WO1990002937A1 - Controle de la finition de recipients - Google Patents

Controle de la finition de recipients Download PDF

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Publication number
WO1990002937A1
WO1990002937A1 PCT/US1989/003515 US8903515W WO9002937A1 WO 1990002937 A1 WO1990002937 A1 WO 1990002937A1 US 8903515 W US8903515 W US 8903515W WO 9002937 A1 WO9002937 A1 WO 9002937A1
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WO
WIPO (PCT)
Prior art keywords
image
container
array
selectively
camera
Prior art date
Application number
PCT/US1989/003515
Other languages
English (en)
Inventor
John W. Juvinall
Robert C. Redmond
Original Assignee
Owens-Illinois Glass Container Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Owens-Illinois Glass Container Inc. filed Critical Owens-Illinois Glass Container Inc.
Publication of WO1990002937A1 publication Critical patent/WO1990002937A1/fr
Priority to DK119090A priority Critical patent/DK119090A/da

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
    • G01N21/9054—Inspection of sealing surface and container finish

Definitions

  • the present invention is directed to optical imaging apparatus having particular utility for inspection of transparent containers, and more specifically to an apparatus and method for inspecting the finish of containers for commercial variations and geometric characteristics.
  • the term "container finish” generally refers to that portion of the container which defines the container mouth.
  • the finish includes that portion of the container neck having threads and/or shoulders for receiving the container cap, as well as the upper surface of the neck surrounding the container mouth against which the cap seats. It is important that the container finish be properly manufactured so that a cap may be affixed thereto to seal the container cavity against leakage and escape of carbonation during handling and storage.
  • United States Patent 4,701,612 assigned to the assignee hereof, discloses a method and apparatus for inspecting the finish of transparent containers, particularly glass containers, which include facility for directing diffused light energy laterally through the container finish as the container is rotated about its central axis.
  • a camera includes a plurality of light sensitive elements or pixels disposed in a linear array angulated with respect to the container axis and coplanar therewith to view the external and internal finishwall surfaces, the latter through the open container mouth. Individual elements of the camera linear array are sampled by an information processor at increments of container rotation, and corresponding data indicative of light intensity at each element is stored in an array memory as a combined function of element number and scan increment.
  • Such data is compared following completion of container rotation to standard data indicative of an acceptable container finish, and a reject signal is generated if such comparison exceeds an operator-adjustable threshold.
  • the method and apparatus so disclosed represent a significant advance inprevious finish inspection techniques and have enjoyed acceptance in the art, improvement remains desirable.
  • the method and apparatus so disclosed while highly effective in detecting horizontal variations in the container finish, are not as effective in detecting vertical and radial variations.
  • the disclosed apparatus cannot measure geometric characteristics of the container finish such as inside diameter, outside diameter or thread diameter.
  • U.S. Patent No. 4,492,476 discloses an optical inspection system for transparent containers in which an image of a test container is directed onto an array camera which includes a two-dimensional CCD image sensor. Sensor elements or pixels are scanned by column parallel to the container axis, and circuitry is responsive to detection of the image edges for identifying an inspection region containing the container image, and for processing image data for variation detection only within such inspection region. However, all image data must be scanned for identifying the inspection region. Furthermore,
  • SUBSTITUTESHEET image data processing is accomplished entirely at the processing circuitry.
  • the disclosed technique is more time consuming than desirable for inspecting containers in a mass production environment.
  • the disclosed system does not measure geometric characteristics of containers.
  • U.S. Patent No. 4,430,673 discloses an optical star tracker for spacecraft attitude control which employs a CCD image sensor and control electronics for scanning and selectively processing image data. In particular, only information from sensor pixels in an area of interest are subject to a/d conversion and processing, the remaining data being clocked from the sensor pixels but ignored. Again, all image data processing is carried out at the electronics.
  • Amoreparticular object of the invention is to provide a container finish inspection apparatus and method of the described character which address and overcome the aforementioned deficiencies in the art, which is adapted for detection of commercial variations of any orientation, and which
  • SUBSTITUTE SHEET are also capable of measuring geometric characteristics of the container finish.
  • a further object of the invention is to provide container finish inspection apparatus of the described character which is readily adjustable for inspection of containers having differing finish sizes.
  • apparatus of the type disclosed in above-referenced Patent No. 4,701,612 is characterized in that the camera comprises at least first and second arrays of light sensitive elements positioned with respect to the camera focusing elements on a common optical plane opposed to the diffused light source across the container finish so as to receive non- overlapping images of the container finish spaced from each other laterally of the container axis of rotation.
  • the information processor is coupled to each of the arrays for indicating optical characteristics of the container finish as differing functions of light intensity incident on the elements of each array.
