JP5635963B2 - Beverage liquid foreign substance inspection apparatus and beverage liquid foreign substance inspection method - Google Patents

Description

  The present invention relates to a beverage liquid foreign substance inspection apparatus and a beverage liquid foreign substance inspection method for detecting foreign substances in a beverage liquid filled in a bottle to be inspected.

  Conventionally, in an inspection apparatus that detects foreign matter in a beverage filled in a bottle, for example, by tilting or rotating the bottle to be inspected, the foreign matter is suspended in the beverage and the foreign matter is in the beverage. An image of floating is captured by a camera, and the captured image is processed to detect foreign matter (see Patent Document 1, Patent Document 2, etc.).

  Here, when the beverage is a dark beverage such as red wine or the bottle is colored, it may be difficult to detect foreign matters floating in the beverage liquid in the bottle. Therefore, for example, in Patent Document 2, when highly irradiating infrared light illumination is provided for a dark beverage or bottle, and illumination light (infrared light) from the illumination passes through the bottle to be inspected. It is described that a foreign object is detected by capturing a shadow of the image with a camera.

JP-A-9-54047 JP 2005-17004 A

  By the way, there are various types of beverages, for example wine, and there are brands. And the transmittance | permeability of infrared light differs for every kind and brand. Further, the length of illumination light (infrared light) passing through the beverage also varies depending on the shape and size of the bottle and the imaging position (bottleneck portion, bottle body portion, etc.). Therefore, when detecting foreign matter using the transmitted light of the illumination provided behind the bottle to be inspected, it is important to adjust the brightness of the illumination according to the type of beverage or bottle, the imaging position, etc. . That is, if the back lighting is dark, the light transmitted through the bottle and the beverage becomes weak, and it becomes difficult to capture the shadow of the foreign object with the camera. The same applies if the illumination behind is too bright. Therefore, if the brightness of the background illumination is not properly adjusted, the foreign object detection accuracy is lowered.

  In addition, when a beverage liquid foreign matter inspection apparatus having such illumination is used for foreign matter inspection of bottled beverages produced in a variety of small quantities, each type of beverage or bottle (variety) and each imaging device used for imaging Since it is necessary to adjust the brightness of the illumination, the trouble of the adjustment becomes a problem. In other words, if the brightness of the illumination is adjusted for each type of beverage or bottle and the image pickup device, the adjustment work will reduce the overall efficiency of foreign object inspection.

  Accordingly, an object of the present invention is to appropriately and efficiently adjust the brightness of illumination used for foreign matter inspection of beverage liquid according to the bottle to be inspected, the type of beverage, and the color density. An object of the present invention is to provide a beverage liquid foreign matter inspection apparatus and a beverage liquid foreign matter inspection method.

The apparatus for inspecting a foreign substance of a beverage according to the present invention includes an illumination provided behind a bottle to be inspected filled with a beverage and a shadow of the bottle to be inspected obtained by transmitting illumination light of the illumination through the bottle to be inspected. An image pickup device that picks up a shadow image, an image processing device that detects a foreign substance in the beverage by performing image processing on the picked-up shadow image of the bottle to be inspected, and a control device. A plurality of the imaging devices are provided, and each of the imaging devices images different parts of the bottle to be inspected, and the illumination is one by one corresponding to each of the plurality of imaging devices. , Provided at a position opposite to the imaging device across the bottle to be inspected, and the control device images the illuminance measurement values on the respective light receiving surfaces of the plurality of imaging devices. Calculated using pixel data of a shadow image of the bottle to be inspected, and the calculated illuminance measurement value on each light receiving surface of the plurality of imaging devices is the type of beverage liquid filled in the bottle to be inspected. Correspondingly, the brightness of each of the plurality of lights is individually set so as to be included in an illuminance range defined with respect to a predetermined illuminance reference value.

  In such a beverage inspection apparatus, the brightness of each of the plurality of illuminations corresponds to the brightness of the transmitted light when the illumination light emitted from the illumination passes through the bottle to be inspected. The measured value of the brightness of the transmitted light corresponds to the illuminance on the light receiving surface of the imaging device. Therefore, if the brightness of the corresponding illumination is set so that the illuminance measurement value on the light receiving surface of each imaging device is included in the predetermined illuminance range, the brightness of the illumination is determined by the bottle to be inspected and the inspected It becomes appropriate according to the type and color density of the beverage liquid filled in the bottle. In addition, as described in detail in an embodiment to be described later, the burden on the worker required at this time is, for example, the input of the product number of the bottle to be inspected and the sliding of the knob for controlling the brightness of the illumination as appropriate. Just do it.

  ADVANTAGE OF THE INVENTION According to this invention, the drink liquid which can adjust the brightness of the illumination used for the foreign material test | inspection of a drink liquid appropriately and efficiently according to the bottle to be examined, the kind and color density of a drink A foreign matter inspection apparatus and a beverage liquid foreign matter inspection method are provided.

