Method and system for monitoring the performance of a recoupling sheet in a roll portion

Abstract

The invention relates to a system (200) and a computer-implemented method for monitoring the performance of at least one rewinding shaft (120) in a web section (100) of a paper machine by detecting a unique identification code (ID) associated with the rewinding shaft (120) from a mark (130) on the rewinding shaft (120); identifying the rewinding shaft (120) based on the unique identification code ID; determining at least one rewinding shaft performance parameter of the identified rewinding shaft (120) based on measurements from the at least one sensor (160); and determining whether there is a failure in the identified performance of the rewinding shaft (120) based on whether the determined at least one rewinding shaft performance parameter satisfies a requirement indicative of a performance failure of the rewinding shaft (120). The invention also comprises a computer program having software for carrying out the method, a non-volatile data carrier and a paper machine comprising the system.

Description

Technical Field

[0001] The present invention relates to a method and system for monitoring the performance of at least one winding spool in a rewinding system of a portion of a paper machine, such as a reel section. If the winding spool is transferred to a subsequent machine, such as a winder, rewinder or converter, after the reel section, the monitoring of the performance of at least one winding spool similar to the invention presented herein can also be applied to the subsequent machine (continued to be applied to the subsequent machine).

[0002] The term paper machine includes machines for producing paper, board, tissue, nonwoven products, textiles or any other suitable web material. Background Art

[0003] A paper machine (or papermaking machine) is an industrial machine used in the pulp and paper industry for high-speed, high-volume continuous production of paper, paperboard, toilet paper, nonwoven products, textiles, etc. A paper machine has several different operating sections, which may generally include a forming section, a press section, a drying section, a size press section, a sheet transfer section, and a reel section. These operating sections may also include, for example, a coating section to modify surface properties using coatings.

[0004] The present disclosure relates to the reel section where the paper products leaving the sheet transfer section of the machine are rewound onto various rollers (mother rollers, master rollers) for further processing. In the reel section, a large cylinder (commonly referred to as a reel drum) or reel belt is used to rewind the paper products onto a rewinding shaft (e.g., a metal shaft, a reel shaft, a core shaft with core threads thereon, etc.). A constant nip pressure is maintained between the reel drum or reel belt and the rewinding shaft, allowing the friction generated to rotate the rewinding shaft. The paper product travels on top of the reel drum or along the reel belt and is rewound onto the core of the rewinding shaft to form a mother roll or master roll.

[0005] Removing, adjusting or maintaining a faulty or damaged rewinding spindle is important to avoid the rewinding spindle causing serious problems in the process, resulting in loss of production due to suboptimal rewinding requiring the operator to take time to remove the rewinding spindle and perform maintenance and / or time-consuming and expensive downtime due to the need to stop the process to identify and correct the problem.

[0006] Currently, the main method of ensuring timely removal, adjustment or maintenance of faulty or damaged rewinding shafts is to stop the operation of the reel section or remove the rewinding shaft from the reel section during operation when an operator notices a production problem to manually evaluate the components of the reel section, including the rewinding shaft, by visual inspection. If the operator concludes that there is a problem with the inspected rewinding shaft, the operator can initiate appropriate maintenance operations. Of course, such expensive process stops are undesirable. In addition, when the operator manually evaluates the rewinding shaft, there is a great risk of making mistakes and missing maintenance or replacement needs. There is also always a risk of injury to operators who manually interact with the paper machine.

[0007] To help the operator with the visual inspection, the rewinding shafts can be marked with various symbols and colors, for example on their brake drums, to distinguish them from one another. However, production must be stopped for each marking, identification and maintenance operation, which in turn results in huge costs and time losses.

[0008] There is a need for improved maintenance of reeling shafts in the reel section of a paper machine to reduce downtime, reduce the need for manual work and thus improve operator safety, improve maintenance accuracy and extend the service life of the reeling shaft, thereby improving reel section performance. Summary of the invention

[0009] The object of the present invention is to eliminate or at least reduce to a minimum the problems discussed above. This is achieved by a system and a method for monitoring the performance of at least one rewinding shaft 120 in a reel section (100) of a paper machine, a paper machine comprising the system, a computer program for executing the method and a non-volatile data carrier containing the computer program according to the attached independent claims.

[0010] As mentioned herein, because the operator manually evaluates the rewinding shaft in the reel section, the risk of making mistakes and missing maintenance or replacement requirements is very high. One source of error is that the operator evaluates at a certain time point without taking into account the change of the rewinding shaft over time. Therefore, the monitoring of the rewinding shaft in the reel section is greatly improved. Specifically, due to the reduced demand for manual labor and the downtime of the paper machine, the embodiments of this article reduce the time and cost of maintaining the rewinding shaft, the reel section and even the entire paper machine and paper mill. Advantageously, reducing or even eliminating manual monitoring and replacing manual monitoring with the automatic monitoring of the embodiments described herein further improves the accuracy of maintaining the rewinding shaft in the reel section, thereby further improving the entire production process of the paper machine and paper mill. Due to the reduction of manual processing and maintenance more accurately reducing downtime, the output of the resulting production process will be higher, which helps to maximize the use of the rewinding shaft and also improves the service life of other machine components that may be worn due to the faulty rewinding shaft.

[0011] In a first aspect of the present invention, a system for monitoring the performance of at least one rewinding shaft in a reel section of a paper machine is provided. The system comprises: at least one rewinding shaft, each rewinding shaft having a corresponding mark, the mark including information of a unique identification code ID associated with the rewinding shaft; at least one detector configured to detect the corresponding mark on each rewinding shaft, wherein the at least one detector is operably connected to the reel section and positioned along the rewinding cycle of the at least one rewinding shaft; at least one sensor configured to determine a parameter indicating the performance of the rewinding shaft; a memory; and a processing circuit communicatively connected to the at least one detector, the at least one sensor and the memory. For each of the at least one rewinding shaft, each of the at least one detector is configured to detect the unique identification code ID associated with the rewinding shaft from the corresponding mark on the rewinding shaft. The processing circuit is configured to, for each of the at least one rewinding shaft: identify the rewinding shaft based on the unique identification code ID; determine at least one rewinding shaft performance parameter of the identified rewinding shaft based on measurements from one or more of the at least one sensor; and determine whether the performance of the identified rewinding shaft has a fault based on whether the determined at least one rewinding shaft performance parameter meets the requirements indicating a performance fault of the rewinding shaft.

[0012] In a second aspect of the invention, there is provided a computer-implemented method for monitoring the performance of at least one rewinding shaft in a reel section of a paper machine, the reel section being operably connected to at least one detector, the at least one detector being configured to detect a corresponding mark on each rewinding shaft, the at least one detector being positioned along a rewinding cycle of the at least one rewinding shaft. The method comprises, for each rewinding shaft: using at least one of the at least one detector to detect a unique identification code ID associated with the rewinding shaft from the mark on the rewinding shaft; using a processing circuit communicatively connected to the detector to identify the rewinding shaft based on the unique identification code ID; using the processing circuit to determine at least one rewinding shaft performance parameter of the identified rewinding shaft based on measurements from at least one sensor; and using the processing circuit to determine whether the performance of the identified rewinding shaft is faulty based on whether the determined at least one rewinding shaft performance parameter satisfies requirements indicating a performance fault of the rewinding shaft.

[0013] The invention also comprises a papermaking machine comprising a monitoring system according to any of the embodiments described herein.

[0014] The invention is also implemented by a computer program loadable into a non-volatile data carrier communicatively connected to a processor and a non-volatile data carrier containing the computer program, the computer program comprising software for performing the method according to any of the embodiments presented herein when the computer program is run on the processor.

[0015] Thus, in all aspects of the invention, an automated solution for tracking rewinding spindles is provided for the purpose of evaluating the characteristics of each identified rewinding spindle itself, without any additional work by the operator, and further using the acquired knowledge to draw conclusions about faulty spindles, required maintenance work, etc. Tracking said signatures improves the overall performance of the machine by identifying faulty rewinding spindles and pinpointing the root cause, thereby enabling better maintenance practices, as further explained herein.

[0016] Additional embodiments of the invention are described in the attached dependent claims and in the detailed description in conjunction with the drawings. Advantages described in the summary of the invention, the detailed description or the claims in conjunction with an embodiment of one aspect of the invention also apply to corresponding embodiments of any other aspect of the invention described herein.

[0017] Numerous additional benefits and advantages of the present invention will be readily appreciated by those skilled in the art from the appended claims and accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will now be described in more detail with reference to the accompanying drawings, in which:

[0019] Figure 1 Schematically disclosed is a reel section of a paper machine and monitoring of the performance of at least one rewinding shaft in the reel section according to one or more embodiments of the present invention;

[0020] Figure 2 Schematically disclosed is a system for monitoring the performance of a rewinding shaft in a reel section of a paper machine according to one or more embodiments of the present invention;

[0021] Figure 3 is a flow chart illustrating a method for monitoring the performance of at least one rewinding shaft in a reel section of a paper machine according to one or more embodiments of the present invention;

[0022] Figure 4 It is shown Figure 3 A flowchart of the optional sub-steps of step 310 in FIG.

[0023] Figure 5 is a process flow showing how at least one rewinding shaft goes through a rewinding cycle in a reel section and how information is sent between system components;

[0024] Figure 6 Schematically disclosed Figure 5 Rewinding cycle;

[0025] Figure 7a Schematically showing the individual components of a rewinding shaft, core and roll of paper products; and

[0026] Figure 7b The assembly of a rewinding shaft, core and roll of a paper product is schematically shown.

[0027] All the figures are schematic, not necessarily drawn to scale, and generally show only parts necessary for the elucidation of the various embodiments, while other parts may be omitted or merely suggested. Unless otherwise indicated, any reference numeral appearing in several figures refers to the same object or feature in all figures. DETAILED DESCRIPTION

[0028] Introduction

[0029] The present invention is an automated solution for tracking rewinding shafts (which may also be referred to as reeling shafts, mandrels, winding shafts, spindles, etc.) in the reel section of a paper machine for the following purposes: evaluating at least one characteristic of each identified rewinding shaft, and further using the acquired knowledge to draw conclusions based on the at least one characteristic to detect a faulty rewinding shaft, determine whether maintenance work is required, etc. If the rewinding shaft is transferred to any of one or more subsequent machines (e.g., rewinders, rewinders, and / or conversion machines) after the reel section, the monitoring of the performance of at least one rewinding shaft similar to the invention presented herein may also be applied to one or more subsequent machines. Furthermore, in these subsequent machines, each individual rewinding shaft may be identified using the embodiments presented herein, the information stored about the performance parameters of the rewinding shaft may be used to draw conclusions about the cause of the process deviation in the subsequent machine, additional performance parameters may be determined by processing circuits in the subsequent machine using determination methods similar to the embodiments described herein with respect to the reel section, and if the rewinding shaft is determined to be faulty in any of the ways described herein, an alarm or prompt to an operator may be generated, and / or automatic maintenance or removal of the rewinding shaft may be initiated.

