DE102017110301A1 - Method for monitoring at least one component of a roll bar carpet of a continuous press, monitoring device and continuously operating press - Google Patents

Abstract

A method and a monitoring device for monitoring at least one component (62) and / or component type (26, 28, 48, 58, 64, 66) of a roll bar carpet (22a, 22b) of a continuously operating press for producing press plates, in particular material plates from wood and / or other renewable agricultural products such as chipboard, fiber, straw and Schnitzelplatten, as well as plastic plates described. At least one spatial area that passes through the at least one component (62) and / or component type (26, 28, 48, 58, 64, 66) under normal conditions is detected by means of at least one optical detector as a two-dimensional optical image (46). At least one actual state of at least one defined image section (50) of the image (46) is compared with a predefinable desired state. If any deviations of the at least one actual state from the desired state exceed a predetermined limit, at least one warning message is generated.

Description

The invention relates to a method for monitoring at least one component and / or component type of a roll bar carpet of a continuously operating press for the production of press plates, in particular material plates made of wood and / or other renewable agricultural products such as chip, fiber, straw and Schnitzelplatten, and plastic plates.

Furthermore, the invention relates to a monitoring device for at least one component and / or component of a roll bar carpet a continuous press for the production of press plates, in particular material plates made of wood and / or other renewable agricultural products such as chip, fiber, straw and Schnitzelplatten, and plastic plates.

Moreover, the invention relates to a continuously operating press for the production of press plates, in particular material plates made of wood and / or other renewable agricultural products such as chip, fiber, straw and Schnitzelplatten, and plastic sheets, the press at least one roll bar carpet and at least one monitoring device for at least a component and / or component of the at least one Rollstangenteppichs has.

From the DE 20 2014 104 140 U1 For example, a continuous press for making sheets of material or mats, at least comprising a lower press table with a lower press / hot plate and an upper press bar with an upper press / hot plate forming an adjustable press nip, is known. There are two endless bands around the press table and the press bear for pressing the pressed material in the press nip along a press line. The bands are movably supported relative to an abutment of the press table or pressing bear by means of an endless revolving roll carpet. The rolling body carpet consists of a plurality of axially transversely to the strip running direction arranged rolling bodies, which are connected via axially arranged rods in connection with arranged outside the press nip guide chains. In an axial deviation of the rolling body from a predetermined ideal range means for introducing axial restoring forces are arranged directly in the rolling body between the rolling body and guide chain. At the press, a sensor for determining the force acting on the rolling body pressure and / or a unit for detecting the course of the rolling bodies is arranged.

The invention has for its object to design a method, a monitoring device and a continuously operating press of the type mentioned, in which deviations of at least one component or component of the roll bar carpet from its predetermined state, in particular their intended position, can be better recognized.

The object is achieved in the method according to the invention in that at least one spatial area, which passes through the at least one component and / or component type under normal conditions,
is detected by means of at least one optical detector as a two-dimensional optical image, at least one actual state of at least one defined image section of the image is compared with a predefinable desired state,
If any deviations of the at least one actual state from the desired state exceed a predetermined limit, at least one warning message is generated.

Thus, according to the invention, at least one spatial area which contains the at least one component and / or component type under normal conditions, ie during trouble-free operation, is detected simultaneously and quickly as a two-dimensional optical image. In this way, a corresponding snapshot of a larger spatial area can be generated even with a high-speed roll bar carpet. In the captured image, one or more image sections are defined, in which corresponding actual states are respectively compared with corresponding predetermined desired states.

Because only the defined image sections and not the entire image must be analyzed, the comparison can be carried out correspondingly faster. Thus, the roll bar carpet can be reliably monitored even at high speeds.

If a deviation of at least one actual state with the corresponding predetermined desired state exceeds a predetermined level, a corresponding warning message is generated. By specifying the limit of the deviation, a corresponding tolerance can be defined.

The warning message can be used accordingly for further processing. Thus, on the basis of the warning messages, in particular functions of the press and / or the at least one detector can be influenced and / or visual and / or acoustic warning signals can be output.

Advantageously, the at least one detector at a significant distance, in particular at a distance of at least 1.50 m, preferably about 2 m, from the roll bar carpet be arranged. In this way, influences of operating conditions in the area of the roll bar carpet, in particular heat, dirt, moisture, vibrations or the like, can be reduced to the at least one detector.

Advantageously, the at least one detector can be tempered with a cooling device, in particular cooled. In this way, the detector can work reproducibly even at relatively high or low operating temperatures. In this case, the cooling device can in particular use a liquid and / or gaseous cooling medium, in particular air, water or nitrogen, and / or a Peltier cooling or another suitable cooling.

Advantageously, the at least one detector can be protected against soiling, in particular dust, oil, moisture or the like. The at least one detector can be arranged for this purpose in a particularly closed housing. The housing can advantageously have at least one window, by means of which the roll bar carpet can be detected with the detector. For the at least one window, a cleaning system, in particular a wiper device, be provided to remove any dirt even during operation.

