JP6785609B2 - X-ray inspection equipment and X-ray inspection method - Google Patents

Description

The present invention is an X-ray inspection apparatus and an X-ray inspection apparatus that irradiates a transported object to be inspected with X-rays and inspects a defective seal portion of the inspected object by using a transmitted image of the X-rays when the X-rays are irradiated. Regarding the line inspection method.

The X-ray inspection device is a device that inspects an inspected object using, for example, raw meat, fish, processed foods, pharmaceuticals, etc., and an X-ray transmission image when the inspected object is irradiated with X-rays. Traditionally known as.

Then, as this kind of X-ray inspection apparatus, for example, in the X-ray inspection apparatus disclosed in Patent Document 1 below, the outer shape is extracted from the transmitted image when the X-ray is exposed to the inspected object, and the extracted outer shape is extracted. The seal portion area of the object to be inspected is calculated based on the seal portion information set in advance, and the seal portion defect is inspected using the density level of the image of the calculated seal portion region.

JP-A-2005-024549

By the way, as an object to be inspected by this kind of X-ray inspection apparatus, a product such as a stand pouch is known. When an X-ray inspection device is used to inspect this type of product as an object to be inspected, the contents are filled through the upper opening of a bag-shaped packaging material held at a predetermined height at predetermined intervals, and then the upper part is used. A product with a sealed opening (object to be inspected) is dropped onto a conveyor of an X-ray inspection device and carried in. However, when a product having one side of the packaging material as a seal portion is dropped onto the conveyor of the X-ray inspection device as an object to be inspected and carried in, the orientation of the seal side of the object to be inspected is not constant on the conveyor. The transport posture is not stable. Therefore, in the X-ray inspection apparatus of Patent Document 1 described above, the seal portion information set in advance is set with reference to the outer shape extracted from the transmission image for the object to be inspected in which the orientation of the seal side is not stable. There is a problem that the seal portion area cannot be calculated and specified based on the above.

Therefore, the present invention has been made in view of the above problems, and the sealed portion area of the object to be inspected, in which one side of the opening of the bag-shaped packaging material is sealed after filling the contents, is left and right in the carry-in direction. It is an object of the present invention to provide an X-ray inspection apparatus and an X-ray inspection method that can be specified without being used.

In order to achieve the above object, in the X-ray inspection apparatus according to claim 1 of the present invention, the opening is sealed after the content Wb is filled from the opening forming one side of the bag-shaped packaging material Wa. An X-ray inspection apparatus 1 for inspecting an inspected object by irradiating X-rays while transporting the inspected object W at predetermined intervals and using a transmission image transmitted through the inspected object.
Identify a seal-area S3 where the opening is sealed on the basis of the offset information of the contents against external region S1 and the external-type region of said extracted from the transmitted image packaging material, the sealing portion in the region It is characterized by including a signal processing unit 6 for determining the presence or absence of a defective seal portion.

The X-ray inspection apparatus according to claim 2 is the X-ray inspection apparatus according to claim 1.
The offset information is the center of gravity G1 of the content Wb.

The X-ray inspection apparatus according to claim 3 is the X-ray inspection apparatus according to claim 2.
A straight line toward the center of gravity G2 of the front Kigai shaped regions S1 from the center of gravity G1 of the contents of Wb and spindle Z1, and identifies the seal portion-area S3 sides intersecting the main axis as the sealing edge S3a.

The X-ray inspection apparatus according to claim 4 is the X-ray inspection apparatus according to claim 2.
And wherein a straight line toward the intersection of diagonal lines G3 before Kigai shaped regions S1 from the center of gravity G1 of the contents of Wb and the main shaft Z2, specifying the seal portion-area S3 sides intersecting the main axis as a sealing edge S3a To do.

The X-ray inspection apparatus according to claim 5 is the X-ray inspection apparatus according to claim 2.
And identifies the seal portion-area S3 the content side connecting two vertices long distance from the center of gravity G1 to the top of the front Kigai type region S1 of Wb as a seal edge S3a.

