X-ray Inspection System

Abstract

To provide an X-ray inspection system capable of obtaining a clear X-ray fluoroscopic image while suppressing the amount of X-rays irradiated to an object to be inspected, and capable of miniaturizing the entire device. [Solution] The X-ray inspection system 1 includes an X-ray generator 11, an X-ray detector 12, a storage unit that stores multiple X-ray fluoroscopic image data corresponding to X-rays received multiple times by the X-ray detector 12, a display unit 23 capable of displaying X-ray fluoroscopic images, an input unit 24 that accepts input of various information, and a display control unit that controls the display unit 23. The display control unit includes a first image data generation unit that generates additively synthesized X-ray fluoroscopic image data by additively synthesizing the multiple X-ray fluoroscopic image data when a first operation input is performed on the input unit 24, and a second image data generation unit that generates averaged X-ray fluoroscopic image data by averaging the multiple X-ray fluoroscopic image data when a second operation input is performed on the input unit 24.

Description

[Technical field]

[0001] The present invention relates to an X-ray inspection system, and more particularly to an X-ray inspection system capable of displaying an X-ray fluoroscopic image on a display means. [Background technology]

[0002] 2. Description of the Related Art Conventionally, X-ray inspection devices that nondestructively inspect for defects in welded portions of steel pipes have been known. For example, the inspection device described in Patent Document 1 has been proposed as such an X-ray inspection device.

[0003] The X-ray inspection device described in Patent Document 1 is configured in such a way that a strip-shaped X-ray film sheet is placed along the welded portion on one side of a steel pipe, and an X-ray generator that can be moved along the welded portion is installed on the other side of the steel pipe, and X-rays are irradiated from the X-ray generator toward the welded portion while the X-ray generator is moved at a uniform speed along the welded portion, burning a two-dimensional X-ray transmission image of the welded portion onto the X-ray film sheet.

[0004] With this type of X-ray inspection device, the X-ray film sheet on which the welded parts of the steel pipe are printed can be read using a dedicated scanner or the like, and the read X-ray fluoroscopic image can then be displayed on a display device (e.g., a display) of a personal computer (hereinafter referred to as a "PC") or the like. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 10-038818 Summary of the Invention [Problem to be solved by the invention]

[0006] Generally, an X-ray inspection device such as that described in Patent Document 1 (hereinafter also referred to as a "conventional X-ray inspection device") is configured to obtain one X-ray fluoroscopic image by irradiating X-rays once.

[0007] That is, in conventional X-ray inspection devices, if the dose of X-rays irradiated to the inspection object is low, there is a risk that a clear X-ray fluoroscopic image cannot be obtained, so in practice, a high dose of X-rays tends to be irradiated. In such cases, the impact of X-rays on the human body increases, which can easily lead to problems such as the inability to fully ensure the safety of inspectors who inspect the inspection object.

[0008] Furthermore, when such an X-ray inspection device is configured to generate a higher dose of X-rays, not only does the internal structure become more complex, but the entire device also generally becomes larger in size. In other words, problems such as a decrease in the efficiency of the inspection work arise, particularly when such an X-ray inspection device needs to be directly attached to the object to be inspected as in Patent Document 1.

[0009] Furthermore, as mentioned above, in conventional X-ray inspection devices, the X-ray fluoroscopic image cannot be viewed on the display device unless it is read using a dedicated scanner or the like, which makes the process complicated.

[0010] The present invention aims to provide an X-ray inspection system that can obtain X-ray fluoroscopic images of high image quality while reducing the amount of X-rays irradiated to the object being inspected, and that can reduce the size of the entire device. [Means for solving the problem]

[0011] The above-mentioned problem is solved by an X-ray inspection system according to the present invention, which includes an X-ray irradiation means for irradiating an inspection object with X-rays in a plurality of separate steps, an X-ray image receiving means for receiving the X-rays that have passed through the inspection object, a storage means for storing a plurality of X-ray fluoroscopic image data corresponding to the X-rays received in a plurality of separate steps by the X-ray image receiving means, a display means capable of displaying an X-ray fluoroscopic image based on the X-ray fluoroscopic image data stored in the storage means, an input means for receiving input of various information, and a display control means for controlling the display means, wherein the input means receives a first operation input for adding and synthesizing the plurality of X-ray fluoroscopic image data stored in the storage means, and a second operation input for averaging the plurality of X-ray fluoroscopic image data stored in the storage means. The problem is solved by the display control means being capable of accepting an operation input, the display control means having a first image data generation unit that, when the first operation input is made to the input means, adds and combines multiple X-ray fluoroscopy image data to generate the added and combined X-ray fluoroscopy image data, and when the second operation input is made to the input means, averages the multiple X-ray fluoroscopy image data to generate the averaged X-ray fluoroscopy image data, and controlling the display means to display an X-ray fluoroscopy image corresponding to the X-ray fluoroscopy image data generated by the first image data generation unit or the second image data generation unit.

[0012] In addition, the X-ray inspection system according to the present invention preferably further comprises a support means having an inspection object mounting section that is detachably attached to the inspection object, an X-ray irradiation means holding section that holds the X-ray irradiating means, and an X-ray receiving means holding section that holds the X-ray receiving means so as to face the X-ray irradiating means held in the X-ray irradiating means holding section, and the X-ray irradiating means holding section has a moving mechanism that is capable of moving the X-ray irradiating means along the outer surface of the inspection object with the inspection object mounting section attached to the inspection object. In this case, it is more preferable that the object to be inspected is a steel pipe having a welded portion welded along the circumferential direction, and that the moving mechanism is configured to be able to move the X-ray irradiation means along the tube axial direction of the object to be inspected.

