EP4422858A1 - Procédé et dispositif de surveillance de l'état d'une bande, presse continue pour la fabrication de panneaux de matériau et produit programme d'ordinateur - Google Patents

Procédé et dispositif de surveillance de l'état d'une bande, presse continue pour la fabrication de panneaux de matériau et produit programme d'ordinateur

Info

Publication number
EP4422858A1
EP4422858A1 EP22803265.2A EP22803265A EP4422858A1 EP 4422858 A1 EP4422858 A1 EP 4422858A1 EP 22803265 A EP22803265 A EP 22803265A EP 4422858 A1 EP4422858 A1 EP 4422858A1
Authority
EP
European Patent Office
Prior art keywords
sensor
section
strip
belt
deviation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22803265.2A
Other languages
German (de)
English (en)
Inventor
Jürgen WOLL
Jan BÄR
Stefan GOTTSTEIN
Joshua LOCHER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dieffenbacher GmbH Maschinen und Anlagenbau
Original Assignee
Dieffenbacher GmbH Maschinen und Anlagenbau
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dieffenbacher GmbH Maschinen und Anlagenbau filed Critical Dieffenbacher GmbH Maschinen und Anlagenbau
Publication of EP4422858A1 publication Critical patent/EP4422858A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/26—Program-control arrangements

Definitions

  • the invention relates to a method for condition monitoring according to the preamble of claim 1 and a device for condition monitoring according to the preamble of claim 16.
  • the invention also relates to a continuous press according to the preamble of claim 24 and a computer program product according to claim 25.
  • a mixture of particles or fibrous substances, to which a binding agent has been added is first spread onto a conveyor belt to form a grit mat.
  • This mat of grit is then fed to a continuous or discontinuous pressing operation, in which the mat of grit is pressed under pressure and/or heat to form a material panel.
  • the grit mat can be subjected to a pretreatment, for example by means of steam and/or electromagnetic radiation.
  • a pretreatment for example by means of steam and/or electromagnetic radiation.
  • wood-based panels such as chipboard, MDF panels (medium-density fibreboard) or OSB panels (oriented strand board) can be produced.
  • Compression usually takes place in a continuous press, in which the mat of grit is fed to the compression by means of a circulating flexible belt, in particular a steel belt.
  • a large number of press cylinders exert a pressure over the belt on the mat of grit.
  • the grit mat is heated, for example by means of heating plates.
  • Roller bars are usually arranged between the belt and the press cylinders to reduce friction and to transfer pressure. Both the belt and the roller bars are guided over deflection cylinders and driven by drive rollers in circulating operation.
  • the belt is flexible in that it can be deflected over rollers.
  • the process of pressing the grit mat into a material panel or a material panel strand and the condition of the press have a significant influence on the quality of the material panel produced.
  • the press for example, it is known that the status of individual components is monitored.
  • DE 10 2017 110 301 A1 also discloses a monitoring device for at least one component of a roller rod carpet of a continuous press, in which a section of the roller rod carpet is recorded and this recording is made in a control and/or evaluation device for deviations from a target state is checked. A component of a continuous press is thus monitored, which, however, is not in direct contact with the material to be pressed.
  • the surface side of the band that is in direct contact with the material to be pressed during the pressing process of the mat of material to be pressed into a material panel is of particular importance.
  • unevenness in and/or on the strip can be transferred to the surface of the material panel, which in turn influences its quality. In the case of thin material panels in particular, this can mean that the material panel produced can no longer be used due to surface defects.
  • rejects or reduced quality can be produced over a longer period of time, since damage in and/or on the strip directly affects the surface quality of the material panel.
  • the late detection of damage to the belt can lead to the belt having to be replaced.
  • a steel strip is used as the strip, the replacement of which is associated with high costs.
  • the steel strips have a long delivery time and are usually not available in stock, so that there is a risk of the press coming to a standstill and thus a loss of production.
  • the method according to the invention is designed in particular to be carried out by means of a device according to the invention or a preferred embodiment thereof.
  • the device according to the invention is designed in particular to carry out a method according to the invention or a preferred embodiment thereof.
  • One solution is provided by a method for monitoring the condition of at least one endlessly circulating belt, in particular in a continuous press in the course of the production of material panels, with one surface side of the belt as the contact side preferably being in direct contact with a material, in particular a pressed material mat, in particular at least in sections, at least one section of a surface of the strip, in particular the contact side, being detected with at least one sensor and sensor data determined for the section being transmitted to an evaluation unit.
  • deviations can be quickly detected and their influence can be determined by monitoring a surface of the strip, in particular the contact side.
  • the classification using a classification algorithm enables a quick assignment of the determined deviation to a specific classification. Based on this, further measures or decisions can be derived from the classification of the deviation and/or the section image with the deviation.
  • the section is an area of the band and can preferably extend over the entire width of the band, alternatively only represent a partial area of the band.
  • the section can in particular be the area of a strip which the at least one sensor can detect during a recording.
  • the section can be identical to a detection area of the sensor.
  • An abnormality may be an unusual condition of the strap, such as a dent, bulge, scratch, crack, dirt and/or a change in the structure of the strap.
  • a deviation can also be a change in a section compared to a previous point in time, for example a discoloration.
  • the normal state corresponds to the state of the tape that it should normally have at a certain point in time.
  • this can be the new condition or a condition after the strip has been run in, in particular in the continuous press.
  • the strap can also show signs of wear, for example a change in colour.