The figure which showed typically the example of the structure of the drink liquid foreign material inspection apparatus which concerns on embodiment of this invention. The figure which showed the example of the procedure of the drink liquid foreign material inspection which concerns on embodiment of this invention. The figure which showed the example of the image processing procedure for the foreign material detection in the drink liquid foreign material inspection apparatus which concerns on embodiment of this invention. The figure which showed the example of the illumination intensity adjustment screen of the camera displayed on a display apparatus. The figure which showed the example of the processing flow of the illumination intensity adjustment process performed by a central processing unit. The figure which showed the example of the illumination intensity adjustment setting table (a) and the appropriate illumination intensity table (b).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram schematically showing an example of the configuration of a beverage foreign matter inspection apparatus according to an embodiment of the present invention. As shown in FIG. 1, the beverage foreign matter inspection device 10 includes an inspected bottle rotating mechanism unit 20, an inspected bottle tilting mechanism unit 30, a camera 40 as an imaging device, a control device 50, and the like housed in a housing (not shown). Configured. Further, a display device 60, a numeric keyboard 61, a mouse 62, and the like connected to the control device 50 are provided outside the housing.

  Here, the bottle rotation mechanism 20 to be inspected includes a floor member 21, left and right side wall members 22a and 22b, a ceiling member 23, a rear wall member 24, and the like as structural members. These structural members are made of, for example, a flat metal plate such as a steel plate, but are flat plate structures formed by firmly joining metal flat bar members by welding or screwing. There may be.

  As shown in FIG. 1, the flat floor member 21 is disposed in a housing (not shown) of the beverage foreign matter inspection apparatus 10 so that the flat plate surface is substantially horizontal. Side wall members 22 a and 22 b and a rear wall member 24 are firmly attached to the upper part of the peripheral edge so as to be substantially perpendicular to the flat plate surface of the floor member 21. Further, the floor member 21 is provided with a rotating pedestal 25 on which the bottle 71 to be inspected is placed in an upright state, and the rotating pedestal 25 is rotationally driven by a motor 26. At this time, the rotation axis of the rotating pedestal 25 is substantially perpendicular to the flat surface of the floor member 21 and substantially coincides with the central axis of the bottle 71 to be inspected upright placed on the rotating pedestal 25. To do.

  A camera 40 is disposed on each of the plurality of shelves disposed at a plurality of (for example, two) height positions of the right side wall member 22a, and the left side wall facing the camera 40 is also provided. An illumination 41 is disposed on the member 22b. At this time, the imaging optical axis of the camera 40 intersects the central axis of the bottle 71 to be in an upright state substantially perpendicularly, and the illumination 41 is arranged on the opposite side of the bottle 71 to be tested on the imaging optical axis. It shall be installed. Therefore, when there is a foreign object that shields the illumination light from the illumination 41 in the beverage liquid of the bottle 71 to be inspected, the camera 40 can capture a shadow image of the foreign object. In addition, it is assumed that each of the plurality of cameras 40 images different portions of the bottle 71 to be inspected.

  In the present embodiment, it is assumed that the brightness intensity of each illumination 41 can be freely adjusted by a power supply voltage supplied from the illumination power supply 42.

  Further, an air cylinder 27 is attached to the left side wall member 22b, and the air cylinder 27 is cantilevered at the upper end of the ceiling support member 28 by driving the ceiling support member 28 up and down. The ceiling member 23 is moved up and down. At this time, the ceiling member 23 is attached to the upper end of the ceiling support member 28 so as to be substantially parallel to the flat plate surface of the floor member 21.

  In addition, a columnar pressing member 29 is disposed so as to hang down from the ceiling member 23 at a position of the ceiling member 23 substantially immediately above the position where the rotary base 25 of the floor member 21 is disposed. The columnar pressing member 29 is driven up and down by the air cylinder 27 via the ceiling support member 28 and the ceiling member 23, and when moved downward, the top of the bottle 71 to be inspected placed on the rotating base 25, That is, the upper surface portion of the cap 71a is pressed.

  The columnar pressing member 29 is rotatably attached to the ceiling member 23. Therefore, when the rotating base 25 is driven by the motor 26 and rotates, the bottle 71 to be inspected placed on the rotating base 25 also rotates, and the columnar pressing member 29 that presses the top of the bottle 71 to be inspected. Will also rotate.

  In FIG. 1, a bottle tilting mechanism 30 to be inspected is a mechanism member (not shown) that supports and tilts the tilt driving device 31 including a compressor or an air cylinder (not shown) and the entire bottle rotating mechanism 20 to be tested. ). An example of supporting and tilting the entire bottle rotation mechanism 20 to be inspected will be separately described with reference to FIG. 2, but the detailed structure of the mechanism member will be omitted including illustration.

  In FIG. 1, the control device 50 includes a central processing unit 51, a storage device 52, a device control sequencer 53, an image processing device 54, and the like. Here, the device control sequencer 53 generates and outputs a signal for controlling operations of the motor 26, the air cylinder 27, the tilt driving device 31, the camera 40, and the like in accordance with instructions from the central processing unit 51. Moreover, the image processing apparatus 54 acquires the captured image imaged with the camera 40, processes the acquired captured image, and detects the shadow image of the foreign material in a beverage. An example of image processing for detecting the shadow image of the foreign matter will be separately described with reference to FIG.

  Further, the central processing unit 51 and the storage device 52 correspond to, for example, a CPU (Central Processing Unit) and a storage device (semiconductor memory, hard disk device, etc.) of a personal computer. The process is controlled and the operator's operation is supported. At this time, the display device 60, the numeric keyboard 61, and the mouse 62 are used as input / output devices for workers. For example, the display device 60 displays various operation instruction information for the worker, and also displays a captured image of a foreign substance in the beverage liquid imaged by the camera 40, an inspection result, and the like.

