Profile measuring device

Abstract

The invention relates to a measuring system (1) for measuring strand profiles (3) or extruded profiles, comprising a positioning device (4) for positioning a strand profile (3) and a measuring device (17) for measuring the strand profile (3). The positioning device (4) comprises a first base frame (7) aligned along the longitudinal extension (2) having a first bearing bracket (8) and a second bearing bracket (10) arranged opposite the first bearing bracket (8) in the direction of the longitudinal extension (2), a first rod-shaped reference object (12) extending along the longitudinal extension (2) between the first bearing bracket (8) and the second bearing bracket (10), and a holding unit (16) for positioning or holding the strand profile (3) in the measuring position (6). The measuring device (17) comprises a first guide rail (22) aligned along the longitudinal extension (2) and a first measuring unit (24) which can be moved along the first guide rail (22) by means of a first carriage (23), so that a surface of the strand profile (3) can be measured during the movement of the first measuring unit (24) along the first guide rail (22). Furthermore, the rod-shaped reference object (12) is clamped with a preloading force between the first bearing bracket (8) and the second bearing bracket (10) by means of a preloading device (15).

Description

[0001] PROFILE MEASURING DEVICE

[0002] The invention relates to a measuring system for the contactless and preferably discontinuous measurement of extruded profiles or extruded profiles or press-rolled profiles with a length of preferably up to 2.5 m. The measuring system has a longitudinal extension and comprises a positioning device for positioning or holding an extruded profile to be measured in a measuring position, wherein the extruded profile is aligned lengthwise along the longitudinal extension in its measuring position. The measuring system further comprises a measuring device with a guide rail aligned along the longitudinal extension and with a measuring device that can be moved along the guide rail by means of a carriage, so that a surface of the extruded profile can be incrementally and completely measured or tested as the measuring device moves along the guide rail and along the extruded profile to be measured.Using an appropriate evaluation device, a virtual test specimen of the extruded profile can be generated based on the measured surface.

[0003] Devices and methods for measuring extruded profiles are known from DE 102011000304 A1 and US 2018113079 A1. These devices and methods are preferably used for the continuous measurement of extruded profiles in order to monitor the required tolerances during the production of extruded profiles and to initiate readjustments in the event of deviations from the tolerances. Due to, among other things, electrification and lightweight construction requirements in the automotive industry, there is an increasing demand for extruded or rolled profiles with reduced dimensional tolerances. This leads to a need for improved accuracy in the measurement of extruded profiles, both to meet the required quality standards and to enable subsequent automated processing of the extruded profiles.The methods and devices known from the prior art for measuring extruded profiles, whether in their embodiments or not, do not meet the required measuring accuracies, while at the same time requiring reduced cycle times for measuring each extruded profile that has already been cut to length. Furthermore, using a continuous measuring method per se, the transverse sides of an individual extruded profile cannot be measured, or can only be measured with insufficient accuracy, in order to create a fully digitally depictable virtual test specimen, which virtual test specimen is or can be required for documentation in quality management. The object of the present invention was to overcome the disadvantages of the prior art and to provide a device by means of which the measuring accuracy when measuring an extruded profile orthe surface of an extruded profile is improved, while at the same time the cycle time for measuring an extruded profile is short.

[0004] This object is achieved by a device according to the claims.

[0005] The measuring system according to the invention has a longitudinal extension, is used for measuring or creating virtual test specimens of extruded profiles or press-rolled profiles of up to 2.5 m in length and comprises a positioning device for positioning an extruded profile that can be aligned in a measuring position along the longitudinal extension and a measuring device for measuring the extruded profile in the measuring position.

[0006] The positioning device comprises a first base frame aligned along the longitudinal extent with a first bearing bracket in a first end region and a second bearing bracket opposite the first bearing bracket in the direction of the longitudinal extent in a second end region, a first rod-shaped reference object extending along the longitudinal extent between the first bearing bracket and the second bearing bracket and a holding unit for positioning or holding the extruded profile in the measuring position, wherein the measuring position is defined in the near region of the first rod-shaped reference object.

[0007] The measuring device comprises a first guide rail aligned along the longitudinal extent and a first measuring device movable along the first guide rail by means of a first carriage, so that a surface of the extruded profile can be completely measured or tested or incrementally measured by contactless measurement of individual cross sections when the first measuring device is moved along the first guide rail.