  • signs of use do not necessarily lead to a change from the normal condition, provided that the change is normal for the strap and, in particular, has no influence on the quality of the material with which the strap is in contact with its contact side.
  • the section image created from the sensor data in the evaluation unit is preferably a graphical representation of the determined sensor data.
  • This can be, for example, a condition index, a curve diagram, a contour line diagram, a heat map or a curve that has been transformed from the sensor data and is created from the determined sensor data.
  • the section image can also be a direct recording of the section, a 3D recording of the section or a representation of the section of the strip derived therefrom.
  • the section image can also be a representation formed from two or more images, in particular recorded synchronously, with the individual images preferably being combined or offset to form a 3D image.
  • the section image can be a one-dimensional, two-dimensional or three-dimensional image.
  • a one-dimensional image can be a line, for example, a two-dimensional image can be formed by a surface and a three-dimensional image can be formed by a surface with a corresponding topography.
  • condition of the band In the case of the condition of the band to be determined, it can initially only be a matter of determining whether there is no deviation or a deviation in the band, with the condition of the band being special also the classification of the deviation is taken into account.
  • condition of the tape can also be more extensive. The determination of the condition can also be based on whether use is still possible or whether an exchange appears necessary.
  • condition of the tape can also relate to a prognosis for further use of the tape.
  • the endlessly circulating belt is preferably guided around deflection means, in particular around deflection drums and/or deflection rollers.
  • the sensor data of the surface of the strip is recorded during the movement of the strip around the deflection means, in particular during production operation.
  • the deflection means are preferably deflection rollers or deflection drums.
  • the deflection means can in particular be fixed.
  • At least one deflection means is preferably mounted in a displaceable manner in order, for example, to adjust a tension of the endlessly circulating belt as it moves around the deflection means.
  • At least one deflection means is preferably driven. In particular in the case of a continuous press with an upper and a lower endlessly circulating belt, both belts can be driven via deflection means, the belts and/or the driven deflection means preferably being synchronized with one another.
  • further sensor data for the section is recorded with at least one further sensor and/or assigned to it.
  • the additional sensor data can in particular also be used to create the section image.
  • the additional sensor allows the data situation for the section to be improved by additional sensor data, as a result of which the section image becomes more precise and detailed in order to detect even the smallest deviations, for example.
  • the additional data can be, for example, the speed of the strip, the temperature of the strip, the thickness and/or the vibration of the strip. An indication of the length and/or location of the tape, in particular in relation to a reference marking, is also conceivable.
  • the additional sensor data can be directly related to a potential deviation or, preferably, be indirectly relevant for determining a deviation or its classification.
  • the further sensor data can also be, for example, a particularly time-consuming but precise measurement of a section, which is carried out on the section automatically or manually, in particular during a cleaning stop.
  • further information about the strip can be recorded, from which conclusions can be drawn, for example, about the origin and propagation of deviations.
  • the belt preferably moves at a speed of 500 mm/s to 3500 mm/s, in particular at a speed of 1000 mm/s to 3000 mm/s.
  • the at least one sensor is preferably mounted in a stationary manner or arranged so that it can move. Stationary storage of the at least one sensor is possible, for example, if the sensor can detect the entire bandwidth. In the case of one or more movably arranged sensors, these can in particular move transversely to a direction of belt travel, with and/or counter to the direction of belt travel. A movement of the at least one sensor can preferably take place during, before and/or after the acquisition of sensor data. Movable sensors increase the flexibility in the acquisition of sensor data and, for example, also enable the acquisition of sensor data over very wide bands. For example, a longer focusing on a specific section can also be done by a sensor that moves along with it.
  • Position information of the section and/or the sensor position and/or the sensor movement is particularly preferably recorded by the sensor and/or via the recording, which are part of the sensor data or linked to the sensor data and transmitted to the evaluation unit.
  • the positioning of a movable sensor can be determined precisely, as a result of which a precise assignment and classification of the section image is possible.
  • a preferred embodiment is characterized in that the at least one sensor and/or the at least one additional sensor is formed by an optical sensor, preferably a camera, in particular an area camera, a line camera and/or a 3D camera.
  • an optical sensor preferably a camera, in particular an area camera, a line camera and/or a 3D camera.
  • the surface of the band, in particular the contact side, recorded directly and in the Evaluation unit can be used for the analysis.
  • the section image preferably corresponds to the recording of the optical sensor.
  • 3D camera spatial information can also be recorded and thus a three-dimensional section image can be generated.
  • the at least one sensor and/or the at least one further sensor is formed by a non-optical sensor, in particular by a thermal sensor, ultrasonic sensor, distance sensor and/or an eddy current sensor.
  • a non-optical sensor reduces or even completely eliminates the influence of optical effects on the strip, such as reflections or discolouration, when recording the sensor data.
  • the at least one sensor and/or the at least one further sensor is formed by a combination of an optical and a non-optical sensor, in particular by a thermographic sensor.
  • this enables a graphical representation of the section of the strip, paired with additional information, for example the temperature, as a result of which deviations can be recognized even more quickly and better.
  • the sensor data from an optical sensor and/or a plurality of optical sensors and a non-optical sensor are combined in the evaluation unit.
  • a preferred embodiment of the method is characterized in that the at least one section and/or the deviation of a strip position is assigned via referencing, with at least one reference marking on the strip being detected by the sensor and/or the additional sensor for the referencing.
  • the strip position is preferably determined using a referencing method, which includes, for example, a speed, an acceleration, a length and/or a temperature of the strip.
