Method and device for metering continuous elongated elements

Abstract

A method and apparatus (99) for metering a continuous elongated element (900), for advancing the continuous elongated element (900) along a first path (110) in a feed direction (100), for feeding the continuous elongated element (900) at a feed speed to a feed point (A); for continuously optically detecting geometric information related to a cross-section of the continuous elongated element (900) in a plane perpendicular to the feed direction (100) at a detection point (R) along the first path (110); for continuously calculating a value representative of the area extent of the cross-section (200) based on the geometric information; and for continuously adjusting the feed speed based on the value representative of the area extent and a reference value of the feed flow rate of the continuous elongated element (900) at the feed point (A).

Description

Technical Field

[0001] The present invention relates to a method and an apparatus for metering a continuous elongated element. Background Art

[0002] During the production of tires, it is common to process or manipulate continuous elongated elements (such as strip elements), which are usually entirely composed of an elastomeric compound or contain an elastomeric compound and are combined with other elements. For example, it is well known to feed a continuous elongated element to a continuous processing machine to continuously process the material.

[0003] A so-called "continuous elongated element" refers to an element that is structurally tightly combined, whose longitudinal dimension (defining the length) is much larger than other dimensions (defining the width and thickness), and has a cross-section of any shape perpendicular to the longitudinal dimension (e.g., rectangular, circular, oval, irregular, etc.).

[0004] A so-called "feeding" refers to the transportation of an elongated element through a feeding point for any type of processing (such as mixing, extrusion, cutting, spreading or winding, connection with other elements, rolling, storage, etc.).

[0005] The "flow rate" of a continuous elongated element refers to the amount of the continuous elongated element passing through a certain point per unit time (e.g., expressed in volume or mass, and the volume or mass is interrelated through the density of the material making up the elongated element).

[0006] A so-called "metering a continuous elongated element" means continuously feeding such an element to a point for measuring and controlling the feeding flow rate (e.g., feeding to a station, such as preferably a continuous processing machine, but it can also be fed to a storage tray or a reel, etc.).

[0007] The expression "continuous processing machine" refers to a machine to which the material to be processed to obtain the desired product (such as a continuous elongated element and / or other compound components) is continuously fed (except for possible interruptions of the machine due to maintenance or changes in the formula of the desired product), and the product is discharged from it in a (substantially) continuous flow manner.

[0008] For example, a continuous elongated element can be directly fed to the feeding part of a continuous processing machine, where the feeding part usually includes (at least one) feeding screw, which captures the continuous elongated element and pulls the continuous elongated element into the mixing chamber of the processing machine. Usually, the continuous elongated element is fed to the feeding screw of the above-mentioned machine only by gravity and, for example, through a hopper.

[0009] The feeding of the continuous elongated element to the machine can be carried out with or without the combination of the feeding of other components.

[0010] The continuous processing machine includes a continuous mixer for producing compounds (such as masterbatch, intermediate compounds or final compounds), such as a twin-screw mixer (i.e., twin-screw), typically a co-rotating ring extruder (i.e., a mixer having a plurality of co-rotating ring-arranged screws), a planetary extruder (i.e., a mixer having a rotating central spindle and a plurality of surrounding planetary spindles, the planetary spindles meshing with the central spindle to rotate around the central spindle and rotating on their own as the central spindle rotates). Whether in the state of individual components (separated or combined), or in the composite state, or even in the cold state, these mixers are capable of vigorously mixing the introduced materials, and the moving elements of the mixer (such as screws and / or spindles) are characterized by conveying portions (such as helices) along their longitudinal extension to advance the materials and cause the materials to be dispersed by the mixing portions (such as compression crushing elements and shear crushing elements).

[0011] The continuous processing machine further includes extruders for producing semi-finished products used in tire production (such as tread strips, beads, etc.), such as single-screw extruders and twin-screw extruders (usually counter-rotating), extruders for semi-finished products (such as profilers), and feed extruders for calenders for fabric coating. Although these extruders inevitably achieve a low degree of mixing, they basically perform the function of pushing the compound towards the outlet. They are in fact usually not capable of producing compounds starting from individual components. In addition, it is well known to feed a continuous elongated element of an elastic compound to a forming drum to produce a green tire.

[0012] Terms such as "upstream", "downstream", "intermediate position, initial position, final position", "inlet", "outlet", etc. refer to the relative position or placement between elements and / or regions of a device with reference to the advancing direction of a continuous elongated element.

[0013] The expression "substantially perpendicular" with respect to geometric elements (such as straight lines, planes, surfaces, etc.) means that these elements (or elements parallel thereto and intersecting each other) form an angle between 90° - 15° and 90° + 15°, preferably between 90° - 10° and 90° + 10°, including the endpoints.

[0014] The expression "substantially parallel" with respect to the above geometric elements means that these elements (or elements parallel thereto and intersecting each other) form an angle between 0° - 15° and 0° + 15°, preferably between 0° - 10° and 0° + 10°, including the endpoints.

[0015] Terms such as "light", "bright", etc. refer to electromagnetic radiation that does not necessarily strictly belong to the optical wavelength band (i.e., the 400 - 700 nm wavelength band), but more generally falls within a broader neighborhood of the optical wavelength band, for example, from ultraviolet to infrared (for example, the wavelength of light radiation can be between approximately 100 nm and approximately 10 μm).

[0016] A "matrix camera" refers to a camera in which the pixels of its sensor are arranged in a rectangular matrix, and the lengths of the two dimensions of the rectangular matrix are comparable (for example, the difference between the two dimensions is less than an order of magnitude, such as in the form of 16x9, 4x3, or 3x2). By extension, a "matrix image" is a digital image obtained by a matrix camera.

[0017] The "optical axis" of a lens refers to the line along which there is rotational symmetry of the lens.

[0018] A "linear laser source" refers to a laser source capable of emitting a linear laser beam, that is, a laser beam located within the "propagation plane", whose propagation direction is the "propagation axis", which belongs to the propagation plane and passes through the laser source. When the linear laser beam intersects a physical surface with reflection / diffusion characteristics (such as the surface of an elongated element), a "laser line" is generated.

[0019] A "reflected laser line" is defined as the image of the laser line in the image obtained by the matrix camera.

[0020] Document JP2016043660A discloses a method for supplying a rubber material to an extruder, the method having: a measurement step for measuring the mass of the rubber material supplied to the extruder using a mass measurement device; and an adjustment step for adjusting the supply rate of the rubber material based on the result of the measurement step. Summary of the Invention

[0021] The applicant has realized that it is advantageous to be able to accurately meter continuous elongated elements.

[0022] For example, the applicant has realized that the quality of the compounds and / or semi-finished products produced by the above-mentioned continuous processing machines depends to a large extent on the flow rate of the continuous elongated elements fed to the continuous processing machines and the control accuracy of this flow rate. Especially in the production of compounds, the continuous elongated elements must be continuously metered together with other components, so it is very advantageous for the elongated elements to have a high metering accuracy.

[0023] The applicant has also realized that there may be some unevenness in the cross-sectional shape of the continuous elongated elements as they move along the longitudinal dimension, such as surface defects, such as surface voids and / or protrusions, and / or shape changes in the cross-sectional profile (thinning and / or widening, etc.).

[0024] Therefore, in this case, even if the feeding speed of the elongated elements is kept controlled, the actual feeding flow rate of the elongated elements is not controlled.

