EP2334454B1 - Arrangement and method for detecting an operational state of a strand guide - Google Patents

Description

Technical area

The invention relates to an arrangement and a method for detecting an operating state of a strand guide of a continuous casting plant, taking into account a bearing force monitoring according to the preamble of claim 1 and according to the preamble of claim 4.

State of the art

According to the prior art, occurring bearing forces in continuous casting over a defined, changed by force gap, which is introduced into the bearing bracket of the rollers of the continuous casting, measured and used to determine the Sumpfspitzenlage, see the earlier application with the file number DE 10 2008 014 524 A1 ,

In this case, the strand guide of a continuous casting plant with a plurality of segments or with a plurality of roles with respect to the respective bearing forces and their respective distribution is very complex, which means that a measurement of the bearing forces corresponding to the requirements is not carried out and Thus, an adjustment or adjustment of the bearing forces corresponding to the requirements can not be performed. This leads to a partially present overload of bearings or to increased wear, so that a unscheduled Failure of the plant leads to increased costs due to reduced productivity.

Presentation of the invention, object, solution, advantages

It is the object of the invention to provide an arrangement and a method for detecting an operating state, by means of which or by means of which monitoring and adjustment of the bearing forces, in particular a strand guide can be carried out in order to adjust the operating parameters optimally to the productivity of the system to increase and to increase the product quality of the products of the continuous casting plant.

This is achieved with the features of claim 1, whereby an arrangement is provided for detecting an operating condition of a strand guide of strand guide segments, in particular for a slab or thin slab plant, with at least one segment with rollers and / or partial rolls which are supported by bearings, wherein for monitoring of bearing forces and / or the temporal change of bearing forces on at least individual bearings transducers are arranged, wherein an evaluation unit is provided for detecting an operating condition, wherein the determined by the transducers data are forwarded to the evaluation unit for evaluation and / or signaling the operating state of the system, at least one segment and / or at least one roller and / or at least one partial roller, the evaluated data being used to monitor the roller break and / or to monitor the roller slip. This ensures that an automated monitoring and diagnosis of bearing forces is feasible and so the operating state can be diagnosed automated.

It is particularly expedient if there is a data or signal connection between the transducers at the respective bearings and the evaluation unit, which is designed as a data bus or by means of direct cabling. Furthermore, it is expedient if the measured and / or evaluated data are displayed by means of at least one display unit and / or used for control or regulation purposes.

The object with regard to the method is achieved with the features of claim 4, according to which a method is provided for detecting and monitoring an operating state of a strand guide from strand guide segments, in particular a slab or thin slab plant, with at least one segment with rollers and / or part rolls, by means of Bearings are stored, being arranged to monitor bearing forces and / or the time change of bearing forces on at least individual bearings transducers, the data determined by the Meßwertaufnehmem be forwarded to an evaluation, for evaluation and / or signaling of the operating state of the system, at least a segment and / or at least one roller, and / or at least one Tellrolle, wherein the evaluated data are used to monitor the roll break and / or to monitor the role slip.

It is particularly expedient if there is a data or signal connection between the transducers and the evaluation unit, which is designed as a data bus or by means of direct cabling.

It is also advantageous if the measured and / or evaluated data are displayed by means of at least one display unit and / or used for control or regulation purposes.

Furthermore, it is advantageous if the measured and / or evaluated data are statistically evaluable for generating a storage statistics, a symmetry statistics for the detection of uneven loads, a wear statistics for the detection of wear and / or monitoring statistics to determine a preventive maintenance, for machine maintenance, machine optimization and / or an adjustment of a load distribution.

Further advantages emerge from the claims and from the following description of the figures.

Brief description of the drawings

Fig. 1

eine schematische Darstellung einer hierarchischen Strukturierung ausgehend von einer Maschine bis zu einem Lager,

Fig. 2

eine schematische Anordnung eines Segments,

Fig. 3

eine schematische Darstellung der Verbindung von Messwertaufnehmern,

Fig. 4

eine schematische Darstellung einer Anschlussbox zur Verbindung von Messwertaufnehmern,

Fig. 5

eine schematische Anordnung eines Segments mit Verbindung zu einer Auswerteeinheit,

Fig. 6

eine Rollenanordnung mit Anzeigeelementen zur Anzeige eines Betriebszustandes,

Fig. 7

eine Rollenanordnung mit Anzeigeelementen zur Anzeige eines Betriebszustandes,

Fig. 8

eine Maschine mit Segmenten und mit Anzeigeelementen zur Anzeige eines Betriebszustandes, und

Fig. 9

mit den Figuren 9a bis 9f jeweils eine Anzeige zur Darstellung eines Betriebszustands.