Advantageously, the housing of the detector can be subjected to a slight overpressure. In this way, the penetration of dirt and moisture can be better prevented. The housing can also be flowed through with gas, in particular air. For example, penetrating dirt or moisture can be discharged from the housing. Furthermore, such a temperature control, in particular cooling, can be improved. With the means shown, it is also possible to better counteract a moisture precipitation, in particular in the region of the window and / or an optic and / or a sensor of the detector.

Advantageously, the monitoring device can have at least one light source. With the at least one light source, the spatial area to be monitored can be illuminated. In this way, a contrast can be increased so that the at least one component or component type can be detected better and more accurately.

Advantageously, the frequency range of the light source and the frequency range in which the detector operates, be coordinated. In this way, correspondingly better detection accuracies can be achieved.

The spatial area to be monitored can be illuminated directly with at least one light source. Alternatively, the spatial area to be monitored can be illuminated indirectly, for example via mirrors, light guides or the like. In this way, the at least one light source can be arranged more flexibly, even at a greater distance from the roll bar carpet.

In this case, illumination can take place from a rear side of the at least one component facing away from the at least one detector. In this way better contrasts can be created.

Alternatively or additionally, illumination can take place from the detector side. Thus, a corresponding light source can be arranged in a space-saving manner in the region of the detector, in particular integrated in it. In this way, the monitoring device can be made more compact overall.

Advantageously, the monitoring device, in particular at least one detector, can have a particularly integrated control system with which it can be determined, in particular, if a contrast is too low. If a low contrast is detected, a corresponding detector property, in particular a sensitivity, can be corrected and / or a corresponding warning signal can be generated, which indicates that the monitoring of the at least one component or component type is limited or even impossible due to insufficient contrast is.

Advantageously, at least one detector can have at least one test device with which a basic setting during startup and / or a test of the at least one detector can be simplified. Advantageously, a test pattern or the like can be provided for this purpose. The test device can also be used to perform test measurements to determine the desired states.

In an advantageous embodiment of the method, at least one spatial area with at least one component and / or a component type in the form of bending bars, bending bar clips, rolling bars, carrying rollers, chain links, deflectors, at least one chain zero point marking, at least one sprocket can be detected by means of the at least one detector. The corresponding component and / or component type of the roll bar carpet can be monitored separately at the same time. The corresponding image sections may be specifically adapted to detect possible deviations of the corresponding component and / or component type. In this way For example, the corresponding deviations can be more accurately identified, thereby simplifying the selection of the appropriate error routine.

According to the method of the invention, a component, in particular a guide chain and / or a sprocket, can be monitored. Alternatively or additionally, a component type, in particular rolling rods, bending rods, bearing sleeves, chain links, deflectors, support rollers or the like, are monitored. In this case, all components of the same type, in particular all rolling rods, all bending rods, all bearing sleeves, all chain links, all deflectors, all support rollers or the like, in particular continuously monitored by appropriate sequential image recordings in a continuous roll bar carpet.

In a further advantageous embodiment of the method, at least one state of at least one image detail may be characterized by a degree of blackening, a brightness, a contrast profile, at least one dimension, at least one position of the at least one component and / or component type or the like. Thus, the respective states can be clearly defined and compared. Deviations between the respective actual states and the corresponding desired states can be detected quickly and easily.

In a further advantageous embodiment of the method states of several image sections can be monitored. In this way, several different components and / or component types can be monitored simultaneously. In this case, each component and / or component type can be assigned at least one corresponding image detail. The image sections can be optimally defined in this way and the regions of interest can be analyzed with the corresponding components and / or component types. In this way, any deviations of the actual states and the desired states of multiple components and / or component types can be detected accordingly quickly and easily.

In a further advantageous embodiment of the method, at least one image can be detected while the roll bar carpet is running. In this way, the roll bar carpet can be monitored online during the operation of the press. In case of any deviations from the desired state corresponding warning signals can then be generated. It is not necessary that the roll bar carpet be stopped for monitoring.

In a further advantageous embodiment of the method, at least the image acquisition can be synchronized with a running speed of the roll bar carpet. In this way, corresponding images can be taken at defined locations of the roll bar carpet. The synchronization can be designed such that the at least one component and / or component type under normal conditions in the images are always detected when they are in the corresponding image section. In this way, a comparison of the respective actual state with the desired state can be realized in a simpler and more accurate manner.

In a further advantageous refinement of the method, a plurality of components of one type, in particular a plurality of rolling rods and / or a plurality of bending rods and / or a plurality of chain members of at least one guiding chain of the rolling rod carpet, can be detected in at least one image. In this way, a correspondingly larger area of the roll bar carpet can be detected simultaneously. Thus, the overall detection reliability for errors can be increased. Alternatively or additionally, as a whole, the speed of detection can be increased, so that even with a correspondingly higher running speed of the roll bar carpet a secure monitoring can be ensured.

