X-RAY-based 360-degree plane 3D detection system and detection method
阅读说明：本技术 一种基于x-ray的360度平面3d检测系统及检测方法 (X-RAY-based 360-degree plane 3D detection system and detection method ) 是由 徐钻 于 2020-07-01 设计创作，主要内容包括：本申请涉及X光应用设备技术领域,尤其涉及一种基于X-RAY的360度平面3D检测方法及检测系统,该检测系统包括机壳、X光发射装置、影像接收装置和计算机处理装置,计算机处理装置与影像接收装置相连接,机壳设有工作台,X光发射装置与影像接收装置沿竖直方向间隔设于机壳内,且X光发射装置用于朝向影像接收装置发射X光；工作台位于X光发射装置与影像接收装置之间；还包括第一驱动装置和第二驱动装置,第一驱动装置用于驱动影像接收装置水平移动,以使影像接收装置可沿平行于工作台平面的方向绕X光发射装置的发射中心竖直投影旋转。本申请结构稳定,能够实现对产品内部缺陷的良好识别。(The application relates to the technical field of X-RAY application equipment, in particular to a 360-degree plane 3D detection method and a detection system based on X-RAY, wherein the detection system comprises a machine shell, an X-RAY emitting device, an image receiving device and a computer processing device, the computer processing device is connected with the image receiving device, the machine shell is provided with a workbench, the X-RAY emitting device and the image receiving device are arranged in the machine shell at intervals along the vertical direction, and the X-RAY emitting device is used for emitting X-RAYs towards the image receiving device; the workbench is positioned between the X-ray emitting device and the image receiving device; the X-ray projection device also comprises a first driving device and a second driving device, wherein the first driving device is used for driving the image receiving device to horizontally move so that the image receiving device can vertically project and rotate around the emission center of the X-ray emission device along the direction parallel to the plane of the workbench. This application stable in structure can realize the good discernment to product internal defect.)
1. A360-degree plane 3D detection method based on X-RAY is characterized in that: the method comprises the following steps:
s1, placing the product between the X-ray emitting device (2) and the image receiving device (3) to make the positions of the X-ray emitting device (2) and the image receiving device (3) align with the detection area of the product;
s2, the X-ray emitting device (2) emits X-rays to the product, and the image receiving device (3) receives a plurality of scanning images of the product by the X-rays in the same plane at different angles by taking a projection point of a fixed radius around the emitting center of the X-ray emitting device (2) as a circle center;
and S3, transmitting the multiple scanned images received in the step S2 to a computer processing device, processing the multiple scanned images by the computer processing device, and obtaining a 3D image in a mode of gray level overlapping, repeated overlapping and repeated de-duplication.
2. A360-degree plane 3D detection method based on X-RAY is characterized in that: in step S2, the number of scanned images received by the image receiving device (3) is an integer multiple of 4.
3. A360-degree plane 3D detection system based on X-RAY is characterized in that: the 360-degree plane 3D detection method based on the X-RAY comprises a machine shell (1), an X-RAY emitting device (2), an image receiving device (3) and a computer processing device, wherein the computer processing device is connected with the image receiving device (3), a workbench (8) is horizontally arranged in the machine shell (1), the X-RAY emitting device (2) and the image receiving device (3) are arranged in the machine shell (1) at intervals along the vertical direction, and the X-RAY emitting device (2) is used for emitting X-RAYs towards the image receiving device (3); the workbench (8) is positioned between the X-ray emitting device (2) and the image receiving device (3);
the X-ray imaging device further comprises a first driving device (5) and a second driving device (6), wherein the first driving device (5) is used for driving the image receiving device (3) to move horizontally, so that the image receiving device (3) can rotate around the vertical projection of the emission center of the X-ray emission device (2) along the direction parallel to the plane of the workbench (8);
the second driving device (6) is used for driving the X-ray emitting device (2) to move horizontally, so that the position of the X-ray emitting device (2) can correspond to the detection area of the product.
4. The X-RAY based 360 degree planar 3D detection system of claim 3, wherein: the first driving device (5) comprises an X-axis moving plate (52), an X-axis driving mechanism (51), a Y-axis moving plate (54) and a Y-axis driving mechanism (53), and the X-axis moving plate (52) is connected to the machine shell (1) in a sliding mode along the length direction of the machine shell (1);
the X-axis driving mechanism (51) is arranged between the X-axis moving plate (52) and the machine shell (1) and is used for driving the X-axis moving plate (52) to move along the length direction of the machine shell (1);
the Y-axis moving plate (54) is connected to the X-axis moving plate (52) in a sliding manner along the width direction of the machine shell (1), and the image receiving device (3) is connected to the Y-axis moving plate (54);
the Y-axis driving mechanism (53) is arranged between the X-axis moving plate (52) and the Y-axis moving plate (54) and used for driving the Y-axis moving plate (54) to move along the width direction of the machine shell (1).
