CN202189016U - Laser-assisted detection device for volume defect of smooth and clean surface - Google Patents
Laser-assisted detection device for volume defect of smooth and clean surface Download PDFInfo
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- CN202189016U CN202189016U CN2011201737356U CN201120173735U CN202189016U CN 202189016 U CN202189016 U CN 202189016U CN 2011201737356 U CN2011201737356 U CN 2011201737356U CN 201120173735 U CN201120173735 U CN 201120173735U CN 202189016 U CN202189016 U CN 202189016U
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Abstract
The utility model discloses a laser-assisted detection device for a volume defect of a smooth and clean surface. The laser-assisted detection device comprises a laser transmitter, a beam expander, a smooth and clean surface, a white paper screen, a fine-adjustment rotating disk, a camera with a high dynamic range and a corresponding bracket which are sequentially arranged according to a light path and an imaging path. The laser-assisted detection device has the advantages and effects: laser is used as a light source, and the beam expander is used for expanding a laser beam until the laser beam is enough to cover the whole smooth and clean surface. Then, a reflective light ray of the smooth and clean surface is projected to the screen so as to reduce laser intensity; and the camera with the high dynamic range is used for obtaining the tiny variation of a pixel gray value of the smooth and clean surface, and then obtaining a scratching defect image clearly. The entire system of the laser-assisted detection device has simple circuit structure; and by adopting the laser-assisted detection device, the industrial production cost is reduced while the defect detecting area of the smooth and clean surface can be effectively obtained, and in addition, a high contrast ratio is achieved and a detected area is ensured to have enough integral luminance while the scratching defect image of the smooth and clean surface is obtained.
Description
Technical field
The utility model relates to the device of element smooth finish surface defects detection, relates in particular to the auxiliary smooth finish surface volume defect pick-up unit of a kind of laser.
Background technology
At present in China; Defects detection to a class object of any surface finish all is to adopt visual method; Incandescent lamp is gathered in element surface to be detected, human eye utilize transmission and method for reflection one by one the observation of zonule finally make an artificial subjective roughly quantitative conclusion by the scattered light picture that surface imperfection produces; Judge whether it is specification product; This detection mode since subjective factor to get involved the accuracy cause detecting low and efficient is not high, particularly for large batch of production, exist especially speed of production fast with the slow contradiction that this is given prominence to of detection speed.Therefore the defect detecting system of robotization can replace the detection of manual type, and can on production line, reduce the cost of manpower and time.Current China is in the research in Machine Vision Detection field, and is few to the defect detecting device or the systematic study of a class object of smooth finish surface, especially to the research of the scratch defects pick-up unit of smooth finish surface still less.
The present defect inspection method of a class object of any surface finish is according to defect area the different scattering properties of light to be differentiated mostly: the most basically and commonly used be visual method, through visual or magnifier observation, defective is presented dark picture or bright image by distinct methods; The various scattered lights that utilize tiny laser beam and hemisphere collection detection surface based on full integral scattering technology to analyze scattering microscope; Utilize laser diffraction spectrogram identification the carrying out scanning imagery of defective in addition; The contourgraph of laser interference imaging etc.But there are its weak point in these methods or system: the uncertainty of visual method and poor efficiency; Surveyed area is less; Pick-up unit is more high than complicacy or cost.
Since the scratch defects position of smooth finish surface be at random and the form of expression varied, the defect area that makes smooth finish surface occurs uncertain for the reflection of directional light, thus the defect image that causes gathering has uncertainty.For example cut has the different of thickness and the depth, and protrusion type cut and depressed cut are also arranged.Therefore wherein, the protrusion type cut makes that the cut in the image is comparatively obvious because bossed part is come reflection source when shooting, and the depressed cut is not owing to there is the jut can reflection source, obtains through shooting and make that this cut is difficult.In order to give prominence to the gray feature amount of workpiece to be detected as much as possible; When increasing contrast; Should guarantee that also there are enough overall brightnesses in zone to be detected; The light source package that enables to reach simultaneously these two image requests is not easy to realize, also do not have a kind of light source package or pick-up unit of defect image that can the bright and clean body surface of reliable acquisition at present.
Summary of the invention
In order to overcome the shortcoming and defect of prior art, the utility model provides a kind of defects detection simple in structure, that can effectively obtain smooth finish surface the regional auxiliary smooth finish surface volume defect pick-up unit of laser.
The utility model is realized through following technical proposals:
A kind of laser is assisted smooth finish surface volume defect pick-up unit, comprises according to light path, and the imaging path is placed on laser generator, beam expanding lens on the brace table successively, is used to place fine setting rotating disc, screen, the video camera of smooth finish surface body.
