Defect detecting and positioning device

Abstract

The utility model relates to a defect detecting and positioning device, belongs to the technical field of defect positioning, and solves the problem that the specific position of a defect is difficult to quickly and accurately determine in the prior art. The defect detection positioning device comprises a ray imaging device, an objective table and a laser indicator, and the objective table is used for bearing a workpiece to be detected; the ray imaging device comprises a ray source and a detector which are oppositely arranged, and a central ray beam of the ray source coincides with the central axis of the detector; the laser indicator is fixedly arranged on one side of the ray source, and the position of laser emitted by the laser indicator on the workpiece is the same as the position of ray beams emitted by the ray source of the imaging device on the workpiece. According to the defect detecting and positioning device, the laser indicator is additionally arranged, so that a visual positioning reference is provided for an operator, and rapid visual positioning of defects is realized.

Description

Technical Field

[0001] This utility model relates to the field of defect location technology, and in particular to a defect detection and location device. Background Technology

[0002] Digital radiographic nondestructive testing (DRT) technology has been widely used in industry. By using X-rays to image a workpiece, its quality can be determined based on the radiographic image, enabling nondestructive testing. After identifying the location and type of defects on the radiographic image, their actual position in the workpiece's three-dimensional space needs to be determined, and repair procedures can be carried out based on the defect's location and type.

[0003] Traditional X-ray inspection equipment typically only includes an X-ray source and a detector, lacking precise positioning indicators, making it difficult for operators to quickly and accurately determine the specific location of defects.

[0004] Meanwhile, since X-ray images are two-dimensional, for cylindrical workpieces, when acquiring X-ray images using existing X-ray inspection equipment, it is necessary to acquire multiple X-ray images from the same position of the workpiece at multiple angles to obtain the spatial information of the workpiece and determine the three-dimensional spatial location of the defect. This operation is complex and inefficient. Utility Model Content

[0005] Based on the above analysis, the present invention aims to provide a defect detection and positioning device to solve the problem that the existing technology is unable to quickly and accurately determine the specific location of defects.

[0006] This invention provides a defect detection and location device, which includes: a X-ray imaging device, a stage, and a laser pointer.

[0007] The stage is used to support the workpiece to be inspected; the X-ray imaging device includes an X-ray source and a detector arranged opposite to each other, the central X-ray beam of the X-ray source coincides with the central axis of the detector; the laser pointer is fixedly arranged on one side of the X-ray source, and the position where the laser emitted by the laser pointer illuminates the workpiece is the same as the position where the central X-ray beam emitted by the X-ray source of the imaging device illuminates the workpiece.

[0008] Based on the further improvement of the defect detection and positioning device described above, the laser beam emitted by the laser indicator has a circular or cross-shaped spot.

[0009] Based on the further improvement of the above-mentioned defect detection and positioning device, the workpiece is a cylindrical part, and the width of the detector is smaller than the diameter of the cylindrical part.

[0010] Based on the further improvement of the defect detection and positioning device described above, the defect detection and positioning device further includes: a first motion mechanism, which is connected to the detector to drive the detector to move in the horizontal and vertical directions.

[0011] Based on the further improvement of the defect detection and positioning device described above, the defect detection and positioning device further includes: a second motion mechanism, which is connected to the X-ray source to drive the X-ray source and the laser indicator to move in the horizontal and vertical directions.

[0012] Based on the further improvement of the above-mentioned defect detection and positioning device, both the first motion mechanism and the second motion mechanism include: an X-axis translation mechanism, a Y-axis translation mechanism and a Z-axis translation mechanism, wherein the detector or the laser source is disposed on the Z-axis translation mechanism, the Z-axis translation mechanism is disposed on the Y-axis translation mechanism, and the Y-axis translation mechanism is disposed on the X-axis translation mechanism;

[0013] The X-axis and Y-axis are two mutually perpendicular axes on the horizontal plane, and the Z-axis is the vertical axis.

[0014] Based on the further improvement of the defect detection and positioning device described above, the defect detection and positioning device further includes: a third motion mechanism, which is connected to the stage to drive the stage to move horizontally and to drive the stage to rotate.

