SE468107B - PROCEDURE SHOULD REVISE AATMINSTONE BY AN OPTELECTRIC CAMERA WHICH IS LISTED FROM AATMINSTONE TWO DIFFERENT HALLS AND WHICH THE PICTURE SHOWS AATMINSTONE CONTAINS TWO LENGTH BOARDS, ACCORDINGLY - Google Patents

Description

468 1Û7 2 light-sensitive, electrical output signals generating sensor elements, e.g. photodiodes, arranged. Examples of such cameras are line cameras (with a linear set of sensors), or camcorders (with a rectangular set of sensors).

In the sawmill industry, it is known to illuminate boards, which has at least one vane, from a first direction and in this case in at least one camera determines the course of the longitudinal edges of the board (incl. the longitudinal edges, which separate the vane edges from the flat side) on on the basis of the differences in the intensity of the reflected light, due to the darker color of the vanquarters and / or different ning.

According to SE-A-7306428-9 (= US-A-3,890,509) is transported a board on a cross conveyor and illuminated (seen in the feed direction) obliquely from above and behind, whereby in a first zone is registered in a first detection device in the form of a row above the board photodetectors differences in the reflected the intensity of the light. In one next to the first measurement zone located others mat zone, the board (seen in the feed direction) is illuminated obliquely from the front, and in a second shape detection device photodetectors arranged by a row above the board are recorded differences in the intensity of the reflected light. In an electro- technical evaluation unit, into which the output of the photodetectors signals, determined in boards with full vanguard position for the four longitudinal edges of the board. Exact measurement of boards with partial defects, as well as detection of surface defects, are with this device However, this is not possible.

SE-B-8105050-1 (Publ. No. 449 136) describes a procedure and a width measuring device in which a narrow radiation bundle by means of a rotating mirror element sweeps across along a longitudinally displaced board, whereby it reflected the light is absorbed by two detectors arranged on either side of the board in the form of photodiodes.

Measurement of boards fed on a cross conveyor is not possible, and too steep defects are not detected, if the device does not have to be supplemented with a concave mirror that is large as the width of the board.

According to SE-B-7807569-3, boards which on a transverse conveyor is transported through a measuring zone, alternating with low and 468 107 3 with high light intensity, and in the latter case also for alternately from the right and from the left. In an e- electronic evaluation unit is then determined for each one diode element depicted surface element of the board the difference between there amount of light, received at low light, and that received in bright lighting. This difference is compared to a predetermined one value, and the results of the comparison are further processed in the so that the conclusion can be drawn about the respective surface elements included or not included in a surface defect on the board, or if it constitutes or does not form the boundary between a cleaned saw surface and a vane edge.

If both flat sides of the board are to be inspected, then arrange accordingly the first measuring device a second measuring device in the up and down inverted position, or the board itself is turned upside down and fed to one other measuring device installed in the same position as the first the measuring device.

The frequency of the light intensity changes must be high (in the order of a pair or more kHz), subsequently which against a pixel should always be on the moved board answer one and the same only about lxl mm large surface element, whose light reflection is measured in the period of low-intensity lighting and in it the next period of high-intensity lighting.

In the sawmill practice, the aim is for the boards to transport between the individual workstations is always in advance at the highest possible speed (on the order of unqffar lm / sec for transverse transport, or at least Sm / sec for longitudinal; rt, permitted by the preceding and / or subsequent kf n-t- operation. For economic reasons, it is excluded a "r carrier only for the sake of the measurement would give safer, than what the production itself requires.

However, it is difficult to achieve I high frequency density changes, especially when ga..ø ~ relatively large differences (eg in the order of 50 c; required between the high-intensity and the low-intensity 2 - There are no lighting fixtures on the market for; -.- sees consent such application, which in the case in question;: ~ the site has a spectral composition which is also suitable for fc:: «- detection of defects on wooden surfaces, which at the same time allow density variations at a sufficiently fast rate. 468 1Û7 4 The present invention has for its object to provide a method and an arrangement of the initial slave goat for inspection of a measuring object both dimensions and shape and surface condition (ie any surface defects), however, using installation of steadily illuminated lighting devices, and also used transverse displacement of the measuring object.

The invention is based on the idea of varying lighting ("blink") from two opposite directions (ie basically one temporal) division), can be replaced by constant lighting from at least two different directions with undifferentiated light, ie with light that does not differs in one of its parameters (such as mainly wavelength, or polarization state), when the capture area is divided into two or three adjacent measurement zones.