[0008] Furthermore, the first rod-shaped reference object is clamped between the first bearing bracket and the second bearing bracket by means of a clamping device with a pre-tensioning force so that the first rod-shaped reference object has the intended straightness. The measuring device can therefore be used to determine a large number of measuring points on the surface of the extruded profile. At the same time, the first rod-shaped reference object is measured by means of the measuring device. Due to its pre-tensioning, the rod-shaped reference object is characterized by a particularly high degree of straightness, which remains constant, in particular with regard to temperature fluctuations. This is particularly important because the extruded profiles to be measured have a length of up to 2.5 m and thus the first rod-shaped reference object is in any case the same length or preferably longer than the extruded profile to be measured. This means that during incremental measuring orDuring non-contact scanning, for example, using a laser-based measuring device, the first rod-shaped reference object is also recorded for each measured cross-section or surface section, allowing each measured cross-section to be classified in a subsequent computer-assisted evaluation. It is precisely the prestressing of the first rod-shaped reference object and the resulting straightness within the smallest possible tolerance limits that ensure that an extruded profile can be measured with the highest possible accuracy.

[0009] The measuring system can be coupled to a corresponding evaluation device for computer-assisted evaluation of the measurement of extruded profiles. The evaluation device can, for example, be configured to evaluate the point cloud of measurement points, which may be obtained as a result of the measurement of an extruded profile, in such a way that deviations from surface areas of the measured extruded profile are identified. Consequently, based on the determined measurement points or measured values ​​of an extruded profile, it is also possible to create a virtual test specimen that can be assigned to the measured extruded profile with a unique identifier, so that the data determined by the measuring system can be uniquely assigned and documented for quality assurance purposes, even in a subsequent processing or usage cycle of the extruded profile.

[0010] In any case, the prestressing of the first rod-shaped reference object, in particular, enables improved accuracy in the discontinuous measurement of extruded profiles, with the addition of a corresponding computer-assisted evaluation of the measurement data. Furthermore, it may be expedient for the positioning device to further comprise a second rod-shaped reference object and a third rod-shaped reference object, wherein the second rod-shaped reference object and the third rod-shaped reference object are each clamped between the first bearing bracket and the second bearing bracket with a prestressing force, so that the intended straightness of the rod-shaped reference objects is ensured, and wherein the three rod-shaped reference objects are arranged in the vicinity of the measuring position.This ensures that the measuring device not only measures the surface of the extruded profile to be measured, but also the three reference objects, thus increasing measurement accuracy. Furthermore, the reference objects are designed redundantly, which improves the process reliability of the measurement when measuring a large number of extruded profiles. Since the measurement is preferably carried out using laser light-based measuring elements, several measuring elements can be arranged around the extruded profile on the measuring device, with each of the measuring devices being able to have two reference objects in its field of view, for example. The measurement data from the individual measuring elements can be consolidated with computer support through appropriate referencing according to the measured reference objects, which in turn increases measurement accuracy and subsequently also enables the use of comparatively simple measuring elements.

[0011] Furthermore, it can be provided that the three rod-shaped reference objects, in a projection onto a normal plane of the longitudinal extent, each have an angle to one another from a range comprising 40° to 190° relative to a central axis of the measuring position, wherein the extruded profile can be positioned in the measuring position within a cylindrical enveloping surface, which cylindrical enveloping surface is defined by the three rod-shaped reference objects or by their theoretical cross-sectional centers or, if applicable, by a respective point of contact of a tangent to a reference object, originating from a measuring beam of a measuring element, closest to the measuring position. This creates a defined measuring space within the cylindrical enveloping surface, wherein measuring elements of the measuring device can cover the cross-section of this measuring space, thus enabling complete measurement of the extruded profile in a simple manner.By arranging the rod-shaped reference objects at a specific angle to one another, it can also be ensured that at least two, and in particular three, rod-shaped reference objects can be detected by a measuring device, thus enabling computer-assisted comparison of the measurement data from individual measuring devices, which improves measurement accuracy and makes incorrect measurements detectable or avoidable. It can also be expedient to define the measuring position within a further cylindrical enveloping surface, wherein the further cylindrical enveloping surface is defined in such a way that none of the rod-shaped reference objects in the field of view of a respective measuring device is obscured by the extruded profile to be measured. This further cylindrical enveloping surface therefore has a smaller diameter than the enveloping surface.

