CN104197850A - Component pin detection method and device based on machine vision - Google Patents
Component pin detection method and device based on machine vision Download PDFInfo
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- CN104197850A CN104197850A CN201410390282.0A CN201410390282A CN104197850A CN 104197850 A CN104197850 A CN 104197850A CN 201410390282 A CN201410390282 A CN 201410390282A CN 104197850 A CN104197850 A CN 104197850A
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Abstract
The invention discloses a component pin detection method and device based on machine vision. The method comprises: building a light plane, which only illuminates pins of a component to be detected, at a detection area; collecting images of the pins of the component to be detected by using a detection lends; transmitting the collected images to a detection computer to perform corresponding treatment, and thereby achieving detection on the pins of the components to be detected. The device specifically comprise a detection lens and an illuminating device, wherein the detection lens is connected to a detection computer, a light plane is formed under illuminating of the light source of the illuminating device, the light plane illuminates the pins of the component to be detected, and then quantity, distance and postures of the pins of the components to be detected, as well as defects, such as lack in quantity, deflection and the like, of the pins of the components to be detected can be detected through the cooperation of the detection lens. The component pin detection device based on machine vision is simple in structure and easy to operate; according to the component pin detection method and device based on machine vision automatic detection of the quantity, distance and postures of the pins of the components to be detected can be achieved, defects, such as lack in quantity, deflection and the like, of the pins of the components to be detected also can be detected, and detection efficiency is greatly improved.
Description
Technical field
The present invention relates to Machine Vision Detection field, relate in particular to the automatic detection field of element pin.
Background technology
At present, pin products completes after production process, how by the artificial directly number of pin of visual detection chip, and with the lead pin pitch of kind of calliper chip.The mode of Manual Visual Inspection wastes time and energy, and manual intervention is too many, has the factors of instability.
In recent years, machine vision is as the cutting edge technology of robotization industry, by feat of vision system noncontact, the outstanding advantage such as speed is fast, precision is high, on-the-spot antijamming capability is strong, in manufacturing industry, is widely used, and obtained huge economic benefit.In production in enormous quantities, Vision Builder for Automated Inspection can be fast, the quality of testing product accurately and efficiently, compares with adopting human eye detection, and production efficiency is greatly improved.The current Machine Vision Detection for element pin, lighting system is all generally the detection mode of continuing to use surface mount elements, adopt the light source of a plurality of angular illumination, its range of exposures is larger, when illuminating pin, conventionally component body is also illuminated, when component body color is more shallow or during surface reflection, pin figure picture is often difficult to distinguish from this volume image, and this is the main cause of the less employing Machine Vision Detection of current pin elements.
Under this background, the applicant has proposed a kind of element pin detection method and device thereof based on machine vision, proposes this case application.
Summary of the invention
The object of the invention is to overcome the defect of prior art, a kind of element pin detection method and device thereof based on machine vision is provided, simple in structure, easy operating, the automatic detection of quantity, spacing and the attitude of element pin can be realized, also the defects detection such as element number of pin is incomplete, crooked can be realized.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of element pin detection method based on machine vision, this detection method is to build an optical plane at surveyed area, optical plane is only for the pin that illuminates element under test, utilize subsequently detector lens to carry out image acquisition to the pin of element under test, and the image transmitting collecting is given and detected computer, by detecting computer, the image collecting is carried out to respective handling, can realize the pin senses to element under test.
An element pin detection device based on machine vision, this pick-up unit comprises detector lens, illumination apparatus, described detector lens connects detection computer; Illumination apparatus has one or more light sources, and light source penetrates optical plane, and optical plane illuminates the pin of element under test.
The optical plane that described light source penetrates is limited in the scope of pin height of element under test, makes optical plane can only illuminate the pin of element under test and can not illuminate the body of element under test.
The optical plane that the camera lens optical axis of described detector lens penetrates perpendicular to described light source.
The present invention is a kind of element pin detection method and device thereof based on machine vision, and compared with prior art, advantage of the present invention comprises:
(1) mode with detector lens acquisition elements pin figure picture detects, and can replace human eye detection completely and be better than human eye detection, can be automatically, quickly and accurately the quantity of element pin, spacing and attitude are detected.
(2) irradiating angle of the light source of this programme is limited within the scope of certain thickness, and guarantee only to illuminate element under test pin and can not illuminate the body of element under test, thus the image of outstanding pin.
accompanying drawing explanation:
Fig. 1 is element pin detection method and the structural representation of device in one embodiment thereof based on machine vision of the present invention;
Fig. 2 is the structure right view in embodiment illustrated in fig. 1.
embodiment:
Below in conjunction with accompanying drawing, specific embodiments of the invention are done to a detailed elaboration.
As shown in Figure 1, 2, element pin detection method based on machine vision provided by the invention is to build an optical plane 22 at surveyed area, optical plane 22 is only for the pin 41 that illuminates element under test, utilize subsequently the pin 41 of 1 pair of element under test of detector lens to carry out image acquisition, and the image transmitting collecting is given and detected computer, by detecting computer, the image collecting is carried out to respective handling, can realize the pin senses to element under test; Comprise the automatic detection of the quantity, spacing and the attitude that realize element under test pin, also can realize the defects detection such as element number of pin is incomplete, crooked.The present invention is limited within the scope of certain thickness by the irradiating angle of management and control light source, the body that guarantees only to illuminate element under test pin and can not illuminate element under test, the color of minimizing element under test body or surface reflection etc. affect pin image resolution, thereby the image of outstanding pin, with can be automatically, detect quickly and accurately.