5. The X-RAY based 360 degree planar 3D detection system of claim 4, wherein: the first driving device (5) further comprises a Z-axis moving plate (56) and a Z-axis driving mechanism (55), and the Z-axis moving plate (56) is connected to the Y-axis moving plate (54) in a sliding mode along the vertical direction;
the image receiving device (3) is arranged on the Z-axis moving plate (56) so as to realize the connection between the image receiving device (3) and the Y-axis moving plate (54) through the Z-axis moving plate (56);
the Z-axis driving mechanism (55) is arranged between the Z-axis moving plate (56) and the Y-axis moving plate (54) and used for driving the Z-axis moving plate (56) to move along the vertical direction.
6. The X-RAY based 360 degree planar 3D detection system of claim 4, wherein: the X-axis driving mechanism (51) comprises an X-axis screw rod sliding table (511) and an X-axis driving motor (512), and the X-axis screw rod sliding table (511) is arranged on the side wall of the machine shell (1) along the length direction of the machine shell (1);
an X-axis sliding rail (9) is arranged on the side wall of the machine shell (1) opposite to the X-axis screw rod sliding table (511), and an X-axis sliding block (91) is arranged on the X-axis sliding rail (9);
one end of the X-axis moving plate (52) is connected to a sliding block of the X-axis screw rod sliding table (511), and the other end of the X-axis moving plate is connected to an X-axis sliding block (91) on the X-axis sliding rail (9);
the X-axis driving motor (512) is connected to one end of a screw rod of the X-axis screw rod sliding table (511) and used for driving the screw rod of the X-axis screw rod sliding table (511) to rotate.
7. The X-RAY based 360 degree planar 3D detection system of claim 4, wherein: the Y-axis driving mechanism (53) comprises a Y-axis screw rod sliding table (531) and a Y-axis driving motor (532), and the Y-axis screw rod sliding table (531) is arranged on the X-axis moving plate (52) along the width direction of the machine shell (1);
the Y-axis moving plate (54) is arranged on a slide block of the Y-axis screw rod sliding table (531) to realize sliding connection between the Y-axis moving plate (54) and the X-axis moving plate (52);
and the Y-axis driving motor (532) is arranged at one end of the X-axis moving plate (52) and is used for driving a screw rod of the Y-axis screw rod sliding table (531) to rotate.
8. The X-RAY based 360 degree planar 3D detection system of claim 5, wherein: the Z-axis driving mechanism (55) comprises a Z-axis screw rod sliding table (551) and a Z-axis driving motor (552), and the Z-axis screw rod sliding table (551) is arranged on the Y-axis moving plate (54) along the vertical direction;
the Z-axis moving plate (56) is arranged on a slide block of the Z-axis screw rod sliding table (551) to realize the sliding connection between the Z-axis moving plate (56) and the Y-axis moving plate (54);
and the Z-axis driving motor (552) is connected to one end of a screw rod of the Z-axis screw rod sliding table (551) and is used for driving the screw rod of the Z-axis screw rod sliding table (551) to rotate.
9. The X-RAY based 360 degree planar 3D detection system of claim 4, wherein: the device is characterized by further comprising an auxiliary positioning device (7), wherein the auxiliary positioning device (7) comprises a laser fixing seat (71) and a laser emitter (72), and the laser fixing seat (71) is connected to the Y-axis moving plate (54); the laser emitter (72) is arranged on the laser fixing seat (71).
Technical Field
The application relates to the technical field of X-RAY application equipment, in particular to a 360-degree plane 3D detection system and a detection method based on X-RAY.
Background
In recent years, with the rapid development of the electronic industry, the printed circuit board (PCB for short) industry has a development trend of continuous high-speed growth. The quality of the PCB is directly dependent on the quality of each line and each hole on the circuit board. On one circuit board, there are thousands of lines and holes, and if any one of them has quality problems such as too thin, too thick, incomplete, pin hole, adhesion, disconnection, dislocation, etc., it will affect the final product quality, so the PCB detection is very important.