[0015] Based on the further improvement of the above-mentioned defect detection and positioning device, the third motion mechanism includes: a motion platform, a translation mechanism and a rotation mechanism. The stage is rotatably mounted on the motion platform, the rotation mechanism is mounted on the motion platform, the rotation mechanism is connected to the stage to drive the stage to rotate, and the translation mechanism drives the motion platform to move in the horizontal direction.

[0016] Based on the further improvement of the defect detection and positioning device described above, the defect detection and positioning device further includes: a controller, which is connected to the first motion mechanism, the second motion mechanism and the third motion mechanism respectively to control them to perform corresponding operations.

[0017] Based on the further improvement of the defect detection and location device described above, the radiation source is an X-ray source.

[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0019] 1. The defect detection and positioning device of this utility model adds a laser indicator. The laser indicator is fixed on one side of the X-ray source, and the laser emitted by it is aligned with the position of the X-ray beam of the X-ray source on the workpiece, providing the operator with an intuitive positioning reference and realizing rapid visual positioning of defects.

[0020] 2. This utility model provides a defect detection and positioning device suitable for cylindrical parts. When performing radiographic imaging, the X-ray source is located outside the cylindrical part, and the detector is inserted into the inside of the cylindrical part, thereby realizing radiographic imaging of the cylindrical part wall.

[0021] 3. In this utility model, the detector, the X-ray source, and the stage are driven by independent motion mechanisms, so that the X-ray source and the detector can perform comprehensive radiographic imaging around the cylindrical wall of the cylindrical part. The independent motion mechanism provides the defect detection and positioning device with higher flexibility, stability, detection efficiency and ease of operation.

[0022] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing this invention. The objectives and other advantages of this invention can be realized and obtained from the details specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0023] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0024] Figure 1 This is a schematic diagram of the defect detection and location device according to an embodiment of the present invention.

[0025] Figure label:

[0026] 1-Detector; 2-X-ray source; 3-Laser pointer; 4-Stage;

[0027] 5 - First kinematic mechanism; 6 - Second kinematic mechanism; 7 - Third kinematic mechanism. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0029] A specific embodiment of this utility model discloses a defect detection and location device, such as... Figure 1As shown in the diagram. The defect detection and positioning device includes: a radiographic imaging device, a stage 4, and a laser pointer 3. The stage 4 is used to support the workpiece to be inspected; the radiographic imaging device includes a radiographic source 2 and a detector 1 arranged opposite to each other, with the central beam of the radiographic source 2 coinciding with the central axis of the detector 1; the laser pointer 3 is fixedly disposed on one side of the radiographic source 2, and the position where the laser emitted by the laser pointer 3 illuminates the workpiece is the same as the position where the radiographic beam emitted by the radiographic source 2 illuminates the workpiece.

[0030] Specifically, the laser beam emitted by the laser pointer 3 has a circular or cross-shaped spot. This circular or cross-shaped spot provides a clear visual indication, allowing the user to accurately locate defects or transmission points. 。

[0031] Compared with the prior art, the defect detection and positioning device of this utility model adds a laser indicator 3. The laser indicator 3 is fixed on one side of the X-ray source 2, and the laser emitted by it is aligned with the position of the X-ray beam of the X-ray source 2 on the workpiece, providing the operator with an intuitive positioning reference and realizing rapid visual positioning of defects.

[0032] Specifically, the radiation source 2 is an X-ray source. X-rays have high energy and strong penetrating power, making them suitable for industrial radiation detection. Furthermore, depending on different detection requirements, the radiation source 2 can also be an alpha-ray source, beta-ray source, gamma-ray source, or neutron source, etc.

[0033] In one embodiment, the workpiece is a cylindrical part, and the width of the detector 1 is smaller than the diameter of the cylindrical part.

[0034] Compared with the prior art, this embodiment provides a defect detection and positioning device suitable for cylindrical parts. When performing radiographic imaging, the X-ray source 2 is located outside the cylindrical part, and the detector 1 is inserted into the inside of the cylindrical part, thereby realizing radiographic imaging of the cylindrical part wall.

[0035] Specifically, the defect detection and positioning device further includes a first motion mechanism 5, which is connected to the detector 1 to drive the detector 1 to move horizontally and vertically. Specifically, the first motion mechanism 5 drives the detector 1 to move horizontally to adjust the distance between the detector 1 and the radiation source 2 or the cylinder wall, and the first motion mechanism 5 drives the detector 1 to move vertically to adjust the height of the detector 1.

