper quality monitoring device, a video camera that captures running paper as a still 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 converter, and A first image signal processing device that is connected to a memory, issues a calling command to the memory, inputs the information, and performs formation analysis by frequency analysis or standard deviation processing; and calling the first image signal processing device. A second image signal processing device which receives digital information from the memory in response to a command and analyzes paper defects; and a third image signal processing device which similarly receives digital information from the memory and analyzes streak of paper, The output of the first to third image signal processing devices and signals of the jet speed, wire speed, and raw material concentration of the paper machine are received, Comprising Tsu DOO speed, wire speed and material density and formation index, and an arithmetic unit for performing correlation analysis between streaks, and a display device for displaying the output thereof connected to the computing device.

[Work]

By the above means, the running paper is imaged by the video camera, A / D converted and stored in the memory. The information in the memory is input to the first to third image signal processing devices in response to a call command from the first image signal processing device.
The first image signal processing apparatus performs frequency analysis and standard deviation processing to perform formation analysis. The second image signal processing device also performs paper defect analysis. The third image signal processing device performs streak analysis on paper. The calculating means receives the output signals of the first to third image signal processing devices and the jet speed, wire speed and raw material concentration signals of the paper machine, and outputs the jet speed, wire speed and raw material concentration to the formation and streak. Perform correlation analysis between them. The display device displays the results of the correlation analysis.

In this way, it is possible to easily understand the relationship between the jet velocity, wire velocity, and raw material concentration, which are the factors that contribute to the formation and streak of running paper, and to prevent formation deterioration and streak during papermaking operation. Measures can be taken easily.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a block diagram of the entire structure, FIG. 2 is a side view (partial cross section) of a video camera mounting portion, FIG. 3 is a cross sectional view of a transverse guide portion of the video camera, and FIG. 4 is a video camera and strobe. FIG. 5 is a conceptual diagram of the position detecting scale of the video camera, FIG. 6 is an external view of the operator coresol, and FIG. 7 is an explanatory diagram of streak analysis.

The description of the parts described in the conventional example will be omitted, and the parts relating to the present invention will be mainly described.

In Fig. 1, the CC of the video camera 21 is placed above the running paper.
A D camera is provided, and its output is input to the memory 23 via the A / D converter 22. One output of the memory 23 is input to the CRT 25 via the D / A converter 24. The other output is input to the first image signal processing device 26. A strobe 31 is provided below the paper so as to face the video camera 21. The output of the first image signal processing device 26 is a CRT 27, a printer (PD
R) 28, memory 23, strobe 31, video camera 31. A second image signal processing device 30 and a third image signal processing device 31 are provided to receive the output of the memory 23. An input device 38 and an arithmetic unit 39 having a data memory are provided to output the output signals of the first to third image signal processing devices 26, 30, 31 and papermaking data signals such as the wire speed, jet speed and raw material concentration of the papermaking machine. receive. The first display device
To a fourth CRT 34, 35, 36, 37 and provided with an arithmetic unit 39
Receive the output of. In addition, a floppy desk (FD) 32, a hard desk (HD) 33, a multipoint pen recorder (CHT) 40, a printer (PTR) 41, an input board 42 are connected to the arithmetic unit 39, and the camera 21 and strobe 31 are also connected. It is connected. Further, the arithmetic unit 39 includes a distance signal 57 from the distance sensor 32 of the camera 21, a video camera (camera) 21, and a strobe 31.
The position signals 56 and 58 of are input.

In the above configuration, the first image signal processing device 26 gives the sync signal 51 to the video camera 21 and the strobe 31. The strobe 31 flashes in synchronization with the synchronization signal 51, and the camera 21 captures the image signal 52 in synchronization with the synchronization signal 51. The signal is A / D converted by the A / D converter 22 and stored in the memory 23 as a digital video signal 53. This video signal
Converted back to analog signal by A / D converter 24, CRT25
Is output and displayed as a still image of the original image. The digital video signal 53 on the memory 23 is the first image signal processing device 26.
The image data is taken into the first image signal processing device 26 by the calling command 54, and the necessary image processing such as two-dimensional FFT processing is performed, and the processed image is output to the CRT 27 as a still image. The above process is almost the same as the conventional processing method.

The digital signal sent to the first image signal processor 26 by the call command 54 is also sent to the second and third image signal processors 30 and 31 at the same time. That is, the same image signal is sent to the first to third image signal processing devices.

The second image signal processing device 30 examines whether or not each pixel corresponding to an equivalent diameter of 5 to 10 mm or more on the paper surface is at the same level as the surroundings in order to analyze a paper defect. That is, whether there is a part that is crushed by a calendar and has an abnormally high transparency (abnormally high transmitted light level), or a part where the transmitted light level is abnormally weak due to dirt such as dust in the paper for some reason. Find out. In this way, it is determined whether or not the texture can be evaluated, and the signal 54 of the acceptance is sent to the data memory 29 via the input / output device 38.

