Carding machine
Direct drum temperature measurement with redundant sensors and couplers addresses inaccuracies in carding machines, ensuring precise gap adjustment and preventing collisions.
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Patents
- Current Assignee / Owner
- TRÜTZSCHLER GRP SE
- Filing Date
- 2023-07-11
- Publication Date
- 2026-07-01
Smart Images
Figure IMGF0001 
Figure IMGF0002 
Figure IMGF0003
Abstract
Description
[0001] The present invention relates to a carding machine with an inlet side for fiber flakes, wherein the carding machine is configured to feed the fiber flakes to a rotating drum by means of at least one pre-tearer. On the drum, the fiber flakes are broken down, aligned, and cleaned between fixed carding elements and circulating cover bars down to the individual fiber. The resulting fiber mat is transferred from the drum to a receiver, to which a device for converting the fiber mat into a fiber sliver is arranged.
[0002] According to the current state of the art, traveling carding machines are known that essentially consist of a large main cylinder, the drum or tambour, on which fibers are carded by a specific number of traveling cards and fixed carding elements. Depending on the carding machine design, an adjustable carding gap size of 3 / 1000" [inch] to 12 / 1000" [inch] is possible. With such small gaps between the carding elements, contact between the components can cause significant damage, so the expansion of the drum due to centrifugal force and the thermal expansion of all components must always be monitored and continuously assessed. As the drum speed increases and the production of fibers to be processed increases, the drum temperature also rises. Therefore, it is necessary to continuously monitor the actual drum temperature in order to indirectly calculate the carding gap using an empirically determined formula.
[0003] In this state-of-the-art method, the temperature of a stationary aluminum profile positioned very close to the drum is not measured. This stationary profile is located in the upper gap between the drum and the carding end. One or more temperature sensors can be distributed across the working width or drum width within this profile. The profile heats up in a manner very similar to the drum's temperature behavior as soon as the carding machine is in operation. For the heated operating state, this temperature reading is sufficient for determining the carding gap. However, this level of accuracy is only suitable for continuous operation as long as fibers are being processed and the drum maintains the profile's temperature. If the material feed is interrupted, the lighter aluminum profile cools down faster than the heavier steel drum.This effect is particularly pronounced during the long cooling phase after the drum is switched off. When calculating the carding gap, this leads to deviations from the actual conditions in the machine, which can tempt the operator to set the carding gap narrower, thus potentially causing a collision between the drum's carding plates and the traveling cover.
[0004] The US 7,735,200 reveals the use of temperature sensors on the side plate of the carding machine and in the gusset between the pickup and the drum within the nonwoven guide profile.
[0005] In the DE 102006014419 A1 The drum is heated externally to adjust or standardize the carding gap. A housing containing inductive heat sensors is attached to an extension of the side plate. The corresponding temperature sensors are located on the underside of the card.
[0006] in the US4,105,896 A drum for treating textile webs is disclosed, in which a temperature sensor is arranged inside the drum, either at or within the drum base. Data transmission occurs via sliding contacts or contactless transmission located on or near the shaft. The temperature sensor may be arranged within a protective tube.
[0007] The object of the invention is to further develop a carding machine in which the temperature of a drum is measured more precisely. The drum can be designed as a tambour, pre-tearing roller, or pickup roller.
[0008] This problem is solved starting from a carding machine according to the preamble of claims 1 and with the characterizing features.
[0009] Advantageous embodiments of the invention are specified in the dependent claims.
[0010] The carding machine comprises a drum with a drum shell and two drum ends, the drum being rotatably mounted in a bearing by means of two pins. Furthermore, the carding machine has at least one sensor for determining the temperature of the drum shell, which is arranged either inside the drum shell or on the drum shell in the interior of the drum. The at least one sensor is connected by means of at least one electrical or data line to a coupler configured to transmit the sensor data to a carding machine controller.