Advantageously, at least one sprocket for guiding the roll bar carpet can be monitored with the at least one detector. In this way, it can be detected in particular if the at least one sprocket does not thread properly into the corresponding guide chain due to the wear of the sprocket or an impermissible elongation of the chain.

In a further advantageous embodiment of the method, a plurality of images can be sequentially acquired while the trolley carpet is running in such a way that at least one component is contained in a plurality of images. In this way, a redundancy in the monitoring of the components and / or component type can be generated. Thus, a detection reliability for errors can be further increased. The at least one component can thus be checked several times in succession and a development of its actual state can be tracked.

In a further advantageous embodiment of the method, at least one image section can be predetermined with a defined length extending in the running direction of the roll bar carpet and / or a defined width extending transversely to the running direction of the roll bar carpet. In this way, the image sections can be clearly defined.

With the defined length extending in the running direction, corresponding changes in position and / or shape of the monitored component and / or component type in the running direction of the roll bar carpet can be detected. In particular, it can be recognized by the length whether a roll bar or a bending bar is bent or worn. Furthermore, it can thus also be recognized whether a sleeve, in particular a bronze sleeve, which connects the bending rods to the respective rolling rods, is worn. In addition, a corresponding roll bar gap can be detected, which arises if a roll bar has completely or partially detached from the roll bar carpet, in particular one or both guide chains. Furthermore, it can be recognized whether an elongation of the monitored guide chain exceeds a specifiable limit.

By the defined width extending transversely to the running direction of the roll bar carpet, corresponding position and / or shape changes of the monitored component and / or component type transversely to the running direction can be detected. For example, it can be recognized if a roll bar or a bending bar is displaced axially from a corresponding desired position. A bending rod can be displaced, in particular, when a corresponding bending-bar clip, which ensures the locking of the bending rod on the chain link, is open.

With the aid of an image section with a defined width, it is also possible to determine, in particular measured, a rolling rod course, in particular a maximum rolling rod offset. In a roll bar offset one or more rolling rods are displaced in the axial direction relative to their desired position. About the maximum roll bar offset a course of a corresponding endless belt, in particular an endless steel belt, are monitored, which can be performed with the roll bar carpet. Upon detection of an impermissible deviation of the rolling rod course, a correction can be carried out in particular with a control device of the press.

In addition, a picture detail can be selected so that idlers of chain links of the guide chains can be monitored. Thus it can be recognized if a carrying roller is damaged, in particular broken or worn, is or is missing.

Furthermore, deflectors can be monitored on chain links. So can be detected if a deflector is broken or bent.

In a further advantageous embodiment of the method, as a result of the warning, the at least one corresponding image can be stored, an optical and / or acoustic signal can be output and / or a corresponding functional sequence of the press can be influenced. In this way it can be prevented that the detected deviations lead to disturbances or damage to the roll bar carpet.

Advantageously, images in which deviations between the at least one actual state and the desired state are detected can be stored. In another cycle of the roll bar carpet, the location of the roll bar carpet where the deviation was detected can be checked again. The storage of the images can take place in a control and / or evaluation device of the at least one detector and / or the monitoring device.

Alternatively or additionally, stored images can be evaluated more accurately, especially by maintenance personnel. Thus, a further control option can be created.

Furthermore, an image sequence can be generated from a plurality of successively recorded images. An image sequence can be evaluated quickly and efficiently especially by maintenance personnel.

Overall, the storage and playback of the images in question has the advantage that the press first does not have to be stopped in order to analyze the detected deviation.

As a result of the warning message, a corresponding functional sequence of the continuously operating press can also be influenced. In this case, the press can be stopped directly or deliberately continued or driven empty. A targeted emptying of the press or a stop of the press are particularly preferred when particularly critical disturbances of the roll bar carpet, in particular the absence of a rolling rod or a bending rod, is detected.

Advantageously, when detecting a deviation of an actual state from a desired state and a position of the affected component on the roll bar carpet can be detected. This can be done in particular by determining the position of the component concerned relative to a chain zero point of one of the guide chains. By knowing the exact position of the affected component, the press can be deliberately drained. The section of the roll bar carpet in which the affected component is located can then be driven selectively into a maintenance area of the press, where a corresponding repair or maintenance can be carried out.

If the detected deviation is a less critical error, which can also be remedied later, acknowledgment of the error can initially be dispensed with. In this case, it can be dispensed with stopping the press directly or deliberately driving empty. The error can be remedied after an already required empty drive of the press and before restarting or at a later time, in particular during one of the following maintenance shifts, during which maintenance measures are carried out anyway.

Furthermore, according to the invention, the technical problem is solved in the monitoring device in that the monitoring device has at least one two-dimensional optical detector which is or can be arranged such that at least one spatial area is provided by the at least one component and / or component type under normal conditions goes through, as a two-dimensional image can be detected
the monitoring device has at least one control and / or evaluation device with which at least one image section of the image can be defined with which a desired state of the at least one image section is predetermined and with which an actual state of the at least one image section is State can be compared
and with the at least one control and / or evaluation device at least one warning message can be generated if any deviations of the at least one actual state from the desired state exceed a predetermined limit.

