CN102155675B - Three-dimensional lighting device applied to machine vision system - Google Patents
Three-dimensional lighting device applied to machine vision system Download PDFInfo
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- CN102155675B CN102155675B CN201010605452A CN201010605452A CN102155675B CN 102155675 B CN102155675 B CN 102155675B CN 201010605452 A CN201010605452 A CN 201010605452A CN 201010605452 A CN201010605452 A CN 201010605452A CN 102155675 B CN102155675 B CN 102155675B
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- lamp pearl
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Abstract
The invention discloses a three-dimensional lighting device applied to a machine vision system. The three-dimensional lighting device comprises a front-field lighting source and a rear-field lighting source which are positioned above an imaging view field of the machine vision system, wherein the front-field lighting source comprises three light emitting diode (LED) lamp beads; each LED lamp bead is provided with a diverging lens; the three LED lamp beads form mutually overlapped light spots at the central position of the imaging view field; the rear-field lighting source comprises an LED lamp bead and a diverging lens optically matched with the LED lamp bead of the rear-field lighting source; and the emergent light of the LED lamp bead of the rear-field lighting source passes through one piece of frosted glass and forms a light spot at the central position of the imaging view field.
Description
Technical field
The present invention relates to the NI Vision Builder for Automated Inspection lighting field, relate in particular to universal digital projective measuring instrument lighting field, be specially a kind of three-dimensional lighting device that is applied to NI Vision Builder for Automated Inspection.
Background technology
The application of NI Vision Builder for Automated Inspection and range of application are very extensive; It is not simply to replace human eye; It is the important means and the instrument of scientific research, also is industrial production automation and informationalized important component part, also for people's daily life and public safety powerful guarantee is provided.The core of NI Vision Builder for Automated Inspection is IMAQ and processing, and all information all derive from image, and the quality of image itself is very crucial to whole vision system.Light source then is the key factor that influences NI Vision Builder for Automated Inspection picture quality.In recent years, along with the deep development of machine vision technique, new demand is proposed constantly also supporting with it secondary light source illuminator.
Through suitable light illumination design; Make target and background information in the image obtain optimal separation; Can reduce the difficulty that image processing algorithm is cut apart, discerned greatly, improve location, the certainty of measurement of system simultaneously, the reliability of system and combination property are improved.Otherwise,, can cause in image processing algorithm design and imaging system design, getting half the result with twice the effort if light source design is improper.Therefore, the light-source illuminating system design is the primary factor of decision systems design success or failure.
Summary of the invention
The purpose of this invention is to provide a kind of three-dimensional lighting device that is applied to NI Vision Builder for Automated Inspection, with realize the machine vision imaging system can access high-resolution, illumination evenly, the purpose of the image of no shadow.
In order to achieve the above object, the technical scheme that the present invention adopted is:
Be applied to the three-dimensional lighting device of NI Vision Builder for Automated Inspection; Comprise the imaging viewing field top that is positioned at NI Vision Builder for Automated Inspection the front court lighting source, be positioned at the back court lighting source of said imaging viewing field below; It is characterized in that: said front court lighting source comprises three LED lamp pearls of arranging by the equilateral triangle face parallel with said imaging viewing field; Each LED lamp pearl is furnished with its optics and cooperates divergent lens; Three LED lamp pearls all are positioned at its each self-corresponding divergent lens along; Three LED lamp pearls are angled through the emergent light direction and the said equilateral triangle face centre normal direction of each self-corresponding divergent lens, and form the hot spot that overlaps in said imaging viewing field center respectively; Said back court lighting source comprises LED lamp pearl; Reach with back court lighting source LED lamp pearly-lustre and cooperate divergent lens; The LED lamp pearl of said back court lighting source is positioned at its corresponding divergent lens along, in the back court lighting source LED lamp pearl through the emergent light of its corresponding divergent lens again through form hot spot behind the ground glass in said imaging viewing field center.
Compare other light sources such as existing spot light, annular light source, area source, a three-dimensional illumination was applicable to multiple lighting demand before and after the present invention had realized.Three LED lamp pearls of illumination can be approximated to be spot light in the light source of front court, and its light that sends forms directionality type parallel rays preferably through divergent lens.Three groups of light converge at a zone in the target visual field, produced a no shadow, Gao Liang, front court illumination uniformly.The light that a LED lamp of back court pearl sends has formed an even brightness circular light spot through behind the divergent lens on imaging viewing field, this hot spot is handled through the scattering of ground glass, in the visual field, has formed a class lambert type back court lighting source.