[0011] The invention is based on the idea that direct temperature measurement of the drum shell is more accurate, particularly during the ramp-up and ramp-down of the carding machine. The temperature change is detected immediately. For this purpose, the at least one sensor is arranged directly or indirectly on the drum shell, for example via a receiving socket, so that the sensor has direct contact with the drum shell. Alternatively, the sensor can also be arranged in a guide element or in the receiving socket, in which case the temperature of the drum shell is only transmitted to the sensor via the guide element or the receiving socket. The sensor can be arranged inside the drum shell or in the interior of the drum on the drum shell. The coupler is designed to transmit the data from the at least one sensor from the rotating drum to a stationary counterpart.The coupler therefore does not necessarily have to be located in the area of one of the pins, but can also transmit the data wirelessly to a receiver that is fixed in the area of the side plate. The electrical or data line can simultaneously supply the sensor with electrical power. Continuous transmission of sensor data and the supply of electrical power are advantageously ensured when this occurs independently of the drum's rotational speed, and thus the coupler is located in the area of the pins.
[0012] The at least one electrical or data cable can be routed at least partially or completely inside the drum from the sensor to the coupler. If it is routed partially inside the drum to the coupler, the cable runs along the drum shell to the drum base, passes through it, and is then connected to the coupler. The advantage is the simple routing of the electrical or data cable, at least partially, on the outside of the drum base, which can also be routed with the sensor even when the drum is closed. A closed drum is defined as a carding drum in which a technician cannot position or attach anything inside the drum with their arms or tools. In this case, the drum bases have no recesses, as is the case with... Figure 4The illustration shows how a technician can access the interior of the drum with their arms or tools. Accordingly, part of the at least one electrical or data cable can be routed outside the drum, along the drum base, from the sensor to the coupler.
[0013] When the control system receives the sensor data on the current temperature of the drum, it is designed to control an actuator to adjust the distance of the drum to a carding element (moving lid, fixed carding element), a reject knife or another drum.
[0014] If the at least one electrical or data cable is guided inside the drum by means of at least one guide element, the electrical or data cable is completely protected against environmental influences, such as dust, fiber fly, moisture or during the assembly of other components.
[0015] The at least one sensor can be arranged within the at least one guide element or within a receiving socket. Both the guide element in the area of the sensor and the receiving socket have direct contact with the drum wall. The drum temperature can be transmitted indirectly to the sensor, or, in the case of the receiving socket, directly to the sensor if the sensor is in contact with the drum shell.
[0016] If the sensor temperature is to be transmitted to the control unit even when the drum is stationary, the at least one guide element, through which the electrical or data cable is routed, can be arranged with one end on or inside a bore of a pin. The guide element rotates with the drum pin in accordance with the drum's rotational speed.
[0017] The coupler can be located outside the drum in the area of a pin and can have at least one rotating element and at least one stationary element, wherein the sensor data is transmitted mechanically or inductively from the rotating element to the stationary element. This ensures that the sensor is always powered and its data is transmitted to the control system, even when the drum is stationary.
[0018] If at least one guide element is routed without interruption from a pin to the drum shell, then even with the drum closed, at least one sensor can be routed with the electrical line or the data line from outside the drum to its measuring point on the drum shell.
[0019] To prevent sensor failure or malfunction, at least one sensor is designed with redundancy. This means that when measuring the temperature at only one point on the drum shell, at least two sensors are always mounted at that point. If the drum temperature is measured at multiple points on the drum shell, the need for two sensors at one point is eliminated. The temperature differences, for example, across the working width or at different points on the drum circumference, are not so significant that a sensor malfunction or failure would not be immediately detected.
[0020] The multiple sensors can be distributed across the working width of the carding machine and / or arranged around its circumference. This allows for the determination of a temperature profile of the drum across the working width and / or the detection of temperature fluctuations at specific points on the drum shell, for example, if these are located in the main carding zone during full production.
[0021] If the sensor is arranged within the at least one guide element, at least a portion of the guide element, in which the sensor is located, will bear against the drum shell under preload. This results in easy initial installation when the drum is stationary, whereby, as the drum rotates, this portion of the guide element is constantly pressed against the drum shell due to centrifugal force.