According to the invention, the monitoring device according to the invention can be used for monitoring.

Advantageously, an algorithm, in particular in the form of software, can be provided with which the at least one image detail can be specified and / or a comparison of the states can be carried out. The algorithm can advantageously be realized and executed in the control and / or evaluation unit or the at least one detector or another processor device.

Advantageously, the monitoring device may comprise at least one optical detector for each guide chain. In this way the areas of the roll bar carpet in the area of the guide chains can be monitored. In these areas of the roll bar carpet, several different types of components can best be monitored.

Advantageously, the monitoring device may comprise at least two detectors, preferably four detectors. In this way, two roll bar carpets, namely a lower and an upper roll bar carpet, can be monitored with a total of four guide chains.

It is also possible to use more than four detectors. So also areas between the deflections of the roll bar carpets can be monitored.

Advantageously, the monitoring device can have at least one chain zero point pickup, in particular a chain zero point counter. In particular, the chain zero point pickup may have a chain zero mark or the like on one or both guide chains. The chain zero mark can be advantageously designed so that it can be detected without contact. With the help of the chain zero counter, the position of the roll bar carpet can be determined as it passes through. Thus, the components of the roll bar carpet can be easily and reliably assigned to corresponding images.

Advantageously, a chain zero point can be marked with a so-called special chain link. The special chain link may in particular laterally have a projection, in particular a pin, which can be detected with a corresponding detection device, in particular the optical detector, a light barrier or the like.

Advantageously, with the monitoring device under execution of the method according to the invention, an elongation of at least one guide chain can be determined. The chain elongation can be determined taking into account a current running speed of the roll bar carpet over a defined distance and the thereby detected chain links. If there is an exceeding of a predetermined maximum chain extension, a corresponding warning message can be generated. Usually, a maximum chain elongation of 1% of the total length of the guide chain should not be exceeded. As a result of the warning message, an optical and / or acoustic signal can be generated, in particular to inform maintenance personnel. Additionally or alternatively, the respective chain extensions of the two guide chains can be compared with each other. Then the guide chains can be synchronized accordingly.

In an advantageous embodiment, at least one synchronization device can be provided, with which at least one detector and a running speed of the roll bar carpet can be synchronized.

With the at least one synchronization device, each time a characteristic component, in particular one of the roll bars, one of the bending bars or one of the chain links passes a defined location, a trigger signal for the detector can be output to produce an image.

For this purpose, the synchronization device can have at least one corresponding trigger with which a triggering signal for the at least one detector can be output when a characteristic component passes by. The at least one trigger can act without contact. In particular, the at least one trigger can have a lighting system, in particular a light barrier, or a proximity switch or the like.

The synchronization device, in particular the at least one trigger, can have a trigger component with which a trigger pulse can be generated.

The synchronization device can be configured so that an image can be detected in each case passing characteristic component. Advantageously, with each image a predetermined number of components of a kind can be detected. In this way, the monitored with the respective image portions components one kind, in particular the rolling rods, bending rods, bearing sleeves, deflectors, support rollers or chain links or the like, can be added sequentially in the respective successive positions. Thus, a detection security can be improved.

Alternatively, the synchronization device may be designed such that in each case one image can be detected after passing a predetermined number of characteristic components. An image can be so large that correspondingly many of the components to be detected are detected simultaneously. Each of the components of a species to be detected will therefore only be recorded once each time the roll bar carpet passes through. In this way, a total of one processing time can be reduced.

Advantageously, a synchronization of the two guide chains can take place with the aid of the synchronization device. So can be done with appropriate trigger signals chain synchronization. As a reference with respect to the synchronization can be used on the roll bar carpet anyway existing components, in particular rolling rods, bending rods, chain links or the like.

In addition or as an alternative to a characteristic component of a type, at least one separate, in particular contactless, detectable marking can also be arranged on the roll bar carpet, on the basis of which image acquisition can be triggered.

In an advantageous embodiment, the at least one detector can be configured and / or arranged such that several components of one type can be detected simultaneously with it. In this way, the corresponding components of the roll bar carpet can be detected simultaneously.

Advantageously, a plurality of rolling rods and / or chain links can be detected simultaneously with the at least one detector.

In a further advantageous embodiment, the at least one control and / or evaluation device may be functionally connected to a control device of the at least one detector and / or a control device of the continuously operating press. In this way, starting from a possible warning signal, the function of the at least one detector can be controlled by or via the press via the corresponding control device. In particular, images can be stored or stopped according to the press or continue to drive targeted.

The control and / or evaluation device can be realized separately. It can be connected to other higher-level control devices, in particular a higher-level computer, which controls the press. Thus, the monitoring device according to the invention and the inventive method can be integrated into a corresponding error management, which also controls other functions of the press.