The invention is characterized by the features which appear from related claims, and it will now be explained in more detail by means of exemplary embodiments according to the accompanying drawings, in which i Fig. 1 shows the geometry of a typical measuring object, Fig. 2 is a perspective view of a device according to the invention in an embodiment with transverse transport of the measuring object and with two measuring zones, Fig. 3 is one side view of the device according to Fig. 2, in Fig. 4 is shown on a larger scale a part of Fig. 3, Fig. 4a shows an alternative embodiment with a single lighting device for two measuring stations, Fig. 5 shows one alternatively design with an upside-down second measuring station, i Fig. 6 shows a first embodiment with three measuring zones, Fig. 7 shows a second embodiment with three measuring zones, Fig. 7a shows a modified row detail in the device according to Fig. 7, in Fig. 8 a third is shown design with three measuring zones, Fig. 9 shows schematic placement of the measuring stations in facilities that allow long-distance transport of the measuring object, and in Figs. 10 and 11 schematically two measuring zones are shown in the measuring station AL in Fig. 9 for measurement both with transverse and with longitudinal feed.

Ingredients with the same function are denoted in all drawings figures with identical or analogous reference numerals.

According to Fig. 1, a board B has a narrower upper flat side a with width a ', a wider lower flat side b with width b', two partial cleared side edges and the flat and rear edge flat edges dor c, d with the width c ', d', and two partial vanes e, f, with depth el, fl, and with width e2, f2. The board has a thickness 468 107 5 t and has a curvature with an arrow height P relative to a chord k.

The flat side b and / or the cord plane k constitute a straightening surface according to der the above definition.

In the measurement and inspection, all the dimensions, as well as the quality of pages a and b (occurrence or lack of surface defects) is determined.

According to Figs. 2-4, a device according to the invention a frame structure 10 which includes a pair of front panels 10a and a pair of rear pillars 10b. Through the frame construction 10 lower part passes a cross conveyor 11 consisting of one several with mutual distances running parallel to each other driven belts or chains 11a.

In the present description and in the appended claims the terms "front", "front", or "rear", "after" are related etc. always to the feed direction F1 of the cross conveyor 11, and the terms "from above", "upwards" or "from below", "downwards" to conveyor ll feed plane T (Fig. 3).

On the input side of the device (left in the drawing) connects to the cross conveyor 11 an input conveyor 20, which is also a cross conveyor and which consists of one several running parallel to each other, and with carriers 20a 'provided bands or chains 20a. In an analogous way connects to the cross conveyor ll on the discharge side (to the right of the en) an output conveyor 21, which is also a transverse conveyor porter consisting of a plurality of parallel the straps or chains 21a provided with carriers 21a '. Tvar- Carriers of this kind are well known.

Above the cross conveyor 11 is on the frame structure 10 in the area of the front pillars 10a and in front of the rear pillars 10b four cooperating camera devices Kll, K12 and K2l, X2? clean- terade.

In the present description and in the appended claims is meant by the term "camera device" a camera, or several red mutually parallel optical axes in a row next to each other arranged cameras, while by the term "camera set-up" means two on either side of the measuring object arranged diametrically opposite each other camera devices with parallel (or coincident) op- optical axes, whereby when the term "optical axis" is used in conjunction 468 107 6 with a camera device or set, it means device all mutually parallel or convergent or set falling optical axes.

The term "opposite direction" means the room relation of the type --left (from) / right (from) - or vice versa, while with the term "diametrically opposite" or "diametrically opposite" means spatial the type --up up left / down right - or - up from left / bottom right - or vice versa.

The term "enclosing an angle" means, in general, generally that two lines are not parallel to each other, but closes an angle which, unless otherwise stated, is between 5 ° and 850.

In the example shown in Figs. 2-4, the camera device intended for receiving approximately 6m long boards, and each device consists of three cameras such as Klla, Kllb, Kllc. Also one smaller number of cameras could be used if they were mounted high re up above the feed plane T, but the ceiling height in the premises, there such facilities are installed, here constitutes a limitation.

