CN201522265U - A visual inspection system for VCM magnetic steel - Google Patents
A visual inspection system for VCM magnetic steel Download PDFInfo
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- CN201522265U CN201522265U CN200920198741XU CN200920198741U CN201522265U CN 201522265 U CN201522265 U CN 201522265U CN 200920198741X U CN200920198741X U CN 200920198741XU CN 200920198741 U CN200920198741 U CN 200920198741U CN 201522265 U CN201522265 U CN 201522265U
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Abstract
本实用新型涉及一种VCM磁钢视觉检测系统，其特征在于：包括机械检测装置(1)、用于采集被测VCM磁钢片图像的图像采集卡(2)、光学系统单元、图像处理单元(4)和电控单元(5)，其中，机械检测装置(1)包括由底板、X轴滑台、Y轴滑台、精密平移台组成的用于放置被测VCM磁钢片的工作台，与工作台连接的用于输送待测VCM磁钢片的送料装置、与工作台连接的用于分类合格VCM磁钢片和不合格VCM磁钢片的分拣装置；电控单元(5)与图像处理单元和机械检测装置相连，控制送料装置的运动，并根据图像处理系统的输出结果，控制分拣装置的运动；与现有技术相比，本实用新型的优点在于：专为VCM磁钢视觉检测系统设计，测量精度高，检测速度快。
The utility model relates to a visual detection system for VCM magnetic steel, which is characterized in that it comprises a mechanical detection device (1), an image acquisition card (2) for collecting images of a VCM magnetic steel sheet to be tested, an optical system unit, and an image processing unit (4) and an electric control unit (5), wherein the mechanical detection device (1) includes a workbench for placing the measured VCM magnetic steel sheet composed of a base plate, an X-axis slide table, a Y-axis slide table, and a precision translation table , a feeding device connected with the worktable for conveying the VCM magnetic steel sheets to be tested, a sorting device connected with the workbench for classifying qualified VCM magnetic steel sheets and unqualified VCM magnetic steel sheets; the electric control unit (5) It is connected with the image processing unit and the mechanical detection device, controls the movement of the feeding device, and controls the movement of the sorting device according to the output result of the image processing system; compared with the prior art, the utility model has the advantage that it is specially designed for VCM magnetic Steel visual detection system design, high measurement accuracy and fast detection speed.
Description
Technical field
The utility model relates to a kind of VCM magnet steel vision detection system.
Background technology
VCM (Voice Circuit Motor voice coil motor) magnetic links is to drive hard disk drive HDD (HardDisk Drive hard disk drive) read-write head in the computing machine to move the permanent magnet magnetic steel disc in " voice coil motor ", and its quality is the essential condition that guarantees that computer hard disc driver is produced.Along with the continuous progress of computer technology and hardware, more and more higher to the quality requirements of VCM product.Except the material of strictness, processing technology, physicochemical characteristics, dimensional accuracy has become requisite technical indicator, and it is very important that VCM magnetic links overall size is detected in real time.Traditional detection method mainly contains minimax template, optical projection method or three-dimensional coordinates measurement method.Maximum, minimum template is present domestic many enterprises a kind of full detecting methods commonly used, and it is to make the minimax shape template according to the Element Design size to carry out manual detection, can not adapt to the requirement of modern industry high speed development; The optical projection method is the VCM magnetic links to be amplified the back rely on human eye to aim at measurement by the shadow screen, exists subjective error big, the shortcoming that detection speed is slow; The three-dimensional coordinates measurement method is the method for carrying out non-contact measurement with three-coordinates measuring machine, and measuring accuracy is higher, but also exists detection speed slow, the shortcoming that quantity of information is few.Optical projection method and three-dimensional coordinates measurement method can only be as sampling observations.Therefore develop the special-purpose vision detection system of VCM magnet steel and seem very urgent and real.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of VCM of being exclusively used in magnet steel detection, measuring accuracy height, the fast VCM magnet steel vision detection system of detection speed at above-mentioned prior art.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this VCM magnet steel vision detection system is characterized in that: comprise
Mechanical detection means, comprise the worktable of forming by base plate, X-axis slide unit, Y-axis slide unit, accurate translation stage that is used to place tested VCM magnetic links, the pay-off that is used to carry VCM magnetic links to be measured that is connected with worktable, being used to of being connected with worktable the classify sorting equipment of qualified VCM magnetic links and defective VCM magnetic links;
Image pick-up card is used to gather the image of tested VCM magnetic links;
Optical system unit is used for tested VCM magnetic links is thrown light on, and tested VCM magnetic links accurately is imaged on the cmos sensor of image pick-up card;
Graphics processing unit, the image of the tested VCM magnetic links that image pick-up card is collected carries out analyzing and processing, generates tested VCM magnetic links contour curve, and whether judge tested VCM magnetic links be specification product;
ECU (Electrical Control Unit) links to each other with mechanical detection means with graphics processing unit, the motion of control pay-off, and according to the output result of image processing system, the motion of control sorting equipment.
