CN102042988A - Detection system for defects of inclined teeth in screws and detection method thereof - Google Patents
Detection system for defects of inclined teeth in screws and detection method thereof Download PDFInfo
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- CN102042988A CN102042988A CN2010105624056A CN201010562405A CN102042988A CN 102042988 A CN102042988 A CN 102042988A CN 2010105624056 A CN2010105624056 A CN 2010105624056A CN 201010562405 A CN201010562405 A CN 201010562405A CN 102042988 A CN102042988 A CN 102042988A
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Abstract
The invention relates to a detection system for the defects of inclined teeth in screws, which comprises a supporting plate (160) for laying the screws, a lighting unit (110), a reflecting unit (120), an imaging unit (130), an image establishing module (140) and an image processing module (150), wherein the lighting unit (110) is away from one surface B1 of the supporting plate (160) for a fixed distance X1, the reflecting unit (120) comprises at least a group of reflectors which are away from the other surface B2 of the supporting plate (160) for a fixed distance X2, the imaging unit (130) is away from the surface B2 of the supporting plate (160) for a fixed distance X3 and is positioned above the reflecting unit (120), the image establishing module (140) is connected with the imaging unit (130), and the image processing module (150) is connected with the image establishing module (140). The invention also discloses a detection method for the defects of inclined teeth in screws. The detection system for the defects and the method provided by the invention can detect whether the defects of the inclined teeth occur in the inner screw teeth of the screws and can judge the severity degree of the existing defects of the inclined teeth.
Description
Technical field
The present invention relates to a kind of defect detecting system and detection method thereof, is oblique tooth defect detecting system and detection method thereof in a kind of screw specifically, belongs to the optical detection field.
Background technology
Oblique tooth defective in the screw refers to screw internal thread axle center in process and the situation of inclination occurs.As shown in Figure 1, be the diagrammatic cross-section of screw.Wherein, Fig. 1 (a) is not for there being to occur the interior tiltedly sectional view of the screw of tooth defective, at this moment, the axis OO ' of screw is vertical with horizontal direction, its internal thread 1 is A1 with the horizontal direction angle, and look this and be worth the theoretical value at the internal screw thread angle of inclination of specification screw (usually, this theoretical value replaces with a certain span) for this reason in actual mechanical process.Tiltedly during the tooth defective, see Fig. 1 (b) and 1 (c) in this specification screw exists, at this moment, the axis OO ' of screw and the angle of horizontal direction no longer are the right angles, and the internal thread 1 of screw and the angle of horizontal direction also no longer are A1.In existing tiltedly the angle of the internal thread 1 of the screw of tooth defective and horizontal direction (A2, A3) poor with the theoretical value A1 of the internal thread 1 of this specification screw and horizontal direction angle, promptly | A2-A1| and | A3-A1|, will be above a certain given threshold value.In like manner, when described difference during less than a certain given threshold value, show screw to be detected do not exist in oblique tooth defective.In addition, the order of severity of oblique tooth defective in the described screw thread also can judge that difference is big more by the size of this difference, and interior oblique tooth defective is serious more.
At present, many fields have all proposed very high requirement to the quality of securing member, for example, and the screw product of plurality of specifications in the automobile fastener industry.In manufacture process, screw can produce various defectives, for example is positioned at the scuffing of screw surface and side, the product code numbering misprint, and bigger scale error, inside and outside thread leaks attacks, and inside and outside thread is attacked tiltedly etc.Prior art has proposed many defects detection schemes and has been used for detecting above-mentioned defective.
Yet along with the requirement to the quality of securing member is more and more higher, especially the part securing member that is used to export is required full inspection, need take different quality control standards at dissimilar defectives.In this case, not only need to detect the defective that scale error is brought, but also need detect oblique tooth defective in the screw, and the order of severity of oblique tooth defective in the screw is carried out classification according to the inclined degree in detected screw axle center.