  FIG. 2 is a diagram showing an example of a procedure for inspecting a beverage liquid foreign material according to an embodiment of the present invention. In FIG. 2, the procedure for inspecting the beverage foreign matter is indicated by the movement of the inspected bottle rotating mechanism 20 and is performed in the order of (S1) to (S6).

  First, in the initial state (step S <b> 1), the inspected bottle rotating mechanism unit 20 is held substantially horizontally by the inspected bottle tilting mechanism unit 30. At this time, the bottle 71 to be inspected is not placed on the rotating pedestal 25, and the columnar pressing member 29 is pulled up by the air cylinder 27.

  Subsequently, the inspection bottle 71 is set (step S2). That is, when the bottle 71 to be inspected is placed on the rotating base 25 in an upright state, the control device 50 drives the air cylinder 27 to move the ceiling support member 28 downward, thereby moving the columnar pressing member 29 downward. The head is lowered and the top of the bottle 71 to be inspected is pressed by the lower surface of the columnar pressing member 29.

  In the present embodiment, it is assumed that a concave portion (not shown) is provided on the upper surface of the rotary pedestal 25, and the surface portion is covered with a material that is difficult to slip, such as a soft rubber material. And if the to-be-inspected bottle 71 is mounted in the recessed part of the rotation pedestal 25, the center line of the bottle 71 to be in an upright state is made to substantially coincide with the rotation center line of the rotation pedestal 25. Yes. Further, a sensor for detecting that the bottle 71 to be inspected is placed may be provided on the upper surface of the rotary base 25.

  Moreover, in order to respond | correspond to the magnitude | size and shape of various bottle 71 to be inspected, the rotation base 25 shall be removable. Then, it is assumed that a plurality of rotary pedestals 25 having different sizes of recesses provided on the upper surface are prepared in advance.

  On the other hand, the lower surface of the columnar pressing member 29 is a flat surface, and the surface thereof is covered with a material that is elastic and not slippery, such as a soft rubber material. This presses the top of the bottle 71 to be inspected (the upper surface of the cap 71a), and when the bottle 71 to be inspected is held by the rotating base 25 and the columnar pressing member 29, the holding force is increased and the bottle to be inspected is increased. This is intended to prevent the 71 cap 71a from being damaged.

  Here, the columnar pressing member 29 may be provided with a pressure sensor for detecting the pressing force. In that case, the control device 50 can apply an appropriate pressing force to the columnar pressing member 29 via the air cylinder 27. The columnar pressing member 29 is also detachable from the ceiling member 23 in order to correspond to various sizes and shapes of the bottles 71 to be inspected, and a plurality of columnar pressing members 29 having different lengths are previously provided. It shall be prepared.

  Subsequently, the inspected bottle 71 is inclined by a predetermined rotation angle (inclination angle) θ around the rotation axis 33, and a transmission image of the inspected bottle 71 by the illumination light of the illumination 41 is captured (step). S3). In other words, the bottle 71 to be inspected is rotated and inclined together with the bottle rotation mechanism 20 to be inspected by the inclination driving device 31 while being held between the rotating base 25 and the columnar pressing member 29. The rotation angle (inclination angle) θ at this time is about 130 to 180 degrees, and the inspected bottle 71 is inclined until it is almost in an inverted state.

  In this way, when the inspected bottle 71 is tilted until it is close to an inverted state, the heavy foreign matter that has sunk in the bottom of the inspected bottle 71 is forcibly lifted up, so the inspected bottle In the beverage liquid of 71, it sinks downward. As a result, a state in which heavy foreign matter is floating in the beverage can be obtained. Here, the heavy foreign matter is a foreign matter having a sufficiently large specific gravity as compared with the specific gravity of the beverage liquid filled in the bottle 71 to be inspected.

  It should be noted that a foreign matter having a specific gravity that is sufficiently smaller than the specific gravity of the beverage such as a cork piece floats upward in the beverage when the bottle 71 to be inspected is inclined until it is nearly inverted. Therefore, it can be said that the behavior of this kind of foreign matter in the beverage is similar to that of a heavy foreign matter (with different directions). In the following, this type of foreign matter is treated as a kind of heavy foreign matter.

  Furthermore, in step S3, the control device 50 turns on the illumination 41 when the inspected bottle 71 is inclined by the inclination angle θ (it may be turned on in step S2), and is in a state of being inclined by the illumination light. For example, the transmission image of the bottle 71 to be inspected is continuously captured by the camera 40 every 0.25 seconds, and a plurality of captured images are acquired.

  Here, when a heavy foreign matter exists in the beverage, a state in which the heavy foreign matter settles in the beverage is captured in the plurality of continuously captured images. Therefore, the image processing device 54 of the control device 50 performs foreign object detection by performing predetermined image processing on the plurality of acquired captured images. An example of the foreign object detection process will be described in detail separately with reference to FIG.

  By the way, since the foreign matter in the beverage will block the illumination light of the illumination 41, in the captured image of the transmission image of the bottle 71 to be inspected, the foreign matter is picked up as a shadow image of a dark spot or dark region. When the illumination 41 is visible light and the beverage is, for example, a colored beverage such as red wine, it is difficult to distinguish the dark spot or dark region of the foreign matter. Therefore, in this embodiment, infrared illumination is used as the illumination 41 and an infrared camera is used as the camera 40. Infrared rays are highly permeable to colored beverages such as red wine, so that a dark spot or dark region caused by a foreign object can be accurately imaged.

