CN106645151B - Gluing detection device for screws - Google Patents
Gluing detection device for screws Download PDFInfo
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- CN106645151B CN106645151B CN201611123171.9A CN201611123171A CN106645151B CN 106645151 B CN106645151 B CN 106645151B CN 201611123171 A CN201611123171 A CN 201611123171A CN 106645151 B CN106645151 B CN 106645151B
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- 238000001514 detection method Methods 0.000 title claims abstract description 100
- 238000004026 adhesive bonding Methods 0.000 title abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 60
- 239000003292 glue Substances 0.000 claims abstract description 59
- 238000010073 coating (rubber) Methods 0.000 claims abstract description 10
- 238000003892 spreading Methods 0.000 claims description 12
- 230000007480 spreading Effects 0.000 claims description 12
- 238000005282 brightening Methods 0.000 claims description 10
- 230000007723 transport mechanism Effects 0.000 claims description 6
- 238000005286 illumination Methods 0.000 claims description 4
- 238000007598 dipping method Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/8411—Application to online plant, process monitoring
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention relates to a gluing detection device for screws. The utility model provides a rubber coating detection device of screw, including looking aside image acquisition mechanism and overlook image acquisition mechanism, the screw is arranged on the conveying platform, the conveying platform can drive the screw along the conveying route that sets for and remove, looking aside image acquisition mechanism includes first light source and first camera, overlook image acquisition mechanism includes second light source and second camera, when conveying mechanism sends the screw into looking aside the detection area, the screw rotates around self axis, first light source can illuminate the screw, first camera can shoot many times and obtain the side image of screw rotation a week; when the screw is conveyed into the overlooking detection area by the conveying mechanism, the screw can be illuminated by the second light source, and the second camera can shoot and obtain an image of the overlooking direction of the screw. The invention effectively replaces manual detection, and has the advantages of high speed, high efficiency and stable work; the glue coating detection device has accurate detection results of glue height, head material dipping and seat surface glue shortage of the screw 100, and no omission.
Description
Technical Field
The invention belongs to the field of visual detection, and particularly relates to a gluing detection device for screws.
Background
In the industry of screws, it is necessary to detect the glue application of the screws. The screws are various in types and different in colors, the gluing condition is very complex, and particularly the dark color screws coated with dark color glue are difficult to detect. And the screw gluing yield is very high, and the on-line detection speed is required to be very fast.
At present, screw gluing detection mostly depends on manual work, and detection is performed offline. However, the labor intensity of manual detection is high, the standard execution of each person is different, the detection result is affected, and the error rate is high. And the manual efficiency is too low, the cost is high, and the requirements of high yield and low cost of factories cannot be met.
Disclosure of Invention
The invention aims to provide a screw gluing detection device capable of automatically detecting screw gluing conditions.
In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides a rubber coating detection device of screw, including the transport mechanism that is used for conveying the screw, be used for gathering the side view image acquisition mechanism of screw side view direction rubber coating condition and be used for gathering the overlook image acquisition mechanism of screw overlook direction rubber coating condition, transport mechanism includes the conveying platform, a plurality of screws are arranged in proper order on the conveying platform, the conveying platform can drive the screw along the transfer path that sets for, have set gradually side view detection region and overlook detection region in the transfer path, side view image acquisition mechanism sets up in the side view detection region outside, side view image acquisition mechanism includes first light source and the first camera that is used for the illumination of side view detection region, the camera view range of first camera can hold side view detection region, overlook image acquisition mechanism includes the second light source and the second camera that are used for the illumination of overlook detection region, the camera view range of view image acquisition mechanism can hold overlook detection region, the rubber coating detection device still includes the rotation mechanism that sets up in overlook detection region, the transport mechanism can drive the screw and pass through detection region and detection region in proper order, when transport mechanism will look down detection region with the screw, the rotation mechanism can take a round rotation in the side view region in the screw and take a round rotation in the side view region in the first rotation process; when the screw is conveyed into the overlook detection area by the conveying mechanism, the second light source can illuminate the screw in the overlook detection area, and the second camera can shoot and acquire an image of the overlook direction of the screw.
Specifically, the rubber coating detection device still includes the controller that control first camera and second camera were shot, photoelectric switch and the rotation angle detector that is connected with the controller respectively, photoelectric switch sets up in the screw position department that gets into the side view detection area, when the screw got into side view detection area, photoelectric switch can trigger the first camera of controller control and begin to shoot the screw, rotation angle detector can detect the angular velocity of screw rotation in side view detection area and transmit for the controller, the frequency that the first camera of controller control was shot according to the angular velocity of screw rotation.