The present invention is simple in structure, practical, can in the imaging viewing field of specified scope, produce field, the front and back illumination of enough brightness, and the illumination that in imaging viewing field, produces is comparatively even.
Description of drawings
Fig. 1 is a specific embodiment of the invention structure external view.
Fig. 2 is a specific embodiment of the invention structure perspective view.
Fig. 3 is a drive circuit schematic diagram of the present invention.
The specific embodiment
Like Fig. 1, shown in Figure 2.Measuring table 2 tops are provided with optical table 1; Measuring table 2 belows are equipped with hollow cylinder chamber 3; Optical table 1, measuring table 2 are level; The central point of optical table 1, measuring table 2 all is positioned on the central axis in hollow cylinder chamber 3, and hollow cylinder chamber 3 is a ground glass 6 with measuring table 2 junctions.Three paster LED lamp pearl 5-1 of front court lighting source and each self-corresponding angle of divergence thereof are that the dispersing lens 4-1 of 8 degree is distributed in optical table 1 bottom by equilateral triangle; The equilateral triangle center that optical table 1 is positioned at three paster LED lamp pearl 5-1 formations has the through hole 7 that supplies video camera to stretch into; The paster LED lamp pearl 5-2 of back court lighting source and corresponding angle of scattering thereof are that the dispersing lens 4-2 of 25 degree is positioned at 3 bottoms, hollow cylinder chamber; The front court lighting source forms hot spot at ground glass 6 places of measuring table 2, and the back court lighting source also forms hot spot at ground glass 6 places of measuring table 2.
The front court lighting source divides three primitives; Each primitive is respectively by dispersing lens 4-1; Paster LED lamp pearl 5-1 forms, and the optical axis of each primitive and light source center wire clamp angle are 17 degree, and primitive is 120 millimeters to the height of measuring table 2; Distance between the primitive is 80 millimeters, and above parameter can guarantee that the outgoing hot spot of three primitives is overlapping on measuring table 2.The back court lighting source is made up of dispersing lens 4-2 and paster LED lamp pearl 5-2; It is 112 millimeters that paster LED lamp pearl 5-2 forms ground glass 6 distances; The dispersion angle of dispersing lens 4-2 is 25 degree; Ground glass 6 diameters are 5 millimeters, and above parameter can make light uniform irradiation that the lamp pearl launches on ground glass 6, forms type lambert's type light source at ground glass 6 upper surfaces.
Among the present invention; Three high bright paster LED lamp pearls are in three end points of the equilateral triangle of level; Direction of illumination is vertical direction scalenohedron shape center 17 degree, and it is 8 degree dispersing lens that each lamp pearl all is furnished with the angle of divergence, and paster LED lamp pearl is in the along of dispersing lens.The light source of building according to above-mentioned parameter can form even circular bright field illumination hot spot in the visual field.Hot spot has advantages such as area is little, and brightness is high, and uniformity is strong, is applicable to the high precision image collection of small items.
High bright paster LED lamp pearl is in 112 millimeters places under the imaging viewing field of measuring table, and direction of illumination is for straight up, and cooperating the angle of divergence is the dispersing lens of 25 degree, and paster LED lamp pearl is in the along of dispersing lens.It is in 50 millimeters the hollow cylinder chamber that this paster LED lamp pearl and dispersing lens are positioned over a diameter, and the cylindrical cavity upper surface uses the ground glass sealing, and the light that penetrates glass is played scattering process.
As shown in Figure 3.Logic control module U1 is electrically connected with two constant-current driven module U2, U3.S1, S2 are the illumination control logic input of front court and back court, and VIN and GND are the power supply input, and D1, D2, D3 are three LED lamp pearls of front court lighting source, and D4 is the LED lamp pearl of back court lighting source.S1, S2 give the power supply of front court light source (D1, D2, D3) and back court lighting source (D4) respectively through the duty of Transistor-Transistor Logic level control constant-current driven module.
Can control the duty of front court and two light sources of back court respectively through two outside Transistor-Transistor Logic level S1, S2.As the Transistor-Transistor Logic level S1 of external control, when S2 is high level, drive circuit is connected, and corresponding light source produces illumination promptly from duty in the field range of appointment.Front and back two light sources can be worked or work alone according to demand simultaneously.