The invention will be explained in more detail on the basis of an embodiment with reference to the drawings.
Show it:

Fig. 1

a schematic representation of a hierarchical structuring from a machine to a warehouse,

Fig. 2

a schematic arrangement of a segment,

Fig. 3

a schematic representation of the connection of transducers,

Fig. 4

a schematic representation of a connection box for connecting transducers,

Fig. 5

a schematic arrangement of a segment with connection to an evaluation unit,

Fig. 6

a roller arrangement with display elements for displaying an operating state,

Fig. 7

a roller arrangement with display elements for displaying an operating state,

Fig. 8

a machine with segments and display elements to indicate an operating condition, and

Fig. 9

with the FIGS. 9a to 9f in each case a display for displaying an operating state.

Preferred embodiment of the invention

The FIG. 1 shows a hierarchical structure 1 of a machine, in particular a continuous casting plant or in particular a slab or thin slab plant.

In this case, the system may consist of one or a plurality of machines 2, wherein the respective machine 2 is subdivided into a plurality of segments 3, which in each case in turn subdivided into subsegments 4. In this case, a sub-segment 4 may comprise a segment side of a loose or fixed side of the segment. The segments or the sub-segments 4 in turn comprise rollers 5, which may, for example, also be subdivided into a plurality of sub-rollers 6, these being supported by means of the bearings 7.

To measure the bearing forces, transducers 8 are preferably mounted or inserted directly on the bearings 7, which may preferably be integrated in the bearing blocks of the bearings 7 and detect the forces transmitted to the bearings.

By means of the measured values or data acquired by the transducers 8, the forces acting on the sub-roller 6 of the divided roller 5, on the roller 5, if necessary also with several sub-rollers 6, on the sub-segments 6, for example at least one segment side, such as a loose or fixed side, on the segments, for example, on a loose and / or fixed side and on the machine with the segments of the system, for example, a slab or thin slab plants are closed. The data thus represent the respective bearing forces at the time of measurement. Advantageously, the bearing force is also measured time-resolved, so that from an evaluation, the time course of the bearing forces and their time derivative can be determined.

In this case, the measuring methods and systems which can be used to detect a bearing force via a bearing gap that is changed when the force is applied can preferably be measuring methods or systems that sense the distance. Alternatively, pressure measurement methods and systems which work, for example, via strain gauges or according to the load cell principle, can be used for force measurement. In principle, however, it is also possible to choose those measuring systems or methods which are able to cope with the specific environmental / operating conditions and thereby have the required or predetermined measuring accuracy and preferably have a sufficiently high reproducibility of the measurement results determined.

Usually, the strand guide of a slab or continuous slab caster consists of a number of segments 3, the number of which is determined by the respective product requirements. The number may preferably consist of a plurality of, for example, up to 20 segments with respective corresponding roller conveyor. In a segment of a slab plant, for example, between 20 to 80 bearings are available, 2 to 10 rollers or partial rollers, ie rollers with a corresponding pitch and possibly even per segment frame on the top and / or bottom.

In order to obtain a complete impression with a comprehensive overview of the occurring bearing force ratios, and / or the bearing force distribution in a segment, it is preferably expedient if all or a representative number of bearings in a segment are monitored for bearing force.

In the process picture hierarchy, a detection and signaling of the operating state or a display representing it for detailing the information content for the operator can be performed. The deeper the hierarchy of the process picture or the process information is considered, the more detailed the information content can be selected, so that depending on the hierarchy a desired depth of detail of the information can be selected.

The FIG. 2 shows for clarity a segment 10, in which a slab 11 between two rollers 12,13 is arranged with two partial rollers 14,15,16,17. The rollers 12,13 and the related sub-roles 14,15,16,17 are each associated with a segment top 18 as the lot side or a segment bottom 19 as a fixed side. The rollers 12, 13 or the partial rollers 14, 15, 16, 17 are each supported by means of external bearings 20 and / or by means of center bearings 21. At least some or all of these bearings 20,21 serve to receive the measuring elements or measuring systems for carrying out the bearing force measurement and can be provided accordingly.

