CN102305796A - Adjustable uniformly-imaged light source device for magnetic shoe detection - Google Patents
Adjustable uniformly-imaged light source device for magnetic shoe detection Download PDFInfo
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- CN102305796A CN102305796A CN201110251447A CN201110251447A CN102305796A CN 102305796 A CN102305796 A CN 102305796A CN 201110251447 A CN201110251447 A CN 201110251447A CN 201110251447 A CN201110251447 A CN 201110251447A CN 102305796 A CN102305796 A CN 102305796A
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Abstract
The invention discloses an adjustable uniformly-imaged light source device for magnetic shoe detection. The adjustable uniformly-imaged light source device comprises a semispherical shell of which the top is provided with a hole, a bottom plate connected with the bottom of the semispherical shell and an arc-shaped light source group which is arranged on the bottom plate and is distributed on the inner side of the bottom of the semispherical shell, wherein a thread sheath is arranged at the hole formed on the top of the semispherical shell; a light shading plate which can move up and down relative to the thread sheath is arranged on the thread sheath in the semispherical shell; and a high-reflecting rate diffuse reflection reflective material is sprayed to the inner surface of the semispherical shell uniformly. In the adjustable uniformly-imaged light source device, the position of the light shading plate can be adjusted manually to control the luminance of a chamfering surface and an arc-shaped plane of the end face of a magnetic shoe, so clear and stable images can be obtained by one-time imaging, the processing capacity of image data is reduced, and the real-time online processing speed is improved. By the light source device, the technical problem which is difficult to solve in the conventional light source on the market is solved, and the production cost is low, so the adjustable uniformly-imaged light source device has popularization value and a certain economy in similar application occasions.
Description
Technical field
The present invention relates to the mechanical engineering lighting technical field, particularly a kind of adjustable even imaging source device that is used for the magnetic shoe detection.
Background technology
Magnetic shoe is a kind of ferrite watt shape permanent magnetic material, mainly is used on the magneto, and its effect is to replace field copper to produce magnetic field.Since have simple in structure, volume is little, copper loss is low, energy consumption is little and use advantages such as reliable, magneto is widely used in fields such as automobile, electric tool, electronic toy, household electrical appliances, office equipment and computing machines, this makes that also the magnetic shoe demand is huge.At present, China is that maximum permanent-magnet ferrite material is produced country.
Magnetic shoe is the critical component of magneto, and the quality of its quality has very big influence to the performance of magneto.In exported product, even have and cause the risk of returning goods by the gross because of indivedual magnetic shoes are defective.Therefore sorting out defective magnetic shoe has very important significance.
Magneto magnetic shoe production technology can reduce: the preparation of pre-burning material, powder process, moulding, sintering, mill are processed, inspection grades several steps, and several factors all can cause magnetic shoe defective to occur.In molding procedure, because magnetic shoe is an arc, magnetic field distribution is inhomogeneous in the magnetic shoe die cavity, and the inhomogeneous magnetic density unevenness that causes of magnetic filling is even, all can make magnetic shoe produce internal stress; In sintering process,, its internal stress is further superposeed and the formation crackle again because of shrinkage anisotropy.Magnetic shoe is the bigger hard brittle material of the higher fragility of hardness, in grinding process, because extruding and stress relief also can cause collapsing defectives such as piece, arrisdefect, eccentric wear also can occur to owe defectives such as mill; In each produces course of conveying because collision, impact, defective such as vibrations and extruding also can cause further bursting apart.
Because magnetic shoe kind specification is various; Shape difference is very big; Detection faces is many; Output is very high; Productive temp is very fast, can reach 120 in 1 minute, and the own defect kind of magnetic shoe (comprise crackle, collapse mashed, chamfering, owe mill, play level, interlayer and spot etc.) is a lot of in addition; Cause the online automatic detection method of magnetic shoe is not all obtained substantial progress up to now, magnetic shoe manufacturer all still is to be main with the artificial visual detection all the time.This detection method is because fatigue resistance is big, the human eye easy fatigue, and its low precision, efficient are low, flase drop and loss are higher, and it is bigger that quality control receives artificial factor, and unstable; Simultaneously, because the magnetic shoe out-of-shape, size is more, is difficult to carry out size detection with manual work, can not reject out-of-size magnetic shoe, can not carry out grading and classification to improve productivity effect to magnetic shoe.Therefore; The product that belongs to single-piece small profits, production in enormous quantities for this production characteristic of magnetic shoe; An urgent demand is developed fast, economic, harmless, the comprehensive real-time online detection of non-sampling sorting equipment, to reach online high speed detection, realizes that automatic go-no-go is to guarantee all-round excellent product.