As shown in Figure 1, 2, for said method, the present invention also provides a kind of element pin detection device based on machine vision, and this pick-up unit comprises detector lens 1, illumination apparatus 2, and described detector lens 1 connects detection computer; Illumination apparatus 2 has one or more light sources 21, and light source 21 penetrates optical plane 22, and optical plane 22 illuminates the pin 41 of element under test 4.In the present embodiment, light source 21 comprises two, certainly, in reality detects, can accelerate according to actual detection case, obtains optical plane 22, as session and lighting angle etc. are set by control is luminous.In figure, light source 21 is line source, the optical plane 22 of each line source overlaps and is limited within the scope of certain thickness, in the present embodiment, the optical plane 22 that preferred described light source 21 penetrates is limited in the scope of pin 41 height of element under test 4, the direction vertical light plane 22 that the pin 41 of element under test 4 is normally extended, makes optical plane 22 can only illuminate the pin 41 of element under test 4 and can not illuminate the body of element under test 4.In figure, the optical plane 22 that the camera lens optical axis of detector lens 1 penetrates perpendicular to described light source 21, make the pin 41 phase isologues of detector lens 1 and element under test 4, be beneficial to the automatic detection of quantity, spacing and the attitude of element under test pin, also can realize the defects detection such as element number of pin is incomplete, crooked; Simple in structure, easy operating.
In the present embodiment, detector lens 1 connects detection computer, reach image transmitting and processing, and the image transmitting adopting and detecting processing system is prior art, and in this not go into detail.
The course of work of the present invention is: the pin of element under test 4 is placed on the optical plane 22 that the light source of illumination apparatus 2 penetrates, pin by 2 pairs of element under tests 4 of illumination apparatus is implemented illumination, pin by 1 pair of element under test 4 of detector lens carries out image acquisition, and the image transmitting collecting is given and detected computer, by detecting computer, the image collecting is carried out to respective handling, can detect number of pin, spacing and the attitude of element under test 4, or the defect such as element number of pin is incomplete, crooked.
Another embodiment of the present invention is: on the basis of above-described embodiment, be equipped with existing mechanical hand mounting technology, can complete the fully automatic circuit board plug-in unit work of high speed, precision.
Above combination embodiment describes in detail the present invention, is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art understand content of the present invention, does not form limiting the scope of the present invention.Therefore all any modifications of doing according to the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection domain of the present invention.
Claims (4)
1. the element pin detection method based on machine vision, it is characterized in that, this detection method is to build an optical plane at surveyed area, optical plane is only for the pin that illuminates element under test, utilize subsequently detector lens to carry out image acquisition to the pin of element under test, and the image transmitting collecting is given and detected computer, by detecting computer, the image collecting is carried out to respective handling, can realize the pin senses to element under test.
2. the element pin detection device based on machine vision, is characterized in that: this pick-up unit comprises detector lens (1), illumination apparatus (2), and described detector lens (1) connects detection computer; Illumination apparatus (2) has one or more light sources (21), and light source (21) penetrates optical plane (22), and optical plane (22) illuminates the pin (41) of element under test (4).
3. a kind of element pin detection device based on machine vision according to claim 2, it is characterized in that: the optical plane (22) that described light source (21) penetrates is limited in the scope of pin (41) height of element under test (4), make optical plane (22) can only illuminate the pin (41) of element under test (4) and can not illuminate the body of element under test (4).
4. a kind of element pin detection device based on machine vision according to claim 2, is characterized in that: the optical plane (22) that the camera lens optical axis of described detector lens (1) penetrates perpendicular to described light source (21).
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| CN201410390282.0A CN104197850A (en) | 2014-08-11 | 2014-08-11 | Component pin detection method and device based on machine vision |
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| CN201410390282.0A CN104197850A (en) | 2014-08-11 | 2014-08-11 | Component pin detection method and device based on machine vision |
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| CN105222752A (en) * | 2015-09-29 | 2016-01-06 | 中国民用航空总局第二研究所 | A kind of portable road face pick-up unit and method using structured light |
| CN105424714A (en) * | 2015-12-21 | 2016-03-23 | 南京河豚自动化科技有限公司 | Multi-pin-based defect detection device and detection method thereof |
| CN107144710A (en) * | 2017-06-27 | 2017-09-08 | 深圳市宇顺工业智能科技有限公司 | A kind of PCB test board cablings of LCDs pin |
| CN109459436A (en) * | 2018-09-13 | 2019-03-12 | 深圳市卓精微智能机器人设备有限公司 | A kind of method that more algorithm superpositions judge the deformation of high-density semiconductor chip pin |
| CN110286122A (en) * | 2019-06-03 | 2019-09-27 | 广东奥普特科技股份有限公司 | A kind of fiber device for vision-based detection |
| CN112629444A (en) * | 2021-03-08 | 2021-04-09 | 南京航空航天大学 | Automatic correction method for radiation library cover plate dropping errors based on machine vision |
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| CN107144710B (en) * | 2017-06-27 | 2019-08-27 | 深圳市宇顺工业智能科技有限公司 | A kind of PCB test board cabling of liquid crystal display pin |
| CN109459436A (en) * | 2018-09-13 | 2019-03-12 | 深圳市卓精微智能机器人设备有限公司 | A kind of method that more algorithm superpositions judge the deformation of high-density semiconductor chip pin |
| CN110286122A (en) * | 2019-06-03 | 2019-09-27 | 广东奥普特科技股份有限公司 | A kind of fiber device for vision-based detection |
| CN112629444A (en) * | 2021-03-08 | 2021-04-09 | 南京航空航天大学 | Automatic correction method for radiation library cover plate dropping errors based on machine vision |
| CN112629444B (en) * | 2021-03-08 | 2021-06-22 | 南京航空航天大学 | Automatic correction method for radiation library cover plate dropping errors based on machine vision |
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