JP2013253832A - X-ray inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray inspection device that accurately inspects an object in which area values or volume values of content are different by row due to a conveyance position of the content.SOLUTION: An X-ray inspection device 1 includes: an image processing part 43 that applies the same image processing algorithm for rows of the content of an object, to an X-ray image output by an X-ray detector 10, for image processing; and a determination part 44 that determines a shape quality of the object W by use of quality determination threshold (an upper limit value and a lower limit value) set for each of the rows of content, with respect to the X-ray image image-processed by the image processing part 43.

Description

  The present invention relates to an X-ray inspection apparatus for detecting foreign matter mixed in an inspection object (inspection object) such as meat, fish, processed food, and pharmaceutical, and in particular, an object to be inspected by being irradiated from an X-ray generator. The present invention relates to an X-ray inspection apparatus for detecting foreign matter by detecting transmitted X-rays with an X-ray detector.

  For example, an X-ray inspection apparatus has been conventionally used to detect the presence or absence of foreign matter in an inspection object such as food. In this type of conventional X-ray inspection apparatus, X-rays are irradiated to the object to be transported, and it is detected from the amount of transmitted X-rays whether foreign matter is mixed in the object to be inspected. Inspecting for foreign objects.

  In this type of X-ray inspection apparatus, when inspecting an inspection object in which a plurality of contents are accommodated in a container, image processing is performed on the X-ray image of the inspection object so that only the contents are A technique for performing extraction or enhancement of foreign matters is known (see, for example, Patent Document 1). In the technique described in this Patent Document 1, for example, a detection limit is set near a substantially intermediate level between the X-ray transmission amounts of the container and the contents by utilizing the difference in the X-ray transmission amounts of the contents and the container. By setting the value, only the contents can be extracted from the X-ray image or the container can be deleted.

Japanese Patent Laid-Open No. 2005-127862

  However, a tablet sheet in which a plurality of tablets as contents are arranged in a plurality of rows and stored in one sheet as a container is an object to be inspected, and the row of tablets is parallel to the inspection object conveyance direction. In such a case where the inspection object is brought into the inspection space, the area for each row of tablets is obtained even when the image processing is performed on the X-ray image using the technique described in Patent Document 1. Since the value and volume value (area and volume in the X-ray image) change, the threshold for determining the quality of the shape inspection such as chipping must be relaxed, and in this case, there is a problem that the inspection performance deteriorates.

  That is, in the X-ray inspection apparatus, X-rays are irradiated in a fan shape from the X-ray source toward the X-ray detector. Since the angle at which the line is irradiated is also different, there are differences in the area values and volume values between the different rows of tablets. In particular, when the contents are as small as a tablet, the difference in area value and volume value becomes significant. Further, the difference in the area value and the volume value between the tablets in different rows is also caused by an installation error of the X-ray source.

  Therefore, there is a difference in the area value and volume value between tablets in different rows, and there is a problem that the inspection performance deteriorates when the threshold value for determining the quality of the shape inspection is relaxed in consideration of this difference. It was.

  Therefore, the present invention has been made to solve the conventional problems as described above, and inspected in such a way that a difference in area value or volume value occurs for each row of contents due to a difference in the transport position of the contents. An object of the present invention is to provide an X-ray inspection apparatus that can accurately inspect an object.

  In the X-ray inspection apparatus according to the present invention, an inspection object in which a plurality of contents in a plurality of rows are accommodated in a container is arranged on the conveyance surface in the object conveyance direction, and the row of the contents Are arranged so as to be parallel to the conveyance direction of the object to be inspected, an X-ray generation means for irradiating the object to be inspected conveyed on the conveyance surface with X-rays, and the conveyance surface. An X-ray detection unit that is disposed at a position opposite to the X-ray generation unit and that outputs an X-ray image corresponding to an X-ray irradiated from the X-ray generation unit and transmitted through the inspection object. An X-ray inspection apparatus, wherein the X-ray image output by the X-ray detection unit is applied to the image processing unit by applying the same image processing algorithm to each column of the contents, and the image processing For each X-ray image that has been subjected to image processing by means of Using the quality determination threshold, characterized in that and a determining means for determining the acceptability of the shape of the object to be inspected.

  With this configuration, it is possible to set the width of the pass / fail determination threshold narrower than when the determination unit determines pass / fail of the shape of the object to be inspected using the same pass / fail determination threshold in each column of contents.