The X-ray inspection apparatus according to claim 6 is the X-ray inspection apparatus according to claim 2.
When the sealing edge in front Kigai type region S1 is a short side, a straight line one end of the long side is parallel moved so that the position of the center of gravity G1 of the contents of Wb and spindle Z3, the contents and intersecting the main axis The seal portion region S3 is specified by using the shorter side having a longer distance from the center of gravity of the object as the seal side S3a.

The X-ray inspection method according to claim 7 transports the inspected object W whose opening is sealed after the content Wb is filled from the opening forming one side of the bag-shaped packaging material Wa at predetermined intervals. This is an X-ray inspection method in which an X-ray is irradiated while the subject is irradiated and the subject is inspected using a transmitted image transmitted through the subject.
A step of said opening to identify the seal region S3, which is sealed on the basis of the offset information of the contents against external region S1 and the external-type region of said extracted from the transmitted image packaging material,
It is characterized by including a step of determining the presence or absence of a defective seal portion in the specified seal portion region.

According to the present invention, one side of the opening of the bag-shaped packaging material is sealed after filling the contents by utilizing the characteristic that the contents to be filled in the packaging material of the object to be inspected are biased to the side opposite to the sealing portion side. The object to be inspected is conveyed in random directions, and even if the conveying posture of the object to be inspected is disturbed, the seal portion region can be reliably specified.

It is a block diagram which shows the schematic structure of the X-ray inspection apparatus which concerns on this invention. It is a schematic flowchart in the case of specifying the seal part region of an object to be inspected using the X-ray inspection apparatus which concerns on this invention. (A) It is a schematic block diagram of the object to be inspected. (B) It is a figure which shows an example of the coordinates of the transmission image of an object to be inspected. (A)-(d) It is explanatory drawing which shows the specific example in the case of specifying the seal part region of the object to be inspected using the X-ray inspection apparatus which concerns on this invention.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the attached drawings.

The X-ray inspection apparatus according to the present invention is incorporated into, for example, a part of a transport line, and for an object (article) to be inspected that is sequentially transported at regular intervals, to a seal portion of the contents packaged in a packaging material. This is to inspect the presence or absence of defective seals due to biting of the seal.

As shown in FIG. 3A, the object to be inspected is filled with the content Wb from the upper opening forming one side of the bag-shaped (rectangular) packaging material Wa, and the upper opening is sealed to seal the seal portion Wc. Is formed, for example, various pouch products including stand pouches are targeted for inspection.

As shown in FIG. 1, the X-ray inspection device 1 of the present embodiment includes a transfer device 2, an X-ray generator 3, an X-ray detector 4, a setting input unit 5, a signal processing unit 6, and a display unit 7. The seal portion defect inspection of only one side of the bag-shaped packaging material Wa of the object W to be inspected, that is, the seal in the seal portion region of the seal portion Wc on one side of the opening filled with the contents Wb. Inspect for defective parts.

The transport device 2 sequentially transports the object W to be inspected on the transport path at predetermined intervals, and is composed of, for example, a belt conveyor arranged horizontally with respect to the main body of the device.

The belt conveyor 2 as a transport device includes a transport belt 2a made of a material (an element other than an element having a large atomic weight) that easily transmits X-rays, and is a transport control means (not shown) when inspecting the object W to be inspected. The conveyor belt 2a is driven at a transfer speed set in advance by the setting input unit 5 by the rotation of the drive motor M based on the control of. As a result, the object W to be inspected carried in from the carry-in port is conveyed toward the carry-out port side in the transport direction X in FIG.

The X-ray generator 3 irradiates an inspected object W transported on a transport path in a transport direction X from a carry-in inlet to a carry-out outlet with X-rays, and targets electrons accelerated by applying a voltage. It has a cylindrical X-ray tube that is struck to generate X-rays, and an irradiation slit for irradiating the X-rays generated by the X-ray tube toward the X-ray detector 4.

The X-ray tube has, for example, a structure in which a cylindrical X-ray tube provided inside a metal box is immersed in insulating oil, and an electron beam from the cathode of the X-ray tube is applied to the anode target to emit X-rays. Generate. The X-ray tube is provided in a direction in which its longitudinal direction is orthogonal to the plane of the transport direction of the object W to be inspected (X direction in FIG. 1), and the generated X-rays are directed toward the lower X-ray detector 4. , A screen-like irradiation is performed by an irradiation slit along the longitudinal direction.

