CN200980120Y - T-type dual-lens image-acquisition devices for full-automatic solder paste printing process machine - Google Patents
T-type dual-lens image-acquisition devices for full-automatic solder paste printing process machine Download PDFInfo
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- CN200980120Y CN200980120Y CNU2006201540281U CN200620154028U CN200980120Y CN 200980120 Y CN200980120 Y CN 200980120Y CN U2006201540281 U CNU2006201540281 U CN U2006201540281U CN 200620154028 U CN200620154028 U CN 200620154028U CN 200980120 Y CN200980120 Y CN 200980120Y
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Abstract
The utility model discloses a T-type dual-lens image pick device used in full-automatic visual tin paste printer, comprising upper and lower independent optical path to pick the images of a steel network and a circuit board respectively, while each optical path comprises a beam splitter, a light source, a mirror, an image lens and an image sensor, wherein the mirror and the light source are at two sides of the beam splitter, the image sensor is at the back of the image lens, the image lens at another side of the beam splitter, the optical axis of the image lens and the light source are vertical, the split face of the beam splitter is 45 degrees with the optical axis of the image lens and the light source. The utility model has independent two optical paths, with easy adjustment and the ability for collecting the images of steel network and circuit board synchronously at high speed.
Description
Technical field
The utility model relates to a kind of image collecting device, particularly relates to a kind of image collecting device that is used for reference measurement and paste solder printing inspection; Specifically be meant the image collecting device that steel mesh and circuit board are checked in the reference measurement of the circuit board paste solder printing process steel mesh that is used for the steel mesh typography and circuit board and the paste solder printing process.
Background technology
In the circuit board paste solder printing process that adopts the steel mesh typography, tin cream accurately is printed onto on the circuit board, the position that will print on the circuit board accurately need be aimed at the perforate on the steel mesh.The method that the aligning of steel mesh and circuit board generally adopts benchmark to aim at is being done mark in other words on steel mesh and the circuit board, when the markers align that guarantees in the processing when both correspondences, the position that will print on circuit board and the steel mesh is promptly aimed at the perforate on the steel mesh.The simplest benchmark alignment methods is a mechanical positioning, the benchmark of this method is the location hole of special processing on the circuit board, use one or several cylinder piston mechanism on the printing machine, during the location lance of piston is inserted in the location hole of PCB to reach the purpose of location.Its shortcoming is that positioning accuracy is poor, and speed is slow, because aperture, the location difference of different PCB, that have even do not have a location hole, therefore this method adaptation is poor, is difficult to adapt to high density, high production and the high-precision development trend that SMT produces, and this technology progressively is eliminated at present.
Along with electronic devices and components develop to directions such as chip type, microminiaturization, high density, more and more higher to the requirement of printing precision, speed and the reliability of stencil printer.Current in the SMT of high density circuit board production line, most defective is bad from the printing of tin cream.The main employing manual method of paste solder printing quality examination, but artificial vision's inspection exists subjectivity strong, and repeatable poor, visual fatigue is easily brought problems such as erroneous judgement and omission.The artificial vision checks the supporting detection requirement that has been difficult to satisfy the SMT production line.
Adopt the stencil printer of machine vision technique can realize printing quality inspection in benchmark high-speed, high precision aligning, the printing process simultaneously.The image collecting device of the stencil printer of the type generally comprises low angle annular light source, two light sources, a spectroscope, a reflective mirror, an imaging len, an imageing sensor at present.During work, any one of two light sources that is arranged in different level is luminous, light source is through spectroscope irradiation irradiation steel mesh or circuit board, reflected back spectroscope then, again through the reflective mirror refraction of optical beam to imaging len, imaging on imageing sensor at last, the image of Huo Deing is the stack of circuit board and steel mesh image like this, by analysis image, can draw locating information.Also can control the switch of light source by timesharing, thereby timesharing photographs the image of steel mesh and PCB.The advantage of this method is that light path is simple and cost is low, but light path adjustment difficulty relatively, and the while is the image analysis algorithm complexity during images acquired, and the acquisition time image is then more consuming time, also has a small amount of ghost image; And device size on optical path direction up and down is bigger, like this benchmark aim at and during print inspection between circuit board and the steel mesh apart from corresponding also bigger.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, a kind of compact conformation is provided, light path is separate, adjustment is easy, can gather the image of steel mesh and circuit board simultaneously, the image collecting device of steel mesh that picking rate is fast and circuit board reference measurement and paste solder printing process check.