Summary of the invention
The technical problem to be solved in the present invention is: oblique tooth defect detecting system and detection method thereof in a kind of screw are provided, and it can detect screw effectively and whether have interior tiltedly tooth defective, and the order of severity of interior oblique tooth defective.
In order to solve the problems of the technologies described above, the invention provides in a kind of screw tiltedly tooth defect detecting system, it comprises the supporting plate of the transparent or semitransparent shape that is used to put screw, and
Lighting unit, surperficial B1 one fixed range X1 of its described supporting plate of distance;
Reflector element, it comprises at least one group of catoptron of another surperficial B2 one fixed range X2 of the described supporting plate of distance, described every group of catoptron is that the center symmetry is placed with position, screw axle center respectively, and when catoptron was two groups, angle was 90 degree between every group of adjacent mirror;
Image-generating unit, another surperficial B2 one fixed range X3 of the described supporting plate of its distance, and be positioned at described reflector element top, the optical axis of described image-generating unit and the axle center of screw to be detected overlap substantially;
Image construction module, it is connected with described image-generating unit;
Image processing module, it is connected with described image construction module;
Described lighting unit incides the light of described image-generating unit to the irradiation of described supporting plate and transmission by described supporting plate, and described lighting unit is to being placed on the screw irradiation to be detected on the described supporting plate and forming two dimensional image by the light that described reflector element is incided in the reflection of screw inwall on described image-generating unit;
Described two dimensional image comprises second image that the light of first image that the sensing lighting unit forms to the irradiation of described supporting plate and the transmission light by described supporting plate and the described reflector element reflection of sensing forms, above-mentioned first image and this second image occur in the width of cloth one dimension image that coexists, but it is separated on the position, described second image occurs in pairs, and it equates with the group number of catoptron in the described reflector element.
In described detection system, the optical axis of described image-generating unit is perpendicular to the surperficial B1 and the B2 of described supporting plate.
In described detection system, described supporting plate is rotating disk or belt.
In described detection system, described supporting plate and described lighting unit, reflector element and image-generating unit relatively move.
In described detection system, described lighting unit is one or more light sources.
In described detection system, described image-generating unit is taken two dimensional image in a continuous manner or is taken two dimensional image with pulse mode, and corresponding described lighting unit adopts Continuous irradiation light or pulse irradiation light.When with the pulse mode photographic images, described image-generating unit is identical with the lighting unit sequential, claps an image when promptly light source is bright.
In the oblique tooth defect detecting system, distance between the distance between described lighting unit and the supporting plate or described reflector element and the supporting plate or the distance between described image-generating unit and the supporting plate can be adjusted change in described screw.
Oblique tooth defect inspection method in a kind of screw, it may further comprise the steps:
1), start in the screw tiltedly tooth defect detecting system, lighting unit Chang Liang supplies screw G to be measured by the vibrations hopper to the B2 of supporting plate face, surveys screw G and ajusts automatically by ajusting device, makes the axis of described screw to be measured and the Surface Vertical of described supporting plate;
2), adjust the angle and the position of catoptron in the described reflector element, make each catoptron in the described reflector element all reflect the image of screw G inwall to be detected;
3), on described image-generating unit, form two dimensional image, second image 22 that forms of the light of first image 21 that forms to described supporting plate irradiation and the transmission light by described supporting plate comprising the sensing lighting unit and the described reflector element reflection of sensing;
4), by described image construction module and image processing module, obtain the image that described screw internal thread to be measured is become, and draw screw internal thread to be measured and horizontal included angle A 2, A3 by it;
5), get the absolute value difference of the theoretical value A1 of the internal thread of detected screw internal thread to be measured and horizontal included angle A 2, A3 and this specification screw and horizontal direction angle, promptly | A2-A1| or | A3-A1|, itself and preset threshold are compared, if described absolute value difference is greater than preset threshold, there is interior tiltedly tooth defective in then described screw G to be measured; If described absolute value difference is smaller or equal to preset threshold, there is not interior tiltedly tooth defective in then described screw G to be measured.