  • measurement data from the controller flow into the referencing method, in particular measurement data from displacement sensors along a belt path of the circulating belt and/or from motors for driving the belt.
  • a number of reference markings along the endlessly circulating belt can preferably be used for referencing.
  • the further reference markings can be arranged at regular or irregular intervals or patterns. This improves the accuracy in determining the tape position.
  • the reference marking can preferably be an independent marking on the tape, for example a color marking or a deliberate change in the surface of the tape.
  • the reference marking can be formed on the contact side of the strip as well as on the surface side of the strip facing away from the contact side.
  • the reference marking can be a welded seam of a steel strip.
  • a reference marking can also be determined by a deviation, in particular the deviation that was determined first.
  • the section of the strip or a determined deviation can be clearly assigned to a position on the strip by the referencing. This makes it possible, for example, to find the section faster in the event of a standstill in order to repair it and/or examine it in more detail.
  • the belt positions of sections and/or deviations can be determined by calculation using the referencing method.
  • a mathematical determination has the advantage that factors such as elongation of the strip due to temperature influences or stress can also be included in the determination of the strip position, with which an exact strip position can be determined at any time and in any condition of the strip.
  • the mean temperature of the strip is preferably determined over at least one strip section and/or over a partial or complete strip revolution.
  • the deflection means are preferably used to determine the position of the strip.
  • a preferred embodiment is characterized in that in a first step a first, one-dimensional or two-dimensional section image is created for the section and in a second step the image created in the first step is averaged section, a second, three-dimensional section image is created by means of the sensor and/or the additional sensor, in particular when a deviation is detected in the first section image.
  • recordings can be generated or created quickly and easily, which can then be analyzed more precisely in a second step, in particular if a deviation is detected.
  • At least one section of an edge of the strip is preferably detected by means of the at least one sensor and analyzed for deviations.
  • Significant changes and/or deviations from a normal state can also occur at the edges of the strip in particular, since these changes and/or deviations are increasingly exposed to external influences.
  • an edge also represents part of the surface of the tape.
  • an analysis for deviations is preferably carried out by means of an image evaluation and/or an analysis algorithm.
  • the image evaluation preferably takes place by means of edge recognition, pattern recognition, pixel comparison, length and/or width measurement of features, image transformation and/or RGB/gray scale.
  • the analysis algorithm is preferably formed by a neural network, in particular an auto-encoder or Kohonen network (self-organizing map), and/or by a method of unsupervised learning. Using the analysis algorithm, deviations in the strip can be detected more quickly and even the smallest deviations can be detected.
  • aging of the strip is preferably taken into account in the analysis and/or the normal state. As a result, errors in the determination of deviations can be avoided and deviations can be distinguished from normal signs of use.
  • a preferred embodiment is characterized in that the classification algorithm in method step C) is based on an image evaluation and/or is created on the basis of machine learning, in particular deep learning.
  • the machine learning is preferably based on at least one of the following methods: support vector machine, gradient boosting tree, random forest, Decision Tree, K-Nearest Neighbor, Naive Bayes Regression, Neural Network, Convolutional Neural Network, Residual Network, Recurrent Neural Network and/or Bayesian Neural Network.
  • the at least one deviation and/or the section image can in particular be classified more quickly. A large number of potential deviations can be assigned quickly and reliably using a classification algorithm based on machine learning.
  • a further preferred embodiment is characterized in that the state in method step D) is determined by means of an image evaluation and/or by means of a state algorithm, the state algorithm being created on the basis of machine learning, in particular deep learning.
  • the state algorithm is preferably based on at least one of the following methods: Support Vector Regression, K-Nearest Neighbor Regression, Random Forest Regression, Decision Tree Regression, Naive Bayes Regression, Neural Network, Residual Network, Recurrent Neural Network and/or Bayesian Neural Network .
  • the state of the belt can be determined more quickly and reliably by means of a state algorithm based on machine learning.
  • the status algorithm preferably depends on the classification of the deviation and/or the section image and can, for example, determine the crack size and/or propagation speed of the deviation and/or an expected remaining service life of the strip.
  • the classification algorithm and/or status algorithm preferably allows at least one parameter of the deviation to be determined, in particular a scope, an extension, a depth and/or a size of the deviation.
  • the determination of the state in method step D) is based on the combination of data on the deviation and/or the section image with the classification of the deviation and/or the section image.
  • the at least one section image is stored with the associated, in particular determined, belt position in the evaluation unit and/or transferred to a database and stored.
  • the section image can be free of a deviation or contain a deviation, with the determined state being stored in particular for a section image with a deviation and/or transmitted to the database and stored.
  • the database can be a local database, but it can also be a central database which is provided, for example, by a manufacturer of the condition monitoring device.
  • the database enables access to the section image with the deviation at any time, in particular to the associated classification of the deviation.
  • An image, in particular a complete image, of the strip is preferably created from the section images in the evaluation unit. This enables the location and classification of deviations to be viewed across the entire band.
  • the image can also be used to analyze the condition of the entire belt. In this way, the individual deviations can be quickly found and further analyzed and/or repaired, particularly during a standstill in production.
  • the image of the tape is visualized on a display.
  • the display can be a screen in a control center.
  • the display is preferably also a mobile terminal device.
  • the determined deviations and/or the section image, their classification and/or the determined state, in particular with the corresponding sensor data, are transferred and stored as new data sets in a deviation database.
  • the deviation database can in particular be a central deviation database which is provided, for example, by a manufacturer of the device for status monitoring. By transmitting and storing the relevant data, for example, systematic deviations can be recognized and corrected accordingly.