[0025] According to the applicant's findings, the metering method described in JP2016043660A is complex and / or inaccurate. For example, due to the linear extension of the track of the weighing element (e.g., between 0.5 m and 2 m), the result of this method is a low spatial resolution of the mass measurement per unit length, which in turn may lead to a low temporal resolution of the flow rate control.

[0026] Furthermore, in the method of JP2016043660A, the conveyor belt sections upstream and downstream of the measuring device can support part of the weight of the material part being measured, distorting the measurement result (e.g., returning a value lower than the actual value). On the other hand, by moving these sections of the conveyor belt away from the measuring device, the material suspended in the air upstream and downstream of the measuring device is partially weighed by the measuring device, thus overestimating the true value. In any case, the measurement does not return a true and / or accurate value.

[0027] Therefore, the applicant is faced with the problem of metering a continuous elongate element in a simple and / or accurate manner and / or with a high temporal resolution.

[0028] According to the applicant's findings, the above problem is solved by a method and a device for metering a continuous elongate element, wherein, while the continuous elongate element is being advanced, the area extension of the cross-section of the continuous elongate element is continuously and at least approximately calculated based on one or more consecutive optical measurements, and the feed speed is adjusted based on this area extension.

[0029] According to one aspect, the present invention relates to a method for metering a continuous elongate element.

[0030] The method includes advancing the continuous elongate element along a first track in a feed direction to continuously feed the continuous elongate element to a feed point at a feed speed.

[0031] Preferably, geometric information related to the cross-section of the continuous elongate element in a plane (substantially) perpendicular to the feed direction is continuously optically detected at a detection point along the first track.

[0032] Preferably, based on the geometric information, a value representing the area extension of the cross-section is continuously calculated.

[0033] Preferably, based on the value representing the area extension and a reference value of the feed flow rate of the continuous elongate element at the feed point, the feed speed is continuously adjusted.

[0034] According to one aspect, the present invention relates to a device for metering a continuous elongate element.

[0035] The device includes a propulsion system for advancing a continuous elongate element along a first path in a propulsion direction and for continuously feeding the continuous elongate element at a feed speed to a feed point.

[0036] Preferably, the device includes an optical detection system for continuously detecting, at a detection point along the first path, geometric information related to a cross-section of the continuous elongate element in a plane (substantially) perpendicular to the propulsion direction.

[0037] Preferably, the device includes a command and control unit connected to the propulsion system and the optical detection system.

[0038] Preferably, the command and control unit is programmed to continuously calculate, based on the geometric information, a value representative of the area extent of the cross-section.

[0039] Preferably, the command and control unit is programmed to continuously command the propulsion system, based on the value representative of the area extent and a reference value of the feed flow rate of the continuous elongate element at the feed point, to continuously adjust the feed speed.

[0040] The so-called "geometric information related to the cross-section" means information on geometric properties sufficient to calculate (at least approximately) the value of the area extent of the cross-section.

[0041] The so-called "continuous" of the operations related to the continuous elongate element means a close repetition in time of the operation in order to spatially resolve the elongate element in a suitable manner. For example, the operation is carried out at successive continuous points along the longitudinal distance of the elongate element that are centimeters or even less than one centimeter apart.

[0042] According to the applicant's findings, detecting geometric information related to the cross-section and calculating, based on the geometric information itself, a value representative of the area extent of the cross-section allows the measurement of the area extent to be obtained in a simple and / or fast and / or accurate manner.

[0043] Optical detection (and thus without contact) helps to obtain the required measurement accuracy of the cross-section while avoiding stopping and / or disturbing the propulsion of the elongate element during the detection process.

[0044] Detection carried out continuously during the propulsion of the elongate element can detect any morphological changes of the elongate element, such as any surface defects and / or changes in the cross-section shape, with high spatial resolution.

[0045] Using a value of the area extent of a cross-section that is substantially precise relative to the propulsion direction, and continuous adjustment of the feed speed based on this value and a reference value of the feed flow rate at the feed point, a high time resolution of the adjustment for the corresponding flow rate actually fed into the feed point can be obtained.

[0046] For example, in the case where the reference value is constant over time, the present invention can keep the actually fed flow rate substantially constant (e.g., as the value decreases along the extension of the cross-section, such as due to lack of material on the surface, voids, and / or tapering of the cross-section itself, the feeding speed of the elongated element increases, and vice versa).

[0047] In the case where the reference value changes during the feeding process, continuous adjustment also allows adaptation to these changes in the feeding flow rate requirements (e.g., in an instantaneous state).

[0048] A high time resolution of the adjustment of the actually fed flow rate is particularly advantageous for quickly and accurately adapting to changes in the area extension of the cross-section of the elongated element and / or changes in the above-mentioned flow rate requirements.

[0049] Therefore, the present invention achieves continuous metering of the elongated element in a simple, accurate manner and with high time resolution.

[0050] The present invention may have one or more of the following preferred features in one or more of the above aspects.

[0051] Typically, the feeding point is located at the outlet of the first channel.

[0052] Typically, the advancing direction is substantially consistent with the longitudinal dimension of the continuous elongated element.

[0053] Preferably, the cross-section of the continuous elongated element has a parallelogram profile, more preferably a rectangle and / or has a short side to long side length ratio greater than or equal to 10 (i.e., the element is ribbon-like).

[0054] Preferably, the continuous elongated element is advanced by gripping the long side (i.e., the axis of rotation of the roller is substantially parallel to the long side of the cross-section of the elongated element).

[0055] Typically, the continuous elongated element is composed of a uniform material.

[0056] Preferably, the continuous elongated element includes an elastic compound or consists entirely of an elastic compound.

[0057] Preferably, the instruction and control unit is programmed to perform one or more of the following operations of the method of the present invention.

[0058] Preferably, the theoretical value of the feeding speed is continuously calculated based on the ratio between the reference value of the feeding flow rate and the value representing the area extension of the cross-section.

[0059] Preferably, continuously adjusting the feeding speed includes setting the feeding speed equal to the theoretical value.

[0060] Preferably, the feed flow rate is a volumetric flow rate. Preferably, the reference value of the feed flow rate is calculated based on the reference value of the feed mass flow rate and the density (e.g., average) of the continuous elongate element. The desired mass flow rate is generally useful in the production process of the above compounds and / or the realization of semi-finished products.

[0061] Preferably, (preferably, based on the feed speed) the time delay taken by the cross-section from the detection point to the feed point is calculated.

[0062] Preferably, the feed speed is continuously adjusted also based on the time delay, and more preferably, the feed speed is continuously adjusted when the cross-section has reached the feed point. In this way, the elongate element is correctly fed to the feed point.

[0063] Preferably, the optical detection system includes a first optical detection device, which includes a matrix camera having an optical axis and a linear laser source capable of emitting a linear laser beam having a propagation axis (arranged at an angle, e.g., 40°, with respect to the optical axis). In this way, it is possible to obtain geometric information by laser triangulation, which is a non-contact technique that allows line scanning of the surface of the continuous element, i.e., a substantially accurate scan along the longitudinal direction.

[0064] Preferably, detecting the geometric information includes detecting at least a first part of the profile of the cross-section with respect to a reference height of the elevation profile. Preferably, the optical detection system, more preferably, the first optical detection device is configured (and / or positioned) to detect the (at least one) elevation profile of at least a first part of the profile of the cross-section with respect to a reference height.

