Operation monitoring device

Abstract

To provide an operation monitoring device that supports formation of a wound paper roll with high roundness.SOLUTION: The operation monitoring device according to an embodiment comprises an image processing unit, a computation unit, and a storage unit. The image processing unit processes first image data of a side surface of a wound paper roll to extract a first contour of the side surface. The computation unit sequentially calculates the roundness of the first contour based on the first contour and a first coordinate representing the center of the wound paper roll. In a data collection mode, the computation unit stores time-series data in the storage unit, which include the roundness, a first actual speed of a first motor that drives a winding device, and a second actual speed of a second motor that drives a feeding device collected from a control device, in a time-synchronized manner. In a compensation output control mode, the computation unit outputs a compensated control signal to suppress variations in the first time-series data, based on a compensation value of a compensation function set using the time-series data collected in the data collection mode.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] SUMMARY OF THE INVENTION An embodiment of the present invention relates to an operation monitoring device for monitoring the operation of a winder system for sheet-like products such as sanitary paper and plain paper. [Background technology]

[0002] Paper manufactured using a Fourdrinier paper machine is generally manufactured in widths of 4 meters or more, and is wound up at that width to produce rolled paper, from the perspective of production efficiency, etc. Such wide paper rolls are rarely shipped in their wide width due to various reasons, such as transportation restrictions, restrictions on printing on paper rolls at the customer's side, and restrictions on the width requirements of paper roll processing machines.

[0003] In some cases, an already wound paper roll is fed into a winder system, cut to the required width, and then the length is readjusted as needed, and the roll is rewound into a small roll that meets the specifications of the customer's printing machine before being shipped.

[0004] At printing plants and other locations, the paper rolls divided into smaller rolls are delivered to printing presses and other devices in the same state as when they arrive, and printing is performed on them. If the side shape of the paper roll is out of round, the paper roll may flap when it is put through the printing press, causing paper breaks and misaligned printing, resulting in improper printing, or the flapping paper may get caught in the printing press. For this reason, it is desirable for the winder system to wind the paper roll with high roundness. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2023-89140 [Patent Document 2] Patent No. 7099635 Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE INVENTION An object of embodiments of the present invention is to provide an operation monitoring device that assists in forming a web roll with high roundness. [Means for solving the problem]

[0007] An operation monitoring device according to an embodiment of the present invention includes an image processing unit that processes first image data of the side surface of a paper roll being wound by a winding device, the first image data being continuously acquired by a first imaging device, to extract a first contour of the outer periphery of the side surface of the paper roll, a calculation unit that sequentially calculates the roundness of the first contour based on the first contour and first coordinates of a center calculated based on the contour of a core that winds paper at the center of the paper roll, and a memory unit that stores data on the roundness of the first contour as first time-series data. The calculation unit has a data collection mode and a compensation output control mode. In the data collection mode, the calculation unit collects second time series data of a first actual speed value of a first motor that drives the winding device and third time series data of a second actual speed value of a second motor that drives a delivery device that delivers paper to the winding device from a control device that controls the first motor and the second motor, and stores the first time series data, the second time series data, and the third time series data in the memory unit in a time-synchronized manner. In the compensated output control mode, the calculation unit sets a compensation function having a compensation value that is set to suppress fluctuations in the value of the first time series data based on the correlation between the first time series data and the difference between the second time series data and the third time series data. The calculation unit continuously collects the first time series data, the second time series data, and the third time series data, and compensates the first actual speed value or the second actual speed value based on the compensation function so as to suppress fluctuations in the value of the first time series data, and outputs the compensated value to the control device. [Effects of the Invention]

[0008] According to an embodiment of the present invention, an operation monitoring device can be provided that assists in forming a web roll with high roundness. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram illustrating a winder system. [Figure 2] 1 is a schematic block diagram illustrating an operation monitoring device according to an embodiment. [Figure 3] 10 is a schematic diagram illustrating an example of a captured image of the side surface of a paper roll. FIG. [Figure 4] FIG. 10 is a schematic diagram illustrating a captured image of a side surface of a delivery roll. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments will be described with reference to the drawings. The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between parts, etc. are not necessarily the same as those in reality. Furthermore, even when the same part is shown, the dimensions and ratios may be different depending on the drawing. In the present specification and the drawings, elements similar to those described above with reference to the previous drawings are designated by the same reference numerals, and detailed descriptions thereof will be omitted as appropriate.