[0012] Furthermore, it can be provided that the extruded profile can be picked up by a conveyor unit for extruded profiles by means of the holding unit, positioned within the cylindrical enclosure surface, and held in the measuring position. This ensures that the rod-shaped reference objects always surround the extruded profile to be measured, thus enabling precise measurement. During discontinuous measurement of a large number of extruded profiles, it can happen that individual extruded profiles have a different pick-up position when picked up by a conveyor unit for extruded profiles. Thus, the positioning of one extruded profile does not necessarily have to be the same as the positioning of another extruded profile.However, since an extruded profile can be positioned within the cylindrical envelope using the holding unit, and since the reference objects define the measuring space, this possible deviation in the respective recording position can be compensated for for each extruded profile using computer support with the aid of the measured reference objects. This, in turn, improves the measurement accuracy of the measuring system. Since lower accuracy is required for recording extruded profiles and the correct positioning of the extruded profiles in the measuring space or within the cylindrical envelope, this also enables a reduction in the cycle time for measuring an extruded profile, while still improving measurement accuracy.

[0013] Also advantageous is an embodiment according to which it can be provided that the prestressing force is at least 1 kN, in particular at least 2 kN per 1 m catch of the first rod-shaped reference object or of the respective rod-shaped reference object.

[0014] This ensures the straightness of the rod-shaped reference objects, wherein in particular any sagging of the rod-shaped reference objects due to their longitudinal extension can be minimized. According to a further development, it is possible for the measuring device to be mounted on a second base frame, wherein the first base frame and the second base frame are unconnected or each independently fixed in position to a foundation. Since, due to the length of the extruded profiles, at least parts of the measuring device for measuring the extruded profiles must or can be moved along the longitudinal extent of the positioning device or along the length of the extruded profile to be measured, if the positioning device and the measuring device were mounted on a single base frame, feedback of movements can occur on the extruded profile in the measuring position.This is avoided by using a separate base frame fixed to a foundation. This ensures that the extruded profile remains stationary in the measuring position, which in turn increases measurement accuracy and minimizes potential sources of error for subsequent measurement errors. This also further minimizes the cycle time for measuring individual extruded profiles.

[0015] Furthermore, it may be expedient if the measuring device extends at least over the entire longitudinal extent of the positioning device, so that a first end and a second end of the extruded profile in the measuring position can be detected by the measuring elements. This makes it possible to measure an extruded profile to be measured in its entirety. This is particularly advantageous because the complete measurement of an extruded profile and, if necessary, the creation of a virtual test specimen also requires the measurement of the transverse sides of the respective extruded profile. This can be particularly advantageous if the extruded profiles to be measured are subsequently subjected to further processing based on the measurement data or on the basis of the virtual test specimen created from this.

[0016] Furthermore, it can be provided that the first measuring device comprises a first support frame, on which first support frame at least two laser-based measuring elements are mounted, wherein the measuring elements are distributed on the first support frame such that, in a consolidated field of view of all measuring elements, the entire circumference of the extruded profile and at least circumferential sections of the first reference object(s) can be detected by means of the measuring elements during incremental measurement of the extruded profile. In particular, it can be advantageous if a respective measuring element has a field of view which comprises at least one circumferential section of the extruded profile and at least two, preferably three circumferential sections of two or respectively three reference objects.This ensures that the entire surface of the extruded profile to be measured can be measured, and that referencing to the reference objects or simultaneous measurement of the reference objects is ensured. This enables improved measurement accuracy of the surveying system.

[0017] Furthermore, it can be provided that the support frame is constructed in two parts with a first frame element and a second frame element, wherein at least one or preferably two measuring elements are arranged on the first frame element and on the second frame element, and wherein each frame element can be moved independently of the other frame element along the first guide rail by means of the first carriage and a further carriage. As a result, the frame elements can be moved sequentially, staggered or successively by means of the carriages along the longitudinal extent in order to measure an extruded profile. As a result, the forces occurring due to acceleration and deceleration of the moving parts of the measuring device can be minimized, which improves measuring accuracy and at the same time enables a reduced cycle time for measuring an extruded profile.