[0013] Furthermore, in the X-ray inspection system of the present invention, it is preferable that the input means is capable of accepting a third operation input for plotting two input points on the X-ray fluoroscopic image displayed on the display means, and the display control means has a profile image data generation unit that generates profile image data of the X-ray fluoroscopic image between the two input points when the third operation input is performed on the input means, and controls the display means to display a profile image corresponding to the profile image data generated by the profile image data generation unit. Effect of the Invention

[0014] As described above, the X-ray inspection system of the present invention has a relatively simple configuration, yet can easily obtain high-quality X-ray fluoroscopic images while reducing the amount of X-rays irradiated to the object being inspected, and can reliably reduce the size of the entire device. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic diagram showing an embodiment of an X-ray inspection system according to the present invention. [Diagram 2] FIG. 2 is a perspective view of an X-ray inspection device constituting the X-ray inspection system of FIG. [Diagram 3] FIG. 3 is a schematic diagram for explaining the state of X-rays irradiated from the X-ray generator constituting the X-ray inspection apparatus of FIG. 2 to an inspection object. [Figure 4] FIG. 4 is a block diagram of the X-ray inspection system of FIG. [Diagram 5] FIG. 5 is an image diagram showing an example of an initial image in the shooting mode displayed on the display unit of the control device. [Figure 6] FIG. 6 is an image diagram showing an example of a setting image for setting the photographing conditions displayed on the display unit of the control device. [Figure 7] FIG. 7 is an image diagram showing an example of an image displayed on the display unit of the control device while the inspection object is being photographed. [Figure 8]FIG. 8 is an image diagram showing an example of an X-ray fluoroscopic image displayed on the display unit of the control device in the imaging mode. [Figure 9] FIG. 9 is an image diagram showing an example of an initial image in the edit mode displayed on the display unit of the control device. [Figure 10] FIG. 10 is an image diagram showing an example of an X-ray fluoroscopic image and a profile image displayed on the display unit of the control device in the edit mode. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, the X-ray inspection system of the present invention will be described based on a preferred embodiment with reference to the drawings. Fig. 1 is a schematic diagram showing an embodiment of the X-ray inspection system according to the present invention, Fig. 2 is a perspective view of an X-ray inspection device constituting the X-ray inspection system, Fig. 3 is a schematic diagram for explaining the state of X-rays irradiated from an X-ray generator constituting the X-ray inspection device to an inspection object, Fig. 4 is a block diagram of the X-ray inspection system, Fig. 5 is an image diagram showing an example of an initial image in the shooting mode displayed on the display unit of the control device, Fig. 6 is an image diagram showing an example of a setting image for setting shooting conditions displayed on the display unit of the control device, Fig. 7 is an image diagram showing an example of an image displayed on the display unit of the control device while the inspection object is being shot, Fig. 8 is an image diagram showing an example of an X-ray fluoroscopic image displayed on the display unit of the control device in the shooting mode, Fig. 9 is an image diagram showing an example of an initial image in the edit mode displayed on the display unit of the control device, and Fig. 10 is an image diagram showing an example of an X-ray fluoroscopic image and a profile image displayed on the display unit of the control device in the edit mode.

[0017] <Overall configuration of material supply device 1> 1, the X-ray inspection system 1 according to this embodiment is a system capable of irradiating an inspection object with X-rays and displaying an X-ray fluoroscopic image of the inspection object on a desired display device, and is configured to include an X-ray inspection device 10 and a control device 20. The above-mentioned X-ray inspection system 1 corresponds to the "X-ray inspection system" set forth in the claims of the utility model registration.

[0018] In the following, an example will be described in which the X-ray inspection system 1 is used to inspect a welded portion Ow where the pipe ends of a steel pipe O are butted together and welded (non-destructive inspection of the butt weld of the steel pipe O), but the present invention is not limited to this, and may be used to inspect a steel pipe O that does not have a welded portion Ow, for example, to inspect the deterioration state of the steel pipe O (inspection of wall thickness, outer diameter, etc.), and may also be used to inspect objects other than the steel pipe O. In addition, in this embodiment, the object to be inspected is assumed to be a carbon steel pipe for piping (JIS G 3452) with a diameter of 100A to 150A, but it may be of another size or may be another type of steel pipe (for example, a carbon steel pipe for pressure piping (JIS G 3454-1988)).

[0019] [X-ray inspection equipment 10] 2, the X-ray inspection device 10 is an apparatus for irradiating an inspection object, a steel pipe O, with X-rays to inspect the internal structure of the inspection object (in this embodiment, for inspecting defects in a welded portion Ow), and includes an X-ray generator 11, an X-ray detector 12, and a support member 15. The X-ray generator 11, the X-ray detector 12, and the support member 15 correspond to the "X-ray irradiating means," the "X-ray receiving means," and the "supporting means" described in the claims of the utility model patent.

[0020] 4, the X-ray generator 11 and the X-ray detector 12 are connected to each other by a bus 14, and are connected to the control device 20 in a wired or wireless manner via a communication unit 13. Although details will be described later, in this embodiment, the X-ray fluoroscopic image data of the inspection object generated by the X-ray detector 12 is configured to be transmitted to the control device 20 via the communication unit 13. Note that, in this embodiment, the X-ray generator 11 and the X-ray detector 12 are electrically connected to the control device 20 via the communication unit 13, but it is also possible to omit the communication unit 13 and directly connect them.

[0021] (X-ray generator 11) As shown in FIG. 2, the X-ray generator 11 is a device that generates X-rays and irradiates the object to be inspected (a steel pipe O having a welded portion Ow) with the generated X-rays (see "X-ray irradiation unit 11A" in FIG. 3). As a source for generating X-rays, for example, a known X-ray tube can be used. As will be described in detail later, in this embodiment, the "output voltage" (tube voltage), "tube current", "irradiation time", etc. of the X-rays irradiated from the X-ray generator 11 can be appropriately changed by operating the input unit 24 of the control device 20 (see FIG. 6).

[0022] (X-ray detector 12) The X-ray detector 12 is a device that detects X-rays irradiated from the X-ray generator 11. Specifically, the X-ray detector 12 is a device that detects X-rays (X-ray amount) that have passed through the steel pipe O, which is the object of inspection, and outputs (transmits) the detected X-ray fluoroscopic image data of the object of inspection to the control device 20.

[0023] In this embodiment, a known flat panel (FPD: Flat Panel Detector) is used as the X-ray detector 12. Note that, although this embodiment will be described taking as an example a case where a flat panel is used as a device for detecting X-rays, other types of X-ray detectors can also be used.

