JP3860154B2 - X-ray inspection equipment - Google Patents

Description

  The present invention relates to an X-ray inspection apparatus for inspecting the presence or absence of foreign matter in an inspection object from the amount of X-ray transmission when X-rays are exposed, and in particular, the seal width of a product that actually flows on a transfer line, the product The present invention relates to an X-ray inspection apparatus that can easily set a size, a conveyance direction, and the like on an operation screen.

  As disclosed in, for example, Patent Document 1 below, the X-ray inspection apparatus exposes X-rays to various types of inspection objects (raw meat, fish, processed foods, pharmaceuticals, etc.) that are sequentially transported on the transport line. It is generally known as a device that detects whether or not foreign matter such as metal, glass, stone, and bone is mixed in an object to be inspected based on the amount of transmitted X-rays.

  By the way, in the case of a product in which an object to be packaged is accommodated in a bag-like package such as a poultice or a seasoning, the opening is sealed after the object to be packaged is accommodated in the package. At that time, an article to be packaged or its waste may be caught in the seal portion of the package, and it is necessary to eliminate the product with a defective seal as a defective product. For this reason, in the conventional X-ray inspection apparatus, before inspection, various dimensions such as the actual product size of the inspection object and the seal width of the seal portion are set and inputted to inspect for the presence or absence of a seal failure.

  FIG. 7 shows an example of a setting input screen for inputting various dimensions of the inspection object displayed on the display unit of the conventional X-ray inspection apparatus. The setting input screen 51 shown in FIG. 7 is an example in the case where there are seal portions on the four sides around the package of the object to be inspected. The “flow direction parallel product size”, “flow direction vertical product size”, “detector” Input area 53 (53a) provided in each setting item 52 (52a to 52f) of "back side seal width", "detector front side seal width", "flow direction parallel right seal width", and "flow direction parallel left seal width" Numerical values are input every .about.53f).

As described above, in the conventional X-ray inspection apparatus, the horizontal / vertical width with respect to the flow direction of the object to be inspected and the seal width of each seal portion are viewed while checking the products actually inspected for each input area 53 of each setting item 52. It is configured to input numerical values. To explain further, for example, in the case of an inspection object contained in a non-transparent package such as a poultice, the seal part of the inspection object and the width of the inspection object are compared with the actual product, Enter the product size and the seal width of each side seal in the input area of each input item. After the above setting is completed, the inspection object to be actually inspected is made to flow on the transport line, and foreign matter is mixed from the X transmission image of the inspection object at the time of X-ray exposure based on the setting information of the inspection object described above. The product is inspected for the presence or absence of seals and the presence or absence of defective seals, and the quality of the product is judged and selected.
JP 2003-139723 A

  However, in the conventional X-ray inspection apparatus, a plurality of setting items 52 (52a to 52f) on the setting input screen 51 are displayed as character strings, and the product size and the seal are observed while observing the inspection object actually flowing on the transport line. It was necessary to input numerical values one by one in the input area 53 of each setting item 52 corresponding to the width. For this reason, in the case of a user unfamiliar with the apparatus, it is difficult to understand the correspondence between the product size and seal width of the actually inspected object and each input item, and there is a possibility that a numerical value may be input erroneously. There was a problem that took time. In addition, when the width dimension of the seal portion is different on the four sides as the object to be inspected, the setting for specifying each side is also increased, and therefore, the correspondence between the input items related to the dimensions and the dimensions of the inspected object actually inspected is possible. Furthermore, it became difficult to understand, and the problem of making the setting difficult was invited.

  Therefore, the present invention has been made in view of the above problems, and displays the X-ray transmission image of the inspection object at the time of X-ray exposure and the dimension setting input screen on the same screen to display each dimension of the inspection object. It is an object to provide an X-ray inspection apparatus that makes it easy to understand the correspondence between each setting item and each setting item on the dimension setting input screen, and can easily perform dimension setting while confirming the inspection object to be actually inspected. To do.