The third image signal processing device 31 analyzes streak, which is a type of paper defect. The digital signals sent here are weighted by n pixels in the running direction of the paper in each column for 1 to m rows in the paper width direction (m is the number of pixels in the vertical or horizontal direction of the CCD camera). The average is analyzed as the fiber unevenness of the pixel row. That is, the average of the transmitted light intensities of the i-th column in the width direction is expressed by equation (1).

Here, F (i, j) represents the transmitted light intensity of the pixel in the i-th row and the j-th column (see FIG. 7).

If the minimum width of interest is, for example, three columns, (2)
It is represented by a formula.

The transmitted light unevenness data 55 in the width direction is sent to the data memory 29 via the input / output device. Further, the result data in the first image signal processing device is also stored in the data memory 29 via the input / output device.
Sent to.

In the above analysis example, signal processing is performed for all pixels of one image, but smoothing is performed by moving weighted average of several screens, which will be described later. The number of pixels may be processed. This can be applied to all the first to third image signal processing devices.

The analog signal 57 of the distance between the camera 21 and the paper, the position signal 56 in the width direction of the camera, and the position signal 58 of the strobe are used to clarify the formation image processing data and the papermaking data.
It is sent to the data memory 29 via 38. Further, as papermaking data, wire speed, jet speed, material freeness,
Information on the raw material concentration and the raw material temperature is stored in the data memory 29 via the input / output device 38. The operator inputs data such as foil arrangement from the input board 42. When the second image signal processing device determines that the paper is defective, the image signals processed by the first and third image signal processing devices are processed by the arithmetic device as a numerical evaluation of formation and streak. Not adopted. The image judged to have this defect is recorded on the floppy disk 32 together with the time and place data.

The operator recalls this image, examines the cause, and takes corrective action.

On the display panel shown in FIG. 6, the CRT 25 displays a still image of a paper obtained by a synchronization signal issued at a predetermined time interval. The analysis image of formation is displayed on CRT27. The CRT 34 displays the previously obtained formation target image. CRT35
A formation image of the best formation during papermaking from the designated time is displayed on. The processing time and formation evaluation index are also displayed on this CRT 35, and are retained until the next better formation data is replaced.

The operator has the best formation image (CRT35) before the next extraction
As the next target, it is judged whether or not to replace it with the image of the CRT 34, and if replacement is necessary, a replacement command is issued from the input board 42 of FIG. 1 and the hard disk 33 of FIG. 1 is used as the target image for the next papermaking of the same kind. And floppy disk 32
Store the data in.

The CRT36 displays the formation evaluation index in the image evaluated as having no defects. In the first example, a bar graph is displayed for each floc size based on the power spectrum result by frequency analysis. In the second example, the moving average of the number of designated images of two or more images is displayed for each flock size in, for example, a bar graph. In the third example, the average of designated images in two or more images in the same column in the width direction of the paper is displayed as a line graph at a plurality of designated positions in the width direction. In the fourth example, the root mean square (RMS) of the sum of squares is arbitrarily displayed as a line graph in a plurality of flock sizes that are arbitrarily focused by a specified number of images of two or more.

In other examples, the value of standard deviation, deviation coefficient (standard deviation / average value) and graph according to the specified number of strokes are displayed. When it is necessary to continuously leave it on the recording paper, it can be recorded on the multipoint pen recorder 40. Further, the formation as a time history (trend) regarding the relationship with the papermaking factor is, for example, the progress of the formation evaluation index for one or more papermaking factors such as the raw material concentration and the jet speed / wire speed ratio at that time. You can look it up at.

The CRT 37 is a monitor that monitors streaks in the traveling direction. Depending on the streak width and the machine size (paper width) of interest, the designated number of pixels in the width direction and the total number of one screen in the flow direction are set as an average point, and the light transmission amount ratio in the width direction of the paper is displayed. Since the camera traverses at a right angle to the paper running direction, it actually obtains a diagonal formation image with respect to the paper flow, but the images are captured at the same position in the width direction and the specified number of strokes is taken. It was found that the value of the weighted average or the root mean square of the values does not pose a problem in practical use. In addition, by simultaneously displaying the weighing profile and the moisture profile on the CRT 37, the correlation with the weighing profile becomes clear.

As a measure against the weighing fluctuation, a measure is taken to divide by the average received light intensity of one capture screen (one screen).

Further, in the arithmetic unit, multiple regression calculation with papermaking factors can be performed, and which factor the formation is changing can be displayed in the database, so that the operator can judge from both this numerical value and the CRT screen.

In this way, the formation of the paper or the defect streak can be easily detected and displayed, and the correlation between them and the papermaking data signal such as the wire speed, which is the factor, can be analyzed and displayed. .

