CN221124371U - Online CT-X ray detecting system of SMT circuit board - Google Patents
Online CT-X ray detecting system of SMT circuit board Download PDFInfo
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- CN221124371U CN221124371U CN202323020984.3U CN202323020984U CN221124371U CN 221124371 U CN221124371 U CN 221124371U CN 202323020984 U CN202323020984 U CN 202323020984U CN 221124371 U CN221124371 U CN 221124371U
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- 230000007246 mechanism Effects 0.000 claims abstract description 82
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 230000005855 radiation Effects 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims 3
- 229910000679 solder Inorganic materials 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004458 analytical method Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 abstract description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 abstract description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010223 real-time analysis Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The utility model relates to the technical field of circuit board detection, in particular to an on-line CT-X ray detection system for an SMT circuit board, which comprises a U-shaped fixed base, wherein the top side of the U-shaped fixed base is fixedly connected with a mounting frame, one side of the mounting frame is fixedly provided with two first moving mechanisms, and the two first moving mechanisms are provided with a second moving mechanism. The utility model has the advantages that: through the cooperation setting of first mobile mechanism, second mobile mechanism, objective table, ray source, ray hole, rectangle installing frame, third mobile mechanism, fourth mobile mechanism, movable plate and flat panel detector, can detect double-deck and multilayer circuit board, can carry out more accurate plane 3D analysis to hidden fine pitch solder joint to can also carry out multilayer image "section" to those invisible solder joint such as BGA etc. and detect, can be reliable survey such as the condition such as rosin joint, air sky and formation of image are bad, thereby make the detection effect to SMT circuit board comparatively good.
Description
Technical Field
The utility model relates to the technical field of circuit board detection, in particular to an on-line CT-X ray detection system for an SMT circuit board.
Background
SMT is an abbreviation of SurfaceMountTechnology (surface mount technology), which is a technology for mounting electronic components, in which the electronic components are directly attached to a circuit board through a mounting technology on a PCB, instead of pin fixing through PTH holes, SMT technology is more flexible than conventional PTH hole technology, and can achieve higher component density, smaller circuit board size, more stable electrical performance, and higher production efficiency. In order to ensure the quality of the SMT circuit board, the SMT circuit board needs to be inspected before shipment.
Most of the prior art adopts a visual detection technology to detect the SMT circuit board, most of the detection modes can only detect the surface of the SMT circuit board, when the detection is performed, if the double-layer or multi-layer circuit board and the circuit board are encountered, the condition of invisible welding spots appears, the comprehensive detection operation can not be performed on the double-layer or multi-layer circuit board and the invisible welding spots through the visual detection technology, and the conditions such as cold joint, air void and poor imaging can not be reliably detected, so that the detection effect on the SMT circuit board is affected, and therefore, an online CT-X ray detection system for the SMT circuit board is needed to solve the problems.
Disclosure of utility model
The object of the present utility model is to solve at least one of the technical drawbacks.
Therefore, an objective of the present utility model is to provide an on-line CT-X-ray detection system for SMT circuit boards, which solves the problems mentioned in the background art and overcomes the shortcomings of the prior art.
In order to achieve the above object, an embodiment of an aspect of the present utility model provides an online CT-X-ray detection system for an SMT circuit board, which includes a U-shaped fixing base, wherein a mounting frame is fixedly connected to a top side of the U-shaped fixing base, two first moving mechanisms are fixedly installed on one side of the mounting frame, two second moving mechanisms are provided on the first moving mechanisms, an objective table is provided on the second moving mechanism, a radiation source is fixedly installed on one side of the mounting frame away from the first moving mechanisms, a radiation hole is provided on one side of the mounting frame, a rectangular mounting frame is fixedly connected to a top end of the mounting frame, two third moving mechanisms are fixedly installed on a top side of the rectangular mounting frame, a fourth moving mechanism is provided on the two third moving mechanisms, a moving plate is provided on the fourth moving mechanism, and a flat panel detector is fixedly installed at a bottom end of the moving plate.
In any of the above embodiments, it is preferable that the first moving mechanism, the second moving mechanism, the third moving mechanism and the fourth moving mechanism are all linear modules.
It is preferable in any of the above embodiments that the radiation source corresponds to a position of the radiation hole, and that the flat panel detector corresponds to a position of the radiation source.
In any of the above embodiments, it is preferable that the stage corresponds to a position of a discharge port of the SMT circuit board production line.