In the oblique tooth defect inspection method, described threshold value adopts following method to determine in described screw:
1), if screw G to be detected be standard component, directly use its parameter; 2), if screw G to be detected is a non-standard component, the internal thread angle of inclination of the screw of tooth defective takes multiple measurements to adopt manual type to filter out in the many pieces of nothings tiltedly, with the canonical parameter of this measured value as the internal thread angle of inclination of the type screw.
In the oblique tooth defect inspection method, in the described step 5), described absolute value difference is compared with described preset threshold, differs big more, represents that the interior oblique tooth defective of described screw to be measured is serious more in described screw.
In described screw tiltedly in the tooth defect inspection method, in described step 4), get that maximal value is the internal thread pitch angle of screw G to be detected in described internal thread and the horizontal angle.
Oblique tooth defect detecting system and detection method thereof in the screw of the present invention, whether it can exist oblique tooth defective to detect the internal screw thread of screw and judge that it is simple to operate to the order of severity of the oblique tooth defective that is occurred, and detects accurately.
Description of drawings
Fig. 1 is the diagrammatic cross-section of screw;
Fig. 2 is the structural representation of oblique tooth defect detecting system in the screw of the present invention;
Fig. 3 is the two dimensional image that image-generating unit forms in the detection system shown in Figure 2;
Fig. 4 is the synoptic diagram of the screw inwall that reflector element reflected in the detection system shown in Figure 2.
Embodiment
Below, for a more detailed description to the present invention in conjunction with the accompanying drawings with embodiment.Present embodiment only is the description to best mode for carrying out the invention, scope of the present invention is not had any restriction.
Embodiment
As shown in Figure 2, be the oblique structural representation of tooth defect detecting system in the screw of the present invention.Oblique tooth defect detecting system 100 in the described screw comprises the supporting plate 160 of the transparent or semitransparent shape that is used to put screw G, and it can be rotating disk or belt, and described defect detecting system also comprises
Lighting unit 110,160 1 surperficial B1 one fixed range X1 of its described supporting plate of distance, the distance X 1 between certain described lighting unit 110 and the supporting plate 160 can change as required.Described lighting unit 110 is used for to supporting plate 160 and the screw G irradiates light to be detected that is placed on it.Lighting unit 110 can comprise one or more light sources, so as lighting unit 110 can be on the whole planar range of transparent or semitransparent shape supporting plate 160 to transparent or semitransparent shape supporting plate 160 and the screw irradiates light to be detected that is placed on it.
Image-generating unit 130, described supporting plate 160 another the surperficial B2 one fixed range X3 (it also can change as required) of its distance, and be positioned at described reflector element 120 tops, the optical axis of described image-generating unit 130 and the axle center of screw to be detected overlap substantially.The optical axis of described image-generating unit 130 can be perpendicular to the surperficial B1 and the B2 of described supporting plate 160.Certainly, the optical axis of described image-generating unit 130 also can be not orthogonal to the surperficial B1 and the B2 of described supporting plate 160.Described image-generating unit 130 is used for forming a two dimensional image (as shown in Figure 3) by light and the lighting unit 110 that described supporting plate 160 incides image-generating unit 130 to being placed on the screw irradiation to be detected on the described supporting plate 160 and reflecting the light that incides reflector element 120 by the screw inwall to described supporting plate 160 irradiations and transmission by sensing lighting unit 110.Described image-generating unit 130 captured two dimensional images comprise second image 22 that the photo-beat of first image 21 that sensing lighting unit 110 is taken the photograph by the photo-beat of transparent or semitransparent shape supporting plate 160 to 160 irradiations of transparent or semitransparent shape supporting plate and transmission and 120 reflections of sensing reflector element is taken the photograph, wherein, above-mentioned first image 21 and this second image 22 can be formed in the same width of cloth one dimension image, but be separated on the position, and described second image 22 occurs in pairs, and it equates with the group number of catoptron in the described image-generating unit 130.So image-generating unit 130 and lighting unit 110 forms first passages and generate first image in the one dimension image, and reflector element 120, image-generating unit 130 and lighting unit 110 form second channels, and generate second image in the one dimension image.
