Method and system for indirectly identifying wear of sliding energy-conducting chain

Abstract

The invention relates to a system (10) for indirect wear detection on an energy guide chain (12). The system (10) comprises a preferably immovably arranged sensor assembly (28) and an evaluation device (30), which is connected to the sensor assembly (28) in terms of signal technology. The sensor arrangement (28) is arranged and configured to generate a corresponding output signal depending on at least one characteristic of the chain link (26), the evaluation device (30) evaluates the output signal, the at least one feature appears or can be detected periodically, in particular repeatedly corresponding to the chain distance of the energy guide chain (12), when the energy guide chain is moved relative to the sensor assembly.

Description

Technical Field

[0001] The present invention generally relates to systems and methods for monitoring or condition monitoring (English: condition monitoring) of movable or dynamic pipeline guide devices, in particular energy guide chains, wherein the pipeline guide device is used to guide at least one pipeline, such as a cable, a hose or the like (typically on a movable facility or machine part) between a stationary fixed point and a relatively movable driving part.

[0002] In particular, the present invention relates to a system and a method for indirectly identifying wear during operation of a power supply chain, thereby enabling proactive maintenance.

[0003] In the method, the energy guide chain typically comprises a stationary lower section, a movable upper section and a deflection arc that moves therebetween. The invention relates in particular to an energy guide chain with a sliding upper section for long travel paths. Background Art

[0004] In order to identify wear, some solutions are known, in which special sensor modules are installed in the pipeline guide device or energy guide chain, such as those proposed in WO 2017 / 129805Al or WO 2019 / 201482 Al. However, these solutions require structural changes to the energy guide chain and require available installation space in the internal receiving space for the pipeline. In WO 2021 / 043668 Al, a different method for wear identification is proposed, but here structural measures for the energy guide chain are necessary, or this solution is only applicable to sliding energy guide chains with slides. In addition, EP 1 521 015 A2 envisages a solution for wear monitoring, in which wear detection, it is determined whether there is critical wear of the chain based on a wear element with a set breaking position. Here, the set breaking position is an indicator used for the critical wear state of the chain.

[0005] DE 20 2016 000 501 U1 envisages a solution such as WO 2017 / 129805 A1, in which the wear element is constructed as a transponder. DE 20 2016 107 317 U1 or WO 2018 / 115528 A1 envisages a solution in which the course of the chain is monitored, which is not easily suitable for wear identification. Summary of the invention

[0006] A structurally simple solution for detecting wear during operation of different energy supply chains is desirable, which can be used in as diverse a manner as possible and can be implemented with existing energy supply chains with as little structural measures or modifications or changes as possible. In particular, wear monitoring in relation to typical articulated connections between chain links should be implemented without having to modify the energy supply chain for this purpose.

[0007] This object is achieved by a system according to claim 1 or a method according to claim 11. Preferred embodiments or further developments are given in the dependent claims 2 to 10 or 11 to 20. Further features derive in particular from these dependent claims.

[0008] The invention is based on a system for indirect wear detection on an energy guide chain. Energy guide chains are typically used to guide at least one pipeline, such as a cable, a hose or the like, between a stationary fixed point and a carrier that can move relative to it, wherein the energy guide chain can be moved by forming a stationary lower section, a movable upper section and a deflection arc between them. In this case, the energy guide chain is typically designed and arranged with a sliding upper section, especially in the case of long travel paths. A sliding upper section is also understood here to be an upper section that rolls on the lower section.

[0009] It is proposed that the sensor arrangement comprises at least two sensors, which are each arranged and configured such that the sensors generate corresponding output signals as a function of at least one feature, the evaluation device evaluates the output signals, and the evaluation device is configured to detect and evaluate the temporal behavior of the output signals of the individual sensors, the at least one feature occurring or being detectable periodically, in particular repeatedly corresponding to the chain distance of the energy guidance chain, when the energy guidance chain moves relative to the sensor arrangement. Preferably, the system comprises a sensor arrangement, which is preferably stationary, and an evaluation device, which is connected to the sensor arrangement in terms of signal technology.

[0010] According to the invention, the sensor arrangement is arranged and configured to generate a corresponding output signal, which is evaluated by an evaluation device, as a function of at least one feature, which occurs, in particular is detectable, periodically, in particular repeatedly, corresponding to the chain pitch of the energy guidance chain, when the energy guidance chain is displaced, in particular moved, relative to the sensor arrangement. In particular, the invention allows the detection of the time behavior of the energy guidance chain to be carried out and advantageously evaluated by means of at least two sensors, for example to determine increased wear, which can be detected indirectly by a change in the time behavior.

[0011] In this case, the feature can be in particular a structural feature of the energy guiding chain, in particular of an individual chain link. This is preferably an intrinsic structural feature of the energy guiding chain, which occurs repeatedly in the longitudinal direction of the chain. In this case, the structural feature can be present repeatedly several times over the entire length of the chain, for example at each chain link or every second chain link, and can be provided, for example, over almost the entire length between the end fastenings.

[0012] Preferably, the system is arranged and configured for indirect wear detection on at least one link of the energy guiding chain, preferably for detecting wear at the connection of at least two links of the energy guiding chain. Preferably, the energy guiding chain has a large number (e.g. several dozen or significantly more than one hundred) of chain links, which are preferably all designed structurally identically (with so-called crank-shaped tongues or fish plates) or alternatingly designed structurally identically (e.g. with alternating inner and outer plates), with the exception of end-side end connection links, if necessary.

[0013] The invention offers numerous advantages. In particular, the wear state of individual chain links can be advantageously detected. This makes it possible to replace only parts of the energy guide chain in a targeted manner during maintenance or, for example, to replace highly loaded chain links with less loaded chain links during maintenance. Thus, for example, the overall service life or durability of the energy guide chain can be increased.

[0014] Preferably, the system for indirect wear detection on the energy transmission chain is arranged between a stationary fastening point of the energy transmission chain and a driver of the energy transmission chain that is movable relative thereto.

[0015] Typically, at least one end of the energy guide chain is movable, in particular displaceable, along the longitudinal axis of the energy guide chain, in particular movable, in particular displaceable relative to at least one other end of the energy guide chain. Preferably, the stationary fixing point of the energy guide chain is arranged at one end of the energy guide chain. Preferably, the driver of the energy guide chain is arranged at the other end of the energy guide chain. Typically, the driver constitutes one end of the energy guide chain. In imagination, the energy guide chain during movement can be divided into at least three different areas. Preferably, one of the at least three areas is a stationary lower section, which extends from one end of the energy guide chain, in particular the end on which the stationary fixing point is arranged, to the deflection arc, and the stationary lower section is in particular composed of a part of the energy guide chain extending parallel to the longitudinal axis of the energy guide chain. Preferably, the area of ​​the energy guide chain that constitutes the stationary lower section is only constructed to be stationary relative to the following end: at which the stationary fixing point is arranged.