[0011] FIG. 1 is a schematic diagram illustrating a winder system. As shown in FIG. 1, a winder system 108 to which the operation monitoring device 10 according to the embodiment is applied includes a winding device 100, a feeding device 101, a rear drum 102, a front drum 103, guide rolls 104 and 105, and a rider roll 106.

[0012] In such a winder system 108, the paper sheet 300 is fed from a feed roll 200 set on a spool 202 of a feed device 101. The fed paper sheet 300 passes through guide rolls 104 and 105 and reaches the winding device 100. The winding device 100 is made up of a rear drum 102, a front drum 103, and a rider roll 106. The paper sheet 300 is placed on the rear drum 102 and the front drum 103, sandwiched between these two drums and the rider roll 106, and wound onto a core 201.

[0013] The speed of the motor that drives the spool 202 of the unwinding device 101 and the speed of the motor that drives the rear drum 102 and the front drum 103 of the winding device 100 are controlled appropriately at the appropriate time. This allows the tension of the paper 300 to be properly maintained between the unwinding device 101 and the winding device 100.

[0014] A plurality of slitters 110 to 113 are provided in front of the front drum 103, and the paper taken up by the winding device 100 is taken up to the width of the product cut by the slitters.

[0015] The imaging device (first imaging device) 1a is positioned so as to capture an image of the side of the paper roll 107, which is a roll of paper 300 wound by the winding device 100. Preferably, the imaging devices 1a are positioned so that the entire side of the paper roll 107 falls within the imaging range of one imaging device 1a.

[0016] The imaging device (second imaging device) 1b is positioned so as to capture an image of the side of the feed roll 200, which is a roll of paper 300 set in the feed device 101. Preferably, the imaging devices 1b are positioned so that the entire side of the feed roll 200 falls within the imaging range of a single imaging device 1b. Note that the entire side of the paper web 107 may be captured in separate images using multiple imaging devices and then separately combined into a single image data, and the same may be done for capturing the image of the side of the feed roll 200. Alternatively, a single imaging device may be positioned so as to capture images of the side of the feed roll 200 and the side of the paper web 107.

[0017] The imaging devices 1a and 1b are communicatively connected to the operation monitoring device 10. The imaging device 1a sequentially captures images of the side surface of the paper roll 107, converts the images into image data, and outputs the image data to the operation monitoring device 10. The imaging device 1b converts an image of the side surface of the delivery roll 200 in its initial state when the delivery roll 200 is set in the delivery device 101 into image data, and outputs the image data to the operation monitoring device 10.

[0018] The operation monitoring device 10 sequentially measures the shape of the outer peripheral profile (first profile) of the side surface of the paper web roll 107 based on image data acquired and generated by the imaging device 1a, and calculates the roundness in real time.The operation monitoring device 10 measures the shape of the outer peripheral profile (second profile) of the initial side surface of the delivery roll 200 based on image data acquired and generated by the imaging device 1b, and calculates the axial deflection.

[0019] The control device 9 is communicatively connected to the operation monitoring device 10. The control device 9 is communicatively connected to the winder system 108, generates control signals in accordance with a control program set in the control device 9, and controls the driving of the electric motor of the winder system 108. The operation monitoring device 10 is communicatively connected to the control device 9, and collects the control signals from the control device 9.

[0020] The operation monitoring device 10 can time-synchronize the data on the deflection of the delivery roll 200, the roundness data calculated in real time, the image data, and the control signal, and store them as time-series data.

[0021] The operation monitoring device 10 can be provided with a means for generating a compensation signal for the control signal based on the correlation between deflection, roundness, and the control signal. The operation monitoring device 10 provided with the compensation signal generation means acquires the deflection, roundness, and control signal in real time, generates a compensation signal to suppress deterioration of roundness, and outputs the compensated control signal to the control device 9. The control device 9 controls the winder system 108 using the compensated control signal.

[0022] The configuration of the operation monitoring device 10 will be described. FIG. 2 is a schematic block diagram illustrating an operation monitoring device according to an embodiment. As shown in FIG. 2, the operation monitoring device 10 according to the embodiment includes an image processing unit 5, a calculation unit 6, and a storage unit 7.

[0023] The image processing unit 5 is connected to the imaging devices 1a and 1b via the communication unit 2. The image processing unit 5 acquires image data of the side surface of the paper web roll 107 from the imaging device 1a. The image processing unit 5 extracts the contour of the outer periphery of the side surface of the paper web roll 107 by image processing the acquired image data, and outputs the extracted result together with the coordinate data of the center to the calculation unit 6.