At present, an X-RAY detection system is generally used for detecting the PCB and mainly comprises a bearing platform, an X-RAY emitting device, an image receiving device and a computer processing device, wherein the bearing platform is used for bearing the PCB to be detected, and the X-RAY emitting device and the image receiving device are respectively arranged on the upper side and the lower side of the bearing platform; the computer processing device is connected with the image receiving device.
The X-ray emitting device is used for emitting X-rays towards the supporting platform, the X-rays are used for carrying out tomography scanning on a detection area of the PCB, the image receiving device receives an image obtained by X-ray scanning and transmits the image to the computer processing device, and the computer processing device simulates image data by utilizing the gray level bit depth relation of the image and displays the image data into a 3D image convenient for comparison. This method can be used for very regular products such as electronic components, IC, die cast internal nondestructive inspection applications of aluminum, etc.
In view of the above-mentioned related art, the inventor believes that when the image receiving device is used for a complex product, the image received by the image receiving device is prone to have too many gray scales, which may result in poor simulation effect of the computer processing device on the image, thereby affecting the accuracy of identifying the internal defect of the product.
Disclosure of Invention
In a first aspect, the present application provides a 360-degree planar 3D detection method based on X-RAY, which adopts the following technical scheme:
a360-degree plane 3D detection method based on X-RAY comprises the following steps:
s1, placing the product between the X-ray emitting device and the image receiving device, and aligning the positions of the X-ray emitting device and the image receiving device to the detection area of the product;
s2, the X-ray emitting device emits X-rays to the product, and the image receiving device receives a plurality of scanning images of the product by the X-rays in the same plane at different angles by taking a projection point with a fixed radius around the emitting center of the X-ray emitting device as a circle center;
and S3, transmitting the multiple scanned images received in the step S2 to a computer processing device, processing the multiple scanned images by the computer processing device, and obtaining a 3D image in a mode of gray level overlapping, repeated overlapping and repeated de-duplication.
By adopting the technical scheme, aiming at one detection point of the product, the image receiving device is used for rotating around the projection point of the emission center of the X-ray emission device on the same plane, so that the image receiving device can receive the scanning images of a plurality of X-rays to the product in different angles; a plurality of scanning images are conveyed into a computer processing device, and the computer processing device synthesizes the plurality of scanning images to obtain a 3D image of a product detection point by utilizing a mode of gray level overlapping, repeated overlapping and repeated duplication removal, so that the influence of excessive gray levels on the image is reduced, and the identification accuracy of the internal defects of the product is improved.
Preferably, in step S2, the number of scanned images received by the image receiving device is an integer multiple of 4.
By adopting the technical scheme, the number of the scanned images received by the image receiving device is set to be integral multiple of 4, so that the scanned images can be well synthesized conveniently.
In a second aspect, the present application provides an X-RAY based 360-degree planar 3D detection system, which is used for implementing the above X-RAY based 360-degree planar 3D detection method, and adopts the following technical solutions:
a360-degree plane 3D detection system based on X-RAY comprises a machine shell, an X-RAY emitting device, an image receiving device and a computer processing device, wherein the computer processing device is connected with the image receiving device, a workbench is horizontally arranged in the machine shell, the X-RAY emitting device and the image receiving device are arranged in the machine shell at intervals along the vertical direction, and the X-RAY emitting device is used for emitting X-RAYs towards the image receiving device; the workbench is positioned between the X-ray emitting device and the image receiving device; the X-ray projection device comprises an X-ray emitting device, a first driving device and a second driving device, wherein the first driving device is used for driving the image receiving device to horizontally move so that the image receiving device can vertically project and rotate around the emitting center of the X-ray emitting device along the direction parallel to the plane of the workbench; the second driving device is used for driving the X-ray emitting device to move horizontally, so that the position of the X-ray emitting device can correspond to the detection area of the product.
By adopting the technical scheme, the product is placed on the workbench, and the image receiving device and the X-ray emitting device can be driven to align to the detection area of the product under the driving action of the first driving device and the second driving device; then, the image receiving device can rotate around the vertical projection of the emission center of the X-ray emission device with a fixed radius under the driving action of the first driving device, so that the image receiving device can receive the scanning images of a plurality of X-rays to the product in the same horizontal plane at different angles, and the acquisition of a plurality of images in the same detection area is realized.