[0016] The system for indirect wear detection is preferably arranged at a fixed point in an imaginary extension of the stationary lower section, so that the movable upper section moves past a sensor component of the system, in particular over it, and / or through a detection area of ​​the sensor component.

[0017] Thus, preferably, one of the at least three regions is a movable upper section, which extends from an end of the energy guide chain, in particular the end on which the driver is arranged, to a deflection arc, and which is formed in particular by a part of the energy guide chain extending parallel to the longitudinal axis of the energy guide chain. Preferably, one of the at least three regions is a deflection arc arranged between other regions of the energy guide chain, preferably the stationary lower section and the movable upper section, which deflection arc in particular forms an arc of the energy guide chain extending over an angular range of approximately 180° (the so-called deflection arc). Preferably, the upper section is supported on the lower section in a sliding manner. Alternatively or additionally, the upper section can be supported on the lower section in a rolling manner, in particular by means of at least one roller element, wherein a rolling upper section is understood here under the general term "sliding upper section".

[0018] Preferably, the system comprises a sensor assembly, which is arranged in particular immovably relative to the energy supply chain. Preferably, the system has an evaluation device which is designed and arranged separately therefrom. Preferably, the evaluation device is connected to the sensor assembly in terms of signal technology, in particular for data transmission, preferably at least from the sensor assembly to the evaluation device. Preferably, the sensor assembly transmits a continuous signal to the evaluation device during operation, for example in real time or as a periodic signal with a suitable transmission frequency of at least 20 Hz, preferably at least 50 Hz.

[0019] Preferably, the sensor arrangement is arranged and configured to generate a corresponding output signal as a function of at least one characteristic of the energy guidance chain, which output signal is evaluated by the evaluation device. Preferably, the sensor arrangement is configured to generate a corresponding output signal as a function of at least one characteristic of the energy guidance chain and to transmit it to the evaluation device. Preferably, the characteristic of the energy guidance chain occurs periodically, in particular repeatedly, corresponding to the chain pitch of the energy guidance chain, when the energy guidance chain is displaced, in particular moved, relative to the sensor arrangement. Preferably, the at least one characteristic of the energy guidance chain is a characteristic that is selected such that it occurs on each link of the energy guidance chain, in particular at the same position of the links in each case.

[0020] Preferably, the feature of the energy guidance chain is detected periodically, in particular reproducibly, in accordance with the chain length of the energy guidance chain when the energy guidance chain is displaced, in particular moved, relative to the sensor arrangement. For example, at least one feature of the energy guidance chain can be selected as a corresponding element of the chain link that is located inwardly relative to the deflection arc. For example, at least one feature of the energy guidance chain can be formed as a marking on the chain link.

[0021] Particularly preferably, a cross piece or a component of a cross piece is used as at least one feature of the energy guide chain, which is inherently arranged on each chain link or every nth chain link. In this case, the cross piece can be detected naturally or optically and / or electromagnetically without modification.

[0022] Additionally or alternatively, at least one feature of the energy supply chain can be provided as a feature that can be added with little effort. For example, a code such as, in particular, a barcode and / or a QR code can be formed on the chain link. For example, at least one feature of the energy supply chain can be designed as an optical element on the chain link, in particular for generating a light signal, preferably an electromagnetic signal, for example an electromagnetic signal in the visible spectrum, preferably in the infrared spectrum, particularly preferably outside the invisible spectrum.

[0023] Other designs are also conceivable. Thus, the sensor assembly can be configured to detect at least optical, preferably electromagnetic signals. For example, at least one feature of the energy guide chain can be configured as an acoustic element of a chain link, in particular for generating acoustic signals, for example in an audible signal spectrum, preferably in an inaudible signal spectrum, for example in the ultrasonic range, alternatively in the infrasound range. In particular, the sensor assembly can be configured to detect at least acoustic signals, in particular sound waves or structure-borne sound. Here, the inherent movement noise generated during movement can also be monitored without providing a special or additional acoustic element.

[0024] Preferably, the sensor arrangement is designed to monitor the energy guidance chain, in particular at least one characteristic of the energy guidance chain, preferably each chain link of the energy guidance chain, while the energy guidance chain is moving. Preferably, the sensor arrangement has at least one, preferably at least two sensors, which are designed to detect at least one characteristic of the energy guidance chain while the energy guidance chain is moving.

[0025] Particularly preferably, the evaluation device is designed to ascertain a distance between two chain links of the energy transmission chain from an output signal received by the evaluation device from the sensor arrangement.

[0026] The evaluation device is preferably designed to ascertain the instantaneous speed of a chain link, for example a single chain link or two chain links in each case, of the energy transmission chain from an output signal received by the evaluation device from the sensor arrangement.

[0027] Preferably, the evaluation device is designed to normalize the ascertained distance between each two chain links using the ascertained instantaneous speed, in particular the ascertained instantaneous speed of the chain link under consideration.

[0028] Particularly preferably, the evaluation device is designed to ascertain the state of wear of the energy transmission chain, in particular of the chain links of the energy transmission chain, from the ascertained, in particular standardized, spacings of the chain links of the energy transmission chain.

[0029] In one embodiment, the evaluation device is designed to determine a change in the instantaneous speed of a chain link of the energy transmission chain from an output signal received by the evaluation device from the sensor arrangement. The evaluation device can be designed to determine the energy transmission chain, in particular the wear state of the chain links of the energy transmission chain, from the determined change in the instantaneous speed of the chain links of the energy transmission chain. For example, when the direction of the energy transmission chain changes, the speed between chain links connected with play due to wear is slower than between chain links connected with play due to manufacturing tolerances in the new state.

[0030] For example, the wear state of a connection between two chain links can be inferred from the acceleration of an individual chain link.

[0031] In particular, a particularly advantageously relatively accurate determination of the speed and acceleration of the chain link can be achieved from the frequency, preferably the frequency change, of the signal of the sensor arrangement. In particular, a particularly advantageously particularly accurate determination of the speed and acceleration of the chain link can be achieved using frequency effects such as the Doppler effect. In particular, the evaluation device can be designed to determine the wear state of the energy guide chain, in particular the chain links of the energy guide chain, from the spacing, in particular the standardized spacing, of the chain links of the energy guide chain and from the determined change in the instantaneous speed of the chain links of the energy guide chain and preferably average them.

[0032] In this case, a “longitudinal axis” of an object is to be understood in particular as an axis which is parallel to the longest side of the smallest imaginary geometric cuboid which just completely surrounds the object and which preferably runs through the geometric center of the object, in particular the cuboid.

[0033] The evaluation device comprises in particular at least one processor and / or at least one processing unit, at least one memory unit and an operating, control and / or calculation program stored in the memory unit.