As improvement, described optical system unit comprises imaging device and lighting device, and described imaging device comprises object lens, diaphragm and cmos sensor, and wherein diaphragm is arranged on the place, focal plane, picture side of object lens, and described object lens select for use focal length to be
Relative aperture is
Field angle is
Resolution is
Object lens, wherein, y ' is the photosurface size of CMOS, y is tested VCM magnetic links linear field, and δ ' is the Pixel Dimensions of CMOS, and l is the distance between tested VCM magnetic links and the object lens, l ' is the distance between the sensitive area of object lens and cmos sensor, and λ is a light wavelength.
Described lighting device comprises backlight that is arranged on tested VCM magnetic links bottom and the lighting source that is arranged on tested VCM magnetic links top.
What described backlight adopted is 45mm * 80mm square array backlight that the red LED of 12V is formed by operating voltage; It is 96mm * 96mm rectangular illumination light source that the red LED of 12V is formed that described lighting source adopts by operating voltage.
Compared with prior art, advantage of the present utility model is: integrated mechanical detection means, image pick-up card, optical system unit, graphics processing unit and ECU (Electrical Control Unit), aim at the design of VCM magnet steel vision detection system, and the measuring accuracy height, detection speed is fast.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the structural representation of imaging device among the utility model embodiment.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
VCM magnet steel vision detection system as shown in Figure 1 mainly is made up of mechanical detection means, image pick-up card, optical system unit, graphics processing unit and ECU (Electrical Control Unit).
Mechanical detection means, comprise the worktable of forming by base plate, X-axis slide unit, Y-axis slide unit, accurate translation stage that is used to place tested VCM magnetic links, the pay-off that is used to carry VCM magnetic links to be measured that is connected with worktable, being used to of being connected with worktable the classify sorting equipment of qualified VCM magnetic links and defective VCM magnetic links; The structure of mechanical detection means adopts applicant's disclosed structure in " based on the development of monolithic processor controlled VCM magnet steel automatic checkout equipment " and " design studies of the quick, intelligent visual detection equipment of VCM magnet steel ".
VCM magnetic links to be measured is sent to successively by pay-off and accepts detection on the worktable, after detection finishes, by sorting equipment qualified VCM magnetic links and defective VCM magnetic links is separated.
Image pick-up card is used to gather the image of tested VCM magnetic links, and present embodiment adopts conventional image pick-up card.