The distance measurements are evaluated centrally and / or decentrally. The respective measuring elements or measuring systems are placed directly on the segments or their bearings and connected by means of data and / or energy connection, such as cables, so that the connection to peripheral units and evaluations by one or the number of systems to be used corresponding connections, such as cables , bundled can be made. Due to the possible extensions of the measuring systems, the number of evaluation points can be easily adapted in order to make the results more accurate or more representative. Alternatively, the cable connection can also be replaced by a wireless connection.

The metrological evaluation of the recorded data takes place via measuring computers or measurement evaluation systems, which can be set up and connected centrally or decentrally.

The FIG. 3 schematically shows an arrangement of a plurality of force measuring elements 31 as measuring elements in a segment 30. The elements 31 are connected by means of electrical connections 32,33 both to the data connection 33 and to the power or power connection 32 to a connection unit 34, the FIG. 3 is called connection box. The data connection preferably takes place via a data bus connection 33, the elements 31 each having a subunit for transmitting and / or receiving data via the data bus 33.

The energy or power connection and the data connection is further transmitted via a further connection 36 to or from a converter 35, which ensures the power / voltage supply and the data transmission by means of a data bus.

The FIG. 4 shows a connection unit 34 once again schematically with cable ducts 37 through the wall 38 of the housing 39 of the unit 34. It can be seen a cable connection 36 to the converter, which is designed with the electrical supply 40 and the data bus 41. In addition, cable connections 42 can be seen, which the connections 32,33 of FIG. 3 realize and ensure both electrical supply and data connection via data bus.

By measuring the bearing force in each case on a plurality of bearings of rollers and / or partial rollers of at least one segment, but advantageously also on bearings of a plurality of segments can advantageously be carried out a representation of the state of the slab plant, thin slab or continuous casting, so for example a Operator one Quick overview of the condition of the plant receives. This presentation can be graphically edited to provide the essential information so that the operator can quickly get an overview of the operating status of the system.

As a result, it is advantageously possible to carry out a rapid localization of errors which have occurred or are expected, identification of sources of interference and recognition of, for example, only local overloads.

In addition, an uncomplicated and rapid recording of the measured values of the measuring elements of the bearing force measurements and their evaluation, for example, their statistical evaluation can be performed. An assignment of the measurement results to the monitored or measured segment or to the strand can also take place and these corresponding data can also be forwarded to a central location, such as to a control center, such as a switching house of a continuous casting plant, so that there For example, via a measuring PC or other evaluation systems, a data evaluation can be done. It can also be advantageous if, with the evaluation of the data, it is also possible to control and / or regulate adjusting means of the sub-rollers and / or rollers so that the bearings only load in accordance with a predefinable bearing force or in such a way that they do not bear a maximum bearing force become.

Furthermore, it is advantageous in a device according to the invention with the arrangement of measuring elements or measuring systems of bearings, if a simple and straightforward expansion option at least individual sub-rollers or rollers or a single segment can be done without significant additional mechanical / electrical expenses must be performed. It is advantageous if a realization of a coupling can be done by means of a plug connection. Thus, advantageously, the measuring element or the measuring system on a partial roller or on a roller or the measuring elements or measuring systems on a segment by a plug connection from the corresponding data connection and the electrical supply connection disconnected or connected to it. As a result, connection or decoupling can be carried out easily and simply.

In this case, the connector or its connector parts can be chosen such that a corresponding desired degree of protection of the connector can be realized.

Such a configuration of the connection of the measuring elements or measuring systems with an overall system also facilitates a simple and uncomplicated supplementation of a segment, for example, not yet fully equipped with further measuring elements, such as transducers, without the external cabling structure having to be adapted. It is sufficient if the additionally installed measuring element is connected via a connection unit, such as a connection box, to the overall system of the device.

The arrangement of the measuring elements on the respective camps provided for this purpose allows the decentralized detection of traversing speeds and / or path changes / time unit, thereby also force changes / time unit can be measured or determined and can be made available for example via a data protocol.

Furthermore, with the arrangement of the measuring elements according to the invention at the respective bearings, an automatic zero point calibration (TARA) of a single measuring point in the segment, a segment range (group), an entire segment or the complete system can be carried out, if appropriate on the basis of a combination of different events, such as a plant start with previous cold run, can be performed.

Furthermore, it is advantageous if a freely selectable and adjustable in operation via the protocol filter setting of filters is feasible to on this Way to present the available measurement signal of the measuring elements improved and thus also able to evaluate improved.