In addition, the technical task is solved in the continuous press by the fact that the monitoring device has at least one two-dimensional optical detector arranged or can be such that with him at least a spatial area, the at least one component and / or component under normal Conditions passes through, can be detected as a two-dimensional image, the monitoring device has at least one control and / or evaluation, with the at least one image section of the image can be defined, a desired state of the at least one image section is predetermined and an actual state of at least a picture detail can be compared with the desired state and with the at least one control and / or evaluation at least one warning message can be generated if Any deviations of the at least one actual state from the desired state exceed a predetermined limit.

Incidentally, the features and advantages shown in connection with the method according to the invention, the monitoring device according to the invention and the press according to the invention and their respective advantageous embodiments apply mutatis mutandis and vice versa. The individual features and advantages can, of course, be combined with one another, whereby further advantageous effects can be achieved that go beyond the sum of the individual effects.

• 1 eine kontinuierlich arbeitende Presse mit einer optischen Überwachungsvorrichtung für Komponenten eines Rollstangenteppichs;
• 2 bis 6 Bilder von räumlichen Bereichen des Rollstangenteppichs, welche mit einem optischen Detektor der Überwachungsvorrichtung aus der 1 zur Erkennung von Abweichungen aufgenommen wurden.

Further advantages, features and details of the invention will become apparent from the following description, are explained in more detail in the embodiments of the invention with reference to the drawing. The person skilled in the art will expediently also individually consider the features disclosed in the drawing, the description and the claims in combination and combine these into meaningful further combinations. It show schematically

• 1 a continuous press having an optical monitor for components of a roll bar carpet;
• 2 to 6 Images of spatial areas of the roll bar carpet, which with an optical detector of the monitoring device of the 1 were recorded to detect deviations.

In the figures, the same components are provided with the same reference numerals.

In the 1 is a longitudinal side view of a continuous press 10 for the production of press plates, such as wood panels and / or other renewable agricultural products such as chipboard, fiber, straw and Schnitzelplatten and plastic plates shown.

The press 10 includes a spatially lower endless steel strip 12a and a spatially upper endless steel band 12b , The lower steel band 12a is via a corresponding outlet side lower drive drum 14a , in the 1 right, driven and deflected and a lower tail pulley 16a , in the 1 left, diverted. Accordingly, the upper steel band 12b via an outlet-side upper drive drum 14b driven and deflected and an upper tail pulley 16b diverted. The tail pulleys 16a and 16b are located on the inlet side of the press 10 , The drive drums 14a and 14b are arranged on the outlet side. Between an upper run of the lower steel band 12a and a lower strand of the upper steel strip 12b becomes pressed material 18 in a production direction 20 through the press 10 transported and to press plates 21 pressed.

Inside one of the lower steel band 12a Surrounded area is a bottom endless roll cage carpet 22a arranged. The lower roll bar carpet 22a is due to not interesting here deflection devices in the production direction 20 considered behind the tail pulley 16a and in front of the drive drum 14a each deflected. Accordingly, within one of the upper steel strip 12b surrounded area an upper endless roll bar carpet 22b arranged.

The two roll bar carpets 22a and 22b are the same in their structure. They can differ in their length. Every roll bar carpet 22a and 22b includes two endless guide chains 24 of which one in the 2 to 6 is shown. The leadership chains 24 run at a distance parallel to each other. Between the leadership chains 24 extends a variety of rolling rods 26 each perpendicular to the guide chains 24 , The roll bars 26 are at their ends in each case via so-called bending rods 28 rotatable about its respective longitudinal axis and axially displaceable by a predeterminable axial play with the guide chains 24 connected. The bending bars 28 are in corresponding bearing sleeves 30 for example, bronze in the axial end faces of the rolling rods 26 stored. The bending bars 28 and the bearing sleeves 30 are among others in the 4 shown.

A spatially upper run of the lower roll bar carpet 22a lies on a spatially lower side of a spatially upper run of the lower steel strip 12a at. On the upper strand of the lower steel band 12a opposite bottom of the upper run of the lower roll bar carpet 22a there is a press / heating plate 32a , Between the press / heating plate 32a and the lower steel band 12a are the roll bars 26 of the lower roll bar carpet 22a inserted in each case. The circulation of the lower roll bar carpet 22a ensures the roll support of the lower steel strip 12a opposite the press / heating plate 32a ,

The spatially lower strand of the upper roll bar carpet 22b runs between the spatially lower strand of the upper steel strip 12b and an upper pressing / heating plate 32b. The roll bars 26 of the upper roll bar carpet 22b provide for the rolling support of the upper steel strip 12b opposite the upper pressing / heating plate 32b.

Furthermore, the press has 10 via a monitoring device 34 for components of the roll bar carpet 32a and 32b namely the rolling bars 26 , the bending bars 28 , the bearing sleeves 30 and the leadership chains 24 , The monitoring device 34 In total, for example, there are four substantially identical detector systems 36 of which two are exemplary in the 1 are shown.