Mechanical vision inspection technology is a kind of like this advanced person's detection technique just.Along with constantly improving and development of infotecies such as computer vision, Digital Image Processing, Machine Vision Detection has become the main method that industrial automation detects.It has fast, accurately, outstanding advantage such as reliable and noncontact, to the security of the consistance that improves the examination and test of products, production, reduce labor strength and the High-efficient Production that realizes enterprise is had vital role.
In the Machine Vision Detection system, light source and illumination are present machine vision applications system key of success, and good light illumination should have following characteristic:
1, outstanding as far as possible clarification of objective produces significantly difference as far as possible between part that object need detect and non-test section, increase contrast;
2, guarantee enough brightness and stability;
3, the variation of object space should not influence the quality of imaging.Because led light source has that colour rendering is good, luminous intensity is high, decay is little and the life-span such as grows at advantage, has obtained application more and more widely in field of machine vision.
In general, a cover vision system aims at certain type product design, all has specificity at aspects such as light source configuration, algorithm design and mechanism design, and is not suitable for a cover machine detection multiple product.Magnetic shoe specification kind is a lot, and a producer just possibly produce 100 kinds, and magnetic shoe physical dimension alters a great deal.For preventing that magnetic shoe from use occurring collapsing the problem that the piece arrisdefect damages magneto, the magnetic shoe seamed edge all needs chamfering.The magnetic shoe end face just is made up of a big arc-plane and several fillet surfaces.Because the existence of fillet surface; Fillet surface is different to same illumination reflection of light angle with arc-plane; The light intensity that makes fillet surface two imaging regions corresponding with the plane reflex to camera lens is different; Cause these two imaging region brightness inconsistent; A regional luminance is suitable; Another then too dark or too bright (promptly reflective) can't carry out image recognition.
Want to reduce cost, improve real-time online inspection speed, the preferably Polaroid image that obtains magnetic shoe fillet surface and arc-plane.Through a large amount of experiments, find to be difficult to utilize ready-made light source to reach satisfied effect.Such as utilizing 4 area sources from 4 directional lightings; And the irradiating angle of each piece light source adjusted; The magnetic shoe less to radian; Also can reach satisfied effect; But owing to need adjust to the irradiating angle of each piece light source; Need the computer-controlled adjusting mechanism of a cover, complex structure; The magnetic shoe specification is numerous in addition, and magnetic shoe is to produce in batches by requirements of ordering goods, to the magnetic shoe of each specification, and the required adjustment angle difference of light source, the technician is difficult at short notice that field adjustable obtains the required full illumination angle of light source, and it is bigger to control difficulty; For the bigger magnetic shoe of radian, because light source and shadow surface change of distance are bigger, it is reflective to tend to the part to occur, is difficult to the effect that reaches satisfied.
Utilize the light emitting diode low angle annular light source of dark field mode illumination to be provided for permanent magnet workpiece; The profile that is embedded in the permanent magnet in the groove is well reflected; Pinprick and veining defect are also preferably shown especially out, and dust granule minimum on its smooth surface has all been manifested to come out.But in the method, it has considered the arc-plane illumination and the imaging of permanent magnet workpiece.Find through experiment; In this lighting system; Basically can obtain effect preferably through the adjustment irradiating angle for a single plane in workpiece fillet surface and the arc-plane; Then be difficult to reach simultaneously effect preferably for fillet surface and plane; And for the bigger magnetic shoe of radian; Local reflective problem often also can occur, be difficult to adjustment; Simultaneously, owing to used mould, mould blocks light, makes this lighting system can not obtain the image of fillet surface.As detecting the defect situation of fillet surface, must increase station in addition, increase cost, reduce the real-time online detection speed; If adopt this mode that the numerous magnetic shoe of specification is carried out online detection, the kind of mould and quantity are inevitable numerous, and the workload of adjustment mounting production line can be very greatly, and cost is also higher.
And steady for guaranteeing delivery safety, magnetic shoe is to crouch to be placed on conveying belt middle (a lot of elongated magnetic shoes are difficult to stand up).Detect for end face, because the magnetic shoe size has nothing in common with each other, the magnetic shoe end face just is in the diverse location on the conveying belt.Like this, annular light source just can only be vertically mounted on outside the conveying belt end face, produces different intervals with the magnetic shoe end face.Because light decay, this annular light source end face of distance magnetic shoe far away then is difficult to illuminate.Detect operation if increase by 2, forming images separately in fillet surface and plane, should increase cost, also will reduce real-time processing speed, are difficult to satisfy real-time online and detect requirement.Therefore, be necessary to design a kind of new reasonable light source illuminating apparatus, solve the Polaroid problem of magnetic shoe end face.