[0030] The embodiments described herein can automatically track key performance indicators without requiring any additional work by the operator. Tracking the indicators can improve the overall performance of the machine by identifying the faulty rewinding spindle and pinpointing the root cause, thereby enabling better maintenance practices, as explained herein.

[0031] The inventors have discovered that one problem with previous solutions for automatic identification and identification using visual markers is that they are primarily related to asset monitoring and management. An example of this related art is found in US20210261374A1, which discloses a method for predicting the presence of product defects during an intermediate processing step of a thin product that is rewound into a roll. According to US20210261374A1, a unique identification code is used for each roll of thin paper product, and process and / or product parameters detected in the production step of the thin product that is rewound into the roll upstream of the intermediate processing step are stored, associated with the unique identification code. The stored product parameters are used to generate predictive diagnostic information for thin product defects based on the results of the comparison. US20210261374A1 does not disclose anything related to identifying individual rewinding shafts or evaluating the characteristics of individual rewinding shafts to improve paper production.

[0032] In existing solutions, there is no automatic identification of the individual rewinding shafts in the rewinding cycle of the reel section. In addition, there is no recording or monitoring of key performance indicators of the individual rewinding shafts. Therefore, in order to identify a faulty rewinding shaft or detect the need to maintain a single rewinding shaft, the operator must perform a manual assessment. Other options are to maintain or replace the rewinding shafts at a predetermined time or at predetermined intervals. Of course, this means that some rewinding shafts will need maintenance or replacement, although they are still functioning normally, which leads to a waste of time, materials and money, while other rewinding shafts are at risk of remaining in the rewinding cycle even if they are faulty, which leads to reduced production and may even cause damage to other parts of the reel section or paper machine. Of course, each manual inspection also leads to additional downtime.

[0033] As another specific example, because previous solutions identify individual rewinding shafts during operation, they do not have and cannot use information about the precise weight of individual rewinding shafts during the rewinding process. Instead, average weights are used during nip control in rewinding and during paper weighing. This results in suboptimal rewinding performance and potential losses due to underestimation of paper weight.

[0034] As the inventors have realised, several controls and measurements performed during the rewinding process are related to the characteristics of the rewinding shafts and these controls and measurements can be improved if the characteristics of the individual rewinding shafts are monitored using the embodiments described herein.

[0035] For example, to optimize the nip load control during rewinding, the weight of the rewinding shaft can be used in the calculation. Alternatively or additionally, this weight can also be used when calculating the weight of the paper on the parent roll. Thus, the actual weight of the single rewinding shaft is used to optimize the rewinding performance and ensure that the paper weight is calculated accurately. Therefore, in some embodiments, the proposed system allows the actual predetermined weight of the rewinding shaft to be used in the nip load control and the paper weight calculation. This improves the rewinding performance and reduces the losses caused by underestimating the paper weight.

[0036] definition

[0037] When two components are referred to herein as being operably connected to each other, this is understood to mean that the components are connected to each other in such a way that a signal, motion or force can be transmitted from one component to another. For example, a vibration sensor being operably connected to a component of a web section is understood to mean that the component of the web section is able to cause the vibration sensor to vibrate, thereby registering the vibration of the component.

[0038] As used herein, the terms "upstream" and "downstream" are related to the direction of movement of a fabric or a paper web in a paper machine. Thus, a position upstream of another is a position that any given point on the fabric or paper web passes before reaching the other. The terms "before" and "after" are used to indicate that any given point on the paper web passes the position "before" another at an earlier point in time than the position "after" the other.

[0039] The reel section (or simply reel) is defined herein as the part of a paper machine where the paper product is wound (rewound, wrapped) onto a rewinding shaft to form a parent roll for subsequent paper product manufacturing processes. Reels are typically used under high speed conditions (e.g. when the paper product comes from a paper machine or a coating machine).

[0040] In this context, reeling is defined as the rewinding of sheets of paper product onto a rewinding reel.

[0041] The rewinding shaft is a metal roller on which the web is rewound during the reeling operation. The rewinding shaft may be referred to herein as a reeling shaft, a winding shaft, a core shaft, a main shaft, etc.

[0042] In this article, the mother roll or master roll is defined as the product of the paper reel in the form of a roll of paper product tightly wound on a cylindrical core on a rewinding shaft. The mother roll undergoes additional processing or rewinding at a later stage of production.

[0043] The core is a cylindrical core on which the paper product is wound to form a parent roll. After winding or rewinding, the core is removed from the rewinding shaft together with the finished paper product of the parent roll wound thereon.

[0044] The mandrel is an inflatable winding spool. The mandrel is inflated / deflated in an inflation / deflation station to hold or release the core of the paper product roll.

[0045] The terms "web" and "sheet" may be used interchangeably to refer to a continuous sheet of paper product from a paper machine or parent reel.

[0046] In this article, turn-up is defined as the process of switching the web from an almost finished parent roll to an empty rewinding shaft, or the process of attaching the web to the core of the rewinding shaft for the first time at start-up. An unsuccessful turn-up is when the web breaks during the turn-up process.

[0047] System Architecture

[0048] In a first aspect of the present invention, there is provided a system for monitoring the performance of each of at least one rewinding shaft in a reel section of a paper machine, which will now be described in conjunction with Figure 1 and Figure 2 And also refer to Figure 5 and Figure 6 Describe it.

[0049] In order to be able to keep the paper machine running continuously, the reel section must be able to quickly switch from rewinding a finished parent roll to rewinding an empty rewinding shaft without stopping the flow of paper products. To achieve this, each reel section will have two or more rewinding shafts that rotate throughout the so-called rewinding cycle. In the context of the present disclosure, the rewinding cycle of the rewinding shaft 120 is defined as starting when the rewinding shaft 120 is identified in the main arm 102 and ending when the same rewinding shaft 120 is identified in the shaft storage 101, or is defined as starting when the rewinding shaft 120 is identified in the shaft storage 101 and ending when the same rewinding shaft 120 is identified in the weighing station 104 or the inflation / deflation station 105 (if the rewinding shaft 120 is an inflatable shaft and therefore passes through the station). Typically, the inflated rewinding shaft 120 will be transferred back to the shaft storage 101 after deflation, removal of the parent roll and inflation, which is the end of the rewinding cycle of this type of rewinding shaft 120. Other types of rewinding shafts 120 are typically transferred from the reel section 100 after the weighing station 104 together with the parent roll wound thereon to a subsequent machine, such as a rewinder, rewinder or conversion machine, for further processing. The rewinding shaft 120 transferred to the subsequent machine may later re-enter the shaft storage of the reel section in the same or another papermaking machine. As described herein in conjunction with the accompanying drawings, the processing circuit 110 can be connected to the rewinding shafts described herein for more than one reel section and perform monitoring of the rewinding shafts. Therefore, the processing circuit 110 can be configured to identify each rewinding shaft 120 in more than one reel section 100 in any manner described herein, and update the rewinding cycle number each time the identified rewinding shaft 120 completes a rewinding cycle in any of the more than one reel sections 100 connected to the processing circuit 110.

[0050] However, a rewinding cycle is by definition a loop, so it can be said to start and end at any point in the loop.

[0051] According to the embodiments of the present invention, the rewinding cycle number is preferably updated at the end of the rewinding cycle, i.e., the recorded rewinding cycle number of the identified rewinding shaft 120 is increased by 1. This means that, for the rewinding cycle according to the current context, the updating of the reel rewinding cycle number is preferably performed at the weighing station 104, the inflation / deflation station 105 or the shaft storage 101.

[0052] First, we turn to Figure 2 , which schematically discloses a system 200 for monitoring the performance of at least one rewinding shaft 120 in a reel section 100 of a paper machine according to one or more embodiments of the present invention.

[0053] The system 200 includes at least one rewinding shaft 120, each of which has a corresponding mark 130, and the mark 130 includes information of a unique identification code ID associated with the rewinding shaft 120. The system 200 also includes a memory 150 that can be accessed by the processing circuit 110. The memory 150 can also be referred to as, for example, a storage device or a database. The memory 150 can be accessed by the processing circuit, which may mean that it is integrated in the system 200 including the processing circuit 110, or it is communicatively connected to the system 200 (more specifically, the processing circuit 110) using any suitable wired or wireless communication method. The memory 150 is configured to receive and store at least one rewinding shaft performance parameter associated with the unique identification code ID of the identified rewinding shaft 120 and other related information, for example, the position / part of the rewinding shaft that determines the rewinding shaft performance parameter.

[0054] The system 200 further includes at least one detector 140 configured to detect the corresponding mark 130 on each rewinding shaft 120, wherein the at least one detector 140 is operably connected to the reel 100 and is positioned along the rewinding cycle of the at least one rewinding shaft 120. Each detector 140 is generally directed toward a portion of the rewinding cycle where the at least one rewinding shaft 120 will pass, and is positioned so that the mark 130 of each rewinding shaft 120 will enter the detection range DR of the detector 140 when passing by. Depending on the type of mark, each detector may include, for example, a QR code scanner, a barcode scanner, an RFID reader, an imaging sensor, a sensor within any other suitable spectrum, and / or any other suitable type of detector or sensing device configured to detect the mark in question.

[0055] The system 200 further includes at least one sensor 160, a processing circuit 110, and a memory 15. Figure 2 In the embodiment, the processing circuit 110 is illustrated with two sensors 160′ and 160″ and is configured to determine parameters indicative of the performance of the rewinding shaft 120, the processing circuit 110 is communicatively connected to the at least one detector 140 and the at least one sensor 160, and the memory 150 is accessible by the processing circuit 110. The memory 150 may also be referred to as a storage device or a database. The fact that the memory 150 is accessible by the processing circuit may mean that it is integrated in the system 200 including the processing circuit 110, or that it is communicatively connected to the system 200 (more specifically, the processing circuit 110) using any suitable wired or wireless communication method.

