Information providing apparatus, information providing method, and information providing program

Abstract

To uniform the thickness of paper with high accuracy in the papermaking process.SOLUTION: An information providing device 10 of the embodiment of the present invention has an acquisition section 141, a calculation section 142, and a provision section 143. Based on the provided index, the acquisition section 141 acquires a measured value of the thickness of each part of the paper and a measured value of the moisture percentage of each part of the paper before or after a pressurizing step in which each part of the paper is pressurized by different pressing by using a roll. A calculation section 142 calculates an estimated value of the thickness of the paper after the moisture percentage of the paper changes based on the measured value of the thickness and the measured value of the moisture percentage. The provision section 143 provides the estimated value as an index to the device that executes the pressurization process.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an information providing device, an information providing method, and an information providing program. [Background technology]

[0002] Conventionally, there are known techniques for making the thickness of a paper web (sheet-shaped paper) uniform in the papermaking process. For example, Patent Document 2 describes a technique for adjusting the linear pressure in the width direction in the press part based on a measured thickness profile of the paper web. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-27396 A [Patent Document 2] JP 2004-277899 A [Patent Document 3] JP 2013-108859 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, with conventional techniques, it is sometimes impossible to achieve a uniform thickness of paper with a high degree of accuracy during the papermaking process.

[0005] For example, the thickness of paper changes depending on the change in the moisture content of the paper. The moisture content of paper changes in processes after the thickness adjustment process or after production. However, conventional techniques do not fully take into account the change in paper thickness due to the change in moisture content.

[0006] One aspect of the present invention is to achieve a uniform thickness of paper with high accuracy during the papermaking process. [Means for solving the problem]

[0007] According to one aspect, the information providing device has an acquisition unit that acquires, based on a provided indicator, measured values ​​of the thickness of each portion of the paper and measured values ​​of the moisture content of each portion of the paper before or after a pressurizing process in which each portion of the paper is pressed with different pressures using a roll; a calculation unit that calculates, based on the measured thickness and moisture content, an estimated value of the thickness of the paper after the moisture content of the paper has changed; and a providing unit that provides the estimated value as the indicator to a device that performs the pressurizing process.

[0008] In one aspect of the information providing method, a computer performs a process in which, based on a provided indicator, a measured value of the thickness of each part of the paper and a measured value of the moisture content of each part of the paper are obtained before or after a pressurizing process in which a roll is used to pressurize each part of the paper with different pressures, and an estimate of the thickness of the paper after the moisture content of the paper has changed is calculated based on the measured thickness and moisture content, and the estimated value is provided as the indicator to a device performing the pressurizing process.

[0009] An information providing program according to one aspect causes a computer to perform a process of obtaining, based on a provided indicator, measured values ​​of the thickness and moisture content of each part of the paper before or after a pressurizing process in which a roll is used to pressurize each part of the paper with different pressures, calculating, based on the measured thickness and moisture content, an estimated value of the thickness of the paper after the moisture content of the paper has changed, and providing the estimated value as the indicator to a device performing the pressurizing process. Effect of the Invention

[0010] According to an embodiment of the present invention, the thickness of paper can be made uniform with high precision during the papermaking process. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of an adjustment system according to an embodiment. [Diagram 2] FIG. 2 is a diagram illustrating an example of the configuration of an information providing device according to the embodiment. [Diagram 3] FIG. 3 is a diagram illustrating the composite thickness profile. [Figure 4] FIG. 4 is a flowchart showing a flow of processing performed by the information providing device according to the embodiment. [Diagram 5] FIG. 5 is a diagram illustrating an example of a hardware configuration. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, embodiments of the information providing device, the information providing method, and the information providing program disclosed in the present application will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments described here. Also, the same elements are given the same reference numerals, and duplicated descriptions are omitted as appropriate. Also, each embodiment can be appropriately combined within a range that does not cause contradictions.

[0013] The configuration of a coordination system including an information providing device will be described with reference to Fig. 1. The coordination system includes at least a part of a paper production line and the information providing device.