Oblique tooth defect detecting system 100 duration of works in screw, when described supporting plate 160 is mobile along z direction (vertical paper direction), described image-generating unit 130 can adopt continuation mode to take at least one two dimensional image to described supporting plate 160 irradiations and transmission by the light of described supporting plate 160 and the light of reflector element 120 reflections by sensing lighting unit 110, and wherein said image-generating unit 130 can be made of one or more image-forming components.
Oblique tooth defect detecting system also comprises image construction module 140 that is connected with described image-generating unit 130 and the image processing module 150 that is connected with described image construction module 140 in the described screw.It can utilize software, hardware or way of hardware and software combination to realize.
Wherein, described image construction module 140 is used for utilizing respectively each two dimensional image of a captured two dimensional image of image-generating unit 130 to come (comprising first image 21 and second image 22) at least one group of image of the screw G internal thread to be detected on the described supporting plate 160 of structure, promptly utilizes first image in the captured two dimensional image of image-generating unit 130 to make up the overhead view image of the screw to be detected on the described supporting plate 160 and utilizes second image in the captured two dimensional image of image-generating unit 130 to make up the image of the inwall that is placed on the screw to be detected on the transparent or semitransparent shape supporting plate 160.And described image processing module 150 be used for to constructed first image 21 of image construction module 140 and second image 22 handle with determine to be positioned over screw to be detected on the described supporting plate 160 whether exist in oblique tooth defective, and in existing, screw to be detected during oblique tooth defective, judges its defect level.In other words, when tiltedly the difference at the internal thread angle of inclination of tooth defective was equal to or greater than maximum offset in the maximum inclination degree of the screw thread in the screw inwall that occurs in second image 22 does not have with standard, image processing module 150 detected defectives and belongs to interior oblique tooth defective.
The absolute value of the difference at the internal thread angle of inclination of the screw of oblique tooth defective in the determining of above-mentioned maximum offset can not have with standard by the maximum internal thread angle of inclination of the screw to be detected that measures.Wherein, the oblique internal thread angle of inclination coping screw model of the screw of tooth defective and different in standard does not have is generally fixed value, also can obtain reliable span as detection reference by repetition test.When screw internal thread to be detected angle of inclination surpasses a certain threshold value with the absolute value of the difference of the corresponding detection reference value of this model screw, judge that there is interior tiltedly tooth defective in this screw.The internal thread angle of inclination of screw to be detected is from by obtaining constructed second image 22 of image construction module 140, wherein, second image 22 comprises the subimage that equates with number of mirrors in the reflector element that reacts screw internal thread inclination situation to be detected, and maximum offset is that the maximal value and the standard at the internal thread angle of inclination in all above-mentioned subimages do not have the interior tiltedly absolute value of the difference at the internal thread angle of inclination of the screw of tooth defective.
And learn by test, take two channel image owing to use an image-generating unit, and the second captured image of described image-generating unit comprises at least one group of subimage, therefore, cost has obtained reduction, and owing to use an image-generating unit to take two channel image, so the problem that the screw internal thread angle of inclination that is caused by screw putting position difference can't correct measurement has also obtained solution.
Oblique tooth defect inspection method in a kind of screw, it may further comprise the steps:
1), starts oblique tooth defect detecting system 100 in the screw, lighting unit 110 Chang Liang, supply screw G to be measured by the vibrations hopper to the B2 of supporting plate 160 face, survey screw G and ajust automatically, make the axis of described screw to be measured and the Surface Vertical of described supporting plate 160 by ajusting device;
2), adjust the angle and the position of catoptron in the described reflector element 120, make each catoptron in the described reflector element 120 all reflect the image of screw G inwall to be detected;
3), on described image-generating unit 130, form two dimensional image, second image 22 that forms of the light of first image 21 that forms to described supporting plate 160 irradiations and the transmission light by described supporting plate 160 comprising sensing lighting unit 110 and the described reflector element reflection of sensing;
4), by described image construction module 140 and image processing module 150, obtain the image that described screw internal thread to be measured is become, and draw screw internal thread to be measured and horizontal included angle A 2, A3 by it;
5), get the absolute value difference of the theoretical value A1 of the internal thread of detected screw internal thread to be measured and horizontal included angle A 2, A3 and this specification screw and horizontal direction angle, promptly | A2-A1| or | A3-A1|, itself and preset threshold are compared, if described absolute value difference is greater than preset threshold, there is interior tiltedly tooth defective in then described screw G to be measured; If described absolute value difference is smaller or equal to preset threshold, there is not interior tiltedly tooth defective in then described screw G to be measured.