  Therefore, it is possible to accurately inspect an inspection object in which an area value or a volume value is different for each row of contents due to a difference in the conveyance position of the contents.

  Moreover, the X-ray inspection apparatus according to the present invention is characterized in that the determination means determines the quality of the shape of the inspection object based on an area value or a volume value for each tablet in the X-ray image.

  With this configuration, when a shape defect that causes a change in the area value or the volume value occurs in the inspection object, the determination unit can accurately determine the shape defect of the inspection object.

  Moreover, the X-ray inspection apparatus according to the present invention is characterized in that the determination unit determines the quality of the shape of the inspection object based on the complexity of the shape of each tablet in the X-ray image.

  With this configuration, even when a shape defect such as a chip that does not cause a change in the area value or the volume value occurs in the inspection object, the determination means can accurately determine the shape defect of the inspection object. it can.

  The X-ray inspection apparatus according to the present invention is characterized in that the image processing means performs image processing on the X-ray image output from the X-ray detection means so as to remove the container.

  With this configuration, the determination unit can accurately determine the quality of only the contents of the inspection object.

  Further, the X-ray inspection apparatus according to the present invention further comprises a transport position restricting means for restricting a position of the inspection object in a direction orthogonal to the inspection object transport direction on the transport surface to a predetermined position. And the determination unit sets a pass / fail determination threshold value for each column of the contents with reference to an installation position of the transport position regulation unit.

  With this configuration, it is possible to set a pass / fail judgment threshold value that accurately corresponds to each column of the contents of the inspection object.

  The present invention provides an X-ray inspection apparatus capable of accurately inspecting an object to be inspected in which an area value or a volume value is different for each row of contents due to a difference in the content transfer position. can do.

1 is a perspective view showing a schematic configuration of an X-ray inspection apparatus according to an embodiment of the present invention. It is a figure which shows the side surface and internal structure of the X-ray inspection apparatus which concern on embodiment of this invention. It is a top view which shows the position of the workpiece guide arrange | positioned in the conveyance part of the X-ray inspection apparatus which concerns on embodiment of this invention, and the conveyance state of to-be-inspected object. It is a figure which shows the state where the change of the area value by the difference in the conveyance position of the Y direction on a conveyance surface, and the common quality determination threshold value in each row expanded. (A)-(c) is a figure which shows the aspect of a shape defect in case the content of a to-be-inspected object is a tablet. It is a figure which shows the state which set the quality determination threshold value for every change of the area value by the difference in the conveyance position of the Y direction on a conveyance surface, and every row | line | column.

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

  First, the configuration will be described.

  As shown in FIG. 1, the X-ray inspection apparatus 1 includes a transport unit 2 and a detection unit 3 inside a housing 4, and a display unit 5 at the upper front of the housing 4.

  The transport unit 2 sequentially transports the inspection object W, which is an inspection object, at predetermined intervals. This conveyance part 2 is comprised by the belt conveyor arrange | positioned horizontally within the housing | casing 4, for example. The transport unit 2 serves as a transport surface for the inspection object W loaded from the carry-in port 7 at a transport speed set in advance by driving the drive motor 6 shown in FIG. 1 toward the carry-out port 8 side (X direction in the figure). The belt surface 2a is conveyed. A space passing through the belt surface 2 a from the carry-in entrance 7 to the carry-out exit 8 within the housing 4 forms a transport path 21.

  The detection unit 3 irradiates the inspection object W sequentially conveyed with X-rays in the inspection space 22 in the middle of the conveyance path 21 and detects X-rays transmitted through the inspection object W. An X-ray generator 9 disposed at a predetermined height above the inspection space 22 in the middle of 21 and an X-ray detector 10 disposed opposite to the X-ray generator 9 in the transport unit 2 are provided. ing.

  An X-ray generator 9 as an X-ray generation source has a configuration in which a cylindrical X-ray tube 12 provided in a metal box 11 is immersed in insulating oil (not shown). X-rays are generated by irradiating an anode target with an electron beam from 12 cathodes. The X-ray tube 12 is arranged such that its longitudinal direction is the conveyance direction (X direction) of the inspection object W. X-rays generated by the X-ray tube 12 are irradiated toward the lower X-ray detector 10 so as to cross the transport direction (X direction) in a substantially triangular screen shape by a slit (not shown). It has become.