  • a preferred embodiment of the method is characterized in that in a method step E) sensor data is created for the strip position of the at least one deviation in a predetermined cycle and method steps A) to D) are carried out, with method step D) preferably also including a comparison with at least flows into a stored section image of the belt position. The deviation is thus followed up in order to observe its evolution, this evolution being able to be taken into account in particular in the state of the strip.
  • the analysis algorithm and/or the classification algorithm and/or the status algorithm are preferably trained in advance and/or during operation using training data from a training database. Training using training data sets enables the corresponding algorithms to be formed, so that their reliability in determining deviations and/or the classification and/or the state is ensured from the start.
  • the training database preferably includes data records from the deviation database, in particular the deviation database corresponds to the training database.
  • the analysis algorithm is preferably trained with training data which are free of deviations.
  • the training data therefore only contain those data sets which represent a defect-free band.
  • Such training data allows deviations in the section image to be recognized even more quickly.
  • the training data preferably also includes data sets which have a defect-free band with aging, which in particular should not be regarded as deviations.
  • Training with training data without deviations for an analysis algorithm based on auto-encoder is particularly preferred. This enables an effective and quick detection of deviations.
  • the section images are normalized in the evaluation unit, in particular to a reference or a reference value. This enables a better comparison of the individual section images, in particular from different belts and/or presses and/or at different points in time.
  • the training data are also particularly preferably normalized, in particular in relation to a reference or a reference value.
  • the analysis of the preferably normalized section images is improved and deviations can be established and ascertained more easily.
  • parameters of the analysis algorithm and/or the classification algorithm and/or the status algorithm are loaded from a parameter database. Loading parameters from a parameter database can improve the results of the algorithms, especially when beginning to monitor the band.
  • the database, the training database, the deviation database and/or the parameter database are preferably central databases to which data flows after release or automatically and/or from which data is retrieved after release or automatically. There is preferably also the possibility of accessing these databases from a large number of devices.
  • the analysis algorithm, the classification algorithm and/or the status algorithm can preferably be stored in the evaluation unit and/or be retrievable.
  • the analysis algorithm, the classification algorithm and/or the status algorithm can also be stored and/or retrievable in different units of the evaluation unit, with each unit preferably being designed to be separately controllable.
  • individual sections of the tape and/or the entire tape are recorded continuously or in cycles or triggered by an event, for example an already determined deviation at a specific tape position.
  • the status of the strip can be continuously monitored so that deviations can be detected quickly and preferably also the origin can be traced.
  • Individual sections are preferably recorded within specific time intervals, preferably continuously at specific time intervals. This means that recordings are constantly being made, which means that a complete image of the tape can be created over a period of time.
  • continuous monitoring of the tape is done in an efficient manner, since sectional images are not constantly taken from the complete tape.
  • the creation of recordings is preferably controlled in such a way that section images are recorded temporarily at predetermined points in time. Recordings can thus be made at a specific point in time, in particular over a specific area of the tape, and can be triggered in particular as a function of external factors.
  • the section images are preferably created from the individual images of a video recording, in particular the video frames.
  • an unambiguous, in particular non-distorted, section image of the tape can thus be created.
  • the section with the at least one sensor and/or the at least one further sensor is preferably recorded from different angles relative to the strip. By taking pictures from different angles, reflection effects can be used to show deviations more clearly.
  • the at least one sensor and/or the at least one additional sensor is/are preferably arranged at a fixed distance from the belt.
  • the distance between the at least one sensor and/or the at least one further sensor and the strip is preferably varied or changed. By changing the distance, the smallest details, in particular deviations in the strip, can be detected more precisely by the sensor, for example if a deviation was already detected in a previous cycle.
  • reference is preferably made to a sensor position and/or sensor movement.
  • the section is preferably recorded by the at least one sensor directly on the strip.
  • the sensor is thus arranged in the immediate vicinity of the strip and can directly detect properties of the strip, for example its temperature.
  • the section can be recorded indirectly by the at least one sensor via deflection devices, in particular mirrors.
  • deflection devices in particular mirrors.
  • a preferred embodiment is characterized in that the section and/or the strip is/are illuminated with at least one illuminant in an effective area of the sensor upon detection by the sensor, at intervals or continuously.
  • the at least one illuminant generates a planar illumination, in particular a dark field or bright field illumination.
  • changes in the strip, in particular when using an optical sensor can be displayed even more clearly.
  • the effective range of the sensor essentially corresponds in particular to the direct detection range of the sensor.
  • Illumination preferably takes place by means of polarized light and/or diffuse light, in particular room light, and/or infrared light.
  • the at least one illuminant is formed by at least one LED and/or xenon light is used for illumination.
  • the illuminant is preferably operated in a flash mode.
  • the lighting for the recording preferably takes place from different angles.
  • contours, in particular deviations in the strip become clearer and can be better detected by means of the at least one sensor.
  • a pattern is preferably projected onto the strip surface by means of the illuminant. The pattern allows deviations in the band to be determined easily and quickly by changing the pattern through the corresponding deviation in the band.
  • the pattern can also be a line or a grid.
  • the section images, in particular with a deviation are stored with the associated belt position in the evaluation unit, with a comparison of section images of a belt position, which were created over a plurality of circulation cycles of the belt, preferably being carried out.
  • a development of the deviation can be determined, in particular a propagation speed of the deviation. This makes it possible to intervene early if the deviation develops further, in particular to avoid defects that cannot be remedied, which could lead to a belt replacement, for example.