[0065] In this way, the calculation of the value representing the area extension takes into account the actual configuration of at least a first part of the profile of the elongate element.

[0066] The so-called "elevation profile" refers to the trend of the height of each point of the profile with respect to the reference height representing zero height.

[0067] The so-called "part of the profile" refers to a part of the profile, rather than the whole.

[0068] Preferably, the first part of the profile of the cross-section belongs to the first surface of the continuous elongate element (when the continuous elongate element is in the first path). Preferably, the optical axis or the propagation axis is substantially perpendicular to the first surface of the continuous elongate element.

[0069] In one embodiment, only the elevation profile of the first portion of the cross-section contour is detected. Preferably, the optical detection system is configured to detect only the elevation profile of the first portion of the cross-section contour. In other words, there is no elevation profile detection for portions other than the first portion of the contour, nor are there detection devices other than the first optical detection device. Preferably, the first portion of the contour is a continuous portion. Preferably, the first portion of the contour extends at least one-third, more preferably at least 40%, of the entire extent of the contour.

[0070] In this way, the complexity of collecting and / or processing geometric information is limited because, for example, only a partial elevation profile can be detected and simple geometric shapes (such as break lines) can be used to reconstruct the remaining contour of the cross-section, making the calculation of the value of the area extension of the cross-section simpler and / or with a lower computational load.

[0071] Preferably, continuously calculating the value representing the area extension of the cross-section includes calculating the area targeted by the elevation profile of the first portion of the cross-section contour. In other words, the actual cross-section is bounded by break lines.

[0072] Preferably, when advancing a continuous elongated element, the (usually planar) surface of the continuous elongated element contacts the surface of a transport element (such as a roller or belt of a propulsion system), where the height of the surface of the transport element corresponds to the reference height.

[0073] Preferably, the optical axis of the matrix camera (in the absence of the elongated element) intersects the surface of the transport element of the continuous elongated element.

[0074] In this way, the elevation profile directly represents the local thickness of the elongated element.

[0075] In one embodiment, the optical detection system includes a second optical detection device, which includes a corresponding matrix camera having a corresponding optical axis and a corresponding linear laser source capable of emitting a corresponding linear laser beam having a corresponding propagation axis.

[0076] In one embodiment, detecting the geometric information includes detecting the elevation profile of the second portion of the cross-section contour relative to a corresponding reference height.

[0077] In one embodiment, the optical detection system, more preferably the second optical detection device, is configured (and / or positioned) to detect the elevation profile of the second portion of the cross-section contour.

[0078] In this way, the calculation accuracy of the value representing the area extension of the cross-section is further improved.

[0079] Preferably, the second part of the profile of the cross-section belongs to the second surface of the continuous elongate element (when the continuous elongate element is in the first pass).

[0080] Preferably, the second surface is arranged on the (substantially) opposite side of the continuous elongate element relative to the first surface. In this way, the detection of the elevation profiles of the two parts is sufficient to detect the elevation profile of the whole or almost the whole of the actual profile of the cross-section (for example, in the case of an elongate element having a strip shape, detecting the elevation profiles of the two surfaces of the element having a larger surface extension), which further facilitates the accuracy of the calculation of the value representing the area extension of the cross-section.

[0081] Preferably, at the detection point, the continuous elongate element is suspended in air. In this way, the optical detection is not obstructed by the structural components of the device (such as the rollers, belts, etc. of the propulsion system).

[0082] Preferably, the first part and possibly the second part of the profile of the cross-section extend along substantially the whole extension of the continuous elongate element in a direction perpendicular to the propulsion direction. In this way, during the propulsion of the elongate element, the optical detection system can detect the whole width (in the transverse direction) of the cross-section, which is useful for calculating the area extension of the cross-section.

[0083] Preferably, the same reference height is determined for the elevation profiles of the first part and the second part of the profile of the cross-section. In this way, since the two elevation profiles can easily be related to each other, it helps in calculating the value representing the area extension of the cross-section.

[0084] Preferably, detecting the elevation profile of the first part and / or the second part of the profile of the cross-section includes:

[0085] - illuminating the first part and / or the second part of the profile with a linear laser beam respectively;

[0086] - acquiring a matrix image of a matrix part of the surface of the continuous elongate element, the matrix part including the first part and / or the second part of the profile, wherein the matrix image includes laser lines reflected by the first part and / or the second part of the profile respectively;

[0087] - calculating the elevation profile by performing triangulation processing on the reflected laser lines.

[0088] Preferably, each matrix camera is suitable for acquiring a matrix image of a matrix part of the surface of the continuous elongate element, the matrix part including the first part or the second part of the profile of the cross-section, wherein the matrix image includes laser lines reflected by the first part or the second part of the profile respectively.

[0089] Preferably, the detection system is programmed to calculate the elevation profile of the first or second part of the profile by triangulation processing of the corresponding reflected laser line.

[0090] The above laser triangulation technique has proven to be particularly reliable for detecting the above surface defects and / or changes in cross-sectional shape, and its further advantage lies in the simplicity and / or accuracy and / or rapidity of geometric information detection.

[0091] Preferably, the first path includes a detection part containing detection points. Preferably, the entrance of the detection part coincides with the entrance of the first path.

[0092] In one embodiment, the detection part coincides with the first path (the exit of the detection part coincides with the exit of the first path).

[0093] In one embodiment, the first path includes a buffer part placed downstream of the detection part (and generally continuous with the detection part). Preferably, the exit of the buffer part coincides with the exit of the first path.

[0094] Preferably, the propulsion system includes a propulsion device configured to grip the continuous elongated element. Preferably, the propulsion device includes (at least one) motorized roller controllable by the instruction and control unit and additional rollers (optionally also motorized and controllable by the instruction and control unit), the additional rollers being arranged (substantially) parallel to the motorized roller and maintaining a thrust on the motorized roller.

[0095] Preferably, the propulsion device is placed at the exit of the detection part and is configured to pull the continuous elongated element along the detection part. In this way, a non-rigid elongated element, such as a strip element usually made of a raw elastic compound, can be moved.

[0096] In one embodiment, the propulsion device is adapted to (and / or arranged to) directly feed the continuous elongated element to the feeding point. In this way, the propulsion system is structurally simple.

[0097] In one embodiment, continuously adjusting the feeding speed includes continuously instructing the propulsion device.

[0098] In one embodiment, the propulsion system further includes a feeding device, which is different from and separate from the propulsion device. Preferably, the feeding device is configured to grip the continuous elongate element and is adapted (and / or arranged) to feed the continuous elongate element (preferably directly) to the feeding point. Preferably, the feeding device is placed at the outlet of the buffer section and is configured to pull the continuous elongate element along the buffer section. Preferably, the feeding device includes one or more features of the propulsion device.

[0099] In this way, the movement and feeding of the elongate element along the buffer section are decoupled from the detection section.

[0100] In one embodiment, continuously adjusting the feeding speed includes continuously instructing the feeding device.

[0101] In one embodiment, the tension of the continuous elongate element along the buffer section is continuously detected (with or without contact), and the tension detected along the buffer section is continuously compared with a corresponding reference tension. Preferably, based on the comparison between the tension detected along the buffer section and the corresponding reference tension, the propulsion device is continuously instructed. In this way, the propulsion device can be instructed based on the adjustment of the feeding speed, because the adjustment of the feeding speed may cause a change in the tension of the elongate element along the buffer section.