By any of the above schemes, it is preferable that the flat panel detector is located inside the rectangular mounting frame, two of the first moving mechanisms are symmetrically distributed on one side of the mounting frame, and two of the third moving mechanisms are symmetrically distributed on one side of the rectangular mounting frame.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
Through the cooperation setting of first mobile mechanism, second mobile mechanism, objective table, ray source, ray hole, rectangle installing frame, third mobile mechanism, fourth mobile mechanism, movable plate and flat panel detector, through orderly removal objective table and flat panel detector's viewpoint can obtain a series of different angle's images, and the computer combines off-axis image information through mathematical operation, and the multiple slice image of PCB solder joint is generated to tomosynthesis technical algorithm to can detect double-deck and multilayer circuit board, can carry out more accurate planar 3D analysis to hidden fine pitch solder joint, and can also carry out multilayer image "slice" to those invisible solder joint such as BGA detects, can reliable detection such as conditions such as rosin joint, air sky and formation of image are bad, thereby make comparatively good to SMT circuit board's detection effect.
Drawings
FIG. 1 is a schematic view of a first view structure according to the present utility model;
FIG. 2 is a schematic view of a second view angle structure according to the present utility model;
FIG. 3 is a schematic view of a third view angle structure according to the present utility model;
FIG. 4 is a schematic structural view of a third moving mechanism and a connecting member thereof according to the present utility model;
fig. 5 is a schematic structural view of the first moving mechanism and the connecting member thereof according to the present utility model.
In the figure: the device comprises a 1-U-shaped fixed base, a 2-mounting frame, a 3-first moving mechanism, a 4-second moving mechanism, a 5-objective table, a 6-ray source, a 7-ray hole, an 8-rectangular mounting frame, a 9-third moving mechanism, a 10-fourth moving mechanism, an 11-moving plate and a 12-flat panel detector.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings, but the scope of the present utility model is not limited to the following.
As shown in fig. 1 to 5, an SMT circuit board online CT-X-ray detection system comprises a U-shaped fixing base 1, a mounting frame 2 fixedly connected to the top side of the U-shaped fixing base 1, the mounting frame 2 having an inverted U-shape, two first moving mechanisms 3 fixedly installed on one side of the mounting frame 2, one second moving mechanism 4 provided on the two first moving mechanisms 3, an object stage 5 provided on the second moving mechanism 4, the object stage 5 being capable of rectilinear motion on the X-axis and the Y-axis through the first moving mechanism 3 and the second moving mechanism 4, a radiation source 6 fixedly installed on the side of the mounting frame 2 away from the first moving mechanism 3, the radiation source 6 capable of emitting CT-X-rays, a radiation hole 7 provided on one side of the mounting frame 2 capable of avoiding blocking rays generated by the radiation source 6 by the mounting frame 2 through the radiation hole 7, the radiation can smoothly pass through the mounting frame 2, the top end of the mounting frame 2 is fixedly connected with a rectangular mounting frame 8, the top side of the rectangular mounting frame 8 is fixedly provided with two third moving mechanisms 9, the two third moving mechanisms 9 are provided with a fourth moving mechanism 10, the fourth moving mechanism 10 is provided with a moving plate 11, the bottom end of the moving plate 11 is fixedly provided with a flat panel detector 12, the flat panel detector 12 is electrically connected with an external computer, the flat panel detector 12 can move on an X axis and a Y axis through the third moving mechanism 9 and the fourth moving mechanism 10, when the SMT circuit board is detected, the SMT circuit board after being processed can move onto the stage 5, the stage 5 can drive the SMT circuit board to move through the first moving mechanism 3 and the second moving mechanism 4, the flat panel detector 12 can move through the third moving mechanism 9 and the fourth moving mechanism 10, a series of images of different angles of the SMT circuit board are obtained through the mutual matching of the movement of the objective table 5 and the movement of the flat panel detector 12, the computer combines the off-axis image information through mathematical operation, a tomosynthesis technology algorithm generates a multi-slice image of a PCB welding spot, the BGA solder ball and the connector through hole are horizontally cut into 100 layers (any set layer number) from top to bottom for tomographic examination, and real-time analysis detection is realized through defect algorithm analysis software, so that the detection system can detect defects including false soldering, bridging, tombstoning, insufficient solder, air holes, device neglected loading, flatness and the like.
As an alternative solution of the present utility model, the first moving mechanism 3, the second moving mechanism 4, the third moving mechanism 9 and the fourth moving mechanism 10 are all linear modules.
As an alternative to the present utility model, the position of the radiation source 6 corresponds to the position of the radiation aperture 7, and the position of the flat panel detector 12 corresponds to the position of the radiation source 6, so that the flat panel detector 12 can better receive the CT-X-ray signal of the radiation source 6.
As an alternative technical scheme of the utility model, the objective table 5 corresponds to the position of the discharge port of the SMT circuit board production line, so that the SMT circuit board after production can be directly moved onto the objective table 5, thereby being convenient for detecting the SMT circuit board.
