CN102340915A - Machine vision light source luminance real-time regulating method and special system thereof in quality detection - Google Patents
Machine vision light source luminance real-time regulating method and special system thereof in quality detection Download PDFInfo
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- CN102340915A CN102340915A CN2011102528653A CN201110252865A CN102340915A CN 102340915 A CN102340915 A CN 102340915A CN 2011102528653 A CN2011102528653 A CN 2011102528653A CN 201110252865 A CN201110252865 A CN 201110252865A CN 102340915 A CN102340915 A CN 102340915A
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Abstract
The invention discloses a machine vision light source luminance real-time regulating method in quality detection, which comprises the steps of: acquiring an image of an object to be detected, transmitting the image to a computer, analyzing an RGB (Red Green Blue) value of a shot picture by using an image processing module in the computer to obtain a luminance value of a current light source, and when the luminance of the light source changes, sending a command to a constant-current controller by the computer, compensating a working current of the light source by the constant-current controller according to the command of the computer to ensure that the luminance of the light source is kept constant. The invention also discloses a special system of the method, which comprises a light source device, an intelligent constant-current controller connected with the light source device and used for providing electricity to the light source device, the image acquisition device arranged above the light source and a computer connected with the image acquisition device and the intelligent constant-current controller. The machine vision light source luminance real-time regulating method and the special device thereof have the characteristic of ensuring that the luminance of the light source is kept constant in a working process by adopting the constant-current regulation.
Description
Technical field
The present invention relates to electronic product Quality Detection technical field, is machine vision in a kind of Quality Detection specifically
Light source brightness control method and dedicated system thereof.
Background technology
In suitability for industrialized production, intelligentized Quality Detection is generally used in the whole world, and the machine vision light source is the core component in this detection system.Light source is connected with a controller, and most of light sources are realized through controller regulator potentiometer (variable resistor) the control of its voltage, electric current; Through regulating operating voltage, the electric current that variable-resistance resistance value changes light source, thus the brightness of may command light source; But above control mode can not be controlled in real time, and when the brightness of light source changed, the voltage and current that controller provides can't compensate automatically, and it is constant that light-source brightness can not keep.
Summary of the invention
Task of the present invention is to solve the prior art problem, and a kind of machine vision light-source system that can real-time regulated brightness is provided, and makes light-source brightness can keep constant.
Technological means: the invention discloses the real-time method of adjustment of machine vision light-source brightness in a kind of Quality Detection, this method comprises:
1) led light source is connected the operating current source as led light source with intelligent constant-current controller, intelligent constant-current controller and computer carry out exchanges data;
2) operating current of preset light source, intelligent constant-current controller is monitored the operating current of light source in real time, and when operating current generation deviation, intelligent constant-current controller carries out current compensation automatically, makes light source remain on the state work down of constant current;
3) realize through following measures, promptly when led light source shines directly into object to be detected, obtain the image of object to be detected; And image is transferred to computer; The rgb value that utilizes image processing module in the computer to analyze captured picture obtains the brightness value of current light source in real time, and when light-source brightness changed, computer sent instruction and gives intelligent constant-current controller; The intelligence constant-current controller makes light-source brightness keep constant according to the operating current of the instruction adjustment light source of computer.
The invention also discloses a kind of machine vision light-source system that can adjust light-source brightness in real time that is used for said method, this machine vision light-source system comprises led light source equipment, be connected with light source and be the intelligent constant-current controller of its power supply, the computer that is arranged on the image capture device of light source top and is connected with intelligent constant-current controller with image capture device respectively; Wherein in computer, be provided with light source identification module and control module, light source identification module is sent instruction through control module to intelligent constant-current controller.
The cross section of light source is an annular, and the centre of its ring is the collection fenestra of image capture device; Light source comprises one group of LED, pcb board and shell, and LED is welded on the pcb board, and is assemblied in the shell.
Image capture device is an industrial camera.
Beneficial effect: the present invention utilizes image capture device to obtain the image of testing product; When detecting; Light source identification module is carried out the real-time sampling analysis to the rgb value of image, according to the result who obtains, through control module intelligent controller is sent control signal in real time; To change the parameter that light source obtains power supply, reach the effect of brightness constancy.Because temperature can exert an influence to the work of LED lamp,, promptly be the constant operating current of LED lamp input through real-time regulated so adopt the Current Regulation mode.
Description of drawings
Fig. 1 is the flow chart of the inventive method;
Fig. 2 is the structural representation of product of the present invention.
Embodiment
As shown in Figure 1, the invention discloses the real-time method of adjustment of machine vision light-source brightness in a kind of Quality Detection, this method comprises:
1) led light source is connected the operating current source as led light source with intelligent constant-current controller, intelligent constant-current controller and computer carry out exchanges data;
2) operating current of preset light source, intelligent constant-current controller is monitored the operating current of light source in real time, and when operating current generation deviation, intelligent constant-current controller carries out current compensation automatically, makes light source remain on the state work down of constant current;
3) realize through following measures; Promptly when led light source shines directly into object to be detected, obtain the image of object to be detected, and obtain the brightness value of current light source in real time through the rgb value of the captured picture of Computer Analysis; When light-source brightness changes; Computer sends instruction and gives constant-current controller, and constant-current controller makes light-source brightness keep constant according to the operating current of the instruction adjustment light source of computer.