In the oblique tooth defect inspection method, described threshold value adopts following method to determine in described screw:
1), if screw G to be detected be standard component, directly use its parameter; 2), if screw G to be detected is a non-standard component, the internal thread angle of inclination of the screw of tooth defective takes multiple measurements to adopt manual type to filter out in the many pieces of nothings tiltedly, with the canonical parameter of this measured value as the internal thread angle of inclination of the type screw.
Preferably, in the oblique tooth defect inspection method, in the described step 5), described absolute value difference is compared with described preset threshold, differs big more, represents that the interior oblique tooth defective of described screw to be measured is serious more in described screw.
Preferably, in described screw tiltedly in the tooth defect inspection method, in described step 4), get that maximal value is the internal thread pitch angle of screw G to be detected in described internal thread and the horizontal angle.
As shown in Figure 4, wherein Fig. 4 (a) is when the oblique tooth defective of screw does not exist, the described image that reflector element 120 is that comprises at least one group of catoptron.Wherein, horizontal linear L2 is by the screw geometric center, and some O intersects at a T with the outermost layer screw thread of screw in the image (being the screw thread of close reflector element of vertical direction).L1 for by the some T and with the tangent straight line of screw outermost layer screw thread.L3 is for passing through screw geometric center O and the perpendicular straight line of L3, and straight line L2 and L3 angle value B1 are defined herein as the pitch angle of this screw internal thread.
Because in the captured two dimensional image that different screw was of image-generating unit, the geometric center of screw to be measured appears at the position basic identical (guaranteeing precision by mechanical part) in the image, so, tiltedly during the tooth defective, measured screw internal thread angle of inclination value is not basic identical in screw to be measured does not exist.
In like manner, in screw to be measured exists during oblique tooth defective, shown in Fig. 4 (b) and Fig. 4 (c), the angle value of straight line L2 and L3, B2 and B3, will with do not exist in tiltedly the screw angle value B1 of tooth defective differ bigger, promptly | B2-B1| and | B3-B1| will be above a certain given threshold value.
Though the image of each screw of taking cannot guarantee its geometric center and be positioned at a certain fixed position (can guarantee that its error is in certain allowed band by Machine Design), but because screw is put on described transparent or semitransparent supporting plate at random, measured screw internal thread 1 angle of inclination of single mirror may not be the maximum inclination angle of this screw internal thread 1, promptly can't go out the inclination situation of threaded spindle accurately from the image measurement this catoptron this moment.Therefore, the present invention uses at least one group of catoptron to take a plurality of channel image, closely gets rid of because screw is put the situation about can't accurately measure that is caused at random.Also the maximal value of internal thread 1 vergence direction that the four measuring passage in two groups of catoptrons can be measured respectively closely improves and detects accuracy rate as internal thread 1 angle of inclination of screw to be detected.
Certainly, in described sunken detection system, can also do further improvement, supporting plate 160 can relatively move with described lighting unit 110, reflector element 120 and image-generating unit 130 as described, promptly when described lighting unit, reflector element and image-generating unit fixedly the time, described supporting plate can move, and perhaps when described supporting plate fixedly the time, described lighting unit, reflector element and image-generating unit can move.