As an alternative solution of the present utility model, the flat panel detector 12 is located inside the rectangular mounting frame 8, and the two first moving mechanisms 3 are symmetrically distributed on one side of the mounting frame 2, and the two third moving mechanisms 9 are symmetrically distributed on one side of the rectangular mounting frame 8.
An SMT circuit board online CT-X ray detection system has the following working principle:
1) So that the stage 5 corresponds to the exit position of the SMT circuit board production line;
2) The SMT circuit board after production is moved to the object stage 5 and is moved to a detection station through the first moving mechanism 3 and the second moving mechanism 4;
3) The flat panel detector 12 is moved to a detection station through the third moving mechanism 9 and the fourth moving mechanism 10, CT-X rays are emitted through the ray source 6, and at the moment, an appearance image of the SMT circuit board is obtained through the flat panel detector 12;
4) Performing mark point correction on the SMT circuit board, and calculating offset points of the SMT circuit board;
5) The first moving mechanism 3 and the second moving mechanism 4 can enable the object stage 5 to drive the SMT circuit board to move, and the third moving mechanism 9 and the fourth moving mechanism 10 enable the flat panel detector 12 to move, so that the flat panel detector 12 can freely select scanning center points and perform detection operation with more angles, and projection images with different angles are obtained at the moment;
6) And generating all projection image synthesis technical algorithms, generating a 3D image, slicing the product and analyzing the sliced image, so as to detect the SMT circuit board.
In summary, in the on-line CT-X-ray detection system for SMT circuit boards, through the cooperation of the first moving mechanism 3, the second moving mechanism 4, the objective table 5, the radiation source 6, the radiation hole 7, the rectangular mounting frame 8, the third moving mechanism 9, the fourth moving mechanism 10, the moving plate 11 and the flat panel detector 12, a series of images with different angles can be obtained through the observation points of the orderly moving objective table 5 and the flat panel detector 12, the computer combines the off-axis image information through mathematical operation, and the tomosynthesis technology algorithm generates multiple slice images of the PCB solder joints, so that the circuit boards with double layers and multiple layers can be detected, the hidden fine-pitch solder joints can be subjected to more accurate planar 3D analysis, and the invisible solder joints such as BGA (ball grid array) can be subjected to multi-layer image "slice" detection, and the situations such as virtual soldering, air voids and poor imaging can be reliably detected, so that the detection effect on the SMT circuit boards is relatively good.
Claims (5)
1. An on-line CT-X ray detection system of an SMT circuit board is characterized in that: including U-shaped unable adjustment base (1), the top fixedly connected with mounting bracket (2) of U-shaped unable adjustment base (1), one side fixed mounting of mounting bracket (2) has two first moving mechanism (3), two be provided with a second moving mechanism (4) on first moving mechanism (3), be provided with objective table (5) on second moving mechanism (4), one side fixed mounting that first moving mechanism (3) was kept away from to mounting bracket (2) has ray source (6), ray hole (7) have been seted up to one side of mounting bracket (2), the top fixedly connected with rectangle installing frame (8) of mounting bracket (2), the top fixedly connected with of rectangle installing frame (8) has two third moving mechanism (9), two be provided with a fourth moving mechanism (10) on third moving mechanism (9), be provided with movable plate (11) on fourth moving mechanism (10), the bottom fixed mounting of movable plate (11) has flat panel detector (12).
2. An SMT circuit board online CT-X-ray detection system according to claim 1, wherein: the first moving mechanism (3), the second moving mechanism (4), the third moving mechanism (9) and the fourth moving mechanism (10) are all linear modules.
3. An SMT circuit board online CT-X-ray detection system according to claim 2, wherein: the radiation source (6) corresponds to the position of the radiation hole (7), and the flat panel detector (12) corresponds to the position of the radiation source (6).
4. An SMT circuit board online CT-X-ray detection system according to claim 3, wherein: the objective table (5) corresponds to the discharge port of the SMT circuit board production line.
5. An SMT circuit board online CT-X-ray detection system according to claim 4, wherein: the flat panel detector (12) is located in the rectangular installation frame (8), two first moving mechanisms (3) are symmetrically distributed on one side of the installation frame (2), and two third moving mechanisms (9) are symmetrically distributed on one side of the rectangular installation frame (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323020984.3U CN221124371U (en) | 2023-11-09 | 2023-11-09 | Online CT-X ray detecting system of SMT circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323020984.3U CN221124371U (en) | 2023-11-09 | 2023-11-09 | Online CT-X ray detecting system of SMT circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221124371U true CN221124371U (en) | 2024-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323020984.3U Active CN221124371U (en) | 2023-11-09 | 2023-11-09 | Online CT-X ray detecting system of SMT circuit board |
Country Status (1)
| Country | Link |
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| CN (1) | CN221124371U (en) |
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2023
- 2023-11-09 CN CN202323020984.3U patent/CN221124371U/en active Active
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