Optical system unit is used for tested VCM magnetic links is thrown light on, and tested VCM magnetic links accurately is imaged on the cmos sensor of image pick-up card; In the present embodiment, optical system unit comprises imaging device and lighting device, and wherein imaging device comprises object lens 311, diaphragm 312 and cmos sensor, and referring to shown in Figure 2, wherein diaphragm is arranged on focal plane, the picture side place of object lens, and described object lens are selected focal distance f ' be for use
Relative aperture is
Field angle is
Resolution is
Object lens, wherein, y ' is the photosurface size of CMOS, y is tested VCM magnetic links linear field, and δ ' is the Pixel Dimensions of CMOS, and l is the distance between tested VCM magnetic links and the object lens, l ' is the distance between the sensitive area of object lens and cmos sensor, and λ is a light wavelength; Lighting device comprises the backlight that is arranged on tested VCM magnetic links bottom and is arranged on the lighting source of tested VCM magnetic links top, and what backlight adopted is 45mm * 80mm square array backlight that the red LED of 12V is formed by operating voltage; It is 96mm * 96mm rectangular illumination light source that the red LED of 12V is formed that lighting source adopts by operating voltage.
Above-mentioned imaging device and lighting device aim at the design of VCM magnet steel vision detection system, the measuring accuracy of tested VCM magnetic links is improved, reduce distortion; Adopt red LED to form square array backlight and rectangular illumination light source, can reduce the influence of parasitic light, reach the better illumination effect.
Graphics processing unit, the image of the tested VCM magnetic links that image pick-up card is collected carries out analyzing and processing, generates tested VCM magnetic links contour curve, and whether judge tested VCM magnetic links be specification product; In the present embodiment, graphics processing unit is based on the PC framework, and whether the software program of interior integrated image contour curve fitting algorithm reaches is the judgment processing software program of specification product;
ECU (Electrical Control Unit) links to each other with mechanical detection means with graphics processing unit, the motion of control pay-off, and according to the output result of image processing system, the motion of control sorting equipment; In the present embodiment, ECU (Electrical Control Unit) is based on the singlechip microprocessor framework, and concrete structure adopts applicant's disclosed structure in " based on the development of monolithic processor controlled VCM magnet steel automatic checkout equipment " and " design studies of the quick, intelligent visual detection equipment of VCM magnet steel ".
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920198741XU CN201522265U (en) | 2009-10-22 | 2009-10-22 | A visual inspection system for VCM magnetic steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920198741XU CN201522265U (en) | 2009-10-22 | 2009-10-22 | A visual inspection system for VCM magnetic steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201522265U true CN201522265U (en) | 2010-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920198741XU Expired - Fee Related CN201522265U (en) | 2009-10-22 | 2009-10-22 | A visual inspection system for VCM magnetic steel |
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| Country | Link |
|---|---|
| CN (1) | CN201522265U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661706A (en) * | 2012-04-28 | 2012-09-12 | 江南大学 | Machine vision-based automatic detection method for position of hard disk magnet |
| CN103148783A (en) * | 2013-03-06 | 2013-06-12 | 江南大学 | Automatic detection method for installing position of valve rocker |
| CN104384600A (en) * | 2014-11-18 | 2015-03-04 | 苏州禾盛新型材料股份有限公司 | Automatic detection and separation device for defective products in PCM production shearing process |
| CN106441132A (en) * | 2016-10-31 | 2017-02-22 | 广东工业大学 | Optical and mechanical mixed multipoint projection self-calibration aperture measuring system and method for nonstandard inner hole |
-
2009
- 2009-10-22 CN CN200920198741XU patent/CN201522265U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661706A (en) * | 2012-04-28 | 2012-09-12 | 江南大学 | Machine vision-based automatic detection method for position of hard disk magnet |
| CN103148783A (en) * | 2013-03-06 | 2013-06-12 | 江南大学 | Automatic detection method for installing position of valve rocker |
| CN103148783B (en) * | 2013-03-06 | 2016-03-02 | 江南大学 | A kind of automatic testing method of valve rocker installation site |
| CN104384600A (en) * | 2014-11-18 | 2015-03-04 | 苏州禾盛新型材料股份有限公司 | Automatic detection and separation device for defective products in PCM production shearing process |
| CN106441132A (en) * | 2016-10-31 | 2017-02-22 | 广东工业大学 | Optical and mechanical mixed multipoint projection self-calibration aperture measuring system and method for nonstandard inner hole |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20100707 Termination date: 20131022 |