[0102] Preferably, a tension is applied to the continuous elongate element along the detection section.

[0103] Preferably, the device includes a first tensioning system for tensioning the continuous elongate element along the detection section.

[0104] In this way, the accuracy of the detection of geometric information (especially one or more elevation profiles) can be promoted and / or improved. For example, it is possible to reduce the possibility of the elongate element having folds and / or wrinkles, which may distort the detection of the elevation profile. In addition, in the case of detecting the elevation profiles of the first and second parts of the cross-sectional profile, for example, it is possible to stabilize the position of the elongate element in the air-suspended path of the elevation profile detection to limit the movement of the elongate element, which may introduce errors in the elevation profile detection.

[0105] Preferably, the instruction and control unit is connected to the first tensioning system.

[0106] Preferably, (e.g., the first tensioning system is configured and / or arranged to) continuously detect (with or without contact) the first tension of the continuous elongate element along the detection section and continuously compare the detected first tension with a corresponding reference tension. Preferably, based on the comparison between the detected first tension and the corresponding reference tension, the first tensioning system is continuously commanded.

[0107] Preferably, the first tensioning system includes a corresponding tension sensor adapted to continuously detect (with or without contact) the tension of the continuous elongate element. For example, the tension sensor can be mechanically contacting (such as a linear potentiometer) or optical (such as a laser device suitable for measuring distance).

[0108] Preferably, the first tensioning system includes a braking device for (at least partially) braking the advancement of the continuous elongate element along the detection section. Preferably, the braking device includes: a roller equipped with a brake disc, the brake disc being controllable by the command and control unit; and a corresponding additional roller, the additional roller being arranged (substantially) parallel to the roller equipped with the brake disc and maintaining a thrust thereon. Preferably, the braking device is arranged upstream of the advancement device, and more preferably, at the entrance of the detection section. In this way, the braking device is configured and reasonably arranged to be able to cooperate with the feeding device to tension the elongate element along the detection section of the first path, as described below.

[0109] Preferably, the command and control unit is programmed to continuously compare the detected first tension and the corresponding reference tension and, based on the comparison between the detected first tension and the corresponding reference tension, continuously command the first tensioning system (such as the braking device). In fact, the applicant has noticed that it is particularly advantageous to be able to maintain and / or continuously adjust the appropriate tension of the elongate element along the detection section to keep it near an ideal value suitable for limiting the above-mentioned disturbances of the elongate element.

[0110] Preferably, the continuous elongate element is tensioned along the detection section by pulling the continuous elongate element at one end of the detection section while braking the continuous elongate element at the opposite end. In this way, the elongate element is tensioned in a simple manner.

[0111] Preferably, the continuous elongate element is tensioned upstream of the detection section.

[0112] Preferably, the device includes a second tensioning system, more preferably arranged upstream of the first tensioning system, for tensioning the continuous elongated element upstream of the detection section. This second tensioning system pre-tensions the elongated element. The applicant has realized that pre-tensioning is beneficial for the stability (tension and / or position) of the elongated element along the detection section and for the detection of geometric information, which will be better explained hereinafter.

[0113] Preferably, the instruction and control unit is connected to the second tensioning system.

[0114] Preferably, (e.g., the second tensioning system is configured and / or arranged to) continuously detect a second tension of the continuous elongated element upstream of the detection section and compare the detected second tension with a corresponding reference tension. Preferably, based on the comparison between the detected second tension and the corresponding reference tension, the second tensioning system is continuously instructed.

[0115] Preferably, the second tensioning system includes a corresponding tension sensor suitable for continuously (with or without contact) detecting the tension of the continuous elongated element.

[0116] Preferably, the instruction and control unit is programmed to continuously compare the detected second tension with the corresponding reference tension and continuously instruct the second tensioning system based on the comparison between the detected second tension and the corresponding reference tension. The applicant has noted that it is particularly advantageous to maintain and / or continuously adjust the appropriate tension of the elongated element even upstream of the detection section so that the tension always remains close to the optimum value, thus contributing to the stable pre-tensioning function, as better explained hereinafter.

[0117] Preferably, the reference tension along the detection section is greater than the reference tension upstream of the detection section and / or in the buffer section. In other words, the device is configured and / or programmed to subject the elongated element to a greater tension along the detection section than it is subjected to upstream of the detection section and / or along the buffer section. A lower tension generally allows for slight bending (due to the weight of the elongated element) of parts of the elongated element, thus providing redundancy of the elongated element. This can mitigate and possibly eliminate any perturbations that the elongated element may be subjected to, which propagate along the elongated element and may reach the detection point. For example, parts of the elongated element upstream of the detection section and / or along the buffer section may experience a sudden acceleration (positive and / or negative, e.g., due to changes in adhesion between parts of the elongated element folded on itself and / or between the elongated element and the storage device and / or due to adjustment of the feed speed) parallel to the advancement direction, and this sudden acceleration is mitigated so as not to interfere with and / or distort the detection of geometric information (e.g., by vertically moving the elongated element, forming folds and / or wrinkles, etc.).

[0118] Preferably, the second tensioning system includes a moving device for moving the continuous elongated element upstream of the detection section. Preferably, the moving device is configured to be able to grasp the continuous elongated element. Preferably, the moving device includes a respective motorized roller that can be controlled by the instruction and control unit and a respective additional roller that is arranged (substantially) parallel to the respective motorized roller and maintains a thrust relative thereto. In this way, for example, the elongated element can be pulled into the device and unloaded / unrolled from a respective storage device (such as a tray or a reel).

[0119] Preferably, the device includes a centering system, which is more preferably arranged upstream of the detection section, for centering the continuous elongated element perpendicular to the advancing direction.

[0120] Preferably, the continuous elongated element is centered perpendicular to the advancing direction.

[0121] In this way, it helps the operation of one or more systems in the device (such as the propulsion system and the optical detection system).

[0122] Preferably, the centering system includes a pair of rollers, the respective rotational axes of which are (substantially) perpendicular to the motorized roller of the propulsion device and the roller with a brake of the braking device. In this way, the elongated element can be easily centered, for example, it can be folded onto an easily foldable plane (for example, a plane perpendicular to the larger extension plane for a substantially strip-shaped elongated element). BRIEF DESCRIPTION OF THE DRAWINGS

[0123] The features and advantages of the present invention will be further clarified by the following detailed description of some embodiments, which are presented by way of non-limiting examples of the present invention and with reference to the accompanying drawings, in which

[0124] Figure 1 schematically shows a first embodiment of a device for metering a continuous elongated element according to the present invention.

[0125] Figure 2 schematically shows a second embodiment of a device for metering a continuous elongated element according to the present invention.

[0126] Figure 3 schematically shows Figure 1 details of the device.

[0127] Figure 4 schematically shows a third embodiment of a device for metering a continuous elongated element according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0128] In the figure, the numeral 99 generally denotes a device for measuring a continuous elongated element 900. In this specification and in the figures, the same reference numerals are used for the same elements and also for their embodiments.

[0129] Exemplarily, the continuous elongated element comprises a strip element of a homogeneous raw elastic compound. For example ( Figure 3 ), the cross-section 200 of the continuous elongated element perpendicular to the advancing direction 100 of the continuous elongated element is substantially rectangular (neglecting possible defects), for example, the long side is about 50 cm long and the short side is about 3 cm high.