[0056] Each of the at least one detector 140 is configured to: for each of the at least one rewinding shaft 120, detect a unique identification code ID associated with the rewinding shaft 120 from a corresponding mark 130 on the rewinding shaft 120. Then, the processing circuit 110 is configured to: for each of the at least one rewinding shaft 120, identify the rewinding shaft 120 based on the unique identification code ID. The processing circuit 110 is also configured to: determine at least one rewinding shaft performance parameter of the identified rewinding shaft 120 based on measurements from one or more of the at least one sensor 160, and for each of the at least one rewinding shaft 120, determine whether there is a performance failure of the identified rewinding shaft 120 based on whether the determined at least one rewinding shaft performance parameter satisfies requirements indicating a performance failure of the rewinding shaft 120. Determining whether there is a performance failure of the identified rewinding shaft 120 may also be referred to as determining that the rewinding shaft 120 is faulty and needs to be replaced or maintained.

[0057] Suitably, the described system 200 thus provides an automated solution for tracking rewinding shafts for the purpose of evaluating the characteristics of each identified rewinding shaft itself and further using the knowledge gained to draw conclusions about faulty shafts, required maintenance operations, etc. Compared to previous solutions, this reduces both the need for manual labor and reduces the downtime of the paper machine, and the embodiments herein reduce the maintenance time and cost of rewinding shafts, reel sections, and even entire paper machines and paper mills. Advantageously, reducing or even eliminating manual monitoring and replacing manual monitoring with automatic monitoring using the embodiments described herein further improves the accuracy of maintaining rewinding shafts in the reel section, thereby also improving the entire production process of the paper machine and paper mill. Since the manual handling is reduced and the maintenance is more accurate, resulting in less downtime, the resulting production process will have a higher yield, which helps to maximize the utilization of the rewinding shafts and also improves the service life of other machine components that may be subject to wear due to faulty rewinding shafts.

[0058] The at least one performance parameter may comprise a combination of both measured information and previously stored and retrieved information. The processing circuit 110 may be configured to retrieve the at least one performance parameter from the memory 150 and, for each of the at least one rewinding spindle 120, further determine, based on the retrieved at least one performance parameter, at least one rewinding spindle performance parameter of the identified rewinding spindle 120. Suitably, this allows for consideration of historical data previously determined for the identified rewinding spindle 120 and stored in association with the rewinding spindle 120. Thereby, changes over time may also be advantageously identified and this information used to determine if there is a fault in the performance of the identified rewinding spindle 120. Embodiments of the present invention store information for each measured rewinding spindle performance parameter associated with each identified rewinding spindle, such that not only can the rewinding spindle performance be analyzed at a single point in time to discover any urgent maintenance needs, thus also enabling changes and deterioration trends over time to be discovered, and further enabling prediction of future maintenance needs and the point in time when maintenance may be required.

[0059] The requirements for indicating a fault include at least one criterion (logic rule) to be satisfied, and are stored in memory 150 or in another memory accessible to processing circuit 110, and may be received or retrieved therefrom by processing circuit 110. The requirements for indicating a fault may be preset during startup or production of system 100, and / or may be set or updated during operation based on input from a user interacting with a user interface connected to an input / output device 115 integrated in or communicatively coupled to system 100.

[0060] The processing circuit 110 may be configured to: for each of the at least one rewinding shaft 120, identify the rewinding shaft 120 based on the unique identification code ID by first receiving a detection signal S, S', S" from one of the at least one detector 140. The detection signal S, S', S" indicates the detected unique identification code (ID). Then, the processing circuit 110 is configured to compare the unique identification code ID with the unique identification code set ID stored in the memory 150. 1…n The comparison is performed, wherein each unique identification code in the set is stored in association with a corresponding unique rewinding reel 120. If a match is found between the detected unique identification code ID and a unique identification code in the set stored in the database, the processing circuit 110 is further configured to identify the rewinding reel 120 as being associated with the matching unique identification code ID. n The associated rewinding axis.

[0061] Parameters indicative of the performance of the rewinding spindle 120 may also be referred to as rewinding spindle performance parameters or rewinding spindle key performance indicators, and may include a selection of the number of cycles performed by the rewinding spindle 120, vibrations of components or parts of the reel section caused by the rewinding spindle 120, pressure in the rewinding spindle 120 (if the rewinding spindle is an air-filled mandrel), and / or a number or rate of unsuccessful reels associated with the rewinding spindle 120.

[0062] In one or more embodiments, the processing circuit 110 may be configured to determine that the performance of the identified rewinding shaft 120 is faulty if the determined number of cycles performed by the rewinding shaft 120 in the reel section 100 exceeds a preset maximum number of cycles. In other words, if the determined number of cycles performed by the rewinding shaft 120 exceeds a preset maximum number of cycles, the identified rewinding shaft 120 is determined to be faulty. Advantageously, the system 200 thereby automatically identifies a rewinding shaft 120 that is or is about to be at risk of being worn and introducing errors in processing, and the rewinding shaft 120 may be maintained, replaced, or removed from the reel section 100, either manually or automatically. The preset maximum number of cycles is suitably set to the maximum number of cycles that the rewinding shaft 120 is allowed to perform before it needs to be maintained (i.e., removed, replaced, and / or manually inspected for wear and damage) to ensure continued normal performance of the reel section. The preset maximum number of cycles is preset in the system during setup or startup of the monitoring system, for example, automatically according to a standard setting for the type of rewinding spindle 120, or manually input by a user interacting with the input device 115 via a user interface. Each time a specific rewinding spindle 120 is identified at a specific detector of the at least one detector 140, the number of rewinding cycles in the reel section is increased by one to indicate that the rewinding spindle 120 has performed another rewinding cycle. For example, the number of cycles performed by the specific rewinding spindle 120 may be increased by one each time the specific rewinding spindle 120 enters the range of the detector 140, which is arranged at the main arm 102, the auxiliary arm 103 or the weighing station 104 of the reel section 100, or at any other selected suitable location along the rewinding cycle.

[0063] Alternatively or additionally, the processing circuit 110 may be configured to determine that the performance of the identified rewinding shaft 120 is faulty if the vibration induced in a certain component of the reel section 100 by the rewinding shaft 120 exceeds a vibration threshold value, the vibration threshold value indicating the highest allowable vibration value for balancing the rewinding shaft 120 relative to the corresponding component of the reel section 100. In these embodiments, the at least one sensor 160 comprises at least one vibration sensor or an acoustic sensor, and the processing circuit 110 is configured to determine at least one vibration value indicating the vibration induced in a component or part of the reel section 100 by the rewinding shaft 120 based on one or more measurements from the at least one vibration sensor. In these embodiments, the processing circuit 110 is further configured to determine whether the performance of the identified rewinding shaft 120 is faulty by comparing each of the at least one vibration value with a corresponding vibration threshold value of one or more components of the reel section 100. The vibration may be measured directly using a vibration sensor, or may be measured indirectly by measuring the noise level using an acoustic sensor, in which case the threshold value is defined in Db. The vibrations induced by a particular rewinding shaft 120 on one or more components of the reel section 100 may be monitored once and compared to a fixed vibration threshold. Alternatively, the vibrations induced by a particular rewinding shaft 120 on one or more components of the reel section 100 may be monitored over time (typically once per rewinding cycle), and the vibration threshold may be relative, indicating the highest permissible vibration value of a balanced rewinding shaft 120 relative to a corresponding component of the reel section 100, which may also depend on the number of rewinding cycles performed by the rewinding shaft 120, or indicating the highest permissible vibration growth rate of the balanced rewinding shaft 120. Advantageously, the system 200 thereby automatically identifies a rewinding shaft 120 that is or is about to be at risk of losing balance and introducing errors in the process, and the rewinding shaft 120 may be maintained, replaced or removed from the reel section 100 manually or automatically.

[0064] In one or more embodiments, the main arm 102 may include a first load arm and a second load arm (not shown in the figure), which are configured to hold the rewinding shaft 120 and press it against the web on the reel drum 122 or the reel belt for winding. If the pressure difference exceeds the allowable amount (threshold), it indicates that the rewinding shaft 120 is out of balance. In these embodiments, the first load arm is arranged to hold the rewinding shaft 120 at or near the first end of the rewinding shaft 120 facing the drive side (back side) of the reel section 100, and the second load arm is arranged to hold the rewinding shaft 120 at or near the second opposite end of the rewinding shaft 120 facing the operating side (operator side) of the reel section 100. The load arms are pressurized by first and second cylinders (not shown in the figure), such as hydraulic cylinders, which are also included in the main arm 102. As an alternative to or in addition to the above-described manner of detecting an unbalanced winding shaft 120, in these embodiments, an unbalanced winding shaft 120 may be identified by measuring and comparing the corresponding pressures in the first cylinder and the second cylinder. For a balanced winding shaft 120, the pressure applied to pressurize the first load arm and the second load arm should be the same. In these embodiments, the processing circuit 110 may be configured to determine that there is a fault in the performance of the identified winding shaft 120 if the difference in the pressures applied by the first cylinder and the second cylinder to pressurize the corresponding first load arm and the second load arm exceeds a pressure difference threshold indicating a maximum allowable pressure difference of the balanced winding shaft 120. In these embodiments, the at least one sensor 160 includes at least one first pressure sensor and at least one second pressure sensor, the at least one first pressure sensor being connected to the first cylinder and configured to measure the pressure in the first cylinder or the pressure applied by the first cylinder, and the at least one second pressure sensor being connected to the second cylinder and configured to measure the pressure in the second cylinder or the pressure applied by the second cylinder. The processing circuit 110 is then configured to receive pressure measurements from the at least one first pressure sensor and the at least one second pressure sensor and determine a difference in pressure in the first cylinder and the second cylinder or a difference in pressure applied by the first cylinder and the second cylinder based on the received measurements. In these embodiments, the processing circuit 110 is further configured to determine that there is a fault in the performance of the identified rewinding shaft 120 if the determined pressure difference exceeds a pressure difference threshold.

[0065] Advantageously, the system 200 thereby automatically identifies a rewinding spool 120 that is or is about to be at risk of losing balance and introducing errors in processing, and the rewinding spool 120 may be maintained, replaced or removed from the reel section 100, either manually or automatically.