And described image-generating unit 130 is also taken two dimensional image in a continuous manner or take two dimensional image, the employing Continuous irradiation light of described lighting unit 110 correspondences or pulse mode irradiates light with pulse mode.When described lighting unit 110 during with the pulse mode photographic images, image-generating unit 130 is identical with the lighting unit sequential, claps an image when promptly light source is bright.Such as, oblique tooth defect detecting system 100 duration of works in described screw, described lighting unit 110 is with the pulse mode irradiates light, each pulse (T1, T2, T3 ..., Tn) shine once light to described supporting plate 160, the lasting duration of irradiation is a pulse width.Corresponding described image-generating unit 130 is identical with the sequential of lighting unit, image of bat when lighting unit 110 is bright.
It will be appreciated by those skilled in the art that the above embodiment of the present invention can make various modification and change under the situation that does not depart from invention essence, and these modification and changing should fall within the scope of protection of the present invention all.
Claims (10)
1. oblique tooth defect detecting system in the screw comprises the supporting plate (160) of the transparent or semitransparent shape that is used to put screw, and it is characterized in that: described detection system also comprises
Lighting unit (110), (160) surperficial B1 one fixed range X1 of its described supporting plate of distance;
Reflector element (120), it comprises at least one group of catoptron of another surperficial B2 one fixed range X2 of distance described supporting plate (160), described every group of catoptron is that the center symmetry is placed with position, screw axle center respectively, and when catoptron was two groups, angle was 90 degree between every group of adjacent mirror;
Image-generating unit (130), another surperficial B2 one fixed range X3 of its distance described supporting plate (160), and be positioned at described reflector element (120) top, the optical axis of described image-generating unit (130) and the axle center of screw to be detected overlap substantially;
Image construction module (140), it is connected with described image-generating unit (130);
Image processing module (150), it is connected with described image construction module (140);
Described lighting unit (110) incides the light of described image-generating unit (130) to described supporting plate (160) irradiation and transmission by described supporting plate (160), and described lighting unit (110) is gone up the formation two dimensional image to the light that is placed on the screw irradiation to be detected on the described supporting plate (160) and incides described reflector element (120) by the reflection of screw inwall at described image-generating unit (130);
Described two dimensional image comprises second image that the light of first image that sensing lighting unit (110) forms to described supporting plate (160) irradiation and the transmission light by described supporting plate (160) and the described reflector element of sensing (120) reflection forms, above-mentioned first image and this second image occur in the width of cloth one dimension image that coexists, but it is separated on the position, described second image occurs in pairs, and it equates with the group number of catoptron in the described reflector element (120).
2. detection system according to claim 1 is characterized in that: the optical axis of described image-generating unit (130) is perpendicular to the surperficial B1 and the B2 of described supporting plate (160).
3. detection system according to claim 1 and 2 is characterized in that: described supporting plate (160) is rotating disk or belt.
4. detection system according to claim 1 and 2 is characterized in that: described supporting plate (160) can relatively move with described lighting unit (110), reflector element (120) and image-generating unit (130).
5. detection system according to claim 1 and 2 is characterized in that: described lighting unit (110) is one or more light sources.
6. detection system according to claim 1 and 2, it is characterized in that: described image-generating unit (130) is taken two dimensional image in a continuous manner or is taken two dimensional image with pulse mode, and corresponding described lighting unit (110) adopts Continuous irradiation light or pulse irradiation light.