The X-ray inspection apparatus according to claim 1 is an X-ray inspection apparatus 1 that inspects an object to be inspected W having a seal portion in at least one of the non-transparent packaging materials Wp.
Signal processing for extracting an outer shape from a transmission image when X-rays are exposed to the object to be inspected, and calculating a seal portion region S2 of the object to be inspected based on the extracted image with reference to the extracted outer shape. Means 14, display control means 21 for displaying the result of calculating the seal area of the object to be inspected on the same screen with the seal part of the X-ray transmission image of the object being inspected, and the display control It is characterized by comprising setting input means 15 for setting means.

The X-ray inspection apparatus according to claim 2 is the X-ray inspection apparatus according to claim 1, wherein the signal processing means 14 obtains an image of the contents from a transmission image when the X-ray is exposed to the inspection object. Image extracting means 17 for extracting;
The outline area extracting means 18 for extracting the outline area S1 indicating the outline from the transmission image when the inspection object is exposed to X-rays, and the outline area extracted by the outline area extracting means are set in advance. The seal portion area calculating means 19 for calculating the seal portion area S2 based on the seal portion information, and the comparison between the gray level of the image of the seal portion area and the gray level of the image of the contents of the object to be inspected results in a seal failure. It is characterized by comprising a discriminating means 20 for discriminating the presence or absence.

  The X-ray inspection apparatus according to claim 3 is the X-ray inspection apparatus according to claim 1, wherein the display control means 21 has a function of setting a conveyance direction of the inspection object.

  The X-ray inspection apparatus according to claim 4 is the X-ray inspection apparatus according to claim 2 or 3, wherein the determination means 20 determines the presence or absence of foreign substances in the contents in the contents area of the inspection object. Means 20a is provided.

  The X-ray inspection apparatus according to claim 5 is the X-ray inspection apparatus according to any one of claims 2 to 4, wherein the determination means 20 determines whether or not a content item is missing in the content area of the inspection object. It is characterized by comprising a missing item discriminating means 20b.

  According to the present invention, various settings including an X-ray transmission image of a non-defective sample (inspection object W) provided with an identifier for specifying the product size and the position and length of the seal width of the seal portion, and the product size and the seal width. Since the items are displayed as the setting input screen 30 on one screen, the correspondence between each dimension (product size, seal width, etc.) of the actually conveyed inspection object and each setting item on the setting input screen is known. It becomes easy, and it can set easily, confirming the to-be-inspected object actually inspected.

  Hereinafter, an X-ray inspection apparatus according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing an external appearance of an X-ray inspection apparatus according to the present invention, FIG. 2 is a schematic plan view showing an example of an inspection object to be detected by the X-ray inspection apparatus, and FIG. 4 is a block diagram showing an electrical configuration, FIG. 4 is a diagram showing an example of a setting input screen displayed on the display of the X-ray inspection apparatus, and FIG. 5 is for extracting an outline region of the inspection object in the X-ray inspection apparatus. FIG. 6 is a block diagram showing another configuration example of the discriminating means in FIG. 3.

  The X-ray inspection apparatus 1 (1A, 1B) of this example is provided in a part of a transport line, and is a dimension of a seal portion of an inspection object W having a seal portion on at least one side that is sequentially transported at a predetermined interval. And the presence or absence of a seal portion failure due to the biting of the contents or the presence or absence of foreign matter in the inspection object W is inspected.

  In particular, the X-ray inspection apparatus 1 of the present example has a seal portion Ws (on the four sides indicated by broken lines in FIG. 2) in an inspection object W such as a poultice or a seasoning using a non-transparent packaging material Wp that is difficult to transmit light. Suitable for detecting defects in the frame-like part).

  In the X-ray inspection apparatus 1 </ b> A shown in FIG. 1, the transport unit 2 and the foreign matter detection unit 3 are provided inside the apparatus main body 4, and the display 5 is provided at the upper front of the apparatus main body 4.

  The conveyance unit 2 sequentially conveys the same type of inspection object W at a constant speed with a predetermined interval. This conveyance part 2 can be comprised with the belt conveyor arrange | positioned horizontally with respect to the apparatus main body 4, for example. The conveyance unit 2 directs the inspection object W carried in from the carry-in port 7 at a predetermined conveyance speed set in advance by driving of the drive motor 6 shown in FIG. 1 toward the carry-out port 8 side (carrying direction X in the drawing). Transport.