  • the first and second arrays comprise matrix arrays which receive two- dimensional images of laterally opposite side portions of the container finish, and a linear third array of light sensitive elements is positioned so as to receive a one-dimensional image of the container finish positioned between the two-dimensional images and coplanar with the container axis.
  • At least three and preferably five linear arrays are formed and positioned with respect to the camera focusing elements for receiving respective parallel one-dimensional images of the container finish, one of which is coplanar with the container axis of rotation and the others of which are spaced in pairs on laterally opposed sides of such axis.
  • five separate linear a rays receive parallel one-dimensional images of the container finish through camera focusing elements which include mirrors coupled to servo motors for selectively positioning the one-dimensional images laterally of the container axis.
  • the camera comprises a unitary matrix array such as a CCD image sensor which receives a two-dimensional image of the entire container finish, and electronic processing circuitry coupled to the matrix array for selectively processing information from separate array elements and thereby functionally dividing the unitary matrix array into a plurality of parallel linear arrays spaced from each other laterally of the container axis.
  • a unitary matrix array such as a CCD image sensor which receives a two-dimensional image of the entire container finish
  • electronic processing circuitry coupled to the matrix array for selectively processing information from separate array elements and thereby functionally dividing the unitary matrix array into a plurality of parallel linear arrays spaced from each other laterally of the container axis.
  • a matrix array image sensor of generally conventional construction is coupled to scan control and data processing electronics for selectively reading image pixel data of interest, and for effectively ignoring other data. Furthermore, the scan control electronics interacts with the image sensor in such a way that at least some signal processing may be carried out at the sensor. The latter feature in particular reduces processing
  • BSTITUTE SHEET required at the data processing electronics and increases accuracy. Multiple scan control clocks are employed for rapidly clocking ignored data, while clocking data of interest at a slower rate compatible with the image data processing electronics.
  • FIG. 1 is a schematic diagram of apparatus for inspecting the finish of containers in accordance with the present invention
  • FIG. 2 is a schematic illustration of the container finish as viewed by the camera of FIG. 1, with camera field of view superimposed thereon, in accordance with a first embodiment of the invention
  • FIG. 3 is a fragmentary schematic diagram of a camera arrangement in accordance with a second embodiment of the invention.
  • FIG. 4 is a fragmentary schematic diagram of another camera arrangement in accordance with the present invention.
  • FIG. 5 is a view similar to that of FIG. 2 and showing the camera field of view in the embodiment of FIG. 4;
  • FIG. 6 is a fragmentary schematic illustration of the container finish as viewed by the camera in accordance with yet
  • FIG. 7 is a functional block diagram of scan control and data processing electronics employed in conjunction with the camera arrangement of FIG. 6.
  • a conveyor 20 typically including a starwheel (not shown) and a slide plate 21, is so disposed and connected to a source of molded containers as to bring successive containers 22 into position at a finish inspection station 24.
  • Conveyor 20 may be of any suitable type, such as those shown in United States Patent Nos.4,230,219 and 4,378,493, the disclosures of which are incorporated herein by reference, and would typically include a rotatable starwheel for bringing successive containers into position and holding the containers in fixed position during the scanning operation.
  • a bottle rotating device 26, such as a drive roller, is positioned to engage container 22 at station 24 and to rotate the container about its central axis 23.
  • An encoder 28 is coupled to the container rotation mechanism to provide signals indicative of increments of container rotation.
  • a detector 30, such as a limit switch, is positioned to provide a signal indicative of presence of container 22 at station 24.
  • container 22 is illustrated as a molded glass bottle having a container body 32 and a generally cylindrical neck 34 which projects upwardly from the body shoulder 37.
  • the finish portion of the container inspected in accordance with the present invention includes the upper portion of neck 34 which terminates in a cap sealing surface 36.
  • a helical thread 38 is integrally molded onto the outer surface of the finish wall which surrounds the container mouth, and a lip or shoulder 40 is likewise formed on the finish wall outer surface over which a cap skirt may be crimped in the usual manner for affixing the cap to the container.
  • the present invention is disclosed in conjunction with apparatus adapted to inspect that portion of the container finish to which the cap is to be affixed.
  • a light source 42 is positioned to direct diffused light energy onto the container finish from a direction generally lateral to container axis 23.
  • Light source 42 includes one or more lamps 44 and a diffuser plate 46.
  • a camera 48 is positioned on the side of axis 23 opposite to light source 42 to receive an image of the container finish through the camera lens 50.
  • An information processor 52 receives a signal from detector 30 indicative of presence of a container 22 at inspection station 24, and signals from encoder 28 indicative of increments of container rotation. Camera 48 is likewise coupled to information processor 52 for receiving scan control signals and providing signals indicative of the intensity of light incident on each camera element.
  • Information processor 52 is connected to an object array memory 54 and to a standard array memory 56, and has an output for providing a reject signal to container sorting apparatus (not shown).
