DE202015004790U1 - Optical inspection device for testing the surfaces of articles of the food and beverage industry, in particular the tobacco processing industry and the pharmaceutical industry - Google Patents

Abstract

Device for optical testing of articles of the food and beverage industry, in particular the tobacco processing industry and the pharmaceutical industry, comprising an image capture device (6, 16, 26), which at least one image sensor (1, 11, 21) and at least one illuminating means for illuminating to the article to be tested, characterized in that the at least one luminous means is designed as an OLED illuminant, wherein the image capture device (6, 16, 26) a plurality of side by side in one, preferably in at least two parallel rows, in particular arranged like a matrix OLED illuminant includes, which are particularly preferably formed as separately switchable OLED tiles (4, 14, 24) or OLED films (5, 15, 25).

Description

The invention relates to a device for the optical, in particular online testing of articles of the food and beverage industry, especially tobacco processing industry and the pharmaceutical industry comprising an image capture device.

In the context of this invention, articles of the tobacco-processing industry are understood to mean, in particular, rod-shaped, cuboid and strip-shaped articles, for example objects such as filter cigarettes, e-cigarettes, cigarillos, filter rods, multi-segment filter rods or wrapping material strips and cigarette packets. In the context of this invention, articles of the food industry are understood to mean, in particular, objects such as wrapped or packaged confectionery, nutritional supplements, spices, tea, coffee, etc. In the context of this invention, articles of the pharmaceutical industry are understood in particular to include objects such as capsules, films, ampoules, blister strips or syringes, as well as pharmaceutical packaging and cosmetics. In the optical inspection, quality features are detected on the respective articles, such as dimensions, surface finish, integrity, segment or component identification, segment or component positioning, stamp imprints, stamps, labels, etc.

For optical inspection, digital cameras are increasingly used in offline test systems, which are equipped with elaborate, large lenses because of the requirement for imaging and resolution quality. To z. For example, to consider the articles as a whole without distortion and deterioration of sharpness, a considerable distance of the measurement object to the camera is necessary. At many points of a multi-segment filter machine, filter attachment machine, packaging machine or film wrapping and film winding machine, however, a visual inspection with such large systems is often not given due to geometric conditions in these machines. In addition, long optical paths with mirrors and / or prisms are to be provided.

The lighting of the measurement objects is regularly realized with separate light sources, which must have high light levels because of the large distance to the object, generate unwanted heat and build relatively large, such as, halogen lamps. Also, the lighting means, such as halogen lamps and incandescent lamps as well as discrete LEDs have the disadvantage of uneven illumination, in particular, edge attenuation occurs, which is attempted by optical lenses to correct. In addition, difficulties in detecting reflective surfaces occur.

From the DE 10 2004 040 912 A1 For example, a device for optically inspecting articles of the tobacco processing industry is known which comprises an image acquisition device having gradient index lenses to reduce the distance between the image acquisition device and the articles to be inspected. The disadvantage is there on the one hand, the very narrow image capture area and on the other hand, the extremely high number of individual elements, which must be mounted, interconnected and controlled so that this solution has not been proven in practice.

The EP 0 812 548 B1 discloses a device for monitoring the external integrity of cigarettes, which are conveyed transaxially on a conveyor drum on a plurality of TDI line scan cameras and are rotated on the conveying path about its longitudinal axis, which requires an additional expenditure of drive means. The line scan cameras are used so that each image line of a line scan camera makes a single stripe-like photograph of a longitudinal section of a cigarette surface. Since the number of line scan cameras is limited, only a number of sections of the cigarette surface corresponding to the number of line scan cameras are inspected, but not the entire surface. Furthermore, the device lacks a separate illumination there and is thus dependent on rather accidental lighting conditions of the environment.

In contrast, it is an object of the present invention to provide a compact construction device for optical testing in particular of articles of the tobacco industry and the pharmaceutical industry, which is directly integrated into different types of manufacturing and packaging machines, in particular close to the article to be tested.

Based on this prior art, it is also an object of the present invention, the optical inspection of the surface of articles, in particular with regard to a detection of defects and / or in terms of completeness and / or placement of an imprint, a seal, a mark or Similar to the surface of the article, to improve, as well as to illuminate the surface of the article evenly with inexpensive bulbs.