  The X-ray detector 10 has a plurality of detection elements arranged in a straight line in a direction orthogonal to the transport direction (Y direction) on a plane in the transport direction (X direction) of the object W to be transported. is there. Specifically, the X-ray detector 10 includes a photodiode (not shown) as a plurality of detection elements arranged in a line and a scintillator (not shown) provided on the photodiode. And a line sensor (not shown).

  Further, as shown in FIG. 2, the X-ray detector 10 includes an A / D conversion unit 41. The A / D conversion unit 41 converts luminance value data from the photodiode into digital data, and the density is changed. The data is output as an X-ray image. The X-ray detector 10 transmits X-rays that pass through the inspection object W by a line sensor that linearly extends in an orthogonal direction (Y direction) orthogonal to the plane of the conveyance direction (X direction) of the inspection object W. A grayscale image corresponding to the detected amount of X-rays is output.

  As shown in FIG. 2, the belt surface 2 a of the transport unit 2 is suspended by a plurality of rollers so that the side surface shape becomes a trapezoid as a whole. 22 is horizontal, and between the inspection space 22 and the carry-out port 8 is a downward slope.

  A shielding cover 16 is provided so as to protrude laterally from the housing 4 at the upper part of the carry-in port 7 and the carry-out port 8. The shielding cover 16 is provided at an angle substantially equal to the inclination angle of the belt surface 2a at the carry-in entrance 7 and the carry-out exit 8, and the lower end thereof is from the horizontal portion in the inspection space 22 of the belt surface 2a. Is also arranged vertically downward.

  In this way, the belt surface 2a is formed in a trapezoidal shape, and the shielding cover 16 is provided in the portions of the carry-in entrance 7 and the carry-out exit 8, so that X-rays from the inspection space 22 toward the carry-in entrance 7 and the carry-out exit 8 can be obtained. Leakage is prevented. Further, in this embodiment, since no good shielding curtain is provided in the conveyance path 21, the lower end portion of the shielding curtain comes into contact with the inspection object W, and the conveyance direction position of the inspection object W changes. There is no end.

  The X-ray inspection apparatus 1 receives the X-ray image from the X-ray detector 10, and displays and outputs a control circuit 40 that inspects the presence or absence of a foreign substance in the inspection object W, and inspection results by the control circuit 40. The display unit 5 and a setting operation unit 45 for inputting various parameters and the like to the control circuit 40 are provided.

  The display unit 5 is composed of a flat display or the like, and performs display output for the user. The display unit 5 displays the pass / fail judgment result of the inspected object W with characters or symbols such as “OK” and “NG”, and the inspection results such as the total number of inspections, the number of non-defective products, and the total number of NG as default settings. Alternatively, the screen is displayed based on a request by a predetermined key operation from the setting operation unit 45.

  The setting operation unit 45 includes a plurality of keys, switches, and the like operated by the user, and performs setting input of various parameters to the control circuit 40 and selection of an operation mode. The display unit 5 and the setting operation unit 45 may be integrally configured as a touch panel display.

  The control circuit 40 includes an X-ray image storage unit 42 that stores the X-ray image received from the X-ray detector 10, and performs composition and various image processing algorithms on the X-ray image read from the X-ray image storage unit 42. The image processing unit 43 that performs the applied image processing and the X-ray image subjected to the image processing determine the quality of the inspected object W and determine the inspected object W and the foreign object, thereby mixing foreign objects. And a determination unit 44 that determines the presence or absence of the. Here, the image processing algorithm is a combination of a plurality of image processing filters.

  The image processing unit 43 removes the container Ws (see FIG. 3) of the inspection object W and extracts only the contents Wc (see FIG. 3) from the X-ray image read from the X-ray image storage unit 42. Such image processing is performed.

  The determination unit 44 determines the quality of the shape of the inspection object W based on the area value, volume value, complexity, etc. of the inspection object W with respect to the X-ray image subjected to the image processing by the image processing unit 43. At the same time, the inspection object W and foreign matter are discriminated to determine whether foreign matter is mixed.

  Here, the area value is the value of the area on the X-ray image of the object W or the contents Wc (see FIG. 3) which is the inspection object in the object W, and is within a predetermined concentration range. X-ray images are calculated as the contents Wc. The volume value is a volume value on the X-ray image of the object W or the content Wc that is the inspection object in the object W, and is calculated from the area value and the concentration. . The complexity is a value representing the complexity of the shape on the X-ray image of the object W or the content Wc that is the inspection object in the object W. Calculated by dividing the value.