The cameras in the devices K11 and K12 are directed right downwards, ie so that their optical axes Klla ', Kl2a' run substantially perpendicular to the feed direction F and the feed plane cameras T, while the cameras in devices K21 and K22 are directed obliquely downwards in such a way that their optical axes K2la ', K22a 'hits the feed plane T (seen in the feed direction) F) from the front at an angle of incidence a of approximately 45 °, and cut them the optical axes Klla ', Kl2a' in the area at, or slightly above, the transverse conveyor ll. Also above the cross conveyor 11, but considerably less distance than the camera devices K11, K12, K21, K22, is on support arms 15, which extend on either side of the front ones pillars l0a, two elongated, steadily illuminating lighting devices arrangements (eg fluorescent lamps or fluorescent lamps) l2a and l2b with a mutual distance D (Fig. 4), and next to the lighting device l2a a third elongated, steadily lit lighting fixture scheme l2c.

Between the lighting devices 12a and 12c is a rallellt with these continuous series of non-contact profile meters 14 (eg at least 3 pcs) with high measuring frequency arranged, for example by 468 107 7 the type marketed under the name "Selcom". Opposite pro the film meters 14 are identical profile meters 14 'arranged under the feed plane T, so that cooperating profile meter pairs 14/14 'are obtained les.

The profile meters 14, 14 'have a dual purpose: partly they shall indicate that a piece of wood (such as a board B 'in Fig. 3) has entered the measuring range covered by the cameras, and partly they shall determine the shape and profile of the piece of wood (eg if any cupiness) by continuously measuring the distance to the facing the respective meter.

The purpose of the design is to determine the possible tual edge curvature and / or flat bending, while the profile determination reveals any dents and skew, and provides information on edges and cracks.

The profile mats 14, 14 'can be arranged, for example, in 1 intervals Xi in the direction perpendicular to the plane of the drawing for Fig. 3), whereby it is achieved that a possible oblique placement of the wire The bit on the conveyor 11 can be determined independently of the rorna.

The purpose of the lighting device l2c is to act in determining the depth el (Fig. 1) of a feed direction f front upper upper edge e 'by illuminating (light beam L "') the upper flat side a of the board and the vankant e 'in question, not clean the flat side c of the leading edge, so that it appears dark for bn -: - rorna K21. Thereby the width c 'of the leading edge 1Ja!' Is obtained .: J c, from which, with the knowledge of the thickness of the board t, can aa - a "~ - pet el is determined.

In the area of the front pillars 10a, ie irt, .. ° - conveyor end 11 of the conveyor 11, thus 1- measuring station A comprising a first measuring zone A1 and, y '« distance d in the feed direction F thereafter, an a '~ A2.

By "measuring zone" is meant herein described:. close claims of at least one lighting fr illuminate the field of view of at least one camera device.

Mätzonen Al, which is actually divided into two parts, consists of au: - ' area on the conveyor 11 or the transport plane T, which meet: av the optical axes Klla '(illumination of the illumination device: Ia 468 107 8 beam L ') and K2la' (illumination of the lighting device 12c beam L "'), while the measuring zone A2 is constituted by that area around the intersection of the optical axes Kl2a 'and K22a', which illuminated by the beam L "of the illuminator 12b.

The distance d between the measurement zones is chosen so large that the shooting with lighting from the left (the lighting devices 12a, 13a) are not confused with the shooting with the lighting from the right (lighting devices 12b, 13b), and can for example lie in the order of 50-100cm.

As lighting devices, for example, sodium lamellae can be used. pores that are normally operated with alternating voltage from the mains, which carries that the lamp is dark 50 times per second. Because the cameras works with a high frame rate, can with each board multiple images utebli. To eliminate this inconvenience, lighting devices the ions are advantageously fed with direct current, the polarity of which, however should be periodically reversed to avoid skewed exposure of the which would lead to a reduction in brightness.

The pole reversal can be done in the intervals then in the measuring station one board is replaced by another, or with such frequency, that variations in the luminous flux that occur in connection with evenly distributed over all images. In the latter case fed the lamps preferably with a square scale instead of with a mesh sine wave. Alternatively, the pole weaving can be controlled by a monitoring device which detects that the brightness is decreasing below a predetermined value.

Above the cross conveyor 11 is further on the frame construction in the area at the rear pillars 10b two camera devices ar K3l, K32 with optical axes K31a ', K32a', and behind the columns JC: two camera devices K4l, K42 with optical axes K41a 'and Danger' arranged (at equal distances behind the pillars 10b as the cameras F23.

K22 is located behind the pillars 10a).