[0014] As shown in Fig. 1, the adjustment system 1 includes an information providing device 10, a film thickness control device 20, a measuring device 30, and a winding device 40. Note that the solid arrows in Fig. 1 indicate the flow of the paper being manufactured, and the dashed arrows indicate the flow of data or signals.

[0015] The paper manufacturing line includes a wire part, a press part, a dry part, a calendar part, a winding process, etc. Paper from which moisture has been removed to a certain extent is supplied to the calendar part. In the calendar part, the supplied paper is pressed with a roll to give it a glossy finish. The film thickness control device 20 and the winding device 40 may be part of a papermaking machine.

[0016] The film thickness control device 20 performs the processing of the calendar part. That is, the film thickness control device 20 adjusts the paper thickness by controlling the pressing pressure. The film thickness control device 20 changes the pressing pressure for each position in the width direction of the paper (a direction perpendicular to the paper transport direction and parallel to the paper). For example, the film thickness control device 20 may change the pressing pressure by locally heating the calendar roll to change the roll diameter, or may change the pressing pressure by a number of actuators arranged inside the elastically deforming roll.

[0017] The measuring device 30 measures the distribution of paper thickness in the width direction (thickness profile) and the distribution of moisture content in the width direction (moisture content profile) of the paper whose thickness has been adjusted by the calendar part. The measuring device 30 is equipped with a sensor that scans the paper in the width direction. The sensor measures the thickness and moisture content.

[0018] The information providing device 10 calculates an index for adjusting the paper thickness based on the thickness profile and the moisture content profile. The information providing device 10 provides the calculated index to the film thickness control device 20.

[0019] For example, the index is an estimated value of the thickness of each part in the width direction of the paper, taking into account the moisture content. The paper thickness measured by the measuring device 30 is likely to change further depending on the change in moisture content in the subsequent process. For this reason, even if the paper thickness is uniform immediately after the calendar part, the final paper thickness is not necessarily uniform.

[0020] Therefore, the film thickness control device 20 adjusts the paper thickness based on an index calculated by considering the paper thickness and moisture content, rather than the actual measured value of the paper thickness. This makes it possible to make the thickness of the final paper more uniform with higher accuracy. The specific method of calculating the index will be described later.

[0021] The configuration of the information providing device 10 will be described with reference to Fig. 2. Fig. 2 is a diagram showing an example of the configuration of the information providing device according to the embodiment. As shown in Fig. 2, the information providing device 10 includes an input unit 11, an output unit 12, a storage unit 13, and a control unit 14.

[0022] The input unit 11 is an interface for inputting data. The input unit 11 accepts input of data from the measurement device 30. The output unit 12 is an interface for outputting data. The output unit 12 outputs data to the film thickness control device 20.

[0023] The storage unit 13 stores various data and various programs executed by the control unit 14. For example, the storage unit 13 is a storage device such as a memory or a hard disk. The storage unit 13 stores various data generated in the processing executed by the information providing device 10, such as data obtained in the process of the control unit 14 executing various processes and processing results obtained by executing the various processes. The storage unit 13 stores coefficient information 131. The coefficient information 131 is the value of a coefficient used in calculating an index.

[0024] The control unit 14 is a processing unit that controls the entire information providing device 10. The control unit 14 includes an acquisition unit 141, a calculation unit 142, and a providing unit 143.

[0025] The acquisition unit 141 acquires the thickness profile and the moisture content profile from the measurement device 30.

[0026] The calculation unit 142 calculates an index based on the thickness profile and the moisture content profile. The calculation unit 142 calculates a composite thickness profile as an index. The composite thickness profile is an estimate of the bone dry paper thickness or the air dry paper thickness.

[0027] The bone-dry thickness is the thickness of paper when the paper is completely dry after production (moisture content 0%). The air-dry thickness is the thickness of paper when the parts of the paper with high moisture content have naturally dried after production and the moisture content has become uniform.