7. oblique tooth defect inspection method in the screw, it is characterized in that: it may further comprise the steps:
1), starts oblique tooth defect detecting system in the screw, lighting unit (110) Chang Liang, supply screw G to be measured by the vibrations hopper to the B2 face of supporting plate (160), survey screw G and ajust automatically, make the axis of described screw to be measured and the Surface Vertical of described supporting plate (160) by ajusting device;
2), adjust the angle and the position of catoptron in the described reflector element (120), make each catoptron in the described reflector element (120) all reflect the image of screw G inwall to be detected;
3), go up to form two dimensional image, second image 22 that forms of the light of first image 21 that forms to described supporting plate (160) irradiation and the transmission light by described supporting plate (160) comprising sensing lighting unit (110) and the described reflector element of sensing (120) reflection at described image-generating unit (130);
4), by described image construction module (140) and image processing module (150), obtain the image that described screw internal thread to be measured is become, and draw screw internal thread to be measured and horizontal angle (A2, A3) by it;
5), get the absolute value difference of the theoretical value A1 of the internal thread of detected screw internal thread to be measured and horizontal angle (A2, A3) and this specification screw and horizontal direction angle, promptly | A2-A1| or | A3-A1|, itself and preset threshold are compared, if described absolute value difference is greater than preset threshold, there is interior tiltedly tooth defective in then described screw G to be measured; If described absolute value difference is smaller or equal to preset threshold, there is not interior tiltedly tooth defective in then described screw G to be measured.
8. oblique tooth defect inspection method in the screw according to claim 7, it is characterized in that: described threshold value adopts following method to determine:
1), if screw G to be detected be standard component, directly use its parameter; 2), if screw G to be detected is a non-standard component, the internal thread angle of inclination of the screw of tooth defective takes multiple measurements to adopt manual type to filter out in the many pieces of nothings tiltedly, with the canonical parameter of this measured value as the internal thread angle of inclination of the type screw.
9. oblique tooth defect inspection method in the screw according to claim 8, it is characterized in that: in the described step 5), described absolute value difference is compared with described preset threshold, differs big more, represents that the interior oblique tooth defective of described screw to be measured is serious more.
10. oblique tooth defect inspection method according to Claim 8 or in the 9 described screws is characterized in that: in described step 4), get that maximal value is the internal thread pitch angle of screw G to be detected in described internal thread and the horizontal angle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105624056A CN102042988A (en) | 2010-11-25 | 2010-11-25 | Detection system for defects of inclined teeth in screws and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105624056A CN102042988A (en) | 2010-11-25 | 2010-11-25 | Detection system for defects of inclined teeth in screws and detection method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107121438A (en) * | 2016-02-24 | 2017-09-01 | 丰田合成株式会社 | Check device and inspection method |
| CN109341570A (en) * | 2018-09-19 | 2019-02-15 | 中船重工鹏力（南京）智能装备系统有限公司 | A kind of internal screw thread detection method and system based on machine vision |
| CN109719044A (en) * | 2017-10-30 | 2019-05-07 | 昆山全盈自动化设备有限公司 | Detection device, screening machine and detection method |
| CN111351797A (en) * | 2018-12-21 | 2020-06-30 | 由田新技股份有限公司 | Single-side and double-side detection system and paired reflector set device |
| CN112129782A (en) * | 2020-09-09 | 2020-12-25 | 武汉精测电子集团股份有限公司 | Method and device for detecting foreign matter layering of display panel |
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2010
- 2010-11-25 CN CN2010105624056A patent/CN102042988A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121438A (en) * | 2016-02-24 | 2017-09-01 | 丰田合成株式会社 | Check device and inspection method |
| CN107121438B (en) * | 2016-02-24 | 2020-07-14 | 丰田合成株式会社 | Inspection apparatus and inspection method |
| CN109719044A (en) * | 2017-10-30 | 2019-05-07 | 昆山全盈自动化设备有限公司 | Detection device, screening machine and detection method |
| CN109341570A (en) * | 2018-09-19 | 2019-02-15 | 中船重工鹏力（南京）智能装备系统有限公司 | A kind of internal screw thread detection method and system based on machine vision |
| CN109341570B (en) * | 2018-09-19 | 2020-09-08 | 中船重工鹏力（南京）智能装备系统有限公司 | Machine vision-based internal thread detection method and system |
| CN111351797A (en) * | 2018-12-21 | 2020-06-30 | 由田新技股份有限公司 | Single-side and double-side detection system and paired reflector set device |
| CN112129782A (en) * | 2020-09-09 | 2020-12-25 | 武汉精测电子集团股份有限公司 | Method and device for detecting foreign matter layering of display panel |
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Application publication date: 20110504 |