[0024] As such a flat panel, for example, a known one composed of an X-ray conversion film, a photodiode, and a thin film transistor can be used.

[0025] The X-ray conversion film is a film-like member that converts incident X-rays into light, and for example, a scintillator can be used. The photodiode is a light receiving element that constitutes a plurality of pixels arranged in a lattice pattern, and converts the light converted by the X-ray conversion film into an electric signal. The thin film transistor is an electronic component that reads out the electric signal converted by the photodiode, and for example, a known TFT (Thin Film Transistor) switch can be used.

[0026] The electrical signal read out by the thin film transistor, i.e., the signal indicating the measurement value (count value) detected for each pixel, is imaged by the action of an A / D conversion element, a low-noise amplifier circuit, etc., and is output to the outside (in this embodiment, the control device 20 (see Figures 1 and 4)) as two-dimensional X-ray fluoroscopic image data that can be defined by X and Y coordinates.

[0027] (Support member 15) The support member 15 is a member for attaching the X-ray generator 11 and the X-ray detector 12 to the steel pipe O (inspection object), and includes an X-ray detector holding part 16, an inspection object attachment part 17, and an X-ray generator holding part 18. The X-ray detector holding part 16, the inspection object attachment part 17, and the X-ray generator holding part 18 correspond to the "X-ray receiving means holding part", the "inspection object attachment part", and the "X-ray irradiation means holding part" respectively described in the claims of the utility model registration.

[0028] The X-ray detector holding portion 16 is a part that holds the X-ray detector 12, and has a substantially rectangular plate-shaped member 16A and a pair of X-ray detector clamping claws 16B, 16B that are erected at a distance from each other from the upper surface of the plate-shaped member 16A.

[0029] The X-ray detector gripping claws 16B are formed with a cross section of a generally inverted L-shape, and have a generally V-shaped mounting surface on which the steel pipe O can be placed. The pair of X-ray detector gripping claws 16B, 16B are arranged at both longitudinal ends of the plate-shaped member 16A with their inner faces facing each other. Although not shown in the figures, two holes are formed on both longitudinal sides of the X-ray detector gripping claws 16B at both longitudinal ends of the plate-shaped member 16A, through which the bolt portions of the U-bolts 17A described later can be inserted.

[0030] The X-ray detector 12 can be attached to the X-ray detector holding portion 16 by inserting the X-ray detector 12 between the pair of X-ray detector holding claws 16B, 16B and holding it therebetween.

[0031] The inspection object mounting portion 17 is a part that is attached to the inspection object (steel pipe O), and has a pair of U-bolts 17A, 17A and multiple (in this embodiment, four) fastening members 17B that can be screwed into the bolt portion of the U-bolt 17A.

[0032] The X-ray detector holding portion 16 can be attached to the object to be inspected (steel pipe O) in the following steps: (1) with the supporting surfaces of the X-ray detector clamping claws 16B, 16B abutting against the steel pipe O, attaching the U-bolt 17A so as to cover the steel pipe O from above; (2) inserting the bolt portion of the U-bolt 17A through the hole portion of the plate-shaped member 16A, and then screwing and tightening the fastening member 17B into the bolt portion.

[0033] The X-ray generator holding part 18 is a part that holds the X-ray generator 11, and is connected to the X-ray detector holding part 16 and the inspection object mounting part 17 via connecting members consisting of multiple (in this embodiment, four) support members 19A, an upper horizontal member 19B, and a middle horizontal member 19C.

[0034] The support member 19A is made of a cylindrical or straight tube-shaped metal member and stands upright from the four corners of the X-ray detector holding part 16 (plate-shaped member 16A). The upper horizontal member 19B and the middle horizontal member 19C are both made of a cylindrical or pipe-shaped metal member and are formed in a substantially rectangular ring shape. The upper horizontal member 19B is connected to the upper ends of the multiple support members 19A via a predetermined connecting member, and the middle horizontal member 19C is connected near the center of the multiple support members 19A in the up-down direction (height direction) via a predetermined connecting member, just like the upper horizontal member 19B.

[0035] The X-ray generator holding portion 18 has a slider member 18A, a fastening member 18B, a plurality of (two in this embodiment) rod-shaped cross members 18C, and a pair of X-ray generator sandwiching members 18D, 18D.

[0036] The slider member 18A has one end that holds the rod-shaped cross member 18C and the other end that is attached to the support member 19A so as to be freely slidable in the up and down direction. The fastening member 18B is a screw member having a handle member, and has a male screw portion (not shown) that can be screwed into a female screw portion (not shown) formed on the other end of the slider member 18A.

[0037] The rod-shaped horizontal member 18C is made of a cylindrical or straight tubular metal member and is attached to the support member 19A via the slider member 18A. The two rod-shaped horizontal members 18C, 18C are disposed substantially parallel to each other with a predetermined gap therebetween in the vertical direction between the upper horizontal member 19B and the middle horizontal member 19C.

[0038] The rod-shaped cross member 18C can be slid up and down along the support member 19A by rotating the fastening member 18B in a loosening direction (e.g., counterclockwise), and can be locked in position by rotating it in a tightening direction (e.g., clockwise).

[0039] The pair of X-ray generator clamping members 18D, 18D are members that hold the X-ray generator 11 in a sandwiched state from the left and right directions, and include a pair of upper and lower slider members 18D1, 18D1, a plate-shaped member 18D2, a fastening member 18D3 provided on the slider member D1, and an X-ray generator clamping claw 18D4.

[0040] The slider member 18D1 is a member similar to the slider member 18A described above, and has one end attached to the rod-shaped horizontal member 18C so as to be slidable in the left-right direction, and the other end to which the plate-shaped member 18D2 is attached. The plate-shaped member 18D2 is a member that connects the pair of upper and lower slider members 18D1, 18D1. The fastening member 18D3 is a member similar to the fastening member 18B described above, and has a male screw portion (not shown) that can be screwed into a female screw portion (not shown) formed at one end of the slider member 18D1. The X-ray generator clamping claws 18D4 have a cross section that is approximately L-shaped, and protrude from the plate-shaped member 18D2. The rod-shaped horizontal member 18C and the slider member 18D1 correspond to the "moving mechanism" described in the utility model registration claims.