Said laser generator, beam expanding lens, fine setting rotating disc, screen, video camera are positioned on the brace table through support respectively; Said support is a stretching structure.
The height of said laser generator and brace table is 190mm; Said beam expanding lens and laser generator are at same vertical plane.
The laser beam of said laser generator is aimed at the mirror heart of beam expanding lens, and laser generator and beam expanding lens horizontal range are 60mm.
Said fine setting rotating disc and laser generator are at same vertical plane, and the height of said fine setting rotating disc and brace table is 150mm, and with the beam expanding lens horizontal range be 1070mm.
Compared with prior art, advantage of the utility model and effect are:
1) the utility model can expand bundle through beam expander, make the laser beam that expands behind the bundle can cover the smooth finish surface that will detect.
2) the utility model fine setting rotating disc is a mechanism that can finely tune angle; The smooth finish surface body that desire is detected is positioned over its top; Through the fine setting rotating disc, the deflection angle of adjustment smooth finish surface body is so that smooth finish surface receives the best irradiating angle that expands the laser beam after restrainting.
3) if directly with camera smooth finish surface to be detected; Then can be strong excessively because of laser intensity; And make video camera can't know the image that irradiates smooth finish surface; Therefore designed a screen (blank sheet of paper screen) in this defect detecting device, this design not only can be lowered the intensity of laser, can also improve the uneven problem of LASER Light Source.
4) from the ray cast of smooth finish surface reflection to screen, adjust the deflection angle of blank sheet of paper screen through the fixing support of blank sheet of paper screen, it is the most clear to make the defect area of smooth finish surface project the pattern of blank sheet of paper screen.
5) the utility model technological means is simple and easy to do, and low production cost has positive beneficial technical effects.
Description of drawings
Fig. 1 is the side structure signal for the utility model.
Fig. 2 is the plan structure signal for the utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is done further explain, but the embodiment of the utility model is not limited thereto.
Embodiment:
As shown in Figure 1; The utility model laser is assisted bright and clean surface defect detection apparatus; Comprise that according to light path the imaging path is placed on laser generator 1, the beam expanding lens 2 on the brace table 12, the fine setting rotating disc 3 that is used to place smooth finish surface body 4, screen 5, video camera 6 successively.Said laser generator 1, beam expanding lens 2, fine setting rotating disc 3, screen 5, video camera 6 are positioned on the brace table 12 through support 7,8,9,10,11 respectively; Said support 7,8,9,10,11 is flexible adjustable structure.
As shown in Figure 1, laser generator 1 adopts green laser, and wavelength is 532nm, and power is 50mW.With support 7 laser generator 1 is fixed on the brace table 12, level altitude is 190mm.Place beam expanding lens 2 with laser generator 1 same vertical plane, beam expanding lens 2 is fixed on the brace table 12, make the mirror heart of the laser beam aligning beam expanding lens 2 of laser generator 1, and laser generator 1 is 60mm with beam expanding lens 2 horizontal ranges with support 8.Place fine setting rotating disc 3 with the same vertical plane of laser generator 1, will finely tune rotating disc 3 with support 9 and be fixed on the brace table 12, level altitude is 150mm, and with beam expanding lens 2 horizontal ranges be 1070mm.Smooth finish surface body 4 is positioned on the fine setting rotating disc 3, and adjustment fine setting rotating disc 3 makes deflection angle 15 degree.According to the light reflection direction; Be that 70mm place placement screen 5 (adopting blank sheet of paper as screen 5) is fixed on screen 5 on the brace table 12 with support 10 with finely tuning rotating disc 3 horizontal ranges; And screen 5 deflection angles are about 15 degree, and the plane of the plane of smooth finish surface body 4 and screen 5 is parallel to each other.This instance adopts high dynamic video camera, and dynamic range is 120dB, with support 11 video camera 6 is fixed on the brace table 12, and level altitude is about 185mm, makes video camera 6 and screen 5 horizontal ranges be about 670mm simultaneously.
As shown in Figure 2, the tiny light beam that laser generator 1 sends expands bundle through beam expanding lens 2, expand behind the bundle laser beam irradiation to and be enough to contain whole smooth finish surface 4.Adjustment fine setting rotating disc 3, the best irradiating angle of the laser beam that smooth finish surface body 4 is received expand bundle, the deflection angle of this instance is 15 degree.Then, the reflection ray of smooth finish surface body 4 project become deflection angle be 15 the degree screen 5 on.Obtain the reflection ray of screen 5 at last by camera 6 (for high dynamically camera).