[0036] Specifically, the defect detection and positioning device further includes a second motion mechanism 6, which is connected to the X-ray source 2 to drive the X-ray source 2 and the laser indicator 3 to move horizontally and vertically. Specifically, the second motion mechanism 6 drives the X-ray source 2 to move horizontally to adjust the distance between the X-ray source 2 and the detector 1 or the cylinder wall, and the second motion mechanism 6 drives the X-ray source 2 to move vertically to adjust the height of the detector 1.

[0037] More specifically, both the first motion mechanism 5 and the second motion mechanism 6 include: an X-axis translation mechanism, a Y-axis translation mechanism, and a Z-axis translation mechanism. The detector 1 or the laser source is disposed on the Z-axis translation mechanism, the Z-axis translation mechanism is disposed on the Y-axis translation mechanism, and the Y-axis translation mechanism is disposed on the X-axis translation mechanism. Here, the X-axis and Y-axis are two mutually perpendicular axes on a horizontal plane, and the Z-axis is a vertical axis.

[0038] By setting translation mechanisms on three mutually perpendicular axes, the detector 1 or the laser source can be positioned accurately and flexibly in three-dimensional space.

[0039] Specifically, the defect detection and positioning device further includes a third motion mechanism 7, which is connected to the platform 4 to drive the platform 4 to move horizontally and rotate.

[0040] More specifically, the third motion mechanism 7 includes: a motion platform, a translation mechanism, and a rotation mechanism. The platform 4 is rotatably mounted on the motion platform. The rotation mechanism is mounted on the motion platform and connected to the platform 4 to drive the platform 4 to rotate. The translation mechanism drives the motion platform to move in the horizontal direction.

[0041] By combining translation and rotation mechanisms, the stage 4 can be moved and rotated in the horizontal direction. The translation mechanism drives the motion platform to move in the horizontal direction, which can quickly change the position of the workpiece, while the rotation mechanism can adjust the detection angle of the workpiece, so that the detector 1 and the X-ray source 2 can perform radiographic imaging of various areas of the cylindrical part. The combination of the two can significantly improve the detection efficiency.

[0042] In practice, the translation mechanism of the third motion mechanism 7 can be an X-axis translation mechanism, a Y-axis translation mechanism, or a combination of an X-axis translation mechanism and a Y-axis translation mechanism.

[0043] In this embodiment, the detector 1, the X-ray source 2, and the stage 4 are driven by independent motion mechanisms, so that the X-ray source 2 and the detector 1 can perform full-scale radiographic imaging around the cylindrical wall of the cylindrical part. The independent motion mechanisms provide the defect detection and positioning device with higher flexibility, stability, detection efficiency, and ease of operation.

[0044] Specifically, the defect detection and positioning device further includes a controller, which is connected to the first motion mechanism 5, the second motion mechanism 6, and the third motion mechanism 7 respectively to control them to perform corresponding operations. By setting up the controller, the operation process can be automated, reducing manual intervention and improving detection efficiency and accuracy.

[0045] The following describes the specific steps for locating defects in cylindrical parts using the defect detection and positioning device of this utility model.

[0046] Step 1: Divide the cylindrical part into multiple imaging areas according to the imaging area of ​​the imaging device, move the imaging device to the initial position, so that the detector 1 is located inside the cylindrical part and the laser source is located outside the cylindrical part. Then, starting from the initial position, the imaging device performs single-wall transmission imaging on each imaging area of ​​the cylindrical part in sequence according to the preset scanning path to obtain a single image of each imaging area.

[0047] Step 2: Stitch the single images into a single image according to the scanning path to obtain the stitched image;

[0048] Step 3: Identify defects in the stitched image and obtain the location of the defects in the stitched image;

[0049] Step 4: Obtain the position of the defect on the cylindrical component based on the position of the defect on the stitched image;

[0050] Step 5: Based on the position of the defect on the stitched image and the imaging parameters of the imaging device, obtain the position of the defect image on the stitched image;

[0051] Step 6: Determine the position of the imaging device when acquiring the defect image based on the position of the defect image on the stitched image and the scanning path;

[0052] Step 7: Obtain the indicated position based on the position of the defect in the target area and the position of the defect image acquired by the imaging device;

[0053] Step 8: Move the imaging device to the indicated position, so that the laser emitted by the laser indicator 3 marks the defect on the cylindrical part.