Based on this prior art, it is a further object of the present invention to detect the optical inspection of the surface of articles, in particular the surface of the article in sections at least twice for the purpose of joint evaluation.

This problem is solved by the use of a device for optical inspection articles of the food and beverage industry, in particular the tobacco processing industry and the pharmaceutical industry, which is of modular design and cooperates with a conveying means for the articles to be tested, tested or measured. In the context of the invention, such conveying means are in particular conveying drums, winding drums, cutting drums, winding turrets or folding plates as well as trough or chamber belts. Preferably, this object is achieved in that the device for checking the article mechanically independent, but immediately adjacent to or to the respective funding in a manufacturing and / or packaging machines can be integrated.

This object is achieved according to a first aspect, namely the lighting by the use of a device for optical testing of articles of the food and beverage industry, especially tobacco processing industry and the pharmaceutical industry by means of image sensors using at least one row or arranged as an array OLED bulbs. Hereby, a particularly flat design of the bulbs and at the same time a particularly uniform illumination of the article to be tested is achieved.

In accordance with the invention, rod-shaped, cuboid and / or strip-shaped articles can thus be checked in a simple manner with regard to various quality parameters as well as further properties by means of the image sensors provided. The OLED tiles and / or OLED foils provided according to the invention for illuminating the articles make it possible, in particular, for the part of the optical test device which ensures the illumination of the articles to have a small design. A particularly effective illumination is given when several side by side, especially in a row, arranged OLED tiles and / or OLED films are used for lighting.

In the context of the invention, OLED tiles are flat rectangular OLED illuminants which correspond in their dimensions to the dimensions of the image sensors or correspond with them. As an example, a sensor chip diagonal of 2/3 ", 1" or 4/3 ", preferably in 4: 3 format, may be mentioned here. It is defined as corresponding in the sense of the invention that the side length of at least one side of the OLED tile is substantially equal to a side length of an adjacent sensor chip or is an integer multiple of a side length of the sensor chip. The same applies to the OLED foils. The OLED films also allow a training, which has a concave curved surface. The concave surface may be circular arc, quasi formed as a cylinder barrel portion, wherein the imaginary center axis lies within the cross section of the article to be tested, in particular coincides with the central axis of a rod-shaped article or strand of material. The concavely curved surface of the OLED film may be parabolic in cross section for special test requirements.

The object is achieved in particular by a device for optically testing articles in the food and beverage industry, in particular the tobacco processing industry and the pharmaceutical industry, comprising an image acquisition device which has at least one image sensor and at least one light source for illuminating the article to be tested, wherein the at least a light-emitting means is designed as an OLED light-emitting means, wherein the image detection device comprises a plurality of side by side in one, preferably in at least two parallel rows, in particular arranged like a matrix OLED light source.

In a preferred embodiment of the invention, the image capture device comprises a plurality of side by side in one, preferably in at least two parallel rows, in particular arrayed OLED bulbs, which are designed as separately switchable OLED tiles or OLED films. The above advantageous embodiment allows, on the one hand, a targeted activation of each individual OLED tile or OLED foils to predetermined positions of the article to be tested on the moving conveyor. On the other hand, such a modularization makes it possible to divide the surface of the article (s) to be examined into sectors or test zones of particular interest (ROI) and to selectively switch the respective OLED illuminant. The abbreviation "ROI" is here, d. H. in the measuring and testing technology for "Region of Interest" and means in German "area of interest".

A further advantageous embodiment is characterized in that the image capture device has at least two OLED illumination means which are designed and configured to emit light of different wavelengths, the different wavelengths, in particular in the ranges from 450 nm to 500 nm and / or from 500 nm to 550 nm and / or 550 to 600 nm and thus in the visible light range. In this area, the LASER OLED bulbs fall, which is inventively provided to cover a range up to 700 nm or higher, the laser class 2 according to EN 60825-1: 2007 is not exceeded, or the continuous wave power is a maximum of 1 mW.

A further advantageous embodiment is characterized in that the OLED bulbs light in the infrared range (IR) and / or in the near Infrared range (NIR), ie in the range from 780 nm to 1400 nm.