[0066] If the identified rewinding shaft 120 is an air-filled mandrel, the at least one sensor 160 may include at least one pressure sensor, the at least one pressure sensor being configured to measure the pressure in the air-filled mandrel using any pressure sensing technology, including but not limited to ultrasonic technology, acoustic imaging technology, electromagnetic technology, optical technology, or strain gauge technology. The at least one pressure sensor is configured to send the measured pressure value to the processing circuit 110. In these embodiments, as an alternative to or in addition to other embodiments described herein, the requirement for indicating a performance failure includes that the rewinding shaft 120 has a valve leak. In these embodiments, the processing circuit 110 is configured to determine that the performance of the identified rewinding shaft 120 is faulty if the measured pressure value deviates from the reference pressure value of the air-filled mandrel by more than the allowable tolerance. In this embodiment, the rewinding shaft 120 is an air-filled mandrel. Advantageously, the system 200 thereby automatically identifies the rewinding shaft 120 that has a valve leak and is at risk of introducing errors in the process, and the rewinding shaft 120 can be maintained, replaced, or removed from the paper reel 100 manually or automatically. All pressure values ​​measured using at least one pressure sensor (preferably at the inflation / deflation station of the reel section) are stored in the memory 150 in association with the identified mandrel. Of course, any combination of at least one stored pressure value of the mandrel and the current measured pressure value of the mandrel at the current position of the reel in the rewinding cycle (including the pressure change derived from the pressure values ​​measured over time) can be used as a basis for determining whether the mandrel has a valve leak. If the deviation of the determined pressure value or the estimated value from the reference pressure value exceeds the allowed tolerance, it is determined that the mandrel has a valve leak. The reference pressure value can be set to a previously measured pressure of the mandrel, indicating that the pressure has decreased since the last measurement, or can be a preset reference value for the type of mandrel used. The reference pressure value is stored in the memory 150 and retrieved from the memory 150.

[0067] In some embodiments, the pressure in the inflated mandrel can be checked once per rewinding cycle by measuring the pressure at the inflation / deflation station 105 before deflation, after which the inflated mandrel is deflated and then inflated with a new core mounted thereon. In this embodiment, a second pressure measurement is made directly after inflation, and this pressure measured directly after inflation is set as the reference value. Thus, it can be advantageously determined whether the pressure in the inflated mandrel drops more than expected during the rewinding cycle, which indicates a valve leak.

[0068] Alternatively or additionally, the requirement indicating a performance failure of the rewinding spindle 120 may include an unsuccessful winding rate of the rewinding spindle 120 equaling or exceeding a preset maximum unsuccessful winding rate. In these embodiments, the processing circuit 110 is configured to determine the number of unsuccessful windings associated with the rewinding spindle 120 and compare it with the total number of winding cycles performed by the rewinding spindle 120 to determine the unsuccessful winding rate of the rewinding spindle 120. The processing circuit 110 is also configured to determine that there is a performance failure of the identified rewinding spindle 120 if the unsuccessful winding rate of the rewinding spindle 120 equals or exceeds the preset maximum unsuccessful winding rate. Advantageously, the system 200 thereby automatically identifies the rewinding spindle 120 that has unsuccessful winding for any reason, resulting in costly and time-consuming processing stops and reduced production, and the rewinding spindle 120 can be manually or automatically maintained, replaced, or removed from the reel section 100. As is known in the art, unsuccessful winding is largely due to spindle failure. In this embodiment, the number of unsuccessful roll-ups or the unsuccessful roll-up ratio calculated as the ratio between the number of unsuccessful roll-ups and the total number of rewinding cycles performed by the rewinding spindle 120 is included in at least one rewinding spindle performance parameter of the identified rewinding spindle 120 based on measurements from at least one sensor 160. In this case, the one or more sensors 160 include sensors configured to detect sheet-breaks in any known manner. Each time the rewinding spindle is detected by a selected detector 140 in a rewinding cycle and identified by the processing circuit 110, the number of rewinding cycles performed by the rewinding spindle 120 is increased by 1, and then the current number of rewinding cycles is stored in the memory 150 in association with the identified rewinding spindle 120. Therefore, the processing circuit 110 can retrieve the number of rewinding cycles for each identified rewinding spindle 120 from the memory 150 so that the processing circuit 110 determines the unsuccessful roll-up ratio associated with the rewinding spindle 120. The memory is further configured to store a preset maximum unsuccessful roll-up ratio for comparison, and the processing circuit 110 is configured to retrieve the preset maximum unsuccessful roll-up ratio for comparison from the memory 150. The preset maximum unsuccessful roll-up ratio may be set once, for example, during production or startup, or the current maximum unsuccessful roll-up ratio may be updated via a user interface connected to an input / output device 115 communicatively coupled to the processing circuit 110.

[0069] If it is determined that there is a fault in the performance of the rewinding shaft 120 in the reel section, the rewinding shaft can be further removed or replaced manually or automatically according to any embodiment of the invention described herein. Suitably, an improved maintenance scheme is thus provided. Information about the fault can be presented to the operator via a user interface connected to the input / output device 115, and information about the predicted maintenance needs may also be presented to the operator, thereby prompting the operator to initiate manual or automatic maintenance, replacement or removal of the faulty rewinding shaft 120. If the rewinding shaft 120 is repeatedly tracked in the rewinding cycle and is determined to be faulty, for example, because the rewinding shaft 120 loses balance (causing vibrations about which the system has measured and stored information), approaches its maximum cycle volume (iteratively updating the cycle number based on the identification of the rewinding shaft at a certain position in the rewinding cycle) and / or has a valve leak (measured in the inflation / deflation section), the operator of the system 200 can thereby be advantageously warned to take maintenance work in the form of removing or replacing the rewinding shaft 120, and / or the system 200 can automatically perform these operations.

[0070] Advantageously, this information enables operators to easily perform required maintenance, replacement, removal, etc. based on timely and accurate information. Figure 2 As shown, if it is determined that there is a fault in the performance of the rewinding shaft 120, the processing circuit 110 may be configured to generate a first control signal C1, which is configured to cause the actuator 170 of the paper reel section 100 to remove the rewinding shaft 120 from the paper reel section. Figure 2 As further shown, in these embodiments, the processing circuit 110 may also be configured to generate a second control signal C2, which is configured to cause the same actuator 170 or another actuator 190 of the reel section to replace the removed reel with a new reel from the reel storage or shaft storage 101. The reel storage 101 includes reel spools 120 that are known to be functioning (i.e., non-faulty). The reel spools 120 in the shaft storage 101 may be non-faulty in terms of all reel performance parameters evaluated in different embodiments herein, or may not be completely non-faulty but may be considered acceptable for operation. The storage of functioning, possibly non-faulty reel spools is appropriately arranged to be connected to the reel section 100 and can be accessed by the actuators 170, 190, which are configured to replace any removed faulty reel spools 120.

[0071] In some embodiments, the weight value of each unique rewinding shaft 120 has been previously measured and stored in the memory 150 in association with the corresponding unique rewinding shaft. In these cases, the weight of the unique rewinding shaft has been determined before the rewinding shaft enters the rewinding cycle or before being installed in the reel section. Therefore, the memory 150 is configured to store the weight value of each unique rewinding shaft 120 in association with the corresponding unique rewinding shaft 120. In these embodiments, the processing circuit 110 can be configured to: retrieve the weight of the identified rewinding shaft 120 from the memory 150, determine the desired nip load in (a portion of) the reel section 100 based on the weight of the identified rewinding shaft 120, and control the nip load in (a portion of) the reel section 100 based on the desired nip load. Advantageously, the actual measured weight of the identified rewinding shaft 120 is used, thereby providing a more accurate determination of the optimal nip load compared to known solutions. Alternatively or additionally, the system 200 according to these embodiments further includes a weighing instrument (not shown in the figure), such as a scale, etc., which is arranged at the weighing station 104 and is communicatively connected to the processing circuit 110. The weighing instrument is configured to determine the total weight of the rewinding shaft 120 on which the paper product P is rewound when the rewinding shaft 120 is located in the weighing station 104 in the paper reel section 100. In this case, the processing circuit is further configured to: receive or retrieve the determined total weight from the weighing instrument in the processing circuit 110, receive or retrieve the weight of the rewinding shaft 120 from the memory 150, and determine the accurate weight of the paper product P rewound on the rewinding shaft 120 by subtracting the retrieved weight of the rewinding shaft 120 from the determined total weight. Thus, a more accurate determination of the weight of the paper product is achieved compared to assuming that the rewinding shaft is of a standard weight, thereby more accurately determining when a target weight or target amount of paper products is rewound on the parent roll and when rewinding is required.

[0072] If a rewinding spindle performance parameter is measured by the sensor 160 at the position of the currently identified rewinding spindle 120, information about the determined identity of the rewinding spindle 120 (i.e., the detected ID or identity information derived based on the ID) and the determined, measured at least one rewinding spindle performance parameter are sent to the memory 150 together with information about the position of the identified rewinding spindle 120 (if the position is related to the at least one performance parameter) for storage and further processing.

[0073] Assigning a unique identification code ID to the reel 120 may include providing or applying a tag 130 to the reel 120 in the form of graphic information (QR code, bar code, unique set of alphanumeric symbols, unique pattern, (one or more) symbols and / or colors or color combinations, etc.), electronic information in the form of an active or passive transmitter (e.g., RFID tag, etc.), and / or tape information, and storing the unique identification code ID in the memory 150 in association with the corresponding unique reel 120 assigned the ID. In other words, each reel 120 may be electronically marked by applying a first electronic tag or label (e.g., RFID media or label) or another type of mark that can be detected by the detector described herein. In the case of electronic or magnetic media, the assignment may include a programming step for assigning the ID of the marking medium (e.g., RFID tag), which occurs before applying the tag to the at least one reel 120.

[0074] For example, each mark 130 can be applied on the outer edge of the corresponding rewinding shaft 120, or applied at any other suitable location that enables at least one detector 140 to view, sense, read or otherwise detect the mark, that is, applied at any location on the rewinding shaft 120 that enables the mark to enter the detection range of (one or more) detectors arranged to detect the mark along the rewinding cycle. The mark can be applied in any suitable manner, depending on the type of mark. In some embodiments, the system 200 also includes a marking device that is configured to apply the mark to the rewinding shaft before detecting the unique identification code associated with the rewinding shaft based on the mark.