Each detector system 36 includes a two-dimensional optical detector 38 For example, in the form of a camera with a two-dimensional, spatially resolved sensor chip, a control / evaluation 40 , a trigger 42 and a light source 44 ,

One detector each 38 is directed to a spatial area through which one of the guide chains 24 in the area of the inlet of the press 10 running. There are two of the detectors 38 below the lower run of the lower roll bar carpet 22a and two of the detectors 38 above the upper run of the upper roll bar carpet 22b arranged.
Alternatively, two of the detectors 38 in running direction 52 in the ascending area of the lower roll bar carpet 22a in front of the tail pulley 16a and two of the detectors 38 in the direction of travel 52 in the descending area of the upper roll bar carpet 22b in front of the tail pulley 16b inside the roll bar carpet 22a . 22b be arranged. Likewise, other areas of the roll bar carpets 22a . 22b conceivable for the arrangement of the detectors.
Every detector 38 is a light source 44 assigned, which is on the corresponding roll rod carpet 22a or 22b located opposite side. With the light sources 44 become the corresponding roll bar carpets 22a and 22b from their relative to the respective detectors 38 Illuminated backward sides.

The detectors 38 are connected control and signaling technology with their respective control / evaluation 40. Furthermore, 40 images captured with the control / evaluation device 46 stored and processed.

The triggers 42 are near one of the leadership chains 24 of the corresponding roll bar carpet 22a or 22b arranged so that with them passing of characteristic components of the roll bar carpet 22a or 22b For example, the rolling rods 26 or the bending bars 28 , can be recorded. The triggers 42 can be configured for example as a photoelectric barrier or proximity switch. With the triggers 42 every time one of the characteristic components, for example one of the rolling rods 26 or one of the bending bars 28 , the corresponding trigger 42 happens, a trigger signal will be generated. With the trigger signal can via the control / evaluation 40 the image triggering of the detector 38 can be started. So can the image capture of the detector 38 with the running speed of the corresponding guide chain 24 be synchronized. The triggers 42 So act as a synchronization device.

A method of monitoring the components of the lower roll bar carpet 22a will be exemplified below for all detector systems 36 on the basis of in the 1 shown spatially lower detector system 36 explained in more detail.

With rolling rod carpet running 22a comes with the trigger 42 every time one of the roll bars 26 passes over, generates a trigger signal and transmitted to the control / evaluation device 40.

With the control / evaluation device 40 becomes the detector 38 so driven that a picture 46 is detected. Such pictures 46 , which each snapshots of a spatial area with the corresponding components of the passing wheelbarrow carpet 22a show are in the 2 to 6 shown. The picture 46 in the 2 covers, for example, simultaneously twelve of the rolling rods 26 , the corresponding bending rods 28 and six corresponding chain links 48 the leadership chain 24 ,

With a suitable software will be with the control / evaluation 40 in the picture 46 several image sections 50 Are defined. In the 2 these are exemplary three image sections 50 , The image excerpts 50 are optionally visualized by rectangular frames.

For each of the image sections 50 is separately compared to a corresponding actual state with a predetermined desired state. The actual states and the desired states can be determined, for example, by a degree of blackening of the corresponding image detail 50 be characterized. The respective target states for each of the image sections 50 are for example determined in advance during test measurements and in the control / evaluation device 40 saved. If a deviation between the actual state and the corresponding desired state is determined, which exceed a predetermined limit, a warning message is generated. The limit of the deviation can be characterized in the described embodiment by a difference in the respective degree of blackening. In addition, the picture in question 46 in the control / evaluation device 40 stored so that it can be viewed again at a later date.

With the in the 2 left picture section 50 is an example of a course of the rolling rods 36 be measured by comparing the actual state with the predetermined desired state. The Indian 2 left picture section 50 has an in direction 52 of the roll bar carpet 22a defined length 54 and across the running direction 52 defined width 56 on. This picture detail 50 captures the spatial area through which the ends of the corresponding rolling bars 26 run over almost the entire length of the image 46 in the direction of travel 52 ,

The Indian 2 middle picture section 50 captures the spatial area through which the deflectors pass 58 the chain links 48 to run. If one of the deflectors 58 bent or broken, as exemplified in the 2 is shown, deviates the corresponding actual state of the central image detail 50 from the predetermined desired state, so that a corresponding warning signal is output. The warning signal is sent to the control / evaluation device 40 transmitted. Because it is a critical error - a broken deflector 58 Can the roll bar carpet 22 damage - is with the control / evaluation device 40 a corresponding warning signal to the central control device 60 the press 10 transmitted. With the central control device 60 a fault function sequence is started in which the press 10 deliberately drained and stopped. Furthermore, an audible and / or visual indication for the maintenance personnel can be issued.