[0041] The X-ray generator 11 can be attached to the support member 15 in the following steps, assuming that a pair of X-ray generator clamping members 18D, 18D are attached to a pair of upper and lower rod-shaped cross members 18C, 18C: (1) the pair of X-ray generator clamping members 18D, 18D are slid left and right to clamp the X-ray generator 11; and (2) each fastening member 18D3 is rotated in a tightening direction (e.g., clockwise).

[0042] In this embodiment, since the support member 15 is configured in this manner, even after the X-ray inspection device 10 is attached to the steel pipe O, the X-ray generator 11 can be moved in the vertical direction (extension direction of the support member 19A) by operating the fastening member 18B, and can also be moved in the horizontal direction (extension direction of the rod-shaped cross member 18C) by operating the fastening member 18D3. As a result, in this embodiment, it is possible to easily adjust the position of the X-ray generator 11 relative to the steel pipe O, i.e., the irradiation position and range of the X-rays irradiated to the steel pipe O.

[0043] In particular, in this embodiment, the X-ray generator 11 can be moved along the extension direction of the rod-shaped cross member 18C, i.e., along the axial direction of the steel pipe O. Therefore, for example, as shown in FIG. 3, it is possible to obtain not only an X-ray fluoroscopic image Ix (not shown) on which one weld projection image Iw1 is projected, but also an X-ray fluoroscopic image (see FIG. 8, etc.) on which two weld projection images Iw2a, Iw2b are projected.

[0044] Specifically, when the X-ray irradiation section 11A of the X-ray generator 11 is positioned directly above the weld Ow of the steel pipe O, an X-ray fluoroscopic image Ix (not shown) in which one weld projection image Iw1 is displayed can be obtained, and when the X-ray irradiation section 11A is positioned at a position shifted from that, an X-ray fluoroscopic image Ix in which two weld projection images Iw2a, Iw2b are displayed can be obtained, i.e., an X-ray fluoroscopic image Ix in which the entire circumference of the weld Ow is displayed (see Figure 8, etc.).

[0045] In this way, in this embodiment, it is possible to photograph the welded portion Ow from the desired angle without the need to take the time to reattach the X-ray generator 11 to the steel pipe O, thereby reliably improving the efficiency of inspection work.

[0046] 2, by rotating the fastening member 17B in a direction to loosen it, the X-ray generator 11 and the X-ray detector 12 can be rotated about the axial direction of the steel pipe O. In this respect, the support member 15 according to this embodiment can be said to facilitate adjustment of the irradiation position of the X-rays on the steel pipe O, etc.

[0047] [Control device 20] As shown in Figs. 1 and 4, the control device 20 includes a central control unit 21 (CPU: Central Processing Unit), a memory unit 22, a display unit 23, an input unit 24, and a communication unit 25, which are connected to each other via a bus 26. The control device 20 is also connected to the X-ray inspection apparatus 10 via the communication unit 25 in a wired or wireless manner. In this embodiment, a desktop personal computer (see Fig. 1) is exemplified as the control device 20, but other terminals such as a notebook computer or a tablet may also be used. The memory unit 22, display unit 23, and input unit 24 correspond to the "memory means", "display means", and "input means" described in the claims of the utility model, respectively.

[0048] (Central Control Unit 21) 4, the central control unit 21 is a device that reads a program stored in the storage unit 22, performs a predetermined calculation process, and executes various controls, and has an X-ray photography control unit 21A and a display control unit 21B. The display control unit 21B corresponds to the "display control means" described in the claims of the utility model.

[0049] The X-ray photography control unit 21A performs processing to control the operation of the X-ray inspection device 10. Specifically, when an operation to start photographing an inspection object (steel pipe O) by the X-ray inspection device 10 is performed via the input unit 24 (see Figs. 5 to 7), the X-ray photography control unit 21A performs processing to transmit an irradiation command to the X-ray generator 11 to irradiate X-rays and transmit a detection command to the X-ray detector 12 to detect X-rays. As a result, the X-ray generator 11 irradiates the inspection object (steel pipe O) with X-rays, and the X-ray detector 12 transmits to the control device 20 X-ray fluoroscopic image data of the inspection object based on the detected X-rays (X-ray dose).

[0050] In this embodiment, in addition to the setting items such as the "output voltage" (tube voltage), "tube current" and "irradiation time" of the X-rays irradiated from the X-ray generator 11, the "number of shots" (number of shots) can also be set (see FIG. 6). When the value of the number of shots ("number of shots") is set to "2" or more, one of three options is selected from (1) "averaging", (2) "additional synthesis", or (3) both (1) and (2) for multiple X-ray fluoroscopic image data (electrical signals (pixel signals)) transmitted from the X-ray detector 12 (see FIG. 6). The control processes related to the above-mentioned various setting items, "averaging" and "additional synthesis" will be described in detail later.

[0051] In this embodiment, imaging of the inspection object is permitted on condition that all of the above-mentioned settings have been completed (see Figs. 5 to 7). When the number of imaging times is set to "2" or more, imaging of the inspection object is performed under the same conditions, such as the positions of the X-ray generator 11 and the X-ray detector 12 relative to the inspection object and the X-ray irradiation angle.

[0052] The display control unit 21B is a part that controls the display unit 23, and has a first image data generation unit 21B1, a second image data generation unit 21B2, and a profile image data generation unit 21B3. Specifically, the display control unit 21B performs processing such as aspect ratio adjustment and resizing on the X-ray fluoroscopic image data received from the X-ray detector 12, and performs processing to display the data on the display unit 23. Note that the first image data generation unit 21B1, the second image data generation unit 21B2, and the profile image data generation unit 21B3 correspond to the "first image data generation unit," the "second image data generation unit," and the "profile image data generation unit" recited in the claims for utility model registration, respectively.