Claims (2)
1. be applied to the three-dimensional lighting device of NI Vision Builder for Automated Inspection; Comprise the imaging viewing field top that is positioned at NI Vision Builder for Automated Inspection the front court lighting source, be positioned at the back court lighting source of said imaging viewing field below; It is characterized in that: said front court lighting source comprises three LED lamp pearls of arranging by the equilateral triangle face parallel with said imaging viewing field; Each LED lamp pearl is furnished with the divergent lens that cooperates with its optics; Three LED lamp pearls all are positioned at its each self-corresponding divergent lens along; Three LED lamp pearls are angled through the emergent light direction and the said equilateral triangle face centre normal direction of each self-corresponding divergent lens, and form the hot spot that overlaps in said imaging viewing field center respectively; Said back court lighting source comprises LED lamp pearl; And the divergent lens that cooperates with back court lighting source LED lamp pearly-lustre; The LED lamp pearl of said back court lighting source is positioned at its corresponding divergent lens along, in the back court lighting source LED lamp pearl through the emergent light of its corresponding divergent lens again through form hot spot behind the ground glass in said imaging viewing field center.
2. the three-dimensional lighting device that is applied to NI Vision Builder for Automated Inspection according to claim 1; It is characterized in that: also comprise drive circuit; Said drive circuit comprises a Logic control module; And two constant-current driven modules, the input input front court lighting source of said Logic control module, the control input signal of back court lighting source, the power supply termination power of Logic control module; The output of said Logic control module is connected with the power supply positive input terminal of two constant-current driven modules; The power-input of two constant-current driven modules connects power supply ground respectively, and series connection is connected to three LED lamp pearls of front court lighting source between the positive and negative output of one of them constant-current driven module, is connected to the LED lamp pearl of back court lighting source between the positive and negative output of another constant-current driven module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010605452A CN102155675B (en) | 2010-12-24 | 2010-12-24 | Three-dimensional lighting device applied to machine vision system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010605452A CN102155675B (en) | 2010-12-24 | 2010-12-24 | Three-dimensional lighting device applied to machine vision system |
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| Publication Number | Publication Date |
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| CN102155675A CN102155675A (en) | 2011-08-17 |
| CN102155675B true CN102155675B (en) | 2012-10-10 |
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| CN201010605452A Expired - Fee Related CN102155675B (en) | 2010-12-24 | 2010-12-24 | Three-dimensional lighting device applied to machine vision system |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749337A (en) * | 2012-07-20 | 2012-10-24 | 上海千山远东制药机械有限公司 | Bottom polishing device applied to vision inspection of lamp inspector |
| CN104763928B (en) * | 2015-03-23 | 2017-07-18 | 广东工业大学 | A kind of LED light source and its control method for NI Vision Builder for Automated Inspection |
| DE102016111600B4 (en) * | 2015-06-26 | 2021-12-30 | Cognex Corporation | Lighting arrangement |
| US9857060B2 (en) * | 2016-04-02 | 2018-01-02 | Wing Kong Lo | LED illumination control systems and methods |
| CN106594685B (en) * | 2016-12-20 | 2023-05-09 | 大连民族大学 | Combined type light source bracket for machine vision |
| CN108286673B (en) * | 2017-01-09 | 2019-09-17 | 河北科技大学 | A kind of light source for automotive hub mounting hole vision measurement |
| CN108563085A (en) * | 2017-12-29 | 2018-09-21 | 深圳市共进电子股份有限公司 | A kind of machine vision light source |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1203304C (en) * | 2003-06-19 | 2005-05-25 | 上海交通大学 | System of recognizing quality of amphisarca in high speed based on machine vision |
| CN100441063C (en) * | 2004-07-28 | 2008-12-03 | 哈尔滨工业大学 | Lighting source device of adaptive regulating light-intensity in machine visual measuring system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1455179A1 (en) * | 2003-03-07 | 2004-09-08 | MV Research Limited | A machine vision inspection system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1203304C (en) * | 2003-06-19 | 2005-05-25 | 上海交通大学 | System of recognizing quality of amphisarca in high speed based on machine vision |
| CN100441063C (en) * | 2004-07-28 | 2008-12-03 | 哈尔滨工业大学 | Lighting source device of adaptive regulating light-intensity in machine visual measuring system |
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| CN102155675A (en) | 2011-08-17 |
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