[0034] Preferably, at least two sensors, in particular sensor assemblies, are each arranged such that the sensors detect at least one feature which occurs periodically, in particular repeatedly corresponding to the chain pitch of the energy guidance chain, when the energy guidance chain moves relative to the sensor assembly. Preferably, at least two sensors, in particular sensor assemblies, are each configured to generate a corresponding output signal as a function of the at least one feature. Preferably, the evaluation device is designed to evaluate the output signals. Particularly preferably, the evaluation device is configured to detect and evaluate the temporal behavior of the output signals of the individual sensors.

[0035] The configuration according to the invention of the system for indirect wear detection on an energy transmission chain makes it possible to monitor the wear state of the energy transmission chain in an advantageously precise manner. In particular, an advantageously cost-effective early detection of an impending break in the energy transmission chain can be achieved.

[0036] It is further proposed that at least two sensors are spaced apart from each other in the direction of movement and are arranged and disposed such that each of the sensors detects the presence of a transverse web of the energy guide chain that passes by and outputs a corresponding output signal. Preferably, the sensor arrangement comprises a plurality of sensors spaced apart from each other in the direction of movement and arranged such that each of the sensors detects a feature of the energy guide chain that passes by, in particular the presence of a transverse web, as at least one feature of the energy guide chain and outputs a corresponding output signal. Preferably, the sensor arrangement comprises a plurality of, preferably at least two, in particular at least three, sensors that are preferably arranged spaced apart from each other in the direction of movement of the energy guide chain, preferably the sensors are arranged at least partially and / or at least completely offset relative to each other in the direction of movement of the energy guide chain. Preferably, each of the sensors respectively detects the presence of at least one feature of the energy guide chain that is under consideration, for example a transverse web that passes by. Preferably, each of the sensors outputs a corresponding output signal for the detected presence or absence of at least one feature that is identical to the energy guide chain (for example a transverse web that passes by). Advantageously, a long-term, uninterrupted detection of at least one feature of the energy guide chain can be achieved.

[0037] It is furthermore proposed that the sensor is designed as an electromagnetic proximity sensor, in particular as a capacitive proximity sensor. Preferably, the sensors of the sensor arrangement are designed to be functionally identical and / or structurally identical.

[0038] Alternatively and / or additionally, the sensor of the sensor arrangement can also be designed as an inductive proximity sensor, as an acoustic sensor, as a light barrier, in particular as an infrared light barrier or the like. Advantageously, a fast, in particular high-resolution monitoring of the energy supply chain can be achieved.

[0039] It is further proposed that at least two sensors of the sensor assembly are arranged at a spacing corresponding to the nominal (new) chain pitch and / or are arranged and configured to detect a feature related to the chain pitch. Preferably, at least two sensors are provided and / or the two sensors are arranged at a spacing corresponding to the nominal chain pitch, in particular related to the new chain pitch. Preferably, the sensor assembly has at least two sensors, which are arranged offset relative to each other along the direction of movement, in particular along the longitudinal axis of the energy guide chain, at a spacing corresponding to the nominal chain pitch, in particular related to the new chain pitch. Preferably, the system for indirect wear detection on an energy guide chain has an energy guide chain. Preferably, the geometric centers of the at least two sensors are arranged offset relative to each other along the direction of movement, in particular along the longitudinal axis of the energy guide chain, at a spacing corresponding to the nominal chain pitch, in particular related to the new chain pitch. Two chain links can be detected simultaneously, so that the spacing between the two chain links can be advantageously monitored.

[0040] In addition, it is proposed in a preferred development that the sensor assembly is arranged immovably next to the fixed point in the direction of movement of the energy guide chain. Preferably, the sensor assembly is immovably connected to a support unit for the energy guide chain, in particular a guide rail unit. Preferably, the sensor assembly for monitoring the upper section of the energy guide chain is arranged immovably next to the fixed point in the direction of movement of the energy guide chain. Typically, the immovable fixed point of the energy guide chain is arranged on the lower section of the energy guide chain. Preferably, the sensor assembly is arranged offset from the immovable fixed point in the direction of movement of the energy guide chain, in particular along the longitudinal axis of the energy guide chain. Preferably, the guide rail unit has at least two guide rails oriented parallel to the longitudinal axis of the energy guide chain, on which the energy guide chain is supported and the sensor assembly is mechanically connected to the guide rail or the sensor assembly is fixed in position relative to the guide rail. Preferably, the immovable fixed point of the energy guide chain is connected to the guide rail unit in an offset manner relative to the sensor assembly along the longitudinal axis of the guide rail unit. It is possible to achieve advantageous monitoring of the upper section when the energy guide chain moves.

[0041] It is further proposed that the evaluation device detects the instantaneous speed of the individual chain links from the behavior of the output signals over time and / or that the evaluation device comprises three sensors, wherein two sensors of the sensor assembly are arranged at a distance corresponding to the nominal chain pitch and a third sensor is provided for detecting the direction of movement. Preferably, the evaluation device detects and / or ascertains the behavior of the output signals of the sensor assembly, in particular of the individual sensors, over time and / or detects, preferably ascertains from the output signals, the instantaneous speed of the individual chain links. Preferably, the evaluation device ascertains the wear state of the connection of two chain links from the distance between two adjacent chain links, in particular in combination with the instantaneous speed. Preferably, the third sensor, in particular the third sensor of the sensor assembly, is designed to detect the direction of movement of the energy guide chain, which direction of movement in particular corresponds to the instantaneous direction of movement. Preferably, the third sensor, in particular the third sensor of the sensor assembly, is designed to directly detect the direction of movement of the energy guide chain, in particular the instantaneous direction of movement, if necessary, and transmit it to the evaluation device. Alternatively or additionally, the evaluation device can be designed to determine the movement direction of the energy guide chain, in particular corresponding to the instantaneous movement direction, from the output signal of the third sensor, optionally in conjunction with the output signal of one of the other two sensors. Alternatively or additionally, the instantaneous movement direction or the movement direction of the moving section of the energy guide chain (for example forward into the extended position or back into the retracted position) can also be determined by or based on one or both of the first-mentioned sensors.

[0042] The energy guide chain can advantageously be monitored independently of speed, in particular on the chain links which are most critical according to experience, for example on the first third of the chain length on the driver side. In the context of the structural features, inherent characteristics of the chain are preferably taken into account, which also occur repeatedly at least in this first third.

[0043] It is further proposed that the evaluation device evaluates the output signals of the sensor arrangement with respect to deviations from a prestored behavior or reference values ​​of the new energy supply chain. Preferably, the evaluation device comprises at least one memory module on which data with reference values ​​or standard values ​​corresponding to the new energy supply chain are stored, preferably prestored. This makes it possible to advantageously and quickly ascertain a defective behavior of the energy supply chain.