In the X-ray detector 4, a plurality of elements are arranged in a straight line in a direction orthogonal to the transport direction X on the plane of the transport direction X of the object to be transported W to be transported. More specifically, the X-ray detector 4 is configured in an array with a plurality of photodiodes arranged in a line and a scintillator provided on the line photodiode.

The X-ray detector 4 detects X-rays transmitted through the object W to be inspected and the transport belt 2a by a plurality of elements (array of photodiode and scintillator), and uses the detected detection data for a plurality of elements for each element. It is sequentially output to the signal processing unit 6 as one line, and the output is sequentially repeated as the inspected object W is conveyed.

The setting input unit 5 is composed of, for example, a key, a push button, a switch, and a soft key on the display screen of the display unit 7 provided in the main body of the device. The setting input unit 5 sets a threshold value and a content area S2 for extracting the outer shape area S1 of the object W to be inspected shown in FIGS. 3B and 4 when inspecting the defective seal portion of the object W to be inspected. Signal processing by appropriately setting the threshold value for extraction and the detection limit value that serves as a criterion for determining the defective seal portion based on the presence or absence of an abnormal portion in the seal portion region S3 according to the type of the object W to be inspected and the type of foreign matter. It is operated when storing in the storage means 11 described later in part 6.

Further, the setting input unit 5 sets the transport speed of the transport belt 2a of the transport device 2, and the width dimension of the seal portion Wc applied to one side of the object W to be inspected (if the outer shape is square, any one of them). Various information related to the seal portion Wc such as the dimension from the end side to the inside, and the dimension from one long end side or one short end side to the inside if the outer shape is rectangular) is set, and the signal processing unit 6 It is operated when storing in the storage means 11.

As shown in FIG. 1, the signal processing unit 6 includes a storage means 11, an outer shape area extraction means 12, a content area extraction means 13, a seal part area identification means 14, and a seal part defect determination means 15.

The storage means 11 stores the X-ray transmission data for each inspected object W from the X-ray detector 4. The X-ray transmission data is obtained by A / D converting an electric signal from the X-ray detector 4 by an A / D converter (not shown). More specifically, each time the storage means 11 inspects one inspected object W, at least several hundreds of X-ray transmission data are conveyed per one line (Y direction) of the X-ray detector 4. Only a predetermined number of lines (for example, several hundred lines) corresponding to the length of the object W to be inspected W in the transport direction (corresponding to the detection period from the front end to the rear end) are stored.

The external region extraction means 12 includes an entire transmitted image (including the object W to be inspected and the belt surface) having a density level corresponding to a shading value that is lighter as the amount of transmission increases from the X-ray transmission data stored in the storage means 6a. An image) is created, and a transparent image having a density level equal to or higher than the threshold value set in the setting input unit 5 is obtained from the created transparent image of the outer area of the packaging material Wa (the object W to be inspected shown in FIG. 3B). Extract as S1) (region showing the inner area from the contour).

The external region extraction means 12 obtains an overall density histogram of the entire transmitted image created from the X-ray transmission data stored in the storage means 6a, and the data of the object W to be inspected and the object to be inspected are obtained from the obtained density histogram. The data was divided into data other than W (belt surface) and binarized. For example, in the overall density histogram, the data of the inspected object was set to 255 and the data other than the inspected object was set to 0, and the data was binarized and binarized. Of the data, the data of the object to be inspected W can be extracted as the outer shape region S1 of the packaging material Wa.

The content area extraction means 13 uses the threshold value set by the setting input unit 5 to obtain a transparent image having a density level exceeding the threshold value from the transparent image in the external region S1 and the content corresponding to the content Wb of the object W to be inspected. It is extracted as an object region (hatched portion shown in FIG. 3B) S2. Further, the content region extraction means 13 corresponds to the content Wb of the object W to be inspected with a transmission image having a density level exceeding the threshold value set by the setting input unit 5 in parallel with the extraction process of the external region S1. It may be extracted as the content area S2.