Summary of the invention
Goal of the invention of the present invention is; Problem to above-mentioned existence; A kind of magnetic shoe Polaroid reliable graph picture that just can obtain magnetic shoe fillet surface and arc-plane in camera that makes is provided; To improve real-time online inspection speed, the adjustable even imaging source device that is used for the magnetic shoe detection that reduces cost.
Technical scheme of the present invention is achieved in that a kind of adjustable even imaging source device that magnetic shoe detects that is used for; It is characterized in that: comprise that the top offers porose dome-type shell; The base plate that is connected with the dome-type outer casing bottom and being arranged on the base plate; Be distributed in the inboard arc light sources of dome-type outer casing bottom; Place, aperture in that said dome-type cover top portion is offered is provided with swivel nut; On said swivel nut; Be provided with the shadow shield that swivel nut relatively moves up and down in the dome-type shell, uniformly sprayed high reflecting rate diffuse reflection reflectorized material at said dome-type inner surface of outer cover.
The adjustable even imaging source device that is used for the magnetic shoe detection of the present invention, its said dome-type shell is provided with a breach that enables the transport tape mounted on surface along axis.
Of the present inventionly be used for the adjustable even imaging source device that magnetic shoe detects, its said swivel nut and shadow shield are through being threaded.
The adjustable even imaging source device that is used for the magnetic shoe detection of the present invention, the shadow shield position-adjustable in its said dome-type shell is carved with the scale of indicating the shadow shield adjusting position on said swivel nut.
Of the present inventionly be used for the adjustable even imaging source device that magnetic shoe detects, its on said base plate, arc light sources inboard is provided with and is used to prevent that light that light source sends from directly getting into the shade of camera lens.
The adjustable even imaging source device that is used for the magnetic shoe detection of the present invention, its said arc light sources is made up of some led light sources separate, that be evenly distributed on said dome-type outer casing bottom inboard.
Of the present inventionly be used for the adjustable even imaging source device that magnetic shoe detects, its said base plate be provided with can slippage on the light source mounting guide rail be slidingly installed hole and latch mechanism.
The present invention can be through the manual adjustments shadow shield the position, the illumination of control magnetic shoe end face fillet surface and arc-plane Polaroidly can obtain steady and audible image, has reduced the view data treatment capacity, has improved the real-time online processing speed.This light supply apparatus has solved the insoluble technical matters of ready-made on the market light source, and production cost is lower, has promotional value in similar application scenario, has certain economic property.
Description of drawings
Fig. 1 is a kind of structural representation of magnetic shoe end face.
Fig. 2 is the structural representation of the embodiment of the invention 1.
Fig. 3 is the work synoptic diagram of the embodiment of the invention 1.
Fig. 4 is the structural representation of the embodiment of the invention 2.
Mark among the figure: 1 is swivel nut, and 2 is shadow shield, and 3 is the dome-type shell, and 4 is shade, and 5 is led light source, and 6 is base plate, and 7 is breach, and 8 is magnetic shoe, and 9 is transport tape.
Embodiment
Below in conjunction with accompanying drawing, the present invention is done detailed explanation.
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Embodiment 1: shown in Fig. 2 and 3; A kind of adjustable even imaging source device that is used for the magnetic shoe detection; Comprise that the top offers porose dome-type shell 3, the base plate 6 that is connected with dome-type shell 3 bottoms and be arranged on the base plate 6, be distributed in the arc light sources of dome-type shell 3 bottom inside, camera is taken pictures to the magnetic shoe on the transport tape 98 through the hole of dome-type cover top portion; Said dome-type shell 3 forms breach 7 along an axis excision part; Said breach can make it the transport tape mounted on surface; And guarantee magnetic shoe within sweep of the eye at camera; Said base plate 6 be provided with can slippage on the light source mounting guide rail be slidingly installed hole and latch mechanism; The whole light source device can slippage on the light source mounting guide rail; Make the light source end face all the time near the magnetic shoe end face; Avoid having different distance to cause light decay, avoid from the light source not enough problem of magnetic shoe end face brightness far away because of the magnetic shoe end face and the light source of different size.
Uniformly sprayed high reflecting rate diffuse reflection reflectorized material at said dome-type shell 3 inside surfaces; To evenly reflect from the light that dome-type inner surface of outer cover bottom arc light sources is sent; Can form the uniform circular arc of an illumination field of illumination; Can overcome radian like this and cause local reflective problems because of distance is different owing to leaving planar light source or annular light source, make the variation of image quality object space insensitive with all very big magnetic shoe of size.