[0053] In this embodiment, as described above, when the object to be inspected is photographed multiple times (when the "number of photographs" is set to "2" or more (see FIG. 6)), electrical signals (pixel signals) indicative of multiple X-ray fluoroscopic image data received from the X-ray detector 12 are "averaged" or "added together" to generate new (single) X-ray fluoroscopic image data. For ease of explanation, hereinafter, the "averaged" X-ray fluoroscopic image data and X-ray fluoroscopic image will also be referred to as "average X-ray fluoroscopic image data" and "average X-ray fluoroscopic image", and the "added together" X-ray fluoroscopic image data and X-ray fluoroscopic image will also be referred to as "added X-ray fluoroscopic image data" and "added X-ray fluoroscopic image".

[0054] The first image data generating unit 21B1 performs a process of "averaging" electrical signals indicating a plurality of X-ray fluoroscopic image data to generate average X-ray fluoroscopic image data. When the average X-ray fluoroscopic image data is generated by the first image data generating unit 21B1, an image corresponding to the average X-ray fluoroscopic image data (average X-ray fluoroscopic image) is displayed on the display unit 23 by performing a predetermined operation on the input unit 24. A specific operation method for obtaining the average X-ray fluoroscopic image will be described later.

[0055] The second image data generating unit 21B2 performs a process of "adding and synthesizing" electrical signals indicating a plurality of X-ray fluoroscopic image data to generate added X-ray fluoroscopic image data. When the added X-ray fluoroscopic image data is generated by the second image data generating unit 21B2, an image corresponding to the added X-ray fluoroscopic image data (added X-ray fluoroscopic image) is displayed on the display unit 23 by performing a predetermined operation on the input unit 24. A specific operation method for obtaining the added X-ray fluoroscopic image will be described later.

[0056] The average X-ray fluoroscopic image data generated by the first image data generating unit 21B1 and the added X-ray fluoroscopic image data generated by the second image data generating unit 21B2 are configured to be stored in the storage unit 22. When the inspection object is imaged once, the X-ray fluoroscopic image data transmitted from the X-ray detector 12 is stored in the storage unit 22 as is in principle.

[0057] Although details will be described later, in this embodiment, by plotting two input points (see "first input point P1" and "second input point P2" in FIG. 10) on the X-ray fluoroscopic image Ix (see FIG. 10) displayed on the display unit 23, profile image data corresponding to a line connecting these input points (see "line L" in FIG. 10) is generated.

[0058] The profile image data generating unit 21B3 performs a process of generating profile image data corresponding to a line connecting two input points input by an inspector or the like who inspects an inspection object.

[0059] Specifically, when the first input point P1 and the second input point P2 as shown in FIG. 10 are plotted on the X-ray fluoroscopic image Ix, the profile image data generating unit 21B3 performs the following processes in order. (1) The coordinates of the first input point P1 and the second input point P2 on the X-ray fluoroscopic image Ix are calculated. (2) Determine which position in the X-ray fluoroscopy image data corresponding to the X-ray fluoroscopy image Ix (average X-ray fluoroscopy image data if it is an average X-ray fluoroscopy image, or added X-ray fluoroscopy image data if it is an added X-ray fluoroscopy image) the two coordinates calculated in (1) correspond to. (3) Data on the line connecting the positions obtained in (2) (X-ray fluoroscopic image data) is obtained from the storage unit 22. (4) Based on the data acquired in (3), profile image data of the X-ray fluoroscopic image data is generated.

[0060] As a result, in this embodiment, it is possible to display the profile image Ip corresponding to the generated profile image data alongside the X-ray fluoroscopic image Ix on the display unit 23 (see FIG. 10).

[0061] As described above, in this embodiment, the profile image data is configured to be generated based on the detection result (X-ray fluoroscopic image data) detected by the X-ray detector 12. Therefore, it is possible to display the profile image Ip (graph) consisting of accurate values on the display unit 23 (see FIG. 10). As a result, according to this embodiment, the normality of the X-ray detector 12 can be confirmed, and when measuring the size of the defect of the welded part Ow, etc., it can be numerically evaluated based on accurate values.

[0062] (Storage unit 22) The storage unit 22 consists of a semiconductor memory such as a ROM or a RAM, and stores a program for executing control processing by the central control unit 21, for example, the processing for generating the average X-ray fluoroscopic image data, the added X-ray fluoroscopic image data, and the profile image data as described above. Further, the storage unit 22 is provided with a storage area for storing the X-ray fluoroscopic image data transmitted from the X-ray detector 12 (in the case of generating the average X-ray fluoroscopic image data or the added X-ray fluoroscopic image data, the generated data).

[0063] (Display unit 23, Input unit 24, Communication unit 25) The display unit 23 is, for example, composed of a liquid crystal display (LCD: Liquid Crystal Display), and is a device that displays a predetermined image based on a command from the central control unit 21. The input unit 24 is, for example, composed of a known keyboard or a touch panel, and is a device capable of inputting various information. The communication unit 25 is an interface capable of communicating with communication devices such as the X-ray inspection apparatus 10 via a wired cable or a wireless LAN.

[0064] <Method of using the X-ray inspection system 1> Next, a method of using the X-ray inspection system 1 will be described with reference to Fig. 1 and Fig. 5 to Fig. 10. For convenience of explanation, the following explanation will be given on the assumption that the X-ray inspection device 10 and the control device 20 are in a state in which they can communicate with each other, the X-ray generator 11 and the X-ray detector 12 are attached to the steel pipe O via a support member 15, and the X-ray generator 11 is arranged in such a manner that the welded portion Ow (inspection object) of the steel pipe O can be photographed obliquely (see Fig. 3).

[0065] The method of using the X-ray inspection system 1 according to this embodiment starts with starting up the program of this system and causing the display unit 23 to display a main screen (not shown).

