CN218824003U - Optical system for detecting printed circuit - Google Patents
Optical system for detecting printed circuit Download PDFInfo
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- CN218824003U CN218824003U CN202222812083.7U CN202222812083U CN218824003U CN 218824003 U CN218824003 U CN 218824003U CN 202222812083 U CN202222812083 U CN 202222812083U CN 218824003 U CN218824003 U CN 218824003U
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Abstract
The utility model discloses a detect optical system of printed circuit relates to automatic optical detection technical field, and this optical system includes: fixing the substrate; the line scanning camera is arranged on the fixed substrate, and an optical lens is arranged at the bottom of the line scanning camera; the light source box is arranged on the fixed substrate and corresponds to the line scanning camera up and down; wherein, the internally mounted of light source box has a plurality of bar lamps, and the inclination diverse of bar lamp. A detect optical system of printed circuit, the multi-light-path light source of adoption can follow 7 angles and send out the light and carry out all-round illumination to the product, makes the characteristic of product truer effective, reduces the wrong interference that environment light and product fold fluctuation arouse by a wide margin, and the product image of gathering judges for software, the erroneous judgement that can significantly reduce to reduce the time that personnel reedged.
Description
Technical Field
The utility model relates to an automatic optical detection technical field, in particular to detect optical system of printed circuit.
Background
With the continuous improvement of the demands of industries such as consumer electronics and intelligent automobiles on the flexible circuit boards, higher requirements are put forward on the capacity and quality control of flexible circuit board manufacturers.
The traditional method for detecting the flexible circuit board is used for manually detecting the defects of the product, has the defects of low random inspection rate, low accuracy, poor real-time performance, low efficiency, large influence of manual experience and subjective factors, incapability of realizing production data tracing and the like, and is difficult to meet the increasing production capacity requirement and product quality.
Aiming at the serious defects of the traditional manual detection method, the automatic optical detection technology is produced. The rapidity and objectivity of automatic optical detection ensure that the production process of the flexible circuit board is rapidly improved, which benefits from a set of stable optical imaging system. The optical imaging system consists of a CMOS line scanning camera, an optical lens, a light source, a clamping device of the light source and the like, and the optical imaging system has the function of finishing the acquisition of the surface image of the product. Under the illumination of a light source, the surface of the product is imaged on a camera sensor through an optical lens, an optical signal is converted into an electric signal and then converted into a digital signal which can be processed by an image algorithm, and then the quality of the product is judged and processed.
The imaging speed of the existing automatic optical detection system for the printed circuit board is generally maintained at 4m/min, and the existing imaging speed can not meet the requirement aiming at the increasing demand of capacity. And as the line width and the line distance of the printed circuit are smaller and smaller, the precision of the optical system also needs to be greatly improved. The existing automatic optical detection system has a large amount of misjudgments in the identification and judgment process of the flexible circuit board, which forces the manual work to spend a large amount of time to carry out re-judgment on report points and influences the output, and therefore, the optical system for detecting the printed circuit is provided.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
To the deficiency of the prior art, the utility model provides an optical system for detecting printed circuit, the imaging speed of solving current automatic optical detection system for printed circuit board generally maintains at 4m/min, to the demand that the productivity is growing day by day, current imaging speed has not reached the requirement. And as the line width and the line distance of the printed circuit are smaller and smaller, the precision of the optical system also needs to be greatly improved. The existing automatic optical detection system has the technical problem that a large amount of misjudgment is caused in the identification and judgment process of the flexible circuit board, so that a large amount of time is required for manual re-judgment of report points, and the output is influenced.
(II) technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
an optical system for inspecting a printed circuit, the optical system comprising:
fixing the substrate;
the line scanning camera is arranged on the fixed substrate, and an optical lens is arranged at the bottom of the line scanning camera; and
the light source box is arranged on the fixed base plate and corresponds to the line scanning camera up and down;
wherein, the internally mounted of light source box has a plurality of bar lamps, and the inclination diverse of bar lamp.
Preferably, the number of the strip lamps is seven, and when the flexible circuit board is positioned at the top of the light source box, the seven strip lamps respectively irradiate the surface of the flexible circuit board with included angles of 30 degrees, 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees and 150 degrees.
Preferably, the front end of the fixed substrate is provided with a camera adjusting assembly, and the camera adjusting assembly is used for driving the line scanning camera to move up and down;
the camera adjusting assembly comprises a motor, a screw rod is mounted on an output shaft of the motor, a sliding block is mounted outside the screw rod, and the sliding block is connected with the line scanning camera.
Preferably, a sliding seat is installed outside the sliding block, and the sliding block is connected with the line scanning camera through the sliding seat.