[0044] Furthermore, it is proposed that the evaluation device ascertains the spacing between successive chain links by measuring the time intervals between the detection of the periodic features and depending on the respectively detected instantaneous speed and preferably compares it with a predetermined nominal chain distance for the purpose of wear detection. Preferably, the evaluation device ascertains the standardized spacing between successive chain links by measuring the time intervals between the detection of the periodic features and depending on the respectively detected instantaneous speed. Preferably, the evaluation device compares each ascertained and in particular standardized spacing with a predetermined nominal chain distance in order to detect wear on the respective chain link. Advantageously, an advantageously precise detection of wear of the energy transmission chain can be achieved.

[0045] In addition, it is proposed that the evaluation device outputs maintenance advice based on the evaluation, especially in terms of the function of the spacing between the periodic features currently detected. Here, the maintenance advice can be output to a calculator of the upper level, for example. Preferably, the evaluation device has an output module, which is connected to the system of the upper level, for example, in data technology and / or can be constructed as an optical, acoustic and / or tactile output module. In addition, the output module can be constructed for acoustic output, for example. Preferably, the output module is at least partially constructed as a display screen and / or partially constructed as a loudspeaker. The maintenance advice can be output, for example, as an acoustic alarm sound. In addition or alternatively, the maintenance advice can be constructed as an optical alarm signal. Therefore, in particular, in addition to the notification or message of data technology, it is also possible to output advantageous optical and / or acoustic maintenance advice to the system of the upper level.

[0046] Furthermore, it is proposed that the sensor arrangement and the evaluation device detect a plurality of chain links that are connected to one another in order to detect wear in sections. Preferably, the sensor arrangement is designed to continuously or permanently monitor the energy guide chain while the energy guide chain is moving or operating, in particular to continuously detect at least one feature of the chain link at the chain link. Advantageously, permanent monitoring of the chain links can be achieved.

[0047] Furthermore, a method or a process is proposed for indirect wear detection in an energy supply chain.

[0048] The method proceeds from a method for indirect wear detection on an energy guide chain, which is used to guide at least one pipeline, such as a cable, a hose or the like, between a stationary fixed point and a carrier that can move relative to it, wherein the energy guide chain is movable by forming a stationary lower section, a movable upper section and a deflection arc between them, and the energy guide chain is in particular embodied and arranged with a sliding upper section, wherein a sensor component is provided, which is preferably arranged in a stationary manner, and an evaluation device is provided, which is technically connected to the sensor component in terms of signals.

[0049] It is proposed that the sensor arrangement comprises at least two sensors, which are respectively arranged and configured such that the sensors generate corresponding output signals as a function of at least one feature, which repeats periodically, in particular corresponding to the chain pitch of the energy guide chain, when the energy guide chain moves relative to the sensor arrangement.

[0050] - in at least one method step, a corresponding output signal is generated by the sensor arrangement as a function of at least one feature which occurs or is detectable repeatedly periodically, in particular corresponding to the chain pitch of the energy guidance chain, when the energy guidance chain is moved relative to the sensor arrangement, and the corresponding output signal is evaluated by the evaluation device, and

[0051] The evaluation device detects and evaluates the temporal behavior of the output signals of the individual sensors.

[0052] Preferably, in at least one method step, a corresponding output signal is generated by the sensor assembly as a function of at least one feature, which is evaluated by the evaluation device, the at least one feature occurring repeatedly and in particular corresponding to the chain pitch of the energy guidance chain when the energy guidance chain moves relative to the sensor assembly, in particular according to a planned movement, and is in particular detectable. Preferably, in at least one method step, the energy guidance chain moving past the sensor assembly is monitored by the sensor assembly. Preferably, in at least one method step, an output signal is generated by the sensor assembly each time at least one feature is detected on a chain link. Preferably, in at least one method step, at least each output signal is sent to the evaluation device. Preferably, in at least one method step, a continuous output signal is sent to the evaluation device, which continuous output signal assumes a defined value as a function of the presence of at least one feature and assumes a reference value otherwise.

[0053] It is further proposed that the sensors are arranged spaced apart from one another in the direction of movement and that in at least one method step, each sensor of the sensor arrangement detects the presence of a transverse web of the energy supply chain passing by, in particular detects it as at least one feature and outputs a corresponding output signal. Advantageously, a long-term, uninterrupted detection of at least one feature of the energy supply chain can be achieved.

[0054] Furthermore, it is proposed that in at least one method step a capacitive proximity sensor is used as the sensor of the sensor arrangement. Advantageously, a rapid and in particular high-resolution monitoring of the energy supply chain can be achieved.

[0055] Furthermore, it is proposed that at least two sensors of the sensor arrangement detect characteristics which are relevant to the chain length. Preferably, a third sensor is provided, the output signal of which is used, for example, directly or indirectly, for movement direction recognition.

[0056] Preferably, in at least one method step, at least two sensors of a sensor assembly and / or two sensors of a sensor assembly are used, which are arranged at a spacing corresponding to the nominal (new) chain pitch. Two chain links can be detected simultaneously, so that the spacing between the two chain links can be advantageously monitored.

[0057] Furthermore, it is proposed that in at least one method step a sensor arrangement is used which is arranged immovably next to a fixing point in the displacement direction of the energy supply chain. This allows advantageous monitoring of the upper section during displacement of the energy supply chain.

[0058] It is further proposed that in at least one method step, the evaluation device detects the instantaneous speed of the individual chain links from the temporal behavior of the output signals of the individual sensors. Preferably, in at least one method step, the temporal behavior of the output signals of the sensor assembly, in particular the individual sensors, is detected by the evaluation device and / or the instantaneous speed of the individual chain links is detected by the evaluation device from the output signals. Preferably, in at least one method step, the instantaneous speed of the individual chain links is determined by the evaluation device from the temporal behavior of the output signals of the sensor assembly, in particular the individual sensors. Preferably, in at least one method step, the spacings of the individual chain links from one another, in particular speed-normalized spacings, are determined by the evaluation device from the output signals of the sensor assembly, in particular the individual sensors (in particular from the temporal behavior of the output signals). Advantageously rapid, in particular high-resolution monitoring of the energy transmission chain can be achieved.

[0059] Furthermore, it is proposed that in at least one method step, the output signals of the sensor arrangement, in particular the individual sensors, are evaluated by the evaluation device with respect to deviations from a prestored behavior of the new energy supply chain. Preferably, in at least one method step, at least one spacing of the individual chain links to one another, preferably a speed-normalized spacing, is compared by the evaluation device with a prestored spacing of the new energy supply chain. Advantageously, speed-independent monitoring of the wear of the energy supply chain can be achieved, in particular at the chain links that are most at risk according to experience.