According to the invention with the decentralized arrangement of measuring elements on bearings of the system, the decentralized recording of measured values within predetermined limits for the measured values is possible, whereby, based on the measurements, reaching of the limit values is detected by the measured values and provided, for example, via the protocol can be.

It is also advantageous according to the invention if a flexible coupling of the bus connection can be carried out via a coded plug connection. In this case, the coded connector can be configured such that can be closed due to the connector and its coding on the placement of the segment with rollers and / or with measuring elements on the rollers and / or sub-roles.

The electrical coupling of the measuring elements to the bearings via an external cable connection with a flexible and / or detachable connection, possibly also via a plug connection. Also, the connection of the measuring elements or measuring systems placed on the segments by means of data / energy connection, such as cable, so that the connection to peripheral units and evaluations can be made bundled by one or the number of systems to be used corresponding cable connections.

Particularly advantageous is the variable number of bearing force measurements in a segment without changing the outer evaluation, so that the current measurement positions can be variably adjusted within the segment.

In particular, in continuous casting plants with a strand guide made of strand guide segments, which are equipped with rollers and / or sub-rollers or roller segments for guiding a casting strand, it is particularly advantageous if a predeterminable number of bearings or all bearings are equipped with elements for bearing force measurement. The results of the measured value detection of the bearing force are advantageously transmitted for evaluation and further processing to a central evaluation unit, such as a measuring PC or to a server.

The FIG. 5 shows this schematically. It is a set of rollers 50 each with two sub-rollers 51,52,53,54 to recognize, between the paired partial rollers arranged a slab 55 is added. At the bearings 56 of the sub-rollers measuring sensor 57 are provided as measuring elements, which determine the bearing force at the bearings 56. These data of the measuring elements are forwarded by data transmission, such as via data bus 58, to a measured value evaluation 59, for example at a control station, where a measuring PC 60 or a server 61 receives the data and by means of which the data can be evaluated.

The data transmission of the transducers 57 on / at the segments takes place via a data bus 58 or by means of structured cabling to the evaluation systems. For further processing, the data in the computer systems 60, 61 are analyzed, evaluated, calculated and / or graphically processed.

The evaluation of the signals or data is advantageously carried out via an electronic evaluation system, such as computer unit, measuring PC and / or server, this evaluation system for data acquisition and data processing is used.

The signal processing on the segment preferably takes place with corresponding data bus coupling to the evaluation systems or, alternatively, with a fixed or direct cabling.

The evaluated data can then be forwarded to the plant engineering and brought to the display or representation, or continue to be used for control and automation purposes.

By means of the arrangement according to the invention can advantageously be carried out a method of bearing monitoring or operating state monitoring, as already stated above. The bearing monitoring or operating state monitoring can be carried out in such a way that the evaluation of the axle-related bearings can be concluded by a completion evaluation of specific force profiles on certain anomalies or changes of a single role.

In the case of changes in the specific force curves such that recurring sequences do not occur and both involved bearings detect a significant or complete force reduction, it is possible to conclude that a roll has been broken. Thus, roll break detection can be performed.

In the case of changes in the specific force profiles in such a way that the courses change in such a way that the detected force profiles are slower compared to the expected force profiles, it can be concluded that there is a roller slip. Thus, roller slip monitoring can be performed.

In addition to the above monitoring, a statistical evaluation of the measurement results can also be carried out. Through the statistical evaluation of the bearing force measurements, the results described below can be determined, calculated, evaluated and displayed or displayed.

When detecting symmetry variations between the bearings of a roller, one-sided loading of the bearings can be deduced. The symmetry statistics thus allows detection of a one-sided load on the bearings.

When comparing the measured bearing force measurements with previously recorded data or setpoints and / or by means of a corresponding statistical evaluation, it can be concluded that a roller or a bearing is wearing out. It can thus be carried out a wear detection or statistics, among other things for the rollers or bearings.

The determined wear statistics can be used for a preventive maintenance interval determination so as to predict future events. The data can thus be used to determine upcoming maintenance and future maintenance intervals. Thus, monitoring statistics for establishing preventive maintenance can be performed.

By combining the results of the roll monitoring, it is possible to conclude the state of an entire segment. For this purpose, all results of roll monitoring can be used. Logical links of the role sub-results can be used to determine segment monitoring criteria. It can thus be performed a segment monitoring.

By summarizing individual role information and / or by condensing the data, one can infer the states of the segments. If the information content is adequate, the data obtained can be used to draw conclusions about any pending maintenance or the work to be performed. It can thus be implemented a monitoring statistics for establishing a preventive maintenance.