Preferably, the rotation angle detector is an encoder, the encoder is connected with the rotation mechanism, and when the rotation mechanism drives the screw to rotate, the rotating shaft of the encoder can synchronously rotate with the screw, and the rotating angle of the rotating shaft of the encoder is the same as the rotating angle of the screw.
Preferably, the first light source and the first camera are located on the same side of the screw, and the first light source is a surface light source for foreground lighting relative to the first camera.
Further, the first light source is connected with the controller, the controller can control the first light source to emit light in a stroboscopic mode, and the first camera is controlled to photograph the screw within the exposure time of the first light source.
Preferably, a light shielding plate is mounted on the first light source, the light shielding plate can move on the light emitting surface of the first light source to adjust the position, and the light shielding plate can cover part of the light emitting surface of the first light source.
Preferably, the glue spreading detection device further comprises a brightening plate, wherein the brightening plate is located at one side of the screw and opposite to the first light source, the brightening plate is provided with a reflecting surface, and the reflecting surface can reflect light rays of the first light source so as to improve the brightness of a photo shot by the first camera.
Specifically, the second camera is located above the overlook detection area, and the lens of the second camera faces downwards and faces the screw entering the overlook detection area.
Preferably, the second light source is an annular light source, and the second light source is arranged between a lens of the second camera and the screw.
Specifically, the controller is a PLC controller.
The terms of the directions, such as front, back, left, right, up, down, and the like, referred to above are defined as directions of the screw in normal use of the glue detecting device.
The scope of the present invention is not limited to the specific combination of the above technical features, but also covers other technical features formed by any combination of the above technical features or their equivalents. Such as those described above, and those disclosed in the present application (but not limited to) having similar functions, are replaced with each other.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the side view image acquisition mechanism and the overlook image acquisition mechanism are adopted to acquire the side view direction and the overlook direction images on the screw, so that the manual detection is effectively replaced, the speed is high, the efficiency is high, the work is stable, the labor cost of a factory is greatly saved, the uninterrupted production for 24 hours can be realized, and the productivity is greatly improved; the glue coating detection device has accurate detection results of glue height, head material dipping and seat surface glue shortage of the screw 100, and no omission.
Drawings
FIG. 1 is a schematic perspective view of a glued screw;
FIG. 2 is a top view of a rubberized screw;
FIG. 3 is a front view of a glued screw;
FIG. 4 is a schematic diagram of a three-dimensional structure of a glue detecting device for screws according to the present invention;
FIG. 5 is a schematic view of another perspective structure of the device for detecting glue applied to screws according to the present invention;
FIG. 6 is an enlarged partial schematic view of FIG. 5A;
FIG. 7 is a schematic view of another three-dimensional structure of the device for inspecting glue applied to screws according to the present invention;
wherein: 1. a first light source; 2. a first camera; 3. a second light source; 4. a second camera; 5. an optoelectronic switch; 6. an encoder; 7. a light shielding plate; 8. a brightening plate; 100. a screw; 101. glue; 102. a glue part; 103. a glue shortage part; 104. and a glue lifting position.
Detailed Description
As shown in fig. 1 to 3, when the glue 101 is applied to the screw 100 in a large scale, there is a case where glue is sometimes generated at the head of the screw 100 due to the problems of operation and process, namely, the illustrated glue portion 102; there is also a case where there is a shortage of glue on the head seat surface of the screw 100, namely, a shortage of glue 103 as shown. These situations need to be avoided, and in order to eliminate the glue screws 100 having these defects, a glue detection device is used, which is capable of detecting the glue height H of the glue applied to the screws 100.
As shown in fig. 4 to 7, the glue spreading detection device for screws according to the present invention includes a conveying mechanism (not shown) for conveying the screws 100, a side view image acquisition mechanism for acquiring side view glue spreading conditions of the screws 100, a top view image acquisition mechanism for acquiring top view glue spreading conditions of the screws 100, a controller (not shown), and a photoelectric switch 5 and a rotation angle detector respectively connected to the controller. In this embodiment, the controller is a PLC controller, and the rotation angle detector is an encoder 6. The PLC is respectively connected with the conveying mechanism, the side-view image acquisition mechanism and the overlook image acquisition mechanism and controls the conveying mechanism, the side-view image acquisition mechanism and the overlook image acquisition mechanism to work.