  • the determined condition of the belt is preferably visualized on a display.
  • an operator always has an overview of the condition of the belt.
  • an alarm is issued in the event of a critical condition of the strip and the detected anomaly is visualized, for example also as a two-dimensional sectional image with appropriate emphasis or also as a three-dimensional sectional image.
  • An operator can thus intervene at an early stage in order, for example, to avoid greater damage as a result of further operation of the belt.
  • a device for monitoring the condition of an endlessly circulating belt in particular in a continuous press in the course of the production of material panels, the belt being guided around deflection means and one surface side of the belt being the contact side with a material in particular a pressed material mat, is in contact.
  • the device comprises at least one sensor for determining sensor data of at least one section of a surface of the strip, in particular the contact side, and a carrier system for the at least one sensor, as well as an evaluation unit, the evaluation unit being designed to receive the sensor data of the at least one sensor.
  • the evaluation unit is further designed to generate a sectional image from the sensor data, to analyze the generated sectional image for deviations, in particular compared to a normal state, and at least when at least one deviation is detected, the deviation and/or the sectional image by means of a classification algorithm to classify and determine a condition of the tape.
  • This classification can be used, for example, as a basis for predictions about the further operation of the line.
  • the device preferably comprises at least one additional sensor, in particular for acquiring additional sensor data for the section.
  • Further sensor data can be recorded by means of the further sensor.
  • these can relate to the surface of the strip, in particular the contact side of the strip, or they can record further data on the strip, such as the speed of the strip, the temperature of the strip, the thickness and/or the vibration of the strip.
  • the section image can include more detailed information or be displayed more precisely.
  • the occurrence of a deviation can preferably be determined on the basis of the additional sensor data.
  • the at least one sensor and the at least one further sensor are preferably arranged in a common sensor unit, which is preferably designed to be movable on the carrier system.
  • the at least one sensor and/or the at least one further sensor is an optical sensor, preferably a camera, in particular an area camera, a line camera and/or a 3D camera.
  • the section image corresponds to the camera image or an image calculated from the camera image or images. The section image can thus be analyzed directly for deviations in the evaluation unit.
  • depth information on the pixels is recorded in addition to the classic pixels, so that in addition to the optical image information there is also three-dimensional spatial information that can be evaluated together, in particular to correctly identify deviations and, if necessary, to be able to classify.
  • a 3D representation can also be made available to the operator if required for more precise evaluation.
  • a detection time for generating and creating the information for a 3D representation can be longer compared to a one-dimensional or two-dimensional image. It may therefore be necessary for a deviation to first be detected and localized using a one-dimensional or two-dimensional image and for the area of the deviation to be precisely recorded to generate the 3D representation, for example when the line is stopped for cleaning or another standstill.
  • the optical sensor can be moved parallel to the belt over a corresponding period of time to detect the area of the deviation to generate the 3D representation.
  • the at least one sensor and/or the at least one further sensor is a non-optical sensor, in particular a thermal sensor, ultrasonic sensor, distance sensor and/or an eddy current sensor.
  • a non-optical sensor By capturing sensor data or other sensor data with a non-optical sensor, optical influences on the strip, for example reflections or discolouration, have no or negligible effect on the determination of the sensor data.
  • the at least one sensor and/or the at least one further sensor is designed as a combination of optical and non-optical sensors, in particular as a thermographic sensor.
  • a preferred embodiment is characterized in that the device has a display for showing the tape and/or the condition of the tape and/or a device for outputting an alarm in the event of a critical condition of the tape bands included.
  • the condition of the strip can thus be displayed to an operator of the system at any time and deviations can be checked again by an operator on the basis of the section image.
  • the display of the band makes it easier to find deviations, so that they can be viewed more closely, for example, when the system is at a standstill.
  • the alarm can be used to draw the operator's attention to a serious deviation, for example to take or initiate immediate measures.
  • the evaluation unit is designed to assign the section images and/or deviations to a belt position by means of referencing.
  • the section images or deviations are clearly assigned through the referencing.
  • the device comprises a memory device which is designed to store section images, in particular section images with a deviation from the associated belt position.
  • a representation of the strip can be created from the section images, or, for example, deviations over several revolutions of the strip can be observed.
  • At least one light source for illuminating the belt is preferably arranged at least in an effective area of the at least one sensor, with the illumination being able to be switched on by means of a trigger, for example the acquisition of sensor data by the at least one sensor, or at intervals or being switched on permanently.
  • the at least one illuminant illuminates at least the effective area over an area, in particular with diffuse light and/or generates dark field or bright field illumination.
  • the at least one illuminant illuminates at least the effective area over an area, in particular with diffuse light and/or generates dark field or bright field illumination.
  • the at least one light source is designed to emit polarized and/or infrared light. This also enables a better determination of deviations in and/or on the strip.
  • the lighting means can preferably be operated in a flash mode.
  • the at least one illuminant is formed by at least one LED and/or a xenon lamp.
  • the at least one sensor and the at least one further sensor preferably form a sensor unit.
  • the sensor unit can also further include the at least one light source.
  • Another solution relates to a continuous press for the production of material panels, with at least one endlessly circulating belt, in particular in the form of a steel belt, which is guided around deflection means, with at least one deflection means being driven, and with the belt for transporting a material in the form of a pressed material for producing the material plate by the continuous press and a surface side of the belt which is in contact with the material to be pressed is formed as a contact side, the press comprising a condition monitoring device as set forth above or a preferred embodiment thereof.
