DE102022108707A1 - Method and device for adjusting a shoe press roller - Google Patents

Abstract

The invention relates to a method for adjusting a shoe press roller (10), in particular a shoe press roller (10) for the mechanical dewatering of a fibrous web, such as paper, cardboard or tissue web, wherein the shoe press roller (10) has a pressure shoe (14) with a first Shoe edge (26) and a second shoe edge (26) opposite the first shoe edge (26) in the axial direction of the shoe press roller (10), as well as a flexible shoe press jacket (16), which surrounds the pressure shoe (14) and a fixed yoke (12). is rotatably mounted, the shoe press jacket (16) being held at its axial longitudinal ends by two disks (18, 20), which are mounted in a translationally displaceable manner relative to the fixed yoke (12) in the axial direction of the shoe press roller (10) by means of an adjusting device, whereby the Method comprises the following steps: - Image and/or video recording of the exterior of the shoe press roller (10) and transmission of the recording to a calculation unit; - Determination of a current actual value of the operating state by means of the calculation unit by image analysis of the image and/or video recording of the Exterior of the shoe press roller (10) and/or by recording values of embedded sensors; - based on the determined current actual value of the operating state: representation of meta information for setting the adjustment device by overlaying the image and/or video recording on a display ( 32).The invention also relates to a device for carrying out this method.

Description

The present invention relates to a method for adjusting a shoe press roller, in particular a shoe press roller for the mechanical dewatering of a fibrous web, such as paper, cardboard or tissue web, wherein the shoe press roller has a pressure shoe with a first shoe edge and one opposite the first shoe edge in the axial direction of the shoe press roller second shoe edge, as well as a flexible shoe press jacket, which is rotatably mounted around the pressure shoe and around a fixed yoke, the shoe press jacket being held at its axial longitudinal ends by two disks, which are mounted in a translationally displaceable manner relative to the fixed yoke in the axial direction of the shoe press roller by means of an adjusting device are. The invention further relates to a corresponding device for carrying out this method.

Machines for producing a fibrous web, in particular a paper, cardboard or tissue web, regularly have a so-called press section in which the fibrous web is dewatered by mechanical pressure. This press section is usually found between the forming and drying sections. A particularly efficient and gentle type of mechanical dewatering for the fibrous web can be achieved using a so-called shoe press. The fibrous web is usually guided together with a felt or between two felts through an extended press gap between a shoe press roller and a counter roller. The extended press gap is achieved by rotating a flexible shoe press jacket around a pressure shoe in the shoe press roller, the pressure shoe having a concave shape which is coordinated with the radius of the counter roller. Such shoe press rollers are sold by the applicant under the brand name “NipcoFlex” rollers and are, for example, in the publications DE102019104388A1 and DE102019104389 described in more detail.

The shoe press jacket is exposed to very high loads due to the pressure shoe, as it is not only stressed by the pressure in the press gap itself, but also constantly when rotating - viewed in the circumferential direction - in the entry and exit area of the press gap an alternating bending load between a convex and a concave deformation is exposed. However, the load on the shoe press jacket is greatest in the area of the axial longitudinal ends of the pressure shoe. Since the shoe press jacket is held at its own axial longitudinal ends by two circular disks and rotated by means of these, the shoe press jacket is subjected to a complex three-dimensional deformation in the area of the axial longitudinal ends of the pressure shoe. Due to this high load, material fatigue or even cracks in the shoe press jacket are often the first to appear.

In order to counteract this problem and extend the service life of the shoe press jacket, in practice the shoe press jacket is from time to time displaced a small distance relative to the pressure shoe in the axial direction. In this way, the same point - viewed in the axial direction of the shoe press jacket - is not constantly exposed to increased stress from the shoe press jacket, but rather the load is distributed over a larger area of the shoe press jacket. The shoe press roller therefore has an adjusting device for displacing the shoe press jacket in the axial direction relative to the pressure shoe.

However, it is not clear to the operator of the shoe press from the outside where exactly the edge of the shoe is in relation to the shoe press jacket. The condition is therefore corrected based on the operator's feeling and experience, but not based on the actual conditions in the shoe press roller, since the exact position of the pressure shoe cannot be seen. For safety reasons, it is not possible to take measurements while the machine is running.