[0024] The image processing unit 5 acquires image data of the side surface of the delivery roll 200 from the imaging device 1b. The image processing unit 5 extracts the contour of the outer periphery of the side surface of the delivery roll 200 by image processing the acquired image data, and outputs the extracted result together with the coordinate data of the center to the calculation unit 6.

[0025] In the case of image data of the side surface of the paper roll 107, the boundary of the outer periphery of the side surface of the core 201 installed in the winding device 100 is extracted, and the coordinate data of the center is set based on the extracted outer periphery. In the case of image data of the side surface of the delivery roll 200, the boundary of the outer periphery of the side surface of the spool 202 is extracted, and the coordinate data is set based on the extracted outer periphery.

[0026] The calculation unit 6 calculates the radius of the contour of the outer periphery of the side surface based on the coordinate data of the outer periphery and center of the side surface of the paper roll 107. The calculation unit 6 performs the radius calculation multiple times around the outer periphery. The calculation unit 6 calculates the minimum and maximum radii of the radii around the outer periphery. The calculation unit 6 calculates the ratio between the minimum and maximum radii to calculate the circularity. Each time the calculation unit 6 calculates the circularity, it associates the calculated result with the acquisition time of the image data, converts it into time-series data, and outputs it to the memory unit 7.

[0027] The calculation unit 6 calculates the length from the center coordinate to the vertical contour of the outer periphery based on the data of the coordinates of the center and the contour of the outer periphery of the side surface of the delivery roll 200. If there is deflection in the axial direction of the delivery roll 200, the length to the vertical contour of the outer periphery is extracted twice. Therefore, the calculation unit 6 calculates the difference between these doubly extracted contours and outputs the result to the storage unit 7.

[0028] FIG. 3 is a schematic diagram illustrating a captured image of the side surface of the paper roll. In Figure 3, the solid line P1 represents the contour of the outer periphery of a perfect circle. The dashed line P2 represents the contour when the circularity is less than 1. The X-axis and Y-axis are arbitrary coordinate axes. For example, the X-axis and Y-axis are set to be orthogonal to each other and perpendicular to the rotation axis that is the center of rotation of the core 201 and the paper web 107.

[0029] The center coordinates (first coordinates) (X0, Y0) are set based on the data of the outer contour of the core 201. For example, the rotation axis that is the center of rotation of the core 201 and the paper web 107 passes through the center coordinates (X0, Y0).

[0030] As shown in FIG. 3, the calculation unit 6 divides the outer contour into n equal parts, sets arbitrary coordinates (Xm, Ym) on the contour, and measures the length from the center coordinates (X0, Y0). The calculation unit 6 varies m from 1 to n to measure the length from the center coordinates (X0, Y0). Of the measured lengths, the calculation unit 6 determines the minimum value as the minimum radius RMIN and the maximum value as the maximum radius RMAX. The roundness TC is defined as RMIN / RMAX. The calculation unit 6 calculates RMIN / RMAX and outputs the calculated roundness TC.

[0031] The image processing unit 5 continuously acquires images of the side surface of the paper roll 107, converts them into image data one by one, and outputs the images. The calculation unit 6 associates the calculation results of the roundness TC with the acquisition time of the image data to generate time-series data (first time-series data), and outputs the data to the storage unit 7. The image processing unit 5 may also output the image data from which the roundness TC has been calculated to the storage unit 7, in association with the acquisition time of the image data.

[0032] FIG. 4 is a schematic diagram illustrating a captured image of the side surface of the delivery roll. Fig. 4 shows an example of an image taken when deflection occurs in the axial direction of the delivery roll 200. P3 in Fig. 4 represents the contour (second contour) of the outer periphery of the side surface of the end portion in the axial direction of the delivery roll 200. P4 represents the contour (third contour) of the central portion in the axial direction of the delivery roll 200 as seen from the side. In other words, the fact that contour P4 is visible in the image taken from the side indicates that the delivery roll 200 is deflected in the axial direction.

[0033] For detecting the amount of deflection in the axial direction of the delivery roll 200, the center coordinates (second coordinates) (X0', Y0') are set in advance. The calculation unit 6 measures the length from the center coordinates (X0', Y0') along the Y axis to the coordinate of the outer periphery P3 in the negative direction of the Y axis. The calculation unit 6 measures the length from the center (X0', Y0') along the Y axis to the coordinate of the outline P4 in the negative direction of the Y axis. The calculation unit 6 calculates the difference between these lengths and outputs the amount of deflection. In this example, the Y axis is parallel to the direction of gravity, and the direction opposite to the direction of gravity is considered positive.