[0018] According to a particular embodiment, it is possible for the measuring device to comprise a second guide rail aligned along the longitudinal extent and a second measuring device that can be moved along the second guide rail by means of a second carriage, wherein the first measuring device comprises a first support frame and the second measuring device comprises a second support frame, wherein two laser light-based measuring elements are held on the first support frame and on the second support frame, so that in a consolidated field of view of all measuring elements, the entire circumference of the extruded profile and at least partial circumferential sections of the first reference object or the reference objects can be detected by means of the measuring elements during the incremental measurement of the extruded profile.This design allows each measuring element to have a smaller field of view sufficient for measuring the extruded profile, allowing the measuring elements to measure the extruded profile with improved accuracy and resulting in fewer measurement errors, particularly in the peripheral areas of the measuring elements' field of view. Furthermore, this design is also advantageous in that the first measuring device and the second measuring device can be accelerated and decelerated sequentially, which, as already explained above, in turn increases measurement accuracy.According to an advantageous development, it can be provided that the measuring elements are each designed as a laser-sensor combination, wherein the respective measuring elements are aligned relative to one another in such a way that a reflection shadow of the holding unit of a first field of view of a first measuring element can be detected by at least a second field of view of a second measuring element. Since the holding unit is designed to receive an extruded profile in order to position it in the measuring position, the extruded profile must necessarily bear against the holding unit. For this purpose, the holding unit naturally has an extension which, depending on the respective field of view of a measuring element, can cause a reflection shadow, which reflection shadow is an area that a sensor cannot detect.However, since several measuring elements are preferably formed and these are now aligned relative to one another with a respective offset field of view, the reflection shadow of a pair of measuring elements can be mutually compensated. This enables almost complete measurement of the surface of the extruded profile, except for the contact surfaces of the extruded profile with the holding unit. This is particularly advantageous for the creation of a virtual test specimen in order to be able to further process or edit an extruded profile based on its measurement. To completely avoid the reflection shadow of the holding unit, it may be expedient to provide a plurality, in particular at least eight, measuring elements.

[0019] The first rod-shaped reference object can have or the rod-shaped reference objects can have a circular cross-section. However, it can be particularly advantageous if the first rod-shaped reference object or the rod-shaped reference objects have or have a square or polygonal cross-section. This allows a simplified, computer-assisted determination of a center point of the cross-section of a rod-shaped reference object that is also being measured, or the partial areas of the reference objects resulting from the polygonal design of the reference objects can be measured with improved accuracy in order to subsequently be able to determine a central axis of a respective rod-shaped reference object with computer support and thus to be able to establish a reference to the measuring points on the surface of the extruded profile.

[0020] Furthermore, it can be provided that the rod-shaped reference object(s) is / are hollow. This minimizes the dead weight and thus any potential sagging of the rod-shaped reference objects, and thus allows the preload force required to achieve the required straightness of the rod-shaped reference objects to be kept within limits. According to the above explanations, this in turn improves the measurement accuracy with a correspondingly precise straightness of the rod-shaped reference objects.

[0021] Furthermore, it can be provided that the first rod-shaped reference object(s) has / have a matte or frosted surface. Due to the preload force to be absorbed, the reference objects are preferably made of steel, stainless steel, or a metal, whereby the frosted surface can preferably be formed by glass bead blasting or a process with an equivalent effect on the surface. Advantageously, the frosted surface improves measurement accuracy when using laser-based measuring elements.

[0022] Another advantageous embodiment provides for the carriage movable along the guide rail to be mounted on a guide rail spaced transversely from the guide rail and extending along the longitudinal extent. This effectively and easily prevents the measuring device from tipping during acceleration and deceleration. For improved measurement accuracy, such tipping transversely to the longitudinal extent must be avoided in any case, which is why it may also be useful for the measuring device or a carriage movable along a guide rail to have a transverse extension transverse to the longitudinal extent of at least 30 cm, in particular of at least 50 cm.

[0023] These possible features effectively prevent the measuring device from tilting relative to the reference objects or the extruded profile in the measuring position, which improves the measuring accuracy and also enables reduced cycle times, since the respective measuring device or the respective carriage can be moved in a positionally stable manner along the longitudinal extent.

[0024] For a better understanding of the invention, it is explained in more detail using the following figures.