[0022] A second end of the guide element can be arranged in or attached to the receiving bushing, or to the drum shell. The receiving bushing is preferably fixed to the inner drum shell, for example by welding, brazing, or bolting. The second end of the guide element can be connected to the receiving bushing, for example by a cone or a screw connection, so that the guide element is fixed at least on one pin and in or on the receiving bushing. Alternatively, the second end of the guide element can also be attached directly to the drum shell, for example by means of a screw connection.
[0023] If the sensor is not located inside the drum on the drum shell, at least one bore for receiving the sensor can alternatively be provided in the drum shell. Depending on the sensor's position across the working width, the bore can be a blind hole or a through hole, in which case the sensor is clamped or secured within the bore at the measuring position.
[0024] If multiple bores are arranged in the drum shell to accommodate at least one sensor, their depth can vary across the working width of the drum and / or around its circumference. This also allows for the creation of a complete temperature profile of the drum.
[0025] Alternatively, at least one guide element can be arranged along the drum shell, with at least two channels within the guide element for the separate accommodation of sensors, for example, for redundantly arranged sensors. If the channels are arranged at different depths within the at least one guide element, the position of the sensors can be varied across the working width of the drum. The arrangement of the bores in the drum shell has the advantage that the electrical or data cable does not need to be routed through the spigot. Installation is simpler from outside the drum. The same can be achieved with a guide element that is routed along the drum shell and the electrical cable is guided through a bore in the drum base to the coupler.
[0026] Further measures improving the invention are described in more detail below together with a description of a preferred embodiment of the invention with reference to the figures. They show:
[0027] Fig. 1 a side view of a schematically represented carding drum according to the prior art; Fig. 2 a sectional view through a carding drum with a first arrangement of a sensor for determining the drum temperature; Fig. 3 a schematic representation of an inductive coupler; Fig. 4 a perspective view of the interior of the drum; Fig. 4a a schematic representation of a first arrangement of the sensor in the drum; Fig. 4a a detailed view of the receiving socket with the sensor; Fig. 5 a further embodiment of the arrangement and fastening of the sensor in the interior of the drum; Fig. 5a an enlarged detail view of a detail of the Figure 5 ; Fig. 5 legs enlarged detail view of a detail of the Figure 5 Fig. 6 shows a further embodiment of the arrangement and fastening of the sensor inside the drum; Fig. 7 shows a further embodiment of the arrangement and fastening of the sensor in the drum shell; Fig. 8 shows a further embodiment of the arrangement and fastening of the sensor inside the drum; Fig. 9 shows a further embodiment of the arrangement and fastening of the sensor inside the drum; Fig. 10 shows a further embodiment of the arrangement and fastening of the sensor inside the drum.
[0028] Fig. 1Figure 1 shows a carding machine according to the state of the art, in which fiber flakes are guided via a chute to a feed roller 1, a feed table 2, via several pre-tears 3a, 3b, 3c, to the drum 4 or the tambour. On the drum 4, the fibers of the fiber flakes are parallelized and cleaned by means of stationary and rotating carding elements. The resulting fiber web is then conveyed via a take-up roller 5, a take-up roller 6, and several squeeze rollers 8, 9 to a web guide element 10, which forms the fiber web into a fiber ribbon with a hopper 11. This ribbon is then transferred via take-up rollers 12, 13 to a downstream processing machine or a can 15. The removal of the fibers from the take-up roller 5 is supported by a web guide profile 7, which is arranged below the take-up roller 6.Above the take-up roller 6 is a cleaning roller 6a, with which fiber residues are removed from the take-up roller 6 and fed to a suction device not otherwise specified.
[0029] Figure 2 Figure 1 shows a section through a drum 4 of a carding machine, which has a cylindrical drum shell 4a enclosing a cavity. The drum shell 4a is closed on both sides at its ends by two drum bottoms 4b, which can be reinforced by ribs 4c. The drum 4 has a first and a second pin 4d, 4e, which project centrally through the drum bottoms 4b into the drum 4 and are fastened to them on the inside. The pins 4d, 4e can be fastened to the drum bottoms 4b, for example, by welding, gluing, or mechanical screwing.
