JP6420065B2 - Inspection device - Google Patents

Description

  The present invention relates to an inspection apparatus.

  In the conveyance line of articles that contain and ship contents such as food in packaging materials such as film packaging materials, the contents (for example, biting of the contents into the sealing portion (sealing portion) of the packaging material) In order to prevent the shipment of the article in which the contents in the packaging material are damaged, foreign matter is mixed in the packaging material, etc., it is necessary to inspect the condition of the article.

  As an apparatus for inspecting the state of such an article, for example, in Patent Document 1, it is determined whether or not the contents are bitten in the sealing portion of the packaging material, and the contents are bitten in the sealing portion. An X-ray inspection apparatus is disclosed that excludes a determined article from a production line as a defective product.

  In such an inspection apparatus, a region where a horizontal seal portion and a vertical seal portion (so-called back pasting portion) extending in a direction crossing the horizontal seal portion overlap in a plane, or a region where printing is performed on the packaging material The portion of the transmission image corresponding to (hereinafter referred to as “low transmittance region”) becomes dark (black) as a whole. For this reason, even if there is no seal failure in the portion corresponding to the low transmittance region of the transmission image, it may be erroneously determined that there is a seal failure in this portion. For such problems, for example, it is possible to avoid misjudgment by masking the low transmittance region and removing it from the inspection target, or to determine whether there is a seal failure in the low transmittance region. Some measures are taken, such as adjusting the sensitivity when generating images.

JP 2010-286424 A

  However, in the former method, even if there is a seal failure in the masked portion, it cannot be determined as a defective product. In the latter handling method, the determination accuracy of the presence or absence of a seal failure in the seal portion is lowered.

  Therefore, an object of the present invention is to provide an inspection apparatus capable of determining the presence or absence of a seal failure in a low transmittance region of the seal portion while maintaining the accuracy of determining the presence or absence of a seal failure in the seal portion.

  An inspection apparatus according to the present invention includes a light irradiation unit that irradiates an article whose contents are wrapped in a packaging material, an image generation unit that generates a transmission image of the article based on light transmitted through the article, and a transmission image. And a determination unit that determines whether there is a seal failure based on the first region that is higher than the predetermined transmittance in the sealing part of the packaging material based on the transmission image, and the sealing of the packaging material A region specifying unit that specifies a second region, which is a region having a lower transmittance than the first region, and the determination unit determines whether there is a seal failure in the first region and whether there is a seal failure in the second region. Are determined based on different criteria.

  In the inspection apparatus having this configuration, in the seal portion, it is difficult to determine the presence or absence of a seal failure in the first region that is not a low-transmittance region, in which the presence or absence of a seal failure can be determined by a conventional method. The second region which is a transmittance region is specified, and the presence or absence of a seal failure in each region is determined for each of these regions based on different criteria. Since the optimum determination criteria are used to determine the presence or absence of a seal failure in each region, it is possible to determine the presence or absence of a seal failure in the second region while maintaining the accuracy of determining the presence or absence of a seal failure in the first region. It becomes.

  In the inspection apparatus of the present invention, the determination unit may determine whether or not there is a seal failure in the first region and whether or not there is a seal failure in the second region based on different gray values.

  In the transmission image, the gray value is different between a portion where there is a seal failure in the second region which is a low transmittance region and a portion where there is a seal failure in the first region which is not the low transmittance region. In the inspection apparatus having this configuration, since the optimum gray value can be used for detecting a seal failure in the first region and the second region, the accuracy of detecting the presence or absence of a seal failure in each region can be increased.

  The inspection apparatus of the present invention further includes a correction image generation unit that corrects the brightness of the transmission image and generates a corrected transmission image that is brighter than the transmission image, and has a seal failure in the first region based on the transmission image. It may be determined whether or not there is a seal defect in the second region based on the corrected transmission image.

  In the inspection apparatus having this configuration, in the seal portion, it is possible to determine the presence or absence of a seal failure by a conventional method, the first region that is not a low transmittance region, and it is difficult to determine the presence or absence of a seal failure by the conventional method, and the low transmission The second region which is the rate region is specified, and for each of these regions, the presence or absence of a seal failure at each position is determined using transmission images having different brightness. That is, since a transmission image having an optimal brightness is used to determine the presence or absence of a seal failure in each region, the accuracy of determination of the presence or absence of a seal failure in the first region is maintained, and the seal failure in the second region is maintained. Judgment is possible.