In FIG. 2, the camera 21 is fixed to a bracket 104, and the bracket 104 has a screw hole at one end and is attached so as to be screwed with a screw rod 105 via a guide rail (not shown). A screw rod 105 having a vertical axis can be rotated by a motor 103 via a worm and a worm wheel 102. The distance from the camera 21 to the running paper can be determined by rotating the motor 103 to the right or left with a signal from the input board. Most preferably, the motor is a stepper motor that moves in proportion to the control signal. Since the camera 21 can be focused remotely, it can be focused while visually observing the situation of the still image. However, focusing can be performed relatively easily by adjusting the depth of focus appropriately. Since the bracket 104 has the distance sensor 32 for measuring the distance to the running paper, the dimension per pixel of the camera 21 can be easily calculated even if the distance between the camera 21 and the running paper changes slightly due to the flapping of the paper. It is possible. As the distance sensor, a non-contact type sensor using laser or infrared rays is used.

The cover 101 is provided so that the camera 21 is not affected by outside light, and the running paper is not broken even if the running paper at the tip of the cover comes into contact. Also, the distance between the camera 21 and the running paper is usually 0.5 m per pixel
m × 0.5mm, but the motor 103
By rotating, the size per pixel can be increased or decreased. Changing the size per pixel is disadvantageous in that the textures of different papers are visually compared at the same level, but it is effective because the control point of textures can be changed depending on the paper to be made. For example, there is a slight difference in the management points between high-quality paper and high-quality coated base paper, and newsprint and kraft paper are viewed differently.

Although not shown in particular, a strobe up-and-down moving device is provided by the same method in order to keep the amount of light received by the camera at almost the same level when the type of paper or the weight is changed. Further, even if countermeasures are taken as necessary to prevent dew condensation on the inside of the cover or the camera in order to prevent dust from adhering to the camera, it does not invalidate the purpose of this embodiment. .

Although not particularly shown, the strobe light is mounted in a storage box, and one surface in the paper surface direction is provided with a plate that is milky white and allows light to pass therethrough, so that the light is evenly applied to the paper surface.

In FIG. 3, a roller 107 is rotatably attached via brackets 106 attached to both side surfaces of a cover 101 for housing a camera. As shown in FIG. 4, the roller 107 rides on the lower inner surface of the guide 108 that traverses the width of the paper,
Can run in the axial direction of the guide. Guide 108 is post 112,1
Supported by 13, there are synchro belt pulleys 111 on both sides of the guide, and the synchro belt 110 is connected to the camera mount via the synchro belt pulleys. One side of the synchro belt pulley 111 is connected to a variable speed electric motor through a speed reducer (not shown), and is moved from one side to the other side or from the other side to the one side by forward / reverse operation of the electric motor. Further, although not particularly shown, a lateral shake prevention roller is provided to prevent lateral shake of the camera mount. Further, as shown in the figure, the strobe mount is also mounted in the same manner and traverses in the same manner. The strobe and the camera detect the position at the predetermined positions by the position signals 57 and 58, and accurately stop at the predetermined position. As described above, the traverse device for moving the camera 32 in the width direction is provided with the synchro belt, the synchro belt pulley, the variable speed motor, and the like. The variable speed motor is most preferably a pulse motor, and it receives an image processing end signal at a certain position from the arithmetic unit 39 via the input / output unit and moves to the next image processing position by a predetermined distance. The strobe device is also controlled by the motor so as to be at the same position as the camera in the axial direction via the synchro belt and the synchro pulley.

Further, in order to know the accurate position of the camera and strobe device, a position detecting sensor system is attached as shown in FIG. This also serves as a detection of V-belt breakage or slip failure.

A scale 120 having a required number of small-diameter holes or narrow slits with a distance of an accurately determined dimension A is fixed to a guide 108 via a bracket (not shown),
The camera mount of the projector 121 and the light receiver 122 is fixed to the strobe mount by a bracket. When the camera mount moves, the light receiver senses only the light that has passed through the predetermined holes or slits, so that it is possible to know the accurate moving distance and always correct the belt elongation and slip.

In FIG. 1, an example in which three sets of image signal processing devices are used has been described, but one set may be used and the processes may be sequentially performed by software. Also, although an example of using 6 CRTs has been described, 1 CRT for image formation and 1 CRT for data may be used.
Alternatively, the operator may make a selection using a touch panel or a keyboard. Further, it is possible to display the CRT by dividing the screen.

The number of pixels of the CCD camera is not specified, but this is determined by the area of the paper of interest and the minimum size to be analyzed.
A minimum size of 0.5 mm is sufficient for analysis, since it is possible to obtain those with 260,000 pixels or more at a relatively low cost. If there is unevenness in the light intensity around the captured image due to camera characteristics or strobe characteristics, the specified portion inside can be used for analysis.