  • the continuous press comprises an upper endless belt and a lower endless belt.
  • the belts are preferably driven by a driven deflection means in the upper strand and in the lower strand of the press.
  • the belts and/or the driven deflection means are synchronized with one another.
  • the deflection means are preferably deflection rollers and/or deflection drums.
  • the at least one circulating belt in particular the at least one belt in the continuous press, can preferably be a steel belt or a belt made of another material, in particular plastic and/or rubber.
  • the surfaces of the band can preferably be closed and/or gas-permeable surfaces.
  • the band can be perforated and/or punched.
  • the press for the upper belt and the lower belt each includes at least one sensor for determining sensor data of at least one section of the upper and lower belt.
  • the press can also be a pre-press, which is upstream of a press for the production of material panels or the like.
  • At least one sensor for determining sensor data for the upper and the lower band can also be arranged.
  • the at least one sensor, the at least one additional sensor and/or the at least one light source and/or the sensor unit is arranged in an area of an outlet and/or an inlet of the press.
  • the at least one sensor, the at least one additional sensor and/or the at least one illuminant and/or the sensor unit is arranged in a return of the strip.
  • Another solution relates to a computer program product with a computer-readable storage medium on which instructions are embedded which, when executed by an evaluation unit, cause the evaluation unit to be set up, a method for monitoring the condition of a tape as set out above, or a preferred embodiment thereof to be carried out, in particular with a device for condition monitoring as set out above or a preferred embodiment thereof, preferably in a continuous press as set out above.
  • Figure 1 is a schematic side view of a continuous
  • FIGS. 2a and 2b each show a section of a top view of an area surrounding a sensor
  • Figure 3 shows a section of a side view of an environment of a
  • FIG. 4 shows a schematic of the process sequence for a process for status monitoring using a device.
  • FIG. 1 shows a continuous press 1 for producing material panels from a material 18 .
  • the press 1 comprises an upper, endlessly circulating belt 2 and a lower, endlessly circulating belt 2, each in the form of a steel belt.
  • the belts 2 are guided around deflection means 3 in the form of deflection drums.
  • Each belt 2 is driven via a driven deflection means 3 in a press upper part 23 and in a press lower part 22 of the press 1, the belts 2 and/or the driven deflection means 3 being synchronized with one another.
  • the deflection means 3 in the upper press part 23 and in the lower press part 22 are driven in the area of an outlet 21 of the press 1 .
  • a material 18 in the form of an endlessly scattered pressing material mat is transported between the belts 2 from an inlet 20 to the outlet 21 of the press 1 and is processed in the press 1 to form a strand of material panels.
  • the belts 2 are each in contact with their contact side 4 with the pressed material mat.
  • individual material plates are created from the material plate strand by sawing, which are then stacked and fed to a store or to further processing.
  • the continuous press 1 has sensors 8 in the area of the outlet 21 as part of a device 7 for monitoring the condition of the strip 2 .
  • Both in the press upper part 23 and in the press lower part 22 are sensors 8 for determining sensor data 13 for a section of the strip 2 arranged.
  • the sensor data 13 is a recording of a section of the surface of the strip 2.
  • the section of the band 2 for which sensor data 13 is determined depends on the detection range of the sensor 8 .
  • the sensor 8 is designed in the form of a camera which can record a section across the entire width of the strip 2 .
  • a further sensor 9 can be arranged, as indicated by dashed lines in FIG.
  • the additional sensor 9 can differ from the sensor 8 in particular in the type of sensor or its sensor properties.
  • the sensor 9 can be designed as an eddy current sensor.
  • the additional sensor 9 increases the database of sensor data 13 for a section.
  • only one sensor 8 or only one further sensor 9 can be arranged between the press upper part 23 and the press lower part 22, which enables the determination of sensor data 13 for both belts 2.
  • this one sensor 8 or the one further sensor 9 can be designed to acquire sensor data 13 from only one band 2 or also from both bands 2 at the same time.
  • the sensors 8, 9 can alternatively or additionally also be in the area of the inlet 20 in the press 1 and/or in the return of the respective strip 2 be arranged in the press upper part 23 and in the press lower part 22, as shown by the dashed representation in FIG.
  • the arrangement of the sensors 8, 9 in the press upper part 23 and in the press lower part 22 can also preferably differ from one another. To improve the representation of FIG. 1, the active connection of these sensors 8, 9 to the evaluation unit 5 is not shown.
  • the determined sensor data 13 and/or referencing and/or position data of the sensor 8 and possibly of the further sensor 9 are transmitted to an evaluation unit 5, in which an evaluation is made from the determined sensor data 13.
  • sectional image 14 is created.
  • the image recorded by the camera corresponds at least essentially to the sectional image 14 created in the evaluation unit 5.
  • the image recorded by the camera in the evaluation unit 5 can still be processed to create the sectional image 14, for example to change the contrast the recording.
  • the section image 14 is also examined for deviations 12 in the evaluation unit 5 .
  • the deviation 12 is a matter of changes in the band 2 or the section of the band 2 compared to a normal state.
  • deviations 12 are dents, thickening, scratches, cracks, dirt in and/or on the band 2 and changes in the structure of the band 2.
  • changes compared to a previous state can represent deviations 12.
  • the deviation 12 and/or the section image 14 is classified by means of a classification algorithm in the evaluation unit 5 and finally a state of the strip 2 is determined.
  • Lamps 11 in the form of LEDs are also arranged in the area of the sensor 8 , which illuminate the strip 2 in the detection area of the sensor 8 .