Each camera device consists of the exer; lct again by three cameras such as K41a, K41b, K41c. Also as fcru: the cameras in the devices K31 and K32 are directed vertically downwards, that is, so that their optical axes K3la ', K32a' extend substantially perpendicular to the feed plane T, while the cameras in the device K41 and K42 are directed (seen in the feed direction F) from from obliquely downwards so that their optical axes K41a 'and K42a' 468 107 9 intersects the optical axes K31a 'and K32a' in the cross conveyor area.

In the example shown, they enclose the optical axis K4la 'and K42a' with feed direction F and feed the plane T an angle DU, which is equal to the angle 0 (, ie circumferences 45 °.

Above the cross conveyor 11 is further on considerably ind distance than the camera devices K3l, K32, K4l, K42 on a carrier 16, extending on either side of the rear pillars 10b, long stretched, steadily shining lighting devices (eg light red or fluorescent lamp rows 13a and 13b arranged on a mutual of stand, which is suitably equal to the distance D, and, next to illuminated l3a, a third elongate, stable light source lighting device 13c with the same function as lighting device 12c.

In the area of the rear pillars 10b, adjacent to the transverse the discharge end of the porter 11, a second measuring station AA comprising a first measuring zone AA1, and at a distance, which is suitably equal to the distance d, in the feed direction I then, a second measurement zone AA2.

For the measuring station AA and the measuring zones AA1, AA2 and for the lighting devices l3a, 13b, l3c, and for the camera devices K31, K32, K4l and K42 apply the same, as has been said above measuring station A and corresponding lighting devices and vessels, however, with the exception that the profile meters 14, 14 'are deleted.

The lighting device l3c and the camera device F41 i measuring station AA is used (for the determination of vankant: -; c: el (fig. 1) of a front upper vane e) only if board 'rsfwts in in the measuring station A with the vane side down, so that vanl »- °! ' tzrrt after the turn will be upwards.

From the above it appears that the arrangement of; .- ~ .: de rear pillars 10b, profile meters 14, 14 'excluded, ar 1' a »: ït duplication of the arrangement at the front pillars Jia. : Arvid between the two measuring stations A and AA is a walker li; .r -: ;; - load in the cross conveyor 11, so that the board arrives in the other measuring station AA in upside down position.

All electrical and electronic equipment of the installation are fed and controlled from a per se known control and 468 107 10 valuation unit E (Fig. 2), which, if applicable, includes a pole reversing part P, and in which the output of the cameras signals for processing. Although this device for clarity does not appear in the other drawing figures, it does exist, of course included in all embodiments.

The system operates as follows: On the input the conveyor 20 is supplied with boards B, which at the input of the device transmission is transmitted to the cross conveyor 11, as shown the example is not provided with any carriers, and on this conveyor 11, they are introduced into the first of the first measuring station A. measuring zone A1, in which a board B 'present there is partly illuminated obliquely from above and from behind of the lighting device 12a (light beam L '), and partly straight from the top of the lighting device 12c (light cut L '").

Pictures of the camera device Kll are taken in this lighting of the upper flat side of the board B 'straight from the top, and of the camera K2l, pictures are taken of the front edge of the board at an angle from the top from the opposite direction than where the lighting comes from, ie from the front seen in the feed direction F.

When the board B 'has then been moved to the other measurement zone A2, it is illuminated obliquely from the front and from above, d: s from the opposite direction than in the measuring zone A1, of the lighting device II: (light beam L "), and the camera device K12 takes pictures of the dance B 'upper flat side straight from the top, while by camera command; f »' K22 pictures are taken of the front edge of the board from the same hole] sz-; the first measurement zone A1, but which is now from the pour, v @ :. f: the lighting is coming.

According to Fig. 4a, the two lighting device no. lb is replaced by a single lighting device 12ab sor r between the two measurement zones A1, A2 and is provided with an s- which allows light to emit only in the two directions towards m the measurement zones, and / or with a screen 19 ', which screens dc 2.? the zones apart.

In both measuring zones A1, A2 of the measuring station A obtain <_ -'- images showed that half of the circumference of the board: _ sections can be analyzed with image processing. When the board B 'has lar' measuring station A, it passes through the wand 100 and continues 1 upside down position to it (except on the profile feeders 14, 4-68 107 11 14 ') analogously constructed second measuring station AA, where measuring procedure repeated (except that the depth of the vane is not produced) and pictures are obtained which allow even the other half of the board circumference can be analyzed in the same way as before the forsu half.