Wherein said arc light sources is by some separate; The led light source 5 that is evenly distributed on said dome-type shell 3 bottom inside is formed; On said base plate 6; Arc light sources inboard is provided with and is used to prevent that light that light source sends from directly getting into the shade 4 of camera lens; Power output end is connected with led light source; Can control the brightness of led light source through the size of control electric power outputting current; To obtain the suitable image of brightness; Said led light source can also be distinguished separately and is connected with computer control system; The break-make of computer control system control respective electronic switch is controlled the light on and off of each led light source, to satisfy different lighting demands.
Arc light sources radian and size and shell adapt.The arc light source adopts the LED lamp, can select same package for use and the different LED lamp of color as required; Circuit board is an aluminium base.According to the piece test needs, the LED lamp can be controlled its light on and off separately, also can wholely control its light on and off; Because magnetic shoe grey darkly, absorptive is stronger, for avoiding occurring motion blur, and is thought of as light decay and reserves certain nargin, need rationally select the LED lamp of high brightness for use.In the present invention,, calculated the camera maximum exposure time, and combining camera sensitivity and other condition the brightness and the power of required LED lamp have been calculated according to the real-time online detection case; The LED lamp can not bear too high temperature, must take into full account heat radiation.Because light source power is bigger, heat radiation has certain difficulty, has therefore adopted to help the material and the Technology for Heating Processing of dispelling the heat, and has adopted the stroboscopic illumination mode, reliably solves heat dissipation problem and prolongs light source life.
The place, aperture that offers at said dome-type shell 3 tops is provided with swivel nut 1; On said swivel nut 1, in the dome-type shell 3, be provided with the shadow shield 2 that swivel nut 1 relatively moves up and down; Said swivel nut 1 is threaded with shadow shield 2; On swivel nut, be carved with scale and can indicate the position of shadow shield, shadow shield can be through lock-screw locking after rotating to correct position.Can know that from principle of reflection the light on irradiation magnetic shoe plane, light shell outer cover inside surface top has more light to get into camera lens after reflection, the light of light shell outer cover inside surface irradiated magnetic shoe fillet surface has less relatively light could get into camera lens after reflection.This shadow shield can block absorption with the light of the irradiation magnetic shoe end face from light shell outer cover inside surface top, and to reduce the illumination of the irradiation magnetic shoe end face from top, shadow shield is not controlled the reflected light below the shadow shield.So just through reducing the intensity of illumination on the magnetic shoe end face plane; The incident intensity ratio on control magnetic shoe end face fillet surface and plane; Make the basic uniformity of light intensity that reflexes on the magnetic shoe different surfaces in the camera lens, make magnetic shoe fillet surface and plane form the image of uniformity.
In order to control the incident intensity ratio on magnetic shoe end face fillet surface and plane, need accurately control shadow shield position.Magnetic shoe to each batch magnetic shoe or each specification; Can be through exemplar be taken pictures; Process eye-observation or Flame Image Process are judged the consistance of the brightness in magnetic shoe end face fillet surface and planar imaging zone, and then shadow shield is adjusted to suitable position, make the magnetic shoe end view drawing as uniformity.Can write down the position of scale indication, be provided with directly adjustment use of back.Like this, the adjustment of light source is simple and convenient, and reliability is high.According to the needs of use occasion, through the adjustment baffle position, and the kind of changing shadow shield, the light illumination mode can be switched between bright field illumination mode and dark field illumination mode, to satisfy different use occasions.
Embodiment 2: as shown in Figure 4, compare with embodiment 1, just the dome-type shell does not excise a part, and light source is thrown light on to a border circular areas, and this situation is suitable for light source can accessible situation near illuminated objects.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. one kind is used for the adjustable even imaging source device that magnetic shoe detects; It is characterized in that: comprise that the top offers porose dome-type shell (3); The base plate (6) that is connected with dome-type shell (3) bottom and being arranged on the base plate (6); Be distributed in the arc light sources of dome-type shell (3) bottom inside; The place, aperture that offers at said dome-type shell (3) top is provided with swivel nut (1); On said swivel nut (1); Be provided with the shadow shield (2) that swivel nut (1) relatively moves up and down in the dome-type shell (3), uniformly sprayed high reflecting rate diffuse reflection reflectorized material at said dome-type shell (3) inside surface.