  • Each array memory 54, 55 is an N x M array memory, where N is equal to or greater than the number of elements or pixels in camera 48 , and M is equal to or greater than the number of scan increments for one complete rotation of container 22.
  • inspection station 24 is similar to that illustrated inPatent No.4,701,612, the disclosure of which is incorporated herein by reference.
  • cameras 48 comprises three separate arrays 60, 62, 64 of light sensitive pixels or elements carried on a common support or substrate 66.
  • Arrays 60, 62 are two-dimensional or matrix arrays positioned on opposite lateral sides (with respect to the container axis) of the one-dimensional or linear element array 64.
  • Lens 50 focuses the fields of view of camera arrays 60-64 (or, conversely, focuses the image 22a of container 22 onto the camera arrays) in the manner illustrated in FIG. 2 so as to view diametrically opposite portions of the coaxial cylindrical container finish external and internal wall surfaces, the internal wall surface being viewed at an angle through the open container mouth.
  • matrix arrays 60, 62 extend from the central portion of the container finish laterally outwardly so as to overlie opposite side portions of the container finish.
  • Each array 60, 62- and 64 is individually connected to information processor 52 for selective control of array scanning by information processor 52, and for selective receipt and processing of signals indicative of light intensity received at the individual array elements.
  • Linear array 64 may comprise 512 elements having a composite linear or one-dimensional field of view which extends at least from the opposite edge of the finish sealing surface to the adjacent lower edge of shoulder 40.
  • Matrix arrays 60, 62 may comprise 128 x 256 element arrays. As previously indicated, and as described in greater detail in U.S. Patent No.
  • processing of signals from central linear array 64 and comparison of object array data in memory 54 to standard data in memory 56 is effective for detecting horizontally oriented checks or faults in the container finish.
  • vertical checks and radial checks in the container finish which are essentially coplanar with the one-dimensional image of array 64, are not as reliably detected.
  • geometric parameters of the container finish such as neck inside diameter and outside diameter, thread outside diameter, thread root diameter and thread contour, cannot be determined using array 64 alone.
  • all of such checks and parameters can be readily detected or measured by scanning matrix arrays 60, 62 at increments of container rotation, storing such information in object array memory 54 and then comparing such information to data stored in standard memory 56 following completion of a scan operation.
  • finish diametric characteristics are measured as a function of the number of elements in matrix arrays 60, 62 in each lateral row which receive the shadow or image of the container finish.
  • matrix arrays 60, 62 are positioned on substrate 66 so that the rows of each matrix are in lateral alignment and the columns
  • B TIT TE of each matrix are at predetermined separation from each other.
  • Resolution of variation detection and geometric parameter measurement depend upon, and may be correspondingly controlled as a function of , the number of and separation between elements in arrays 60-64 and the number of scan increments detected by encoder 28 per container revolution.
  • FIG. 3 illustrates a modified camera arrangement 48a which comprises a linear array camera 64a and separate matrix array cameras 62a, 66a, all of which are of conventional construction.
  • a central one-dimensional image of the finish of container 22 is received from lens 50 and focused onto array camera 64a by the lens relay 70.
  • the lateral two-dimensional images of the container finish are projected onto matrix cameras
  • FIG. 3 has the advantage as compared with the embodiment of FIG. 2 of using standard matrix and linear array cameras 62a-66a, and is thus more economical to implement.
  • FIG. 3 Another advantage of the embodiment of FIG. 3 (which may also be employed in the embodiment of FIGS. 1 and 2) is that the separate matrices may be connected to individual preprocessors for initially processing pixel information and then feeding the same to a central processor. In this way, measurement time and resolution may be increased significantly.
  • FIGS. 4 and 5 illustrate a second modified camera arrangement 48b (FIG. 4) and its corresponding field of view with respect to the container finish (FIG. 5).
  • camera 48b comprises five linear array cameras 80, 82, 84, 86 and 88 which receive corresponding respective parallel one-dimensional images of the finish of container 22 through primary lens 50, an arrangement 90 of folding mirrors and the respective secondary or relay lenses 92. That is, the one- dimensional image received by central camera 84 is fed directly from primary lens 50 through the aperture between mirrors 94 and corresponding relay lens 92 onto the camera array.
  • the images directed to intermediate cameras 82, 86 are folded by mirrors 94 and 96 through corresponding lenses 92 onto the camera arrays, while the one-dimensional images received by outside cameras 80, 88 are folded by mirrors 94 and mirrors 98 through lenses 92 onto the camera arrays.
  • the fields of view of cameras 80-88 with respect to the container finish image 22a are illustrated in FIG. 5.
  • the image at central array 84 is coplanar with the container finish axis, and thus corresponds to the image of linear array 64 in FIG. 2.
  • the images at arrays 80, 88 are received from the outside edges of the container finish.
  • the images at intermediate arrays 82, 86 are respectively positioned midway between outer array images 80, 88 and central image 84.
  • central array 84 is employed to detect horizontal variations in the manner previously discussed, intermediate arrays 82, 86 are employed to detect vertical variations, radial variations and LOF variations, and outer arrays 80, 88 are employed to determine geometric characteristics of the container finish.
  • each of the folding mirrors 96, 98 is carried on a corresponding mirror-mount which is individually coupled to a corresponding servo drive motor, illustrated collectively at 100.