Preferably, a translation assembly is connected between the line scanning camera and the sliding seat, and the translation assembly is used for driving the line scanning camera to translate and rotate;
the translation assembly comprises a connecting seat, an annular rotary table is connected to the outer portion of the connecting seat, and an extension head on the outer portion of the rotary table is inserted into the connecting seat;
a rotary adjusting knob is mounted on one side of the connecting seat and connected with the side wall of the extension head;
the translation adjust knob is installed to the front end of connecting seat, and translation adjust knob and extension head's end connection.
Preferably, the line scan camera is connected to the top of the turntable, and the optical lens at the bottom of the line scan camera passes through the turntable.
Preferably, the front end of the fixed substrate is provided with a light source adjusting assembly, and the light source adjusting assembly is used for driving the light source box to move up and down;
the light source adjusting assembly comprises a supporting plate, the front end of the supporting plate is connected with a bearing plate in a sliding mode, a hand wheel is installed at the top of the supporting plate, and the hand wheel is in threaded connection with the bearing plate through a screw rod.
(III) advantageous effects
Firstly, adopt the line scanning camera, have high speed high sensitivity's characteristics, can promote the imaging speed of current printed circuit flexible board to 9m/min from 4m/min, detection efficiency obtains promoting by a wide margin.
Secondly, adopt high fraction optical lens, carry out meticulous focusing to the product surface and make the characteristic of product present and carry out photoelectric signal conversion and generate digital image on line scanning camera inside, transmit the digital image of product to industrial control computer by line scanning camera again and supply software to differentiate the product quality, the utility model discloses a high fraction camera lens can carry out the analytic of 10 mu m precision to printed circuit board, promote greatly and detect the ability, leave the problem product at the present detection workstation, avoid causing loss of property because of unqualified product stays the low reaches process.
And thirdly, the adopted multi-light-path illumination light source can emit light from 7 angles to illuminate the product in all directions, so that the characteristics of the product are more real and effective, the error interference caused by the fluctuation of the ambient light and the wrinkles of the product is greatly reduced, the collected product image is judged by software, the misjudgment can be greatly reduced, and the time for the re-judgment of personnel is reduced.
Drawings
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
FIG. 1 is an overall structure diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of the present invention;
FIG. 3 is a diagram of a translation assembly according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a translation assembly in an embodiment of the present invention;
fig. 5 is a structural diagram of a light source adjusting assembly according to an embodiment of the present invention;
FIG. 6 is a block diagram of an embodiment of a camera adjustment assembly;
FIG. 7 is a diagram of a light source box according to an embodiment of the present invention;
FIG. 8 is a bottom view of the light box of the embodiment of the present invention;
fig. 9 is a cross-sectional view of the light source box in the embodiment of the present invention.
Illustration of the drawings: 1. fixing the substrate; 2. a sliding seat; 3. a camera adjustment assembly; 31. a motor; 32. a screw rod; 33. a slider; 4. a translation assembly; 41. a turntable; 42. an extension head; 43. rotating the adjusting knob; 44. a translation adjusting knob; 45. a connecting seat; 5. a light source adjustment assembly; 51. a support plate; 52. a carrier plate; 53. a hand wheel; 6. a line scan camera; 7. an optical lens; 8. a light source box; 9. a bar-shaped light.
Detailed Description
By providing the optical system for detecting the printed circuit, when the printed circuit is detected, the line scanning camera is adopted, so that the optical system has the characteristics of high speed and high sensitivity, the imaging speed of the existing printed circuit flexible board can be increased to 9m/min from 4m/min, and the detection efficiency is greatly improved; adopt high fraction optical lens, carry out the meticulous focus to the product surface and make the characteristic of product present and sweep line inside the line scanning camera and carry out photoelectric signal conversion and generate the digital image, again by line scanning camera with the digital image transmission of product to industrial control computer for software to differentiate the product quality, the utility model discloses a high fraction lens can carry out the analysis of 10 mu m precision to the printed circuit board, promote greatly and detect the ability, leave the product that has the problem at present and detect the workstation, avoid keeping the low reaches process because of unqualified product and cause property loss; the adopted multi-light-path illumination light source can emit light from 7 angles to carry out omnibearing illumination on the product, so that the characteristics of the product are more real and effective, the error interference caused by the fluctuation of ambient light and the wrinkles of the product is greatly reduced, the collected product image is judged by software, the misjudgment can be greatly reduced, and the time for the re-judgment of personnel is reduced.