[0130] Exemplarily, the device 99 comprises a propulsion system 1 for advancing the continuous elongated element. For example, the propulsion system 1 comprises a propulsion device 2, which propulsion device comprises a motorized roller 3 and a further roller 4 arranged parallel to the motorized roller 3 and maintaining a thrust relative thereto.

[0131] Exemplarily, the propulsion system 1 comprises, respectively, in a first ( Figure 1 and Figure 3 ) and a second embodiment ( Figure 2 ), a respective one or two support rollers 5 for supporting the elongated element during propulsion.

[0132] Exemplarily, the device 99 comprises an optical detection system 6.

[0133] In a first embodiment ( Figure 1 and Figure 3 ), exemplarily, the optical detection system 6 only comprises a first optical detection device 7 (only shown schematically), comprising: a matrix camera 8 having an optical axis 300; and a linear laser source 9 adapted to emit a linear laser beam 400, the linear laser beam having a propagation axis 401, the propagation axis being arranged at an angle of about 40° relative to the optical axis 300. Exemplarily, the first optical detection device 7 is arranged above the continuous elongated element 900 (when the continuous elongated element is placed along the device).

[0134] In Figure 2 the second embodiment shown, the optical detection system 6 further comprises a second optical detection device 12 (shown schematically), comprising: a respective matrix camera having a respective optical axis 301; and a respective linear laser source adapted to emit a respective linear laser beam having a respective propagation axis 402.

[0135] Exemplarily, the second optical detection device 12 is arranged below the continuous elongated element 900.

[0136] Exemplarily, the device 99 comprises a first tensioning system 16, exemplarily comprising a tension sensor 17 of the optical type, for example a laser device suitable for measuring distances.

[0137] Exemplarily, the first tensioning system 16 includes a braking device 18 arranged upstream of the propulsion device 2. The braking device 18 includes, for example, a roller 19 equipped with a brake disc and a corresponding additional roller 20 arranged parallel to and maintaining a thrust with the roller 19 equipped with the brake disc.

[0138] In another embodiment, the braking device may include a motorized device as a brake. For example, the motorized device as a brake may include a corresponding motorized roller that can be controlled by an instruction and control unit and a corresponding additional roller arranged parallel to and maintaining a thrust with the corresponding motorized roller, wherein the corresponding motorized roller is mechanically connected to a gearbox to prevent any speed change of the motorized roller not caused by the instruction and control unit (e.g., to prevent the motorized roller from freely rotating under the dragging of the elongated element).

[0139] Exemplarily, the device 99 includes a second tensioning system 21, which is arranged upstream of the first tensioning system 16 and exemplarily includes a corresponding tension sensor 22 of the same type as the tension sensor 17 of the first tensioning system 16.

[0140] Exemplarily, the second tensioning system 21 includes a moving device 23 for moving the continuous elongated element 900. For example, the moving device 23 includes a corresponding motorized roller 24 and a corresponding additional roller 25, which is arranged parallel to and maintains a thrust with the corresponding motorized roller 24.

[0141] Exemplarily, the propulsion device 2, the braking device 18, and the moving device 23 are configured to be able to grasp the continuous elongated element. For this purpose, the surfaces (not shown) of the corresponding rollers in contact with the elongated element have appropriate surface treatments (such as knurling, embossing, etc.), aiming to increase their friction coefficients with the elongated element itself.

[0142] Exemplarily, the device 99 includes an instruction and control unit 26, which is connected to the motorized roller 3 of the propulsion device 2 and the first optical detection device 7, and is also connected to the second optical detection device 12 in the second embodiment.

[0143] Exemplarily, the instruction and control unit 26 is also connected to the roller 19 equipped with the brake disc of the braking device 18, each motorized roller 24 of the moving device 23, and the tension sensors 17, 22 of the first tensioning system 16 and the second tensioning system 21.

[0144] Exemplarily, each motorized roller 3, 24 of the propulsion device 2 and the moving device 23, and the roller 19 equipped with the brake disc of the braking device 18 can be controlled by the instruction and control unit 26.

[0145] Exemplarily, the device 99 includes a centering system 27, which is arranged upstream of the first track 110 and includes a pair of rollers 28, the pair of rollers having respective axes of rotation that are arranged vertically and perpendicular to the remaining rollers of the device 1 (the remaining rollers are all arranged horizontally).

[0146] In use, the device 99 can implement a method for metering a continuous elongate element 900.

[0147] Exemplarily, the continuous elongate element 900 is advanced along the first track 110 in a direction of advancement 100 for continuously feeding the continuous elongate element to a feed point A at a feed speed. Exemplarily, the advancement of the elongate element is achieved by gripping the face of the elongate element having a larger surface extension.

[0148] Exemplarily, the continuous elongate element is initially pulled out in the device 99 and is arranged between each pair of rollers that maintain a relative thrust until it reaches the feed point A. Exemplarily, the elongate element is arranged above each support roller 5, the support roller is not motorized, and is rotated by being dragged by the elongate element during advancement.

[0149] Exemplarily, the direction of advancement 100 is substantially aligned with the longitudinal dimension of the continuous elongate element 900, and the feed point A is located at the outlet of the first track 110 ( Figure 1 、 2 and 4).

[0150] Exemplarily, continuous optical detection is performed at a detection point R along the first track 110, and geometric information related to the cross-section 200 of the continuous elongate element 900 is detected.

[0151] Exemplarily, the first track 110 includes a detection portion 111, which includes the detection point R. In the first and second embodiments ( Figure 1 and Figure 2 ), the detection portion 111 is exemplarily consistent with the first track 110.

[0152] Exemplarily, the advancement device 2 is arranged at the outlet of the detection portion 111 and is configured to pull the continuous elongate element 900 along the detection portion 111.

[0153] In the first and second embodiments of the device 99, the advancement device 2 is adapted to and arranged for directly feeding the continuous elongate element 900 to the feed point A.

[0154] For example, the continuous elongate element 900 is centered perpendicular to the direction of advancement 100 by the centering system 27, which exemplarily performs a first 90° twist on the elongate element, and then together with the braking device 18 performs a second 90° twist on the elongate element (in the opposite direction to the first twist) to return it to the original plane.

[0155] Exemplarily, the braking device 18 is arranged at the entrance of the detection section 111.

[0156] Exemplarily, the continuous elongated element 900 is pulled at one end of the detection section by the propulsion device 2 while being braked at the opposite end by the braking device 18, so that the continuous elongated element is under tension along the detection section 111.

[0157] Exemplarily, the first tension of the elongated element along the detection section 111 is continuously detected without contact by the tension sensor 17 of the first tensioning system 16, and the tension sensor obtains the tension of the elongated element based on the position inferred by the tension sensor (in Figure 1 and Figure 2 , as the tension decreases, the elongated element will approach the tension sensor 17, and this displacement will be detected by the tension sensor). For example, the instruction and control unit 26 continuously compares the detected first tension with the corresponding reference tension, and continuously instructs the braking device 18 based on this comparison (for example, in the case of a decrease in tension, the instruction and control unit activates the brake to further stretch the elongated element with a certain traction force).

[0158] Exemplarily, the continuous elongated element 900 is also under the action of tension upstream of the detection section 111.

[0159] Exemplarily, the second tension of the continuous elongated element 900 upstream of the detection section 111 is continuously detected without contact by the tension sensor 22 of the second tensioning system 21, which is similar to that described previously for the detection section.