Furthermore, it is sometimes difficult for the operator to estimate when it is time to move the shoe press jacket again and by what distance it should preferably be moved. Such an adjustment often requires the use of appropriately trained and experienced personnel. However, the use of these qualified specialists is costly. In addition, the availability of this staff represents a bottleneck factor.

It is the object of the present invention to solve or at least reduce the problem described above. Specifically, the operator should be offered simple assistance in quickly and reliably recognizing when and how far the shoe press jacket should be axially displaced relative to the pressure shoe in order to achieve the longest possible service life of the shoe press jacket.

This task is solved by the features of the independent claims. The dependent claims relate to advantageous developments of the present invention.

• - Bild- und/oder Videoaufnahme vom Äußeren der Schuhpresswalze und Übermittlung der Aufnahme an eine Berechnungseinheit;
• - Ermittlung eines aktuellen Ist-Wertes des Betriebszustands mittels der Berechnungseinheit durch Bildanalyse der Bild- und/oder Videoaufnahme vom Äußeren der Schuhpresswalze und/oder durch die Erfassung von Werten eingebetteter Sensorik;
• - auf Basis des ermittelten aktuellen Ist-Wertes des Betriebszustands: Darstellung von Metainformationen zum Einstellen der Verstelleinrichtung durch Überlagerung mit der Bild- und/oder Videoaufnahme auf einem Display.

Specifically, the present task is achieved according to claim 1 by a generic method solved in the manner described above, which also includes the following steps:

• - Image and/or video recording of the exterior of the shoe press roller and transmission of the recording to a calculation unit;
• - Determination of a current actual value of the operating state by means of the calculation unit by image analysis of the image and/or video recording of the outside of the shoe press roller and/or by recording values of embedded sensors;
• - based on the determined current actual value of the operating state: representation of meta information for setting the adjustment device by overlaying the image and/or video recording on a display.

In the patent application, which has not yet been published but is about to be granted DE 102021104870.2 The applicant has already described a method for making the internal, invisible sealing strips and format limiters visible in vacuumed rollers using so-called augmented reality (AR), and thus giving the operator valuable orientation when setting the strip positions. The inventors have recognized that the same principle can also be used advantageously to solve the present problem, namely in particular to make the position of the pressure shoe relative to the shoe press jacket visible from the outside. The proposed methods therefore include aspects of so-called augmented reality (AR).

In the reality-virtuality continuum (according to Paul Milgram et al., 1994), augmented reality (AR) and augmented virtuality are part of the so-called mixed reality. While the term augmented virtuality is rarely used by experts, augmented reality and mixed reality, and rarely enhanced reality, are usually used synonymously. In contrast to virtual reality, in which the user is completely immersed in a virtual world, the focus of augmented reality is on displaying additional information. For the visual modality, this leads to much tougher requirements for positioning (tracking) and calibration.

An AR system (ARS for short) is the system of technical components that are necessary to build an augmented reality application: camera, tracking devices, support software, etc.

• - die virtuelle Realität und die Realität sind miteinander kombiniert (teilweise überlagert);
• - Interaktivität in Echtzeit;
• - reale und virtuelle Objekte stehen dreidimensional zueinander in Bezug.

The literature mostly uses Azuma's definition of augmented reality (http://www.cs.unc.edu/~azuma/ARpresence.pdf):

• - virtual reality and reality are combined (partially superimposed);
• - Real-time interactivity;
• - Real and virtual objects relate to each other in three dimensions.

In an advantageous embodiment of the method, the actual position of the pressure shoe is determined and shown on the display as a virtual position using the image and/or video recording. With the help of the meta-information, the operator can assign optical changes to the shoe press jacket to the exact shoe edge position and carry out corresponding targeted changes, such as axially moving the shoe press jacket, even while the machine is running.

It can be provided that the actual value of the operating state is determined solely from the image or video recording of the shoe press roller.

Alternatively, it can also be provided that a marker element is attached to the outside of the component at a defined position and that this marker element is recorded during the image and/or video recording. In order to easily determine the actual position, it is proposed to attach at least one marker element to the outside of the shoe press roller, which is recorded during the image and/or video recording.