  Subsequently, the inspected bottle 71 is returned to the upright state (step S4). That is, the control device 50 causes the tilt driving device 31 to rotate the entire bottle rotation mechanism section 20 to be rotated in the direction opposite to the previous direction by the rotation angle θ to return to the original horizontal state.

  Subsequently, the inspected bottle 71 is rotated (step S5). That is, the control device 50 drives the motor 26 to rotate the rotating base 25 at a predetermined rotational speed (for example, 400 to 500 rpm) for a predetermined time (for example, 5 seconds), and to stand upright on the rotating base 25. The bottle 71 to be inspected placed in a state is rotated. By the rotation of the bottle 71 to be inspected, the beverage liquid therein is also rotated, and by the rotation, the light foreign matter sinking to the bottom is rolled up and floats in the beverage liquid. In addition, the light foreign material here is a foreign material which has a specific gravity of the same degree as the specific gravity of the beverage liquid with which the to-be-inspected bottle 71 is filled, or a specific gravity a little larger.

  Subsequently, the bottle 71 to be inspected is stopped from rotating and imaged (step S6). That is, the control device 50 drives the motor 26 to rotate the rotating base 25, that is, the bottle 71 to be inspected. When the predetermined time (for example, 5 seconds) elapses, the control device 50 stops the rotation and stops. A transmission image of the illumination light of the bottle 41 to be inspected immediately after the illumination light is continuously shot by the camera 40 every 0.25 seconds, for example, and a plurality of continuously shot images are acquired.

  At this time, the beverage liquid in the bottle 71 to be inspected is still rotating, and therefore, the light foreign matter floating in the beverage liquid is also rotating in the same manner. Therefore, the floating light foreign matter is imaged as a moving dark spot or dark region in a plurality of continuously captured images. Note that the process for detecting a foreign object in a continuously captured image is the same as the process for detecting a heavy foreign object, and details will be described separately with reference to FIG.

  FIG. 3 is a diagram showing an example of an image processing procedure for detecting foreign matter in the beverage foreign matter inspection apparatus 10 according to the embodiment of the present invention. The image processing for detecting these foreign substances is performed independently when a transmission image by the illumination light of the illumination 41 of the bottle 71 to be inspected is captured at step S3 and step S6 shown in FIG. The processing contents are the same.

  In the present embodiment, when capturing a transmission image by illumination light of the illumination 41 of the bottle 71 to be inspected, the camera 40 continuously shoots the transmission image for 5 seconds at intervals of 0.25 seconds, for example. Then, since 20 captured images are obtained, the control device 50 processes the 20 captured images and detects a foreign substance in the beverage from the processed images. In FIG. 3A, only the first three captured images are shown. In FIG. 3, Δ represents a time interval (for example, 0.25 seconds) for continuous shooting.

  As shown in FIG. 3 (a), in the captured image captured by the camera 40, in addition to foreign matter in the beverage, bubbles of the beverage, the outline of the bottle, a label attached to the bottle, and the like are imaged. The In the captured image, the foreign object is imaged as a dark region having a certain size, and the bubble is imaged as a single or double thin contour line at the contour portion.

  Therefore, the image processing apparatus 54 first erases the thin outline of the bubble by the bubble outline erasing process which is a kind of blurring process. As a result, as shown in FIG. 3B, the bubbles are erased from the captured image. Next, the image processing device 54 performs binarization processing using the image after the bubble outline erasing processing. As shown in FIG. 3C, the binarization process is a process for clarifying black and white, and thus, for example, thin stains (not shown) attached to the bottle are erased, but the foreign matter is removed. , Displayed as a clear black area.

  Next, the image processing device 54 performs difference processing on the two binarized images. In the difference processing, as shown in FIG. 3D, the binarized image obtained at the first time t = t0 and the binarized image obtained at the subsequent time t = t0 + iΔ Find the difference image. At this time, in the difference image, the image portion that matches the both is deleted, and only the different image portion is left. Accordingly, the outline of the bottle, the label, and the like are erased, and dark stains and the like of the bottle remaining without being erased by the binarization process are also erased.

  On the other hand, in the captured image acquired when the bottle 71 to be inspected is tilted to an inverted level in step S3, heavy foreign matter in the beverage is imaged as an object that gradually sinks in the beverage. Since each of the captured images captured at this time has a different imaging time by a time interval Δ, the positions of the foreign objects are also different. Accordingly, in the image after the difference processing, the foreign matter is displayed as a black region having a certain size as shown in FIG.

  Similarly, in a captured image acquired immediately after the bottle 71 to be inspected is rotated in step S6, a light foreign object is captured as an object that floats in the beverage and rotates. Accordingly, in this case as well, since the foreign matter is not stationary, the foreign matter is displayed as a black region having a certain size as shown in FIG.

  As described above, in the beverage liquid foreign matter inspection apparatus 10, for a heavy foreign matter and a light foreign matter, a black region representing the foreign matter is an image after differential processing obtained from a plurality of continuously captured images. Therefore, the control device 50 of the beverage foreign matter inspection apparatus 10 can accurately detect foreign matter in the beverage.