[0060] It is further proposed that in at least one method step, an advantageously rapid ascertainment of defective behaviors of the energy transmission chain can be achieved by the evaluation device measuring the time intervals between the detection of the periodic features and as a function of the respectively detected instantaneous speed ascertaining the distances between successive chain links and comparing them preferably with a predetermined, nominal chain distance for the purpose of wear detection.

[0061] Furthermore, it is proposed that in at least one method step, a maintenance recommendation is output by the evaluation device as a function of the evaluation, in particular of the currently detected spacings between the periodic features. Advantageously, the maintenance recommendation can be output visually and / or acoustically.

[0062] Furthermore, it is proposed that in at least one method step, a plurality of chain links following one another are detected by means of the sensor arrangement and the evaluation device in order to detect wear in sections. Advantageously, a continuous monitoring of the chain links can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Without limiting the generality of the above, further details and advantages of individual inventive aspects can be derived from the subsequent explanation of preferred embodiments according to the drawings. Features with corresponding or equivalent structures or functions have corresponding reference numerals and may not be repeated. Shown here:

[0064] Figure 1 : Side view of the energy guide chain with the sliding upper section;

[0065] Figure 2 : A perspective view of a preferred embodiment of a system having a sensor arrangement, which has a plurality of sensors which detect the presence of a transverse web of an energy guide chain which moves past;

[0066] Figure 3 : Schematic sensor assembly for multiple sensors with hole grids for different chain types;

[0067] Figures 4A-4D : the temporal behavior of a single sensor as the energy guide chain moves past; and

[0068] Figure 5 : Schematic of the method according to the present invention. DETAILED DESCRIPTION

[0069] Figure 1 -4 shows an implementation for implementing the following basic principle: the basic principle is to determine the wear by calculating the difference in the distance of the opening straps or cross straps between the pulling movement and the advancing movement of the energy guide chain, which is caused, for example, by increased screw drilling play in the joint connection of the chain links.

[0070] Figure 1 An energy guide chain 12 (hereinafter referred to as EFK) is shown. An end 13 of the EFK 12 can be moved along a longitudinal axis 14 of the EFK 12, in particular can be moved forward and backward, in particular can be moved forward and backward relative to at least one other end 17 of the EFK 12. A stationary fixing point 16 of the EFK 12 is arranged at one end 17 of the EFK 12. A driver 18 of the EFK 12 is arranged at the other end 13 of the EFK. The driver 18 forms the end 13 of the EFK 12. The EFK 12 is arranged such that when the driver 18 of the EFK 12 is moved, the EFK 12 forms at least three different regions 20, 22, 24, which in the illustrated embodiment correspond to a lower section, a deflection arc and an upper section.

[0071] One of the three regions 20, 22, 24 is a stationary lower section 21, which extends from the end 17 of the EFK 12, at which the stationary fastening point 16 is arranged, to the deflection arc 23, and which is formed by the part of the EFK 12 that extends parallel to the longitudinal axis 14 of the EFK 12. The region 20 of the EFK 12 that forms the stationary lower section 21 is designed to be stationary only relative to the end 17, at which the stationary fastening point 16 is arranged. One of the three regions 20, 22, 24 is a movable upper section 25, which extends from the end 13 of the EFK 12, at which the driver 18 is arranged, to the deflection arc 23, and which is formed by the part of the EFK 12 that extends parallel to the longitudinal axis 14 of the EFK 12. The upper section 25 is mounted on the lower section 21 in a sliding manner. One of the three regions 20, 22, 24 is a deflection arc arranged between the stationary lower section 21 and the movable upper section 25, which forms a 180° arc of the EFK 12. However, the invention can also be easily applied to an EFK 12 having a movable lower section 21 and a stationary upper section 25.

[0072] For guiding one or more pipelines, such as cables, hoses or the like, the EFK 12 has a largely known structure. The EFK 12 comprises a plurality of chain links 26, which are connected to one another in an articulated manner transversely to the longitudinal axis 14. By way of example, only three chain links 26 are provided with reference numerals. The EFK 12 has a movable end 13, at which a driver 18 is arranged. The EFK 12 has a fixed chain end 25, which is firmly flange-connected to a spatially fixed base 11 of an external support structure. In the active state, the driver 18 can be moved back and forth, for example, along the longitudinal axis 14 relative to a stationary fixing point 16, in particular in a movable state. Figure 1 The driver 18 is, for example, a movable connection point in a machine that is supplied with energy, data and / or media. The base 11 usually forms a fixed connection point. Alternatively, the driver 18 can also be vertically movable or movable along two axes. The EFK 12 forms a deflection arc 23, which moves in accordance with the movement of the driver. The deflection arc 23 is defined, for example, by a deflection roller or usually by a stop of a chain link 26 that limits the angle.

[0073] Figure 2 A schematic diagram of the principle of a system (generally denoted by 10) for indirect wear detection on an EFK 12 is shown. As essential components, the system 10 comprises: an EFK 12, an evaluation device 30 and a sensor assembly 28 arranged on the EFK 12. The three sensors 18, 18', 18" of the sensor assembly 28 are arranged in Figure 2 is purely demonstrative. Figure 3 The arrangement of the three sensors 18 , 18 ′, 18 ″ in the sensor arrangement 28 is described in more detail in FIG. The sensor arrangement 28 is connected to an evaluation device 30 for signal processing.

[0074] Figure 2 In particular, a system for indirect wear detection on an EFK 12 is shown. The EFK 12 is designed to guide at least one line 19, such as a cable, a hose or the like. The EFK 12 is designed to guide at least one line 19 between a stationary fixing point 16 and a driver 18 that can move relative to the fixing point. The EFK 12 is movable by forming a stationary lower section 21, a movable upper section 25 and a deflection arc 23 between them. The EFK 12 is designed and arranged so that the upper section 25 slides on the lower section.

[0075] The system 10 has a sensor assembly 28 arranged stationary and an evaluation device 30 which is connected to the sensor assembly in terms of signal technology, wherein the sensor assembly is arranged and configured to generate a corresponding output signal as a function of at least one feature, and the evaluation device evaluates the corresponding output signal, the at least one feature occurring periodically, in particular corresponding to the chain distance of the EFK 12, in particular being detectable when the EFK 12 is displaced, in particular moving, relative to the sensor assembly. The system 10 is designed for indirect wear detection on the chain links 26 of the EFK 12. The EFK 12 has, by way of example, twenty chain links 26, all of which are designed identically. The system 10 is designed for indirect wear detection of the wear of the EFK 12 between a stationary fastening point 16 of the EFK 12 and a driver 18 of the EFK 12 which is movable relative thereto.

[0076] The system 10 has a sensor arrangement 28 which is arranged stationary relative to the EFK 12. The system 10 has an evaluation device 30. The evaluation device 30 is connected to the sensor arrangement 28 in terms of signal technology for data transmission from the sensor arrangement 28 to the evaluation device 30.