[0160] Exemplarily, the instruction and control unit 26 continuously compares the detected second tension with the corresponding reference tension, and continuously instructs the moving device 23 based on this comparison.

[0161] Exemplarily, the reference tension along the detection section 111 is greater than the reference tension upstream of the detection section, and the elongated element has a slight bend upstream of the detection section ( Figure 1 and Figure 2 ).

[0162] In the first embodiment, the geometric information of the detection cross-section 200 exemplarily includes only the first part 11 of the profile of the detection cross-section 200 detected by the first optical detection device 7 ( Figure 3 the dashed line in

[0163] Exemplarily, the first part 11 of the profile is a continuous part and extends approximately 40% of the entire extension of the profile of the cross-section.

[0164] Exemplarily, a first part 11 of the contour of the cross-section 200 belongs to a first surface 10 of a continuous elongated element 900. The first surface 10 coincides, exemplarily, with the upper surface of the elongated element.

[0165] Exemplarily, the linear laser beam 400 passes through the first surface 10 of the continuous elongated element 900 perpendicularly to the longitudinal dimension of the elongated element. For example, the propagation axis 401 of the linear laser beam is substantially perpendicular to the first surface 10 of the continuous elongated element.

[0166] In an alternative embodiment (not shown), the linear laser beam may pass through the elongated element at any angle with respect to the advancement direction. In this case, the geometric information of the cross-section on a plane perpendicular to the advancement direction can be deduced by appropriate trigonometric calculations (which are known per se and will not be further described).

[0167] In a first embodiment ( Figure 3 ), in order to detect the elevation profile of the first part 11 of the contour of the cross-section 200, exemplarily, the continuous elongated element is advanced and the flat surface (e.g., the invisible lower surface) is brought into contact with the surface 501 of the support roller 5, where, at the instant contact point between this surface and the elongated element, the height of the surface 501 corresponds to the reference height 500. For example, the optical axis 300 of the matrix camera 8 intersects the surface of the support roller 5 (in the absence of the elongated element), so that the elevation profile directly represents the local thickness of the continuous elongated element 900.

[0168] Exemplarily, detecting the elevation profile of the first part 11 of the contour of the cross-section includes:

[0169] - illuminating the first part with the linear laser beam 400 of the first optical detection device 7;

[0170] - obtaining a matrix image of a matrix part of the first surface 10 of the continuous elongated element by means of the matrix camera 8, which matrix part includes the first part 11 of the contour, where the matrix image includes the laser line reflected by the first part 11 of the contour (exemplarily, the reflected laser line coincides with the first part 11 of the contour);

[0171] - calculating the elevation profile by means of triangulation processing of the reflected laser line (thus enabling the detection of the depression C1 and the excess material C2 in the shown example).

[0172] Exemplarily, the calculation of the elevation profile is performed by the optical detection system 6, which system exemplarily includes its own internal processing unit (not shown) for such operations.

[0173] Exemplarily, the instruction and control unit 26 may include one or more computers (for the purposes of the present invention, the processing unit of the optical detection system may also be determined as part of the instruction and control unit 26, and the processing unit of the optical detection system is physically misaligned relative to the instruction and control unit but is connected thereto).

[0174] In a second embodiment, the geometric information of the detection section 200 includes the elevation profile of a second part (not shown) of the contour of the detection section 200 detected by the second optical detection device 12 relative to a corresponding reference height (not shown).

[0175] Exemplarily, the second part of the contour of the section belongs to a second surface (invisible) of a continuous elongated element. Exemplarily, the second surface is constituted by the lower surface of the continuous elongated element, and relative to the first surface 10, the second surface is arranged on the opposite side of the continuous elongated element 900. Advantageously, in the second embodiment ( Figure 2 ), the continuous elongated element is exemplarily suspended in the air at the detection point R.

[0176] Exemplarily, the propagation axis of the linear laser beam 402 of the second optical detection device 12 is perpendicular to the second surface.

[0177] Exemplarily ( Figure 2 ), the first optical detection device 7 and the second optical detection device 12 are arranged in such a way that the corresponding linear laser beams 400, 402 are aligned along the advancing direction 100 to facilitate the detection of the first part and the second part of the contour of the section.

[0178] Before detecting the elevation profile, in order to calibrate the first optical detection device 7 and the second optical detection device 12, a calibration element (for example, a plate not shown, which has narrow structural tolerances) is exemplarily arranged. Before the support rollers are occupied by the continuous elongated element, the calibration element is placed above the two support rollers 5, and the reference heights of the elevation profiles of the first part and the second part of the contour of the section 200 are respectively determined relative to the upper surface (for example, opposite to the support rollers) and the lower surface of the calibration element. The reference heights thus determined do not correspond to physical elements during the operation of the device. Therefore, once the calibration element is removed, the detection is not hindered by fixed structural components.

[0179] Exemplarily, the same reference height is determined for the elevation profiles of the first part and the second part of the contour of the section. For this purpose, exemplarily, two reference heights are determined according to the above-mentioned calibration element, and one (or both) of the two heights is moved to make them coincide (for example, knowing the thickness of the calibration element, the lower height can be made to coincide with the higher height, or vice versa, or the two heights are moved to make them occupy the same intermediate position).

[0180] Exemplarily, the detection of the elevation profile of the second part of the profile of the cross-section is carried out similarly to the detection of the elevation profile of the first part 11 described above.

[0181] Exemplarily, in the first and second embodiments, the first part 11 ( Figure 3 ) of the profile of the cross-section 200 and the second part (not shown) extend along the entire extension of the continuous elongate element in a direction perpendicular to the advancement direction 100 (i.e., the entire width of the elongate element is detected). Exemplarily, this means that the detection of the elevation profiles of the two parts of the profile may be sufficient to detect substantially the entire profile of the cross-section (with an approximately straight thickness).

[0182] Exemplarily (in both embodiments), the instruction and control unit 26 continuously calculates a value representative of the area extension of the cross-section 200 of the elongate element based on the elevation profile of the first part 11 (and possibly also the second part) of the profile of the cross-section.

[0183] In this regard ( Figure 3 ), in the first embodiment, continuously calculating a value representative of the area extension of the cross-section 200 exemplarily includes calculating the area targeted by the elevation profile of the first part 11 of the profile of the cross-section 200, i.e., the true cross-section enclosed by the dashed line (the segment depicted by the double-dashed line in Figure 3 ). For example, possible defects located on the lower surface, such as the depression C3, are not visible.

[0184] Exemplarily, the instruction and control unit 26, which is programmed to continuously instruct the propulsion system 1, continuously adjusts the feed speed based on the value representative of the area extension and the reference value of the feed flow rate of the continuous elongate element at the feed point A.

[0185] Exemplarily, the instruction and control unit 26, which is appropriately programmed, continuously calculates the theoretical value of the feed speed based on the ratio between the reference value of the feed flow rate and the value representative of the area extension of the cross-section.

[0186] Exemplarily, continuously adjusting the feed speed includes setting the feed speed equal to the theoretical value.

[0187] In the first and second embodiments, continuously adjusting the feed speed, for example, includes continuously instructing the propulsion device 2.

[0188] Exemplarily, when the cross-section 200 reaches the feed point A, the instruction and control unit 26 calculates the time delay of the cross-section 200 from the detection point R to the feed point A based on the feed speed and continuously adjusts the feed speed.