[0025] They show in a highly simplified, schematic representation:

[0026] Fig. 1 shows a first possible embodiment of the surveying system; Fig. 2 shows a detailed view of the first possible embodiment of the surveying system;

[0027] Fig. 3 shows a partial section of the first possible design of the surveying system in sectional view.

[0028] By way of introduction, it should be noted that in the variously described embodiments, identical parts are provided with identical reference symbols or component designations. The disclosures contained throughout the description can be applied analogously to identical parts with identical reference symbols or component designations. Furthermore, the positional information chosen in the description, such as top, bottom, side, etc., refers to the directly described and illustrated figure, and these positional information must be applied analogously to the new position in the event of a change in position.

[0029] Figs. 1 to 3 show a first possible embodiment of a surveying system 1, or detailed views or schematically illustrated partial sections in a sectional view in a plane normal to a longitudinal extension 2 thereof. Due to the complexity of the first possible embodiment of the surveying system 1, individual components may be partially concealed by other components and thus not clearly visible, so that Figs. 1 to 3 should be viewed as an overall view, with the same reference numerals or component designations being used for identical parts.

[0030] Fig. 1 shows a first possible embodiment of the surveying system 1. Fig. 2 shows a detailed view of the first possible embodiment of the surveying system 1. Fig. 3 shows a schematically illustrated partial section of the surveying system 1 in a sectional view in a plane normal to the longitudinal extension 2.

[0031] The measuring system 1 is used to measure or create a virtual test specimen of extruded profiles 3 with a length of up to 2.5 m and can have the longitudinal extension 2. The measuring system 1 can comprise a positioning device 4 for picking up, positioning and holding an extruded profile 3. An extruded profile 3 can be positioned in a measuring position 6 in order to measure the extruded profile 3. The measuring system 1 can comprise a measuring device 17 for measuring or testing the extruded profile 3 positioned in the measuring position 6. The positioning device 4 can comprise a first base frame 7 aligned along the longitudinal extension 2 with a first bearing bracket 8 in a first end region 9 and a second bearing bracket 10 in a second end region 11 opposite the first bearing bracket 8 in the direction of the longitudinal extension 2.Furthermore, the positioning device 4 can comprise a first rod-shaped reference object 12 extending along the longitudinal extent 2 between the first bearing bracket 8 and the second bearing bracket 10, wherein the first rod-shaped reference object 12 is clamped between the first bearing bracket 8 and the second bearing bracket 10 by means of a clamping device 15 with a pretensioning force, so that a proper straightness of the first rod-shaped reference object 12 is ensured.

[0032] As shown in the first possible embodiment of the measuring system 1, it can also be provided that the positioning device 4 further comprises a second rod-shaped reference object 13 and a third rod-shaped reference object 14, wherein the second rod-shaped reference object 13 and the third rod-shaped reference object 14 are each clamped between the first bearing bracket 8 and the second bearing bracket 10 by means of a clamping device 15 with a pretensioning force, so that a proper straightness of the rod-shaped reference objects 13, 14 is ensured.It can be provided that the three rod-shaped reference objects 12, 13, 14, in a projection onto a normal plane 18 of the longitudinal extension 2, each have an angle 19 from a range comprising 40° to 190° relative to a central axis of the measuring position 6, wherein the extruded profile 3 can be positioned in the measuring position 6 within a cylindrical enveloping surface 20, which cylindrical enveloping surface 20 is defined by the three rod-shaped reference objects 12, 13, 14 or by their theoretical cross-sectional centers and thus also by the central axis 41 of the measuring position 6.Alternatively, it can also be provided that the extruded profile 3 can be positioned in the measuring position 6 within a further cylindrical enveloping surface 42, which further cylindrical enveloping surface 42 is defined such that none of the rod-shaped reference objects 12, 13, 14 in the field of view of a respective measuring element 21 is obscured by the extruded profile 3 to be measured. This further cylindrical enveloping surface 42 therefore has a smaller diameter than the enveloping surface 20.