  • the band 2 is illuminated as dark-field illumination, since this enables deviations 12 in the band 2 to be detected particularly well.
  • the sensors 8 and the further sensors 9 and the lighting means 11 are all arranged on a carrier system 10 at a distance 17 from the respective band 2 .
  • FIGS. 2a and 2b a section of a plan view of an area surrounding a sensor 8 is shown.
  • the sensor 8 is fastened to a carrier system 10 and is at a distance 17 from the surface side 4 of the strip 2 , in this case the contact side of the strip 2 .
  • a carrier system 10 Such an arrangement is found in particular in a return of the strip 2 of a continuous press 1, as shown in FIG.
  • the sensor 8 extends over the entire width of the strip 2, so that sensor data 13 can be recorded for the entire width of the strip 2.
  • Lamps 11 in the form of LEDs are also arranged on the carrier system 10 in order to illuminate the detection area of the sensor 8 .
  • another sensor 9 is also arranged on the carrier system 10 (not shown), which serves to determine the temperature of the strip 2 in the present case.
  • a deviation 12 on the surface side 4 of the band is shown as an example in FIGS. 2a and 2b.
  • the senor 8 in FIG. 2b is designed to be significantly narrower compared to the width of the strip 2 and only extends over a fraction of the width of the strip 2.
  • the sensor 8 is movable transversely to the belt running direction 16 and can thus be moved over the entire width of the belt 2.
  • the sensor 8 can also be arranged to be movable in and/or counter to the direction of travel 16 of the strip (not shown).
  • position data and/or referencing data of the sensor 8 or of the further sensor 9, in particular in the case of a movable sensor 8 or further sensor 9, are recorded and transmitted to the evaluation unit 5.
  • a reference marking 15 on the strip 2 is shown as an example in FIG.
  • a further sensor 9 is arranged on the carrier system 10 to detect the reference marking 15 .
  • the reference marking 15 can also be detected by the sensor 8 itself, as is the case in FIG. 2a.
  • the section images 14 or the deviations 12 are unambiguously assigned to a strip position by the reference marking 15 and a referencing method. This allows tracking, in particular the development of deviation 12, to be observed over a certain period of time.
  • FIG. 3 shows a section of a side view of the surroundings of sensor 8.
  • Sensor 8 which is designed as a camera, is arranged in a sensor unit 19 together with another sensor 9, which is designed as a thermal sensor for determining the temperature of strip 2.
  • the GE- The entire sensor unit 19 with the sensors 8 and 9 can be moved relative to the belt 2 .
  • the sensor unit can thus be moved towards and away from the strip 2, as is indicated by the vertical double arrow in FIG.
  • the movement of the sensor unit 19 relative to the strip 2 changes a distance 17 between the sensors 8, 9 and the strip 2, as a result of which more detailed recordings of a section of the strip 2 can be recorded with the sensor 8 designed as a camera. This allows precise recordings, in particular of deviations 12 in band 2, to be created.
  • the sensor unit 19 can also be movable transversely to the belt running direction 16, as has already been explained in FIG. 2b.
  • FIG. 4 shows the schematic sequence of the method for monitoring the condition of a strip 2 using a device 7 .
  • sensor data 13 for a section of the strip 2 are transmitted to the evaluation unit 5 by a sensor 8 , which is designed as an optical sensor in the form of a camera, and a further sensor 9 .
  • the sensor data 13 of the sensor 8 and of the sensor 9 are then combined in the evaluation unit 5 .
  • a section image 14 is created from the sensor data 13, which presently represents the recording of the section of the strip 2 by the camera.
  • the contrast of the recording or the colors of the recording of the sensor 8 can be changed in order to be able to show deviations 12 in the section image 14 better.
  • a curve is created from the sensor data 13 of the distance sensor, which curve then represents the section image 14.
  • the distance sensor is a sensor 8 which determines the distance 17 between belt 2 and the sensor 8 along a line. If there are deviations 12 in band 2 , this is reflected in a variation in the distance between band 2 and sensor 8 .
  • the section image 14 created in method step A is then examined in method step B for deviations 12, in particular with regard to depressions or elevations in or on the strip 2 and other changes.
  • genes such as discoloration or structural changes.
  • a normal state can be used to determine a deviation 12, which represents the usual state of the strip 2 at the respective point in time.
  • usual traces of use in volume 2 can be distinguished in the analysis for deviations 12.
  • the section image 14 and the deviation 12 are classified in method step C.
  • the section images 14 can also be classified permanently, so that each section image 14 created is classified.
  • the classification is carried out using a classification algorithm, which in the present case was developed on the basis of machine learning.
  • the classification algorithm was trained using data from a central training database and/or parameters of the classification algorithm were loaded from a parameter database.
  • the data or parameters come, for example, from other devices 7 for status monitoring and have been verified in advance and, in particular, standardized.
  • the algorithm already has a specific basic structure, which means that high data quality is achieved with the classification algorithm right from the start.
  • the condition of the tape 2 is determined and displayed to an operator via a display 6 .
  • the condition of the tape 2 can in particular be a specific statement about the further use of the tape 2. In particular, the statement can be that further use is possible, that maintenance work or an inspection must be carried out or that the tape 2 should be exchanged soon.
  • a complete image of the strip 2 is shown on the display 6, in which the individual deviations 12 are contained and marked. These can also be called up and viewed individually by the operator in order to take a detailed look at the deviation 12 or the section image 14 .
  • method steps A to D can be carried out for a section with a deviation 12 in a predetermined period of time and/or repeated at regular intervals.