The seal portion area specifying means 14 calculates the offset information of the contents Wb of the transmitted image based on the outer shape area S1 extracted by the outer shape area extraction means 12 and the contents area S2 extracted by the contents area extraction means 13. The offset information calculating means 14a is provided, and the seal portion region S3 is specified based on the offset information of the content Wb and the outer shape region S1 of the packaging material Wa.

The offset information calculation means 14a uses a binary image binarized in a predetermined density range equal to or greater than the threshold value for extracting the outer shape region S1 as the content region S2, and from the coordinate positions of each pixel of the content region S2. The center of gravity G1 of the content Wb is obtained (area), and the obtained center of gravity G1 is used as the biased information of the content Wb.

The offset information calculation means 14a is obtained by binarizing the external region S1 in a predetermined density range equal to or greater than the threshold value for extracting the external region S1 from the coordinate position and density of each pixel of the content region S2 to obtain the center of gravity of the content Wb. G1 may be obtained (corresponding to the volume), and the obtained center of gravity G1 may be used as biased information of the content Wb.

The seal portion area specifying means 14 calculates the center of gravity G2 of the outer shape area S1 of the transmitted image from the coordinate positions of each pixel of the outer shape area S1 extracted by the outer shape area extraction means 12 (area). Further, the seal portion region specifying means 14 calculates the center G3 of the outer region region S1 of the transmitted image as the intersection of diagonal lines from the coordinate positions of the vertices of the outer shape region S1.

Then, the seal portion region specifying means 14 has a straight line from the center of gravity G1 of the content Wb calculated by the offset information calculating means 14a toward the center of gravity G2 of the outer region S1 of the transmitted image as the main axis, and the outer region intersects the main axis. One side of S1 is calculated as the seal side S3a, and the seal portion region S3 is specified from the calculated seal side S3a and the width dimension of the seal portion Wc set by the setting input unit 5.

Further, the seal portion region specifying means 14 has a straight line from the center of gravity G1 of the content Wb calculated by the offset information calculating means 14a toward the intersection G3 of the diagonal lines of the outer region S1 of the transmitted image as the main axis, and intersects the main axis. One side of the outer shape region S1 may be calculated as the seal side S3a, and the seal portion region S3 may be specified from the calculated seal side S3a and the width dimension of the seal portion Wc set by the setting input unit 5.

Further, the seal portion area specifying means 14 sets a side connecting two vertices having a long distance from the center of gravity G1 of the content Wb calculated by the offset information calculating means 14a to the apex of the outer region S1 of the transmitted image. It may be calculated as S3a, and the seal portion region S3 may be specified from the calculated seal side S3a and the width dimension of the seal portion Wc set by the setting input unit 5.

Further, when the seal side is the short side in the outer region S1 of the transparent image extracted by the outer region region extraction means 12, one end of the long side is calculated by the offset information calculation means 14a. A straight line that has been moved in parallel so as to be at the position of the center of gravity G1 of the contents is used as the main axis, and one side of the outer region S1 that intersects the main axis is calculated as the seal side S3a, and the calculated seal side S3a and the setting input unit 5 are used. The seal portion region S3 may be specified from the width dimension of the seal portion Wc set in the above.

The seal portion area specifying means 14 rotates the region according to the width dimension of the seal portion Wc set by the setting input unit 5 by affine transformation (converting using a 3 × 3 matrix) so that the seal sides match. , The seal portion region S3 may be specified by superimposing the transparent image acquired by translating the image. As a result, it is not necessary to perform affine transformation of the entire image of the object W to be inspected, so that the processing time can be shortened.

Further, the offset information calculation means 14a determines the offset of the contents by comparing the density (average) inside each vertex or side of the outer region S1 with the density inside the opposite vertex or side. By this determination, the degree of deviation of the contents may be calculated as the deviation information.

Further, the offset information calculation means 14a can also calculate the position of the region having the highest density level in the content region S2 of the transparent image as the offset position. In this case, the seal portion area specifying means 14 has the same length as the seal portion Wc set by the setting input unit 5 among the sides of the outer shape region S1 farthest from the offset position calculated by the offset information calculation means 14a. The side is calculated as the seal side S3a, and the seal portion region S3 is specified from the calculated seal side S3a and the width dimension of the set seal portion Wc.