[0034] The amount of deflection is calculated in the initial state when the delivery roll 200 is set in the delivery device 101, and the calculation result of the amount of deflection is output to the storage unit 7, for example, in association with the product identification number of the delivery roll 200. The calculation result of the roundness TC is also associated with the product identification number of the delivery roll 200.

[0035] Returning to Figure 2, we continue the explanation. The calculation unit 6 collects control signals for the winder system 108 in time series from the control device 9 via the communication unit 8. The control signals include a speed command and an actual speed value of the electric motor that drives the spool 202 of the let-off device 101 together with the let-off roll 200. The control signals also include a speed command and an actual speed value (second time series data, third time series data) of the electric motor that drives the rear drum 102 and front drum 103 of the winding device 100.

[0036] The calculation unit 6 reads, for example, data on the amount of deflection, time-series data on the roundness, and time-series data on the control signal for each product identification number of the delivery roll 200. The calculation unit 6 time-synchronizes the time-series data on the roundness and the time-series data on the control signal, associates them with the product identification number and data on the amount of deflection of the delivery roll 200, and stores them in the storage unit 7.

[0037] The operator of the operation monitoring device 10 appropriately reads out the time-series data of roundness and the time-series data of the control signal, which are time-synchronized for each product number and its deflection amount, stored in the memory unit 7, examines the correlation between the roundness and the control signal, and derives the fluctuation of the control signal that causes the roundness to fluctuate and decrease. Based on the derived relationship, the operator derives a compensation function for the control signal and sets it in the calculation unit 6.

[0038] The compensation function is set based on the collected data so as to suppress fluctuations in the control signal that reduce the roundness, and is set so that when the amount of deflection is greater than a predetermined threshold, the compensation function is multiplied by a predetermined coefficient.

[0039] The calculation unit 6, to which the compensation function has been set, sequentially calculates the roundness TC based on the image data acquired from the image processing unit 5, and applies the compensation function to the calculated value of roundness TC. The calculation unit 6 generates a compensation value corresponding to the value of roundness TC, applies the compensation value to generate a compensated control signal, and outputs the compensated control signal to the control device 9. The control device 9 controls the winder system 108 using the compensated control signal. As a result, the winder system 108 continues the winding operation while suppressing the deterioration of roundness TC.

[0040] The operation of the operation monitoring device 10 according to the embodiment will be described. In the operation monitoring device 10, the calculation unit 6 has a data collection mode and a compensation output control mode. In the data collection mode, the calculation unit 6 sequentially calculates the roundness TC for continuously acquired image data and stores the calculated value in the memory unit 7 in time synchronization with the control signal collected from the control device 9. In the compensation output control mode, the control signal is compensated using a compensation function set based on the time-synchronized roundness TC and time-series data of the control signal stored in the data collection mode, and output to the control device 9. In the compensation output control mode, the control device 9 compensates in real time the control signal data acquired from the winder system to improve the roundness TC of the side shape of the paper web roll 107.

[0041] The operation of the data collection mode will now be described. The imaging device 1b generates image data of the side surface of the delivery roll 200 in the initial state and outputs the image data to the operation monitoring device 10.

[0042] The imaging device 1 a sequentially generates image data of the side surface of the paper roll 107 and outputs the image data to the operation monitoring device 10 .

[0043] The operation monitoring device 10 acquires image data from the imaging devices 1a and 1b, and the image processing unit 5 extracts the contour of the outer periphery of the side image and sets the coordinates of the center.

[0044] The operation monitoring device 10 uses the calculation unit 6 to calculate the roundness TC based on the coordinate data of the center and the contour of the outer periphery of the side surface of the paper roll 107, and generates time-series data of the roundness TC (first time-series data). The calculation unit 6 associates the time-series data of the roundness TC with the product identification number and stores it in the memory unit 7.

[0045] The operation monitoring device 10 uses the calculation unit 6 to calculate the initial amount of deflection based on the coordinate data of the center and the contour of the outer periphery of the side surface of the delivery roll 200. The calculation unit 6 associates the calculation result of the amount of deflection with the product identification number and stores it in the memory unit 7.

[0046] The operation monitoring device 10 uses the calculation unit 6 to collect control signals from the control device 9, time-synchronizes the time series data of roundness TC stored in the memory unit 7 with the time series data of the control signal (second time series data, third time series data), associates it with the product identification number, and stores it in the memory unit 7 together with the deflection amount data.