[0028] 3 is a diagram for explaining a composite thickness profile. The x-axis represents the position in the width direction of the paper. The y-axis represents the thickness of the paper. A curve 501 represents the thickness of the paper.

[0029] The value of x indicates the position of the paper in the width direction of the paper. The thickness profile acquired by the acquisition unit 141 is the thickness of the paper corresponding to each value of x. The moisture content profile acquired by the acquisition unit 141 is the moisture content of the paper corresponding to each value of x.

[0030] For example, the thickness profile has x=x 1 The thickness measurement at the position is CLP 1 For example, the thickness profile has x = x 2 The thickness measurement at the position is CLP 2 It is also shown that CLP AVE is the average thickness measurement at each location.

[0031] Although not shown in FIG. 3, the moisture profile shows the measured moisture content at each location. For example, the moisture profile shows the moisture content at each location at x=x 1 The measured moisture content at the position of MP 1 For example, the moisture content profile shows that x = x 2 The measured moisture content at the position of MP 2 It is shown that.

[0032] For example, the calculation unit 142 calculates the composite thickness profile (body-dry paper thickness or air-dry paper thickness) at each position in the width direction of the paper by at least one of the following equations (1) to (7), where CLP and MP are the measured values ​​of the thickness and moisture content at each position.

[0033] α and β are predetermined conversion coefficients and take positive values. α and β are included in the coefficient information 131. ΔMP is a preset fixed value of moisture content or an average value of the measured values ​​of moisture content at each position (MP AVE ) and the measured moisture content MP. The function f(z) represents the change in film thickness relative to moisture content z. For example, the paper thickness when the moisture content is z is the bone dry paper thickness + f(z).

[0034] As shown in equation (1), the calculation unit 142 can calculate the bone dry paper thickness by subtracting the product of the conversion coefficient α and the measured moisture content MP from the measured thickness value CLP. Absolutely dry paper thickness=CLP-α*MP (1)

[0035] As shown in equation (2), the calculation unit 142 can calculate the bone dry paper thickness by subtracting the product of the conversion coefficient β, the measured moisture content MP, and the measured thickness CLP from the measured thickness CLP. Absolute dry paper thickness=CLP-β*MP*CLP (2)

[0036] As shown in formula (3), the calculation unit 142 calculates the conversion coefficient β, the measured moisture content MP, and the average thickness measurement value CLP from the measured thickness value CLP. AVE The bone dry paper thickness can be calculated by multiplying and subtracting the result. Absolutely dry paper thickness=CLP-β*MP*CLP AVE (3)

[0037] The calculation unit 142 can calculate the air-dry paper thickness by subtracting the product of the conversion coefficient α and ΔMP from the measured thickness value CLP, as shown in equation (4). Air-dried paper thickness=CLP-α*(ΔMP) (4)

[0038] As shown in equation (5), the calculation unit 142 can calculate the air-dry paper thickness by subtracting the product of the conversion coefficients β and ΔMP and the measured thickness value CLP from the measured thickness value CLP. Air-dried paper thickness=CLP-β*(ΔMP)*CLP (5)

[0039] As shown in equation (6), the calculation unit 142 calculates the conversion coefficient β, ΔMP, and the average value CLP of the thickness measurements from the thickness measurements CLP. AVE The air-dry paper thickness can be calculated by multiplying and subtracting the result. Air-dried paper thickness=CLP-β*(ΔMP)*CLP AVE (6)

[0040] As shown in equation (7), the calculation unit 142 can calculate the air-dry paper thickness by subtracting the difference between the film thickness change when the moisture content is the measured value MP and the film thickness change when the moisture content is the air-dry moisture content (e.g., 6%) from the thickness measurement value CLP. The air-dry moisture content is set in advance. Air-dried paper thickness = CLP-{f(MP)-f(air-dried moisture content)} (7)

[0041] Equations (2), (3), (5), and (6) show that the change in paper thickness due to a change in moisture content is not only due to the moisture content but also to the paper thickness itself (CLP or CLP AVE This formula takes into account that the conversion coefficient is also proportional to the thickness of the paper. This makes it easier to manage paper brands because the conversion coefficient can be kept within a certain range even for brands with different thicknesses.