The seal portion defect determining means 15 extracts, for example, the outer shape region S1 as information for determining the seal portion defect set by the setting input unit 5 with respect to the seal portion region S3 specified by the seal portion region specifying means 14. A threshold value larger than the threshold value is used, and the presence or absence of a seal portion defect is determined based on whether or not a concentration level exceeding this threshold value is within the seal portion region S3.

The display unit 7 is composed of a display device such as a liquid crystal display, and is a flat surface of the entire image of the object W to be inspected including the outer shape area S1, the content area S2, and the seal area S3, and the object W to be inspected based on the discrimination result. The viewed X-ray transmission image, the pass / fail judgment result of "OK" or "NG", the total number of inspections, the number of non-defective products, the total number of NGs, and other inspection results are displayed on the display screen based on the operation of the setting input unit 5.

Then, when the seal portion region S3 of the object W to be inspected is specified by using the X-ray inspection apparatus 1 configured as described above, it is first stored in the storage means 11 as shown in the flowchart of FIG. The outer shape region S1 of the packaging material of the object to be inspected W is extracted by the outer shape region extraction means 12 from the transmission image obtained by the X-ray transmission data (ST1). Further, the content area S2 is extracted by the content area extraction means 13 from the transmitted image based on the X-ray transmission data stored in the storage means 11 (ST2). Further, the offset information calculation means 14a calculates the offset information (center of gravity G1 of the content Wb) of the content region S2 with respect to the outer region region S1 from the transmitted image by the X-ray transmission data stored in the storage means 11 (ST3). ). Then, the seal portion region S3 is specified by the seal portion region specifying means 14 based on the calculated offset information of the content region S2 and the outer shape region S1 of the packaging material Wa of the object W to be inspected (ST4).

Next, as a specific example (Examples 1 and 2) of the method of specifying the seal portion region S3 by the seal portion region specifying means 14 described above, as shown in FIG. 3B, the rectangular outer region S1 A case where a transparent image in which the content region S2 is biased on the side BC is extracted will be described with reference to FIGS. 4 (a) and 4 (b) as an example.

In the extracted transparent image, of the four vertices, the highest vertex is A, and each vertex is B, C, and D in the counterclockwise direction. Further, the x-coordinate of the vertex B is 0, the y-coordinate of the vertex C is 0, and the coordinates of the vertices A, B, C, and D are A: (x1, y1), B: (0, y2), C :( x3,0), D: (x4, y4).

[Example 1] ... Example of specifying the seal side S3a using the center of gravity G2 of the outer region S1 In FIG. 4 (a), from the coordinates of the vertices A, B, C, and D, of each side AB, BC, CD, DA. Calculate the linear equation. Further, the equation of the main axis Z1 by a straight line is obtained from the coordinates of the two centers of gravity G1 and G2 of the center of gravity G1 of the content Wb and the center of gravity G2 of the outer region S1. Next, the intersection of the main axis Z1 and each side AB, BC, CD, DA is obtained from the simultaneous equations of the linear equations of the respective sides AB, BC, CD, and DA and the equation of the main axis Z1. In the example of FIG. 4A, the intersection P1 of the main axis Z1 and the side BC can be obtained from the simultaneous equations of the straight line equation of the side BC and the equation of the main axis Z1, and from the simultaneous equations of the straight line of the side DA and the equation of the main axis Z1. The intersection P2 between the main axis Z1 and the side DA can be obtained. Then, among the obtained intersections, the side having the intersection from the center of gravity G1 of the content Wb to the center of gravity G2 of the outer region S1 is specified as the seal side S3a. In the example of FIG. 4A, the side DA having the intersection P2 near the center of gravity G2 of the outer region S1 from the center of gravity G1 of the content Wb is specified as the seal side S3a.

In the above description of Example 1, the straight line passing through the two points of the two centers of gravity G1 and G2 is set as the main axis Z1, but the straight line from the center of gravity G1 to the center of gravity G2 is set as the main axis Z1. The side intersecting with may be specified as the seal side S3a.