[0033] In order to ensure the required or intended straightness of the rod-shaped reference objects 12, 13, 14, it can be provided that the prestressing force is at least 1 kN, in particular at least 2 kN per 1 m of length of the first rod-shaped reference object 12 or of the respective rod-shaped reference object 12, 13, 14. The rod-shaped reference objects 12, 13, 14 can optionally have a circular, a rectangular or square, or even a polygonal cross-section. Furthermore, it can also be provided that the rod-shaped reference objects 12, 13, 14 are hollow in order to reduce their dead weight and thus minimize sagging and, subsequently, to keep the prestressing force within limits. For the measurement of the extruded profile 3, for which laser light-based measuring elements 21 can be used, it can also be advantageous if the rod-shaped reference objects 12, 13, 14 have a matt orhave a matt surface, in particular a surface matt or processed by glass bead blasting.

[0034] The positioning device 4 can further comprise a holding unit 16 for receiving, positioning, or holding the extruded profile 3 in the measuring position 6, wherein the measuring position 6 can be defined in the vicinity of the first rod-shaped reference object 12. For example, an extruded profile 3 can be picked up by a conveyor unit 5 by means of the holding unit 16 and positioned in the measuring position 6 and held there in order to measure the extruded profile 3 by means of the measuring device 17. An extruded profile 3 can thus be picked up by the conveyor unit 5 for extruded profiles 3 by means of the holding unit 16 and positioned within the cylindrical enveloping surface 20.

[0035] The measuring device 17 can comprise a first guide rail 22 aligned along the longitudinal extent 2 and a first measuring device 24 movable along the first guide rail 22 by means of a first carriage 23, such that a surface of the extruded profile 3 can be incrementally and completely measured or tested as the first measuring device 24 is moved along the first guide rail 22. To measure the extruded profile 3, the first measuring device 24 must be moved along the first guide rail 22 by means of the first carriage 23 in order to be able to incrementally measure individual cross-sections of the extruded profile 3 and thus the entire surface of the extruded profile 3. For this purpose, the first carriage 23 with the first measuring device 24 must be accelerated and decelerated again along the first guide rail 22.In order to prevent the acceleration and braking forces from being transferred to the positioning device 4 and thus negatively influencing the measuring accuracy, it can be provided that the measuring device 17 is mounted on a second base frame 25, wherein the first base frame 7 and the second base frame 25 are unconnected or each independently fixed in position to a foundation 26. In order to be able to measure the entire length of the extruded profile 3 to be measured and located in the measuring position 6, and furthermore also the transverse sides of the extruded profile 3, it can be provided that the measuring device 17 extends at least over the entire longitudinal extent 2 of the positioning device 4, so that a first end 27 and a second end 28 of the extruded profile 3 located in the measuring position 6 can be detected by the measuring elements 21. Alternatively, it can also be provided thatin particular, a further measuring element 21 is provided on each of the first bearing bracket 8 and the second bearing bracket 10 (not shown) in order to be able to measure the first end 27 and the second end 28 of the extruded profile 3.

[0036] The first measuring device 24 can further comprise a first support frame 29, on which at least two laser-based measuring elements 21 are mounted, wherein the measuring elements 21 are distributed on the first support frame 29 such that, in a consolidated field of view 40 of all measuring elements 21, the entire circumference 30 of the extruded profile 3 and at least circumferential sections 31 of the first reference object 12 or of the reference objects 12, 13, 14 can be detected by means of the measuring elements 21 during the incremental measurement of the extruded profile 3. It is not necessary for the consolidated field of view 40 to be designed such that the individual fields of view of the measuring elements 21 overlap at all times during the measurement of the extruded profile 3.Rather, the individual fields of view of the individual measuring elements 21 can be consolidated or combined virtually or by means of evaluation software using the reference objects 12, 13, 14 located at least partially within the respective field of view of a measuring element 21, through a corresponding evaluation of the measured values ​​and a referencing of the fields of view via the co-measured reference objects 12, 13, 14. Thus, an extruded profile 3 can be measured in its entirety or represented or imaged as a virtual test object.