[0030] The in Figure 2The illustrated drum 4 is designed as an example of the carding drum's drumhead. The invention can also be used for the take-up unit 5 or the pre-tearers 3a, 3b, 3c, since the construction of these drums is identical despite their different dimensions. For these drums, the carding gap to the moving cover is not relevant, but rather the distance between drums 3a, 3b, 3c, 4, 5 to ensure the transfer of the fibers or the fiber nap. Since the distance between these drums can also be adjusted, knowledge of a precise temperature level is important for the carding machine's productivity.
[0031] At least one of the pins 4d, 4e can be configured to receive fastening elements and / or guide elements 21, which are configured to lead at least one electrical line and / or one data line out of the interior of the drum 4, so that at least one sensor 20 for determining the temperature of the drum 4 is arranged in the interior of the drum 4 and the data from the sensor 20 can be acquired outside the drum 4. The guide element 21 can be configured as a tube through which the at least one electrical line and / or data line can be routed. A first end of the guide element 21 can be arranged on or in the pin (4d or 4e) and a second end of the guide element 21 is arranged in the region of the drum shell 4a.This second end can have a receiving socket 22 which is connected to the drum shell 4a in the interior of the drum 4, for example by screwing, gluing, welding or soldering.
[0032] The at least one sensor 20 can preferably be designed as a resistance thermometer (temperature sensor), wherein a change in the temperature to be measured leads to a change in the electrical resistance of this sensor 20. For this purpose, two electrical conductors are required, the ends of which are routed to the outer or end face of a pin 4d, 4e, or within this area. The pin 4d, 4e has a central bore in which the guide element 21 is arranged and fastened. The guide element 21 can project through the bore of the pin 4d, 4e into the area of a coupler 24, or the guide element 21 can be fastened in or on the pin 4d, 4e, and the electrical conductor 23 or data conductor is routed through the bore of the pin 4d, 4e to a coupler 24. There, the ends of the electrical conductors 23 are, for example, inductively connected to a controller 30.An inductive coupler 24 can be arranged and used here, the rotating element of which is connected to the pin 4d, 4e. The stationary counterpart element can be arranged on the bearing housing or side plate of the carding machine. The inductive connection transmits the data from the at least one sensor 20 to the control unit 30 and simultaneously supplies the sensors 20 with electrical energy. Alternatively, the coupler 24 can also be designed as a mechanical solution that enables electrical contact via, for example, sliding contacts. Preferably, at least two sensors 20 can always be arranged inside the drum 4 to ensure redundancy. If a single sensor 20 were to fail unnoticed or deliver faulty data, this could immediately lead to total damage to the carding machine. If the temperature is measured at only one position inside the drum 4, preferably at least two sensors 20 are arranged at the same location.The measuring position of the sensor 20 is always located within the drum 4 on or in the drum shell 4a, and this position can vary in its arrangement, circumference, and location along the working width. Preferably, the at least one sensor 20 is arranged in the center of the drum shell 4a, i.e., across half the working width, since this is where the maximum temperature is found. Preferably, several sensors 20 can be arranged, distributed around the drum circumference and / or across the drum width, i.e., the working width.
[0033] Figure 2Figure 1 shows the arrangement of a guide element 21, which can be designed as a tube or hollow profile made of steel or plastic. The guide element 21 can accommodate at least one data line or electrical line 23 within its cavity, which establishes contact between the at least one sensor 20 and the coupler 24 on the pin 4d. The guide element 21 can be arranged and connected at a first end to or within the pin 4d, and at a second end to a receiving socket 22, which is connected to the drum shell 4a inside the drum 4. The temperature of the drum shell 4a is thus transmitted either directly or indirectly to the sensor 20 via the receiving socket 22. In this embodiment, the receiving socket 22 is arranged in a first quarter of the working width of the drum 4, measured from the drum base 4b.
[0034] Figure 3Figure 20 schematically shows the connection of a sensor 20 via an electrical line 23 or data line to an inductive coupler 24, which is configured to transmit the data from the sensor 20 to the controller 30. Simultaneously, the sensor is inductively supplied with electrical energy via the electrical line 23.