The purpose of this utility model is achieved through the following technical solutions:
A kind of T type double lens image acquisition apparatus that is used for full-automatic stencil printing machine has two independent light path up and down, gathers steel mesh and circuit board image respectively, and each light path comprises spectroscope, light source, reflective mirror, imaging len and imageing sensor; Speculum and light source are positioned at the spectroscope both sides, and imaging len is positioned at spectroscopical opposite side, and after imageing sensor was positioned at imaging len, the optical axis of imaging len and light source was vertical mutually, and the optical axis included angle of spectroscopical light splitting surface and imaging len and light source is 45 °.Described speculum is two isosceles right-angle prisms that are stacked together, and two speculums are placed one on the other, will reflect to spectroscope from the light of steel mesh and circuit board respectively.Described speculum also can be two reflecting optics, can also be a right-angle prism that two reflectings surface are arranged.Described speculum, spectroscope and light source are positioned on the axis, and imageing sensor, imaging len and spectroscope also are positioned on the same axis, and two axis constitute T type structure together.
Described spectroscope is two right-angle prisms that are stacked together, and also can be the spectroscope of a cuboid, can also be made up of one or two light splitting piece;
Described annular light source is the LED annular light source.
Described imageing sensor is the CCD camera or the CMOS camera of analog or digital.
The utility model compared with prior art has following advantage and beneficial effect:
The image collecting device that the utility model relates to has two independent light paths up and down, gather respectively steel mesh down with the image of circuit board towards upside.The light path adjustment is easy, can gather steel mesh and circuit board image simultaneously, and IMAQ speed is fast, and compact conformation is easy to realize.
Description of drawings
Fig. 1 is a kind of stereogram that is used for the T type double lens image acquisition apparatus of full-automatic stencil printing machine of the utility model
Fig. 2 is a kind of vertical view that is used for the T type double lens image acquisition apparatus of full-automatic stencil printing machine of the utility model;
Fig. 3 is a kind of front view that is used for the T type double lens image acquisition apparatus course of work of full-automatic stencil printing machine of the utility model;
Fig. 4 is a kind of T type double lens image acquisition apparatus upward view that is used for full-automatic stencil printing machine of the utility model;
Fig. 5 is a kind of T type double lens image acquisition apparatus right view that is used for full-automatic stencil printing machine of the utility model;
Fig. 6 is a kind of T type double lens image acquisition apparatus and IMAQ control and processing unit and positioner formation structural representation that is used for full-automatic stencil printing machine among the embodiment.
Shown in the figure: 1 and 2-speculum; 3-low angle LED annular light source; 4 and 5-spectroscope; 6 and 7-led light source; 8 and 10-imaging len; 9 and 11-imageing sensor; The described image collecting device of 12-this patent; 13-steel mesh; 14-circuit board; 15-positioner; Control of 16-IMAQ and processing unit.
Embodiment
In order to understand the utility model better, the utility model is done to describe further below in conjunction with drawings and Examples.