[0042] In addition, in equations (2) and (5), the conversion coefficient is multiplied by the measured thickness at each position. On the other hand, since the unevenness of the paper thickness can be considered to be sufficiently small compared to the correction amount, the CLP multiplied by the conversion coefficient, as in equations (3) and (6), is the average CLP AVE The values ​​multiplied by the conversion coefficients may be replaced by CLP and CLP AVE However, any amount proportional to the amount of swelling of the paper, such as basis weight, bone dry basis weight, etc., may be used. When basis weight is used as the value to be multiplied by the conversion coefficient, moisture content x basis weight means the amount of moisture present in the paper.

[0043] The measuring device 30 may directly measure and output the amount of moisture contained in the paper instead of the moisture percentage. The information providing device 10 can calculate the composite thickness profile using the moisture content instead of the moisture percentage. In this case, equations (1) and (4) function effectively by replacing the moisture percentage with the moisture content. Furthermore, in this case, there is an advantage that the conversion coefficients for brands of paper with different thicknesses can be kept within a certain range without multiplying by thickness or basis weight as in equations (2), (3), (5), and (6), making brand management easier.

[0044] For example, the calculation unit 142 can calculate the bone dry paper thickness by equation (8) in which the moisture content MP in equation (1) is replaced with the moisture content MW. Absolute dry paper thickness=CLP-α*MW (8)

[0045] Also, for example, the calculation unit 142 can calculate the air-dried paper thickness by equation (9) in which ΔMP in equation (4) is replaced with ΔMW. Here, ΔMW is a fixed value of moisture content set in advance or an average value of the moisture content measured at each position (MW AVE ) and the measured moisture content MW. Air-dried paper thickness=CLP-α*(ΔMW) (9)

[0046] Furthermore, the measuring device 30 can measure the basis weight. In this case, the acquiring unit 141 further acquires the distribution of the basis weight of each portion of the paper, i.e., the basis weight profile, from the measuring device 30. In this case, the calculating unit 142 calculates a composite profile using the basis weight profile.

[0047] For example, the calculation unit 142 can calculate the bone dry paper thickness using equation (10) or (11) in which CLP in the second term on the right side of equations (2) and (3) is replaced with the measured basis weight BW. Absolute dry paper thickness=CLP-β*MP*BW (10) Absolutely dry paper thickness=CLP-β*MP*BW AVE (11)

[0048] In addition, for example, the calculation unit 142 calculates the CLP AVE The average value of the basis weight measurements, BW AVE The air-dry paper thickness can be calculated by using equation (12) or equation (13) replacing Air-dried paper thickness=CLP-β*(ΔMP)*BW (12) Air-dried paper thickness=CLP-β*(ΔMP)*BW AVE (13)

[0049] The providing unit 143 provides the synthetic paper thickness to the film thickness control device 20. That is, the providing unit 143 feeds back the synthetic thickness profile to the film thickness control device 20 based on the thickness profile and moisture content profile obtained as a result of processing the calendar part by the film thickness control device 20. In this way, the adjustment system 1 realizes feedback control.

[0050] The film thickness control device 20 controls the thickness of the paper in the width direction of the paper based on the composite thickness profile. This keeps the thickness of the paper, minus the effect of moisture, uniform even when the paper dries after papermaking, which is expected to improve the quality of the paper.

[0051] For example, when α=0.8, the information providing device 10 calculates a composite thickness profile using equation (4) for a paper thickness (CLP) of 60 um, and it is assumed that the thickness change due to the moisture content change can be corrected. In this case, it is considered that the thickness change due to the moisture content change can be similarly corrected by the information providing device 10 calculating the composite thickness profile using equation (5) or (6) with β=α / 60=0.8 / 60=0.0133. In this way, when brands with different film thicknesses are produced, the information providing device 10 makes it possible to use a value close to the conversion coefficient that has already been successfully corrected as the conversion coefficient.