[Example 2] ... Example of specifying the seal side S3a using the center G3 of the outer region S1 In FIG. 4B, the equations of the straight lines of the diagonal lines AC and BD are calculated from the coordinates of the vertices A, B, C, and D. Then, the intersection of the diagonal lines AC and BD is calculated from the equation of the straight line of the diagonal lines AC and BD, and this intersection is set as the center G3 of the outer region S1. Further, the equations of the straight lines of the sides AB, BC, CD, and DA are calculated from the coordinates of the vertices A, B, C, and D. Next, the equation of the main axis Z2 by a straight line is obtained from the coordinates of the center of gravity G1 of the content Wb and the coordinates of the center G3 of the outer region S1. Next, the intersection of the main axis Z2 and each side AB, BC, CD, DA is obtained from the simultaneous equations of the linear equations of the respective sides AB, BC, CD, and DA and the equation of the main axis Z2. In the example of FIG. 4B, the intersection P3 of the main axis Z2 and the side BC can be obtained from the equation of the straight line of the side BC and the equation of the main axis Z2, and the equation of the straight line of the side DA and the equation of the main axis Z2 of the main axis Z2 and the side DA. The intersection P4 is obtained. Then, among the obtained intersections, the side having the intersection located near the center G3 of the outer shape region S1 from the center of gravity G1 of the content Wb is specified as the seal side S3a. In the example of FIG. 4B, the side DA having an intersection near the center G3 of the outer region S1 from the center of gravity G1 of the content Wb is specified as the seal side S3a.

In the explanation of Example 2 described above, the straight line passing through the two points of the center of gravity G1 of the content Wb and the center G3 of the outer region is defined as the main axis Z2, but from the center of gravity G1 to the center G3 of the outer region from the center of gravity G1. The straight line to be directed may be specified as the main axis Z2, and the side intersecting the main axis Z2 may be specified as the seal side S3a.

Next, as a specific example (Examples 3 and 4) of the method of specifying the seal portion region S3 by the seal portion region specifying means 14, as shown in FIG. 4C, the side DA of the rectangular outer region S1 A case where a transparent image in which the content region S2 is biased is extracted in (the short side opposite to Examples 1 and 2) will be described with reference to FIGS. 4 (c) and 4 (d).

In the extracted transparent image, of the four vertices, the highest vertex is A, and each vertex is B, C, and D in the counterclockwise direction. Further, the x-coordinate value of the vertex B is 0, the y-coordinate value of the vertex C is 0, and the coordinates of the vertices A, B, C, and D are A: (x1, y1), B: (0, y2). , C: (x3,0), D: (x4, y4).

[Example 3] ... Example of specifying the seal side S3a using the distance to the vertices In FIG. 4 (c), the coordinates of the vertices A, B, C, and D and the coordinates of the center of gravity G1 of the contents Wb are used. The lengths AG1, BG1, CG1, DG1 from the vertices A, B, C, and D to the center of gravity G1 of the content Wb are obtained. Next, of the obtained lengths AG1, BG1, CG1, and DG1, the side connecting the two longer vertices is specified as the seal side S3a. In the example of FIG. 4C, the two longer vertices B and C of the lengths AG1, BG1, CG1 and DG1 from the respective vertices A, B, C and D to the center of gravity G1 of the content Wb are connected. The apex BC is specified as the seal side S3a.

[Example 4] ... Example of specifying the seal side S3a using the long side In FIG. 4 (d), the lengths of the sides AB, BC, CD, and DA are obtained from the coordinates of the vertices A, B, C, and D. .. Further, among the sides AB, BC, CD, and DA for which the length has been obtained, the equation is obtained with the straight line having the same inclination as the long sides AB and CD and passing through the coordinates of the center of gravity G1 of the content Wb as the main axis Z3. Next, the intersection is obtained from the equations of the straight lines of the short sides BC and DA and the simultaneous equations of the equations of the main axis Z3. In the example of FIG. 4D, the intersection P5 can be obtained from the simultaneous equations of the straight line of the short side BC and the equation of the main axis Z3, and the intersection P6 can be obtained from the simultaneous equations of the straight line of the short side DA and the equation of the main axis Z3. .. Then, the shorter side having a longer distance between the obtained intersection and the center of gravity G1 of the content Wb is specified as the seal side S3a. In the example of FIG. 4D, the short side BC having the intersection P5 having a long distance from the center of gravity G1 of the content Wb is specified as the seal side S3a.