In a preferred development, the image acquisition device comprises a plurality of image sensors arranged side by side, in at least one row, preferably in two or three parallel rows, which are CCD or PSD sensors or preferably CMOS sensors or particularly preferably HDRC sensors (high dynamic -Range CMOS sensor) are formed.

According to the invention more than one CCD sensor, PSD sensor, CMOS sensor or HDRC sensor are combined in a row or in an array and are designed and set up, both together, for example, as a row or as an array as well as individually switchable. Such an image sensor array or such an image sensor array corresponds in its dimensions according to the invention with the dimensions of an adjacent OLED illuminant row or an adjacent OLED illuminant array. For example, at least one row of four image sensors and at least two rows each with four OLED tiles form a so-called inspection array with 3 × 4 fields.

The term "row" of image sensors is in the context of the present invention different from the term "line", as it is also known in image sensors, namely in a "series" of image sensors, at least two image sensor chips are arranged immediately adjacent, for. B. Two 1 '' - image sensors with a 4: 3 aspect ratio, with a gross diagonal of 25.4 mm, with an edge area is included for connection and control means. The net diagonal of the active sensor area in this example is 16.0 mm and the width is 12.8 mm. The (gross) width of the image sensor chip in this case is 20.3 mm, so that a series of five 1 '' image sensors has a width of 101.5 mm in total. On the other hand, a "line" of image sensors refers to individual image sensors within the active sensor surface, which are preferably also separately switchable. The gap between two adjacent active sensor surfaces is bridged with respect to the image by suitable optical lenses in the edge zones of the respective. The aforementioned dimensions can vary from chip manufacturer to chip manufacturer.

Lens or lens systems are advantageously adapted to the image sensors, in particular each image sensor is associated with at least one cylindrical lens having a rectangular cross-sectional area, wherein the aspect ratio and the diagonal of the cross-sectional area substantially equal to the corresponding dimensions of the image sensor chip and wherein the at least one cylindrical lens in particular as plan Concave cylindrical lens or is formed as a combination of plano-convex and concave cylindrical lens or are. The area of the or each cylindrical lens is thus larger than the active sensor area, namely preferably approximately equal to the (gross) area of the image sensor chip. The superior cylindrical lenses also protect the active sensor surfaces against dust and damage.

In a special development, the image acquisition device has at least two image sensors arranged in parallel, which are designed and set up in conjunction with suitable lens systems for recording a stereo image and / or a 3D image of an article.

In a preferred refinement of the device, the image capture device has a first control device which is designed and set up to control the intensity of light and to switch it on / off, in particular in less than 1 ms, of the OLED illuminant. Furthermore, a second control device for controlling a further image sensor array and / or a further image sensor array may be provided, which is synchronized with the first control unit, wherein the required control signals, in particular with regard to the switching time are determined by the signals of a rotary encoder or a position encoder.

In a further preferred embodiment of the device, the image acquisition device has an evaluation unit which, for comparing the images of a predetermined test sector of the surface (ROI) of the same article recorded one after the other in two or more rows of sensor array images successively row by row, is designed and furnished.

As a result, an efficient optical inspection of the article is possible. For example, when testing multi-segment filters or other multi-segment articles, in particular with more than two segments, a proper arrangement of the segments can be stored and compared with the captured image of the multisegment article to be tested. If, for example, an excessive or impermissible deviation occurs in the intensity distribution, the correspondingly tested articles can subsequently be eliminated from production. With regard to such an evaluation, the multi-color evaluation according to the invention has proven to be particularly advantageous. The evaluation unit is assigned a memory unit which stores the images for comparison of the image of a test sector acquired with a first light color and the image acquired with a second light color with a reference image of the same test sector (ROI) stores. On the basis of the comparison result, the evaluation unit generates a control signal which represents a proper product or a product to be complained of.

Since a lighting device is provided with a light source in the form of an OLED tile or OLED film, this can be realized extremely flat to save space. The illumination is particularly effective if a plurality of OLED tiles arranged side by side, in particular in a row, are provided, which correspond in their dimensions to the adjacent image sensors or cameras. In a preferred refinement, the OLED lighting means are arranged arcuately with respect to the longitudinal center axis of the article, in particular in the form of a polygonal sheet around the longitudinal center axis of the article to be tested, the illuminants advantageously having a constant distance to the article surface at least in pairs.