  In the inspection apparatus having this configuration, it is possible to generate a transmission image with optimum brightness for determining the presence or absence of a seal failure in the second region, which is a low transmittance region.

  ADVANTAGE OF THE INVENTION According to this invention, the presence or absence of the seal defect in the low transmittance | permeability area | region of a seal part can be determined, maintaining the determination precision of the presence or absence of the seal defect in a seal part.

  In the inspection apparatus of the present invention, the region specifying unit may specify the first region and the second region based on the brightness acquired from the portion corresponding to the seal portion in the transmission image.

  In the transmission image, for example, the brightness is different between the low transmittance region, which is a portion where the vertical seal portion overlaps the horizontal seal portion or a portion where the packaging material is printed, and the other portions. In the inspection apparatus having this configuration, it is possible to easily specify the second region to be the low transmittance region by a simple process of dividing the region of the transmission image based on the brightness.

  In the inspection apparatus of the present invention, the region specifying unit may specify the second region based on a relative position from a reference position in a transmission image stored in advance.

  In an article, for example, a part where a vertical seal part overlaps a horizontal seal part or a part printed on a packaging material is often at the same position in any article. In the inspection apparatus having this configuration, the relative distance from the reference position in the transmission image is stored as the position of the second region that is the low transmittance region, so which part of the transmission image generated by the image generation unit is low transmission It can be easily specified whether the second region is a rate region.

  In the inspection apparatus of the present invention, the region specifying unit may further specify a plurality of regions in the second region according to the transmittance.

  In the inspection apparatus having this configuration, a transmission image having a more optimal reference value or brightness is used to determine the presence / absence of a seal failure in each region. Therefore, the accuracy of determining the presence / absence of a seal failure can be increased. .

  In the inspection apparatus of the present invention, the corrected image generation unit may adjust the degree of correction of brightness according to a predetermined transmittance for specifying the first region and the second region.

It is a side view of the near-infrared inspection apparatus concerning one embodiment. It is a top view of the conveyance line in which the near-infrared inspection apparatus of FIG. 1 was installed. It is a control block diagram which shows the structure of the control computer with which the near-infrared inspection apparatus of FIG. 1 is provided. 3 is a plan view of an article G. FIG. It is a figure which respectively shows an example of the transmission image of articles | goods, and an example of the corrected transmission image which correct | amended the brightness | luminance of the transmission image. It is a figure for demonstrating an example of the method of pinpointing the position of a 2nd area | region. It is a figure for demonstrating an example of the method of pinpointing the position of a 2nd area | region. 6 is a histogram of luminance of a portion corresponding to a horizontal seal portion of the transparent image in FIG. 5. It is a figure for demonstrating an example of the method of pinpointing the position of a 2nd area | region. It is a figure for demonstrating an example of the method of pinpointing the position of the 2nd field in modification 2.

  Hereinafter, an embodiment will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The dimensional ratios in the drawings do not necessarily match those described.

(1) Overall Configuration A near-infrared inspection apparatus (inspection apparatus) 1 shown in FIG. 1 includes a packaging material 90 made of a resin film as shown in FIG. 3 and contents 93 accommodated in the packaging material 90. It is an inspection device for inspecting an article G that it has. The article G is, for example, a bag-like confectionery that is conveyed on a conveyance line for food or the like. The article G is formed into a bottomed cylindrical body by sealing one end of a cylindrical body in which a sheet-like packaging material 90 is sealed (sealed) by a vertical seal portion 97 with a horizontal seal portion (seal portion) 91B. After the inside of the bottomed cylindrical body (the accommodating portion 92) is filled with the contents 93, the other open end is sealed with a lateral seal portion (seal portion) 91A.

  The packaging material 90 is made of a material having optical transparency, such as a transparent material or a translucent material. The package material itself may have a color, or the packaging material may be colored by printing or the like. In the present embodiment, description will be given by taking as an example an article G in which the contents 93 are packaged with a single-color material having optical transparency.

  As shown in FIG. 1 and FIG. 2, the near-infrared inspection apparatus 1 includes a light irradiation unit 2, a light detection unit 3, and a control computer (image generation unit, region specifying unit, corrected image generation unit, determination unit) 4. And a distribution mechanism (distribution unit) 70. The light irradiation unit 2 is disposed below the conveyors 11 and 12. The light detection unit 3 is disposed above the conveyors 11 and 12. The light irradiation unit 2 and the light detection unit 3 face each other through a gap provided between the transport conveyors 11 and 12.