  Next, with reference to FIGS. 4 to 6 in addition to FIG. 1, the illuminance adjustment on the light receiving surface of the camera 40 for adjusting the brightness of the illumination 41 will be described. 4 shows an example of the illuminance adjustment screen of the camera 40 displayed on the display device 60, and FIG. 5 shows an example of the processing flow of the illuminance adjustment process performed by the central processing unit 51. 6 and 6 are diagrams showing examples of the illuminance adjustment setting table (a) and the appropriate illuminance table (b).

  Incidentally, in the present embodiment, as described above, the illumination 41 is, for example, infrared illumination, and the camera 40 is, for example, an infrared camera. Further, a transmission image of one bottle 71 to be inspected is divided into a plurality of parts by a plurality of (for example, two) cameras 40, and each of the plurality of cameras 40 has one illumination 41 corresponding thereto. Each is provided at an opposing position with the bottle 71 to be inspected in between. Therefore, in this embodiment, according to the shape of the portion of the bottle 71 to be inspected, that is, according to the length of the illumination light from the illumination 41 passing through the beverage liquid of the bottle 71 to be inspected. The brightness can be adjusted.

  For example, since the upper portion of the bottle 71 to be inspected is a portion connected to a so-called bottleneck, the length of illumination light traveling from the illumination 41 toward the camera 40 through the beverage is short, and the lower portion of the bottle 71 to be inspected is the bottle. Therefore, the length of illumination light passing through the beverage is long. Therefore, if the brightness intensities of the plurality of lights 41 are all the same, when viewed from the camera 40 side, the transmitted light of the bottle neck portion of the bottle 71 to be inspected is bright and the transmitted light of the body portion is darker than that. Become. In general, when the transmitted light becomes too dark, the foreign matter detection accuracy decreases.

  Therefore, in the present embodiment, the brightness (hereinafter referred to as illuminance) of the transmitted light on the light receiving surfaces of the cameras 40 is substantially the same among the plurality of cameras 40 and is suitable for capturing the shadow of the foreign matter. The brightness of the illumination 41 corresponding to each of the cameras 40 is adjusted so as to be a large value. For example, by setting the brightness of the illumination 41 that illuminates the upper part of the bottle 71 to be inspected to be relatively weaker than the brightness of the illumination 41 that illuminates the lower part, the illuminance on the light receiving surfaces of the two cameras is determined in advance. Approximately match the illuminance.

  It should be noted that the appropriate illuminance here is obtained in advance through experiments or the like. For example, using each captured image obtained when the illuminance is changed little by little, the illuminance when the foreign object can be detected with higher accuracy by the image processing shown in FIG. 3 is set to an appropriate illuminance. . In the experiment, parameters used in image processing such as binarization processing are also obtained as appropriate image processing parameter values for capturing the shadow of the foreign matter.

  Then, the appropriate illuminance on the light receiving surface of the camera 40 thus obtained and the value of the appropriate image processing parameter are classified according to the color density of the beverage used in the experiment, and the classified color density and the appropriate A table (hereinafter referred to as an appropriate illuminance table) in which illuminance (hereinafter referred to as appropriate illuminance) is associated with an appropriate image processing parameter (hereinafter referred to as appropriate image processing parameter) is stored in the storage device 52. It is assumed that the color density is a value defined by an attenuation rate when the illumination light of the illumination 41 passes through the beverage. The appropriate illuminance table is shown in FIG.

  The illuminance adjustment screen 65 in FIG. 4 is a screen that is displayed on the display device 60 before the foreign matter inspection is actually performed using the beverage liquid foreign matter inspection device 10 in FIG. 1. Adjustment of the illuminance on the light receiving surface, that is, adjustment of the brightness of the illumination 41 is performed.

  The illuminance adjustment screen 65 is provided with a picked-up image display area 651 that is a screen area for displaying a picked-up image of the transmitted light of the bottle 71 to be inspected picked up by the camera 40. An area 653, an illuminance adjustment area 654, an illuminance reference value display area 655, an illuminance measurement target area data display area 656, and the like are provided.

  Here, in the type selection area 652, an input box for inputting the type number of the beverage subject to illuminance adjustment is displayed, and the operator can input the type number of the beverage subject to illuminance adjustment via this input box. it can. The camera selection area 653 displays a radio button for selecting the illuminance adjustment target camera 40, and the operator can select the illuminance adjustment target camera 40 by selecting one of the radio buttons. it can. In FIG. 4, the camera # 2 is selected, and the captured image of the bottle 71 to be inspected captured by the camera # 2 is displayed in the captured image display area 651.

  In the illuminance adjustment area 654, a slider for adjusting illuminance, a display box for illuminance measurement values, a confirmation button for illuminance adjustment, and the like are displayed. Therefore, when the operator moves the slider knob to the right, for example, the control device 50 turns on the illumination 41 (illumination # 2) corresponding to the camera 40 (camera # 2) previously selected in the camera selection area 653. The brightness is controlled so as to increase, and as a result, the illuminance on the light receiving surface of the camera 40 (camera # 2) increases. When the operator moves the slider knob to the left, the control device 50 controls the illumination 41 (illumination # 2) so that its brightness is weakened. As a result, the camera 40 (camera # 2) is controlled. The illuminance at the light receiving surface decreases. The measured value of the illuminance thus increased or decreased is immediately displayed in the illuminance measurement value display box.