The marker element can be, for example, a specially shaped geometric object that is reliably recognized by the image analysis. Based on the position of the marker element, the actual value of the operating state, for example the exact positioning of the shoe press jacket relative to the pressure shoe, can then be determined. The marker element can either remain firmly attached to the respective component or can be constructed in such a way that the marker element can be easily removed. This means that it can be removed again after the shoe press roller has been adjusted and does not disturb the further operation of the machine. The marker element also does not become unnecessarily dirty, which may make detection more difficult and inaccurate. As a further advantage, the marker element cannot cause any damage if accidentally released.

In particular, at least two marker elements can be attached to the outside of the shoe press roller, which are recorded during the image and/or video recording, with a first marker element being firmly positioned relative to the yoke and a second marker element together with at least one of the two disks relative to the fixed yoke Axial direction of the shoe Press roller is mounted in a translationally displaceable manner by means of the adjusting device.

As described at the beginning, the shoe press jacket is mounted in the shoe press roller on a disc, so-called positioning discs, on the driver side and the drive side. These disks are connected radially on the inside to the yoke of the roller or the frame of the shoe press via a non-rotating coupling part. These positioning disks can be moved along the axis of the shoe press roller to position the press jacket. Usually one of the two positioning disks is designed as a tension disk in order to keep the shoe press jacket under a suitable pre-tension.

In a particularly advantageous embodiment, the second marker element is not rotatably mounted with the at least one disk around the yoke of the shoe press roller. Instead, the at least one second marker element can be attached to the non-rotating but translationally displaceable coupling part for the tension disk. The second marker element is therefore not exposed to centrifugal forces, as would be the case if it were attached directly to the rotating disk. The at least one first marker element, however, can be attached as a reference marker on a fixed part of the shoe press roller or chair. Since the position of the pressure shoe relative to the reference marker is constant and known, the current actual position of the pressure shoe relative to the shoe press jacket can be determined very easily from the relative position of the two markers to one another and shown as a virtual position on the display. In most cases, this can even happen without connecting the calculation unit to an external database system.

However, such a database system, to which the calculation unit has access to determine the meta information, is often advantageous. For example, the current actual value of the operating state can be stored in the database system. It is particularly advantageous if the shoe press or the shoe press roller has an ID tag, for example in the form of a QR code or an RFID chip. This ID identifier can advantageously be recorded with the same device with which the image or video is recorded. This can in particular be a smartphone, tablet or similar commercially available electronic end-user device. Further information can be read from the database system via the ID marking of the shoe press or shoe press roller and can also be used to determine the actual status.

It is also possible for the actual value of the operating state to be stored in the database system. ID marking is also advantageous for this.

The meta information that is shown on the display can be calculated by the calculation unit using either a stored algorithm or other suitable relationships.

Alternatively or additionally, previous actual values of the operating state can be stored as historical values in a database system. The meta information can then be provided by comparing it with the stored historical values.

To improve the quality of the meta information, it is also possible for the stored historical values to be corrected directly by a trained operator. If, when adjusting the shoe press roller, it turns out that the setting parameters specified via the meta information do not lead to the desired optimal result (which can happen, for example, due to wear or improperly carried out maintenance work), an experienced expert can manually make the optimal adjustment. Advantageously, the new optimal values can then be transferred from the calculation unit to the database system and stored there as a new standard. In this way, a learning system can be created without much effort, and even inexperienced operators can rely on the experts' current specialist knowledge.

Other operating parameters of the machine are preferably also stored in the database system, such as product information, production speed, raw material data, quality parameters, sensor data, etc. This means that the quality of the metadata can usually be significantly improved, since in many applications the optimal settings depend on these Operating parameters can be distinguished.

In the application of the present invention, the actual value preferably includes the relative axial position of the shoe press jacket relative to the fixed yoke or the pressure shoe, as well as preferably also an indication of the operating time, how long this relative axial position has already existed or how long it has existed. The calculation unit can therefore, for example, show on the display which areas of the shoe press casing have already been exposed to the increased load caused by the pressure shoe edge in the past and, if necessary, to what extent. For example, these areas could be the shoe pressman be marked in color, with the stress that has already occurred being made visible by the intensity of the color. For example, the state of the shoe press casing can be advantageously determined by means of the calculation unit, and recommendations for action for the translational displacement of the shoe press casing can be shown on the display depending on the determined state and the current relative axial position of the shoe press casing relative to the fixed yoke and/or the pressure shoe.