Just can realize the utility model preferably as stated.
The foregoing description is the utility model preferred implementation; But the embodiment of the utility model is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit and the principle of the utility model, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within the protection domain of the utility model.
Claims (6)
1. the auxiliary smooth finish surface volume defect pick-up unit of a laser is characterized in that, comprises according to light path, and the imaging path is placed on laser generator, beam expanding lens on the brace table successively, is used to place fine setting rotating disc, screen, the video camera of smooth finish surface body.
2. laser according to claim 1 is assisted smooth finish surface volume defect pick-up unit, it is characterized in that said laser generator, beam expanding lens, fine setting rotating disc, screen, video camera are positioned on the brace table through support respectively.
3. laser according to claim 1 and 2 is assisted smooth finish surface volume defect pick-up unit, it is characterized in that the height of said laser generator and brace table is 190mm; Said beam expanding lens and laser generator are at same vertical plane.
4. laser according to claim 1 and 2 is assisted smooth finish surface volume defect pick-up unit, it is characterized in that, the laser beam of said laser generator is aimed at the mirror heart of beam expanding lens, and laser generator and beam expanding lens horizontal range are 60mm.
5. laser according to claim 1 and 2 is assisted smooth finish surface volume defect pick-up unit; It is characterized in that; Said fine setting rotating disc and laser generator are at same vertical plane, and the height of said fine setting rotating disc and brace table is 150mm, and with the beam expanding lens horizontal range be 1070mm.
6. laser according to claim 2 is assisted smooth finish surface volume defect pick-up unit, it is characterized in that said support is a stretching structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201737356U CN202189016U (en) | 2011-05-27 | 2011-05-27 | Laser-assisted detection device for volume defect of smooth and clean surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201737356U CN202189016U (en) | 2011-05-27 | 2011-05-27 | Laser-assisted detection device for volume defect of smooth and clean surface |
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| Publication Number | Publication Date |
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| CN202189016U true CN202189016U (en) | 2012-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201737356U Expired - Fee Related CN202189016U (en) | 2011-05-27 | 2011-05-27 | Laser-assisted detection device for volume defect of smooth and clean surface |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604391A (en) * | 2013-11-30 | 2014-02-26 | 新乡市天光科技有限公司 | Concave surface and convex surface detecting method and device of object with concave surface and convex surface being mirror reflection surfaces |
| CN105783727A (en) * | 2016-05-04 | 2016-07-20 | 成都贝森伟任科技有限责任公司 | Improved metal plate surface detection device |
| CN105953728A (en) * | 2016-05-04 | 2016-09-21 | 成都贝森伟任科技有限责任公司 | Metal plate surface detector |
| CN109001217A (en) * | 2018-08-25 | 2018-12-14 | 深圳市木森科技有限公司 | A kind of detection method and detection device of phone housing defect |
| CN109580660A (en) * | 2018-12-29 | 2019-04-05 | 重庆荣成玻璃制品有限公司 | Glass production side optical detection device |
| CN112666168A (en) * | 2020-12-29 | 2021-04-16 | 尚越光电科技股份有限公司 | Rapid detection system for roll-to-roll surface of stainless steel substrate of CIGS battery piece |
-
2011
- 2011-05-27 CN CN2011201737356U patent/CN202189016U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604391A (en) * | 2013-11-30 | 2014-02-26 | 新乡市天光科技有限公司 | Concave surface and convex surface detecting method and device of object with concave surface and convex surface being mirror reflection surfaces |
| CN105783727A (en) * | 2016-05-04 | 2016-07-20 | 成都贝森伟任科技有限责任公司 | Improved metal plate surface detection device |
| CN105953728A (en) * | 2016-05-04 | 2016-09-21 | 成都贝森伟任科技有限责任公司 | Metal plate surface detector |
| CN109001217A (en) * | 2018-08-25 | 2018-12-14 | 深圳市木森科技有限公司 | A kind of detection method and detection device of phone housing defect |
| CN109580660A (en) * | 2018-12-29 | 2019-04-05 | 重庆荣成玻璃制品有限公司 | Glass production side optical detection device |
| CN112666168A (en) * | 2020-12-29 | 2021-04-16 | 尚越光电科技股份有限公司 | Rapid detection system for roll-to-roll surface of stainless steel substrate of CIGS battery piece |
| CN112666168B (en) * | 2020-12-29 | 2022-08-05 | 尚越光电科技股份有限公司 | Rapid detection system for roll-to-roll surface of stainless steel substrate of CIGS battery piece |
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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: 20120411 Termination date: 20140527 |