[0047] Desired data can be extracted from the data stored in the storage unit 7, for example, by specifying a product identification number. If attribute data such as the material of the product is associated with the product identification number, desired data can be extracted by specifying the attribute data. Furthermore, since the time series data stored in the storage unit 7 is associated with the acquisition time of the image data, desired data can also be extracted by specifying a time range.

[0048] The operator of the operation monitoring device 10 can extract desired data and derive a compensation function representing the relationship between the extracted roundness TC and time-series data of the control signal. For example, if the speed difference between the actual speed of the motor of the winding device 100 (second time-series data) and the actual speed of the motor of the unwinding device 101 (third time-series data) is smaller than the target value, the tension of the paper 300 between the winding device 100 and the unwinding device 101 will decrease. Once this tension decrease occurs, uneven winding will occur, resulting in a decrease in roundness. For example, even if the tension temporarily increases, uneven winding will occur, resulting in a decrease in roundness.

[0049] For example, based on the extracted time-series data of the control signal representing the roundness TC and the actual speed, the actual speed or the speed reference is compensated from the relationship between the roundness TC and the speed difference to suppress a decrease in roundness. For example, if the roundness TC falls below a predetermined value, the calculation unit 6 compensates the actual speed or the speed reference so as to increase the actual speed of the motor on the winding device 100 side. Alternatively, if the roundness TC falls below a predetermined value, the calculation unit 6 compensates the actual speed or the speed reference so as to decrease the actual speed on the unwinding device 101 side. Whether roundness decreases when tension decreases or when tension increases depends on the attributes of the paper, such as the material of the paper. Therefore, the direction of compensation for the actual speed, etc., is determined in advance based on the attributes of the paper to be wound.

[0050] The operation of the compensation output control mode will now be described. As in the data collection mode, the imaging devices 1a and 1b collect image data of the side surfaces of the delivery roll 200 and the paper web 107. The image processing unit 5 processes the acquired image data, sequentially calculates the roundness TC of the side surface shape of the paper web 107 in real time, and outputs the calculated value to the calculation unit 6. The image processing unit 5 calculates the amount of axial deflection of the delivery roll 200 in the initial state, and outputs the calculated value to the calculation unit 6.

[0051] The calculation unit 6, in which the compensation function has been set, applies the roundness TC to the compensation function to generate a compensation signal corresponding to the roundness TC. The calculation unit 6 sequentially acquires control signals from the control device 9 in real time, adds the compensation signal to the value of the acquired control signal, and outputs the result to the control device 9.

[0052] The control device 9 controls the winder system 108 according to the control signal compensated by the compensation signal.

[0053] For example, a threshold value for the amount of deflection in the axial direction of the delivery roll 200 is preset in the calculation unit 6 in which the compensation function is set. When the acquired calculated value of the amount of deflection of the delivery roll 200 exceeds the threshold value, the calculation unit 6 further compensates the compensation signal output by the compensation function. For example, the calculation unit 6 multiplies the compensation signal by a preset positive coefficient, adds the result to the value of the control signal, and outputs the result to the control device 9.

[0054] The control device 9 controls the winder system 108 in accordance with a control signal based on a compensation signal that has been compensated for the amount of deflection.

[0055] Incidentally, even in the compensation output control mode, the calculation unit 6 may associate time-series data of roundness based on successively acquired image data with the product identification number and store it in the storage unit 7. To enable time synchronization with the time-series data of roundness, the control signal, together with the value of the compensation signal, may also be stored in the storage unit 7 in association with the product identification number.

[0056] The effects of the operation monitoring device 10 according to the embodiment will be described. The operation monitoring device 10 according to the embodiment includes an image processing unit 5, which processes image data of the side surface of the paper roll 107, and the calculation unit 6 can accurately measure the roundness TC of the side surface shape of the paper roll 107. The imaging device 1a continuously outputs image data sequentially, so the calculation unit 6 can store the roundness TC data in the memory unit 7 as time-series data, and store it in the memory unit 7 in time synchronization with the time-series data of the control signal collected simultaneously with the image data.

[0057] The time-series data stored in the memory unit 7 is associated with the product identification number and the acquisition time of the image data, so by setting these as search parameters, it is possible to extract time-synchronized time-series data of the roundness TC and the control signal under desired conditions. The operator of the operation monitoring device 10 can derive the relationship between the roundness TC and the control signal from the time-series data extracted under desired conditions, and derive a compensation function having a compensation signal that compensates for the control signal so as to suppress a decrease in roundness TC.