  The foreign matter detection unit 3 detects the defect of the seal portion Ws and the presence or absence of foreign matter in the middle of the conveyance path of the inspection object W to be conveyed, and generates X-rays provided above the conveyance unit 2 at a predetermined height. And an X-ray detector 10 provided opposite to the X-ray generator 9 in the transport unit 2.

  The X-ray generator 9 has a configuration in which a cylindrical X-ray tube 12 provided in a metal box 11 is immersed in insulating oil (not shown), and an electron beam from the cathode of the X-ray tube 12 is an anode target. X-rays are generated by irradiation. The X-ray tube 12 is provided in a direction (Y direction) whose longitudinal direction is orthogonal to the conveyance direction X of the inspection object W. The X-rays generated by the X-ray tube 12 are exposed to the lower X-ray detector 10 in the form of a substantially triangular screen by a slit (not shown) along the longitudinal direction.

  The X-ray detector 10 detects X-rays transmitted through the inspection object W when the X-rays are exposed to the inspection object W, and according to the detected amount of X-ray transmission. An electrical signal is being output. The X-ray detector 10 is provided along the Y direction orthogonal to the transport direction X of the inspection object W transported on the transport unit 2. The X-ray detector 10 uses an array line sensor including a plurality of photodiodes arranged in a line and a scintillator provided on the photodiode.

  As shown in FIG. 3, position detection means 13 for detecting the passage of the inspection object W is provided on the carry-in entrance 7 side of the transport unit 2. The position detecting means 13 is configured by a photosensor including a pair of light projecting and receiving devices provided on the entrance side of the belt conveyor as the transport unit 2. With this configuration, an ON signal is input from the position detection unit 13 to the signal processing unit 14 as a timing signal while the inspection object W passes in front of the photosensor.

  In the X-ray detector 10 having such a configuration, X-rays are exposed from the X-ray generator 9 to the inspection object W transported on the transport unit 2. Then, the X-ray transmitted through the inspection object W with the X-ray exposure to the inspection object W is received by the scintillator and converted into light. The light converted by the scintillator is received by a photodiode disposed under the scintillator. Each photodiode converts the received light into an electrical signal and outputs it. The X-ray detector 10 outputs an electric signal having a level corresponding to the intensity of the received X-ray to the signal processing means 14.

  In FIG. 3, the signal processing means 14 includes a CPU, a memory, and the like, and after a predetermined time using the ON signal when the position detection means 13 detects the inspection object W as a timing signal, the X-ray detector 10. Various signal processing is performed by taking in electrical signals from

  As shown in FIG. 3, the signal processing means 14 includes a setting input means 15, a storage means (data memory) 16, an image extraction means 17, an outline area extraction means 18, a seal area calculation means 19, a determination means 20, and display control. Means 21 are provided.

  The setting input means 15 includes a plurality of keys and switches operated by a user for giving various settings and instructions regarding selection of a setting input mode, which will be described later, and inspection and display of the seal portion Ws on the inspection object W. The setting input unit 15 sets the conveyance direction of the inspection object W when the setting input mode to be described later is selected and the setting input screen 30 of FIG. W product size (product size parallel to the flow direction, product size perpendicular to the flow direction), width dimension of the seal portion Ws (for example, if the outer shape is a rectangular shape, the dimension going inward from the four sides of the outer shape), etc. It is the structure which inputs a numerical value suitably.

  Further, in addition to the above settings, the setting input means 15 sets a detection limit value as a reference for determining the setting of the conveyance speed of the conveyance unit 2 and the presence or absence of a seal failure in the seal portion Ws of the inspection object W. Yes. Further, the setting input means 15 sets detection limit values that serve as a reference for determining the presence or absence of foreign matter in the inspected object W and the presence or absence of missing contents when performing a plurality of inspections to be described later. It is possible. These detection limit values are appropriately set according to the type of the inspection object W, the type of foreign matter to be detected, and the like.