  • Drive motors 100 receive drive control signals from information processor 52 (FIG. 1) for controlled adjustable positioning of mirrors 96, 98, and thereby adjustably positioning the fields of view of linear array cameras 80, 82, 86 and 88 with respect to the container finish image.
  • the array fields of view may be readily adjusted for container finishes of differing sizes or geometries.
  • at least some diametric characteristics of the container finishes may be determined as a function of position of the servo motors coupled to outside mirrors 98. Most preferably, mirrors 96, 98 move together to accommodate container wobble.
  • FIGS. 6 and 7 illustrate a presently preferred embodiment of the invention in which the camera 48c comprises a monolithic matrix array sensor 110, preferably a solid-state charge coupled device having on-board processing electronics.
  • sensor 110 comprises a Fairchild CCD222488 x 380 elementArea Image Sensor illustrated in a Product Data Sheet of the same title (1982) which is incorporated herein by reference.
  • Schematic representations and signal designations illustrated in FIGS. 6 and 7 of the present application correspond to those employed by that manufacturer. It will be appreciated, of course, by persons skilled in the art, that the invention is in no way limited to such specific sensor.
  • sensor 110 is illustrated in typical orientation recognized by persons in the art, and will be so discussed hereinafter, with the finish image 22a horizontal rather than vertical.
  • sensor 110 is rotated 90° clockwise from the orientation of FIG. 6 so that the "horizontal transport register” 116 (using conventional terminology) is oriented vertically (parallel to the vertical container axis), and the "vertical transport registers” 114 are oriented horizontally.
  • Image sensor 110 comprises a multiplicity of individual image sensing elements or pixels 112 disposed in rows lateral to the container finish axis. All sensing elements 112 of each row are connected to a corresponding analog transport register 114.
  • the several analog transport registers 114 are correspondingly connected to an analog transport register 116, which is connected through a gate 117 and an amplifier 118 to provide video output to information processor 52 (FIGS. 1 and 7).
  • Sensor 110 receives control signals from information processor 52. These control signals include clock signals Hi and H2 for controlling register 116, and clock signals VI and V2 for controlling registers 114 for odd and even fields.
  • a clock signal ⁇ BE provides bias to gate 117.
  • a clock signal 0-p gates pixels 112 onto transport registers 114, and a clock signal 0g is applied to the sample-and-hold control input of amplifier 118.
  • FIG. 7 is a functional block diagram of that portion of information processor 52 relating to control of camera 48c and receipt of data therefrom.
  • a dual port row pattern control RAM 122 has respective first sets of address and data ports connected by a bus 124 to a control microcomputer 126.
  • RAM 120 has a second data port D coupled through an a/d converter
  • the second address port A of RAM 120 receives an input from a counter 132.
  • Counter 132, and the read/write control input R/ and the enable input CE of RAM 120, are coupled to control logic 134.
  • the second data port D of RAM 122 is connected to the data input D of a row pattern latch 136.
  • a row counter 138 provides a counter output Q to the second address port A of RAM 122.
  • a read control PROM 140 having row and column read control information prestored therein, receives least significant address bit information ALS from the output Q of a pixel counter 142, and receives most significant address bit information AMS from the output of row pattern latch 136.
  • the output Q of PROM 140 is fed to a latch 144.
  • Amaster clock 146 provides input to latch 144, counter 142, latch 136 and a shift register 148.
  • the most significant address bit at output Q of PROM 140 provides an enable input EN to counter 138, a clear input to counter 142 and a D input to shift register 148.
  • the output QB of register 148 is fed to the enable input CE of RAM 122.
  • Latch 144 provides the usual clamp, sync and blank control inputs to video circuit 130, as well as an enable input to central logic 134.
  • Latch 144 also provides clock signals VI, V2 and 0p to sensor 110 through a buffer 150.
  • a horizontal toggle output HT of latch 144 is connected as an input to a pair of AND gates 152, 154.
  • Gate 152 receives a second input from clock 146, and provides complementary outputs through buffer 150 to the Hi and H2 clock inputs of sensor 110, signals Hi and H2 thus being the inverse or complement of each other.
  • Gate 154 receives a second input from clock 146 and an integrate clock control input from latch 144, and provides clock signal J-f- 3 -g to sensor 110 through buffer 150.
  • a gate 156 receives the integrate clock control output from latch 144, a second input from clock 146, and provides clock signal 0g to sensor 110 through buffer 150.
  • analog signals indicative of light intensities received at each of the image sensing elements 112 are fed to the corresponding analog transport register 114 under control of clock 0-p .
  • analog transport registers 114 are clocked by alternating fields onto register 116, and register 116 is clocked through gate 117 and amplifier 118 to the video processing electronics.
  • signals corresponding to intensity of light received at the various image sensing elements would be fed row-by-row to and through register 116 to the video electronics.
  • the various matrix scan control signals are selectively operated so as to highlight and transmit to image processor 52 only data from element rows or lines of interest - e.g. the five element lines corresponding to images 80-88 in FIG. 5 - while ignoring data indicative of other element lines.
  • Transport registers 114 are then again clocked so as to load into register 116 the image data corresponding to image 88a at the tenth line of pixels 112.