By summarizing individual role information and / or summarizing the data, it is possible to deduce the load distribution within a segment. The results can in turn serve as a basis for maintenance planning. It can thus be a monitoring statistics to determine a load distribution, for example, a segment implemented.

By summarizing individual role information or role data and / or by compressing the data, it is possible to deduce the wear within a segment. The results can in turn be used as a basis for maintenance planning.

By summarizing individual role information or role data and / or by summarizing the data, the upcoming maintenance can be planned and thus improved and targeted. Targeted maintenance scheduling minimizes unplanned downtime, increasing plant uptime and productivity. By combining the roll and segment monitoring results, it is possible to infer the condition of an entire strand. For this purpose, all results of roll and strand monitoring can be used. By logically linking the role results and the string results and partial results, string monitoring criteria can be determined. It can thus be implemented and implemented a strand and / or machine monitoring.

By combining the roll and segment monitoring results, it is possible to determine the machine status or the operating state of the entire line. This allows a diagnosis of the machine state or the operating state.

By combining the roll and segment monitoring results, the load and load distribution across the entire strand can be deduced. Thus, a stress analysis and stress distribution analysis can be performed.

By combining the role and segment monitoring results, the load, load distribution and thus machine utilization can be determined be optimized by the arrangement and the design of the rollers and segments is chosen such that the load and the load distribution remains within a predetermined range.

Particularly advantageously, a representation of the machine operating state can be carried out, for example, in a process diagram, in particular for the purpose of diagnostic aid and for the rapid determination of irregular states or states deviating from the standard operating state.

In this case, a use of a traffic light statistics for the condition detection per bearing can be used, see FIG. 6 , In FIG. 6 Rollers or sub-pairs of rollers are respectively arranged on the fixed side 71 and on the lot side 70, which are mounted in bearings. Associated with the bearings or at least individual bearings is a display or traffic light display 72, which represents the state of the bearing or its load. In this case, a green square is used, which signals that the bearing load is in a favorable acceptable range, so ok. Furthermore, a yellow circle is used, which is arranged above the green square. The yellow circle indicates that there is a heavy load or it should signal an announcement of a possible defect. This therefore means an "ATTENTION" signal. Above the yellow circle, a red triangle is still located, which signals a danger in which an overload or a defect is displayed.

With displayed intermediate positions or change direction displays, it is still possible to describe and display tendencies as well. According to the invention, it is therefore advantageous to make use of traffic light statistics, for example as described above, in order to carry out a status recognition per roller, see FIG. 7 ,

In FIG. 7 is a partial segment 80 shown with segment rollers 81 on the fixed side, which carry a slab 82. To display the bearing load, a display means 83 is provided, which signals the load in the traffic light structure described above. As in the left part of the picture FIG. 7 can be seen, a traffic light-like display 84 is still provided for displaying the role of burden to be able to display the role of load on both the lot side and on the fixed side. Also, the use of traffic light statistics take place, as described above, to be able to perform this for the state detection or status signaling per sub-segment. Also, the use of traffic light statistics may be performed to use them as described above for state detection per segment.

Also, the traffic light statistics or representation by means of traffic light symbols can be used to perform a state recognition per strand and / or for the machine, see FIG. 8 ,

FIG. 8 shows a machine 90 having individual segments 91. The segments 91 carry a slab 92. For each segment 91, a display 93 for signaling the operating state of the respective segment 91 is provided. In addition to the signaling of the static state of the operating state, it may be advantageous if a direction detection of a change in the operating state is performed and signaled. It can then be detected quickly from which direction the detected deviation comes from the ideal state or in which direction the detected deviation develops. In this case, it can be distinguished whether the deviation develops from high to low, that is, decreases or changes in the opposite direction, ie increases. This can represent estimated additional information for the plant assessment.

In FIG. 9 such a representation is shown schematically. In FIG. 9a is a static display shown, which signals an unopposed operating state (ok). In FIG. 9b a dynamic display is shown, which signals an unobjected operating state, but will change to the "attention" state or show a tendency in this direction. In FIG. 9c is a static display shown, which signals a medium operating state "attention". In FIG. 9d A dynamic display is shown, which signals a medium operating state "Attention", but will change to the direction of "danger" state or show a tendency in this direction. In FIG. 9e a static display is shown, which signals a hazardous operating state "Danger". In FIG. 9f is a dynamic display shown, which signals a "Danger" operating state, but in the direction of "Attention" will change or show a tendency in this direction.