Shown in Fig. 1,2,3,4 and 5, a kind of image collecting device that is used for reference measurement and paste solder printing inspection comprises reflective mirror 1 and 2, low angle annular light source 3, spectroscope 4 and 5, light source 6 and 7, imaging len 8 and 10, imageing sensor 9 and 11.Device two light paths up and down is independent, gather steel mesh and circuit board image respectively, speculum 1,2 and light source 6,7 are positioned at the both sides of spectroscope 4,5, imaging len 8 (or 10) is vertical mutually with the optical axis of light source 6 (or 7), and spectroscope 4 and 5 light splitting surface and the optical axis included angle of imaging len 8 and light source 6,7 are 45 °; The emergent light of light source 6,7 to speculum 1,2, is distinguished directive steel mesh 13 and circuit board 14 through spectroscope 4,5 refractions again after mirror reflects, annular light source 3 is positioned at speculum 2 belows, for circuit board 14 provides side lighting; Speculum 2 downward beam reflected are passed annular light source 3 centre bores and are shone circuit board 14.To spectroscope 4, the folded light beam of circuit board 14 shines bottom reflective mirror 2 after then passing the centre bore of annular light source 3 earlier to the folded light beam of steel mesh 13, through its reflected back spectroscope 5 through 90 ° of speculum 1 reflections; Speculum 1 and 2 is two isosceles right-angle prisms that are stacked together, and speculum also can be two reflecting optics, can also be a right-angle prism that two reflectings surface are arranged.Spectroscope 4 and 5 is two right-angle prisms that are stacked together, and also can be the spectroscope of a cuboid, can also be one or two light splitting piece; Partial reflection light reflects to light source 6,7 through spectroscope 4,5, another part light then enters imaging len 8 and 10 for 90 ° through spectroscope 4,5 reflections, respectively in imageing sensor 9 and 11 imagings, imageing sensor 9 and 10 is the CCD camera or the CMOS camera of analog or digital, imageing sensor is analog voltage signal or digital signal with image transitions, sends Computer Processing to.
As shown in Figure 6, in order to cooperate image collecting device work of the present utility model, also need IMAQ control and processing unit 16 and positioner 15.IMAQ control and processing unit 16 are made up of with all-purpose computer and memory shooting controller, image pick-up card, register control and image processing module.The controller of wherein making a video recording is connected with 11 with the led light source 6,7 and the imageing sensor 9 of image collecting device of the present utility model respectively, controls the illumination of led light source 6,7 respectively, and the IMAQ of control chart image-position sensor 9 and 11.Image pick-up card and imageing sensor 9 are connected with 11 video interface, convert image video signal to digital signal.The positioner controller is connected with positioner 15, image collecting device 12 is installed on the positioner 15, during images acquired, according to specified coordinate information, positioner 15 is sent image collecting device 12 into assigned address between steel mesh 13 and the circuit board 14, image collecting device 12 is gathered steel mesh simultaneously towards board side and the circuit board image towards the steel mesh side, and image acquisition process is finished by procedure auto-control, and the image and the result of collection are kept in the memory.
When using image collecting device of the present utility model, the light that led light source 6 and 7 sends reflects to reflective mirror 1 and 2 through spectroscope 4 and 5, speculum 1 upwards reflexes to steel mesh 13 with light, speculum 2 reflects light downwards, the centre bore that light beam passes annular light source 3 shines on the circuit board 11, and annular light source provides side lighting for the circuit board collection.The light that reflects from steel mesh 10 reflects to spectroscope 4 through speculum 1; The centre bore that the light beam that reflects from circuit board 14 passes annular light source 3 shines speculum 2, reflects to spectroscope 5 again.To light source 6 and 7,50% enters imaging len 8 and 10 for 90 ° through spectroscope 4 and 5 reflections to the reverberation about 50% of returning from speculum 1 and 2 in addition through spectroscope 4 and 5 refractions, and last two-way light up and down is respectively in imageing sensor 9 and 11 imagings.
When being used for reference measurement, by image collecting device of the present utility model, can collect the image that is positioned at the datum mark on circuit board 14 and the steel mesh 13 simultaneously, convert digital signal input computer to through image pick-up card, can calculate the coordinate of two datum marks, and carry out further variance analysis, and then can realize benchmark high-speed, high precision aligning.
When being used for the paste solder printing inspection, by image collecting device of the present utility model, the image of collecting circuit board 14 and steel mesh 13 simultaneously, convert the picture signal of gathering to digital signal through image pick-up card, the input computer, and with computer in the standard form information of preserving compare, thereby but the mesh chocking-up degree of the paste solder printing quality of check circuit plate and steel mesh.
Image collecting device of the present utility model has two independent light paths up and down, gathers the image of steel mesh downside and circuit board upside simultaneously.Light path is easy to adjust, easily gets a distinct image, and has higher IMAQ speed, and whole device is installed on the body, compact conformation.