Preferably, the first driving device comprises an X-axis moving plate, an X-axis driving mechanism, a Y-axis moving plate and a Y-axis driving mechanism, and the X-axis moving plate is connected to the machine shell in a sliding manner along the length direction of the machine shell; the X-axis driving mechanism is arranged between the X-axis moving plate and the shell and used for driving the X-axis moving plate to move along the length direction of the shell; the Y-axis moving plate is connected to the X-axis moving plate in a sliding manner along the width direction of the shell, and the image receiving device is connected to the Y-axis moving plate; the Y-axis driving mechanism is arranged between the X-axis moving plate and the Y-axis moving plate and used for driving the Y-axis moving plate to move along the width direction of the machine shell.
By adopting the technical scheme, the X-axis driving mechanism can drive the image receiving device to move along the length direction of the casing, the Y-axis driving mechanism can drive the image receiving device to move along the width direction of the casing, so that the image receiving device moves to the position corresponding to the product detection area under the driving action of the first driving device, and meanwhile, the image receiving device can be driven to rotate around the projection point of the emission center of the X-ray emission device.
Preferably, the first driving device further comprises a Z-axis moving plate and a Z-axis driving mechanism, and the Z-axis moving plate is connected to the Y-axis moving plate in a sliding manner along the vertical direction; the image receiving device is arranged on the Z-axis moving plate so as to realize the connection of the image receiving device and the Y-axis moving plate through the Z-axis moving plate; the Z-axis driving mechanism is arranged between the Z-axis moving plate and the Y-axis moving plate and used for driving the Z-axis moving plate to move along the vertical direction.
By adopting the technical scheme, the image receiving device is arranged on the Z-axis moving plate, so that the image receiving device is connected with the Y-axis moving plate; meanwhile, the Z-axis driving device can drive the image receiving device to move along the vertical direction, so that the effect of adjusting the distance between the image receiving device and the X-ray emitting device is achieved, and the size of the finally received scanned image is adjusted.
Preferably, the X-axis driving mechanism comprises an X-axis screw rod sliding table and an X-axis driving motor, and the X-axis screw rod sliding table is arranged on the side wall of the machine shell along the length direction of the machine shell; an X-axis slide rail is arranged on the side wall of the machine shell opposite to the X-axis screw rod sliding table, and an X-axis slide block is arranged on the X-axis slide rail; one end of the X-axis moving plate is connected to a sliding block of the X-axis screw rod sliding table, and the other end of the X-axis moving plate is connected to an X-axis sliding block on the X-axis sliding rail; the X-axis driving motor is connected to one end of a screw rod of the X-axis screw rod sliding table and used for driving the screw rod of the X-axis screw rod sliding table to rotate.
By adopting the technical scheme, the sliding connection between the two ends of the X-axis moving plate and the side wall of the shell is realized by using the X-axis slide rail and the X-axis screw rod sliding table, so that the stable sliding between the X-axis moving plate and the shell is realized; meanwhile, under the condition that the X-axis driving motor is used for driving the screw rod in the X-axis screw rod sliding table to rotate, the sliding block on the X-axis screw rod sliding table can be driven to drive the X-axis moving plate to move along the length direction of the X-axis screw rod sliding table; simple structure and high stability.
Preferably, the Y-axis driving mechanism comprises a Y-axis screw rod sliding table and a Y-axis driving motor, and the Y-axis screw rod sliding table is arranged on the X-axis moving plate along the width direction of the machine shell; the Y-axis moving plate is arranged on a sliding block of the Y-axis screw rod sliding table to realize sliding connection between the Y-axis moving plate and the X-axis moving plate; and the Y-axis driving motor is arranged at one end of the X-axis moving plate and is used for driving a screw rod of the Y-axis screw rod sliding table to rotate.
Through adopting above-mentioned technical scheme, Y axle movable plate is located on the slider of Y axle lead screw slip table to this realizes that the sliding between Y axle movable plate and the X axle movable plate is connected, simultaneously, uses the lead screw rotation in the Y axle lead screw slip table of Y axle driving motor drive, can order about the slider of Y axle lead screw slip table and drive the length direction motion of Y axle movable plate along Y axle lead screw slip table.
Preferably, the Z-axis driving mechanism comprises a Z-axis screw rod sliding table and a Z-axis driving motor, and the Z-axis screw rod sliding table is arranged on the Y-axis moving plate along the vertical direction; the Z-axis moving plate is arranged on a sliding block of the Z-axis screw rod sliding table to realize sliding connection between the Z-axis moving plate and the Y-axis moving plate; and the Z-axis driving motor is connected to one end of the screw rod of the Z-axis screw rod sliding table and used for driving the screw rod of the Z-axis screw rod sliding table to rotate.