The Indian 2 right picture section 50 is about square and in its length 54 in the direction of travel 52 smaller than the corresponding extension of a chain link 48 , This picture detail 50 is outside the spatial area with the chain links 48 and is directed to a spatial area through which a chain zero mark 62 in the form of a pen. Once the chain zero mark 62 in one of the pictures 46 in the corresponding right-hand section of the picture 50 appears, the actual state changes there and deviates from the desired state. The target state of the right image section 50 for example, characterizes the situation without chain zero mark 62 , A corresponding warning message in the form of a zero point message is generated and given to the control / evaluation device 40.

Starting from the zero point message, every time the trigger is triggered, the trigger is triggered 42 a corresponding position value gradually increased, so that with each image acquisition the corresponding position of the roll bar carpet 22a and thus a possible error can be detected.

In the 3 are exemplary further alternative or additional possibilities for the definition of image sections 50 shown.

In the picture 46 in the 3 on the left are three identical image sections 50 defined, each of which is associated with a position in which, under normal conditions, one of the bending bars 28 located. The length 54 the picture details 50 corresponds in each case to the illustrated diameter of the bending rods 28 , The width 56 the picture details 50 is slightly smaller than the visible range of the bending bars 28 , If one of the bending bars 28 is bent, as for example in the bending bar shown in the middle 28 If this is the case, the corresponding actual state of the relevant image section deviates 50 From the respective desired state, so that a corresponding warning signal as a warning message and, as already above in connection with the 2 explained, is passed on.

In the 3 on the right is a picture detail 50 defined, which the outer area with the chain links 48 supervised. With this picture section 50 can be detected if a carrying role 64 , such as in the 3 shown, missing; missing carrying role 65 or one of the bending bars 28 is axially displaced; shifted bending rod 29 , A bending rod 28 can then, for example, move axially when a corresponding bending bar clip 66 has solved. Is exemplary in the 3 one of the bending bars 28 shown axially displaced in the middle.

In the 4 are other alternative or additional ways of defining image sections 50 shown.

In the 4 is an upper part of the picture 50 directed to the spatial area that the ends of the rolling bars 26 run through. With this picture section 50 can be an axial offset of the roll bars 26 be captured, as he is in the 4 at one of the roll bars 26 is indicated.

An Indian 4 lower picture section 50 is directed to a spatial area, by the axial displacement of a roll bar 26 a corresponding bearing sleeve 30 running. Using this image section 50 can be detected if the bearing sleeve 30 worn or missing.

In the 5 is an example of an upper picture 50 defined so that it can be detected with him if one or more roll bars 26 absence.

An Indian 5 lower picture section 50 is defined so that it can be detected with it, if a corresponding roll bar 26 is bent. For that is the appropriate length 54 of the image section 50 chosen so that it is slightly larger than the imaged diameter of the rolling rods 26 ,

In the 6 is another way of defining a picture detail 50 shown with the absence of a roll bar 26 can be detected. The corresponding image section 50 extends here over a correspondingly larger extent transverse to the direction 52 of the roll bar carpet 22a ,

Because of that in a picture 46 several components of a kind, namely several rolling rods 26 , several bending bars 28 , several bearing sleeves 30 , several deflectors 58 and several links 48 , are recorded simultaneously, each of the components corresponding to successively recorded images 46 recorded several times. In this way, an error detection certainty can be improved.

In a not shown embodiment of the method is only after passing a predetermined number of characteristic components, for example, after passing five rolling rods 26 , with the trigger 42 a trigger signal can be generated. So only with every fifth roll bar 26 a picture 46 detected. The image section is so large that correspondingly many of the components to be detected, for example, five rolling rods 26 , be recorded at the same time. Each of the component to be detected is thus recorded only once each pass of the roll bar carpet 22. In this way, a total of one processing time can be reduced.

The control / evaluation devices used, for example the control / evaluation devices 40, the central control device 60 and any other control / evaluation, may be implemented as separate units or at least partially combined and / or common components realized.

LIST OF REFERENCE NUMBERS

10

Press

12a, 12b

Endless steel belts

14a, 14b

drive drums

16a, 16b

idlers

18

pressed material

20

production direction

21

press plate

22a, 22b

Roll bar carpets

24

Endless cable carriers

26

roll bars

28

bending rods

29

shifted bending rod

30

bearing sleeves

32a, 32b

Pressing / heating plates

34

monitoring device

36

detector systems

38

Optical detectors

40

Control / evaluation devices

42

trigger

44

light sources

46

images

48

chain links

50

picture details

52

running directions

54

lengths

56

spread

58

deflector

60

Central control device

62

Chain zero point mark

64

idlers

65

missing carrying role

66

bending clips

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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 202014104140 U1 [0004]

Claims (15)