2. the adjustable even imaging source device that is used for the magnetic shoe detection according to claim 1, it is characterized in that: said dome-type shell (3) is provided with a breach (7) that enables the transport tape mounted on surface along axis.
3. according to claim 1ly be used for the adjustable even imaging source device that magnetic shoe detects, it is characterized in that: said swivel nut (1) and shadow shield (2) are through being threaded.
4. the adjustable even imaging source device that is used for the magnetic shoe detection according to claim 3; It is characterized in that: shadow shield (2) position-adjustable in the said dome-type shell (3), be carved with the scale of indicating shadow shield (2) adjusting position on said swivel nut (1).
5. according to claim 1ly be used for the adjustable even imaging source device that magnetic shoe detects, it is characterized in that: go up at said base plate (6), arc light sources inboard is provided with and is used to prevent that light that light source sends from directly getting into the shade (4) of camera lens.
6. according to any described adjustable even imaging source device that is used for the magnetic shoe detection in the claim 1 to 5, it is characterized in that: said arc light sources is made up of some led light sources (5) separate, that be evenly distributed on said dome-type shell (3) bottom inside.
7. according to claim 6ly be used for the adjustable even imaging source device that magnetic shoe detects, it is characterized in that: said base plate (6) be provided with can slippage on the light source mounting guide rail be slidingly installed hole and latch mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110251447 CN102305796B (en) | 2011-08-30 | 2011-08-30 | Adjustable uniformly-imaged light source device for magnetic shoe detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110251447 CN102305796B (en) | 2011-08-30 | 2011-08-30 | Adjustable uniformly-imaged light source device for magnetic shoe detection |
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| CN102305796A true CN102305796A (en) | 2012-01-04 |
| CN102305796B CN102305796B (en) | 2013-05-08 |
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| CN 201110251447 Expired - Fee Related CN102305796B (en) | 2011-08-30 | 2011-08-30 | Adjustable uniformly-imaged light source device for magnetic shoe detection |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743753A (en) * | 2014-01-23 | 2014-04-23 | 四川大学 | Flexible magnetic shoe imaging device |
| CN103743759A (en) * | 2014-01-23 | 2014-04-23 | 四川大学 | Uniform magnetic shoe imaging device |
| CN103743752A (en) * | 2014-01-23 | 2014-04-23 | 四川大学 | Online detecting equipment for magnetic shoes based on machine vision |
| CN107787177A (en) * | 2016-08-24 | 2018-03-09 | 深圳市祈飞科技有限公司 | Optical imaging system for electronic component pin positioning |
| CN108760627A (en) * | 2018-03-12 | 2018-11-06 | 北京林业大学 | A kind of light supply apparatus for defects detection |
| CN109374647A (en) * | 2018-10-17 | 2019-02-22 | 基准精密工业（惠州）有限公司 | Detection device |
| CN110286129A (en) * | 2019-07-12 | 2019-09-27 | 创新奇智(广州)科技有限公司 | Lighting device for magnetic shoe detection and the detection system for magnetic shoe detection |
| CN110909624A (en) * | 2019-11-01 | 2020-03-24 | 上海安威士科技股份有限公司 | Iris identification method and device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743753A (en) * | 2014-01-23 | 2014-04-23 | 四川大学 | Flexible magnetic shoe imaging device |
| CN103743759A (en) * | 2014-01-23 | 2014-04-23 | 四川大学 | Uniform magnetic shoe imaging device |
| CN103743752A (en) * | 2014-01-23 | 2014-04-23 | 四川大学 | Online detecting equipment for magnetic shoes based on machine vision |
| CN103743752B (en) * | 2014-01-23 | 2016-02-10 | 四川大学 | A kind of magnetic shoe online detection instrument based on machine vision |
| CN103743753B (en) * | 2014-01-23 | 2016-03-30 | 四川大学 | A kind of magnetic shoe flexible imaging device |
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| CN108760627A (en) * | 2018-03-12 | 2018-11-06 | 北京林业大学 | A kind of light supply apparatus for defects detection |
| CN108760627B (en) * | 2018-03-12 | 2023-12-15 | 北京林业大学 | Light source device for defect detection |
| CN109374647A (en) * | 2018-10-17 | 2019-02-22 | 基准精密工业（惠州）有限公司 | Detection device |
| CN110286129A (en) * | 2019-07-12 | 2019-09-27 | 创新奇智(广州)科技有限公司 | Lighting device for magnetic shoe detection and the detection system for magnetic shoe detection |
| CN110909624A (en) * | 2019-11-01 | 2020-03-24 | 上海安威士科技股份有限公司 | Iris identification method and device |
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