[0035] Figure 4 shows the interior of drum 4 from a perspective view, as well as the Figures 4a and 4bThe sensor 20 is mounted. A receiving socket 22 is welded to the drum shell 4a inside the drum 4. Alternatively, the receiving socket 22 can also be screwed into a blind hole in the drum shell 4a using a thread. A connecting element 25 in the form of a screw connection connects the guide element 21, which is designed as a tube, to the receiving socket 22. Two sensors 20, 20' are arranged inside the receiving socket 22, whose electrical conductor 23 or data conductor is guided through the guide element 21 to a coupler 24 (not shown) via the first pin 4d. Since the drum ends 4b have round recesses, the installation and possible replacement of defective sensors 20 is not a problem. Without recesses in the drum ends 4b, the guide element 21 is designed to receive the sensor(s) 20 with the electrical conductor 23 and mount them up to the area of the receiving socket 22.This requires guide elements 21 that extend continuously – i.e., without interruption – from the pin 4d, 4e to the measuring position on the drum shell 4a, so that the sensor(s) 20 can be placed and mounted in the tip of the guide elements 21 or in a connected receiving socket. When the drum 4 rotates, the sensor is pressed against the drum shell 4a by the centrifugal force. A stiffness of the electrical cable 23 or data cable used is advantageous, as it reinforces the fixation of the sensor(s) 20 in a predetermined position. Figure 4a also shows the connection of the guide element 21 with a connecting element 25 in the form of a screw connection to a pin 4d, 4e.
[0036] Figures 5 and 5aFigure 1 shows another arrangement for mounting and securing the sensor 20 inside the drum 4. Here, too, a guide element 21 in the form of a tube is connected to a pin 4d. The guide element 21 is bent into a half loop and clamped between a clamping element 26 and a rib 4c. The guide element 21 is thereby tensioned so that its end, which accommodates the at least one sensor 20, rests against the drum shell 4a with preload. This embodiment can also be implemented with both an interior of the drum 4 that is accessible for assembly and one that is inaccessible. In particular, by inserting the sensor 20 with its electrical conductor into the tubular guide element 21, sufficient force is applied to ensure that the sensor 20 rests permanently against the end of the tubular connecting element in the area of the drum shell 4a without the need for adhesive or bonding compound.In this embodiment, mounting a receiving socket 22 on the drum shell 4a is not necessary. In this embodiment, the sensor 20 is arranged centrally on the drum shell 4a, in the middle of the working width. Figure 5a One end of the guide element 21, with at least one sensor 20 integrated therein, rests under preload against the drum shell 4a. In the Figure 5b The end of the guide element 21, with at least one sensor 20 integrated therein, is attached to the drum shell 4a by means of a fastening element 27. The fastening element 27 can penetrate the drum shell 4a or be screwed into the drum shell 4a from the interior of the drum 4.
[0037] Figure 6 shows an extended embodiment of Figure 5, which differs only in that the guide element 21 is clamped to the opposing ribs 4c on both sides of the drum ends 4b. The guide element 21 rests against the drum shell 4a in an arc, with the end of the guide element 21 clamped to a rib 4c that is opposite the first pin 4d to which the guide element 21 is attached. The guide element 21 can again be tubular, with the tubular interior in this area, which rests against the drum shell 4a, being designed such that the sensor 20 terminates there when inserted. Thus, the guide element 21 can be provided with a plug or closure in this area against which the sensor 20 rests. The advantage of the embodiment of Figures 5 and 5aThe advantage lies in the fact that, during rapid acceleration of the carding machine, the free end of the guide element 21 is not displaced within the carding machine due to the acceleration. This can also be avoided by positioning the free end of the guide element 21 in the Figure 5b The guide element 21 is fixed to the drum shell 4a by a fastening element 27. The fastening element 27 can be a screw, or the guide element 21 can be fixed to the drum shell 4a over a longer length using an adhesive. Alternatively, the tubular guide element 21 can also be soldered, welded, or otherwise attached.