  The storage means 16 stores X-ray transmission data for each inspection object W (including a sample). This X-ray transmission data is obtained by A / D converting an electric signal from the X-ray detector 10 by an A / D converter (not shown). More specifically, every time one inspection object W is inspected, for example, 640 pieces of X-ray transmission data per line (Y direction) of the X-ray detector 10 are conveyed to the storage means 16 at least. A predetermined number of lines (480 lines) corresponding to the length of the inspection object W in the transport direction (corresponding to a detection period from the front end to the rear end) is stored.

  The image extraction unit 17 creates an entire grayscale image (overall image for each inspection object W (including the sample) including the belt surface of the transport unit 2) from the X-ray transmission data stored in the storage unit 16, and this A grayscale image of the content Wa is extracted from the entire grayscale image created.

  Although not shown, the signal processing means 14 includes a filter means. When the contents Wa are accommodated in the extremely thin packaging material Wp such as a poultice, for example, as the inspection object W, the storage means 16 is stored. A predetermined filtering process is applied to the X-ray transmission data of the inspection object W stored in. In this filter processing, for example, a feature extraction filter such as a differential filter (Roberts filter, Prewitt filter, Sobel filter) or a Laplacian filter is used. This enhances the entire image to facilitate edge detection, and further enhances and facilitates extraction of foreign object information and biting information to be detected.

  The outer region extraction unit 18 extracts an outer region S1 indicating the inner area from the contour of the inspection object W from the entire image based on the X-ray transmission data stored in the storage unit 16. Further, with reference to FIG. 5, the outer region extraction unit 18 first obtains the entire histogram from the X-ray transmission data stored in the storage unit 16. Then, the data D1 of the inspection object W and the data D2 other than the inspection object W (actually the belt surface of the conveyance unit 2) are divided into binary values from the obtained entire histogram. Here, the data D1 of the inspection object is set to 255, and the data D2 other than the inspection object is set to 0. Then, the binarized inspection object data D1 is extracted as the outer region S1.

  The seal area calculation means 19 calculates the seal area S2 from the outline area S1 extracted by the outline area extraction means 18. The seal area S2 is reduced by the set width dimension when the information about the seal area Ws, for example, the numerical value of the width dimension of the seal area Ws is input from the setting input means 15, the image of the extracted outline area S1. To do. Then, the reduced image is subtracted from the image of the outer region S1 to calculate the seal portion region S2. At this time, the seal width of the seal portion is calculated for each side of the inspection object.

  The discriminating means 20 compares the gray level of the image of the seal portion area S2 calculated by the seal portion calculating means 19 with the gray level of the image of the contents Wa of the inspection object W extracted by the image extracting means 17 to determine a seal failure. And a selection signal indicating whether the seal is normal or defective is output from the determination result.

  That is, in this determination means 20, when there is a light and dark level equal to or higher than the light and dark level of the image of the content Wa of the object W in the seal portion area S2, the object W has a seal failure. Discrimination is performed, and a selection signal indicating a seal failure is output externally. Note that the determination means 20 may determine the seal portion failure based on the presence or absence of an edge component in the seal portion region after the filtering process.

  The display control unit 21 includes setting input information from the setting input unit 15, an entire image of the inspection object W extracted by the image extraction unit 17, an image of the outer region S1 extracted by the outer region extraction unit 18, and a seal portion region calculation unit 19 is an image of the seal portion area S2 calculated, an X-ray transmission image when the inspection object W is viewed in plan according to the determination result of the determination means 20, the determination result of “OK” or “NG”, the total number of inspections, and the non-defective product The inspection results such as the number and the total number of NG are controlled on the display screen of the display 5.

  When the setting input mode is set from the setting input unit 15, the display control unit 21, as shown in FIG. 4, includes the entire image of the inspection object W including the seal portion area calculated by the seal portion calculation unit 19. And the setting items (including the input area) of the product size and the seal width of the inspection object W associated with the outer dimensions of the entire image and the seal area are displayed on the setting input screen 30 on one screen. The display 5 is controlled to be displayed as possible.

  FIG. 4 shows an example of a setting input screen displayed on the display of the X-ray inspection apparatus in the setting input mode. The setting input screen 30 of the display 5 shown in FIG. 4 includes an X-ray transmission image display unit 31, a flow direction setting unit 32, a product size display unit 33, an area size display unit 34, and a packaging inspection limit display unit 35 at the same time. Displayed on the screen.