The measurement of the other half can also be achieved so that the second measuring station AA 'is arranged according to Fig. 5 i upside down position on pillar 10b ', so that what was "from above" in the measuring station AA, now becomes direction "from below".

The distance between the measuring stations can be significantly reduced, because the inverter 100 is deleted.

The feed takes place in the plant according to Figs. 2-4. continuously and the cameras have a linear set of sensor menten. The function of the individual camera devices during measurement of the dimensions a'- f2 (Fig. 1) and obtaining information about the quality of surfaces a and b can be summarized as follows. _ When the board is fed into the plant with the narrower one flat side a up (such as the board B1 in Fig. 41, information is obtained mation om a of Kl and Klz (ie when lighting both right and left from through 12a and 12b): b "K3l" K32 (ie when lighting both right- and left- from through 13a and 13b): c "K22 (at oblique lighting through 12b); d n K42 (u n n n l3b); el "Kzl (when illuminated by 12c, which, however, does not illuminate c); 22 "Kil? fl "K42 (by l3b illuminating d, but not e), and f2 n When the board is fed with the wider flat side b up (son eg the board B2 in Fig. 4), analogous information is obtained about a of K31 and K32: c of K42; el of K4l; fl of K22, and b "K11" Klzï d "K22ï 22" K317 f2 "K32.

Fig. 6 schematically shows an alternative embodiment of the device according to Fig. 3, where the measuring station A ', like Fig. 3 has three steadily illuminating lighting devices l2a, l2b, 12c and two measuring zones A1, A2, but in addition also a third measuring zone A3, 468 107 12 which is located between the first two in the field of view of a camera device Kl3 with optical axis Kl3a '. The two lighting the devices 12a, 12b are arranged so that their beams L ' and L "partially intersect in the transport plane T. Thus three measuring zones are provided on the conveyor 11 ': A1 which is illuminated only of the rear view lighting device 12a (as Al in Fig. 3), A2 which is illuminated only by the lighting device 12b from top to front (as in Fig. 3), and A3 which is simultaneously illuminated of both lighting devices, ie from both directions.

In the measuring zone A3, a picture is thus taken of the board B at the illumination through both lighting devices l2a, l2b. It does not shown the second measuring station is constructed in a corresponding manner.

Fig. 7 shows another embodiment with identical three measuring zones A1-A3 as Fig. 6. While the lighting devices 12a and 12b are arranged in the same manner as in Fig. 6, include measuring tion A "above the cross conveyor ll a single camera device Kl1 "'with optical axis K11"' a ". Camera device K1l" '(which can 'are, for example, about 300 cm above the conveyor 11) is arranged for pivoting about a parallel to the longitudinal direction of the board B ' continuous axis C and for three-position imaging, i which its optical axis successively occupies the positions K11 "'a', K11a" 'a " and K11a "'a"' (in that order). Each time the camera device K11 "'returns to position Kll"' a ', has a new board in front tats in the measuring station.

Instead of swinging the camera device Kll "', can this is mounted fixedly and in its beam a optical element or a mirror element, for example a pivoting flat mirror or, according to Fig. 7a, a rotatable prism 15 is arranged, on which the optical axis of the camera device Kll '"a" is reflected so that it can sweep over all measuring stations of the measuring station.

While the arrangement according to Fig. 7 is functional resp in terms of results, the arrangement according to Fig. 6 is it is obvious that the optical axis Kll "'a can also be arranged for turning between only two turning positions, Kll "'a' and Kl1" 'a “', so that the device then corresponds in terms of function and result the device according to Fig. 3.

In the devices described so far, the measuring object has fed continuously transversely, but it can also be fed 468 107 13 stepwise transversely, and then used for video camera shooting which has a rectangular set of photodiodes.

Fig. 8 shows a device in which the board B 'steps forward fed on a cross conveyor 11 '. The lighting devices l2a od 12 are arranged in the same way as in Fig. 6 or 7, i.e.: beams L 'and L "partially intersect, so that in trans door plane T, the three measurement zones A1-A3 described above are achieved.

Above the conveyor ll 'is a single camera device K11 'mounted, which thanks to a suitably dimensioned rectangular learn set of sensor elements has a wide field of view that is limited of boundary beams Klla "and which covers all three measurement zones A1-A3.

A feeding step of the conveyor 11 'is advantageous equal to the movement from one measurement zone to the next, and the shooting always takes place when the conveyor is stationary.