[0038] Figure 7Figure 1 shows a further embodiment of the arrangement and mounting of the sensor within the drum shell 4a, in which a bore 28 is arranged, for example, as a blind hole. In contrast to the previous embodiments, the sensor is not located inside the drum but is integrated into the drum shell 4a. The electrical connection can be made on an outer surface of the drum base 4b, for example, extending to the area of one of the pins 4d, 4e, so that a connection to a coupler 24 can be made, via which the sensor data is transmitted to the controller 30. The bore 28 can be arranged multiple times around the circumference of the drum 4. For example, three bores 28 can be arranged distributed around the circumference of the drum 4, which are then spaced at a circumferential angle of 120° to each other.A first bore 28 can have a depth of one-quarter of the working width, the second bore 28 a depth of half the working width, and the third bore 28 a depth of three-quarters of the working width of the drum 4 – each arranged from one side of a drum base 4b. This allows several sensors to be arranged offset across the working width of the drum 4 and / or simultaneously distributed around the circumference of the drum 4, enabling a very precise temperature profile to be determined. In this embodiment with several distributed sensors, the redundant assignment of at least two sensors to a measuring position is also unnecessary, since the failure or malfunction of a sensor is immediately detectable and the carding machine can be switched off.
[0039] In the Figure 8A tubular guide element 21 extends from the first pin 4d along a rib 4c inside the drum 4 to a region of the drum shell 4a. The electrical conductor 23 is routed within this guide element 21. A second guide element 29 is arranged across the working width of the drum 4 on the drum shell 4a. This second guide element 29 can be designed as a rectangular or round tubular profile made of aluminum or steel and is attached to two opposing ribs 4c. The second guide element 29 is slightly bent in the center under preload so that its center always rests against the drum shell 4a. The at least one sensor 20 can be positioned anywhere across the working width within the second guide element 29. It is preferably positioned wherever the guide element 29 – if applicable –with preload or attached to the drum shell 4a – in direct contact with the drum shell 4a. Since, in this embodiment, the first and second guide elements 21, 29 are mounted at a distance from each other inside the drum 4, installation is only possible with access to the interior of the drum 4. The first guide element 21 therefore only accommodates the electrical conductor 23, and the second guide element 29 accommodates at least one sensor with the further electrical conductor, which is inserted laterally and fixed. Preferably, the second guide element 29 can have several grooves or separate chambers in its cavity, so that several sensors 20 are arranged distributed across the working width, each in a groove or chamber. Instead of the rectangular guide element 29 shown here, it can also be designed as a tube.As an alternative to the embodiment with the first guide element 21, the drum 4 can have a bore in the drum base 4b through which the electrical line 23 or the data line of the sensor on the outside of the drum base 4b is guided to the coupler 23. This also makes assembly possible without access to the interior of the drum 4.
[0040] Figure 9Figure 1 shows a further continuous arrangement of the guide element 21 from the first pin 4d along a rib 4c to the center of the drum shell 4a. In this embodiment, the guide element 21 is tubular and allows the sensor 20 to be positioned up to the end of the guide element 21 with the drum's interior closed. The free end of the guide element 21 can be clamped into a conical receiving socket 22 or screwed in place using a connecting element 25. The receiving socket 22 can be welded or soldered to the drum shell 4a, for example. As in all previous embodiments, at least one sensor 20 can be arranged at a single position in the interior of the drum 4 or in the drum shell 4a, or several sensors 20 can be arranged distributed around the drum's circumference and / or across its working width.