Examples
The technical scheme in the embodiment of the application aims to solve the problem that the imaging speed of the existing automatic optical detection system for the printed circuit board is generally maintained at 4m/min, and the existing imaging speed cannot meet the requirement aiming at the increasing demand of productivity. And as the line width and the line distance of the printed circuit are smaller and smaller, the precision of the optical system also needs to be greatly improved. The existing automatic optical detection system has a large amount of misjudgment conditions in the identification and judgment process of the flexible circuit board, which forces the manual labor to spend a large amount of time to carry out re-judgment on report points, and influences the technical problem of output, and the general idea is as follows:
to the problem that exists among the prior art, the utility model provides a detect printed circuit's optical system, this optical system includes:
the fixed baseplate 1 is used for connecting the line scanning camera 6 and the light source box 8 into a whole to form a whole set of optical module special for the imaging printed circuit. The automatic detection device is assembled and integrated on automatic detection equipment or a production line through 6 screw holes on the left side and the right side of the fixed base plate 1;
a line scanning camera 6 mounted on the fixed substrate 1, and an optical lens 7 mounted at the bottom of the line scanning camera 6; the optical lens 7 is connected with the thread interface of the line scanning camera 6 through the thread interface, and the optical lens 7 is used for converging light rays to a CMOS photosensitive chip in the line scanning camera 6 to enable the camera to image clearly;
the light source box 8 is arranged on the fixed substrate 1 and corresponds to the line scanning camera 6 up and down, the light source box 8 is a combined light source in 7 light path directions, the light source box 8 emits linear light sources to irradiate the surface of a product from 7 directions of 30 degrees, 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees and 150 degrees respectively, and the linear light sources are reflected to a CMOS photosensitive chip of the camera 6 through a semi-transparent semi-reflecting mirror at the top of the light source to form an image of the product to be detected;
wherein, the internally mounted of light source box 8 has a plurality of bar lamps 9, and the inclination diverse of bar lamp 9.
In some examples, the number of the strip lamps 9 is seven, and when the flexible wiring board is positioned on top of the light source box 8, the seven strip lamps 9 are irradiated to the surface of the flexible wiring board at included angles of 30 °, 45 °, 60 °,90 °,120 °,135 ° and 150 °, respectively, as in fig. 7, 8 and 9.
In some examples, the front end of the fixed substrate 1 is mounted with a camera adjusting assembly 3, and the camera adjusting assembly 3 is used for driving the line scanning camera 6 to move up and down;
the camera adjusting assembly 3 includes a motor 31, a lead screw 32 is mounted on an output shaft of the motor 31, a slider 33 is mounted outside the lead screw 32, and the slider 33 is connected with the line scanning camera 6.
The camera adjusting component 3 is driven by the linear motor 31, manual adjustment is not needed, and the distance between the line scanning camera 6 and the optical lens 7 relative to the surface of the product to be detected is ensured to be within a clear focusing range.
In some examples, the slide block 33 is externally mounted with the slide base 2, and the slide block 33 is connected with the line scanning camera 6 through the slide base 2 so that the line scanning camera 6 can move up and down along with the slide base 2.
In some examples, a translation assembly 4 is connected between the line scan camera 6 and the sliding seat 2, and the translation assembly 4 is used for driving the line scan camera 6 to translate and rotate;
the translation assembly 4 comprises a connecting seat 45, an annular turntable 41 is connected to the exterior of the connecting seat 45, and an extension head 42 on the exterior of the turntable 41 is inserted into the interior of the connecting seat 45;
a rotary adjusting knob 43 is arranged on one side of the connecting seat 45, and the rotary adjusting knob 43 is connected with the side wall of the extension head 42;
the front end of the connecting seat 45 is provided with a translation adjusting knob 44, and the translation adjusting knob 44 is connected with the end part of the extension head 42.
The translation assembly 4 can adjust the left and right directions and angles of the camera, so that the camera is positioned in the center of the visual field of the product to be detected.
In some examples, the line scan camera 6 is attached to the top of the turntable 41, and the optical lens 7 at the bottom of the line scan camera 6 passes through the turntable 41.
In some examples, the front end of the fixed substrate 1 is provided with a light source adjusting assembly 5, and the light source adjusting assembly 5 is used for driving the light source box 8 to move up and down;
wherein, light source adjusting part 5 contains backup pad 51, and backup pad 51's front end sliding connection has loading board 52, hand wheel 53 is installed at backup pad 51's top, and hand wheel 53 passes through screw rod and loading board 52 threaded connection, light source box 8 is installed on loading board 52, light source adjusting part 5 can easily realize through the knob, the removal of light source box 8 up-and-down direction, the messenger waits to detect product and light source box 8 distance and keeps in reasonable within range, thereby the messenger waits to detect the light quantity that the product received more.
In the specific implementation process, the device is additionally arranged on an automatic detection line body, when the printed circuit to be detected moves through the position 30mm away from the lowest part of an optical module of the imaging printed circuit, a digital image of a product to be detected can be formed, and the digital image of the product to be detected can be transmitted to an industrial control computer through a data line connected with the line scanning camera 6 and an industrial personal computer for software to judge whether the product to be detected is qualified. The optical module can be used for clearly imaging the defects of short circuit, open circuit, needle hole, defect and foreign matter of the circuit.