The above only is the preferable possible embodiments of the utility model, is not so limits protection range of the present utility model, so the equivalent structure that all application the utility model specifications or accompanying drawing content are carried out changes, all is contained in the utility model protection range.
Claims (10)
1, a kind of T type double lens image acquisition apparatus that is used for full-automatic stencil printing machine, it is characterized in that having two independent light path up and down, gather steel mesh and circuit board image respectively, each light path comprises spectroscope, light source, reflective mirror, imaging len and imageing sensor; Speculum and light source are positioned at the spectroscope both sides, and imaging len is positioned at spectroscopical opposite side, and after imageing sensor was positioned at imaging len, the optical axis of imaging len and light source was vertical mutually, and the optical axis included angle of spectroscopical light splitting surface and imaging len and light source is 45 °.
2, according to the described a kind of T type double lens image acquisition apparatus that is used for full-automatic stencil printing machine of claim 1, it is characterized in that described speculum is an isosceles right-angle prism.
3, according to the described a kind of T type double lens image acquisition apparatus that is used for full-automatic stencil printing machine of claim 1, it is characterized in that speculum also can be two reflecting optics, or the right-angle prism that two reflectings surface are arranged.
4, according to the described a kind of T type double lens image acquisition apparatus that is used for full-automatic stencil printing machine of claim 1, it is characterized in that described spectroscope is two right-angle prisms.
5, according to the described a kind of T type double lens image acquisition apparatus that is used for full-automatic stencil printing machine of claim 1, it is characterized in that described spectroscope is the spectroscope of a cuboid.
6,, it is characterized in that described spectroscope is made up of one or two light splitting piece according to the described a kind of T type double lens image acquisition apparatus that is used for full-automatic stencil printing machine of claim 1.
7,, it is characterized in that described imageing sensor is the CCD camera or the CMOS camera of analog or digital according to the described a kind of T type double lens image acquisition apparatus that is used for full-automatic stencil printing machine of claim 1.
8, according to any described a kind of T type double lens image acquisition apparatus that is used for full-automatic stencil printing machine of claim 1～7, it is characterized in that also comprising annular light source, described annular light source is the LED annular light source, be positioned between circuit board and the speculum, for circuit board provides side lighting, the downward beam reflected of speculum is passed the annular light source centre bore and is shone circuit board.
9, according to any described a kind of T type double lens image acquisition apparatus that is used for full-automatic stencil printing machine of claim 1～7, the spectroscope, reflective mirror and the light source that it is characterized in that described two light paths are for stacking up and down.
10, according to any described a kind of T type double lens image acquisition apparatus that is used for full-automatic stencil printing machine of claim 1～9, it is characterized in that described light source is connected with the shooting controller of IMAQ control and processing unit respectively with imageing sensor, the switch of control light source, and and then the collection of control steel mesh and circuit board image; The VT of imageing sensor also with the IMAQ card connection of IMAQ control and processing unit, make the image video signal of collection convert digital signal to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201540281U CN200980120Y (en) | 2006-11-30 | 2006-11-30 | T-type dual-lens image-acquisition devices for full-automatic solder paste printing process machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201540281U CN200980120Y (en) | 2006-11-30 | 2006-11-30 | T-type dual-lens image-acquisition devices for full-automatic solder paste printing process machine |
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| CN200980120Y true CN200980120Y (en) | 2007-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2006201540281U Expired - Fee Related CN200980120Y (en) | 2006-11-30 | 2006-11-30 | T-type dual-lens image-acquisition devices for full-automatic solder paste printing process machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398735A (en) * | 2013-07-23 | 2013-11-20 | 中国电子科技集团公司第四十五研究所 | CCD (Charge Coupled Device) regulation device for printing machine |
-
2006
- 2006-11-30 CN CNU2006201540281U patent/CN200980120Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398735A (en) * | 2013-07-23 | 2013-11-20 | 中国电子科技集团公司第四十五研究所 | CCD (Charge Coupled Device) regulation device for printing machine |
| CN103398735B (en) * | 2013-07-23 | 2016-08-10 | 中国电子科技集团公司第四十五研究所 | Printer CCD adjusting means |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071121 Termination date: 20121130 |