The conveying mechanism comprises a conveying platform, a plurality of screws 100 are sequentially arranged on the conveying platform, and the conveying platform can drive the screws 100 to move along a set conveying path. The side view detection area and the overlook detection area are sequentially arranged in the conveying path, the side view image acquisition mechanism is arranged outside the side view detection area, in this embodiment, a turntable (not shown) capable of rotating under the drive of the power mechanism is adopted as a conveying platform for conveying the screws 100, and the screws 100 are circumferentially distributed along the edge of the turntable. The screw 100 revolves around the center of the turntable along with the rotation of the turntable and sequentially passes through the side view detection area and the top view detection area.
Due to the anisotropy of the glue applied to the side of the screw 100, 360 degrees of detection of the glue applied surface of the screw 100 is required. The invention realizes the image acquisition of the gluing surface of the screw 100 for one circle through the side view image acquisition mechanism. The side view image acquisition mechanism comprises a first light source 1 for illuminating the side view detection area and a first camera 2 for taking side images of the screw 100 within the side view detection area. The lens angle range of the first camera 2 can accommodate a side view detection area. The glue application detecting device further comprises a rotation mechanism (not shown) arranged in the side view detecting area. When the screw 100 is sent into the side view detection area by the conveying mechanism, the rotation mechanism is contacted with the screw 100 and can drive the screw 100 to rotate around the axis thereof in the running process. In this embodiment, the rotation mechanism is a belt transmission mechanism, the screw 100 is detachably mounted on a jig, the periphery of the jig has a circumferential surface, the jig rotates along with the turntable, when the jig contacts with a belt of the belt transmission mechanism, the belt runs, and under the action of friction force, the jig rotates against the belt to drive the screw 100 to rotate. In the side view detection area, the screw rotates around the axis of the screw while revolving around the center of the revolving disk.
The first light source 1 can illuminate the screw 100 in the side view detection area, and the first camera 2 can shoot and obtain side images of the screw 100 rotating one circle for a plurality of times. Specifically, the photoelectric switch 5 is disposed at the entrance of the side-view detection area, and when the screw 100 enters the side-view detection area, the photoelectric switch 5 can trigger the PLC controller to control the first camera 2 to start photographing the screw 100. The rotating shaft of the encoder 6 is in contact connection with the belt of the rotation mechanism, when the rotation mechanism drives the screw 100 to rotate, the rotating shaft of the encoder 6 can synchronously rotate with the screw 100 under the drive of the belt, and the rotating angle of the rotating shaft of the encoder 6 is the same as the rotating angle of the screw 100, so that the encoder 6 can detect the rotating angle of the screw 100 in a side view detection area and transmit the rotating angle to the PLC. The PLC controller controls the photographing frequency of the first camera 2 according to the rotation angle of the screw 100, so that the screw 100 is ensured to pass through a side view detection area, the first camera 2 obtains a side image of one circle of the screw 100 through repeated interval photographing, and the PLC controller can splice photos taken by the first camera 2 for multiple times to obtain an image of the whole circle of the side of the screw 100.
The first light source 1 and the first camera 2 are located on the same side of the screw 100, and the first light source 1 is a surface light source for foreground lighting relative to the first camera 2. Thus, the first light source 1 can illuminate a region on the side of the screw 100, the illuminated region on the screw 100 can reflect light, and the first camera 2 can clearly capture a side image of the screw 100 in the region. The first light source 1 is connected with the PLC, the first light source 1 adopts a high-brightness light source, the illuminance is up to 100000Lx, and the first light source 1 cannot be always bright due to large heating value. In this embodiment, the PLC controller can control the first light source 1 to emit light in a stroboscopic manner, and the PLC controller controls the first camera 2 to photograph the screw 100 within the exposure time of the first light source 1. According to the color of the screw 100 and the glue, the exposure time of the first light source 1 is set to 0.2ms for the black screw 100 and the glue in the embodiment, so that the image shot by the first camera 2 is ensured not to be smeared, and the strong reflection of the black product is ensured. If the color is light, the requirement can be met by only increasing the exposure time, and the first light source 1 can be compatible with products with different colors.