  More specifically, the X-ray transmission image display unit 31 displays an X-ray transmission image (outer shape image) at the time of X-ray exposure to the inspection object (including the sample product) W. At that time, the X-ray transmission image has an identifier for specifying the position and length of the product size and the seal width (in the example of FIG. 4, the position is specified by symbols B to G, and the width is within the range indicated by the arrow. The specified identifier) is displayed at the same time. The flow direction setting unit 32 displays the flow direction of the inspection object W. In the product size display unit 33, the product size parallel to the flow direction and the product size perpendicular to the flow direction are associated with the product sizes B and C of the X-ray transmission image displayed on the X-ray transmission image display unit 31. The product width of the inspection object W is numerically displayed so that the setting can be changed. In the area size display unit 34, the seal width of each seal unit is displayed in a numerical value so that the setting can be changed in association with the seal widths D to G of each side of the X-ray transmission image displayed on the X-ray transmission image display unit 31. Is done. On the packaging inspection limit display unit 35, the detection limit value compared with the density level of the X-ray transmission image at the time of X-ray exposure to the inspection object W is numerically displayed as a packaging inspection limit so that the setting can be changed.

  In a state where the setting input mode 15 is selected by the setting input means 15 and the setting input screen 30 of FIG. 4 is displayed, an X-ray transmission image (grayscale image showing the outer shape) of the sample (non-defective product) of the inspection object W together with the identifier is displayed. The setting items displayed on the X-ray transmission image display unit 31 and displayed on the flow direction setting unit 32, the product size display unit 33, the region size display unit 34, and the packaging inspection limit display unit 35 can be changed. ing.

  When the inspection object W is inspected by the X-ray inspection apparatus 1A having the above configuration, a good sample of the inspection object W is transferred before the actual inspection object W to be inspected is transferred. Then, the setting input mode 15 is selected by the setting input means 15 to display the setting input screen 30 of FIG. In this state, on the setting input screen 30 of the display device 5, a sample X-ray transmission image (outer shape image) including identifiers of each dimension such as product size and seal width is displayed on the X-ray transmission image display unit 31. At the same time, each setting item is simultaneously displayed on one screen in the flow direction setting unit 32, the product size display unit 33, the region size display unit 34, and the packaging inspection limit display unit 35. Then, the user sets each setting item while confirming each dimension such as the product size and the seal width of the sample while the setting input screen 30 is displayed.

  In this example, since the non-defective sample is transported on the transport line before the inspection, if each setting item is set, the X-ray transmission data of the sample processed by the signal processing means 14 The product size and the seal width dimension calculated based on the above can be displayed numerically in association with the identifiers B to G of the X-ray transmission image. As a result, the value displayed numerically on each setting item on the setting input screen 30 is used as a reference value, and the user can easily change the setting of each setting item as necessary while checking a good sample using this reference value as a guide. Can be done.

  When the X-ray inspection apparatus 1A having the above-described configuration is used to inspect the actual seal portion Ws of the inspection object W, the signal processing unit 14 performs the following processing. First, an entire grayscale image (entire image including the inspection object W and the belt surface of the transport unit 2) is created from the X-ray transmission data stored in the storage means 16, and the contents are created from the created grayscale image. A gray image of Wa is extracted.

  Next, an outer region S1 indicating the inner area from the contour of the inspection object W is extracted from the whole grayscale image. In extracting the outline region S1, a histogram of the entire inspection object W as shown in FIG. 5 is obtained from the X-ray transmission data stored in the storage means 16. Subsequently, the data D1 of the inspection object W and the data D2 other than the inspection object W (the belt surface of the conveyance unit 2) are divided into binary values from the obtained entire histogram. FIG. 5 shows an overall histogram in which the poultice is the inspection object W. In this entire histogram, the data D1 of the inspection object W is set to 255, the data D2 other than the inspection object W is set to 0, and the data is displayed. It is binarized. Of the binarized data, the data D1 of the inspection object W is extracted as the outer region S1.