[0066] The main screen is a screen that allows the selection of various modes, such as an "imaging mode" that allows the imaging of an object by irradiating X-rays and viewing and editing X-ray fluoroscopic image data that has been previously captured. Note that it is preferable to configure the main screen so that the selection of the "imaging mode" and the "editing mode" can be performed not only on the above-mentioned menu screen, but also on each screen (see Figs. 5 and 9, etc.) described later, from the viewpoint of improving operability, etc. Such a configuration can be realized, for example, by providing icons (icon I1 with the words "imaging mode" and icon I2 with the words "editing mode") that the operator can select (click, etc.) at appropriate positions on the screen, as shown in Fig. 5, etc. In the following, in order to facilitate understanding of the present invention, the use of the above-mentioned "photography mode" and "editing mode" will be mainly described. First, the use of the "photography mode" will be described with reference to Figs. 5 to 8.

[0067] [How to use in shooting mode] In this embodiment, when "shooting mode" is selected on a menu screen or the like, the display unit 23 is configured to display an initial screen in the "shooting mode" as shown in FIG. 5 (hereinafter referred to as "the initial screen of FIG. 5").

[0068] On the initial screen of Fig. 5, an icon I3 with the word "shooting" written at a predetermined position is displayed. This icon I3 is an icon for starting X-ray shooting. In this embodiment, by operating the input unit 24 to select the icon I3, a setting screen for setting shooting conditions as shown in Fig. 6 (hereinafter referred to as "the setting screen of Fig. 6") is displayed.

[0069] The setting screen in Figure 6 displays setting items related to the X-rays emitted from the X-ray generator 11, such as "output voltage" (tube voltage), "tube current," and "irradiation time," as well as setting items such as "number of shots."

[0070] In this embodiment, when the "number of shots" is set to a value of 2 or more, at least one of "averaging" and "additive synthesis" of the captured X-ray fluoroscopic image data is selected. Specifically, (1) when "additive synthesis" is selected, an icon I4 with the word "addition" is selected, (2) when "averaging" is selected, an icon I5 with the word "average" is selected, and (3) when both "additive synthesis" and "averaging" are selected, two icons I4 and I5 are selected. In this embodiment, after all the above-mentioned setting items are input, the input contents are confirmed by selecting (clicking) an icon I6 with the word "set" on it.

[0071] In this embodiment, thereafter, X-ray photography of the inspection object (steel pipe O having a welded portion Ow) is performed by performing a predetermined operation (for example, an operation to perform photography) on the input unit 24. Note that when the "number of photographs" is set to a plurality of values, as described above, the photography of the inspection object is performed all under the same conditions, i.e., without changing the positions of the X-ray generator 11 and the X-ray detector 12 or the irradiation angle of the X-rays (see FIG. 2, etc.).

[0072] In this embodiment, while X-ray photography of the object to be inspected (steel pipe O having a welded portion Ow) is being performed, the display unit 23 is configured to display an image indicating that "photography in progress" as shown in Figure 7.

[0073] When the set number of X-ray images has been taken, an X-ray fluoroscopic image Ix such as that shown in Fig. 8 is displayed on the display unit 23. The X-ray fluoroscopic image Ix shown in Fig. 8 was taken by photographing the welded portion Ow of the steel pipe O from an oblique angle (see Fig. 3), so that the welded portion Ow is displayed like a biconvex lens. Of the welded portion Ow in the X-ray fluoroscopic image Ix, the curved portion on the left side indicates the welded portion Ow closer to the X-ray generator 11, and the curved portion on the right side indicates the welded portion Ow farther from the X-ray generator 11.

[0074] When the "number of shots" is one, for example, the display unit 23 displays an X-ray fluoroscopic image corresponding to the captured X-ray fluoroscopic image data without, in principle, processing the image.

[0075] On the other hand, when the "number of shots" is two or more, if icon I5 with the word "average" drawn on it is selected on the setting screen of Fig. 6, an average X-ray fluoroscopic image corresponding to the average X-ray fluoroscopic image data generated by first image data generating unit 21B1 (see Fig. 4) is displayed on display unit 23, and if icon I4 with the word "addition" drawn on it is selected, an added X-ray fluoroscopic image corresponding to the added X-ray fluoroscopic image data generated by second image data generating unit 21B2 (see Fig. 4) is displayed. Note that, if two icons I4, 5 with the words "addition" and "average" drawn on it are selected on the setting screen of Fig. 6, two images, the average X-ray fluoroscopic image and the added X-ray fluoroscopic image, are displayed on display unit 23 simultaneously or switchably.

[0076] Thus, in this embodiment, when an object to be inspected is photographed with an appropriate dose of X-rays, the signal-to-noise ratio can be set to an appropriate value by selecting the "average" icon I3, and as a result, an X-ray fluoroscopy image Ix (average X-ray fluoroscopy image) with clearer image quality can be obtained.

[0077] Furthermore, in this embodiment, when an object to be inspected is photographed with a relatively low dose of X-rays, the signal-to-noise ratio can be reliably improved by simply selecting the "addition" icon I4, and as a result, an X-ray fluoroscopy image Ix (added X-ray fluoroscopy image) of clear image quality can be obtained while ensuring the safety of inspectors, etc.

[0078] After the X-ray fluoroscopic image Ix is displayed on the display unit 23, it is possible to perform image adjustments such as contrast adjustment and gamma adjustment by performing a predetermined operation on the input unit 24. With this configuration, it is possible to obtain an X-ray fluoroscopic image Ix with clearer image quality. Such image adjustments are not limited to being performed manually, but can also be performed automatically.

[0079] [How to use in edit mode] Next, a method of use in the "edit mode" will be described with reference to FIGS.

[0080] In this embodiment, when "edit mode" is selected (by clicking, etc.) on a menu screen (not shown) or the like, the display unit 23 is configured to display an initial screen in "edit mode" as shown in FIG. 9 (hereinafter referred to as "the initial screen of FIG. 8").

[0081] The settings screen in FIG. 9 displays items necessary for image editing, such as "highlighting" and "gradation display," as well as items such as "area profile" (icon I7).

[0082] An icon I7 with the words "region profile" is an icon for generating profile image data for a partial region of the X-ray fluoroscopic image Ix. In this embodiment, the input unit 24 is operated to select the icon I7, thereby allowing the partial region of the X-ray fluoroscopic image Ix to be specified.