In addition, a solution of the object is achieved by an arrangement for optically testing the surface of rod-shaped articles of the tobacco processing industry, especially cigarettes, filter rods or Multisegmentfilterstäbe or other multi-segment or crimped, rolled or wound foil rods by means of a receiving trough formed with conveying drum for transverse axial promotion of rod-shaped articles.

A development of the arrangement is characterized in that at least four, preferably eight, more preferably at least twelve OLED lamps are provided for illuminating a rod-shaped article to be tested, the OLED lamps in the form of OLED tiles or OLED films in groups a group having two or a multiple of two OLED tiles or OLED films.

Preferably, a solution of the problem by a machine of the food and beverage industry, in particular the tobacco industry and the pharmaceutical industry, with a device for optical testing of articles of the food and beverage industry, the tobacco processing industry or the pharmaceutical industry during the conveying movement and with a conveyor, preferably with a rotating conveyor, on which the articles to be controlled are arranged, wherein the optical test device has at least one image sensor row or at least one image sensor array and at least one OLED illuminant, and a display and control device, which set up and designed is to simultaneously display the images of the same test sector captured by the image sensor arrays or image sensor arrays.

In particular, a solution of the object by a machine of a first type, wherein the machine comprises a plurality of conveyor drums, wherein the machine is at least partially designed as a filter application unit, as Multisegmentzusammenstelleinheit and / or as a film winding unit, wherein the test article, in particular filter rods, multi-segment articles , Cigarettes or film roll transversely axial to the plurality of transverse to the conveying direction side by side and / or in the conveying direction successively arranged OLED sheets or OLED films and at least one image sensor row or the least one image sensor array are fed, which preferably with respect to the longitudinal center axis of the rod-shaped Article arcuate, in particular in the form of a polygonal sheet around the longitudinal center axis of the rod-shaped article to be tested are arranged and wherein the OLED bulbs advantageously at least in pairs a constant distance to the article surface e and on the at least one image sensor row or the least one image sensor array can be moved past.

Furthermore, a solution of the object by a machine of a second type, which comprises a multi-segment or a tobacco or a cigarette or a Filterstrangeinheit, each comprising at least one conveyor belt and / or format belt and / or suction conveyor belt and / or a roller conveyor, wherein the rod or strand-shaped articles to be tested or a material strand, in particular filter rods, multi-segment articles, cigarettes, film rolls or a tobacco, cigarette or filter strand along the axial axis of the plurality of transverse to the conveying direction side by side and / or in the conveying direction successively arranged OLED tiles or OLED films and the at least one image sensor array or the at least one image sensor array are guided, which preferably arcuate with respect to the longitudinal center axis of the article, in particular in the form of a polygonal Bogenzugs about the longitudinal center axis of the rod-shaped article to be tested or to be tested Material strand are arranged and wherein the OLED bulbs advantageously at least in pairs have a constant distance from the article surface.

In addition, a solution of the problem by a machine of a third type, which has at least one winding turret and / or folding plate and / or drying wheel, wherein the machine is designed as a packing machine and / or as a film wrapping machine. The cuboidal articles, in particular packages, containers or rods to be tested, are transverse to their longitudinal extent at the plurality of OLED tiles or OLED films arranged side by side transversely to the conveying direction and / or in the conveying direction and at least one image sensor row or at least one An image sensor array vorbeiführbar, which are preferably arranged arcuately with respect to the longitudinal center axis of the cuboid article arcuate, in particular in the form of a polygonal Bogenzugs about the longitudinal center axis of the cuboid article to be tested.

Finally, a solution of the problem by a machine of a fourth type, which is designed as an automatic measuring machine, wherein the test article, in particular filter rods, multi-segment articles, cigarettes, foil winding rods or packages transaxially or longitudinally axially to a plurality of juxtaposed and successively arranged OLED bulbs and at least one image sensor row or at least one image sensor array are guided past.