  Returning to FIG. 2, the light irradiation unit 2 includes a near infrared irradiator 13 extending along the gap below the gap between the conveyors 11 and 12. The light irradiation unit 2 irradiates the article G with near infrared rays from the near infrared irradiator 13 when the article G conveyed by the conveyors 11 and 12 passes over the gap between the conveyors 11 and 12. The near infrared wavelength is 780 nm to 1400 nm.

  The light detection unit 3 has a near-infrared line sensor 14 that extends along the gap above the gap between the conveyors 11 and 12. The light detection unit 3 uses the near-infrared line sensor 14 to transmit near-infrared light transmitted to the article G when the article G conveyed by the conveyors 11 and 12 passes over the gap between the conveyors 11 and 12. The detection signal is output to the control computer 4.

  The near-infrared line sensor 14 detects near-infrared rays that have passed through the article G. The near-infrared line sensor 14 has a plurality of detection elements 14 a arranged in a line in a horizontal direction orthogonal to the conveyance direction of the article G by the conveyance conveyors 11 and 12.

  The light irradiation unit 2 and the light detection unit 3 are cantilevered by a support column 6 erected on the pedestal 5 with the near infrared light path from the light irradiation unit 2 to the light detection unit 3 exposed to the surrounding atmosphere. Yes. Note that the inspection area of the article G may be covered with a shield box or the like.

  The control computer 4 is accommodated in the column 6 and performs operation control of the near-infrared inspection apparatus 1 and various signal processing. As shown in FIG. 5A, the control computer 4 acquires a near-infrared transmission image 50 of the article G based on the detection signal output from the light detection unit 3, and 1 pixel in the transmission image 50. Based on the color value of the hit, the presence or absence of the content 93 in the horizontal seal portions 91A and 91B (for example, the content 94), the presence or absence of foreign matter 95 other than the content 93, and the cracking of the content 93 The presence or absence of is determined. The support 6 is provided with a display unit such as a display and an operation unit such as a touch button in addition to the control computer 4. However, the control computer 4, the display unit, and the operation unit may be provided in a control box or the like prepared separately from the base 5 and the column 6.

  As shown in FIG. 2, the article G is continuously conveyed to the near-infrared inspection apparatus 1 by the conveyors 11 and 12. The control computer 4 determines whether or not the contents 93 are bitten into the horizontal seal portions 91A and 91B in the conveyed article G, whether or not foreign matter 95 other than the contents 93 is mixed, and whether or not the contents 93 are cracked. Then, these determination results are transmitted to the distribution mechanism 70 arranged on the downstream side of the near-infrared inspection apparatus 1.

  The distribution mechanism 70 includes three determination items: whether or not the contents 93 are bitten into the horizontal seal portions 91 </ b> A and 91 </ b> B, whether or not foreign matter 95 other than the contents 93 is mixed, and whether or not the contents 93 are cracked. For the article G determined to be present in at least one item, the article G is sent to the collection box 73 removed from the regular line conveyor 80 by operating the arm 71. The distribution mechanism 70 is an article that is determined to be a non-defective product in which the content 93 is not bitten into the horizontal seal portions 91A and 91B, no foreign matter 95 other than the content 93 is mixed, and the content 93 is not cracked. For G, the article G is conveyed in the downstream direction by a regular line conveyor 80.

(2) Configuration of Control Computer The control computer 4 is a part that controls various operations in the near-infrared inspection apparatus 1, and includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The As shown in FIG. 4, the control computer 4 includes an image generation unit 31, a region specifying unit 33, a correction image generation unit 35, and a determination as conceptual parts for executing various control processes in the near-infrared inspection apparatus 1. Part 37. Such a conceptual part can be configured as software that is executed by the CPU after a program stored in the ROM is loaded onto the RAM, for example. The control computer 4 may be configured as hardware such as an electronic circuit.

(2-1) Image Generation Unit The image generation unit 31 is a part that generates a transmission image 50 of the article G based on the light transmitted through the article G. Specifically, the image generation unit 31 generates a transmission image 50 related to the article G as shown in FIG. 5A based on the detection signal continuously transmitted from the near infrared line sensor 14. . The shading of the transmission image 50 indicates the light transmittance. The darker the color, the smaller the light transmittance.