Through adopting above-mentioned technical scheme, use the combination of Z axle driving motor and Z axle screw slip table, the structure is simple and easy, can conveniently realize the effect of drive Z axle movable block along vertical direction motion.
Preferably, the device further comprises an auxiliary positioning device, wherein the auxiliary positioning device comprises a laser fixing seat and a laser emitter, and the laser fixing seat is connected to the Y-axis moving plate; the laser emitter is arranged on the laser fixing seat.
Through adopting above-mentioned technical scheme, when using computer processing apparatus to utilize first drive arrangement to proofread the time to image receiving arrangement's position, use the visual laser beam of laser generator transmission, can play assistance-localization real-time's effect, be convenient for audio-visual demonstration image receiving arrangement's the proofreading result of horizontal position.
Drawings
Fig. 1 is a schematic view of the overall structure of a detection system in an embodiment of the present application.
Fig. 2 is a schematic diagram for showing an internal structure of a cabinet according to an embodiment of the present application.
Fig. 3 is a schematic diagram of a first driving device and an image receiving device in an embodiment of the present application.
Fig. 4 is a schematic view of another perspective in fig. 3.
Fig. 5 is an exploded schematic view of an X-ray emitting device in an embodiment of the present application.
Fig. 6 is an enlarged schematic view of a portion a of fig. 4.
Description of reference numerals: 1. a housing; 11. a material door; 2. an X-ray emitting device; 21. a light pipe mounting bracket; 22. an X-ray light pipe; 23. a protective cover; 3. an image receiving device; 31. a flat plate mounting plate; 32. a flat panel detector; 4. a display screen; 5. a first driving device; 51. an X-axis drive mechanism; 511. an X-axis screw rod sliding table; 512. an X-axis drive motor; 52. moving the plate along the X axis; 53. a Y-axis drive mechanism; 531. a Y-axis screw rod sliding table; 532. a Y-axis drive motor; 54. moving the plate along the Y axis; 55. a Z-axis drive mechanism; 551. a Z-axis screw rod sliding table; 552. a Z-axis drive motor; 56. moving the plate along the Z axis; 6. a second driving device; 7. an auxiliary positioning device; 71. a laser fixing seat; 72. a laser transmitter; 8. a work table; 9. an X-axis slide rail; 91. an X-axis slide block.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses a 360-degree plane 3D detection method based on X-RAY, and the detection method can improve the identification accuracy of internal defects of products.
A360-degree plane 3D detection method based on X-RAY comprises the following steps:
s1, placing the product between the X-ray emitting device 2 and the image receiving device 3, and aligning the positions of the X-ray emitting device 2 and the image receiving device 3 with the detection area of the product.
S2, emitting X-ray to the detection area of the product through the X-ray emitting device 2, and rotating the X-ray around the projection point of the emission center of the X-ray emitting device 2 by the image receiving device 3 with a fixed radius to receive the scanning image of the product by the X-ray in the same plane at different angles; specifically, the number of received scanned images is an integral multiple of 4.
And S3, conveying the multiple scanning images received in the step S2 to a computer processing device, and synthesizing the multiple scanning images by the computer processing device in a gray scale overlapping, repeated overlapping and repeated de-duplication mode to obtain a 3D image of the detection area.
The implementation principle of the 360-degree plane 3D detection method based on the X-RAY in the embodiment of the application is as follows: aiming at a detection area of a product, the image receiving device 3 is used for rotating around the projection point of the emission center of the X-ray emission device 2 on the same plane, so that the image receiving device 3 can receive a plurality of X-ray scanning images of the product in different angles; a plurality of scanning images are conveyed into a computer processing device, and the computer processing device synthesizes the plurality of scanning images to obtain a 3D image of a product detection point by utilizing a mode of gray level overlapping, repeated overlapping and repeated duplication removal, so that the influence of excessive gray levels on the image is reduced, and the identification accuracy of the internal defects of the product is improved.
The embodiment of the application discloses a 360-degree plane 3D detection system based on X-RAY, and the detection system is used for implementing the detection method.