The device according to the invention for optically testing the surface of rod-shaped articles of the tobacco processing industry, in particular cigarettes, cigarillos, filter rods, multi-segment filter rods, multi-segment rods or crimped, rolled or wound foil rods, makes it possible to carry out a test method by means of a number n (n = 2 to 128) of several OLED illuminants, the surface of a, preferably transversely promoted, rod-shaped article, in particular on a rotating conveyor drum, is illuminated at different illumination angles, preferably the rod-shaped articles respectively in receiving troughs on a conveyor drum during the optical examination, preferably transaxially promoted be switched, the OLED lighting means by means of a control device in a predetermined order, preferably individually and successively, for a predetermined period of time, that in each case a first OLED Illuminant illuminates the rod-shaped article with a first wavelength of light and a second OLED illuminant illuminates the rod-shaped article in a second wavelength, wherein at least one image capture device is provided, so that by means of the image capture device at least two OLED illuminants illuminated surface sector of the rod-shaped article each predetermined light wavelength of the OLED light source is detected separately and can be evaluated for a subsequent evaluation unit or are.

The invention will be described below without limiting the general inventive idea using exemplary embodiments. With regard to all details of the invention not explained in detail in the text, reference is made to the drawings. Show it:

1 a schematic side view of an arrangement of conveyor and optical inspection device according to the invention,

2 a schematic plan view of an arrangement of funding and optical inspection device according to the invention in a first embodiment to 1 .

3 a schematic side view of the optical inspection device according to the invention in a second embodiment,

4 a schematic side view of the optical inspection device according to the invention in a third embodiment,

5 a schematic view of the optical inspection device according to the invention in a fourth embodiment,

6 a developed view of the optical inspection device according to the invention in a fifth embodiment.

7 a developed view of the optical inspection device according to the invention in a sixth embodiment.

8th a developed view of the optical inspection device according to the invention in a seventh embodiment,

9 a developed view of the optical inspection device according to the invention in an eighth embodiment,

1 shows a schematic side view and the 2 shows a corresponding plan view of an arrangement consisting of a conveyor drum 30 and an optical inspection device according to the invention in a first embodiment, wherein the covers of the optical sensors and the OLED bulbs are not shown for the sake of transparency. Such conveyor drums 30 are in Filteransetzmaschinen for conveying rod-shaped articles, in particular of tobacco rods 38 , Filter plugs 39 and filter cigarettes 37 provided simple and multiple use length. The conveyor drum 30 has distributed over the circumference a number of uniformly spaced receiving troughs 32 for receiving the rod-shaped article. The receiving troughs 32 are formed as Saugmulden with Saugluftbohrung, which are in operative connection with a vacuum supply. The suction holes are in 2 not recognizable, since these from the filter cigarettes 37 are covered. As the 2 can be seen is the conveyor drum shown 30 for a two-lane conveyance of filter cigarettes 37 provided, ie in the manufacturing process in a Filteransetzmaschine immediately after cutting and spreading the filter cigarettes 37 on a cutting drum, not shown, and a spreading drum, also not shown. On a Spreading drum previously cut rod-shaped articles for further processing steps are longitudinally spaced axially. Above the conveying surface of the conveyor drum 30 a two-lane optical test device is shown, which six image sensor rows 2 . 12 . 22 each having two OLED films 5 . 15 . 25 flanked to a first peripheral portion of the filter cigarettes 37 regardless of the ambient light, while being picked up by the image sensors 1 . 11 . 21 to illuminate. In the embodiment according to 2 Each train has eight image sensors 1 . 11 . 21 to an image sensor rows 2 . 12 . 22 summarized. The image sensor rows 2 . 12 . 22 are in pairs parallel to the receiving troughs 32 and to the axis of rotation of the conveyor drum 30 arranged at an angle which is preferably substantially equal to the angle of the receiving troughs 32 to the axis of rotation of the conveyor drum 30 is. In the embodiment according to 1 and 2 the angle is 22.5 °. It is advantageous in the sense of a simple association, in particular, if the angle is the image sensor rows 2 . 12 . 22 to each other in an integer relation to the receiving troughs 32 is that the angle is two or three times or half or one third, etc. of the angle of the receiving wells 32 is. The current angle of the conveyor drum 30 will, how 3 can detect, by means of a rotary encoder 31 directly and / or indirectly to the synchronization units 41 . 42 . 43 , to the image processing unit 40 and the evaluation unit 44 as well as to the machine control 47 transmitted. The divisions or the respective number of receiving troughs 32 the conveyor drums are in a data and image storage unit 45 and / or in the evaluation unit 44 and in machine control 47 deposited so that an angle-accurate control of the image sensors 1 . 11 . 21 , the image sensor rows 2 . 12 . 22 and the OLED foils 5 . 15 . 25 is possible. Here, the OLED films 5 . 15 . 25 not only individually or jointly controlled as a whole, ie switched on and / or off, but it is also provided according to the invention, individual segments or rows of OLED films 5 . 15 . 25 to control, wherein the same or another wavelength of light (light color), in particular rotational angle or position-dependent on or off can be. This makes it possible in an advantageous manner to detect particularly difficult to evaluate surfaces or surface features, for example. Partially shiny surfaces or surfaces with almost the same dark colors. The 3 shows a block diagram of the optical inspection device according to the invention in a second embodiment, wherein first again three image capture devices 6 . 16 . 26 are shown in a side view. The difference to the image capture devices 6 . 16 . 26 in 1 is that every image sensor 1 . 11 . 21 upstream and downstream of each two OLED films 5 . 15 . 25 or OLED tiles 4 . 14 . 24 flanked with the image sensor 1 . 11 . 21 form a polygonal curve in cross section. As a result, a more uniform illumination of a convex Prüfobjektoberfläche is achieved. Each image capture device 6 . 16 . 26 is a synchronization unit 41 . 42 . 43 assigned, the image sensors 1 . 11 . 21 and the neighboring OLED foils 5 . 15 . 25 or OLED tiles 4 . 14 . 24 by control lines with the associated synchronization unit 41 . 42 . 43 are connected. The synchronization unit 41 . 42 . 43 are in turn with the evaluation unit 44 and this with the machine control 47 connected. From the evaluation unit 44 is in evaluation results of the individual articles that lie outside predetermined limits and / or have certain characteristics or not - the example. In the data and image memory unit 45 are deposited - an eject signal generated, which to an ejection control 46 is forwarded, the ejection control 46 as a separate hardware and / or software module or as a subroutine in the machine control 47 can be trained. Finally, the machine control 47 with a touch-sensitive display device 48 connected, which is designed and furnished, at least two pictorial representations of a test sector (ROIs) 10 display, zoom out of it by means of gesture control to enlarge or zoom and / or move. It is also planned to vary limit values as well as pictorial representations of a test sector (ROI) 10 to be accepted as acceptable or unacceptable. In a further embodiment, the configuration of an image capture device is provided 6 . 16 . 26 inter alia, the wavelength of light or the light color of individual OLED films 5 . 15 . 25 or OLED tiles 4 . 14 . 24 online at the display device 48 to vary so as to take into account a special test object.