  In addition, the area value or volume value of the inspection object W or the content Wc is due to a change in the area or volume of the inspection object W or the content Wc due to a manufacturing defect or chipping of the inspection object W or the content Wc. Is to increase or decrease. Further, the complexity of the inspected object W and the contents Wc is increased or decreased due to the partial indentation of the inspected object W and the contents Wc resulting in unevenness.

  Even if it is a case where the determination part 44 determines the quality of a shape based on any of the area value, volume value, and complexity of the to-be-inspected object W, it compares with the upper limit value and lower limit value as a quality determination threshold value. Thus, the pass / fail judgment is performed.

  Further, the control circuit 40 includes a control unit 46 configured to include a CPU and a memory as a control program storage area or a work area. The control unit 46 controls the entire X-ray inspection apparatus 1.

  Here, as shown in FIG. 3, the inspected object W to be inspected by the X-ray inspection apparatus 1 is one in which a plurality of contents Wc in a plurality of rows are accommodated in a container Ws. The inspection object W is, for example, a tablet sheet in which a plurality of tablets as the contents Wc are arranged in a plurality of rows and accommodated in a sheet as a container Ws.

  In the example of FIG. 3, a pocket P is formed in the sheet as the container Ws, and a tablet as the contents Wc is stored in the pocket P. In the example illustrated in FIG. 3, the inspected object W is accommodated in the sheet-like container Ws in a state where six contents Wc are arranged in two rows of three in the A row and the B row.

  In addition, a pair of work guides 70 that regulate the position of the inspection object W in the Y direction on the belt surface 2a are provided on the belt surface 2a of the transport unit 2 while being supported by a support member (not shown). . The work guide 70 moves the inspection object W conveyed from the upstream of the conveyance direction to the inspection space 22 by the conveyance unit 2 at a certain position in the Y direction on the belt surface 2a, for example, the center of the inspection object W in the Y direction. The position is regulated so as to be directly below the X-ray generator 9, and is arranged with a slight gap between the belt surface 2 a and the upstream side of the inspection space 22. The work guide 70 is in contact with both side surfaces of the sheet-like container Ws of the inspection object W to regulate the position of the inspection object W.

  In the X-ray inspection apparatus, since X-rays are irradiated in a fan shape from the X-ray generator 9 toward the X-ray detector 10, each detection element of the X-ray detector 10 is inspected at different angles. The X-ray that has passed through the object W is incident, and the area value of the object W in the X-ray image is determined by the difference in the position of the content Wc of the object W in the Y direction on the belt surface 2a of the transport unit 2. And volume values are different.

  Specifically, in the Y direction on the belt surface 2a of the transport unit 2, the contents Wc and B in the A row of the object W to be inspected with respect to the focal position (the position immediately below the X-ray generator 9). When there is a difference in distance between the contents Wc, even if the contents Wc in the A row and the contents Wc in the B row have exactly the same shape, as shown in FIG. The area value of the contents Wc and the area value of the contents Wc in the B row are different. In addition, when the number of columns of the contents Wc is increased to three or four, it is impossible to set the distance from the focal position in each column of the contents Wc to be equal.

  The difference in the area value and the volume value caused by the difference in the position of the content Wc in the Y direction is significant when the content Wc is as small as a tablet as in the present embodiment. The determination unit 44 has a great adverse effect on the quality determination of the shape.

  Specifically, the upper limit value and the lower limit value, which are the upper and lower limits of the normal range in which the determination unit 44 determines that the area value of the inspection object W is normal, are between the upper limit value and the lower limit value. Therefore, it is necessary to set so that the area value of the contents Wc in the A row and the area value of the contents Wc in the B row are accommodated. For this reason, the normal range including the upper limit value and the lower limit value has to be expanded as compared with the case where the contents Wc of the inspection object W are in a single row, and as a result, the quality determination accuracy of the determination unit 44 is deteriorated. Will be invited.

  Even when the work guide 70 is provided on the belt surface 2a of the transport unit 2, the distance from the focal position to the contents Wc in the A row and the distance from the focal position to the contents Wc in the B row There is a limit to accurately positioning the workpiece with the work guide 70.

  Here, when the content Wc of the object W to be inspected is a tablet, as a defective state of the shape generated in the tablet, as shown in FIG. 5A, the corner of the content Wc is missing. "Capping", as shown in FIG. 5B, the content Wc is laterally chipped so that the thickness of the content Wc is thin, and the content Wc is shown in FIG. 5C. There is a “chip to the bottom” that is chipped vertically from the top to the bottom.