While the measuring object has in the embodiments described so far the molds are fed transversely through the measuring station or stations, and the cross-transport movement was a condition for process, embodiments will now be described, there the measuring object is fed longitudinally (and then optionally continuously, or stepwise), respectively, which allow both types of feed.

During longitudinal feeding, the measuring object B 'is transported according to Fig. 9 through a measuring station AL with two measuring zones AL 'and AL " according to Figs. 10 and 11. The board B 'is supported by a conveyor 11 'which can be both a transverse conveyor and a longitudinal conveyor tör. In the case of a longitudinal conveyor, a second measuring tion in an upside-down position analogous to Fig. 5, while in the case of a transverse conveyor can in addition to this solution also a tedder used in Fig. 3.

In the measuring station AL ', the first measuring zone comprises Fig. 10 shows two steadily illuminating lighting devices 12a ', 12a " which are arranged on either side of the board B ', diametrically opposite each other along a first guideline R1.

The board B 'is occupied in this measuring zone AL' partly by a Camera set comprising K11 'and K3l 'which are arranged on either side of the board B' diametrically opposite each other along their to a common axis I 'coincide optical axes, which extend substantially perpendicular to the dance B 'directional surface (b, k, fig. 1), and partly by a first camera 468 107 14 order K21 'with the optical axis K21'a', this camera device alternatively can be replaced by a second camera set containing further comprising a camera device K41 'so that both camera devices are located on either side of the board B 'diametrically centered. against each other along their to a common optical axis I "together falling optical axes.

The lines R1 and K21'a '(or, where applicable, R1 and I ") encloses angles ß, ¶" with the line I ', where in the case with the longitudinal feed of the board B 'the angle'7' can also be 90 ° (as shown by dashed lines in the first camera device) K21 'or the second camera set), as needed there in the direction vertical to the line I 'no free space for moving the board B '.

In the second measuring zone AL "according to Fig. 11, the measuring target B 'of two steadily illuminating lighting devices l2b', l2b " which are arranged on either side of the board B 'diametrically opposite each other along a second guideline R2 which encloses an angle which may also be 90 ° with the first guideline R1 in the first mätzonen AL '.

The board B 'is occupied in this measuring zone by a camera with camera devices K12 "and K32" which are arranged on both sides of the board B 'diametrically opposite each other along theirs to a common optical axis II 'coinciding optical axes, which are parallel to the common optical axis I 'in the measuring zone AL ', and of a second camera device K22 "with the optical axis L22 "a '. This camera device may alternatively be replaced by another. a camera set further comprising a '4Z' camera device. wherein both camera devices K22 "and K42" are located; ¿ both sides of the board B 'diametrically opposite each other along a cf- optical axis II ", which may be parallel to d first guideline R1 in the first measurement zone.

Camera sets K11 '/ K31' and Kl2 '/ K32' are id «'- oriented in both measurement zones with their optical axes fc:.: - parallel to each other and perpendicular to the rilt of the measuring object surface.

When the measurement zones AL 'and AL "have for recording from side instead of camera sets only camera devices, is one of these camera devices K21 ', K22 "placed on the opposite side

Claims (33)