[0077] The sensor assembly 28 transmits a signal, for example, continuously in real time or as a periodic signal with a transmission frequency of at least 20 Hz to an evaluation device 30. The sensor assembly 28 is arranged and configured to generate a corresponding output signal 34 as a function of at least one feature 32 of the EFK 12, and the evaluation device 30 evaluates the output signal 34 (see Figures 4A to 4D ).

[0078] The sensor assembly 28 is provided for generating a corresponding output signal 34 as a function of at least one feature of the EFK 12 and for transmitting it to the evaluation device 30. The feature 32 of the EFK 12 occurs periodically, in particular repeatedly, corresponding to the chain distance of the EFK 12, when the EFK 12 is displaced, in particular moved, relative to the sensor assembly 28. The feature 32 of the EFK 12 is a feature 32 that occurs on each chain link 26 on the EFK 12, in particular at the same position of each chain link 26. The feature 32 of the EFK 12 can be detected periodically, in particular repeatedly, corresponding to the chain distance of the EFK, when the EFK 12 is displaced, in particular moved, relative to the sensor assembly 28. For example, the feature 32 of the EFK 12 is configured as a corresponding subelement of the chain link 26. Here, the feature 32 of the EFK 12 is configured as a crosspiece 36 on the chain link 26, by way of example. The sensor assembly 28 is designed to monitor the EFK 12, in particular the feature 32 of the EFK 12, preferably each chain link 26 of the EFK 12, when the EFK 12 moves. The sensor assembly 28 includes three sensors 38, 39, 40, which are designed to detect the feature 32 of the EFK 12 when the EFK 12 moves. The sensors 38, 39, 40 are designed as capacitive proximity sensors. The sensors 38, 39, 40 of the sensor assembly 28 are all functionally identical and structurally identical.

[0079] The evaluation device 30 is designed to determine a distance 42 (see FIG. 4 ) between two chain links 26 of the EFK 12 from an output signal 34 received by the evaluation device 30 from the sensor arrangement 28. Figures 4A-4D The evaluation device 30 is designed to determine, for example, the instantaneous speed of a single chain link 26 of the EFK 12 from an output signal 34 received by the evaluation device 30 from the sensor assembly 28. The evaluation device 30 is designed to normalize an ascertained distance 42 between each two chain links 26 by means of the ascertained instantaneous speed of the chain links 26. The evaluation device 30 is designed to determine, from the ascertained, in particular standardized distance 42 of the chain links 26 of the EFK 12, a wear state of the EFK 12, in particular a chain link of the EFK 12. Additionally, the evaluation device 30 may be designed to determine, from the output signal 34 received by the evaluation device 30 from the sensor assembly 28, a change in the instantaneous speed of the chain link 26 of the EFK 12. Additionally, the evaluation device 30 may be designed to determine, from the ascertained change in the instantaneous speed of the chain link 26 of the EFK 12, a wear state of the EFK 12, in particular a chain link of the EFK 12.

[0080] The sensor arrangement 28 comprises a plurality of sensors 38 , 39 , 40 which are spaced apart from one another in the direction of movement 15 of the EFK 12 , in particular along the longitudinal axis 14 of the EFK 12 , and are arranged in such a way that each of the sensors 38 , 39 , 40 detects the presence of a transverse web 36 of the EFK 12 moving past, in particular detects it as at least one feature 32 of the EFK 12 , and outputs a corresponding output signal 34 .

[0081] The sensor arrangement 28 comprises three sensors 38, 39, 40 which are arranged spaced apart from one another along the movement direction 15 of the EFK 12, in particular along the longitudinal axis 14 of the EFK 12, in particular two of which are arranged partially offset from one another in the movement direction 15 of the EFK 12, and one of which is arranged completely offset relative to the other sensors in the movement direction 15 of the EFK 12. The movement direction 15 of the EFK 12 is oriented parallel to the longitudinal axis 14 of the EFK 12.

[0082] Each of the sensors 38, 39, 40 detects a feature 32 of the EFK 12, such as the presence of a cross piece 36 that is moving past. Each of the sensors 38, 39, 40 outputs an output signal 34 that corresponds to the presence or absence of a feature 32 of the EFK 12, such as a cross piece 36 that is moving past. Figures 4A-4D ).

[0083] At least two sensors 38, 39, 40 are provided and / or two sensors 38, 39, 40 are arranged at a distance corresponding to the nominal chain distance, in particular in relation to the new chain distance (see Figure 3 , 4A-4D). The sensor assembly 28 has at least two sensors 38, 40, which are arranged staggered relative to each other along the moving direction 15, in particular along the longitudinal axis 14 of the EFK 12, at a spacing 44 corresponding to the nominal chain distance, in particular related to the new chain distance. For the sensor 40 of the three sensors 38, 39, 40, different connection interfaces are provided on the sensor assembly depending on which type of energy guide chain the sensor assembly 28 is to monitor. The three sensors 38, 39, 40 are arranged staggered relative to each other so that when the EFK moves on the sensor assembly 28, there is always a sensor that generates an output signal different from the reference signal. Here, the reference signal is formed as "0" by way of example, and the output signal is formed as "1". Here, the signals of the sensors 38, 39, 40, in particular the output signals, are formed as binary by way of example.

[0084] For example, the system 10 has an EFK 12 in order to perform indirect wear detection on the EFK 12. The geometric centers of the two sensors 38, 40 are arranged offset relative to one another along the displacement direction 15, in particular along the longitudinal axis 14 of the EFK 12, at a spacing 44 corresponding to a nominal chain pitch, in particular associated with a new chain pitch (see Figures 4A-4D ).

[0085] The sensor assembly 28 is arranged immovably next to the fixing point 16 in the direction of movement 15 of the EFK 12. The sensor assembly 28 is immovably connected to the support structure, in particular the guide rail unit 46 (see Figure 2 ). In order to monitor the upper section 25 of the EFK 12, the sensor assembly 28 is arranged immovably next to the fixing point 16 in the movement direction of the EFK 12. The immovable fixing point 16 of the EFK 12 is arranged on the lower section 21 of the EFK 12. The sensor assembly 28 is arranged offset from the immovable fixing point 16 in the movement direction 15 of the EFK 12, in particular along the longitudinal axis 14 of the EFK 12. The guide rail unit 46 has two guide rails oriented parallel to the longitudinal axis 14 of the EFK 12, on which the EFK 12 is supported and to which the sensor assembly 28 is connected. The immovable fixing point 16 of the EFK 12 is connected to the guide rail unit 46 offset relative to the sensor assembly 28 along the longitudinal axis 47 of the guide rail unit.

[0086] Evaluation device 30 is designed to detect the temporal behavior of output signals 34 of sensor arrangement 28 , in particular of individual sensors 38 , 39 , 40 , and / or to detect, in particular to ascertain, instantaneous velocities of individual chain links 26 from output signals 34 .