  • Transport register 116 is then clocked less rapidly - e.g., at 16 MHz - so as to download such image data through gate 117 and amplifier 118 to information processor 52 (FIG. 7) at a rate at which the data can be read and stored. This process is repeated for one- dimensional images 86a, 84a, 82a and 80a so that the five groups of image data are stored in information processor 52.
  • image scan time is significantly reduced as compared with scanning of the entire image.
  • scanning of images 80a-88a requires downloading of only one percent of the image data in a 512 x 512 matrix array, and requires only on the order of one millisecond of scanning time, as opposed to a normal frame of time 33.3 milliseconds.
  • uch working embodiment of the invention comprises a Fairchild CCD 3000 video camera with control logic modified as hereinabove described.
  • the amount of data read and stored is significantly reduced as compared with reading and analyzing all video data at array sensor 110.
  • a particularly significant feature of the embodiment of FIG. 6 lies in the fact that the signal-to-noise ratio of any of the five images 80a-88a may be significantly enhanced, with a corresponding decrease in resolution, by summing image information from a number of element lines within transport register 116 prior to downloading to information processor 52.
  • image 84a may be obtained by integrating or summing image data from several element lines on either side of the line at the geometric center of the container finish image. This gives high sensitivity to horizontal commercial variations. This may be accomplished on sensor 110 by simply successively clocking such data onto transport register 116, which inherently integrates such data. The number of columns integrated must be less than the minimum size of the checks to be detected.
  • This procedure need not be employed in processing outer images 80a, 88a, which are essentially responsive to the white/black edge of the container finish image or shadow.
  • This feature of the invention thus employs or takes advantage of the inherent capability of sensor 110 to perform such integration as described while increasing signal-to-noise ratio. For example, integration of sixteen lines at sensor 110 provides four times the signal-to-noise ratio (assuming Gaussian noise) as would be the case if the integration were performed within information processor 52 (in addition to requiring less time both to obtain the data from the array and to perform the integration in processor 52). Similar integration may be performed at gate 117 to enhance vertical checks. This same procedure may be employed in obtaining intermediate images 82a and 86a.
  • real time selective scanning control in the manner described, in which a portion of the information processing is actually performed at the sensor, increases both accuracy and efficiency of information processing.
  • row pattern information - e.g. , row or line information to be rapidly clocked and ignored and row information to be integrated, both as described above - is prestored in PROM 140.
  • This prestored pattern information is accessed by tracking the pixel lines (at counter 142) and row pattern data (at RAM 122). Note that such pattern information may be changed by computer 126. For example, if the tenth line of pixels fails to show an edge in the example discussed above, microcomputer 126 can command reading of the ninth or eleventh line.
  • the most significant bit at output Q of row pattern PROM 140 indicates end of a line or row at sensor 110, and clears pixel counter 142, enables incrementing of row counter 138, and functions through a delay at shift register 148 to access the row pattern information at RAM 122 for the next row.
  • row pattern number RAM 122 corresponding to images 80a-88a. Further, row pattern number RAM 122 is commanded to integrate eight adjacent lines or rows of pixel data (at sensor 110) for images 84a, and to integrate eight adjacent pixels (column integration) at images 82a and 86a. No integration is performed for images 80a and 88a. If data at image 88a is read and a finish edge (thread) is detected, the pointer for image 88a is decremented; if no edge is detected, the pointer for image 88a is incremented.
  • Thread OD is proportional to the difference between the pointers for images 80a and 88a.
  • the pointers for images 82a, 84a and 86a are set at 25%, 50% and 75% of such difference respectively.
  • Row pattern RAM 122 is then updated to reflect new pointers.
  • FIGS. 6 and 7 thus comprises a high speed computer-controlled camera in which all of the following may be readily controlled in real time: horizontal resolution, vertical resolution, pixel sensitivity, pixel size, pixel data to be read from the array, pixel data to be loaded into the computer for further processing and analysis, and frame time. The first six of these parameters may be controlled on a pixel-b -pixel basi . It will also be appreciated that computer-controlled camera arrangement of FIGS. 6 and 7 is not limited to five scan lines 80a-88a, or to reading of a full data line. Portions of a data line would be clocked at high speed and ignored. Indeed, horizontal and vertical data could be integrated simultaneously to simulate an array of any smaller size. For example, the preferred 488 x 380 array would be integrated vertically by eight and horizontally by four to produce an apparent 61 x 95 array in which each pixel would be thirty-two (8 4) times more sensitive.
  • one line or a few lines near the threads could remain unintegrated (high resolution), and one or more lines on each side could be integrated several times. This technique would yield information over a wider range, but with reduced data amount, if the threads move out of the high resolution area. Data lines of interest could be incremented in each frame to produce a two-dimensional image of thread contour.
  • the camera system of FIGS. 6-7 is not in any way limited to inspection of container finishes specifically. Indeed, it is envisioned that the camera system of FIGS. 6-7 could be readily employed to inspect other container sections, such as container sidewalls and bases, to inspection of container caps, and to inspection of other diverse items such as nuts and bolts, etc.