468 107 15 side about the axis I 'than the other about the axis II'. The lines R2 and K22 "a '(or where applicable R] and II" enclose mutually identical angles with the axis II', where in the case of the longitudinal feed the angle between the axes II 'and II "can also be 900 (as shown by dashed lines). lines of the fourth camera set), since then no free space is required for moving the board B 'in the direction perpendicular to the line II'. There are no obstacles to the transverse movement of the board B 'in the alternative embodiment, where the optical axes I "and II" enclose an angle other than 90 ° with the axes I 'and II', respectively. The measuring zones AL 'and AL "can therefore also be arranged next to each other for transverse feeding of the measuring object as for example in Fig. 2, instead in succession, as shown in Fig. 10. In all the embodiments of Figs. 10 and 11 with camera sets, the optical axes of the two camera devices included in a camera set may also run parallel to each other with a certain lateral displacement, i instead of coinciding. 'Patent claims A method for automatically inspecting measuring objects, the image of which in a camera has at least two longitudinal edges which delimit a straightening surface of a measuring object which is fed on a conveyor through at least one measuring station which has at least two successive measuring zones, and in which the measuring object in a first turning position steadily illuminated from at least two different directions by light with the same parameters, and occupied by at least two electronic output signals generating optoelectric detector devices partly straight from above and partly from at least one direction laterally, the output signals being input in a electronic evaluation unit, characterized in that the detector devices consist of camera devices and the measuring object is illuminated in one of the measuring zones obliquely from above from a first direction, and in the second measuring zone obliquely from above from opposite directions, whereby in both measuring zones it is recorded straight from above and partly from side, and 468 107 16 in this case in at least one of the measurement zones from mo set direction towards the lighting direction. IN Method according to claim 1, characterized in that the uptake from the side is effected obliquely from above. Method according to Claim 1 or 2, characterized in that the uptake from the side is effected in both measuring zones from the same direction. Method according to Claim 1 or 2, characterized in that the uptake from the side is effected in a measuring zone from the opposite, if applicable diametrically opposite, direction to the other measuring zone. Method according to one or more of Claims 2 to 4, characterized in that the measuring object is transported on a transverse conveyor and, in the measuring zone first located in the feed direction, the pick-up from the side is effected from the front. Method according to one or more of the preceding claims, characterized in that the measuring object is transported on a transverse conveyor and the illumination in the measuring zone first located in the feed direction is provided from behind. (Fig. 4) Method according to one or more of the preceding claims, characterized in that the lighting in the measuring zone first located in the feed direction is provided from the front. (Fig. 4a) Method according to one or more of the preceding claims, characterized in that the measuring object in one of the measuring zones is also illuminated straight from above. Method according to one or more of the preceding claims, characterized in that the measuring object further passes through a third measuring zone which lies between the first and the last measuring zone located in the feed direction, and is illuminated obliquely from above from the same two directions as in the two mentioned measuring zones. and is taken straight from the top. (Fig. 7, 8) Method according to one or more of the preceding claims, characterized by the measuring object is passed through a similar second measuring station in which it is treated in a second turning position, which is opposite the turning position in the first measuring station, in the same way as in the first measuring station. ll. Method according to one or more of Claims 4 to 9, characterized in that the measuring object in both measuring zones is also illuminated obliquely from below from a diametrically opposite direction to the illumination obliquely from above, and is also absorbed straight from below from a diametrically opposite direction towards the recording straight from above. (Figs. 10, 11) Method according to claim 11, characterized in that the recording from the side takes place in both said measuring zones also from a diametrically opposite direction. (Figs. 10, 11) Method according to Claim 11 or 12, characterized in that the pick-up from the side takes place obliquely from above and obliquely from above and below. (Fig. 10, 11) Method according to Claim 11 or 12, characterized in that the measuring object is transported on a longitudinal conveyor and the pick-up from the side takes place in a direction perpendicular to the direction of the pick-up straight from the top and bottom. (Figs. 10, 11) Method according to one or more of the preceding claims, characterized in that the measuring object is fed stepwise and is taken up in the standstill intervals between the feeding steps. Method according to one or more of the preceding claims, characterized in that the lighting devices are supplied with direct current, the polarity of which is periodically reversed in order to avoid the oblique load of the lighting devices. Method according to one or more of the preceding claims, characterized in that the measuring object in one of the feeding zones is sensed by at least one non-contact profile measuring device at least from a direction in the direction perpendicular to the directing surface. Device for automatic inspection of carpet objects whose image in a camera has at least two longitudinal edges so: limits a straightening surface of the measuring object, by the method en2.1: any one or more of the preceding claims, comprising a conveyor (11) for feeding the measuring object (B) ; at least: 'fr measuring station (A) which comprises two measuring zones (A1, A2) and L x ..