[0058] In the operation monitoring device 10 according to the embodiment, a compensation function having a compensation signal generated so as to suppress a decrease in roundness TC can be set in the calculation unit 6. This allows the operation monitoring device 10 to be applied to a feedback loop between the control device 9 and the winder system 108, generate a compensation signal so as to suppress a decrease in roundness TC, and add the generated compensation signal to a control signal acquired in real time from the control device 9, thereby suppressing a decrease in roundness TC in real time.

[0059] When deriving a compensation function having a compensation signal based on the roundness TC extracted based on the attribute data of the product and the time-series data of the control signal, it is possible to derive an appropriate compensation function for each material of the product, for example. By applying the corresponding compensation function to each product to be wound by the winder system 108, it is possible to more appropriately compensate the control signal and suppress the deterioration of the roundness TC.

[0060] In the data collection mode of the operation monitoring device 10, the control signals collected by the operation monitoring device 10 can include, for example, a take-up side speed actual signal indicating the actual speed of the motor that drives the take-up device 100, and a let-off side speed actual signal indicating the actual speed of the motor that drives the let-off device 101. From these time-series data, it is possible to derive the relationship between the roundness TC and the difference between the take-up side speed actual signal and the let-off side speed actual signal, and to derive a compensation table that indicates a compensation function that serves as a compensation signal for the take-up side speed actual signal or the let-off side speed actual signal, having a value that cancels out the difference depending on fluctuations in roundness TC. While the above describes a case where roundness decreases due to a decrease in tension in the paper being wound, the same operation can be performed to obtain the same effect when roundness decreases due to an increase in paper tension.

[0061] In this way, an operation monitoring device can be realized that assists in the formation of a highly round paper web roll.

[0062] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0063] 1a, 1b...imaging device, 2a, 2b, 8...communication unit, 3...display unit, 5...image processing unit, 6...arithmetic unit, 7...storage unit, 9...control unit, 10...operation monitoring device, 100...winding device, 101...feed-out device, 102...rear drum, 103...front drum, 104, 105...guide roll, 106...rider roll, 107...paper roll, 108...winder system, 110-113...slitter, 200...feed-out roll, 201...core, 202...spool, 300...paper

Claims

1. an image processing unit that processes first image data of the side surface of the paper roll being wound by the winding device, the first image data being continuously acquired by the first imaging device, to extract a first contour of the outer periphery of the side surface of the paper roll; a calculation unit that sequentially calculates the circularity of the first contour based on the first contour and first coordinates of a center calculated based on the contour of a core that winds paper at the center of the paper roll; a storage unit that stores data on the circularity of the first contour as first time-series data; Equipped with the calculation unit has a data collection mode and a compensation output control mode, In the data collection mode, The calculation unit collecting second time series data of a first actual speed value of a first motor that drives the winding device and third time series data of a second actual speed value of a second motor that drives a delivery device that delivers paper to the winding device from a control device that controls the first motor and the second motor; storing the first time series data, the second time series data, and the third time series data in the storage unit in a time-synchronized manner; In the compensation output control mode, the operation monitoring device sets in the calculation unit a compensation function having a compensation signal having a value that is set to suppress fluctuations in the value of the first time series data based on the relationship between the first time series data and the difference between the second time series data and the third time series data, and the calculation unit continuously collects the first time series data, the second time series data, and the third time series data, and compensates the first speed actual value or the second speed actual value based on the compensation function so as to suppress fluctuations in the value of the first time series data, and outputs the compensated value to the control device.

2. the image processing unit performs image processing on second image data acquired by a second imaging device, the second image data being of a side surface of the feed roll in an initial state when installed in the feed device, and extracts a second contour and a third contour of an outer periphery of the side surface of the feed roll; In the data collection mode, the calculation unit calculating an axial deflection of the delivery roll based on the coordinates of the center of the delivery device, the coordinates of the second contour, and the coordinates of the third contour; 2. The operation monitoring device according to claim 1, wherein the deflection amount, the first time series data, the second time series data, and the third time series data are stored in the storage unit along with a product identification number that identifies the delivery roll.

3. 3. The operation monitoring device according to claim 2, wherein the calculation unit has a threshold value for the amount of deflection, and in the compensation output control mode, when the amount of deflection is greater than the threshold value, multiplies the value of the compensation signal by a predetermined constant.

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