Above-mentioned 3) can be refined as 4 steps:
Step S1: obtain detected image in real time through video capture device, and the rgb value of image is analyzed the brightness value that obtains light source in real time;
Step S2: step S1 brightness value that obtains and the brightness value that is provided with are in advance compared;
Step S3: computer sends instruction according to the result that step S2 obtains to intelligent constant-current controller;
Step S4: intelligent constant-current controller is regulated supply current accordingly according to the instruction of S3, guarantees that the brightness value of light source is constant.
Be illustrated in figure 2 as a kind of machine vision light-source system that can adjust brightness in real time disclosed by the invention, this system comprises the light source 1 that is arranged on directly over the detected material 5, be connected with light source 1 and be the intelligent constant-current controller 2 of its power supply, the computer 4 that is arranged on the image capture device 3 of light source top and is connected with intelligent constant-current controller 2 with image capture device 3 respectively; Wherein in computer 4, be provided with light source identification module 41 and control module 42, light source identification module 41 is sent instruction through control module 42 to intelligent constant-current controller 2.
The cross section of light source 1 is an annular, and the centre of its ring is the collection fenestra of image capture device 2; Light source comprises one group of LED bulb, pcb board and shell, and the LED bulb is welded on the pcb board, and is assemblied in the shell; The image capture device 3 general industrial cameras that adopt; Here using intelligent constant-current controller is that the just collimation of its optimum operating voltage can change because of the rising of LED bulb with temperature, so adopt the mode of constant flow regulation to reach optimum efficiency more easily.
Claims (4)
1. the real-time method of adjustment of machine vision light-source brightness in the Quality Detection is characterized in that this method comprises:
1) led light source is connected the operating current source as led light source with intelligent constant-current controller, intelligent constant-current controller and computer carry out exchanges data;
2) operating current of preset light source, intelligent constant-current controller is monitored the operating current of light source in real time, and when operating current generation deviation, intelligent constant-current controller carries out current compensation automatically, makes light source remain on the state work down of constant current;
3) realize through following measures; Promptly when led light source shines directly into object to be detected, obtain the image of object to be detected, and obtain the brightness value of current light source in real time through the rgb value of the captured picture of Computer Analysis; When light-source brightness changes; Computer sends instruction and gives intelligent constant-current controller, and intelligent constant-current controller makes light-source brightness keep constant according to the operating current of the instruction adjustment light source of computer.
2. the machine vision light-source system that can adjust light-source brightness in real time that is used for the said method of claim 1 is characterized in that: this machine vision light-source system comprises led light source equipment, be connected with light source and be the intelligent constant-current controller of its power supply, the computer that is arranged on the image capture device of light source top and is connected with intelligent constant-current controller with image capture device respectively; Wherein in computer, be provided with light source identification module and control module, light source identification module is sent instruction through control module to intelligent constant-current controller.
3. the machine vision light-source system that can adjust light-source brightness in real time according to claim 2 is characterized in that: the cross section of said light source is annular, and the centre of its ring is the collection fenestra of image capture device; Said light source comprises one group of LED, pcb board and shell, and LED is welded on the pcb board, and is assemblied in the shell.
4. according to claim 2 or the 3 described machine vision light-source systems that can adjust light-source brightness in real time, it is characterized in that: said image capture device is an industrial camera.