- ken are at least two lighting devices (12a) and again: fv an optoelectric detector device (K11) arranged; an electronic evaluation unit (E) for receiving and processing all the output signals of the detector devices, characterized in that the detector devices consist of camera devices, and that the night station comprises - at least one first illuminating device (lza) steadily in operation (lza); for illuminating the measuring object obliquely from above from a first direction; a first camera device (K111) directed from above (K11a ') straight downwards towards the measuring object on the conveyor; - a second camera device (K21) which is directed (K 21a ') towards the measuring object from the side in such a way that its field of view coincides with the area of the first camera device in the area illuminated by said first lighting device at and / or above the conveyor, which area forms a first measuring zone (A1) in the measuring station; - at least one second, steadily illuminating lighting device (12b) for illuminating the measuring object with light with the same parameters as the first lighting device obliquely from above from a second direction relative to the lighting in the first measuring zone; a third camera device (K12) which is directed from above (Kl2a ') straight downwards towards the measuring object on the conveyor; a fourth camera device (K22) which is directed (K22a ') towards the measuring object from the side in such a way that its field of view coincides with that of the third camera device in the area illuminated by the second lighting device at and / or above the conveyor, which area forms a second measuring zone (A2) in the measuring station, wherein in at least one of the measuring zones the camera device (K21, K21 ') for recording from the side is arranged for recording from the opposite direction to where the illumination (12a, 12a') comes from. Device according to claim 18, characterized in that the second and fourth camera devices are oriented parallel to each other and such that their optical axes enclose an angle (of the order of 45 ° with the feed direction (F) of the conveyor. Device according to Claim 18 or 19, characterized in that in one of the measuring zones, above the conveyor, a lighting device (12c) which is stable in operation is arranged for illuminating the measuring object straight from above. . Device according to one or more of Claims 18 to 20, characterized in that between the first and the second measuring zone, above the transverse conveyor, there is a steadily illuminating lighting device (12ab) and a screen (19, 19 '). ) arranged to illuminate the measuring object in the first and in the second measuring zone obliquely from above from different directions. (Fig. 4a) Device according to one or more of claims 18-21, characterized in that the conveyor is a transverse conveyor and that after said measuring station a similar second measuring station (AA) is arranged in the conveying direction of the conveyor in the same orientation as the first measuring station, wherein between the two measuring stations an inverter (100A) is arranged by which the measuring object is turned upside down, so that in the second measuring station it is treated in the opposite turning position towards the first measuring station. Device according to one or more of claims 18-21, characterized in that the conveyor is a cross conveyor and that after said measuring station a second similar measuring station is arranged in the upward direction of feeding of the cross conveyor, so that the measuring object is treated in the the second measuring station in the opposite turning position to the first measuring station. Device according to one or more of Claims 18 to 23, characterized in that the measuring station comprises a third measuring zone (A3) which is located between the first and the second measuring zone (A1, A2) and comprises a camera device (K13) for recording of the measuring object straight from above, whereby the measuring object is illuminated there obliquely from above by the lighting devices, of which it is illuminated in the first and the second measuring zone. Device according to one or more of the patent claims 18-24, characterized by a single straight-down, fixedly mounted camera device (Kl1 ') which has such a wide field of view that it encompasses all the measuring zones in the measuring station. Device according to one or more of Claims 18 to 24, characterized by a single straight-down, fixedly mounted camera device (K11 "') in the field of view of which a rotatable mirror element (15) is arranged, so that this field of view in turn and order can sweep over all the measurement zones in the measuring station. Device according to one or more of Claims 18 to 24, characterized by a single camera device (K11 ") so as to be pivotally mounted downwards so that the field of view of the camera device can in turn sweep over all the measuring zones in the measuring station. 468 107 20 Device according to one or more of the claims 18-27, characterized in that in one of the measuring stations at least one non-contact profile measuring device (14) is arranged for measuring the measuring object at least from a hob in the direction perpendicular to the directing surface. Device according to one or more of Claims 18 to 28, characterized in that in the first and in the second measuring zone (AL ', AL ") there is furthermore a lighting device (12a", 12b') for illuminating the measuring object obliquely from below. from a diametrically opposite hob towards the lighting obliquely from above, and a camera device (K32 ', K33 ") for picking up the measuring object arranged directly from below. Device according to claim 29, characterized in that in each of the first and / or the second measuring zone there are two camera devices (K41 ', K42') for receiving the measuring object from the side so arranged that the measuring object is picked up from diametrically opposite directions in sidled. Device according to Claim 29 or 30, characterized in that the optical axes (K21'a ', K22 "a') of the camera devices for side capture include an angle other than 90 ° with the optical axes (I '). , II ') of the straight-up and bottom-capturing camera devices. Device according to claim 29 or 30, characterized in that the conveyor is a longitudinal conveyor and the optical shafts (K21'a ', K22 "a') of the camera devices for side recording enclose an angle of 90 ° with the optical shafts (I ', II') of the straight-up and bottom-capturing camera devices. Device according to one or more of claims 18-32, characterized in that the lighting devices are arranged for supply with direct current and that a pole reversing part is present for periodically reversing the polarity of the current in order to avoid skewed loading of the lighting devices. : M