  As shown in FIG. 4, the upper limit value and the lower limit are set for the inspected object W in which the contents Wc may cause a shape defect such as “corner chipping”, “capping”, or “bottom chipping”. If the normal range consisting of the values is expanded, the determination unit 44 cannot accurately determine the quality, and determines that the content Wc is a non-defective product with respect to the inspection object W having a slight shape defect. There is a risk that.

  Therefore, in the present embodiment, the inspection object W is accurately inspected in which the area value and the volume value are different for each column of the contents Wc due to the difference in the transport position of the contents Wc in the Y direction. Therefore, the determination unit 44 uses the pass / fail determination threshold values (upper limit value and lower limit value) set for each column of the contents Wc with respect to the X-ray image subjected to image processing by the image processing unit 43. The quality of the inspected object W is determined.

  In the present embodiment, as shown in FIG. 6, the determination unit 44 performs a pass / fail determination using the upper limit value and the lower limit value set for the A column for the contents Wc of the A column, For the contents Wc in the B row, the pass / fail judgment is performed using the upper limit value and the lower limit value set for the B row. Here, the determination unit 44 sets pass / fail determination threshold values (upper limit value and lower limit value) for each column of the contents Wc with reference to the installation position of the work guide 70.

  For example, by arranging at least the downstream rear end portion of the work guide 70 in the inspection space 22 so that the work guide 70 appears in the X-ray image, the determination unit 44 allows the work shown in the X-ray image. While recognizing the position of the guide 70, the pass / fail judgment thresholds corresponding to the A and B columns of the contents Wc are set based on the position.

  Alternatively, when the line sensor of the X-ray detector 10 is composed of, for example, 1000 elements, the area of these 1000 elements is divided into an element area of element numbers 1 to 500 and an element area of element numbers 501 to 1000. When the user inputs in advance from the setting operation unit 45 to which area of the line sensor the contents Wc of the A row and the B row are conveyed, the determination unit 44 inputs The pass / fail judgment thresholds corresponding to the A and B columns of the contents Wc are set on the basis of the position (region) thus set.

  That is, the determination unit 44 uses the position of the work guide 70 shown in the X-ray image as a reference, or uses the position of the work guide 70 input from the setting operation unit 45 as a reference, and the row A of the contents Wc. And pass / fail judgment threshold values respectively corresponding to the B columns.

  Thereby, the upper limit value and the lower limit value for the A row and the upper limit value and the lower limit value for the B row are set to the same values as when the contents Wc of the inspection object W are one row. Therefore, the determination unit 44 can perform the quality determination with high accuracy.

  In the present embodiment, since the determination unit 44 performs pass / fail determination using two (two sets) pass / fail determination thresholds for the A column and the B column, the calculation load of the determination process in the determination unit 44 However, the image processing unit 43 applies the same algorithm to the X-ray image of the object W to be inspected without distinguishing the A column and the B column of the contents Wc. Thus, the calculation load of image processing in the image processing unit 43 does not increase.

  As described above, the X-ray inspection apparatus 1 according to the present embodiment inspects the inspection object W in which the plurality of contents Wc in a plurality of rows are accommodated in the accommodating body Ws on the belt surface 2a. A transport unit 2 that transports the object W in the transport direction (X direction) and the row of the contents Wc parallel to the transport direction of the test object W, and the test target that is transported on the belt surface 2a An X-ray generator 9 for irradiating the object W with X-rays and an X-ray generator 9 disposed at a position facing the X-ray generator 9 across the belt surface 2a, irradiated from the X-ray generator 9 and transmitted through the object W to be inspected An X-ray inspection apparatus 1 including an X-ray detector 10 that outputs an X-ray image corresponding to a line, and for each row of contents Wc with respect to the X-ray image output by the X-ray detector 10 An image processing unit 43 that performs image processing using the same image processing algorithm, and the image processing unit 43 performs image processing. A determination unit 44 that determines whether the shape of the inspection object W is good or bad using threshold values (upper limit value, lower limit value) set for each column of the contents Wc for the X-ray image. It is characterized by that.

  With this configuration, the width of the pass / fail determination threshold can be set narrower than when the determination unit 44 determines the pass / fail of the shape of the inspection object W using the same pass / fail determination threshold in each column of the contents Wc.

  Therefore, it is possible to accurately inspect the inspected object W in which the area value and the volume value are different for each column of the contents Wc due to the difference in the conveyance position of the contents.