[0083] Specifically, as shown in Fig. 10, a partial area of ​​the X-ray fluoroscopic image Ix can be specified by selecting an icon I7 using the input unit 24, and then plotting two input points (see "first input point P1" and "second input point P2" in Fig. 10) for determining a line L for which it is desired to generate profile image data on the X-ray fluoroscopic image Ix. The first input point P1 and the second input point P2 correspond to the "two input points" described in the claims of the utility model registration. In the example shown in Fig. 10, after the first input point P1 and the second input point P2 are input, the line L connecting these input points P1 and P2 is displayed, but it is also possible to configure so that this line L is not displayed as necessary.

[0084] In this embodiment, when a first input point P1 and a second input point P2 as shown in Fig. 10 are input on an X-ray fluoroscopic image Ix, profile image data is generated by a profile image data generating unit 21B3 (see Fig. 4) based on the X-ray fluoroscopic image data. As a result, a profile image Ip (graph) corresponding to the generated profile image data is displayed on the display unit 23.

[0085] In this manner, in this embodiment, since the profile image data is generated based on the detection results (X-ray fluoroscopic image data) detected by the X-ray detector 12, it is possible to display a profile image Ip (graph) consisting of accurate values ​​on the display unit 23. As a result, according to this embodiment, it is possible to confirm the normality of the X-ray detector 12, and when measuring the size of a defect in the welded portion Ow, it is possible to perform a numerical evaluation based on accurate values.

[0086] <Configuration and Effects of the Embodiment> As described above, the X-ray inspection system 1 according to this embodiment includes an X-ray generator 11 that irradiates an inspection object (a steel pipe O having a welded portion Ow) with X-rays in multiple separate instances, an X-ray detector 12 that receives the X-rays that have passed through the inspection object, a memory unit 22 that stores multiple X-ray fluoroscopic image data corresponding to the X-rays received in multiple instances by the X-ray detector 12, a display unit 23 that can display an X-ray fluoroscopic image Ix based on the X-ray fluoroscopic image data stored in the memory unit 22, an input unit 24 that accepts input of various information, and a display control unit 21B that controls the display unit 23. The input unit 24 receives a first operation input for adding and synthesizing the multiple X-ray fluoroscopic image data stored in the memory unit 22, and The display control unit 21B is capable of accepting a second operation input for averaging, and has a first image data generation unit 21B1 that, when a first operation input is made to the input unit 24, adds and combines multiple X-ray fluoroscopic image data to generate the added and combined X-ray fluoroscopic image data, and a second image data generation unit 21B2 that, when a second operation input is made to the input unit 24, averages the multiple X-ray fluoroscopic image data to generate the averaged X-ray fluoroscopic image data, and controls the display unit 23 to display an X-ray fluoroscopic image Ix corresponding to the X-ray fluoroscopic image data generated by the first image data generation unit 21B1 or the second image data generation unit 21B2.

[0087] In other words, in the X-ray inspection system 1 of this embodiment, when the object to be inspected is photographed with a low dose of X-rays, it is possible to improve the S / N ratio or set it to an appropriate value simply by performing a first operation input for additively combining X-ray fluoroscopic image data, and when the object to be inspected is photographed with an appropriate dose of X-rays, it is possible to improve the S / N ratio or set it to an appropriate value simply by performing a second operation input for averaging the X-ray fluoroscopic image data. Therefore, according to the X-ray inspection system 1 of this embodiment, it is possible to obtain an X-ray fluoroscopic image Ix (added X-ray fluoroscopic image or average X-ray fluoroscopic image) with clear image quality without irradiating the object to be inspected with a relatively high dose of X-rays, thereby reliably ensuring the safety of inspectors, etc.

[0088] Furthermore, in the X-ray inspection system 1 according to this embodiment, the X-ray generator 11 does not need to generate a high dose of X-rays, and as a result, the entire apparatus can be made compact.

[0089] In addition, in the X-ray inspection system 1 according to this embodiment, it is possible to display an X-ray fluoroscopic image on the display unit 23 without the need to separately prepare a dedicated scanner or the like, as in the conventional X-ray inspection device (JP Patent Publication No. 10-038818), thereby making it possible to improve the efficiency of the inspection work.

[0090] In addition, the X-ray inspection system 1 of this embodiment further includes a support member 15 having an inspection object mounting section 17 that can be freely attached and detached to the inspection object, an X-ray generator holding section 18 that holds the X-ray generator 11, and an X-ray detector holding section 16 that holds the X-ray detector 12 so as to face the X-ray generator 18 held by the X-ray generator holding section 18, and the X-ray generator holding section 18 has a moving mechanism (rod-shaped cross member 18C and slider member 18D1, etc.) that can move the X-ray generator 11 along the outer surface of the inspection object with the inspection object mounting section 17 attached to the inspection object.

[0091] That is, in this embodiment, after the X-ray inspection device 10 is set on the object to be inspected via the support member 15, the X-ray generator 11 can be moved, so that the X-ray irradiation position on the object to be inspected can be appropriately changed (see FIG. 3). Therefore, according to the X-ray inspection system 1 of this embodiment, it is possible to photograph the object to be inspected from the desired angle simply by moving the X-ray generator 11 along the outer surface of the object to be inspected, without the trouble of reattaching the X-ray inspection device 10 to the object to be inspected, thereby reliably improving the efficiency of the inspection work.

[0092] Furthermore, in the X-ray inspection system 1 of this embodiment, the object to be inspected is a steel pipe O having a welded portion Ow welded along the circumferential direction, and the moving mechanism composed of the slider member 18A, the rod-shaped cross member 18C, etc. is configured to be able to move the X-ray generator 11 along the tube axis direction of the object to be inspected.