(2-2) Region Specifying Unit The region specifying unit 33 is based on the transmission image 50 and includes a first region 98 that is higher than a predetermined light transmittance in the lateral seal portions 91A and 91B of the packaging material 90, and the packaging material 90. In the horizontal seal portions 91A and 91B, the second region (low transmittance region) 99, which is a region having a lower light transmittance than the first region, is specified. In the present embodiment, as shown in FIG. 3, the portions that become the second region 99 in the horizontal seal portions 91 </ b> A and 91 </ b> B include the horizontal seal portions 91 </ b> A and 91 </ b> B and the vertical seal portion 97 when the article G is viewed in plan. The overlapping portions and the portions that become the first region 98 in the horizontal seal portions 91A and 91B are portions where the horizontal seal portions 91A and 91B and the vertical seal portion 97 do not overlap. The first region 98 and the second region 99 have different light transmittances, and the light transmittance of the second region 99 is lower than that of the first region 98.

  A method for specifying the first region 98 and the second region 99 will be specifically described. The area specifying unit 33 according to the present embodiment performs the following process for each article G to be inspected, that is, for each transmission image 50 generated by the image generation unit 31.

  As shown in FIG. 6A, the region specifying unit 33 masks the accommodation region 52 other than the portions 51 </ b> A and 51 </ b> B corresponding to the horizontal seal portions 91 </ b> A and 91 </ b> B in the transmission image 50. Next, the area specifying unit 33 generates histograms of the luminance of the portions 51A and 51B corresponding to the horizontal seal portions 91A and 91B in the transmission image 50, respectively. FIG. 8 is a histogram of luminance in the portion 51A corresponding to the horizontal seal portion 91A in the article G.

  As shown in FIG. 8, the portion 51A corresponding to the horizontal seal portion 91A has two luminance peaks. That is, one is the luminance of the portion corresponding to the first region 98 (see FIG. 3), and the other is the luminance of the portion corresponding to the second region 99 (see FIG. 3). As described above, since the light transmittance of the second region 99 is lower than that of the first region 98, the portion corresponding to the second region 99 in the transmission image 50 has a luminance compared to the portion corresponding to the first region 98. Lower.

  For example, when the area of the second region 99 occupies 10% of the area of the horizontal seal portion 91A, the region specifying unit 33 counts from the smaller luminance in the histogram shown in FIG. Is determined as a threshold value B. Next, the region specifying unit 33 binarizes the portion 51A corresponding to the horizontal seal portion 91A of the transmission image 50 using the threshold value B. That is, the region specifying unit 33 converts a region having a luminance higher than the threshold B into white and a region equal to or lower than the threshold B into black in the portion 51A corresponding to the horizontal seal portion 91A in FIG. The region specifying unit 33 binarizes the portion 51B corresponding to the horizontal seal portion 91B of the transmission image 50 by the same method. FIG. 6B is an image obtained by binarizing the portions 51A and 51B corresponding to the horizontal seal portions 91A and 91B of the transmission image 50 by such a method.

  Next, the area specifying unit 33 labels each of the areas converted to black in the previous binarization. Next, the region specifying unit 33 maintains only the region having the largest area among the regions 63 labeled in the portion 51A corresponding to the horizontal seal portion 91A as black, and converts the remaining regions into white (see FIG. 7). Thereby, the influence of noise is eliminated, and the extraction accuracy of the portion 99A corresponding to the second region 99 is increased. The area specifying unit 33 performs the same process in the portion 51B corresponding to the horizontal seal portion 91B.

  Next, the region specifying unit 33 specifies the position of the region 63 converted to black in the portion 51A corresponding to the horizontal seal portion 91A of the transparent image 50. At this time, the area specifying unit 33 may perform an expansion process on the area 63 converted to black, and specify the position of the area 63 as a range wider than the previously specified range. As a result, as shown in FIGS. 5A and 5B, the position of the portion 99A corresponding to the second region 99 in the transparent image 50 or a corrected transparent image 50A described later is specified. Further, by specifying the position of the portion 99A corresponding to the second region 99, the position of the portion 98A corresponding to the first region 98 in the transparent image 50 or a corrected transparent image 50A described later is also specified.