Referring to fig. 1 and 2, an X-RAY based 360-degree planar 3D inspection system includes a housing 1, an X-RAY emitting device 2, an image receiving device 3, a computer processing device, a first driving device 5, a second driving device 6, and an auxiliary positioning device 7. The top view of the casing 1 is rectangular, a material port is formed in one side wall of the casing 1 in the length direction and used for workers to take and place products; correspondingly, the side wall of the casing 1 is provided with a
Referring to fig. 1 and 2, a table 8 is installed inside the cabinet 1, the first driving device 5 is installed above the table 8, and the second driving device 6 is installed below the table 8; the X-ray emitting device 2 and the image receiving device 3 are arranged at intervals along the vertical direction, wherein the image receiving device 3 is connected with a first driving device 5 above a worktable 8 and is used for being driven by the first driving device 5 to move; the X-ray emitting device 2 is connected to a second driving device 6 below the table 8 for being driven to move by the second driving device 6. The computer processing device comprises a computer and a display screen 4, wherein the computer is arranged in the shell 1 and is connected with the image receiving device 3 and used for processing the scanned image transmitted by the image receiving device 3; the display screen 4 is installed on the outer side wall of the casing 1, and the display screen 4 is connected with a computer.
Referring to fig. 3 and 4, the first driving device 5 includes an
Referring to fig. 3 and 4, the
Referring to fig. 3 and 4, the Y-
Referring to fig. 3 and 4, the Y-axis moving plate 54 is connected to the slider of the Y-axis screw sliding table 531 through a bolt, so as to realize the sliding connection between the Y-axis moving plate 54 and the
Referring to fig. 3 and 4, the Z-axis drive mechanism 55 includes a Z-axis screw sliding table 551 and a Z-axis drive motor 552, wherein the Z-axis screw sliding table 551 is mounted on the Y-axis moving plate 54 in the vertical direction; z axle driving motor 552 is installed in the upside of Z axle screw rod slip table 551, and Z axle driving motor 552 is connected with the lead screw tip of Z axle screw rod slip table 551 through the drive belt to this effect that the slider moved along vertical direction in realizing Z axle driving motor 552 drive Z axle screw rod slip table 551.
Referring to fig. 3 and 4, the Z-
Referring to fig. 2, in the present embodiment, the second driving device 6 is similar to the first driving device 5 in structure and will not be described herein again, and the second driving device 6 is used for enabling the X-ray emitting device 2 to move along the X-axis, Y-axis and Z-axis directions. Referring to fig. 5, the X-ray emitting device 2 includes a light pipe mounting frame 21, an X-ray light pipe 22 and a shielding cover 23, wherein the light pipe mounting frame 21 is connected to the second driving device 6, the X-ray light pipe 22 is mounted on the light pipe mounting frame 21, and an emitting end of the X-ray light pipe 22 faces upward. Meanwhile, a protective cover 23 is installed at the emitting end of the X-ray tube 22 for protecting the emitting end of the X-ray tube 22.
Referring to fig. 4 and 6, the auxiliary positioning device 7 is used for assisting the calibration of the horizontal position of the image receiving device 3, and specifically, the auxiliary positioning device 7 includes a laser fixing seat 71 and a laser emitter 72; wherein, laser fixing base 71 is fixedly mounted on the lower end surface of Z-axis screw rod sliding table 551, and laser emitter 72 is mounted on laser fixing base 71. When the computer processing device utilizes the first driving device 5 to correct the position of the image receiving device 3, the laser beam emitted by the laser generator can play a role in auxiliary positioning, so that the correction result of the horizontal position of the image receiving device 3 can be visually represented.
The implementation principle of a 360-degree planar 3D detection system based on X-RAY in the embodiment of the application is as follows: when a product is placed on the worktable 8, the image receiving device 3 and the X-ray emitting device 2 can be driven to align with the detection area of the product under the driving action of the first driving device 5 and the second driving device 6. Then, the image receiving device 3 can rotate around the vertical projection of the emission center of the X-ray emission device 2 with a fixed radius under the driving action of the first driving device 5, so that the image receiving device 3 can receive the scanning images of a plurality of X-rays to the product in the same horizontal plane at different angles, and the acquisition of a plurality of scanning images in the same detection area is realized.
The image receiving device 3 conveys a plurality of scanning images into the computer processing device, and the computer processing device synthesizes the plurality of scanning images to obtain a 3D image of a product detection point by utilizing the gray level overlapping, repeated overlapping and re-duplication removing modes, so that the influence of excessive gray levels on the image is reduced, and the identification accuracy of the internal defects of the product is improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.