In addition, in the illuminance reference value display area 655, a display box for displaying the illuminance reference value for illuminance adjustment is displayed. For example, the display box can be selected from the appropriate illuminance table according to the color density of the beverage to be adjusted for illuminance. The appropriate illuminance obtained is displayed.
It should be noted that a plurality of illuminance reference value display boxes may be provided in association with a plurality of cameras. Further, an upper limit value and a lower limit value indicating a range of the illuminance reference value may be displayed in the illuminance reference value display box.

  In the illuminance measurement target area data display area 656, coordinate data of two points P1 and P2 that define a rectangle of the illuminance measurement target area 657 set on the captured image display area 651 are displayed. Here, two points P1 and P2 are clicked by the operator while moving the cursor of the mouse 62 on the captured image of the transmission image of the bottle 71 to be inspected displayed in the captured image display area 651. It can be set freely according to the above.

  When the illuminance measurement target region 657 is set, the central processing unit 51 of the control device 50 is included in the illuminance measurement target region 657 out of the captured image data of the transmission image of the bottle 71 to be inspected from the image processing device 54. All the luminance data of the pixels are extracted, the luminance data is averaged, and the average value is used as the illuminance measurement value on the light receiving surface of the camera 40. The illuminance measurement value measured (calculated) in this way is displayed in the illuminance measurement value display box in the illuminance adjustment region 654.

  Subsequently, a processing flow of the illuminance adjustment process performed by the central processing unit 51 will be described with reference to FIG. First, the central processing unit 51 displays the illuminance adjustment screen 65 (see FIG. 4) on the display device 60 (step S10). Next, the central processing unit 51 acquires the type number of the beverage to be adjusted, which is input by the operator via the input box in the type selection area 652 of the illuminance adjustment screen 65 and the numeric keyboard 61 (step S11). The plurality of (here, two) all lights 41 are turned on via the device control sequencer 53 (step S12). In this case, it is assumed that the power supply voltage supplied to each illumination 41 is a predetermined initial value.

  Next, the central processing unit 51 acquires selection data of the camera 40 selected by the operator via the radio button in the camera selection area 653 (step S13), and is imaged by the camera 40 selected by the selection data. The captured image by the transmitted light of the inspected bottle 71 is displayed in the captured image display area 651 (step S14).

  At this time, the central processing unit 51 sets the illuminance setting value associated with the product number acquired in step S11 and the selection data of the camera 40 acquired in step S13 from the illuminance adjustment setting table (FIG. 6A). And the acquired illuminance setting value is displayed in the display box of the illuminance reference value display area 655 as the appropriate illuminance of the selected camera 40. Alternatively, the central processing unit 51 associates the color concentration of the beverage with the product number acquired in step S11 from the appropriate illuminance table (see FIG. 6B) (the color concentration associates the product number with the color concentration). Appropriate illuminance associated with (obtained from another table) may be acquired, and the acquired appropriate illuminance may be displayed in the display box of the illuminance reference value display area 655.

  Next, the central processing unit 51 determines whether or not the illuminance measurement target region 657 has been set (step S15). If the illuminance measurement target region 657 has not been set (No in step S15), the operator captures an image. Area data of the illuminance measurement target area 657 set on the image display area 651 is acquired (step S16). If it has been set (Yes in step S15), step S16 is skipped.

  Subsequently, the central processing unit 51 includes pixel data (luminance) of pixels included in the previously set illuminance measurement target region 657 out of the captured image by the transmitted light of the bottle 71 to be inspected displayed in the captured image display region 651. The measured illuminance value is calculated using (data), and the calculated result is displayed in the illuminance measured value display box of the illuminance adjustment area 654 (step S17).

  Here, the operator determines whether or not the illuminance measurement value displayed in the display box of the illuminance adjustment region 654 is within a predetermined appropriate illuminance range, and is within the appropriate illuminance range. If not, move the slider knob left and right to adjust the illuminance measurement. Note that the appropriate illuminance range is an illuminance range that can be regarded as substantially the same as the illuminance reference value displayed in the display box of the illuminance reference value display area 655, for example, within a range of plus or minus 10% of the illuminance reference value. Suppose there is.

  That is, the central processing unit 51 determines whether or not the slider knob of the illuminance adjustment region 654 has been operated (step S18). If the slider knob has been operated (Yes in step S18), the slider The brightness of the illumination 41 is changed by changing the power supply voltage of the illumination 41 associated with the camera 40 selected in step S13 in accordance with the amount of movement of the knob (step S19). And it returns to step S14 and performs the process after step S14 again.

  On the other hand, when the slider knob is not operated in the determination of step S18 (for example, it is not operated for 5 seconds or more) (No in step S18), the central processing unit 51 further operates the confirmation button of the illuminance adjustment area 654. It is determined whether or not it has been done (step S20). Then, when the confirmation button is not operated (for example, it is not operated for 5 seconds or more) (No in Step S20), the central processing unit 51 returns to Step S18 and executes the processing after Step S18 again.

  When the determination button is operated in the determination in step S20 (Yes in step S20), the central processing unit 51 further determines whether or not the illuminance adjustment has been completed for all the cameras 40 (step S21). If the illuminance adjustment for the camera 40 has not been completed (No in step S21), the central processing unit 51 returns to step S13, and again executes the processing from step S18. At this time, in step S13, the operator selects a radio button of the camera 40 that has not been selected until the previous time.