[0052] The flow of processing in the information providing device 10 will be described with reference to Fig. 4. Fig. 4 is a flowchart showing the flow of processing in the information providing device according to the embodiment.

[0053] 4, first, the information providing device 10 acquires a thickness profile and a moisture content profile from the measurement device 30 (step S101). Next, the information providing device 10 calculates a composite thickness profile from the thickness profile and the moisture content profile (step S102). Then, the information providing device 10 feeds back the composite thickness profile to the calendar part, i.e., the film thickness control device 20 (step S103).

[0054] The information providing device 10 can further improve the accuracy of the paper thickness adjustment by feedback control by repeatedly performing steps S101 to S103.

[0055] [effect] As described above, the information providing device 10 has an acquiring unit 141, a calculating unit 142, and a providing unit 143. The acquiring unit 141 acquires, based on the provided index, the measured thickness of each portion of the paper and the measured moisture content of each portion of the paper before or after the pressing step in which a roll is used to pressurize each portion of the paper with different pressures. The calculating unit 142 calculates an estimated value of the thickness of the paper after the moisture content of the paper has changed, based on the measured thickness values ​​and the measured moisture content values. The providing unit 143 provides the estimated value as an index to the device that executes the pressing step.

[0056] The pressing process, in which rolls are used to pressurize each part of the paper with different pressures based on the provided indicators, is the calender part, and is executed by the film thickness control device 20. Also, the measuring device 30 may measure the thickness and moisture content of the paper after the calender part as described above, or may measure the thickness and moisture content of the paper before the calender part. The estimated value of the paper thickness after the change in moisture content of the paper is the bone dry paper thickness or air dry paper thickness described in equations (1) to (7).

[0057] In this way, the information providing device 10 can calculate the index by taking into account not only the measured value of the paper thickness but also the measured value of the moisture content. This allows for more accurate adjustment of the paper thickness through feedback control. As a result, according to the embodiment, it is possible to make the thickness of the paper uniform with high accuracy during the papermaking process.

[0058] Here, if the paper thickness is uneven, the paper will not be transported properly during printing, which can lead to printing failures, uneven print quality, and loss of commercial value of the paper. According to the embodiment, such situations can be avoided.

[0059] In addition, the film thickness control device 20 adjusts the thickness of the paper in the width direction in the calendar part so that the air-dried paper thickness provided as an index becomes flat. This adjustment makes the thickness profile of the paper uniform when it is in an air-dried state.

[0060] In this way, according to the embodiment, even if the thickness of the paper after production varies partially, the paper thickness will eventually become flat by eliminating the unevenness in moisture content distribution after production. This reduces thickness unevenness caused by moisture absorption and release during storage of the paper after production, improving the quality of the paper product.

[0061] By making the thickness of the paper uniform after production, disadvantageous phenomena such as the occurrence of ink coating spots and non-uniform dimensions of the processed product can be avoided. Furthermore, according to the embodiment, the unevenness of the wound paper roll is eliminated, and quality defects such as wrinkles in the paper are eliminated. Furthermore, according to the embodiment, the unevenness of the paper roll is eliminated, and paper jams, machine instability, damage, etc., when the paper is loaded into the machine are reduced. Furthermore, according to the embodiment, the energy required to make the moisture content profile uniform is reduced, making it possible to contribute to resource conservation and environmental protection.

[0062] [Variations] The embodiment may be modified as follows.

[0063] For example, the location where the paper thickness control is performed in the adjustment system 1 may be other than the calendar part. Also, a process of adjusting the moisture content of the paper may be performed before the process of controlling the paper thickness, or the moisture content adjustment may be performed in the calendar part. In this way, if the moisture content is previously kept within a certain range by the moisture content adjustment, the information providing device 10 can calculate the bone dry paper thickness and the air dry paper thickness with high efficiency and high accuracy.