[0037] In an alternative second and not shown embodiment of the measuring system 1, it can be provided that the first support frame 29 is formed in two parts with a first frame element and a second frame element, wherein at least one or preferably two measuring elements 21 are arranged on the first frame element and on the second frame element, and wherein each frame element can be moved independently of the other frame element along the first guide rail 22 by means of the first carriage 23 and by means of a further carriage.In the first possible embodiment of the measuring system 1, it can further be provided that the measuring device 17 comprises a second guide rail 32 aligned along the longitudinal extent 2 and a second measuring device 34 which can be moved along the second guide rail 32 by means of a second carriage 33, wherein the first measuring device 24 comprises the first support frame 29 and the second measuring device 34 comprises a second support frame 35, wherein two laser light-based measuring elements 21 are held on the first support frame 29 and on the second support frame 35, so that in a consolidated field of view 40 of all measuring elements 21, the entire circumference 30 of the extruded profile 3 and at least partial circumferential sections 31 of the first reference object 12 or the reference objects 12, 13, 14 can be detected by means of the measuring elements 21 during the incremental measurement of the extruded profile 3.

[0038] The measuring elements 21 can each be designed as a laser-sensor combination, wherein the respective measuring elements 21 can be aligned relative to one another such that a reflection shadow of the holding unit 16 of a first viewing area 36 of a first measuring element 37 can be detected by at least a second viewing area 38 of a second measuring element 39. Thus, the extruded profile 3 or its surface can be measured almost completely, except for the contact surfaces on the holding unit 16.

[0039] Finally, it can also be provided that in a further embodiment of the measuring system 1, which is not shown, it is provided that the carriage 23 or 33 which can be moved along the guide rail 22 or 32 is attached to a guide rail 22 or 32.

[0040] 32 is mounted on a guide rail spaced transversely to the longitudinal extension 2 and extending along the longitudinal extension 2. This prevents an undesired inclined position of the measuring elements 21 relative to the positioning device 4 during acceleration and deceleration of the measuring device 24 or 34.

[0041] For the sake of clarity, it should be noted that some elements have been shown not to scale and / or enlarged and / or reduced in size to improve understanding of the structure.

[0042] Measuring system 32 Second guide rail Longitudinal extension 33 Second carriage Extruded profile 34 Second measuring device Positioning device 35 Second support frame Conveyor unit 36 ​​First viewing area Measuring position 37 First measuring element First base frame 38 Second viewing area First bearing bracket 39 Second measuring element First end area 40 Consolidated viewing area Second bearing bracket 41 Central axis Second end area 42 Further cylindrical envelope First reference object surface Second reference object Third reference object Clamping device Holding unit Measuring device Normal plane Angle

[0043] Envelope surface measuring element

[0044] First guide rail First carriage

[0045] First measuring device Second base frame Foundation First end Second end

[0046] First support frame circumference

[0047] Scope of steep sections

Claims

Patent claims 1. A measuring system (1) with a longitudinal extension (2) for measuring extruded profiles (3), comprising a positioning device (4) for positioning an extruded profile (3) that can be aligned in a measuring position (6) along the longitudinal extension (2) and a measuring device (17) for measuring the extruded profile (3) in the measuring position (6), - wherein the positioning device (4) comprises a first base frame (7) aligned along the longitudinal extent (2) with a first bearing bracket (8) in a first end region (9) and a second bearing bracket (10) opposite the first bearing bracket (8) in the direction of the longitudinal extent (2) in a second end region (11), a first rod-shaped reference object (12) extending along the longitudinal extent (2) between the first bearing bracket (8) and the second bearing bracket (10), and a holding unit (16) for positioning or holding the extruded profile (3) in the measuring position (6), and - wherein the measuring device (17) comprises a first guide rail (22) aligned along the longitudinal extent (2) and a first measuring device (24) which can be moved along the first guide rail (22) by means of a first carriage (23), so that a surface of the extruded profile (3) can be measured or tested incrementally and completely when the first measuring device (24) is moved along the first guide rail (22), characterized in that the first rod-shaped reference object (12) is clamped between the first bearing bracket (8) and the second bearing bracket (10) by means of a clamping device (15) with a pretensioning force, so that a correct straightness of the first rod-shaped reference object (12) is ensured.

2. Surveying system (1) according to claim 1, characterized in that the positioning device (4) further comprises a second rod-shaped reference object (13) and a third rod-shaped reference object (14), wherein the second rod-shaped reference object (13) and the third rod-shaped reference object (14) are each clamped between the first bearing bracket (8) and the second bearing bracket (10) by means of a clamping device (15) with a pretensioning force, so that a correct straightness of the rod-shaped reference objects (13, 14) is ensured.