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Abstract

Un appareil permet de contrôler la finition d'un récipient (22) tandis que ce dernier est tenu et mis en rotation autour de son axe central (23). Une source lumineuse (42) est positionnée pour diriger sur la finition du récipient une énergie lumineuse diffusée, et une caméra (48) est positionnée de l'autre côté de l'axe du récipient par rapport à la source lumineuse. La caméra comporte de multiples réseaux (80, 82, 84, 86, 88) d'éléments photosensibles positionnés, par rapport aux éléments de focalisation de la caméra, sur un plan optique commun opposé à la source de lumière pour recevoir des images non superposées de la finition du récipient, espacées les unes des autres latéralement par rapport à l'axe du récipient. Des circuits électroniques de traitement de l'information (52) sont couplés aux réseaux de la caméra pour indiquer les caractéristiques optiques de la finition du récipient sous forme de fonctions différentielles de l'intensité lumineuse incidente sur les éléments de chaque réseau. Dans les diverses formes d'exécution décrites de l'invention, les réseaux comprennent un ou plusieurs réseaux linéaires ou matriciels pour recevoir des images non superposées de la finition du récipient, selon une orientation présélectionnée les unes par rapport aux autres, afin de détecter des variations structurales commerciales et/ou des paramètres géométriques de la finition du récipient.
PCT/US1989/003515 1988-09-16 1989-08-16 Controle de la finition de recipients WO1990002937A1 (fr)