The 4 shows a further schematic side view of an optical inspection device according to the invention in a third embodiment. The difference to the image capture devices 6 . 16 . 26 in the 1 and 3 is that every image sensor 1 . 11 . 21 upstream and downstream of each concave OLED film 5 . 15 . 25 flanked. As a result, even more uniform illumination of the convex test object surface is achieved. Furthermore, the image capture devices 6 . 16 . 26 in 4 recognize an optical lens system, which in the beam path between each image sensor 1 . 11 . 21 and one on a conveyor drum 30 Queraxial promoted filter cigarette 37 arranged and with the image sensor 1 . 11 . 21 connected is. The lens system comprises in the exemplary embodiment a plano-concave and a convex cylindrical lens 7 . 17 . 27 , wherein the longitudinal axis extends in the image plane. As the 4 continues to recognize, corresponds to the length of the Narrow side of the active sensor surface of an image sensor 1 . 11 . 21 about the diameter of a filter cigarette to be tested 37 , the cylindrical lenses 7 . 17 . 27 correspond in width substantially the length of the narrow side of the image sensor 1 . 11 . 21 This, on the one hand, makes a flat image of the visible surface of a filter cigarette 37 and on the other hand achieved a compact design. The 5 shows a further schematic side view of an optical inspection device according to the invention in a fourth embodiment. The difference to the image capture devices 6 . 16 . 26 in the 1 . 3 and 4 is that the image sensor 1 . 11 . 21 together with cylindrical lenses 7 . 17 . 27 and the concave curved OLED foils 5 . 15 . 25 circular around the article to be tested, namely a fiber strand 35 are arranged. The conveying direction of the fiber strand 35 For example, a wrapped tobacco rod or a filter tow is there in the image plane.