[0189] In another embodiment not shown, the detection point R can be arranged at the exit of the first track, i.e., near the feeding point A, and the continuous adjustment of the feeding speed is performed essentially simultaneously with the detection of the geometric information (i.e., ignoring the time delay of the cross section from the detection point to the feeding point).

[0190] The apparatus 99 of the present invention may also be used to deliver a certain amount (eg, mass) of material of an elongated element to a certain location (eg, for subsequent batch feeding).

[0191] Reference Figure 4 In the third embodiment of the device for metering according to the present invention, the first channel 110 exemplarily includes a buffer portion 112 arranged downstream of and continuous with the detection portion 111 , wherein an outlet of the buffer portion 112 coincides with an outlet of the first channel 110 .

[0192] Exemplarily, the propulsion system 1 further comprises a feeding device 999 (shown schematically), which is distinct and separate from the propulsion device 2 and is configured to grab the continuous elongated element and is suitable and arranged for delivering the continuous elongated element 900 directly to the feeding point A.

[0193] Exemplarily, a feeding device 999 is arranged at the exit of the buffer portion 112 , which is configured to pull the continuous elongated element 900 along the buffer portion 112 .

[0194] In the third embodiment, continuously adjusting the feeding speed exemplarily includes a continuous instruction feeding device 999 .

[0195] In the third embodiment, the tension of the continuous elongated element 900 along the buffer portion 112 is detected continuously without contact, and the tension detected along the buffer portion 112 is continuously compared with a corresponding reference tension by the command and control unit 26. To this end, the device 99 includes an additional tension sensor 82 arranged along the buffer portion and connected to the command and control unit 26.

[0196] In the third embodiment, the propulsion device 2 is commanded continuously based on a comparison between the tension detected along the buffer portion 112 and a corresponding reference tension by the command and control unit 26. In this way, the propulsion device 2 is commanded in large quantities to adjust the feeding speed.

[0197] In the third embodiment, the operation of the device 99 is illustratively similar to that described above.

[0198] It can be seen that the third embodiment of the device 99 can include (for example, upstream of the buffer portion 112) the first embodiment of the device described above (with a single detection device) and the second embodiment (with two detection devices) (illustratively, in Figure 4Shown is a display device 99 in combination with a single optical detection device).

[0199] By the number 81, a continuous processing machine for continuously processing a long-shaped element 900 (such as a mixer and / or an extruder, like those mentioned previously) is schematically represented and illustrated.

[0200] It can be seen that, exemplarily, the tension of the long-shaped element along the buffer portion 112 is lower than the tension of the portion of the long-shaped element along the detection portion 111, so as to cause a slight bending of the long-shaped element, the purpose of which is similar to that described with reference to the portion of the continuous long-shaped element upstream of the detection portion 111.

[0201] In an alternative embodiment, one or more pairs of rollers of the propulsion device, the braking device, and the moving device can be replaced by segments of a corresponding pair of conveyor belts, the segments of the pair of conveyor belts being arranged at opposite sides with respect to the continuous long-shaped element (in a manner similar to that of the rollers). These segments of the paired conveyor belts perform the same functions as the corresponding paired rollers of the corresponding devices. To this end, the segments of each pair of conveyor belts can maintain a thrust against each other to grip the long-shaped element, and they can be configured to be able to grip the continuous long-shaped element.

[0202] In one embodiment, one or more possible support rollers can be replaced by segments of a conveyor belt having a function similar to that of the support roller.

Claims

1. A method for continuously processing a continuous elongated element (900), said continuous elongated element comprising an elastic compound, the method comprising: - advancing the continuous elongated element (900) along a first path (110) in a feed direction (100); - continuously feeding the continuous elongated element (900) at a feed rate to a continuous processing machine (81) arranged at a feed point (A), said feed point being located at the outlet of the first path (110); - continuously processing the continuous elongated element (900) in the continuous processing machine (81) in order to obtain a product; - continuously discharging the product from the continuous processing machine (81); wherein the method further comprises: - continuously optically detecting geometric information relating to a cross-section (200) of the continuous elongated element (900) in a plane substantially perpendicular to the feed direction (100) at a detection point (R) along the first path (110); - continuously calculating a value representative of the area extension of the cross-section (200) based on said geometric information; and - controlling the feed rate of the continuous elongated element (900) to be continuously fed to the continuous processing machine (81) by continuously adjusting the feed rate based on said value representative of the area extension and a reference value of the feed rate of the continuous elongated element (900) at the feed point (A).

2. The method according to claim 1, comprising continuously calculating a theoretical value of the feed velocity based on a ratio between the reference value of the feed flow rate and the value representative of the areal extent of the cross-section (200), wherein, Continuously adjusting the feed rate includes setting the feed rate equal to the theoretical value.

3. The method according to claim 1, comprising: Calculating a time delay taken for the cross-section (200) to travel from the detection point (R) to the feed point (A), and wherein the feed rate is also continuously adjusted based on said time delay.

4. The method according to claim 3, comprising calculating the time delay based on the feed rate.

5. The method according to claim 1, wherein Detecting the geometric information includes detecting an elevation profile of at least a first portion (11) of the contour of the cross-section (200) relative to a reference height (500), wherein the first portion (11) of the contour of the cross-section (200) belongs to a first surface (10) of the continuous elongated element (900), wherein the first portion (11) of the contour is a continuous portion, and wherein the first portion (11) of the contour extends at least one third of the entire extent of the contour.

6. The method according to claim 5, wherein Only detecting the elevation profile of the first portion (11) of the contour of the cross-section, wherein continuously calculating the value representative of the area extension of the cross-section (200) includes calculating the area targeted by the elevation profile of the first portion (11) of the contour of the cross-section (200), wherein the continuous elongated element is advanced and brought into contact with a surface (501) of a transport element (5), wherein the height of the surface (501) of the transport element (5) corresponds to the reference height (500).

7. The method according to claim 5, wherein Detecting the geometric information includes detecting an elevation profile of a second part of the contour of the cross-section (200) relative to a corresponding reference height, wherein the second part of the contour of the cross-section (200) belongs to a second surface of the continuous elongated element (900), wherein the second surface is disposed on a substantially opposite side of the continuous elongated element (900) relative to the first surface (10), wherein the continuous elongated element (900) is suspended in air at the detection point (R), and wherein the same reference height for the elevation profiles of the first part (11) and the second part of the contour of the cross-section (200) is determined.

8. The method according to claim 6, wherein The first part (11) of the contour of the cross-section (200) extends substantially along the entire extension of the continuous elongated element, in a direction perpendicular to the advancement direction (100), and wherein detecting the elevation profile of the first part (11) of the contour of the cross-section (200) includes: - illuminating the first part (11) of the contour with a linear laser beam (400); - acquiring a matrix image of a matrix part of the surface of the continuous elongated element, the matrix part including the first part (11) of the contour, wherein the matrix image includes laser lines reflected by the first part (11) of the contour; - calculating the elevation profile by performing triangulation processing on the reflected laser lines.

9. The method according to claim 7, wherein The first part (11) and the second part of the contour of the cross-section (200) extend substantially along the entire extension of the continuous elongated element, in a direction perpendicular to the advancement direction (100), and wherein detecting the elevation profiles of the first part (11) and the second part of the contour of the cross-section (200) includes: - illuminating the first part (11) and the second part of the contour with a linear laser beam (400) respectively; - acquiring a matrix image of a matrix part of the surface of the continuous elongated element, the matrix part including the first part (11) and the second part of the contour, wherein the matrix image includes laser lines reflected by the first part (11) and the second part of the contour respectively; - calculating the elevation profile by performing triangulation processing on the reflected laser lines.