[0075] In some embodiments, the system 200 is configured to perform monitoring of the performance of at least one rewinding shaft 120 for each rewinding shaft 120 that enters a detection range DR of one of the at least one detectors 140. Specifically, entering the detection range DR of the detector 140 means that the mark 130 on the rewinding shaft 120 appears in the detection range DR of the detector 140, which may also be referred to as a detection area, a sensing area, or a sensing range. In any embodiments herein, the detector 140 is positioned and arranged to detect the rewinding shaft 120 present at a specific location (e.g., any paper roll sub-section, including the shaft storage 101, the main arm 102, the auxiliary arm 103, the weighing station 104, or the inflation / deflation station 105), which means that the detector 140 is positioned so that the portion of the rewinding shaft 120 including the mark 130 will enter the detection range DR of the detector as it enters, exists, or leaves a specific location. Figure 2, this is illustrated by the detector 140 having a detection range DR in which the marking 130″ of the rewinding shaft 120″ is present, so that the detector 140 can detect the rewinding shaft 120″ based on the marking 130″. Similarly, the rewinding shaft 120 is identified as being located in, for example, the main arm 102, which means that it is detected by the detector 140 located at the main arm 102, i.e. within the detection range of the detector 140. The markings 130′ and 130″′ of the rewinding shafts 120′ and 120″′ are located respectively Figure 2 The detector 140 is outside the detection range DR of the detector 140 and therefore cannot be detected by the detector 140. The detector may also be referred to as, for example, a reader, a sensor, a scanning device or any other suitable device configured to detect, read, sense or scan information from a tag. Figure 2 The positions, shapes and sizes of the markings 130 ′, 130 ″ and 130 ′″ on the respective rewinding reels 120 ′, 120 ″ and 120 ′″ are non-limiting examples shown for illustrative purposes only.

[0076] In some embodiments, instead of or in addition to detecting the ID of the rewinding shaft 120, at least one of the at least one detector 140 may be configured to detect a unique core identification code ID associated with a core from a core marking on a core mounted on the rewinding shaft 120. CORE The core marking may be any type of marking described herein in conjunction with marking 130 . Figure 7a A schematic perspective view showing the individual components of the rewinding shaft 120, the core 701 and the roll 702 of the paper product P, Figure 7b 1 shows a schematic side view of an assembly including a rewinding shaft 120, a core 701 and a roll 702 of a paper product P. The core marking is not shown in the figure, but those skilled in the art recognize that the core marking can be applied to the core 701 in any suitable manner and at any suitable location. In these embodiments, the processing circuit 110 is further configured to: COREThe core 701 is identified, and it is also determined whether there is a fault in the performance of the identified rewinding shaft 120 based on the stored or measured information about the performance of the core. By including the information about the performance of the core, any fault related to the core rather than the rewinding shaft 120 can be determined, and a false negative that would otherwise lead to a determination that there is a fault in the performance of the identified rewinding shaft 120 can be advantageously avoided. For example, or according to embodiments herein, if it is determined that at least one rewinding shaft performance parameter meets the requirements indicating a performance fault of the rewinding shaft 120, and it is also determined that the core mounted on the rewinding shaft 120 is faulty, this may indicate that it is in fact the core rather than the rewinding shaft 120 that causes the problem. Similarly, if a problem that seems to be related to the performance of the rewinding shaft 120 is detected in one rewinding cycle, but the same problem is not detected for the same rewinding shaft 120 in the next rewinding cycle, i.e., after the core and the paper roll thereon are changed, it can be concluded that the problem is caused by the previous core rather than the rewinding shaft 120. Therefore, an even more reliable determination of whether there is a fault in the performance of the identified rewinding shaft 120 is achieved.

[0077] refer to Figure 1 , Figure 5 and Figure 6 , we will now describe how each rewinding shaft goes through a rewinding cycle in the reel section. The direction of the rewinding cycle is Figure 6 In FIG. 1 , an arrow from 101 to 102, an arrow from 102 to 103, etc. are shown. Figure 1 and Figure 6 In the figure, the rewinding shaft 120 is shown without the rewinding paper product thereon. This is only for illustrative purposes, so as to more easily explain how the rewinding shaft passes through the rewinding cycle.

[0078] like Figure 1 and Figure 6 As shown, the reel section 100 comprises a number of subsections including a shaft storage 101, a main arm 102, a secondary arm 103, a weighing station 104 and possibly an inflation / deflation station 105 (if a mandrel / inflation rewinding shaft is used).

[0079] Using a lowering arm or any other suitable actuator, the empty reel spool 120 from the spool storage 101 can be loaded onto the main arm 102 above the reel spool 122 (e.g. Figure 1 and Figure 6) or loaded onto a paper reel. When the parent roll is completed on the previous rewinding shaft 120 located at the secondary arm 103 (e.g., as determined by reaching its maximum diameter), the main arm 102 lowers the new empty rewinding shaft 120 into contact with the reel drum 122 or paper reel, and a machine (not shown) operably connected to the reel drum 122 or paper reel will move the tape along the moving paper product sheet, apply glue, etc., quickly tear it off and attach the incoming paper product to the new rewinding shaft 120. The new rewinding shaft is then lowered onto the secondary arm 103. After winding, the secondary arm 103 steadily guides the rewinding shaft 120 away from the reel drum 122 or paper reel as the paper product is rewound onto the core of the rewinding shaft 120 and the diameter of the paper product on the rewinding shaft 120 increases. When the parent roll on the current rewinding shaft 120 at the auxiliary arm is completed, the rewinding is performed again, and the current rewinding shaft 120 on which the completed parent roll is rewound is kicked out and transferred to the weighing station 104. After weighing at the weighing station 104, if inflation and / or deflation is required, the rewinding shaft 120 can be advanced to the inflation / deflation station 105 downstream of the weighing station 104. Thereafter, the rewinding shaft 120 can be transferred back to the shaft storage 101 from the inflation / deflation station 105, for example, using a bridge crane or any other suitable actuator. The rewinding shaft 120 can be returned to the main arm 102 from the shaft storage 101, thereby entering a new rewinding cycle. Alternatively, if the rewinding shaft 120 is not inflated, the rewinding shaft 120 is transferred from the terminal station (e.g., the weighing station 104 or a separate station after the weighing station 104) to a subsequent machine, such as a rewinder, a rewinder and / or a conversion machine, to further process the parent roll rewound thereon. Alternatively, if at any time during the rewinding cycle it is determined that the performance of the current rewinding spool 120 is faulty, the rewinding spool 120 may be removed from the reel for adjustment, maintenance, or disposal. Figure 6 The transfer of the rewinding shaft 120 to a subsequent machine for further processing of the parent roll or the removal of the rewinding shaft 120 is shown by arrow 106. Preferably, the rewinding shaft 120 is removed manually or automatically by sending a control signal to a removal actuator from the inflation / deflation station 105 or the shaft storage 101 or somewhere in between, including removal at a subsequent machine for further processing of the parent roll, in other words, after the parent roll has been removed from the rewinding shaft 120 and before the rewinding shaft 120 reenters the main arm 102 of the same or another reel section 100.

[0080] Now turn to Figure 1 , showing two detectors 140 ′, 140 ″, which are configured to detect a unique identification code ID associated with the rewinding shaft 120 from the mark 130 on the rewinding shaft 120, such as in combination with Figure 2The detectors 140', 140" are configured to generate corresponding detection signals S', S" and send these detection signals to the processing circuit 110 for interpretation and further processing. Figure 1 For ease of illustration, only two detectors 140′, 140″ are shown, and they are shown as being located at the shaft storage 101 and the inflation / deflation station 105. However, in any embodiments herein, there may be at least one detector 140 located at one or more of the shaft storage 101, the main arm 102, the auxiliary arm 103, the weighing station 104, and possibly the inflation / deflation station 105.

[0081] Figure 5 It is a process flow showing how at least one rewinding shaft goes through a rewinding cycle in the reel section and how information is sent between system components. Depending on how many detectors are arranged at different locations in the reel section, inspection or detection steps 502, 506, 510, 514 and 522 can be selected. The process flow includes:

[0082] In step 502 , a first detector located at the main arm 102 is used to check whether there is a rewinding shaft 120 in the main arm 102 .

[0083] The inspection of step 502 is performed using a first detector (not shown) located at the main arm 102, which is positioned and arranged to detect the presence of the rewinding shaft 120 in the main arm 102 by detecting the unique identification code ID associated with the rewinding shaft 120 from the mark 130 on the rewinding shaft 120 in the main arm 102.

[0084] Once the first detector detects the take-up reel 120 at the main arm 102 , information indicative of the unique identification code ID associated with the take-up reel 120 is sent from the first detector to the processing circuit 110 in the form of a first detection signal indicative of the unique identification code ID.

[0085] The processing circuit 110 is configured to identify the rewinding shaft 120 based on the first detection signal, as described herein. Based on additional information included in the first detection signal indicating the location of the rewinding shaft 120, or information about the identity of the first detector and its location within the reel section, the processing circuit 110 may also be configured to determine that the identified rewinding shaft is located at the main arm 102. If it is determined that the rewinding shaft 120 is present in the main arm 102, the process continues to step 504 when it is time to roll up the next time.

[0086] In step 504 , the rewinding shaft 120 is transferred from the main arm 102 to the auxiliary arm 103 .

[0087] In step 506 : it is checked whether there is a rewinding shaft 120 in the secondary arm 103 .

[0088] The check of step 506 is performed using a second detector 140 (not shown) located at the secondary arm 103, which is positioned and arranged to detect the presence of the rewinding shaft 120 in the secondary arm 103 by detecting the unique identification code ID associated with the rewinding shaft 120 from the mark 130 on the rewinding shaft 120. The information of the unique identification code ID associated with the rewinding shaft 120 is sent from the second detector 140 to the processing circuit 110 together with the information of the position where the rewinding shaft 120 is detected in any manner described in conjunction with step 502.

[0089] At the secondary arm, the paper product is rewound onto the rewinding shaft 120 to form a parent roll. If the rewinding shaft 120 exists in the secondary arm 103 and the rewinding is completed, the process continues to step 508.

[0090] In step 508 , the rewinding shaft 120 is transferred from the auxiliary arm 103 to the weighing station 104 .

[0091] In step 510 : it is checked whether the rewinding shaft 120 exists in the weighing station 104 .