As described above, the X-ray inspection apparatus 1 of the present embodiment utilizes the characteristic that the content Wb filled in the packaging material Wa of the object W to be inspected is biased to the side opposite to the seal portion Wc side, and is packaged in a bag shape. One side of the opening of the material Wa is sealed after filling the contents Wb. The object W to be inspected is conveyed in a random direction with respect to the transfer belt 2a of the transfer device 2, and the transfer posture of the object W to be inspected is disturbed. However, it is possible to reliably specify the seal portion region S3 and inspect the seal portion defect of the object W to be inspected without limiting the transport conditions.

Although the best form of the X-ray inspection apparatus and the X-ray inspection method according to the present invention has been described above, the present invention is not limited by the description and drawings in this form. That is, it goes without saying that all other forms, examples, operational techniques, and the like made by those skilled in the art based on this form are included in the category of the present invention.

1 X-ray inspection device 2 Conveyor device 2a Conveyor belt 3 X-ray generator 4 X-ray detector 5 Setting input unit 6 Signal processing unit 7 Display unit 11 Storage means 12 External area extraction means 13 Contents area extraction means 14 Seal area Specific means 14a Unbalanced information calculation means 15 Seal defect determination means G1 Center of gravity of contents G2 Center of gravity of outer area G3 Center of outer area M Drive motor P1 to P6 Intersection S1 Outer area S2 Contents area S3 Seal area S3a Seal side W Inspected object Wa Packaging material Wb Contents Wc Seal part X Transport direction Z1 to Z3 Main shaft

Claims (7)

After the contents (Wb) are filled from the openings forming one side of the bag-shaped packaging material (Wa) , the inspected object (W) whose openings are sealed is transported by X-rays at predetermined intervals. An X-ray inspection apparatus (1) that inspects the inspected object using a transmission image transmitted through the inspected object.
Wherein said opening identifies sealed sealed area (S3) based on the contour area of the packaging material which is extracted from the transmitted image (S1) and the offset information of the content for the external-type region, wherein An X-ray inspection apparatus including a signal processing unit (6) for determining the presence or absence of a defective seal portion in the seal portion region. The X-ray inspection apparatus according to claim 1, wherein the offset information is the center of gravity (G1) of the content (Wb). A straight line toward the center of gravity (G2) before Kigai type region (S1) from the center of gravity (G1) of the content (Wb) and a main shaft (Z1), the seal edges intersecting the main axis as the sealing edge (S3a) The X-ray inspection apparatus according to claim 2, wherein the part region (S3) is specified. A straight line toward the intersection of diagonal lines of the previous Kigai type region (S1) (G3) from the center of gravity (G1) of the content (Wb) and a main shaft (Z2), the edges intersecting the main axis as the sealing edge (S3a) The X-ray inspection apparatus according to claim 2, wherein the seal region (S3) is specified. The content (Wb) specific gravity the seal region of the side distance connecting long two vertices to the vertex as a seal edge (S3a) of the (G1) from the previous Kigai type region (S1) (S3) of The X-ray inspection apparatus according to claim 2, wherein the X-ray inspection apparatus is used. Before time seal side is a short side in Kigai type region (S1), a straight line one end of the long side is parallel moved so that the position of the center of gravity (G1) of the content (Wb) and a main shaft (Z3) 2. The X-ray inspection according to claim 2, wherein the seal portion region (S3) is specified by using the short side that intersects the main axis and has a longer distance from the center of gravity of the content as the seal side (S3a). apparatus. After the content (Wb) is filled from the opening forming one side of the bag-shaped packaging material (Wa) , the object to be inspected (W) whose opening is sealed is irradiated with X-rays while being conveyed at predetermined intervals. , An X-ray inspection method for inspecting the inspected object using a transmission image transmitted through the inspected object.
A step of said opening to identify the sealed sealed area (S3) on the basis of the offset information of said content with respect to the external-type region contour region of the packaging material which is extracted from the transmitted image (S1) ,
An X-ray inspection method comprising a step of determining the presence or absence of a defective seal portion in the specified seal portion region.

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