[0087] The evaluation device 30 is designed to determine the wear state of the connection of two chain links 26 from a distance 42 between two adjacent chain links 26, in particular in combination with the instantaneous speed. The evaluation device 30 is designed to evaluate the output signal 34 of the sensor assembly 28 with respect to deviations from a prestored behavior of a new EFK 12. The evaluation device 30 has a memory module on which data of standard values ​​corresponding to a new EFK 12 are stored, in particular prestored. The evaluation device 30 is designed to determine the distance 42 between the chain links 26 that are connected to each other by measuring the time interval between the detection of the periodic features 32 and depending on the respectively detected instantaneous speed and preferably compare it with a predetermined nominal chain distance for the purpose of wear detection. The evaluation device 30 is designed to determine the standardized distance 42 between the chain links 26 that are connected to each other by measuring the time interval between the detection of the periodic features 32 and depending on the respectively detected instantaneous speed. The evaluation device 30 is designed to compare the respectively ascertained and, in particular, standardized distances 42 with a predetermined, nominal chain distance in order to detect wear on the respective chain link 26 .

[0088] The evaluation device 30 is designed to output a maintenance recommendation as a function of the currently detected spacing 42 between the periodic features 32. The evaluation device 30 has an output module 48, which is designed as an optical and acoustic output module 48. The output module 48 is partially designed as a display and partially as a loudspeaker. The maintenance recommendation is partially designed as an acoustic warning sound. The maintenance recommendation is partially designed as an optical warning signal.

[0089] The sensor assembly 28 and the evaluation device 30 are designed to detect a plurality of chain links 26 that are connected to one another for segmented wear detection. The sensor assembly 28 is designed to permanently monitor the EFK 12, in particular to detect at least one feature 32 of the chain links 26, while the EFK 12 is moving.

[0090] Figure 5 An exemplary sequence of a method 50 for indirect wear detection on an EFK 12 is schematically shown.

[0091] The method 50 has as a significant step a single duration method step 52. For simplicity of explanation, in the duration method step 52, the simultaneous and repeatedly or continuously repeated method steps are explained below as two individual substeps in an exemplary sequence.

[0092] In a method step, in particular a detection step 54, the EFK 12 moving past the sensor assembly 28 is monitored by the sensor assembly 28. In a method step, in particular a detection step 54, an output signal 34 is generated by the sensor assembly 28 each time a feature 32 on the chain link 26 is detected. In a method step, in particular a detection step 54, each generated output signal is sent to the evaluation device 30. In a method step, in particular a detection step 54, the continuous output signal 34 is sent to the evaluation device 30, which assumes a defined value, for example "1", as a function of the presence of the feature 32 and a reference value, for example "0" in other cases. In a method step, in particular a detection step 54, a capacitive proximity sensor is used as a sensor 38, 39, 40 of the sensor assembly 28. In a method step, in particular a detection step 54, each sensor 38, 39, 40 of the sensor assembly 28 detects the presence of the cross piece 36 moving past, in particular as a feature 32 of the EFK 12, and outputs a corresponding output signal 34. In a method step, in particular a detection step 54, at least two sensors 38, 39, 40 of the sensor arrangement 28 and / or two sensors 38, 39, 40 of the sensor arrangement 28 are used, which are arranged at a distance 44 corresponding to the nominal (new) chain pitch. In a method step, in particular a detection step 54, a sensor arrangement 28 is used which is arranged stationary in the direction of movement 15 of the EFK 12 next to the fixing point 16.

[0093] In a method step, in particular an evaluation step 56, the behavior over time of the output signals 34 of the sensor assembly 28, in particular the individual sensors 38, 39, 40, is detected by the evaluation device 30, and / or the instantaneous speed of the individual chain links 26 is detected by the evaluation device 30 from the output signals 34. In a method step, in particular an evaluation step 56, the instantaneous speed of the individual chain links 26 is ascertained by the evaluation device 30 from the behavior over time of the output signals 34 of the sensor assembly 28, in particular the individual sensors 38, 39, 40. In a method step, in particular an evaluation step 56, the spacing 42, in particular the speed-normalized spacing 42, of the individual chain links 26 is ascertained by the evaluation device 30 from the output signals 34 of the sensor assembly 28, in particular the individual sensors 38, 39, 40, and in particular the behavior over time of the output signals 34. In a method step, in particular an evaluation step 56, the output signals 34 of the sensor assembly 28 are evaluated by the evaluation device 30 with respect to deviations from a prestored behavior of the new EFK 12. In a method step, in particular an evaluation step 56, the evaluation device 30 compares at least one, preferably speed-normalized, spacing 42 of the individual chain links 26 from one another with a pre-stored spacing 44 of the new EFK 12. In a method step, in particular an evaluation step 56, the evaluation device 30 determines the spacing 42 between successive chain links 26 by measuring the time intervals between the detection of the periodic features 32 and as a function of the respectively detected instantaneous speed, and compares it in particular with a predetermined nominal chain distance for the purpose of wear detection. In a method step, in particular an evaluation step 56, the evaluation device 30 outputs a maintenance recommendation as a function of the currently detected spacing 42 between the periodic features 42.

[0094] In a method step, in particular an evaluation step 56 , a plurality of successive chain links 26 are detected by the sensor arrangement 28 and the evaluation device 30 for segmented wear detection.

[0095] In a method step, in particular a duration repetition step 52, a corresponding output signal is generated by the sensor assembly 28 as a function of at least one feature, which is evaluated by the evaluation device 30, the at least one feature occurring periodically, in particular repeatedly corresponding to a chain pitch of the EFK 12, and in particular being detectable, when the EFK 12 is moved, in particular moved in a planned manner, relative to the sensor assembly 28.

[0096] Reference numerals list

[0097] 10 System

[0098] 11 base

[0099] 12 Energy Guide Chain (EFK)