3. Surveying system (1) according to claim 2, characterized in that the three rod-shaped reference objects (12, 13, 14) in a projection onto a normal plane (18) of the longitudinal extension (2) each have an angle (19) from a range comprising 40° to 190° relative to a central axis (41) of the measuring position (6), wherein the extruded profile (3) in the measuring position (6) can be positioned within a cylindrical enveloping surface (20), which cylindrical enveloping surface (20) is defined by the three rod-shaped reference objects (12, 13, 14).

4. Surveying system (1) according to claim 3, characterized in that the extruded profile (3) can be picked up by means of the holding unit (16) from a conveyor unit (5) for extruded profiles (3) and can be positioned within the cylindrical enveloping surface (20) and held in the measuring position (6).

5. Surveying system (1) according to one of the preceding claims, characterized in that the prestressing force is at least 1 kN, in particular at least 2 kN per 1 m of length of the first rod-shaped reference object (12) or of the respective rod-shaped reference object (12, 13, 14).

6. Surveying system (1) according to one of the preceding claims, characterized in that the measuring device (17) is mounted on a second base frame (25), wherein the first base frame (7) and the second base frame (25) are unconnected or each independently fixed in position on a foundation (26).

7. Surveying system (1) according to one of the preceding claims, characterized in that the measuring device (17) extends at least over the entire longitudinal extent (2) of the positioning device (4), so that a first end (27) and a second end (28) of the extruded profile (3) located in the measuring position (6) can be detected by the measuring elements (21).

8. Surveying system (1) according to one of the preceding claims, characterized in that the first measuring device (24) comprises a first support frame (29), on which first support frame (29) at least two laser light-based measuring elements (21) are held, wherein the measuring elements (21) are arranged distributed on the first support frame (29) in such a way that in a consolidated field of view (40) of all measuring elements (21) during incremental measurement of the extruded profile (3) the entire circumference (30) of the extruded profile (3) and at least partial circumferential sections (31) of the first reference object (12) or the reference objects (12, 13, 14) can be detected by means of the measuring elements (21).

9. Surveying system (1) according to claim 8, characterized in that the first support frame (29) is designed in two parts with a first frame element and a second frame element, wherein at least one or preferably two measuring elements (21) are arranged on the first frame element and on the second frame element, and wherein each frame element can be moved independently of the other frame element along the first guide rail (22) by means of the first carriage (23) and a further carriage.

10. Surveying system (1) according to one of the preceding claims, characterized in that the measuring device (17) comprises a second guide rail (32) aligned along the longitudinal extent (2) and a second measuring device (34) movable along the second guide rail (32) by means of a second carriage (33), wherein the first measuring device (24) comprises a first support frame (29) and the second measuring device (34) comprises a second support frame (35), wherein two laser light-based measuring elements (21) are held on the first support frame (29) and on the second support frame (35), so that in a consolidated field of view (40) of all measuring elements (21) during the incremental measurement of the extruded profile (3), the entire circumference (30) of the extruded profile (3) and at least circumferential sections (31) of the first reference object (12) or the reference objects (12, 13, 14) can be measured by means of the measuring elements (21) can be detected.

11. Surveying system (1) according to one of claims 8 to 10, characterized in that the measuring elements (21) are each designed as a laser-sensor combination, wherein the respective measuring elements (21) are aligned relative to one another in such a way that a reflection shadow of the holding unit (16) of a first field of view (36) of a first measuring element (37) can be detected at least by a second field of view (38) of a second measuring element (39).

12. Surveying system (1) according to one of the preceding claims, characterized in that the first rod-shaped reference object (12) or the rod-shaped reference objects (12, 13, 14) have or have a square or polygonal cross-section.

13. Surveying system (1) according to one of the preceding claims, characterized in that the first rod-shaped reference object (12) or the rod-shaped reference objects (12, 13, 14) is or are hollow.

14. Surveying system (1) according to one of the preceding claims, characterized in that the first rod-shaped reference object (12) or the rod-shaped reference objects (12, 13, 14) have or have a matt or a matt surface.

15. Surveying system (1) according to one of the preceding claims, characterized in that the carriage (23 or 33) which can be moved along the guide rail (22 or 32) is mounted on a guide rail which is spaced apart from the guide rail (22 or 32) transversely to the longitudinal extent (2) and which runs along the longitudinal extent (2).

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