[0054] The direction of movement between each scanning point on the scanning path includes the rotation of the cylindrical component with its central axis as the axis of rotation and the vertical translation of the imaging device.

[0055] Specifically, the scanning path can be such that the imaging device starts from one end (top or bottom) of the cylindrical component and sequentially performs transillumination imaging on the imaging area at each height. After completing transillumination imaging at one height, the imaging device moves to the next height until transillumination imaging of the other end of the cylindrical component is completed. Specifically, after moving to a preset height, the imaging device first performs transillumination imaging on the imaging area corresponding to the initial position to acquire a single image of that area. Then, the cylindrical component or the imaging device rotates by a preset angle to sequentially perform transillumination imaging on adjacent imaging areas until a full rotation is completed, thus completing transillumination imaging of all imaging areas at that height.

[0056] Those skilled in the art will understand that the program / software involved in the controller controlling the motion mechanism in the above embodiments is a common method in the prior art, and this utility model does not involve any software improvements. This utility model only requires connecting the various devices with corresponding functions through the connection relationships given in the embodiments of this utility model, which does not involve any program or software improvements. As for the connection methods between the various hardware devices with corresponding functions, they can all be implemented by those skilled in the art using existing technology, and will not be described in detail here.

[0057] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A defect detection and location device, characterized in that, The defect detection and location device includes: a X-ray imaging device, a stage, and a laser pointer. The stage is used to support the workpiece to be inspected; the X-ray imaging device includes an X-ray source and a detector arranged opposite to each other, the central X-ray beam of the X-ray source coincides with the central axis of the detector; the laser pointer is fixedly arranged on one side of the X-ray source, and the position where the laser emitted by the laser pointer illuminates the workpiece is the same as the position where the central X-ray beam emitted by the X-ray source of the imaging device illuminates the workpiece.

2. The defect detection and location device according to claim 1, characterized in that, The laser beam emitted by the laser pointer has a circular or cross-shaped spot.

3. The defect detection and location device according to claim 1 or 2, characterized in that, The workpiece is a cylindrical part, and the width of the detector is smaller than the diameter of the cylindrical part.

4. The defect detection and location device according to claim 3, characterized in that, The defect detection and positioning device further includes a first motion mechanism, which is connected to the detector to drive the detector to move in the horizontal and vertical directions.

5. The defect detection and location device according to claim 4, characterized in that, The defect detection and positioning device further includes a second motion mechanism, which is connected to the X-ray source to drive the X-ray source and the laser indicator to move in the horizontal and vertical directions.

6. The defect detection and location device according to claim 5, characterized in that, Both the first motion mechanism and the second motion mechanism include: an X-axis translation mechanism, a Y-axis translation mechanism and a Z-axis translation mechanism, wherein the detector or laser source is disposed on the Z-axis translation mechanism, the Z-axis translation mechanism is disposed on the Y-axis translation mechanism, and the Y-axis translation mechanism is disposed on the X-axis translation mechanism; The X-axis and Y-axis are two mutually perpendicular axes on the horizontal plane, and the Z-axis is the vertical axis.

7. The defect detection and location device according to claim 5, characterized in that, The defect detection and positioning device further includes a third motion mechanism, which is connected to the stage to drive the stage to move horizontally and rotate.

8. The defect detection and location device according to claim 7, characterized in that, The third motion mechanism includes a motion platform, a translation mechanism, and a rotation mechanism. The platform is rotatably mounted on the motion platform. The rotation mechanism is mounted on the motion platform and connected to the platform to drive the platform to rotate. The translation mechanism drives the motion platform to move horizontally.

9. The defect detection and location device according to claim 7, characterized in that, The defect detection and positioning device further includes a controller, which is connected to the first motion mechanism, the second motion mechanism and the third motion mechanism respectively to control them to perform corresponding operations.

10. The defect detection and location device according to claim 1 or 2, characterized in that, The radiation source is an X-ray source.

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