• - optische Mittel zum Aufnehmen von einem Bild- und/oder Video vom Äußeren der Schuhpresswalze;
• - eine Berechnungseinheit zum Empfangen der Bild- und/oder Videoaufnahme; zur Ermittlung eines aktuellen Ist-Wertes des Betriebszustands mittels durch Bildanalyse der Bild- und/oder Videoaufnahme vom Äußeren der Schuhpresswalze und/oder durch die Erfassung von Werten eingebetteter Sensorik; und zum Darstellen auf Basis des ermittelten aktuellen Ist-Wertes des Betriebszustands von Metainformationen zum Einstellen der Verstelleinrichtung durch Überlagerung mit der Bild- und/oder Videoaufnahme auf einem Display.

According to a further aspect of the present invention, the object is also achieved by a device for adjusting a shoe press roll, in particular a shoe press roll for the mechanical dewatering of a fibrous web, such as paper, cardboard or tissue web, comprising a shoe press roll which has a pressure shoe with a first shoe edge and a second shoe edge opposite the first shoe edge in the axial direction of the shoe press roller, as well as a flexible shoe press jacket, which is rotatably mounted around the pressure shoe and a fixed yoke, the shoe press jacket being held at its axial longitudinal ends by two disks, which are opposite the fixed yoke are mounted in a translationally displaceable manner in the axial direction of the shoe press roller by means of an adjusting device, the device further comprising:

• - optical means for capturing an image and/or video of the exterior of the shoe press roll;
• - a calculation unit for receiving the image and/or video recording; to determine a current actual value of the operating state by means of image analysis of the image and/or video recording of the outside of the shoe press roller and/or by recording values embedded in sensors; and for displaying, based on the determined current actual value of the operating state, meta information for setting the adjustment device by overlaying the image and/or video recording on a display.

The advantages of the device according to the invention correspond to those of the method according to the invention and vice versa. To avoid repetition, reference is therefore made to the above statements on the method according to the invention. In particular, the device according to the invention can be developed just as advantageously as described above for the method according to the invention.

• 1: eine Querschnittsdarstellung durch eine Schuhpresswalze; und
• 2: eine Berechnungseinheit mit einem Display zur Darstellung der aktuellen, axialen Ist-Position des Druckschuhrands relativ zum Schuhpressmantel.

The invention is explained below with reference to figures. The invention is not limited to these examples. The figures show in detail:

• 1 : a cross-sectional view through a shoe press roller; and
• 2 : a calculation unit with a display for displaying the current, axial actual position of the pressure shoe edge relative to the shoe press jacket.

1 shows a schematic cross-sectional view of a shoe press roller 10. Only the two longitudinal ends are shown along a longitudinal axis A of the shoe press roller 10, whereas a middle section is hidden. The shoe press roller 10 is part of a shoe press, not shown here, in a machine for producing a fibrous web. The shoe press roller 10 comprises a yoke 12 that is fixed relative to a frame of the machine. Attached to the yoke 12 is a so-called pressure shoe 14, which is shown hatched here and which has a concave curvature (curvature orthogonal to the image plane of the 1 ) in order to form an extended press gap with a counter roller of the shoe press, also not shown here. The counter roller, not shown, would be in 1 arranged below the shoe press roller 10. The yoke 12 is largely hollow and thus offers space for supply lines, in particular for lubricating oil lines and pressure lines for the pressure shoe 14.

A flexible shoe press jacket 16 is rotatably mounted around the yoke 12 with the pressure shoe 14. For this purpose, the shoe press jacket 16 is held at its two axial longitudinal ends by two disks 18, 20 which are rotatably mounted relative to the yoke. Since the two disks simultaneously position the shoe press jacket 16 in the axial direction, they are also referred to as positioning disks 18, 20. One of the two disks 18, 20 can exert a certain axial prestress on the shoe press jacket 16 via springs which are supported on the yoke 12, as shown in 1 on the right disk 20 is indicated. The rotatable storage is preferably carried out via rolling element bearings. The radially inner part of the rolling element bearings, which faces the yoke 12, is each connected to the yoke 12 via a coupling part 22. The coupling parts 22 therefore do not rotate with the disks 18, 20 and the shoe press jacket 16. However, the coupling parts 22 are arranged to be translationally displaceable relative to the yoke 12 in the direction of the longitudinal axis A by means of an adjusting device. This means that the two disks 18, 20 and the shoe press jacket 16 can also be moved in translation relative to the yoke 12. This is shown with the corresponding arrows in 1 indicated.