  When the outer region S1 is extracted, the seal portion region S2 is calculated from the outer region S1. The calculation of the seal portion area S2 is performed based on setting information related to the seal portion Ws set from the setting input unit 15 on the setting input screen 30 in FIG. That is, when the numerical value of the width dimension of each seal portion Ws is input from the setting input unit 15 on the setting input screen 30 of FIG. 4, the image of the extracted outer region S1 is reduced by the width dimension set and input. Then, the reduced image is subtracted from the image of the outer region S1 to calculate the seal portion region S2.

  When the seal portion area S2 is calculated as described above, the discrimination means 20 outputs a selection signal according to the discrimination of the inspection object in the seal portion area to the outside.

  By the way, in X-ray inspection apparatus 1 (1A, 1B) of this example of each form mentioned above, X-ray | X_line is irradiated to to-be-inspected object W in parallel with the test | inspection of the seal | sticker part Ws of to-be-inspected object W. From the amount of X-ray transmission, an inspection for the presence or absence of foreign matter in the inspected object W (foreign matter inspection) and an inspection for the presence or absence of missing contents (out of stock inspection) are also performed. FIG. 6 shows the configuration of the discrimination means at that time. Since the other configuration of the X-ray inspection apparatus provided with the discrimination means of FIG. 6 is the same as that of FIG. 3, the description thereof is omitted.

  The discriminating means 20 shown in FIG. 6 includes a foreign matter discriminating means 20a for discriminating the presence / absence of foreign matter in the contents of the inspection object W in addition to the above-described determination of the presence / absence of the seal portion, and a missing item in the contents of the inspection subject W And a shortage determining means 20b for determining the presence or absence of the item.

  When inspecting the presence or absence of foreign matter in the inspected object W, the foreign matter discriminating means 20a determines, in the content area of the inspected object W, a portion having a different density level in the content area as a foreign object. . More specifically, the foreign matter determination means 20a includes the density level of the X-ray transmission data of the contents area of the inspection object W extracted by the image extraction means 17, and the foreign matter detection limit value preset by the setting input means 15. When the X-ray transmission data exceeds the foreign object detection limit value, it is determined that the foreign object is mixed in the inspection object W. The foreign object detection limit value can be set from the setting input unit 15 as appropriate for each inspection object W according to the contents.

  When inspecting the presence or absence of a missing item in the inspected object W, the missing item determining means 20b has a density level lower than a preset missing item detection limit value in the content area of the inspected object W (X-ray transmission). When the amount is large), it is determined that, for example, the number of poultices in the packaging material Wp has decreased. In addition, the shortage determination means 20b uses a preset shortage detection mask area, and according to the area where the density level equivalent to the content exists for each content area of the shortage detection mask area. The presence or absence of contents is determined. It should be noted that the shortage detection limit value and the shortage detection mask area can be set and input from the setting input unit 15 as appropriate for each inspection object W according to the contents.

  The discrimination means 20 is not limited to the comparison between the level of the grayscale image and the foreign object detection limit value, but is compared with the set foreign object detection limit value for an image in which the filtered foreign object information is emphasized. The presence or absence of foreign matter may be determined.

  Thus, in the X-ray inspection apparatus of this example, if the configuration is to inspect whether there is a defect in the seal portion Ws of the inspection object W, whether there is a foreign substance in the content Wa, or whether there is a shortage in the content Wa, Different inspection items can be performed with one apparatus, and the number of facilities can be reduced.

  Then, according to the X-ray inspection apparatus of this example, the X-ray transmission image and the product size of a non-defective sample (inspection object W) provided with identifiers for specifying the product size and the position and length of the seal width of the seal portion And various setting items including the seal width are displayed as the setting input screen 30 on one screen, so that each dimension (product size, seal width, etc.) of the actually inspected object and each setting on the setting input screen Correspondence with items becomes easy to understand, and settings can be easily performed while checking an object to be actually inspected. In addition, since the setting input screens are combined into one, it is not necessary to alternately display the X-ray transmission image and the width dimension display screen of the object to be inspected, and the setting work time can be reduced.