Method for monitoring at least one component (62) and / or component type (26, 28, 30, 48, 58, 64, 66) of a roll bar carpet (22a, 22b) of a continuous press (10) for producing press plates (21), in particular material plates made of wood and / or other renewable agricultural products such as chipboard, fiber, straw and chipboard plates, and plastic plates, characterized in that at least one spatial area, the at least one component (62) and / or component (26, 28 , 30, 48, 58, 64, 66) under normal conditions, is detected by means of at least one optical detector (38) as a two-dimensional optical image (46), at least one actual state of at least one defined image section (50) of the image (46 ) is compared with a predetermined desired state, if any deviations of the at least one actual state of the desired state exceed a predetermined limit, at least one warning message ore will be. Method according to Claim 1 , characterized in that by means of the at least one detector (38) at least one spatial area with at least one component (62) and / or a component type (26, 28, 30, 48, 58, 64, 66) in the form of bending bars, bending bar clips , Rolling rods, carrying rollers, chain links, deflectors, at least one zero chain mark, at least one sprocket is detected. Method according to Claim 1 or 2 , characterized in that at least one state of at least one image section (50) is represented by a degree of blackening, a brightness, a contrast profile, at least one dimension, at least one position of the at least one component (62) and / or component type (26, 28, 30, 48 , 58, 64, 66) or the like. Method according to one of the preceding claims, characterized in that states of a plurality of image sections (50) are monitored. Method according to one of the preceding claims, characterized in that at least one image (46) is detected while the roll bar carpet (22a, 22b) is running. Method according to one of the preceding claims, characterized in that at least the image acquisition with a running speed of the roll bar carpet (22a, 22b) is synchronized. Method according to one of the preceding claims, characterized in that in at least one image (46) a plurality of components (26, 28, 30, 48, 58, 64, 66) of a kind, in particular a plurality of rolling rods and / or a plurality of bending rods and / or a plurality Chain links at least one guide chain (24) of the roll bar carpet (22a, 22b) are detected. Method according to one of the preceding claims, characterized in that, when the roll bar carpet (22a, 22b) is running, a plurality of images (46) are successively detected such that at least one component (62) is contained on a plurality of images (46). Method according to one of the preceding claims, characterized in that at least one image cutout (50) with a defined length (54) extending in the running direction (52) of the roll bar carpet (22a, 22b) and / or one transverse to the running direction (52) of the Rolling rod carpet (22a, 22b) extending defined width (56) is given. Method according to one of the preceding claims, characterized in that as a result of the warning, the at least one corresponding image (46) is stored, an optical and / or acoustic signal is output and / or a corresponding functional sequence of the press (10) is affected. Monitoring device (34) for at least one component (62) and / or component type (26, 28, 30, 48, 58, 64, 66) of a roll bar carpet (22a, 22b) of a continuous press (10) for producing press plates (21 ), in particular material plates made of wood and / or other renewable agricultural products such as chip, fiber, straw and Schnitzelplatten, and plastic plates, characterized in that the monitoring device (34) has at least one two-dimensional optical detector (38) which is arranged or at least one spatial region through which the at least one component (62) and / or component type (26, 28, 30, 48, 58, 64, 66) passes under normal conditions, may be formed as a two-dimensional image (46). can be detected, the monitoring device (34) at least one control and / or evaluation device (40), with the at least one image section (50) of the image (46) can be defined with the a desired state of the at least one image section (50) is predetermined and with which an actual state of the at least one image detail (50) can be compared with the desired state and with the at least one control and / or evaluation device (40) at least A warning message can be generated if any deviations of the at least one actual state from the desired state exceed a predetermined limit. Monitoring device after Claim 11 , characterized in that at least one synchronization device (42) is provided, with which at least one detector (38) and a running speed of the roll bar carpet (22a, 22b) can be synchronized. Monitoring device after Claim 11 or 12 , characterized in that the at least one detector (38) is designed and / or arranged so that several components (26, 28, 30, 48, 58, 64, 66) of a type can be detected simultaneously with it. Monitoring device according to one of Claims 11 to 13 , characterized in that the at least one control and / or evaluation device (40) is operatively connected to a control device of the at least one detector (38) and / or a control device (60) of the continuously operating press (10). Continuously operating press (10) for the production of press plates (21), in particular material boards of wood and / or other renewable agricultural products such as chip, fiber, straw and chipboard, and plastic sheets, wherein the press (10) at least one roll bar carpet (22a ,, 22b) 22b) and at least one monitoring device (34) for at least one component (62) and / or type of component (26, 28, 30, 48, 58, 64, 66) of the at least one roller bar carpet (22a, characterized in that in that the monitoring device (34) has at least one two-dimensional optical detector (38) which is or can be arranged such that at least one spatial area thereof is defined by the at least one component (62) and / or component type (26, 28, 30 , 48, 58, 64, 66) under normal conditions, as a two-dimensional image (46) can be detected, the monitoring device (34) at least one control and / or Auswerteeinrichtu ng (40), with which at least one image section (50) of the image (46) can be defined, a desired state of the at least one image section (50) is predetermined and an actual state of the at least one image section (50) with the Target state can be compared and at least one warning message can be generated with the at least one control and / or evaluation device (40), if any deviations of the at least one actual state of the desired state exceed a predetermined limit.

Images