[0100] 13 end

[0101] 14 Vertical axis

[0102] 15 Movement direction

[0103] 16 fixed points

[0104] 17 end

[0105] 18 driving parts

[0106] 20 Areas

[0107] 21 lower section

[0108] 22 Area

[0109] 23 Turning Arc

[0110] 24 Areas

[0111] 25 Upper segment

[0112] 26 links

[0113] 28 sensor components

[0114] 30 Evaluation Devices

[0115] 32 Features

[0116] 34 Output signal

[0117] 36 horizontal joints

[0118] 38 sensors

[0119] 39 Sensors

[0120] 40 sensors

[0121] 42 spacing

[0122] 44 spacing

[0123] 46 rail units

[0124] 48 output modules

[0125] 50 Methods

[0126] 52 Duration

[0127] 54 Detection steps

[0128] 56 Evaluation Steps

Claims

1. A system (10) for indirect wear detection on an energy guide chain (12) for guiding at least one line (19), such as a cable, a hose or the like, between a stationary fixed point (16) and a driver (18) movable relative thereto, wherein: The energy guide chain (12) is movable by forming a stationary lower section (21), a movable upper section (25) and a deflection arc (23) therebetween, and the energy guide chain (12) is in particular designed and arranged with a sliding upper section (25), the system (10) comprising a preferably stationary sensor arrangement (28) and an evaluation device (30) which is connected to the sensor arrangement (28) for signaling purposes, It is characterized in that The sensor assembly (28) comprises at least two sensors (38, 39, 40), which are arranged and configured such that the sensors (38, 39, 40) generate corresponding output signals (34) according to at least one feature, the evaluation device (30) evaluating the output signals, the at least one feature occurring or being detectable periodically, in particular repeatedly corresponding to a chain distance of the energy guide chain (12) when the energy guide chain (12) moves relative to the sensor assembly (28), and The evaluation device (30) is provided for detecting and evaluating the temporal behavior of output signals (34) of individual sensors (38, 39, 40).

2. The system (10) according to claim 1, wherein: The sensors (38, 39, 40) are spaced apart from one another in the direction of movement (15) and are arranged and configured such that each of the sensors (38, 39, 40) detects the presence of a transverse web (36) of the energy guide chain (12) moving past and outputs a corresponding output signal (34).

3. The system (10) according to claim 2, wherein: The sensors (38, 39, 40) are designed as capacitive proximity sensors.

4. The system (10) according to claim 2 or 3, wherein: At least two sensors (38, 39, 40) of the sensor assembly (28) are arranged at a distance corresponding to a nominal (new) chain distance and / or are arranged and configured to detect features which are related to the chain distance.

5. The system (10) according to claim 2, 3 or 4, wherein: The sensor arrangement (28) is arranged stationary next to the fastening point in the direction of movement (15) of the energy supply chain (12).

6. The system (10) according to any one of claims 1 to 5, wherein: The evaluation device (30) detects the instantaneous speed of the individual chain links (26) from the temporal behavior of the output signal (34); and / or The evaluation device (30) comprises three sensors (38, 39, 40), wherein two sensors of the sensor assembly (28) are arranged at a distance corresponding to the nominal chain distance and the third sensor is provided for movement direction detection.

7. The system (10) according to any one of claims 1 to 6, in particular according to claim 6, wherein: The evaluation device (30) evaluates an output signal (34) of the sensor arrangement (28) with respect to deviations from a prestored behavior of a new energy supply chain (12).

8. The system (10) according to any one of claims 1 to 7, wherein: The evaluation device (30) determines the distance (42) between successive chain links (26) by measuring the time intervals between the detection of the periodic features (32) and as a function of the respectively detected instantaneous speed and compares it preferably with a predetermined, nominal chain distance for the purpose of wear detection.

9. The system (10) according to claim 8, wherein: The evaluation device (30) outputs a maintenance recommendation as a function of the evaluation, in particular as a function of currently detected distances between periodic features (32).

10. The system (10) according to any one of claims 1 to 9, wherein: The sensor assembly (28) and the evaluation device (30) detect a plurality of chain links (26) that are connected to one another in order to carry out a segmented detection and recognition.

11. A method (50) for indirect wear detection on an energy guide chain (12) for guiding at least one pipeline (19), such as a cable, a hose or the like, between a stationary fixed point (16) and a driver (18) movable relative thereto, wherein: The energy guide chain (12) is movable by forming a stationary lower section (21), a movable upper section (25) and a deflection arc (23) therebetween, and the energy guide chain (12) is in particular designed and arranged with a sliding upper section (25), wherein a sensor assembly (28) is provided, which is preferably arranged stationary, and an evaluation device (30) is provided, which is connected to the sensor assembly (28) in terms of signal technology, It is characterized in that The sensor assembly (28) comprises at least two sensors (38, 39, 40), which are arranged and configured such that the sensors (38, 39, 40) generate corresponding output signals (34) according to at least one feature, which occurs periodically, in particular repeatedly, corresponding to the chain distance of the energy guide chain (12) when the energy guide chain (12) moves relative to the sensor assembly (28). - in at least one method step, the sensor assembly (28) generates a corresponding output signal (34), the output signal being evaluated by the evaluation device (30) as a function of at least one such feature (32), which occurs or is detectable periodically, in particular repeatedly, corresponding to a chain distance of the energy guidance chain (12) when the energy guidance chain (12) is moved relative to the sensor assembly (28), and The evaluation device (30) detects and evaluates the temporal behavior of the output signals (34) of the individual sensors (38, 39, 40).

12. The method (50) of claim 11, wherein: The sensors (38, 39, 40) are arranged spaced apart from one another in the direction of movement (15), and in at least one method step, each sensor (38, 39, 40) of the sensor assembly (28) detects the presence of a transverse web (36) of the energy guide chain (12) moving past, in particular as at least one feature (32), and outputs a corresponding output signal (34).

13. The method (50) of claim 12, wherein: In at least one method step, a capacitive proximity sensor is used as the sensor (38, 39, 40) of the sensor assembly (28).

14. The method (50) according to claim 12 or 13, wherein: At least two sensors (38, 39, 40) of the sensor assembly (28) detect characteristics related to the chain distance, and a third sensor is preferably provided, the output signal of which is used for movement direction recognition.

15. The method (50) according to claim 12, 13 or 14, wherein: The sensor arrangement (28) is arranged stationary next to the fastening point (16) in the direction of movement (15) of the energy supply chain (12).

16. The method (50) according to any one of claims 11 to 15, wherein: In at least one method step, the evaluation device (30) detects the instantaneous speed of the individual chain links (26) from the temporal behavior of the output signals (34) of the individual sensors (38, 39, 40).

17. The method (50) according to any one of claims 11 to 16, in particular according to claim 13, wherein: In at least one method step, the output signal (34) of the sensor assembly (28), in particular of a single sensor (38, 39, 40), is evaluated by the evaluation device (30) with respect to deviations from a prestored behavior of a new energy supply chain (12).

18. The method (50) according to any one of claims 11 to 17, wherein: In at least one method step, the evaluation device (30) determines the spacing (42) between successive chain links (26) by measuring the time intervals between the detection of the periodic features (32) and as a function of the respectively detected instantaneous speeds and compares it preferably with a predetermined nominal chain distance for the purpose of wear detection.

19. The method (50) of claim 18, wherein: In at least one method step, a maintenance recommendation is output by the evaluation device (30) as a function of the evaluation, in particular as a function of currently detected distances (42) between periodic features.

20. The method (50) according to any one of claims 11 to 19, wherein: In at least one method step, a plurality of chain links (26) that are connected to one another are detected by a sensor arrangement (28) and an evaluation device (30) for segmented wear detection.

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