[0064] In addition, the calender part may simultaneously perform control to flatten the thickness and control to flatten the moisture content, which makes the adjustment amount in the control to flatten the thickness more constant, and therefore makes it easier to uniformly obtain the effect of smoothing the paper surface by the calender part.

[0065] In addition, in the control for flattening the moisture content profile, a certain amount of deviation from the target flatness may be tolerated. In this way, the effect of smoothing the paper surface by the calendar part can be maintained at a certain level, while the energy input to adjusting the moisture content profile can be reduced.

[0066] Furthermore, the control for flattening the paper thickness may be performed by adjusting the moisture content in the width direction while keeping the linear pressure of the roll for pressing in the calender part constant. In this case, the final paper thickness can be made flat while keeping the effect of the calender part for smoothing the paper surface constant.

[0067] The moisture content may also be adjusted so that it is not flat across the width of the paper, but is lower at the paper edges. If the moisture content is adjusted so that it is lower at the paper edges, the actual paper thickness required to flatten the air-dry film thickness profile will not be flat, but will be a profile with thinner edges. Paper with such a paper thickness distribution may be easier to expel air when wound, and the paper may meander less when wound, making it easier to handle.

[0068] The information providing device 10 may perform a calculation to limit the deviation from the measured film thickness within a certain range when calculating the air-dried paper thickness. Here, since the thickness when the paper is wound is close to the measured film thickness, if the correction amount is too large, the paper will be wound with a bias in the film thickness, which may cause wrinkles and prevent the paper from being wound properly. In contrast, if a limit is set on the correction amount, the wound shape will be stable, making it possible to avoid stopping operations due to winding failures and to continue operations.

[0069] [system] The information including the processing procedures, control procedures, specific names, various data and parameters shown in the above documents and drawings can be changed arbitrarily unless otherwise specified.

[0070] In addition, each component of each device shown in the figure is a functional concept, and does not necessarily have to be physically configured as shown in the figure. In other words, the specific form of distribution and integration of each device is not limited to that shown in the figure. In other words, all or part of them can be functionally or physically distributed and integrated in any unit depending on various loads, usage conditions, etc.

[0071] Furthermore, each processing function performed by each device may be realized, in whole or in part, by a CPU and a program analyzed and executed by the CPU, or may be realized as hardware using wired logic.

[0072] [Hardware] Next, a hardware configuration example of the information providing device 10 will be described. Fig. 5 is a diagram for explaining the hardware configuration example. As shown in Fig. 5, the information providing device 10 has a communication device 100a, a HDD (Hard Disk Drive) 100b, a memory 100c, and a processor 100d. Moreover, each unit shown in Fig. 5 is connected to each other by a bus or the like.

[0073] The communication device 100a is a network interface card or the like, and communicates with other servers. The HDD 100b stores a program and a DB for operating the functions shown in FIG.

[0074] The processor 100d reads out a program that executes the same processes as the respective processing units shown in Fig. 2 from the HDD 100b or the like and loads it in the memory 100c, thereby operating a process that executes each function described in Fig. 2 or the like. For example, this process executes a function similar to that of each processing unit of the information providing device 10. Specifically, the processor 100d executes a process that executes the same processes as the acquiring unit 141, the calculating unit 142, and the providing unit 143.

[0075] In this way, the information providing device 10 operates as an information providing device that executes an information providing method by reading and executing a program. The information providing device 10 can also realize functions similar to those of the above-mentioned embodiment by reading the program from a recording medium using a medium reading device and executing the read program. Note that the program in this other embodiment is not limited to being executed by the information providing device 10. For example, the present invention can be similarly applied to a case where another computer or server executes a program, or a case where these execute a program in cooperation with each other.