When the shoe press is used as intended, the greatest stress acts on the shoe press jacket 16 in the areas B, where the pressure shoe 14 has its axial ends, namely its shoe edges 26.

In practice, the adjusting device is therefore used to axially displace the shoe press jacket 16 relative to the pressure shoe 14 from time to time, so that the areas B of the greatest stress are not always the same on the shoe press jacket 16. This allows the service life of the shoe press jacket 16 to be extended. However, it is not clear to the operator from the outside where exactly the ends of the pressure shoe 14 lie inside the shoe press jacket. It also depends heavily on your experience to determine the right time and the right path length with which the shoe press jacket 16 is to be moved.

The present invention provides a remedy for these problems. This can be done using a commercially available electronic end-user device 24, such as a mobile phone or tablet, as shown in 2 is shown schematically, and a suitable software using augmented reality, the position of the two shoe edges 26 of the pressure shoe 14 inside the shoe press jacket 16 can be made easily understandable for the operator. In particular, the complete pressure shoe 14 can be placed in real time on the real image of the shoe press roller 10, which is recorded by the operator, whereby the shoe edges 26 can be particularly highlighted, for example by arrows, as in 2 shown schematically. For this purpose, the electronic end-user device 24 has a calculation unit, such as a CPU, and optical means, such as a camera, for recording an image and/or video of the exterior of the shoe press roller 10.

So that the software for generating and outputting the augmented reality can easily determine the current actual position of the pressure shoe 14, marker elements 28, 30 are preferably attached to the shoe press roller 10. In particular, first marker elements 28 and second marker elements 30 can be attached, for example two of each type, one on the guide side and one on the drive side of the shoe press roller 10, as in 1 shown. This ensures that the marker elements 28, 30 can always be clearly detected by the optical means, regardless of where the operator is currently located relative to the shoe press roller 10. In the exemplary embodiment shown, the first two marker elements 28 are each attached directly to the yoke 12 and are therefore stationary to it. The second marker elements 30, however, are each attached to the coupling parts 22. The second marker elements 30 thus follow the translational displacement of the shoe press casing 16 relative to the yoke 12, but not the rotational movement. The marker elements 28, 30 can, for example, be particularly shaped geometric bodies that can be reliably recognized by the image recognition software. If the distance between the first marker element 28 and the pressure shoe 14 is known to the calculation unit, it can also determine the current actual position of the pressure shoe 14 by determining the current actual position of the first marker element 28, since both are stationary in relation to each other via the yoke 12 are connected to each other. It is therefore possible for the calculation unit to show the current actual position of the shoe edges 26 relative to the shoe press jacket 16 to the operator on a display 32 in real time.

Preferably, the end-user electronic device 24 is connected to a database system. The database system can, for example, be stored directly in a memory belonging to the electronic end-user device 24, or it can be stored at another location and connected to the electronic end-user device 24, in particular via a wireless radio connection. Further information about the shoe press roller 10 or components thereof can be stored and accessed in the database system. In particular, old actual positions of the pressure shoe 14 relative to the shoe press jacket 16 can be stored, as well as information about the period of time during which this relative position existed during operation of the shoe press. From this, conclusions can be drawn as to how heavily which area of the shoe press jacket 16 has already been stressed and whether or when a further displacement of the shoe press jacket 16 should be carried out via the adjusting device and in which direction this should take place.

In 2 The wear that has already occurred on the shoe press jacket 16 is shown as an example using a bar chart. The larger the beam, the longer this section of the shoe press jacket 16 has been exposed to the increased loads in the area of the shoe edges 26 and the more this section has already worn. If the bar in the section of the current actual position of the shoe edge 26 exceeds a predetermined threshold value, the operator can be made aware of this separately and a recommendation can be given to him in which direction he should further move the shoe press jacket 16 and by what amount in which direction. This makes work easier for even inexperienced operators and helps to extend the life of shoe press jackets 16.