[0041] In Figure 10A receiving socket 22 is arranged and attached to the drum shell 4a in the area of a drum base 4b. In this embodiment, the receiving socket 22 can accommodate two sensors 20, 20'. The cavities within the receiving socket 22 are filled with a thermal paste into which the sensors 20 are inserted. The electrical conductor 23 is guided through a tubular guide element 21, which is arranged along and attached to a rib 4c. The sensors 20 measure the temperature of the drum shell 4a at an outer area of the working width of the drum 4. It can be seen that the two sensors 20, 20' are redundantly configured. Other technical solutions for monitoring a sensor for faults are possible within the scope of the invention.In this embodiment, the electrical conductor 23 can also be guided through a bore in the drum base 4a from the outside along the drum base 4a to the coupler 24, so that the guide element 21 is not required here. Reference sign
[0042] 1 Feed roller 2 Feed table 3a, b, c Tearer 4 Drum 4a Drum shell 4b Drum bottom 4c Rib 4 First journal 4 Second journal 5 Take-off 5a Fitting 6 Take-off roller 6a Cleaning roller 7 Fleece guide profile 8 Squeeze roller 9 Squeeze roller 10 Fleece guide element 11 Hopper 12 Take-off roller 13 Take-off roller 14 Fixed carding element 15 Can 20 Sensor 21 Guide element 22 Mounting socket 23 Electrical cable 24 Coupler 25 Connecting element 26 Clamping element 27 Fastening element 28 Bore 29 Second guide element 30 Control
Claims
1. Carding machine with a cylinder (4) which comprises a cylinder jacket (4a) and two cylinder bottoms (4b), wherein the cylinder (4) is bearing mounted rotationally using two journals (4d, 4e), comprising at least one sensor (20) for determining the temperature of the cylinder jacket (4a), characterized in that the at least one sensor (20) is arranged inside the cylinder jacket (4a) or in the interior of the cylinder (4) on the cylinder jacket (4a), wherein the at least one sensor (20) is connected to a coupler (24) by at least one electrical cable (23) or data cable, the coupler being configured to transfer the data from the sensor (20) to a control system (30) of the carding machine.
2. Carding machine according to claim 1, characterised in that the at least one electrical cable (23) or data cable is routed from the sensor (20) to the coupler (24) at least partially or completely inside the cylinder (4).
3. Carding machine according to claim 2, characterised in that a part of the at least one electrical cable (23) or data cable is routed from the sensor (20) to the coupler (24) outside the cylinder (4) on the cylinder bottom (4b).
4. Carding machine according to claim 2, characterised in that the at least one electrical cable (23) or data cable is routed inside the cylinder (4) using at least one guide element (21, 29).
5. Carding machine according to claim 4, characterised in that the at least one sensor (20) is arranged inside the at least one guide element (21) or inside a locating bushing (22).
6. Carding machine according to claim 4, characterised in that at least one guide element (21) is arranged with the first end on or inside a drilled hole in the journal (4d, 4e).
7. Carding machine according to claim 1, characterised in that the coupler (24) is arranged outside the cylinder (4) in the area of a journal (4d, 4e), and comprises at least one rotating element and at least one fixed element, wherein the data from the sensor (20) is transferred mechanically or inductively from the rotating element onto the fixed element.
8. Carding machine according to one of claims 4 to 6, characterised in that the at least one guide element (21) is routed without interruptions from a journal (4d, 4e) to the cylinder jacket (4a).
9. Carding machine according to claim 1, characterised in that the at least one sensor (20) is configured redundantly.
10. Carding machine according to claim 1, characterised in that multiple sensors (20) are distributed over the working width of the carding machine and / or arranged over the circumference of the carding machine.
11. Carding machine according to claim 4, characterised in that at least a part of a guide element (21, 29) rests on the cylinder jacket (4a) with preload.
12. Carding machine according to one of the claims 4 to 6 or 8 to 11, characterised in that a second end of the guide element (21) is arranged or fastened in or on the locating bushing (22), or is fastened to the cylinder jacket (4a).
13. Carding machine according to claim 1, characterised in that the at least one drilled hole (28) is arranged in the cylinder jacket (4a) for supporting at least one sensor (20).
14. Carding machine according to claim 13, characterised in that multiple drilled holes (28) for supporting at least one sensor (20) are arranged in the cylinder jacket (4a), the depth of which in the working width of the cylinder (4) varies and / or the arrangement of the drilled holes (28) varies over the circumference of the cylinder (4).
15. Carding machine according to claim 4, characterised in that at least one guide element (21, 29) is arranged along the cylinder jacket (4a), wherein inside the guide element (21, 29) at least two ducts are arranged for separately supporting sensors (20).