[0076] This program can be distributed via a network such as the Internet. This program can also be recorded on a computer-readable recording medium such as a hard disk, a flexible disk (FD), a CD-ROM, a magneto-optical disk (MO), or a digital versatile disk (DVD), and can be executed by being read out from the recording medium by a computer. [Explanation of symbols]

[0077] 10 Information provision device 11 Input section 12 Output section 13 Storage section 14 Control section 20 Film thickness control device 30 Measuring Equipment 40 Winding device 131 Coefficient Information 141 Acquisition Department 142 Calculation section 143 Provision Department 501 curve

Claims

1. an acquisition unit that acquires a measurement value of the thickness of each portion of the paper and a measurement value of the moisture content of each portion of the paper before or after a pressing process in which each portion of the paper is pressed with a roll at a different pressure based on the provided indicator; a calculation unit that calculates an estimated thickness of the paper after the moisture content of the paper has changed based on the thickness measurement value and the moisture content measurement value; a providing unit that provides the estimated value as the index to a device that performs the pressurizing step; An information providing device having the above configuration.

2. The calculation unit calculates the index using the difference between the thickness measurement value and the moisture content measurement value of each portion of the paper and a preset fixed value of the moisture content or an average value of the moisture content measurement values.

2. The information providing device according to claim 1.

3. The calculation unit calculates the index by subtracting a value obtained by multiplying a coefficient, the measured moisture content, and the measured thickness from the measured thickness.

2. The information providing device according to claim 1.

4. The calculation unit calculates the index by subtracting a value obtained by multiplying a coefficient, the measured moisture content, and an average value of the measured thickness from the measured thickness.

2. The information providing device according to claim 1.

5. The calculation unit calculates the index by subtracting, from the measured thickness value, a value obtained by multiplying a difference between the measured moisture content and a preset fixed value of the moisture content or an average value of the measured moisture content values ​​by a coefficient.

2. The information providing device according to claim 1.

6. The calculation unit calculates the index by subtracting from the measured thickness value a value obtained by multiplying a difference between the measured moisture content and a preset fixed value of moisture content or an average value of the measured moisture content values ​​by a coefficient and the measured thickness value.

2. The information providing device according to claim 1.

7. The calculation unit calculates the index by subtracting from the thickness measurement value a value obtained by multiplying a difference between the moisture content measurement value and a preset fixed value of moisture content or an average value of the moisture content measurement values ​​by a coefficient and the average value of the thickness measurement values.

2. The information providing device according to claim 1.

8. The calculation unit calculates the index by subtracting, from the measured thickness, a difference between a film thickness change with respect to the measured moisture content and a film thickness change with respect to the air-dry moisture content.

2. The information providing device according to claim 1.

9. The acquisition unit further acquires a measurement of the basis weight of each portion of the paper; The calculation unit calculates the index by subtracting a value obtained by multiplying the coefficient, the measured moisture content, and the measured basis weight from the measured thickness.

2. The information providing device according to claim 1.

10. The acquisition unit further acquires a measurement of the basis weight of each portion of the paper; The calculation unit calculates the index by subtracting, from the measured thickness value, a value obtained by multiplying a difference between the measured moisture content and a preset fixed value of the moisture content or an average value of the measured moisture content values ​​by a coefficient and the measured basis weight.

2. The information providing device according to claim 1.

11. Based on the provided indicators, obtain a measurement of the thickness of each portion of the paper and a measurement of the moisture content of each portion of the paper before or after a pressing step in which the roll is used to press each portion of the paper with a different pressing force; calculating an estimate of the thickness of the paper after the moisture content of the paper has changed based on the thickness measurement and the moisture content measurement; The estimated value is provided as the index to a device that performs the pressurizing step. A method of providing information in which processing is performed by a computer.

12. Based on the provided indicators, obtain a measurement of the thickness of each portion of the paper and a measurement of the moisture content of each portion of the paper before or after a pressing step in which the roll is used to press each portion of the paper with a different pressing force; calculating an estimate of the thickness of the paper after the moisture content of the paper has changed based on the thickness measurement and the moisture content measurement; The estimated value is provided as the index to a device that performs the pressurizing step. An information providing program that causes a computer to execute processing.

Images