In addition, since the glue-rising portion 104 of the screw 100 has a certain gradient, the glue-rising portion is illuminated by the light of the first light source 1, and meanwhile, the non-glued area of the screw 100 is illuminated, which is not beneficial to highlighting the glue-rising position. Therefore, the first light source 1 of the present embodiment is mounted with the light shielding plate 7, the light shielding plate 7 can move the adjustment position on the light emitting surface of the first light source 1, and the light shielding plate 7 can cover a part of the light emitting surface of the first light source 1. The light shielding plate 7 is adjusted to face the glue starting position 104 of the screw 100, so that the glue starting position 104 is not lightened, the area, which is not glued, on the screw 100 is lightened and strongly reflects light, and the area appears as a highlight area at the first camera 2, so that the image of the glue starting position 104 shot by the first camera 2 is clearly visible. After the glue lifting position of the screw 100 is obtained through the side view image acquisition mechanism, the glue height of the glue coated on the screw 100 can be measured. The adhesive condition of the head of the screw 100 can be clearly seen in the area where the head of the screw 100 is illuminated by the first light source 1, the black point at the adhesive is displayed at the first camera 2, and the screw 100 adhered with the adhesive is screened by setting a threshold value.
The glue spreading detection device further comprises a brightening plate 8, wherein the brightening plate 8 is located on one side of the screw 100 and opposite to the first light source 1, the brightening plate 8 is provided with a reflecting surface, and the reflecting surface can reflect light rays of the first light source 1 so as to improve the brightness of a photo shot by the first camera 2.
The overlook image acquisition mechanism is arranged outside the overlook detection area. The overhead image acquisition mechanism comprises a second light source 3 and a second camera 4 for illuminating the overhead detection area. The lens angle range of the second camera 4 can accommodate the top view detection area. Specifically, the second camera 4 is located above the top view detection area, and the lens of the second camera 4 faces downward and faces the screw 100 entering the top view detection area. The second light source 3 is an annular light source, and the second light source 3 is disposed between the lens of the second camera 4 and the screw 100.
When the screw 100 is fed into the top view detection area by the conveying mechanism, the second light source 3 can illuminate the screw 100 in the top view detection area, and the second camera 4 can capture and obtain an image of the screw 100 in the top view direction. Under the irradiation of the second light source 3, if the situation of lack of glue occurs on the head base of the screw 100, the reflection of the light in the lack of glue area is very strong, and the screw 100 with lack of glue on the head base can be screened by the second camera 4.
The side view image acquisition mechanism and the overlook image acquisition mechanism are used for acquiring images of the side view direction and the overlook direction on the screw 100, images of the side face, the top face and the head base of the screw 100 can be obtained, the screws 100 with glue and the lack of glue at the positions can be rapidly distinguished and removed through automatic analysis images of the controller, and the glue height H of the glue coated on the screws 100 is detected. The glue spreading detection device provided by the invention replaces manual detection, is efficient and stable, greatly saves labor cost of factories, can realize continuous production for 24 hours, and greatly improves productivity. The detection results of the glue height, the head material dipping and the seat surface glue shortage of the screw 100 are accurate. The side view image acquisition mechanism, the overlook image acquisition mechanism and other components are integrated in a modularized manner, so that the later maintenance is easy.
As described above, we have fully described the gist of the present invention, but the present invention is not limited to the above-described embodiments and implementation methods. A practitioner of the related art may make various changes and implementations within the scope of the technical idea of the present invention.