The 6 shows a developed view of another optical inspection device according to the invention in a fifth embodiment, wherein the article, for. B. a hinge-lid pack, by means of a conveyor, transversely to three image sensors 1 . 11 . 21 together with assigned OLED tiles 4 . 14 . 24 a test facility is passed. The conveying device is preferably a conveying device which is present in any case in a packaging machine or wrapping machine, such as, for example, a winding or folding turret, a folding plate, a tweezer wheel or a chamber belt. With the test device shown an arrangement is created in which a special test sector (ROI) 10 In view of three different features is very easy to evaluate, it can in particular a hologram, a stamping profile, a price overprint and / or an invisible to the human eye Authentikitätskodierung be checked for correct training out. In addition, a particularly flat design is feasible.

The 7 shows a developed view of an optical inspection device according to the invention in a sixth embodiment, wherein the article, here a double cigarette 34 is passed transaxially by means of a conveyor to a testing device which an image sensor array 3 and two groups of four OLED slides 5 includes.

The 8th shows a developed view of the optical inspection device according to the invention in a seventh embodiment, wherein the article, here a single cigarette is passed transaxially past a triple tester, which three spaced image sensor rows 2 . 12 . 22 includes, each of two OLED films 5 . 15 . 25 flanked. This makes it possible in the conveying direction in a particularly simple manner, the same test sector (ROI) 10 evaluate with different lighting.

The 9 Figure 8 shows a part of a development diagram of the optical inspection device according to the invention in an eighth embodiment, wherein the articles, for example three spaced fiber or multi-segment strands are passed longitudinally axially past a triple tester which comprises three spaced image sensor rows 2 . 12 . 22 , In the exemplary embodiment, each with three image sensors 1 . 11 . 21 comprising, wherein the image sensor rows 2 . 12 . 22 , in the embodiment on both sides of three OLED tiles 4 . 14 . 24 flanked. This makes it possible in the conveying direction in a particularly simple manner, the same test sector (ROI) 10 evaluate with different lighting.

LIST OF REFERENCE NUMBERS

1, 11, 21

image sensor

2, 12, 22

Array image sensor

3, 13, 23

Image sensor array

4, 14, 24

OLED tile

5, 15, 25

OLED film

6, 16, 26

Image capture device

7, 17, 27

cylindrical lens

10

Testing sector (ROI)

30

conveyor drum

31

Rotary encoder

32

receiving trough

34

double cigarette

35

tow

36

pack

37

filter cigarette

38

tobacco rod

39

filter plug

40

Image processing unit

41, 42, 43

synchronizing

44

Evaluation arithmetic unit

45

Data and image storage unit

46

ejection control

47

machine control

48

display

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102004040912 A1 [0005]
• EP 0812548 B1 [0006]

Cited non-patent literature

• EN 60825-1: 2007 [0016]

Claims (12)