(2-3) Correction Image Generation Unit The correction image generation unit 35 corrects the luminance (brightness) of the transmission image 50 shown in FIG. 5A, and transmits the transmission as shown in FIG. This is a portion that generates a corrected transmission image 50A that is an image having a higher brightness (brighter) than the image 50. The corrected transmission image 50 </ b> A may adjust the degree of correction of brightness according to the light transmittance in the first region 98 and the second region 99.

(2-4) Determination Unit The determination unit 37 determines whether or not the first region 98 is bitten by using a portion 98A corresponding to the first region 98 of the transparent image 50 illustrated in FIG. The presence or absence of biting in the second region 99 is a portion that is determined using a portion 99A corresponding to the second region 99 of the corrected transmission image 50A shown in FIG. That is, the determination unit 37 converts a portion 99A corresponding to the second region 99 of the transparent image 50 shown in FIG. 5A as shown in FIG. 9 into a corrected transparent image 50A shown in FIG. It can be said that the inspection of biting of the contents 93 in the horizontal seal portions 91A and 91B is performed using the transmission image 50C replaced with the portion 99A corresponding to the second region 99.

  When the portion 98A corresponding to the first region 98 of the transparent image 50C has a portion having a luminance equal to or lower than the first threshold value, or the portion 99A corresponding to the second region 99 of the transparent image 50C, the determination unit 37 When there is a portion having a luminance equal to or lower than 2 threshold values (second threshold value <first threshold value), it is determined that the contents 93 are bitten in the horizontal seal portions 91A and 91B. For example, the determination unit 37 detects a portion 54 corresponding to the content 94 bitten by the horizontal seal portion 91B.

  In addition, the determination unit 37 determines that the portion 98A corresponding to the first region 98 of the transparent image 50C has no portion having a luminance equal to or lower than the first threshold, and the portion 99A corresponding to the second region 99 of the transparent image 50C. When there is no portion having a luminance equal to or lower than the second threshold value (second threshold value <first threshold value), it is determined that the contents 93 are not caught in the horizontal seal portions 91A and 91B. If the determination unit 37 determines that the bite is present, the determination unit 37 transmits a detection signal including information to that effect to the distribution mechanism 70 disposed on the downstream side of the near-infrared inspection apparatus 1.

  The determination unit 37 further determines the presence or absence of foreign matter 95 other than the content 93 and the presence or absence of cracking of the content 93 based on the transmission image 50. When the determination unit 37 determines that foreign matter 95 other than the content 93 is mixed, and when it is determined that the content 93 is cracked, the determination unit 37 sends a detection signal including information to that effect to the near-infrared inspection apparatus 1. It transmits to the distribution mechanism 70 arrange | positioned downstream. In addition, the presence or absence of the foreign matter 95 other than the content 93 and the presence or absence of the crack of the content 93 can be determined using a well-known technique.

(3) Features, Actions, and Effects In the near-infrared inspection apparatus 1 of the above embodiment, whether or not the contents 93 are bitten in the first region 98 is first determined using the transmission image 50 shown in FIG. Whether or not the contents 93 are bitten in the second region 99 is determined based on the threshold value, and is determined based on the second threshold value using the corrected transmission image 50A shown in FIG. 5B. Optimal transmission images (transmission image 50 and corrected transmission image 50A) and reference values (first threshold value and second threshold value) for determining the presence or absence of biting in each of the first region 98 and the second region 99 Therefore, it is possible to determine the presence or absence of biting in the second region 99 while maintaining the accuracy of determining whether or not there is biting in the first region 98.

  In the near-infrared inspection apparatus 1 of the above-described embodiment, the region specifying unit 33 sets the first region 98 and the second region 99 for each article G to be inspected, that is, for each transmission image 50 generated by the image generation unit 31. Location is being identified. Thereby, even when the density of the generated transmission image 50 changes for each article G depending on the conveyance state of the article G, the positions of the first region 98 and the second region 99 are specified with high accuracy. Can do. This process is particularly effective in the near-infrared inspection apparatus 1 in which the irradiation characteristics of the irradiation apparatus are greatly spread and the amount of light transmission varies greatly depending on the distance from the irradiation apparatus to the article G.

(4) Modifications Although one embodiment has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention.