[0092] The check of step 510 may be performed using a third detector 140 (not shown) located at the weighing station 104, the third detector 140 being positioned and arranged to detect the presence of the rewinding shaft 120 in the weighing station 104 by detecting the unique identification code ID associated with the rewinding shaft 120 from the marking 130 on the rewinding shaft 120. The information of the unique identification code ID associated with the rewinding shaft 120 is sent from the second detector 140 to the processing circuit 110 together with the information of the position where the rewinding shaft 120 is detected in any manner described in conjunction with step 502.

[0093] After the weighing station 104, if the rewinding shaft 120 is a pneumatic rewinding shaft 120 (optionally checked in step 511), the process continues to optional step 512. Alternatively, if the rewinding shaft 120 is not a pneumatic rewinding shaft 120, the process continues to optional step 515.

[0094] In optional step 512 , the rewinding shaft 120 is transferred from the weighing station 104 to the inflation / deflation station 105 .

[0095] This step is performed if the rewinding spool 120 is a pneumatic rewinding spool.

[0096] In optional step 514 : checking whether the rewinding shaft 120 is present in the inflation / deflation station 105 .

[0097] The inspection of step 514 may be performed using a fourth detector 140 (e.g., Figure 1The fourth detector 140 is located at the inflation / deflation station 105 and is positioned and arranged to detect the presence of the rewinding shaft 120 in the inflation / deflation station 105 by detecting the unique identification code ID associated with the rewinding shaft 120 from the mark 130 on the rewinding shaft 120. The information of the unique identification code ID associated with the rewinding shaft 120 is sent from the second detector 140 to the processing circuit 110 together with the information about the position where the rewinding shaft 120 is detected in any manner described in conjunction with step 502.

[0098] exist Figure 1 In the example shown, the marker 130 is attached to or near the end of the rewinding shaft 120 facing the fourth detector 140', or is integrated in or near the end of the rewinding shaft 120 facing the fourth detector 140'. Figure 1 As shown, and also true for any or all detectors 140 in embodiments of the present invention, the fourth detector is configured to generate a detection signal, the detection signal including information about the unique identification code ID and information about the detected rewinding shaft 120 and / or the position of the fourth detector. In other words, the signal indicates the identity and position ("in the inflation / deflation station") of the detected rewinding shaft 120. Figure 1 In FIG. 1 , the fourth detection signal is illustrated as the detection signal S′.

[0099] In optional step 515 , the rewinding shaft 120 is transferred from the reel section 100 to a subsequent machine for further processing.

[0100] This step is performed if the rewinding shaft 120 is not an air-filled rewinding shaft, ie if the paper product of the parent roll is rewound directly onto the rewinding shaft 120 instead of onto a removable core.

[0101] The subsequent machine may be, for example, a rewinder, a rewinder or a converting machine.

[0102] Unless the rewinding shaft 120 is found to be faulty at any time after step 515 , it can later be reintroduced into a new rewinding cycle in the same or another reel 100 in step 520 .

[0103] In step 516 : using the processing circuit 110 , it is determined whether there is a fault in the performance of the identified rewinding spindle 120 .

[0104] Step 516 need not be performed sequentially after step 514. Instead, the identified rewinding shaft 120 may be checked for faults or maintenance at or between any steps of the process flow. As shown, the information collected during any or all of the checking steps 502, 506, 510, 514, and / or 522 may be used as a basis for determining in step 516 whether the performance of the identified rewinding shaft 120 is faulty.

[0105] If it is determined that there is a fault in the performance of the identified rewinding spindle 120 , process flow continues to step 518 .

[0106] In step 518: the identified rewinding shaft 120 is removed from the paper take-up section.

[0107] The step 518 of removing the rewinding shaft 120 from the paper take-up section in response to determining that the performance of the identified rewinding shaft 120 is faulty may be performed at Figure 5 The process flow of the invention can be performed between any two steps in the process flow of the invention. However, it is preferred to perform this step when there is no paper product being rewound on the rewinding shaft. Preferably, the identified faulty rewinding shaft 120 is removed from the inflation / deflation station 105 after the finished parent roll is removed from the rewinding shaft 120, or is removed from the shaft storage 101 before the rewinding shaft 120 enters a new rewinding cycle.

[0108] The removal of the rewinding shaft 120 may be automated and may be accomplished using any suitable actuator (e.g., a bridge crane, etc.) to control the removal of the rewinding shaft 120 in response to a control signal generated by the processing circuit 110. Alternatively, the removal of the rewinding shaft 120 may be performed manually or by manually controlling an actuator (e.g., a bridge crane, etc.).

[0109] In step 520 : the rewinding shaft 120 is transferred from the inflation / deflation station 105 to the shaft storage 101 .

[0110] In step 522 : it is checked whether the rewinding shaft 120 exists in the shaft storage 101 .

[0111] The inspection of step 522 may be performed using a fifth detector 140 (e.g., Figure 1 The fifth detector 140 is located at the inflation / deflation station 105 and is positioned and arranged to detect the presence of the rewinding shaft 120 in the inflation / deflation station 105 by detecting the unique identification code ID associated with the rewinding shaft 120 from the mark 130 on the rewinding shaft 120. The information of the unique identification code ID associated with the rewinding shaft 120 is sent from the second detector 140 to the processing circuit 110 together with the information of the position where the rewinding shaft 120 is detected in any manner described in conjunction with step 502.

[0112] exist Figure 1 In the example shown, the marker 130 is attached to or near the end of the rewinding shaft 120 facing the fifth detector 140 ″, or is integrated in or near the end of the rewinding shaft 120 facing the fifth detector 140 ″. Figure 1 As shown, and this is also true for any or all detectors 140 in embodiments of the present invention, the fifth detector is configured to generate a detection signal, the detection signal including information about the unique identification code ID and optionally about the position of the detected rewinding shaft 120 and / or the fourth detector. In other words, the signal indicates the identity of the detected rewinding shaft 120 and optionally indicates the position of the detected rewinding shaft 120 ("in the shaft storage"). Figure 1 In the figure, the fifth detection signal is illustrated as the detection signal S".

[0113] In step 524 : the rewinding shaft 120 is transferred from the shaft storage 101 to the main arm 102 .

[0114] Thus, the rewinding cycle is completed and the process flow restarts from step 502.

[0115] Alternatively or additionally, for combining Figure 1 , Figure 2 , Figure 5 or Figure 6 The position information included in the detection signal of any of the described detectors can be obtained by obtaining the position of the rewinding shaft 120 via a signal sent to the processing circuit 110 from one or more proximity switches or proximity sensors (not shown in the figure) provided in the paper winding section.

[0116] Method Embodiment

[0117] In the second aspect, Figure 3 and Figure 4 As shown, the present invention is implemented by a computer-implemented method for monitoring the performance of at least one rewinding shaft 120 in a reel section 100 of a papermaking machine, the reel section 100 being operably connected to at least one detector 140, the at least one detector 140 being configured to detect a corresponding mark 130 on each rewinding shaft 120, wherein the at least one detector 140 is positioned along the rewinding cycle of the at least one rewinding shaft 120.

[0118] Figure 3 The method shown comprises, for each rewinding spool 120:

[0119] In step 300 , a unique identification code ID associated with the rewinding spool 120 is detected from the marking 130 on the rewinding spool 120 using at least one of the at least one detector 140 .

[0120] In step 310 : using the processing circuit 110 communicatively connected to the detector 140 , the rewinding spool 120 is identified based on the unique identification code ID.

[0121] Using the processing circuit 110 to identify the rewinding shaft 120 based on the unique identification code ID may include: receiving the detection signal S, S', S", from the detector 140 in the processing circuit 110, and the detection signal S, S', S", indicating the detected unique identification code ID; using the processing circuit 110 to compare the unique identification code ID with the unique identification code set ID stored in the memory 150; 1…n a comparison, wherein each unique identifier in the set is stored in association with a corresponding unique rewinding reel 120; and if a match is found between the detected unique identifier ID and a unique identifier in the set stored in the database, identifying the rewinding reel 120 as being associated with the matching unique identifier ID using the processing circuit 110 n The associated rewinding axis.

[0122] In step 320 : at least one rewinding spool performance parameter of the identified rewinding spool 120 is determined based on measurements from at least one sensor 160 using the processing circuit 110 .

[0123] Determining at least one rewinding spindle performance parameter of the identified rewinding spindle 120 may include using at least one sensor 160 configured to determine a parameter indicative of the performance of the identified rewinding spindle 120. Alternatively or additionally, determining at least one rewinding spindle performance parameter of the identified rewinding spindle 120 may include receiving or retrieving, by the processing circuit 110, from the memory 150 at least one previously measured and stored performance parameter indicative of the performance of the identified rewinding spindle 120. Thus, the at least one performance parameter may include a combination of measured information and previously stored and retrieved information.

[0124] In optional step 330 , the determined at least one rewinding spindle performance parameter is stored in association with the unique identification code ID of the identified rewinding spindle 120 in a memory 150 accessible to the processing circuit 110 .

[0125] In step 340 : it is checked whether at least one rewinding spindle performance parameter meets the requirement indicating a performance failure of the rewinding spindle 120 .

[0126] The requirement indicating a performance fault of the rewinding spindle 120 may include the number of cycles performed by the rewinding spindle 120 being equal to or exceeding a preset maximum number of cycles. In these embodiments, the at least one rewinding spindle performance parameter determined includes the number of cycles performed by the rewinding spindle 120, and if the determined number of cycles performed by the rewinding spindle 120 exceeds the preset maximum number of cycles, the processing circuit 110 determines that the performance of the identified rewinding spindle 120 is faulty.

[0127] Alternatively or additionally, the requirement indicating a performance fault of the rewinding shaft 120 may include the rewinding shaft 120 being out of balance. In these embodiments, determining, using the processing circuit 110, at least one rewinding shaft performance parameter of the identified rewinding shaft 120 based on measurements from the at least one sensor 160 includes determining, based on one or more measurements from the at least one vibration sensor, at least one vibration value indicative of vibrations in a component or part of the reel section caused by the rewinding shaft 120, and determining, using the processing circuit 110, that the performance of the identified rewinding shaft 120 is faulty includes comparing each of the at least one vibration value to a corresponding vibration threshold value indicative of a highest allowable vibration value for a balanced rewinding shaft 120.