Claims (7)
1. A rubber coating detection device of screw, its characterized in that: including the transport mechanism that is used for conveying screw (100), be used for gathering the side view image acquisition mechanism of screw (100) side view direction rubber coating condition and be used for gathering the overlooking image acquisition mechanism of screw (100) overlooking direction rubber coating condition, transport mechanism includes the conveying platform, a plurality of screws (100) are arranged in proper order on the conveying platform, the conveying platform can drive screw (100) along the conveyer path removal of settlement, set gradually side view detection zone and overlooking detection zone in the conveyer path, side view image acquisition mechanism sets up in the side view detection zone outside, side view image acquisition mechanism includes first light source (1) and first camera (2) that are used for giving side view detection zone illumination, the camera view range of first camera (2) can hold side view detection zone, overlooking image acquisition mechanism sets up in the overlooking detection zone outside, overlooking image acquisition mechanism includes second light source (3) and second camera (4) that are used for overlooking detection zone illumination, the camera view range of second camera (4) can hold the detection zone, rubber coating detection device still includes the mechanism that sets up in the detection zone, side view detection zone rotation detection zone can drive screw (100) and autorotation detection zone when overlooking detection mechanism and autorotation detection zone take place in the screw (100) to rotate in the side view zone to rotate in proper order in the axial line when the side view detection zone (100), the first light source (1) can illuminate the screw (100) in the side view detection area, and the first camera (2) can shoot for a plurality of times to obtain side images of the screw (100) rotating for one circle; when the screw (100) is conveyed into the overlooking detection area by the conveying mechanism, the second light source (3) can illuminate the screw (100) in the overlooking detection area, and the second camera (4) can shoot and obtain an image of the screw (100) in the overlooking direction; the glue spreading detection device further comprises a controller for controlling the first camera (2) and the second camera (4) to shoot, a photoelectric switch (5) and a rotation angle detector, wherein the photoelectric switch (5) and the rotation angle detector are respectively connected with the controller, the photoelectric switch (5) is arranged at the position where the screw (100) enters the side-looking detection area, when the screw (100) enters the side-looking detection area, the photoelectric switch (5) can trigger the controller to control the first camera (2) to start shooting the screw (100), the rotation angle detector can detect the rotation angular speed of the screw (100) in the side-looking detection area and transmit the rotation angular speed to the controller, and the controller controls the shooting frequency of the first camera (2) according to the rotation angular speed of the screw (100); the second camera (4) is positioned above the overlook detection area, and the lens of the second camera (4) faces downwards and faces towards the screw (100) entering the overlook detection area; the first light source (1) and the first camera (2) are positioned on the same side of the screw (100), and the first light source (1) is a surface light source for lighting the foreground relative to the first camera (2).
2. The glue spreading detecting device for screws according to claim 1, wherein: the rotation angle detector is an encoder (6), the encoder (6) is connected with the rotation mechanism, and when the rotation mechanism drives the screw (100) to rotate, the rotating shaft of the encoder (6) can synchronously rotate with the screw (100) and the rotating angle of the rotating shaft of the encoder (6) is the same as the rotating angle of the screw (100).
3. The glue spreading detecting device for screws according to claim 1, wherein: the first light source (1) is connected with the controller, the controller can control the first light source (1) to emit light in a stroboscopic mode, and the first camera (2) is controlled to shoot the screw (100) within the exposure time of the first light source (1).
4. A glue application detection device for screws according to claim 2, characterized in that: the light source device is characterized in that a light shielding plate (7) is arranged on the first light source (1), the light shielding plate (7) can move on the light emitting surface of the first light source (1) to adjust the position, and the light shielding plate (7) can cover part of the light emitting surface of the first light source (1).
5. A glue application detection device for screws according to claim 2, characterized in that: the glue spreading detection device further comprises a brightening plate (8), wherein the brightening plate (8) is located on one side of the screw (100) and opposite to the first light source (1), the brightening plate (8) is provided with a reflecting surface, and the reflecting surface can reflect light of the first light source (1) so as to improve the brightness of a photo shot by the first camera (2).
6. The glue spreading detecting device for screws according to claim 1, wherein: the second light source (3) is an annular light source, and the second light source (3) is arranged between a lens of the second camera (4) and the screw (100).
7. The glue spreading detecting device for screws according to claim 1, wherein: the controller is a PLC controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611123171.9A CN106645151B (en) | 2016-12-08 | 2016-12-08 | Gluing detection device for screws |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611123171.9A CN106645151B (en) | 2016-12-08 | 2016-12-08 | Gluing detection device for screws |
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| CN106645151A CN106645151A (en) | 2017-05-10 |
| CN106645151B true CN106645151B (en) | 2024-03-08 |
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| CN110142228B (en) * | 2019-06-01 | 2021-06-25 | 哈尔滨理工大学 | Saw blade crack detection, identification and sorting system and sorting method |
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| CN105855181A (en) * | 2015-01-21 | 2016-08-17 | 苏州兰叶光电科技有限公司 | Optical detection system for LED package precision support appearance quality |
| CN204594418U (en) * | 2015-03-05 | 2015-08-26 | 广州机械科学研究院有限公司 | A kind of Glue Spreading Robot tree lace automatic detection device |
| CN105817431A (en) * | 2016-05-07 | 2016-08-03 | 肇庆市宏华电子科技有限公司 | Intelligent appearance defect high-speed detection machine |
| CN206208771U (en) * | 2016-12-08 | 2017-05-31 | 苏州德创测控科技有限公司 | A kind of gluing detection means of screw |
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