<Modification 1>
In the above embodiment, the corrected transmission image that is an image having higher luminance than the transmission image 50 as shown in FIG. 5B by correcting the entire luminance of the transmission image 50 generated from the image generation unit 31. Although an example in which 50A is generated has been described, the present invention is not limited to this. For example, the corrected image generation unit 35 may correct the luminance of a part of the transparent image 50 (the part used by the determination unit 37 for determination). If it demonstrates in the example of the said embodiment, you may correct | amend so that the brightness | luminance of only the part 99A applicable to the 2nd area | region 99 in the transmissive image 50 shown by FIG. In this case, the processing load on the corrected image generation unit 35 can be reduced, and the processing speed can be increased.

<Modification 2>
In the embodiment described above, the positions of the first region 98 and the second region 99 in the transparent image 50 are specified based on the luminance histograms in the portions 51A and 51B corresponding to the horizontal seal portions 91A and 91B of the transparent image 50. Although described with an example, the present invention is not limited to this. For example, as illustrated in FIG. 10, the region specifying unit 33 positions each of the first region 98 and the second region 99 in the transmission image 50 based on the relative positions with reference to the four corners SP1 to SP4 of the article G. May be specified.

  Specifically, the area specifying unit 33 binarizes the transparent image 50 shown in FIG. 5A, for example, and extracts the four corners SP1 to SP4. Next, the area specifying unit 33 includes distances from the four corners SP1 to SP4 stored in a storage unit (not shown) to the centroid position of the first area 98 or the centroid position of the second area 99, the first area 98 and Based on information such as the shape of the second region 99, the positions of the first region 98 and the second region 99 in the transmission image 50 are specified.

<Modification 3>
In the above embodiment, the second region is a portion where the horizontal seal portions 91A, 91B and the vertical seal portion 97 overlap when the article G is viewed in plan, and the first region is the horizontal seal portions 91A, 91B and the vertical seal portion. Although the example which makes it the part which does not overlap with 97 was demonstrated, this invention is not limited to this. For example, when the packaging material 90 is colored by printing or the like, the second region is a portion where the color is applied in the horizontal seal portion, and the first region is not colored in the horizontal seal portion. It may be a part. Also in this case, the light transmittance of the first region 98 and the second region 99 is different from each other, and the light transmittance of the second region 99 is lower than that of the first region 98.

  Conventionally, in the same manner as the article G of the above-described embodiment, in an article packaged with a packaging material having a colored portion and a non-colored portion, the presence or absence of biting in the colored portion is determined. It was difficult. In the near-infrared inspection apparatus according to the modified example 3, it is optimal for determining whether or not there is biting in each of the first region where the color is not applied and the second region where the color is applied in the horizontal seal portion. Since the transmission image and the reference value can be used, it is possible to determine the presence / absence of biting in the second region while maintaining the determination accuracy of the presence / absence of biting in the first region.

  In the near-infrared inspection apparatus according to Modification 3, the second region may be further divided into a plurality of regions depending on the light transmittance. As a result, when the color of the color applied to the packaging material is different (when the light transmittance is different), the optimal transmission image for determining whether or not the contents are bitten according to the color of the color or the like And a reference value can be used. As a result, a transmission image having a more optimal reference value or brightness is used to determine the presence or absence of biting in each region, so that the determination accuracy of the presence or absence of biting can be improved.

<Modification 4>
In the above embodiment, the presence / absence of biting in the first region 98 is determined using the portion 98A corresponding to the first region 98 of the transparent image 50 shown in FIG. The presence / absence of the presence / absence has been described using an example of determining using the portion 99A corresponding to the second region 99 of the corrected transmission image 50A shown in FIG. 5B, but the present invention is not limited to this. For example, the presence / absence of biting in the first region 98 is determined using a portion 98A corresponding to the first region 98 of the transmission image 50 shown in FIG. The determination may be made using a portion 99A corresponding to the second region 99 of the corrected transmission image 50A shown in FIG. In this case, the determination unit may determine the presence / absence of biting in the first region 98 and the presence / absence of biting in the second region 99 based on different criteria. That is, when determining the presence or absence of biting failure in the second region 99, the determination unit may determine the presence or absence of biting failure using a darker color than the first region 98 as a reference value (threshold).
<Other variations>

  Although the said embodiment gave and demonstrated the example which irradiates the near infrared rays to the goods G and produces | generates the transmission image 50 based on the near infrared rays which permeate | transmitted the said goods G, this invention is not limited to this. For example, the present invention can be applied to an X-ray inspection apparatus (inspection apparatus) including an image generation unit that irradiates an article G with X-rays and generates a transmission image based on the X-rays transmitted through the article G. It is. In this case, it is possible to inspect a packaged article by depositing a packaging material such as an aluminum material.