[0128] In embodiments where the rewinding shaft 120 is a pneumatic mandrel, the requirement indicating a performance failure of the rewinding shaft 120 may alternatively or additionally include that the rewinding shaft 120 has a valve leak. In these embodiments, determining at least one rewinding shaft performance parameter of the identified rewinding shaft 120 based on measurements from at least one sensor 160 using the processing circuit 110 includes determining a pressure in the pneumatic mandrel using at least one pressure sensor, and determining that there is a performance failure of the identified rewinding shaft 120 using the processing circuit 110 includes comparing the determined pressure with a preset reference pressure value of the rewinding shaft 120.

[0129] Alternatively or additionally, the requirement indicating a performance fault of the rewinding spindle 120 may include an unsuccessful winding rate of the rewinding spindle 120 being equal to or exceeding a preset maximum unsuccessful winding rate. In these embodiments, determining at least one rewinding spindle performance parameter of the identified rewinding spindle 120 based on measurements from at least one sensor 160 using the processing circuit 110 includes: determining a number of unsuccessful windings associated with the rewinding spindle 120 and comparing it to a total number of winding cycles performed by the rewinding spindle 120 to determine the unsuccessful winding rate of the rewinding spindle 120, and determining that there is a performance fault of the identified rewinding spindle 120 using the processing circuit 110 includes: comparing the unsuccessful winding rate of the rewinding spindle 120 to a preset maximum unsuccessful winding rate.

[0130] If at least one of the rewinding spindle performance parameters meets the requirements indicating a performance fault of the rewinding spindle 120 , the method proceeds to step 350 .

[0131] In step 350 : using the processing circuit 110 , it is determined that the performance of the identified rewinding reel 120 is faulty.

[0132] If it is determined that there is a fault in the performance of the rewinding shaft 120, the method may further include generating a first control signal C1 using the processing circuit 110, the first control signal C1 being configured to cause the actuator 170 of the reel section 100 to remove the rewinding shaft 120 from the reel section. In some of these embodiments, the method may further include generating a second control signal C2, the second control signal C2 being configured to cause the same actuator 170 or another actuator 190 of the reel section to replace the removed rewinding shaft with a new rewinding shaft from the rewinding shaft storage 101.

[0133] If no rewinding spindle performance parameters are found that meet the requirements indicating a performance fault of the rewinding spindle 120, the method may be repeated, as indicated by the dashed arrows from step 350 and also from step 340 back to step 300. The method may be performed for each rewinding spindle 120 that enters the detection range DR of one of the at least one detector 140.

[0134] The method may further include applying a marking to the rewinding spool prior to detecting the unique identification code associated with the rewinding spool from the marking.

[0135] In one or more embodiments, a weight value for each unique rewinding shaft 120 has been determined and stored in the memory 150 in association with the corresponding unique rewinding shaft. In these embodiments, the method may further include, for each of the at least one rewinding shaft 120: retrieving in the processing circuit 110 from the memory 150 the measured weight value of the identified rewinding shaft 120; determining, using the processing circuit 110, a desired nip load in the reel section 100 based on the weight of the identified rewinding shaft 120; and controlling, using the processing circuit 110, the nip load in the reel section 100 based on the desired nip load. Thus, the nip load is controlled to accommodate each unique rewinding shaft 120, which further improves nip control in the reel section 100. In this embodiment, controlling the nip load in the reel section based on the determined optimal nip load may include: generating, using the processing circuit 110, a nip load control signal, and controlling the nip load in one or more components of the reel section in response to the nip load control signal. Thus, one or more optimal nip loads are obtained when the identified rewinding shaft 120 is used in a rewinding cycle. In embodiments where the weight value of each unique rewinding shaft 120 has been determined and stored in the memory 150 in association with the corresponding unique rewinding shaft, the method may alternatively or additionally include, for each unique rewinding shaft 120 entering the weighing station 104 in the reel section 100, determining the total weight of the rewinding shaft 120 and the paper product P rewound thereon using a weighing instrument, the weighing instrument being arranged at the weighing station 104 and communicatively connected to the processing circuit 110. The method further includes: receiving or retrieving in the processing circuit 110 the total weight determined by the weighing instrument; receiving or retrieving in the processing circuit 110 the weight of the rewinding shaft 120 from the memory 150; and determining, using the processing circuit 110, the precise weight of the paper product P rewound on the rewinding shaft 120 by subtracting the retrieved weight of the rewinding shaft 120 from the determined total weight. Thus, a highly accurate determination of the weight of the paper product P rewound on the rewinding shaft 120 is obtained.

[0136] In order to further improve the monitoring of the performance of the rewinding shaft 120 by eliminating the false determination of a rewinding shaft failure caused by a faulty core 701, the method may further include: using at least one of the at least one detector 140 to detect a unique core identification code ID associated with the core from a core mark on the core mounted on the rewinding shaft 120 CORE And using the processing circuit 110 communicatively connected to the detector 140, based on the unique core identification code ID CORE wherein, also based on the stored or measured information about the performance of the core, using the processing circuit 110 to determine whether there is a fault in the performance of the identified rewinding shaft 120.

[0137] Other embodiments

[0138] In a third aspect, the present invention is also implemented by a papermaking machine comprising a monitoring system 200 according to any embodiment disclosed herein. It should be noted that the present invention can be used in any kind of papermaking machine, including but not limited to machines for making tissue paper.

[0139] In a fourth aspect, the present invention is also implemented by a computer program 227 that can be loaded into a non-volatile data carrier 225 that is communicatively connected to a processor 223 and by a non-volatile data carrier 225 containing the computer program 227, the computer program 227 including software for executing the method according to any embodiment presented herein when the computer program 227 is run on the processor 223.

[0140] It is to be noted that features from the various embodiments described herein may be combined freely, unless it is explicitly stated that such a combination is inappropriate.

Claims

1. A computer-implemented method for monitoring the performance of at least one rewinding shaft (120) in a reel section (100) of a paper machine, the reel section (100) being operatively connected to at least one detector (140), the at least one detector (140) being configured to detect a corresponding marking (130) on each rewinding shaft (120), the at least one detector (140) being positioned along a rewinding cycle of the at least one rewinding shaft (120), in, The method comprises, for each rewinding shaft (120): - using at least one of the at least one detector (140), detecting from a marking (130) on the rewinding shaft (120) a unique identification code ID associated with the rewinding shaft (120); - using a processing circuit (110) communicatively connected to a detector (140), identifying the rewinding shaft (120) based on the unique identification code ID; - using the processing circuit (110), determining at least one rewinding spool performance parameter of the identified rewinding spool (120) based on measurements from at least one sensor (160); as well as - using the processing circuit (110), determining whether there is a performance fault in the identified rewinding spindle (120) based on whether the determined at least one rewinding spindle performance parameter meets requirements indicating a performance fault in the rewinding spindle (120).

2. The method according to claim 1, wherein: Using the processing circuit (110) to identify the rewinding shaft (120) based on the unique identification code ID comprises: - receiving in the processing circuit (110) a detection signal (S, S', S") from the detector (140), the detection signal (S, S', S") indicating a detected unique identification code ID; - using the processing circuit (110) to compare the unique identification code ID with the unique identification code set ID stored in the memory (150) 1…n performing a comparison, wherein each unique identifier in the set of unique identifiers is stored in association with a corresponding unique rewinding spindle (120); and - if a match is found between the detected unique identification code ID and a unique identification code in the set of unique identification codes stored in the database: identifying the rewinding shaft (120) as having the matching unique identification code ID using the processing circuit (110) n The associated rewinding axis.

3. The method according to claim 1 or 2, wherein: Determining at least one rewinding spool performance parameter of the identified rewinding spool (120) includes using at least one sensor (160) configured to determine a parameter indicative of a performance of the rewinding spool (120).

4. The method according to claim 3, wherein: Determining at least one rewinding spindle performance parameter of the identified rewinding spindle (120) further comprises retrieving, by the processing circuit (110), at least one performance parameter from the memory (150).

5. A method according to any one of the preceding claims, wherein: The requirement indicating a performance failure of the rewinding spindle (120) includes the number of cycles executed by the rewinding spindle (120) being equal to or exceeding a preset maximum number of cycles, wherein the at least one rewinding spindle performance parameter determined comprises a number of cycles performed by the rewinding spindle (120), and If the determined number of cycles executed by the rewinding shaft (120) exceeds the preset maximum number of cycles, the processing circuit (110) is used to determine that there is a performance failure in the identified rewinding shaft (120).

6. A method according to any one of the preceding claims, wherein: The requirement indicating a performance failure of the rewinding shaft (120) includes the rewinding shaft (120) being out of balance, wherein determining, using the processing circuit (110) based on measurements from at least one sensor (160) at least one rewinding spool performance parameter of the identified rewinding spool (120) comprises: determining, based on one or more measurements from at least one vibration sensor, at least one vibration value indicative of vibrations in a component or part of the reel section caused by the rewinding spool (120), and Wherein, determining, using the processing circuit (110), that the performance of the identified rewinding spool (120) is faulty includes comparing each of the at least one vibration value to a corresponding vibration threshold value indicative of a highest allowable vibration value for a balanced rewinding spool (120).

7. A method according to any one of the preceding claims, wherein: The rewinding shaft (120) is a pneumatic mandrel, and the requirements indicating the performance failure include the rewinding shaft (120) having a valve leak, wherein determining, using the processing circuit (110) based on measurements from at least one sensor (160), at least one rewinding spool performance parameter of the identified rewinding spool (120) comprises: determining, using at least one pressure sensor, a pressure in the inflatable mandrel, and Wherein, using the processing circuit (110) to determine that the performance of the identified rewinding shaft (120) is faulty comprises: comparing the determined pressure with a preset reference pressure value of the rewinding shaft (120).

8. A method according to any one of the preceding claims, wherein: The requirement indicating a performance failure of the rewinding shaft (120) includes an unsuccessful rewinding ratio of the rewinding shaft (120) being equal to or exceeding a preset maximum unsuccessful rewinding ratio, wherein determining, using the processing circuit (110), at least one rewinding spindle performance parameter of the identified rewinding spindle (120) based on measurements from at least one sensor (160) comprises: determining a number of unsuccessful rewindings associated with the rewinding spindle (120), and comparing the number of unsuccessful rewindings to a total number of rewinding cycles performed by the rewinding spindle (120) to determine an unsuccessful rewinding ratio for the rewinding spindle (120), and Wherein, using the processing circuit (110) to determine whether the performance of the identified rewinding shaft (120) is faulty comprises: comparing the unsuccessful rewinding ratio of the rewinding shaft (120) with the preset maximum unsuccessful rewinding ratio.