The following signals are adopted as the signals input to the system of this embodiment as papermaking data.

(A) For example, the jet velocity signal is a signal of a spatial filter type non-contact jet velocity sensor.

(A) The concentration signal of the raw material is the signal of the fiber densitometer based on the polarization of the transmitted light and the transmitted light intensity of a part of the raw material taken out from the head box inlet, or from the freeness meter that continuously measures the on-machine freeness. signal.

(C) The wire speed is a speed signal calculated from the rotation speed of the wire part driving roll or a speed signal of a spatial filter type.

(D) Further, the headbox concentration signal is substituted with a signal indicating the opening state of the seed inlet valve (in some cases).

The quality monitoring device described above can be applied not only to the paper produced by a paper machine but also to the quality monitoring of coated paper. When the coating liquid is applied to the coated base paper, the paper quality may be deteriorated depending on the coating liquid properties (coating liquid viscosity, concentration, etc.) and coating conditions (coating liquid application pressure, etc.). When the paper coated with the coating liquid is viewed with transmitted light, sand streaks (which are called satin finishes in coated paper) and streaks as uneven coating occur as in a paper machine. At present, there is no means to understand these phenomena on-machine, and the operator looks at the watermark box and evaluates it after applying the coating liquid. But,
The correlation between before and after coating is completely unknown, and it is almost unclear whether it is attributed to the base paper or the coating conditions.

Although not particularly shown as an installation example, in such a case, the quality monitoring device described in detail above is attached before and after coating the coating liquid, and the patterns of formation and streak are compared, and the difference is taken to determine the coating liquid coating condition. Can be determined or changed. The factors that are input as the coating liquid coating conditions include the coating amount, coating concentration, viscosity and the like.

In this way, the coated paper can be easily monitored.

〔The invention's effect〕

As described above, the present invention has the following effects.

1) By performing image processing by three formation analysis, defect analysis, and streak analysis, formation evaluation becomes appropriate.

2) Calculating the correlation between the papermaking factor data signal concerning the formation and the formation, and analyzing the standard deviation and variation rate of each data, CR
Since it is displayed on T, the operator can easily determine the action to be taken to improve the formation.

3) By outputting the data to an external storage device (hard disk, floppy disk), the data can be recalled at any time and a detailed examination with past operation data can be performed.

4) On the CRT, the target formation image (the best one of the same paper type in the past), the best formation image during paper-manipulation, the formation image under analysis, etc. can be visually checked at the same time. You can make paper with knowledge of. Also, the new operator,
There is a merit that the skills can be acquired not only by numerical management but also by feeling.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a system according to an embodiment of the present invention, FIG. 2 is a side view (partly sectional view) of a camera mounting portion (in the vicinity of paper) of the embodiment, and FIG. FIG. 4 is a cross-sectional view of the camera traverse guide part, FIG. 4 is an explanatory view of the movement procedure of the camera and strobe of the same embodiment, FIG. 5 is a conceptual diagram of a camera position detection scale of the same embodiment, and FIG. 6 is the same embodiment. Fig. 7 is an external view of the operator console of Fig. 7, Fig. 7 is an example of the procedure of pixel and streak analysis of the CCD camera, Fig. 8 is a block diagram of a conventional paper machine, and Fig. 9 is a block diagram of the formation evaluation device of Conventional Example 1. Fig. 10, Fig. 10 is a block diagram of the formation evaluation device of Conventional Example 2, Fig. 11 is a block diagram of the formation evaluation device of Conventional Example 3, and Fig. 12 is the formation and jet speed / wire speed ratio. It is an example figure which shows a relationship. 21 …… Video camera, 22 …… A / D converter, 23 …… Memory, 24 …… D / A converter, 25 …… CRT, 26,31,30 …… Image signal processor, 27 …… CRT, 28 ...... Printer, 29 …… Data memory, 32 …… Floppy disk, 33 …… Hard disk, 34,35,36,37 …… CRT, 38 …… I / O device, 39 …… Computing device, 40 …… Multipoint Pen type recorder, 41 …… Printer

Claims (1)

[Claims] 1. A video camera that captures a running paper as a static 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 convert, and a memory that is connected to the memory. , A first image signal processing device for issuing a calling command to the memory, inputting the information, and performing formation analysis by frequency analysis or standard deviation processing; and the memory by the calling command of the first image signal processing device. A second image signal processing device which receives digital information from the memory and analyzes paper defects, and a third image signal processing device which receives digital information from the memory and analyzes streak of paper.
Image signal processing device and the outputs of the first to third image signal processing devices, and the jet speed, wire speed, and raw material concentration signals of the paper machine, and the same jet speed, wire speed, raw material concentration, and ground concentration are received. A paper quality monitoring device comprising: a calculation device for performing a correlation analysis between a total index and a streak; and a display device connected to the calculation device and displaying an output thereof.