[0093] That is, in this embodiment, by simply moving the X-ray generator 11 attached to the steel pipe O, it is possible to take an image to obtain an X-ray fluoroscopy image Ix (see "weld projection image Iw1" in Figure 3) showing a single weld Ow, or to take an X-ray fluoroscopy image Ix (see "weld projection images Iw2a, Iw2b" in Figure 3 and "X-ray fluoroscopy image Ix" in Figure 8) showing the entire circumference of the weld Ow welded along the circumferential direction of the steel pipe O. Therefore, according to the X-ray inspection system 1 of this embodiment, it is possible to photograph the welded portion Ow from the desired angle without the need to take the trouble of reattaching the X-ray generator 11 to the steel pipe O, thereby improving the efficiency of inspection work.

[0094] In addition, in the X-ray inspection system 1 of this embodiment, the input unit 24 is capable of accepting a third operation input for plotting two input points (a first input point P1 and a second input point P2) on the X-ray fluoroscopic image Ix displayed on the display unit 23, and the display control unit 21B has a profile image data generation unit 21B3 that generates profile image data of the X-ray fluoroscopic image Ix between the two input points when a third operation input is performed on the input unit 24, and performs control to display on the display unit 23 a profile image Ip corresponding to the profile image data generated by the profile image data generation unit 21B3.

[0095] That is, in this embodiment, the profile image data is generated based on X-ray fluoroscopic image data (detection results detected by the X-ray detector 12), so that a profile image Ip consisting of accurate values ​​can be displayed on the display unit 23. Therefore, according to the X-ray inspection system 1 of this embodiment, it is possible to confirm the normality of the X-ray detector 12, and when measuring the size of defects in the weld Ow, it is possible to numerically evaluate them based on accurate values.

[0096] <Other Modifications> In the above embodiment, the X-ray inspection apparatus 10 (X-ray generator 11 and X-ray detector 12) was attached to the steel pipe O using the support member 15, but for example, only the X-ray generator 11 may be attached to the steel pipe O using the support member 15, or it is also possible to attach it to the periphery of the steel pipe O without using such a support member 15.

[0097] In the above embodiment, the profile image Ip is displayed on the display unit 23 alongside the X-ray fluoroscopic image Ix, but it may be displayed separately on a separate screen.

[0098] Although the embodiment to which the invention made by the inventor is applied has been described above, the invention is not limited by the description and drawings which form part of the disclosure of the invention according to the embodiment. In other words, it should be added that all other embodiments, examples, and operation techniques made by those skilled in the art based on the embodiment are naturally included in the scope of the invention. [Explanation of symbols]

[0099] 1: X-ray inspection system 10: X-ray inspection equipment 11: X-ray generator (X-ray irradiation means) 11A: X-ray irradiation section 12: X-ray detector (X-ray receiving means) 13: Communications Department 14: Bus 15: Support member (support means) 16: X-ray detector holder (X-ray image receiving means holder) 16A: Plate-shaped member 16B: X-ray detector clamp 17: Inspection object mounting part 17A: U-bolt 17B: Fastening member 18: X-ray generator holder (X-ray irradiation means holder) 18A: Slider member 18B: Fastening member 18C: Rod-shaped cross member (moving mechanism) 18D: X-ray generator clamping member 18D1: Slider member (moving mechanism) 18D2: Plate-shaped member 18D3: Fastening parts 18D4: X-ray generator clamp 19A: Support member 19B: Upper cross member 19C: Middle cross member 20: Control device 21: Central control unit 21A: X-ray photography control unit 21B: Display control unit (display control means) 21B1: First image data generating unit 21B2: Second image data generating unit 21B3: Profile image data generating unit 22: Storage unit (storage means) 23:Display section (display means) 24: Input section (input means) 25: Communications Department 26: Bus O: Steel pipe (inspection object) Ow: Welded part Ix: X-ray fluoroscopic image Ip:Profile picture Iw1, Iw2a, Iw2b: Projected images of welds P1: First input point P2: Second input point L: Line I1~I7: Icon

Claims

1. An X-ray irradiation means for irradiating an object to be inspected with X-rays in a plurality of divided doses; an X-ray receiving means for receiving an image of the X-rays transmitted through the inspection object; a storage means for storing a plurality of X-ray fluoroscopic image data corresponding to the X-rays received by the X-ray receiving means in a plurality of times; a display means capable of displaying an X-ray fluoroscopic image based on the X-ray fluoroscopic image data stored in the storage means; An input means for accepting input of various information; A display control means for controlling the display means; Equipped with the input means is capable of receiving a first operation input for adding and synthesizing a plurality of X-ray fluoroscopic image data stored in the storage means and a second operation input for averaging the data; The display control means a first image data generating unit that generates the additively synthesized X-ray fluoroscopic image data by additively synthesizing a plurality of X-ray fluoroscopic image data when the first operation input is performed on the input means; a second image data generating unit that, when the second operation input is performed on the input means, averages a plurality of X-ray fluoroscopic image data to generate the averaged X-ray fluoroscopic image data; having An X-ray inspection system that controls the display means to display an X-ray fluoroscopic image corresponding to the X-ray fluoroscopic image data generated by the first image data generation unit or the second image data generation unit.

2. an inspection object attachment part that is detachably attached to the inspection object; an X-ray irradiation means holding section for holding the X-ray irradiation means; an X-ray receiving means holding section that holds the X-ray receiving means so as to face the X-ray irradiating means held by the X-ray irradiating means holding section; and a support means having the following structure:

2. The X-ray inspection system according to claim 1, wherein the X-ray irradiating means holding section has a moving mechanism capable of moving the X-ray irradiating means along an outer surface of the inspection object in a state in which the inspection object mounting section is attached to the inspection object.

3. The inspection object is a steel pipe having a welded portion welded along a circumferential direction, The X-ray inspection system according to claim 2 , wherein the moving mechanism is configured to be capable of moving the X-ray irradiating means along a tube axial direction of the inspection object.

4. the input means is capable of accepting a third operation input for plotting two input points on the X-ray fluoroscopic image displayed on the display means; The display control means a profile image data generating unit that generates profile image data of an X-ray fluoroscopic image between two of the input points when the third operation input is performed on the input means, 4. An X-ray inspection system according to claim 1, further comprising control for causing the display means to display a profile image corresponding to the profile image data generated by the profile image data generation unit.

Images