  • sensor data 13 is determined by the sensors 8, 9 with each revolution of the belt 2, and a sectional image 14 is created, which is combined with the sectional image 14 of a previous revolution, which is stored in a memory of the device 7 is stored, is compared.
  • a development of the deviation 12 can be recorded over a longer period of time. If no further change in the deviation 12 was determined over several revolutions of the strip 2, the intervals between the determination of the sensor data 13 can be increased so that, for example, sensor data 13 for the specific deviation 12 is determined only every tenth revolution.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

L'invention concerne un procédé de surveillance de l'état d'au moins une bande à circulation continue (2), plus particulièrement dans une presse continue (1) au cours de la fabrication de panneaux de matériau, un côté plat (4) de la bande (2) étant en contact, de préférence directement en contact, en tant que côté de contact, avec un matériau (18), en particulier avec un tapis de matériau à presser, et au moins une partie d'une surface de la bande (2), en particulier du côté de contact, étant détectée au moyen d'au moins un capteur (8) et des données de capteur (13) acquises pour la partie étant transmises à une unité d'évaluation (5). Le procédé est caractérisé par les étapes de procédé suivantes consistant à : A) créer une image de partie (14) à partir des données de capteur acquises (13) pour la ou les parties dans l'unité d'évaluation (5) ; B) analyser l'image de partie (15) en recherchant des écarts (12), en particulier par rapport à un état normal ; C) au moins lorsqu'au moins un écart (12) est identifié, classifier l'écart (12) et/ou l'image de partie (14) au moyen d'un algorithme de classification ; et d) déterminer un état de la bande (2). L'invention concerne également un dispositif de surveillance d'état et une presse continue.
EP22803265.2A 2021-10-29 2022-10-19 Procédé et dispositif de surveillance de l'état d'une bande, presse continue pour la fabrication de panneaux de matériau et produit programme d'ordinateur Pending EP4422858A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021128383.3A DE102021128383A1 (de) 2021-10-29 2021-10-29 Verfahren und Vorrichtung zur Zustandsüberwachung eines Bandes, kontinuierliche Presse zur Herstellung von Werkstoffplatten und Computerprogrammprodukt
PCT/EP2022/079120 WO2023072706A1 (fr) 2021-10-29 2022-10-19 Procédé et dispositif de surveillance de l'état d'une bande, presse continue pour la fabrication de panneaux de matériau et produit programme d'ordinateur

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EP4422858A1 true EP4422858A1 (fr) 2024-09-04

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CN119038090B (zh) * 2024-11-01 2025-01-03 淮北合众机械设备有限公司 一种用于皮带输送机的智能清扫评估方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3292995A1 (fr) * 2016-09-07 2018-03-14 SWISS KRONO Tec AG Presse a chaud pour plaques en bois et son procede de fonctionnement
DE102019107152A1 (de) * 2019-03-20 2020-09-24 Siempelkamp Maschinen- Und Anlagenbau Gmbh Vorrichtung zur Überwachung des Schmierzustandes eines mit einem Schmiermittel beaufschlagten umlaufenden Bandes

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005024692A1 (de) * 2005-05-30 2006-12-07 Kaindl Flooring Gmbh Vorrichtung zur Herstellung eines Zwischenprodukts oder des Endprodukts der Fertigung von Platten auf Holzbasis
DE102016102931B4 (de) 2016-02-19 2018-09-20 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung und Verfahren zur Überwachung und/oder Regelung eines Schmierzustandes in einer kontinuierlich arbeitenden Presse
DE102017110301A1 (de) 2017-05-11 2018-11-15 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren zur Überwachung wenigstens einer Komponente eines Rollstangenteppichs einer kontinuierlich arbeitenden Presse, Überwachungsvorrichtung und kontinuierlich arbeitende Presse
EP3791236A4 (fr) * 2018-05-07 2022-06-08 Strong Force Iot Portfolio 2016, LLC Procédés et systèmes de collecte, d'apprentissage et de diffusion en continu de signaux de machine à des fins d'analyse et de maintenance à l'aide de l'internet des objets industriel
JP6885911B2 (ja) * 2018-10-16 2021-06-16 アイダエンジニアリング株式会社 プレス機械及びプレス機械の異常監視方法
DE102018010014A1 (de) 2018-12-31 2020-07-02 Siempelkamp Maschinen- Und Anlagenbau Gmbh Vorrichtung und Verfahren zur Überwachung eines Schmierzustandes eines umlaufenden Bandes zum Transport von Pressgut, sowie kontinuierlich betreibbare Presse
DE102019122699B4 (de) 2019-08-23 2025-01-16 Schuler Pressen Gmbh Umform- und/oder Trennvorrichtung und Verfahren zum Betreiben der Umform- und/oder Trennvorrichtung
DE102020000570A1 (de) 2020-01-29 2021-07-29 Siempelkamp Maschinen- Und Anlagenbau Gmbh Verfahren zur Überwachung eines Stahlbandes in einer kontinuierlichen Presse und kontinuierliche Presse

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3292995A1 (fr) * 2016-09-07 2018-03-14 SWISS KRONO Tec AG Presse a chaud pour plaques en bois et son procede de fonctionnement
DE102019107152A1 (de) * 2019-03-20 2020-09-24 Siempelkamp Maschinen- Und Anlagenbau Gmbh Vorrichtung zur Überwachung des Schmierzustandes eines mit einem Schmiermittel beaufschlagten umlaufenden Bandes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2023072706A1 *

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