9. The method according to any one of the preceding claims, further comprising, if it is determined that there is a fault in the performance of the rewinding shaft (120): - using the processing circuit (110) to generate a first control signal (C1) configured to cause an actuator (170) of the reeling section (100) to remove the rewinding shaft (120) from the reeling section.

10. The method according to claim 9, further comprising: A second control signal (C2) is generated, which is configured to cause the same or another actuator (170, 190) of the reel section to replace the removed rewinding spool with a new rewinding spool from a rewinding spool storage (101).

11. The method according to any one of the preceding claims, further comprising: The marking is applied to the rewinding spool prior to detecting a unique identification code associated with the rewinding spool from the marking.

12. A method according to any one of the preceding claims, wherein: For each unique rewinding shaft (120), a weight value of the unique rewinding shaft has been measured and stored in a memory (150) in association with the corresponding unique rewinding shaft, wherein the method further comprises, for each of the at least one rewinding shaft (120): - retrieving in the processing circuit (110) from the memory (150) the measured weight value of the identified rewinding shaft (120); - using the processing circuit (110) to determine a desired nip load in the reel section (100) based on the identified weight of the rewinding spool (120); and - using the processing circuit (110) to control the nip load in the web section (100) based on the desired nip load.

13. A method according to any one of the preceding claims, wherein: For each unique rewinding shaft (120), a weight value of the unique rewinding shaft has been measured and has been stored in a memory (150) in association with the corresponding unique rewinding shaft, wherein the method further comprises, for each of the at least one rewinding shaft (120) entering a weighing station (104) in the reel section (100): - determining the total weight of the rewinding shaft (120) and the paper product (P) rewound on the rewinding shaft (120) using a weighing instrument arranged at the weighing station (104) and communicatively connected to the processing circuit (110); - receiving or retrieving in the processing circuit (110) the total weight determined by the weighing instrument; - receiving or retrieving in the processing circuit (110) the weight of the rewinding shaft (120) from the memory (150); and - using said processing circuit (110), determining the precise weight of the paper product (P) rewound on said rewinding shaft (120) by subtracting the retrieved weight of said rewinding shaft (120) from the determined total weight.

14. The method according to any one of the preceding claims, further comprising: - using at least one of the at least one detector (140) to detect a unique core identification code ID associated with the core from a core marking on a core mounted on the rewinding shaft (120) CORE ; - using the processing circuit (110) communicatively connected to the detector (140), based on the unique chip identification code ID CORE identifying the core; The processing circuit (110) is also used to determine whether there is a fault in the performance of the identified rewinding shaft (120) based on stored or measured information about the performance of the core.

15. A system (200) for monitoring the performance of at least one rewinding shaft in a reel section (100) of a paper machine, the system (200) comprising: - at least one rewinding shaft (120), each rewinding shaft having a corresponding mark (130), the corresponding mark including information of a unique identification code ID associated with the rewinding shaft (120); - at least one detector (140) configured to detect the corresponding marking (130) on each rewinding shaft (120), wherein the at least one detector (140) is operatively connected to the reel section (100) and is positioned along the rewinding cycle of the at least one rewinding shaft (120); - at least one sensor (160) configured to determine a parameter indicative of the performance of the rewinding shaft (120); - a memory (150); and - a processing circuit (110) communicatively connected to the at least one detector (140), the at least one sensor (160) and the memory (150), Each of the at least one detector (140) is configured to: for each of the at least one rewinding shaft (120), detect a unique identification code (ID) associated with the rewinding shaft (120) from the corresponding mark (130) on the rewinding shaft (120); The processing circuit (110) is configured to, for each of the at least one rewinding shaft (120): Identifying the rewinding shaft (120) based on the unique identification code ID; determining at least one rewinding spindle performance parameter of the identified rewinding spindle (120) based on measurements from one or more of the at least one sensor (160); and Based on whether the determined at least one rewinding spindle performance parameter satisfies requirements indicating a performance failure of the rewinding spindle (120), it is determined whether a performance failure of the identified rewinding spindle (120) exists.

16. The system (200) of claim 15, wherein: The processing circuit (110) is configured to, for each of the at least one rewinding reel (120), identify the rewinding reel (120) based on the unique identification code ID in the following manner: - receiving a detection signal (S, S', S") from one of the at least one detector (140), the detection signal (S, S', S") indicating a detected unique identification code ID; - compare the unique identification code ID with the unique identification code set ID stored in the memory (150) 1…n comparing, wherein each unique identifier in the set of unique identifiers is stored in association with a corresponding unique rewinding shaft (120), and - If a match is found between said detected unique identification code ID and a unique identification code in a set of unique identification codes stored in a database: identifying said rewinding spindle (120) as the rewinding spindle associated with the matching unique identification code IDn.

17. The system (200) according to any one of claims 15 or 16, wherein: The processing circuit (110) is further configured to retrieve at least one performance parameter from the memory (150), and is further configured to determine, for each of the at least one rewinding spool (120), at least one rewinding spool performance parameter of the identified rewinding spool (120) based on the retrieved at least one performance parameter.

18. The system (200) according to any one of claims 15 to 17, wherein: The processing circuit (110) is configured to determine that there is a fault in the performance of the identified rewinding shaft (120) if the determined number of cycles performed by the rewinding shaft (120) in the paper winding section (100) exceeds a preset maximum number of cycles.

19. The system (200) according to any one of claims 15 to 18, wherein: The at least one sensor (160) comprises at least one vibration sensor, wherein the processing circuit (110) is configured to determine at least one vibration value indicative of vibrations in a component or part of the reel section (100) caused by the reeling spool (120) based on one or more measurements from the at least one vibration sensor, and wherein the processing circuit (110) is further configured to determine that there is a fault in the performance of the identified reeling spool (120) by comparing each of the at least one vibration value with a corresponding vibration threshold value indicative of a highest allowable vibration value for a balanced reeling spool (120).

20. The system (200) according to any one of claims 15 to 19, wherein: The rewinding shaft (120) is an air-filled mandrel, and the at least one sensor (160) includes at least one pressure sensor, the at least one pressure sensor being configured to measure the pressure in the air-filled mandrel and send the measured pressure value to the processing circuit (110), wherein the requirement indicating the performance fault comprises that the rewinding shaft (120) has a valve leak, and wherein the processing circuit (110) is configured to determine that there is a performance fault in the identified rewinding shaft (120) if the measured pressure value deviates from a reference pressure value of the inflatable mandrel by more than an allowable tolerance.

21. The system (200) according to any one of claims 15 to 20, wherein: The requirement indicating a performance failure of the rewinding shaft (120) includes an unsuccessful rewinding ratio of the rewinding shaft (120) being equal to or exceeding a preset maximum unsuccessful rewinding ratio, wherein the processing circuit (110) is configured to determine a number of unsuccessful roll-ups associated with the rewinding spindle (120), and compare the number of unsuccessful roll-ups with a total number of rewinding cycles performed by the rewinding spindle (120) to determine an unsuccessful roll-up ratio of the rewinding spindle (120); and The processing circuit (110) is further configured to determine that a performance failure of the identified rewinding shaft (120) exists if the unsuccessful rewinding ratio of the rewinding shaft (120) is equal to or exceeds the preset maximum unsuccessful rewinding ratio.

22. The system (200) according to any one of claims 15 to 21, wherein: If it is determined that there is a performance failure of the rewinding shaft (120), the processing circuit (110) is configured to generate a first control signal (C1) configured to cause an actuator (170) of the paper reeling section (100) to remove the rewinding shaft (120) from the paper reeling section.

23. The system (200) of claim 22, wherein: The processing circuit (110) is configured to generate a second control signal (C2) configured to cause the same or another actuator (170, 190) of the reel section to replace a removed rewinding spool with a new rewinding spool from a rewinding spool storage (101).

24. The system (200) according to any one of claims 15 to 23, wherein: For each unique rewinding shaft (120), a weight value of the unique rewinding shaft has been measured and stored in the memory (150) in association with the corresponding unique rewinding shaft, wherein the processing circuit (110) is further configured to: - retrieving the weight of said identified rewinding spool (120) from said memory (150); - determining a desired nip load in the reel section (100) based on the identified weight of the rewinding spool (120); and - controlling the nip load in the web section (100) based on the desired nip load.

25. The system (200) according to any one of claims 15 to 24, wherein for each unique rewinding shaft (120), a weight value of the unique rewinding shaft has been measured and stored in the memory (150) in association with the corresponding unique rewinding shaft, The system (200) further comprises: a weighing instrument arranged at the weighing station (104) and connected in communication with the processing circuit (110) and configured to determine the total weight of the rewinding shaft (120) and the paper product (P) rewound on the rewinding shaft (120) when the rewinding shaft (120) is located in the weighing station (104) in the paper reeling section (100), Wherein, the processing circuit (110) is further configured to: - receiving or retrieving in the processing circuit (110) the determined total weight from the weighing instrument; - receiving or retrieving the weight of the rewinding shaft (120) from the memory (150); and - determining the exact weight of the paper product (P) rewound on said rewinding shaft (120) by subtracting the retrieved weight of said rewinding shaft (120) from said determined total weight.

26. The system (200) according to any one of claims 15 to 25, wherein: The system (200) is configured to perform monitoring of the performance of the at least one rewinding spindle (120) for each rewinding spindle (120) that enters a detection range (DR) of one of the at least one detector (140).

27. The system (200) according to any one of claims 15 to 26, wherein: At least one of the at least one detector (140) is further configured to detect a unique core identification code (ID) associated with the core from a core marking on a core mounted on the rewinding shaft (120). CORE , wherein the processing circuit (110) is further configured to: CORE The core is identified and further based on stored or measured information about the performance of the core, it is determined whether there is a fault in the performance of the identified rewinding spool (120).

28. A papermaking machine comprising a monitoring system (200) according to any one of claims 15 to 27.

29. A computer program (227) loadable into a non-volatile data carrier (225) communicatively connected to a processor (223), the computer program (227) comprising software for executing a method according to any one of claims 1 to 14 when the computer program (227) is run on the processor (223).

30. A non-volatile data carrier (225) comprising a computer program (227) according to claim 29.

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