The arrangement according to the invention thus provides an automation concept for the diagnosis of the machine state in which sub-machine states are monitored by at least one warehouse and / or at least one roller and / or at least one sub-segment and / or at least one segment or by the entire system or machine becomes. By the bearing force measurements and thus carried out detection of bearing forces and the transfer of the measurement signals to an evaluation system, such as a measuring PC and / or server, a statistical evaluation of the signals can be made.

It is particularly advantageous if a variable replacement and / or a variable equipment of the machine, the segments, the sub-segments and / or the rollers can be performed with transducers. An extension of the respective bearing measurements on the segment with low assembly and implementation costs is possible.

Particularly advantageous is the realization of the signal detection and / or signal preprocessing with placed on the segment measuring elements or measuring systems, which are conventionally connected with direct cabling or by means of data / power cable. Also, a data bus connection can be realized.

In addition to the detection of the bearing force of the bearing, a temporal change of the bearing force can be detected or determined. In this case, a detection of a lateral force, a total force and / or of ferrostatic loads can be performed.

The determined data can advantageously be stored in a memory and can be used to determine diagnoses on the historical data stored. The advantage here is the compression of current data for storage and long-term archiving.

LIST OF REFERENCE NUMBERS

1

hierarchical structure

2

machine

3

segment

4

subsegment

5

role

6

part role

7

camp

8th

Transducer, measuring element, measuring system

10

segment

11

slab

12

role

13

role

14

part role

15

part role

16

part role

17

part role

18

Segment top

19

Segment base

20

external storage

21

center support

30

segment

31

Force measuring element

32

connection

33

connection

34

connection unit

35

converter

36

connection

37

Grommet

38

wall

39

casing

40

care

41

bus

42

cable connection

50

roller set

51

part role

52

part role

53

part role

54

part role

55

slab

56

camp

57

transducer

58

bus

59

Measurement evaluation

60

computer system

61

computer system

70

loose side

71

fixed side

72

Display, traffic light display

80

subsegment

81

segmented rollers

82

slab

83

display means

84

display

90

machine

91

segment

92

slab

93

display

Claims (7)

1. Arrangement for detecting an operational state of a strip guide, particularly a slab plant or thin-slab plant, comprising at least one strip guide segment with rollers and/or sub-rollers, which are mounted by means of bearings, wherein measured value pick-ups for monitoring bearing forces and/or change over time of bearing forces are arranged at least at individual bearings, characterised in that an evaluating unit for detecting an operational state is provided, wherein the data detected by the measured value pick-ups are supplied to the evaluating unit for evaluation and/or signalling the operational state of the plant, at least one segment and/or at least one roller and/or at least one sub-roller, wherein the evaluated data are used for monitoring roller fracture and/or for evaluating roller slip.
2. Arrangement according to claim 1, characterised in that a data or signal connection constructed as a data bus or data radio connection or formed by means of direct cabling is present between the measured value pick-ups and the evaluating unit.
3. Arrangement according to one of claim 1 and 2, characterised in that the measured and/or evaluated data are displayed by means of at least one display unit and/or used for control or regulation purposes.
4. Method of detecting an operational state of a strip guide, particularly a slab plant or thin-slab plant, comprising at least one strip guide segment with rollers and/or sub-rollers, which are mounted by means of bearings, wherein measured value pick-ups for monitoring bearing forces and/or change over time of bearing forces are arranged at least at individual bearings, characterised in that the data detected by the measured value pick-ups are supplied to an evaluating unit for evaluation and/or signalling the operational state of the plant, at least one segment and/or at least one roller and/or at least one sub-roller, wherein the evaluated data are used for monitoring roller fracture and/or for evaluating roller slip.
5. Method according to claim 4, characterised in that a data or signal connection constructed as a data bus or data radio connection or formed by means of direct cabling is present between the measured value pick-ups and the evaluating unit.
6. Method according to one of claim 4 and 5, characterised in that the measured and/or evaluated data are displayed by means of at least one display unit and/or used for control or regulation purposes.
7. Method according to one of claims 4 and 5, characterised in that the measured and/or evaluated data are statistically evaluatable for generating a bearing statistic, a symmetry statistic for recognition of non-uniform loads, a wear statistic for detection of wear and/or a monitoring statistic for determination of preventative maintenance, for machine maintenance, machine optimisation and/or adaptation of a load distribution.

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