  On the other hand, if it is determined in step S21 that the illuminance adjustment has been completed for all the cameras 40 (Yes in step S21), the central processing unit 51 associates a plurality of beverages with the beverage type number acquired in step S11. The illuminance measurement target area data, the illuminance setting value, and the power supply voltage setting value of the illumination 41 set for each of the cameras 40 are confirmed, and the determined data is registered in the illuminance adjustment setting table (step S22). ), And the illuminance adjustment processing in FIG.

  In the processing flow described above, the operator changes the power supply voltage of the illumination 41 by operating the slider knob of the illuminance adjustment area 654. However, the central calculation is performed without the operator's operation. The processing device 51 compares the illuminance measurement value calculated in step S17 with the appropriate illuminance displayed in the display box of the illuminance reference value display area 655, and by moving the slider knob to the left and right depending on the magnitude, The voltage may be changed.

  Further, after the power supply voltage setting values of the illuminations # 1 and # 2 in the illuminance adjustment setting table are once registered for the bottled beverage having a certain product number by the illuminance adjustment processing of FIG. 5, the bottle having the product number is registered. At the time of foreign matter inspection of the beverage entering, the central processing unit 51 reads the power supply voltage setting values of the illuminations # 1 and # 2 associated with the product type number from the illuminance adjustment setting table, and via the illumination power supply 42 The appropriate illuminance on the light receiving surfaces of the cameras # 1 and # 2 can be obtained simply by supplying power having the power supply voltage set value to the power illuminations # 1 and # 2. Also in this case, the operator's illuminance adjustment operation is not particularly necessary.

  Next, the configuration of the illuminance adjustment setting table and the appropriate illuminance table will be briefly described with reference to FIG. First, as shown in FIG. 6A, the record of the illuminance adjustment setting table includes the beverage type number, type name, color density classification, camera # 1 illuminance measurement target area data, camera # 1 illuminance setting value, and illumination #. 1 power supply voltage setting value, camera # 2 illuminance measurement target area data, camera # 2 illuminance setting value, and illumination # 2 power supply voltage setting value.

  Here, the type number of the beverage is not only the type of beverage, but also the type of beverage (not only wine or beer, but also the producer, production location, production time, brand, etc.), The numbers are distinguished according to the shape and size of the bottle filled with the beverage. The product name is a beverage name or brand name corresponding to the product number. However, the product name is not essential data in the present embodiment. The color density classification is a classification symbol for identifying the color density of the bottled beverage specified by the product type number of the record.

  Here, the number of the plurality of cameras 40 is two, and the illuminance setting values of the cameras # 1 and # 2 are the appropriate illuminances obtained from the appropriate illuminance table corresponding to the color density of the record. .

  As shown in FIG. 6B, the record of the appropriate illuminance table is composed of fields of color density classification, appropriate illuminance, and appropriate image processing parameter value. As described above, the appropriate illuminance and the appropriate image processing parameter value are values obtained and set in advance through experiments or the like. Here, only one field of the appropriate image processing parameter value is provided, but a plurality of fields may be provided for each of the binarization processing and the bubble outline erasing processing, for example.

  As described above, according to the present embodiment, when the operator inputs the type number of the bottle 71 to be inspected for illuminance adjustment into the input box of the type selection area 652 of the illuminance adjustment screen 65 shown in FIG. On the light receiving surface of the selected camera 40 (camera # 1 or camera # 2) according to the color density of the bottled beverage specified, the size of the bottle, the imaging position of the bottle (neck portion or body portion), and the like. The appropriate illuminance is displayed in the display box of the illuminance reference value display area 655. Therefore, the worker can set the illuminance measurement value displayed in the illuminance measurement value display box of the illuminance adjustment area 654 to be approximately the same as the appropriate illuminance or within a predetermined appropriate illuminance range ( For example, the brightness of the illumination 41 is set to an appropriate brightness simply by adjusting the slider knob displayed in the illuminance adjustment area 654 so that it is included in the range of the appropriate illuminance plus / minus 10%. Can do.

  Therefore, according to this embodiment, the adjustment of the brightness of the illumination 41 used for the foreign matter inspection of the beverage is appropriately performed according to the type of the bottle to be inspected and the beverage, or according to the color density of the beverage, and It is possible to perform efficiently.

  Furthermore, if the power supply voltage setting values of the two lights 41 (lights # 1 and # 2) registered in the illuminance adjustment setting table are used, the operator can inspect the bottle 71 to be illuminated from the input box of the product type selection area 652. As long as the product number is input, the central processing unit 51 can refer to the illuminance adjustment setting table and obtain the power supply voltage setting values of the illuminations # 1 and # 2 corresponding to the product number. The two lights 41 (lights # 1 and # 2) may be supplied with power having the power supply voltage setting values of the lights # 1 and # 2 obtained from the illuminance adjustment setting table.

  That is, as long as the worker inputs the type number of the bottle 71 to be inspected for illuminance adjustment, the brightness of the illumination 41 (illumination # 1, # 2) is set to an appropriate brightness without performing the illuminance adjustment operation. Can be set to Therefore, it is possible to further efficiently adjust the brightness of the illumination 41 used for the foreign matter inspection of the beverage.