Device for optical testing of articles of the food and beverage industry, in particular the tobacco processing industry and the pharmaceutical industry, comprising an image capture device ( 6 . 16 . 26 ), which at least one image sensor ( 1 . 11 . 21 ) and at least one luminous means for illuminating the article to be tested, characterized in that the at least one luminous means is designed as an OLED luminous means, wherein the image capturing device ( 6 . 16 . 26 ) a plurality of juxtaposed in one, preferably in at least two parallel rows, in particular matrix-like arranged OLED bulbs, which particularly preferably as separately switchable OLED tiles ( 4 . 14 . 24 ) or OLED films ( 5 . 15 . 25 ) are formed. Device according to claim 1, characterized in that the image capture device ( 6 . 16 . 26 ) has at least two OLED illuminants which are designed and arranged to emit light of different wavelengths, the different wavelengths in particular in ranges of 450 nm to 500 nm and / or from 500 nm to 550 nm and / or 550 to 600 nm and / or 700 to 1400 nm. Device according to claim 1 or 2, characterized in that as OLED films ( 5 . 15 . 25 ) formed OLED bulbs have a concave curved surface, wherein the concave curved surface of the OLED film ( 5 . 15 . 25 ) is preferably formed in cross section circular arc or parabolic. Device according to one of claims 1-3, characterized in that the image capture device ( 6 . 16 . 26 ) a plurality of side by side, in at least one row, preferably arranged in two or three parallel rows of image sensors ( 1 . 11 . 21 ), which are designed as CCD or PSD or preferably as CMOS sensors or particularly preferably as HDRC sensors (high-dynamic-range CMOS sensors), wherein the image sensors ( 1 . 11 . 21 ) have a rectangular sensor surface with a useful diagonal in the range of 11.0 mm to 28.4 mm. Device according to one of claims 1-4, characterized in that each image sensor ( 1 . 11 . 21 ) at least one cylindrical lens ( 7 . 17 . 27 ) is associated with a rectangular cross-sectional area, wherein the aspect ratio and the diagonal of the cross-sectional area substantially equal to the corresponding dimensions of the image sensor chip and wherein the at least one cylindrical lens ( 7 . 17 . 27 ) in particular as a plano-concave cylindrical lens ( 7 . 17 . 27 ) or as a combination of plano-convex and concave cylindrical lens ( 7 . 17 . 27 ) is or are formed. Device according to claim 4 or 5, characterized in that the image capture device ( 6 . 16 . 26 ) two parallel image sensors ( 1 . 11 . 21 ) designed and arranged to receive a stereo image and / or a 3D image of an article. Device according to one of claims 1-6, characterized in that the image-capturing device ( 6 . 16 . 26 ) has a first control device for the OLED lighting means, which is designed and set up to switch the OLED lighting means on and off in less than 1 ms, and in that the image sensing device ( 6 . 16 . 26 ) a second control device for the image sensors ( 1 . 11 . 21 ), which with the first control unit by means of a synchronization unit ( 41 . 42 . 43 ) is synchronized, wherein the signals required for switching on the OLED lighting means of the synchronization unit based on the signals of a rotary encoder ( 31 ) or a Weggebers are determined. Device according to one of claims 1 to 7, characterized in that the image capture device ( 6 . 16 . 26 ) an evaluation unit ( 44 ), which, for comparison, the image sensors arranged side by side in two or three rows ( 1 . 11 . 21 ) successively recorded images of a predetermined test sector ( 10 ), trained and furnished. Machine of the food and beverage industry, in particular the tobacco processing industry and the pharmaceutical industry, with a device for optical testing of articles of the food and beverage industry, in particular the tobacco processing industry and the pharmaceutical industry, according to one of claims 1 to 8, during their conveying movement by means of a rotatable conveying means or a linear conveying means, on which the articles to be checked are arranged, and on the image sensors ( 1 . 11 . 21 ), the machine preferably comprises a display device ( 48 ), which is designed and set up by the image sensors ( 1 . 11 . 21 ) successively recorded images of a predetermined test sector ( 10 ) at the same time. Machine according to claim 9, characterized in that the machine comprises a plurality of conveyor drums ( 30 ), wherein the machine is at least partially designed as a filter application unit, as a multi-segment assembly unit and / or as a film winding unit and that the articles to be tested, in particular filter rods, Multi-segment articles, filter cigarettes ( 17 ), E-cigarettes, cigarillos or film wraps by means of a conveyor drum transversely with a small distance to the adjacently arranged OLED bulbs and image sensors ( 1 . 11 . 21 ) are moved past. Machine according to claim 9, characterized in that the machine comprises a Multisegmentstrangeinheit or Tabakstrangeinheit or Filterstrangeinheit, each having at least one linear conveyor, which is designed as a conveyor belt or format belt or suction conveyor or roller conveyor, wherein a to be examined wrapped strand of material, in particular multi-segment strand, tobacco rod or filter strand by means of the linear conveyor longitudinally axial with a small distance to the juxtaposed OLED bulbs and image sensors ( 1 . 11 . 21 ) is moved past. Machine according to claim 9, characterized in that the machine has at least one winding turret and / or folding turret and / or folding plate and / or a tongs and / or chamber belt, wherein the machine is designed as a packing machine and / or as a wrapping machine and that to be controlled Articles, in particular packs, containers or rods, and individually packaged articles, in particular transversely to their longitudinal extent by means of a winding turret or folding turret or folding plate or tongs or chamber belt or other conveying means transaxially with a small distance to the adjacently arranged OLED lamps and image sensors ( 1 . 11 . 21 ) are moved past.

Images