  In addition, the X-ray inspection apparatus 1 according to the present embodiment is characterized in that the determination unit 44 determines the quality of the shape of the inspection object W based on the area value or volume value for each content in the X-ray image. .

  With this configuration, when a shape defect that causes a change in the area value or the volume value occurs in the inspection object W, the determination unit 44 can accurately determine the shape defect of the inspection object W.

  In addition, the X-ray inspection apparatus 1 according to the present embodiment is characterized in that the determination unit 44 determines the quality of the shape of the inspection object W based on the complexity of the shape for each content Wc in the X-ray image. .

  With this configuration, even when a shape defect such as a chip that does not change the area value or the volume value occurs in the inspection object W, the determination unit 44 accurately determines the shape defect of the inspection object W. can do.

  The X-ray inspection apparatus 1 according to the present embodiment is characterized in that the image processing unit 43 performs image processing on the X-ray image output from the X-ray detector 10 so as to remove the container Ws. To do.

  With this configuration, the determination unit 44 can accurately determine the quality of only the contents Wc of the inspection object W.

  Further, in the X-ray inspection apparatus 1 according to the present embodiment, the conveyance unit 2 determines the position of the inspection object W in the direction (Y direction) orthogonal to the inspection object conveyance direction (X direction) on the conveyance surface. A work guide 70 that restricts the position is provided, and the determination unit 44 sets a pass / fail determination threshold value for each column of the contents Wc with reference to the installation position of the work guide 70.

  With this configuration, it is possible to set a pass / fail judgment threshold value that accurately corresponds to each column of the contents Wc of the inspection object W.

  As described above, the X-ray inspection apparatus according to the present invention accurately inspects an inspection object in which an area value or a volume value is different for each column of contents due to a difference in the content transfer position. It is useful as an X-ray inspection apparatus for inspecting an inspection object by detecting X-rays irradiated from an X-ray generator and transmitted through the inspection object with an X-ray detector. .

1 X-ray inspection apparatus 2 Conveying section (conveying means)
2a Belt surface (conveying surface)
DESCRIPTION OF SYMBOLS 3 Detection part 4 Case 5 Display part 6 Drive motor 7 Carry-in port 8 Carry-out port 9 X-ray generator (X-ray generation means)
10 X-ray detector (X-ray detection means)
12 X-ray tube 16 Shielding curtain 21 Transport path 22 Inspection space 40 Control circuit 41 A / D conversion unit 42 X-ray image storage unit 43 Image processing unit (image processing means)
44 determination unit (determination means)
45 Setting operation section 46 Control section 70 Work guide (conveying position regulating means)
W Inspected object Wc Contents Ws Container

Claims (5)

An object to be inspected (W) in which a plurality of contents (Wc) in a plurality of rows are accommodated in a container (Ws) on the conveying surface (2a) in the inspected object conveying direction, and the contents A conveying means (2) for arranging and conveying so that the row is parallel to the conveying direction of the inspection object;
X-ray generation means (9) for irradiating the inspection object conveyed on the conveyance surface with X-rays;
An X-ray detection means (positioned at a position facing the X-ray generation means across the transport surface) and outputs an X-ray image corresponding to the X-rays irradiated from the X-ray generation means and transmitted through the inspection object ( 10) and an X-ray inspection apparatus (1) comprising:
Image processing means (43) for applying image processing to the X-ray image output from the X-ray detection means by applying the same image processing algorithm in each column of the contents;
Determination means (44) for determining the quality of the shape of the object to be inspected by using a quality determination threshold set for each column of the contents with respect to the X-ray image subjected to image processing by the image processing means; An X-ray inspection apparatus comprising:   The X-ray inspection apparatus according to claim 1, wherein the determination unit determines the quality of the shape of the inspection object based on an area value or a volume value for each content in the X-ray image.   The X-ray inspection apparatus according to claim 1, wherein the determination unit determines the quality of the shape of the inspection object based on the complexity of the shape of each content in the X-ray image.   4. The X according to claim 1, wherein the image processing unit performs image processing on the X-ray image output from the X-ray detection unit so as to remove the container. 5. Line inspection device. The transport means includes transport position regulation means (70) for regulating the position of the inspection object in a direction orthogonal to the inspection object transport direction on the transport surface to a predetermined position,
5. The X according to claim 1, wherein the determination unit sets a pass / fail determination threshold value for each column of the contents with reference to an installation position of the transport position regulation unit. Line inspection device.

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