During adjustment, the screw rod 32 is driven to rotate by the motor 31, and the screw rod 32 and the sliding block 33 move up and down, and the line scanning camera 6 is connected with the sliding block 33, so that the line scanning camera 6 can be driven to move up and down along the screw rod 32 when the motor 31 rotates;
when the line scanning camera 6 is required to rotate, the rotation adjusting knob 43 on the outer side of the connecting seat 45 is rotated, so that the rotation adjusting knob 43 drives the turntable 41 (the line scanning camera 6 is mounted on the outer portion of the turntable 41) to rotate, and when the line scanning camera 6 is required to translate, the translation adjusting knob 44 is rotated, so that the translation adjusting knob 44 pushes the turntable 41 (the line scanning camera 6 is mounted on the outer portion of the turntable 41).
When light source box 8 is required to move up and down, hand wheel 53 outside support plate 51 is rotated, so that hand wheel 53 drives the screw rod to rotate, and the screw rod is in threaded connection with light source box 8, thereby moving light source box 8 up and down along the screw rod.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.
Claims (7)
1. An optical system for inspecting a printed circuit, the optical system comprising:
a fixed substrate (1);
the line scanning camera (6) is arranged on the fixed substrate (1), and an optical lens (7) is arranged at the bottom of the line scanning camera (6); and
the light source box (8) is arranged on the fixed substrate (1) and vertically corresponds to the line scanning camera (6), and the light source box (8) provides a light source for the flexible circuit board;
wherein, the internally mounted of light source box (8) has a plurality of bar lamps (9), and the contained angle of a plurality of bar lamps (9) and flexible line way board is all inequality.
2. An optical system for inspecting printed circuits as defined in claim 1, wherein: the number of the strip-shaped lamps (9) is seven, and when the flexible circuit board is positioned at the top of the light source box (8), the strip-shaped lamps (9) irradiate the surface of the flexible circuit board at included angles of 30 degrees, 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees and 150 degrees respectively.
3. An optical system for inspecting printed circuits according to claim 1, wherein: the front end of the fixed base plate (1) is provided with a camera adjusting component (3), and the camera adjusting component (3) is used for driving the line scanning camera (6) to move up and down;
the camera adjusting assembly (3) comprises a motor (31), a screw rod (32) is installed on an output shaft of the motor (31), a sliding block (33) is installed outside the screw rod (32), and the sliding block (33) is connected with the line scanning video camera (6).
4. An optical system for inspecting printed circuits according to claim 3, wherein: the outside mounting of slider (33) has sliding seat (2), and slider (33) are connected with line scanning camera (6) through sliding seat (2).
5. An optical system for inspecting printed circuits as defined in claim 1, wherein: a translation assembly (4) is connected between the line scanning camera (6) and the sliding seat (2), and the translation assembly (4) is used for driving the line scanning camera (6) to translate and rotate;
the translation assembly (4) comprises a connecting seat (45), an annular turntable (41) is connected to the outer portion of the connecting seat (45), and an extension head (42) on the outer portion of the turntable (41) is inserted into the connecting seat (45);
a rotary adjusting knob (43) is installed on one side of the connecting seat (45), and the rotary adjusting knob (43) is connected with the side wall of the extension head (42);
translation adjust knob (44) are installed to the front end of connecting seat (45), and translation adjust knob (44) and the end connection who extends head (42).
6. An optical system for inspecting printed circuits as defined in claim 5, wherein: the line scanning camera (6) is connected to the top of the rotary table (41), and an optical lens (7) at the bottom of the line scanning camera (6) penetrates through the rotary table (41).
7. An optical system for inspecting printed circuits according to claim 1, wherein: the front end of the fixed base plate (1) is provided with a light source adjusting component (5), and the light source adjusting component (5) is used for driving the light source box (8) to move up and down;
the light source adjusting assembly (5) comprises a supporting plate (51), the front end of the supporting plate (51) is connected with a bearing plate (52) in a sliding mode, a hand wheel (53) is installed at the top of the supporting plate (51), and the hand wheel (53) is in threaded connection with the bearing plate (52) through a screw rod;
the light source box (8) is mounted on a carrier plate (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222812083.7U CN218824003U (en) | 2022-10-25 | 2022-10-25 | Optical system for detecting printed circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222812083.7U CN218824003U (en) | 2022-10-25 | 2022-10-25 | Optical system for detecting printed circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218824003U true CN218824003U (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222812083.7U Active CN218824003U (en) | 2022-10-25 | 2022-10-25 | Optical system for detecting printed circuit |
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| Country | Link |
|---|---|
| CN (1) | CN218824003U (en) |
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- 2022-10-25 CN CN202222812083.7U patent/CN218824003U/en active Active
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