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| CN103344563A (en) * | 2013-06-07 | 2013-10-09 | 上海大学 | Vision light source detection apparatus for self-adaptive dimming color-adjusting machine and method |
| CN103841726A (en) * | 2014-03-06 | 2014-06-04 | 河南科技大学 | Luminance real-time adjusting device of light source in pole piece surface defect detection and adjusting method thereof |
| CN104113946A (en) * | 2013-04-17 | 2014-10-22 | 宝山钢铁股份有限公司 | light source illuminance adaptive control device and light source illuminance adaptive control method |
| CN104999791A (en) * | 2015-08-21 | 2015-10-28 | 苏州三体智能科技有限公司 | Vision-based circuit board printing and detection device and working method thereof |
| CN105206011A (en) * | 2014-06-10 | 2015-12-30 | 海德堡印刷机械股份公司 | Method for performing remote quality control of printed matter |
| CN105928887A (en) * | 2016-04-21 | 2016-09-07 | 广西吉然科技有限公司 | System and method for on-line detection of color value of product in virtue of high-definition shooting |
| CN106023662A (en) * | 2016-07-04 | 2016-10-12 | 宋美苏 | Electronic teaching aid |
| CN106546598A (en) * | 2016-10-28 | 2017-03-29 | 鞍钢未来钢铁研究院 | Belt steel surface detecting system light source self-adaptation control method |
| CN106550516A (en) * | 2015-09-21 | 2017-03-29 | 大族激光科技产业集团股份有限公司 | A kind of flying probe tester light-source system and its control method |
| CN107064144A (en) * | 2017-04-20 | 2017-08-18 | 浙江工商大学 | The LED brightness self-adapting regulation method differentiated suitable for retainer positive and negative |
| CN108982069A (en) * | 2018-04-20 | 2018-12-11 | 湖南品胜生物技术有限公司 | A kind of CCD detection system for DNA quantified system analysis |
| CN108982529A (en) * | 2018-09-30 | 2018-12-11 | 广州中国科学院沈阳自动化研究所分所 | A kind of power battery coating quality vision-based detection platform and detection method |
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| CN113038012A (en) * | 2021-03-16 | 2021-06-25 | 上海悦易网络信息技术有限公司 | Appearance defect detection method and equipment for intelligent terminal |
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| CN104113946A (en) * | 2013-04-17 | 2014-10-22 | 宝山钢铁股份有限公司 | light source illuminance adaptive control device and light source illuminance adaptive control method |
| CN104113946B (en) * | 2013-04-17 | 2017-02-22 | 宝山钢铁股份有限公司 | light source illuminance adaptive control device and light source illuminance adaptive control method |
| CN103344563B (en) * | 2013-06-07 | 2015-07-29 | 上海大学 | A kind of self-adaptation toning light modulation machine vision light source pick-up unit and method |
| CN103344563A (en) * | 2013-06-07 | 2013-10-09 | 上海大学 | Vision light source detection apparatus for self-adaptive dimming color-adjusting machine and method |
| CN103841726A (en) * | 2014-03-06 | 2014-06-04 | 河南科技大学 | Luminance real-time adjusting device of light source in pole piece surface defect detection and adjusting method thereof |
| CN103841726B (en) * | 2014-03-06 | 2015-09-09 | 河南科技大学 | The real-time adjusting device of light-source brightness and method of adjustment thereof in pole piece defects detection |
| CN105206011A (en) * | 2014-06-10 | 2015-12-30 | 海德堡印刷机械股份公司 | Method for performing remote quality control of printed matter |
| CN104999791A (en) * | 2015-08-21 | 2015-10-28 | 苏州三体智能科技有限公司 | Vision-based circuit board printing and detection device and working method thereof |
| CN106550516B (en) * | 2015-09-21 | 2020-01-14 | 大族激光科技产业集团股份有限公司 | Light source system of flying probe tester and control method thereof |
| CN106550516A (en) * | 2015-09-21 | 2017-03-29 | 大族激光科技产业集团股份有限公司 | A kind of flying probe tester light-source system and its control method |
| CN105928887A (en) * | 2016-04-21 | 2016-09-07 | 广西吉然科技有限公司 | System and method for on-line detection of color value of product in virtue of high-definition shooting |
| CN106023662A (en) * | 2016-07-04 | 2016-10-12 | 宋美苏 | Electronic teaching aid |
| CN106546598A (en) * | 2016-10-28 | 2017-03-29 | 鞍钢未来钢铁研究院 | Belt steel surface detecting system light source self-adaptation control method |
| CN106546598B (en) * | 2016-10-28 | 2019-09-24 | 鞍钢未来钢铁研究院有限公司 | Belt steel surface detection system light source self-adaptation control method |
| CN107064144A (en) * | 2017-04-20 | 2017-08-18 | 浙江工商大学 | The LED brightness self-adapting regulation method differentiated suitable for retainer positive and negative |
| CN108982069A (en) * | 2018-04-20 | 2018-12-11 | 湖南品胜生物技术有限公司 | A kind of CCD detection system for DNA quantified system analysis |
| CN108982529A (en) * | 2018-09-30 | 2018-12-11 | 广州中国科学院沈阳自动化研究所分所 | A kind of power battery coating quality vision-based detection platform and detection method |
| CN110132976A (en) * | 2019-04-23 | 2019-08-16 | 合刃科技（深圳）有限公司 | A kind of detection method and detection device |
| CN110132976B (en) * | 2019-04-23 | 2022-03-25 | 合刃科技（深圳）有限公司 | Detection method and detection device |
| CN113038012A (en) * | 2021-03-16 | 2021-06-25 | 上海悦易网络信息技术有限公司 | Appearance defect detection method and equipment for intelligent terminal |
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Address after: 523000 Second Floor, Executive Building No. 1 Minxing Road, Chang'an Town Corner Community, Dongguan City, Guangdong Province Patentee after: Dongguan Meng Tuo Intelligent Technology Co., Ltd. Address before: 523851 4th Floor, 118 Guanchang Road, Yongtou, Chang'an Town, Dongguan City, Guangdong Province Patentee before: Dongguan MENTO Photoelectric Technology Co., Ltd. |