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DK119090A DK119090A (da) 1988-09-16 1990-05-14 Apparat og fremgangsmaade til kontrol af beholdere

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US24523688A 1988-09-16 1988-09-16
US245,236 1988-09-16

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WO1990002937A1 true WO1990002937A1 (fr) 1990-03-22

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EP (1) EP0438417A4 (fr)
JP (1) JPH03500092A (fr)
AU (1) AU613516B2 (fr)
CA (1) CA1315390C (fr)
DK (1) DK119090A (fr)
PH (1) PH26987A (fr)
WO (1) WO1990002937A1 (fr)
ZA (1) ZA896602B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2247750A (en) * 1990-07-13 1992-03-11 Hajime Industries Transparent container inspection system
EP0657732A1 (fr) * 1993-12-06 1995-06-14 Elpatronic Ag Méthode et appareil d'inspection optique d'une zone transparente d'un récipient, notamment le goulot
EP0698776A3 (fr) * 1994-08-25 1997-05-21 Owens Brockway Glass Container Inspection optique de paramètres dimensionnels d'un réceptacle
WO2000039568A1 (fr) * 1998-12-28 2000-07-06 Applied Vision Corp. Systeme de vision artificielle et procede d'inspection de recipients sans contact
EP1148352A2 (fr) * 2000-04-22 2001-10-24 Leuze electronic GmbH + Co. Capteur optique
US6903814B1 (en) 2003-03-05 2005-06-07 Owens-Brockway Glass Container Inc. Container sealing surface inspection
WO2012027869A1 (fr) * 2010-08-31 2012-03-08 崇州君健塑胶有限公司 Procédé de détection de qualité en ligne pour assemblage de fermeture

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0456910A1 (fr) * 1990-05-14 1991-11-21 Owens-Brockway Glass Container Inc. Epreuve de l'orifice des réceptacles
AU2002344113A1 (en) * 2002-10-18 2004-05-04 Kirin Techno-System Corporation Glass bottle mouth part inspection device
JP5687318B2 (ja) * 2013-08-13 2015-03-18 東洋ガラス株式会社 合目段差測定装置、および合目段差測定方法

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GB2247750A (en) * 1990-07-13 1992-03-11 Hajime Industries Transparent container inspection system
EP0657732A1 (fr) * 1993-12-06 1995-06-14 Elpatronic Ag Méthode et appareil d'inspection optique d'une zone transparente d'un récipient, notamment le goulot
US5661294A (en) * 1993-12-06 1997-08-26 Elpatronic Ag Process and apparatus for the optical inspection of a transparent region of a container, in particular the mouth region
EP0698776A3 (fr) * 1994-08-25 1997-05-21 Owens Brockway Glass Container Inspection optique de paramètres dimensionnels d'un réceptacle
WO2000039568A1 (fr) * 1998-12-28 2000-07-06 Applied Vision Corp. Systeme de vision artificielle et procede d'inspection de recipients sans contact
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US6903814B1 (en) 2003-03-05 2005-06-07 Owens-Brockway Glass Container Inc. Container sealing surface inspection
WO2012027869A1 (fr) * 2010-08-31 2012-03-08 崇州君健塑胶有限公司 Procédé de détection de qualité en ligne pour assemblage de fermeture

Also Published As

Publication number Publication date
ZA896602B (en) 1990-05-30
DK119090D0 (da) 1990-05-14
DK119090A (da) 1990-05-14
AU613516B2 (en) 1991-08-01
EP0438417A4 (en) 1991-10-30
EP0438417A1 (fr) 1991-07-31
CA1315390C (fr) 1993-03-30
AU4069489A (en) 1990-04-02
PH26987A (en) 1992-12-28
JPH03500092A (ja) 1991-01-10

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