  Further, the X-ray transmission image (outer shape image) displayed on the setting input screen 30 is given an identifier for specifying the product size and the position and length of the seal width of the seal portion, and is associated with each identifier. Since each setting item is displayed on the same setting input screen 30, it is possible to accurately and easily grasp the position of the product size and the seal portion by looking at the identifier of the X-ray transmission image. . Thereby, even when a user unfamiliar with the apparatus makes settings, it is possible to reduce setting input mistakes for each setting item. As a result, even products having different width dimensions on each side of the seal portion or products having different loading directions at the time of inspection can be accurately inspected, and the reliability of various inspection results can be improved.

  By the way, in the above-mentioned form, on the setting input screen 30 in FIG. 4, the X-ray transmission image when the sample is conveyed is displayed together with the identifier. Information on the outer shape image of the inspection object to which an identifier for specifying the position and length such as the seal width is assigned is stored in the storage means 16 in advance, and is specified by the setting input means 15 (for example, the inspection object name). A configuration may also be adopted in which the data is read from the storage unit 16 and displayed on the screen together with the setting items on the setting input screen 30 in the setting input mode.

It is a perspective view which shows the external appearance of the X-ray inspection apparatus by this invention. 1 is a schematic plan view of an inspection object that is a detection target of an X-ray inspection apparatus according to the present invention. It is a block diagram which shows the electric constitution of the X-ray inspection apparatus by this invention. It is a figure which shows an example of the setting input screen displayed on the indicator of the X-ray inspection apparatus by this invention. It is the schematic which shows the histogram of the whole image of the to-be-inspected object used when extracting the external shape area | region of to-be-inspected object in the X-ray inspection apparatus by this invention. It is a block diagram which shows the other structural example of the discrimination | determination means of FIG. It is a figure which shows an example of the setting input screen displayed on the indicator of the conventional X-ray inspection apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 X-ray inspection apparatus 5 Indicator 14 Signal processing means 17 Image extraction means 18 Outline area extraction means 19 Seal part area | region calculation means 20 Discrimination means 20a Foreign object discrimination means 20b Missing goods discrimination means 30 Setting input screen W Inspected object Wa Contents Ws Sealing part Wp Packaging material

Claims (5)

In the X-ray inspection apparatus (1) for inspecting an object to be inspected (W) having a seal part (Ws) on at least one side in which the content (Wa) is accommodated in a non-transparent packaging material (Wp),
A setting for setting at least the product size and the seal width of the seal part together with the outline image of the object to be inspected to which the identifier specifying the product size of the object to be inspected and the position and length of the seal width of the seal part is provided. An X-ray examination apparatus comprising display control means (21) for controlling display of an item on one screen of the display (5) in association with the identifier. An outline is extracted from an X-ray transmission image when a sample of the object to be inspected (W) is conveyed and X-rays are irradiated, and the seal of the sample is based on the extracted image on the basis of the extracted outline. Comprising signal processing means (14) for calculating the partial area (S2);
The said display control means (21) displays numerically the seal width of the said seal | sticker part (Ws) on the setting item corresponding based on the seal | sticker part area | region calculated by the said signal processing means, The said setting part is a numerical value display. X-ray inspection equipment. The signal processing means (14) includes an image extraction means (17) for extracting an image of contents from a transmission image when the inspection object is exposed to X-rays;
An outline area extracting means (18) for extracting an outline area (S1) indicating an outline from a transmission image when the inspection object is exposed to X-rays;
Seal part area calculating means (19) for calculating a seal part area (S2) based on seal part information set in advance with reference to the outline area extracted by the outline area extracting means;
3. A discriminating means (20) for discriminating whether or not there is a sealing failure by comparing a gray level of an image of the seal portion area with a gray level of an image of the contents of the inspection object. The X-ray inspection apparatus described. 4. The X-ray inspection apparatus according to claim 3, wherein the discrimination means (20) comprises foreign matter discrimination means (20a) for discriminating the presence or absence of foreign matter in the contents in the content area of the inspection object. . 4. The X-ray according to claim 3, wherein the discriminating means (20) comprises a missing item discriminating means (20b) for discriminating the presence or absence of a missing item in the content area of the inspection object. Inspection device.