  In the above embodiment, the determination unit 37 determines the presence or absence of biting in the horizontal seal portions 91 </ b> A and 91 </ b> B of the packaging material 90 based on the transmission image 50, and the foreign matter other than the contents 93 based on the transmission image 50. Although the example which determines the presence or absence of 95 mixing and the presence or absence of the crack of the content 93 was given and demonstrated, this invention is not limited to this. For example, the present invention may be configured as a biting determination device that determines only whether or not there is biting in the lateral seal portions 91A and 91B of the packaging material 90 based on near infrared or X-ray transmission images.

  In the above embodiment, the example of determining the presence or absence of the contents 93 in the horizontal seal portions 91A and 91B has been described. However, the present invention is not limited to this, and the presence or absence of other seal defects is determined. Also good.

  Various embodiments and modifications described above may be combined in various ways without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Near-infrared inspection apparatus (inspection apparatus), 2 ... Light irradiation part, 3 ... Light detection part, 4 ... Control computer (Image generation part, area | region identification part, correction | amendment image generation part, determination part), 11, 12 ... Conveyance Conveyor, 31 ... Image generation unit, 33 ... Area specifying unit, 35 ... Correction image generation unit, 37 ... Determination unit, 50 ... Transmission image, 50A ... Correction transmission image, 90 ... Packaging material, 91A, 91B ... Horizontal seal unit ( Seal part), 93 ... Contents, 95 ... Foreign matter, 97 ... Vertical seal part, 98 ... First region, 99 ... Second region, G ... Article.

Claims (8)

A light irradiation unit which contents are irradiated with near infrared rays packaged article in packaging material, based on the near infrared that has passed through the article, an image generating unit that generates a transmission image of the article, the transmission image In an inspection apparatus comprising a determination unit that determines the presence or absence of a seal failure based on
Based on the transmission images, the first region is higher than the predetermined transmission area in the transverse seal portion of the packaging material, the vertical seal portion overlapping the packaging material to the lateral sealing portion of the packaging material, from the first region And a second region that is a region having a low transmittance, and a region identifying unit that identifies the second region,
The determination unit is an inspection apparatus that determines the presence / absence of the seal failure in the first region and the presence / absence of the seal failure in the second region based on different criteria. A correction image generation unit that corrects the brightness of the transmission image and generates a corrected transmission image that is brighter than the transmission image;
The determination unit determines the presence or absence of the seal failure in the first region based on the transmission image, and determines the presence or absence of the seal failure in the second region based on the corrected transmission image. The inspection device described. A light irradiation unit which contents are irradiated with near infrared rays packaged article in packaging material, based on the near infrared that has passed through the article, an image generating unit that generates a transmission image of the article, the transmission image In an inspection apparatus comprising a determination unit that determines the presence or absence of a seal failure based on
Based on the transmission images, the first region is higher than the predetermined transmission area in the transverse seal portion of the packaging material, the vertical seal portion overlapping the packaging material to the lateral sealing portion of the packaging material, from the first region A region specifying unit that specifies the second region that is also a region having low transmittance ,
A correction image generation unit that corrects the brightness of the transmission image and generates a corrected transmission image that is brighter than the transmission image ;
The determination unit determines the presence or absence of the seal failure in the first region and the presence or absence of the seal failure in the second region based on different criteria, and a portion corresponding to the second region of the transmission image An inspection apparatus that determines whether or not there is a seal failure in each of the first region and the second region, using a replacement transmission image in which a portion corresponding to the second region of the corrected transmission image is replaced . The inspection apparatus according to claim 2 , wherein the correction image generation unit adjusts the brightness correction degree according to the predetermined transmittance for specifying the first area and the second area. The determination unit is configured and the presence or absence of the defective seal in the first region, wherein the presence or absence of the defective seal in the second region, respectively determines, based different gray values to each other, one of claims 1-4 one Inspection device according to item . The area specifying unit specifies each said first region and said second region based on the brightness obtained from the portion corresponding to the sealing portion of the transmitted image, any one of claims 1 to 5 Inspection device according to item. The region specifying unit specifies the second region based on the relative position from the reference position in the transmission image stored in advance, the inspection device according to any one of claims 1-5. The inspection apparatus according to any one of claims 1 to 7 , wherein the area specifying unit further specifies a plurality of areas in the second area according to the transmittance.