  Further, in the image processing for detecting the foreign matter from the captured image captured by the camera 40 shown in FIG. 3, the image is stored in the appropriate illuminance table of the storage device 52 according to the color density of the beverage filled in the bottle 71 to be inspected. If the appropriate image processing parameter value is used, the detection accuracy of the foreign matter in the beverage can be further improved.

DESCRIPTION OF SYMBOLS 10 Drinking liquid foreign material inspection apparatus 20 Bottle rotation mechanism part to be inspected 21 Floor member 22a, 22b Side wall member 23 Ceiling member 24 Rear wall member 25 Rotation base 26 Motor 27 Air cylinder 28 Ceiling support member 29 Columnar pressing member 30 Inspected bottle tilting mechanism Unit 31 Tilt drive device 33 Rotating shaft 40 Camera (imaging device)
DESCRIPTION OF SYMBOLS 41 Illumination 42 Illumination power supply 50 Control apparatus 51 Central processing unit 52 Storage apparatus 53 Device control sequencer 54 Image processing apparatus 60 Display apparatus 61 Numeric keyboard 62 Mouse 65 Illuminance adjustment screen 71 Inspected bottle 71a Cap 651 Captured image display area 652 Product type selection Area 653 Camera selection area 654 Illuminance adjustment area 655 Illuminance reference value display area 656 Illuminance measurement target area data display area 657 Illuminance measurement target area

Claims (6)

Illumination provided behind a bottle to be inspected filled with a beverage, an imaging device for imaging a shadow image of the bottle to be inspected obtained by transmitting illumination light of the illumination through the bottle to be inspected, and the imaging An image processing device that performs image processing on a shadow image of the bottle to be inspected and detects foreign matter in the beverage, and a controller, and a beverage foreign matter inspection device comprising:
A plurality of the imaging devices are provided, and each imaging device images different portions of the bottle to be inspected,
The illumination is provided at a position opposite to the imaging device across the bottle to be inspected, one for each of the plurality of imaging devices.
The controller is
The illuminance measurement value on each light receiving surface of the plurality of imaging devices is calculated using the pixel data of the shadow image of the bottle to be inspected that is captured by the imaging device,
The calculated illuminance measurement values on the respective light receiving surfaces of the plurality of imaging devices are defined with respect to a predetermined illuminance reference value corresponding to the type of beverage liquid filled in the bottle to be inspected. A beverage liquid foreign matter inspection apparatus, wherein the brightness of each of the plurality of lights is individually set so as to be included in an illuminance range. The controller is
It has a storage device that stores an appropriate illuminance value corresponding to each color concentration of the beverage liquid,
The appropriate illuminance value corresponding to the color density of the beverage liquid filled in the bottle to be inspected is obtained with reference to the storage device, and the obtained appropriate illuminance value is used as the illuminance reference value. The beverage liquid foreign matter inspection apparatus according to 1. The controller is
An input device for inputting a product number for identifying the product type of the bottle to be inspected; and a storage device for storing information in which illumination control information for controlling the brightness of each of the plurality of lights is associated with the product number; , And
The type number of the bottle to be inspected input via the input device is acquired, and the brightness of each of the plurality of lights associated with the type number of the bottle to be inspected is controlled with reference to the storage device The beverage liquid foreign matter inspection device according to claim 1, wherein lighting control information to be obtained is obtained, and brightness of each of the plurality of lights is set based on the obtained lighting control information. Illumination provided behind a bottle to be inspected filled with a beverage, an imaging device for imaging a shadow image of the bottle to be inspected obtained by transmitting illumination light of the illumination through the bottle to be inspected, and the imaging An image processing device that performs image processing on a shadow image of the bottle to be inspected and detects foreign matter in the beverage, and a control device, the beverage foreign matter inspection method in a beverage foreign matter inspection device comprising:
A plurality of the imaging devices are provided, and each imaging device images different portions of the bottle to be inspected,
The illumination is provided at a position opposite to the imaging device across the bottle to be inspected, one for each of the plurality of imaging devices.
The controller is
The illuminance measurement value on each light receiving surface of the plurality of imaging devices is calculated using the pixel data of the shadow image of the bottle to be inspected that is captured by the imaging device,
The calculated illuminance measurement values on the respective light receiving surfaces of the plurality of imaging devices are defined with respect to a predetermined illuminance reference value corresponding to the type of beverage liquid filled in the bottle to be inspected. A beverage liquid foreign matter inspection method, wherein the brightness of each of the plurality of lights is individually set so as to be included in an illuminance range. The controller is
It has a storage device that stores an appropriate illuminance value corresponding to each color concentration of the beverage liquid,
The appropriate illuminance value corresponding to the color density of the beverage liquid filled in the bottle to be inspected is obtained with reference to the storage device, and the obtained appropriate illuminance value is used as the illuminance reference value. 4. A method for inspecting a foreign substance in a beverage according to 4 . The controller is
An input device for inputting a product number for identifying the product type of the bottle to be inspected; and a storage device for storing information in which illumination control information for controlling the brightness of each of the plurality of lights is associated with the product number; , And
The type number of the bottle to be inspected input via the input device is acquired, and the brightness of each of the plurality of lights associated with the type number of the bottle to be inspected is controlled with reference to the storage device 5. The method for inspecting a foreign matter according to claim 4 , wherein brightness control information to be obtained is obtained, and brightness of each of the plurality of lights is set based on the obtained illumination control information.

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