10. The method according to any one of claims 1 to 9, wherein The first path (110) includes a detection part (111) containing the detection point (R), wherein the continuous elongated element is tensioned along the detection part (111), wherein the first tension of the continuous elongated element along the detection part (111) is continuously detected, and the detected first tension is continuously compared with a corresponding first reference tension, and wherein, based on the comparison between the detected first tension and the corresponding first reference tension, the first tensioning system (16) is continuously commanded to tension the continuous elongated element along the detection part (111), and wherein the continuous elongated element is tensioned along the detection part (111) by pulling the continuous elongated element at one end of the detection part (111) while braking the continuous elongated element at the opposite end.

11. The method according to claim 10, wherein, Subject the continuous elongated element upstream of the detection section (111) to tension, continuously detect a second tension of the continuous elongated element upstream of the detection section (111), and compare the detected second tension with a corresponding second reference tension, and based on the comparison between the detected second tension and the corresponding second reference tension, continuously instruct a second tensioning system (21) to tension the continuous elongated element upstream of the detection section (111), wherein a first reference tension along the detection section (111) is greater than the second reference tension upstream of the detection section.

12. The method according to any one of claims 1 to 9, wherein, The first path (110) includes a detection section (111) containing a detection point (R), wherein the detection section (111) coincides with the first path (110), and continuously adjusting the feed speed includes continuously instructing a propulsion device (2) adapted to and / or arranged for directly feeding the continuous elongated element to the feed point (A), wherein the propulsion device (2) is arranged at the outlet of the detection section (111) and is configured to pull the continuous elongated element along the detection section (111).

13. The method according to any one of claims 1 to 9, wherein The first path (110) includes a detection section (111) containing a detection point (R), and a buffer section (112) arranged downstream of the detection section (111), wherein the outlet of the buffer section (112) coincides with the outlet of the first path (110), and continuously adjusting the feed speed includes continuously instructing a feeding device (999) arranged at the outlet of the buffer section (112) and configured to pull the continuous elongated element along the buffer section (112).

14. The method according to claim 13, wherein, Continuously detect the tension of the continuous elongated element along the buffer section (112), continuously compare the detected tension along the buffer section (112) with a corresponding third reference tension, and based on the comparison between the detected tension along the buffer section (112) and the corresponding third reference tension, continuously instruct a propulsion device (2) arranged at the outlet of the detection section (111) and configured to pull the continuous elongated element along the detection section (111), and wherein a first reference tension along the detection section (111) is greater than the third reference tension along the buffer section (112).

15. A device (99) for continuously processing a continuous elongated element (900), the continuous elongated element comprising an elastic compound, the device comprising: - A continuous processing machine (81) in which the continuous elongated element (900) is processed to obtain a product; - A propulsion system (1) for propelling the continuous elongated element (900) along a first path (110) in a propulsion direction (100) and for continuously feeding the continuous elongated element (900) at a feed speed to the continuous processing machine (81) arranged at a feed point (A), the feed point being located at the outlet of the first path (110); - An optical detection system (6) for continuously detecting, along the first path (110), geometric information related to a cross-section (200) of the continuous elongated element (900) in a plane substantially perpendicular to the advancement direction (100) at a detection point (R); - An instruction and control unit (26) connected to the propulsion system (1) and the optical detection system (6), wherein the instruction and control unit (26) is programmed to: - Continuously calculate a value representative of the area extension of the cross-section (200) based on the geometric information; - Continuously instruct the propulsion system (1) to control the feed rate of the continuous elongated element (900) to be continuously fed to the continuous processing machine (81) by continuously adjusting the feed speed based on the value representative of the area extension and a reference value of the feed rate of the continuous elongated element (900) at the feed point (A).

16. The device (99) according to claim 15, wherein, The optical detection system (6) includes a first optical detection device (7), the first optical detection device including a matrix camera (8) having an optical axis (300) and a linear laser source (9) capable of emitting a linear laser beam (400) having a propagation axis (401), and wherein the optical detection system (6) is configured and / or positioned to detect at least one elevation profile of a first portion (11) of the contour of the cross-section (200) relative to a reference height (500).

17. The apparatus (99) according to claim 16, wherein, The first portion (11) of the contour of the cross-section (200) belongs to a first surface (10) of the continuous elongated element (900), wherein the optical axis (300) or the propagation axis (401) is substantially perpendicular to the first surface (10) of the continuous elongated element (900), and wherein the optical axis (300) of the matrix camera (8) passes through a surface (501) of a transport element (5) of the continuous elongated element.

18. The apparatus (99) according to claim 16 or 17, wherein, The optical detection system (6) includes a second optical detection device (12), the second optical detection device including a respective matrix camera having a respective optical axis (301), and a respective linear laser source capable of emitting a respective linear laser beam having a respective propagation axis, wherein the optical detection system (6) is configured and / or positioned to detect an elevation profile of a second portion of the contour of the cross-section (200).

19. The apparatus (99) according to claim 18, wherein, The second optical detection device (12) is configured and / or positioned to detect the elevation profile of the second portion of the contour of the cross-section (200).

20. The apparatus (99) according to any one of claims 15 to 17, wherein The first path (110) includes a detection portion (111) that includes a detection point (R), wherein the propulsion system (1) includes a propulsion device (2) configured to grip the continuous elongated element, wherein the propulsion device (2) includes a motorized roller (3) that can be controlled by the command and control unit (26) and another roller (4) that is substantially parallel to the motorized roller (3) and maintains a thrust therewith, wherein the propulsion device (2) is placed at the outlet of the detection portion (111) and is configured to pull the continuous elongated element along the detection portion (111).

21. The apparatus (99) according to claim 20, wherein, The detection portion (111) coincides with the first path (110), and wherein the propulsion device (2) is adapted to and / or arranged to directly feed the continuous elongated element to the feed point (A).

22. The apparatus (99) according to claim 20, wherein, The first path (110) includes a buffer portion (112) placed downstream of the detection portion (111), wherein the outlet of the buffer portion (112) coincides with the outlet of the first path (110), wherein the propulsion system (1) further includes a feeding device (999) that is different from and separate from the propulsion device (2), the feeding device being configured to grip the continuous elongated element and adapted to and / or arranged to feed the continuous elongated element to the feed point (A), wherein the feeding device (999) is placed at the outlet of the buffer portion (112) and is configured to pull the continuous elongated element along the buffer portion (112), and wherein the feeding device (999) includes one or more features of the propulsion device (2).

23. The apparatus according to claim 22, wherein, The feeding device (999) is adapted to and / or arranged to directly feed the continuous elongated element to the feed point (A).

24. The device (99) according to any one of claims 15 to 17, comprising: A first tensioning system (16) for tensioning the continuous elongated element along a detection portion (111) that includes a detection point (R); And a second tensioning system (21) for tensioning the continuous elongated element upstream of the detection portion (111), wherein the first tensioning system (16) includes a braking device (18) for at least partially braking the advancement of the continuous elongated element along the detection portion (111), wherein each of the first tensioning system (16) and the second tensioning system (21) includes a respective tension sensor (17, 22) adapted to continuously detect the tension of the continuous elongated element, and wherein the command and control unit (26) is connected to the first tensioning system (16) and the second tensioning system (21).

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