Reference symbol list

10

Shoe press roller

12

yoke

14

pressure shoe

16

Shoe press coat

18, 20

(Positioning) disks

22

coupling part

24

electronic end-user device

26

Shoe edges

28

first marker elements

30

second marker elements

32

display

A

Longitudinal axis

b

Areas of greatest stress

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102019104388 A1 [0002]
• DE 102019104389 [0002]
• DE 1020211048702 [0010]

Claims (10)

Method for adjusting a shoe press roll (10), in particular a shoe press roll (10) for the mechanical dewatering of a fibrous web, such as paper, cardboard or tissue web, wherein the shoe press roll (10) has a pressure shoe (14) with a first shoe edge (26) and a second shoe edge (26) opposite the first shoe edge (26) in the axial direction of the shoe press roller (10), as well as a flexible shoe press jacket (16), which is rotatably mounted around the pressure shoe (14) and around a fixed yoke (12), wherein the shoe press jacket (16) is held at its axial longitudinal ends by two disks (18, 20), which are mounted in a translationally displaceable manner relative to the fixed yoke (12) in the axial direction of the shoe press roller (10) by means of an adjusting device, characterized in that the method comprises the following steps: - image and/or video recording of the exterior of the shoe press roller (10) and transmission of the recording to a calculation unit; - Determination of a current actual value of the operating state by means of the calculation unit by image analysis of the image and/or video recording of the outside of the shoe press roller (10) and/or by recording values of embedded sensors; - based on the determined current actual value of the operating state: display of meta information for setting the adjustment device by overlaying the image and/or video recording on a display (32). Procedure according to Claim 1 , characterized in that at least one marker element (28, 30) is attached to the outside of the shoe press roller (10), and this marker element (28, 30) is recorded during the image and / or video recording. Procedure according to Claim 1 , characterized in that at least two marker elements (28, 30) are attached to the outside of the shoe press roller (10), which are also recorded during the image and / or video recording, a first marker element (28) being fixed relative to the yoke (12). is positioned and a second marker element (30) together with at least one of the two disks (18, 20) is mounted in a translationally displaceable manner relative to the fixed yoke (12) in the axial direction of the shoe press roller (10) by means of the adjusting device. Procedure according to Claim 3 , characterized in that the second marker element (20) is not rotatably mounted with the at least one disk (18, 20) around the yoke of the shoe press roller (10). Method according to one of the preceding claims, characterized in that a database system is provided and the calculation unit accesses the database system to determine the meta information. Procedure according to Claim 5 , characterized in that the current actual value of the operating state is or is stored in the database system. Procedure according to Claim 5 or 6 , characterized in that previous actual values of the operating state are or are stored in the database system as historical values. Procedure according to Claim 6 or 7 , characterized in that the actual value includes the relative axial position of the shoe press jacket (16) relative to the fixed yoke (12) and / or the pressure shoe (14), as well as preferably also an indication of the operating time, how long this relative axial position has already been exists or how long it has existed. Procedure according to Claim 8 , characterized in that the state of the shoe press jacket (16) is also determined by means of the calculation unit, and depending on the determined state and the current relative axial position of the shoe press jacket (16) relative to the fixed yoke (12) and / or the pressure shoe (14 ) Recommendations for action for the translational displacement of the shoe press casing (16) are shown on the display (32). Device for adjusting a shoe press roll (10), in particular a shoe press roll (10) for the mechanical dewatering of a fibrous web, such as paper, cardboard or tissue web, comprising a shoe press roll (10) which has a pressure shoe (14) with a first shoe edge ( 26) and a second shoe edge (26) opposite the first shoe edge (26) in the axial direction of the shoe press roller (10), as well as a flexible shoe press jacket (16), which is rotatably mounted around the pressure shoe (14) and around a fixed yoke (12). is, wherein the shoe press jacket (16) is held at its axial longitudinal ends by two disks (18, 20), which are mounted in a translationally displaceable manner relative to the fixed yoke (12) in the axial direction of the shoe press roller (10) by means of an adjusting device, characterized in that the device further comprises: - optical means for recording an image and/or video of the exterior of the shoe press roller (10); - a calculation unit for receiving the image and/or video recording; for determining a current actual value of the operating state by means of image analysis of the image and/or video recording of the outside of the shoe press roller (10) and/or by recording values of embedded sensors; and for displaying, based on the determined current actual value of the operating state, meta information for setting the adjustment device by overlaying the image and/or video recording on a display (32).

Images