CN108016840A - A kind of LED based multiple views conveyer belt longitudinal tear image-pickup method - Google Patents
A kind of LED based multiple views conveyer belt longitudinal tear image-pickup method Download PDFInfo
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- CN108016840A CN108016840A CN201711220734.0A CN201711220734A CN108016840A CN 108016840 A CN108016840 A CN 108016840A CN 201711220734 A CN201711220734 A CN 201711220734A CN 108016840 A CN108016840 A CN 108016840A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 28
- 238000009434 installation Methods 0.000 claims abstract description 6
- 238000013461 design Methods 0.000 claims abstract description 3
- 239000013307 optical fiber Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 230000007257 malfunction Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/02—Control devices, e.g. for safety, warning or fault-correcting detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating
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Abstract
The invention discloses a kind of LED based multiple views conveyer belt longitudinal tear image-pickup method.Including two line-scan digital cameras, gigabit switch, image acquisition and processing device, LED light source, PC machine；It is connected between line-scan digital camera and image acquisition and processing device and image acquisition and processing device and PC machine by gigabit switch.Two line-scan digital cameras are respectively arranged between the upper belt of conveyer belt and lower belt.It is characterized in that, the installation site of camera is determined according to the requirement of conveyer belt and its design feature and line-scan digital camera shooting image of associated components, and then ensures that the image that two cameras collect forms the complete conveyer belt upper belt lower surface complete image information of a width after image acquisition and processing device splicing.The present invention uses LED light source as image capture device light filling, thus image frame is clear.The present invention can collect complete, clearly conveyor belt surface image, lay a good foundation to improve the accuracy of conveyer belt longitudinal tear malfunction monitoring and real-time.
Description
Technical field
The invention belongs to conveyer belt longitudinal tear to monitor field, defeated more particularly, to a kind of multiple views based on LED light source
Send band longitudinal tear image-pickup method.
Background technology
Conveyer belt often produces longitudinal tear failure during material is transported, and main cause is included by scrap iron and steel or bastard coal
Load caused by the foreign matters such as stone or barrier scratch, the mounting and adjusting of belt conveyor is improper, blanking is out of alignment at transfer point
It is uneven etc..If the failure, which cannot be detected and handled in time, will occur longitudinal tear accident, halt production, transported material are caused
Loss, equipment damage and casualties, seriously affect safety in production.At present, the conveyer belt based on machine vision technique is indulged
Conveyer belt longitudinal tear failure can precisely, be quickly detected to tear monitoring method, but due to conveyer belt size difference
Greatly, the speed of service is fast, working environment is poor, carrying material is more, so in the conveyer belt longitudinal tear event based on machine vision technique
Hinder in monitoring scheme, how quickly to gather in conveyer belt operational process conveyor belt surface completely, clearly image information
As the key factor for influencing conveyer belt longitudinal tear malfunction monitoring.The present invention is mainly according to the structure of conveyer belt, working environment
The features such as propose a kind of LED based multiple views conveyer belt longitudinal tear image-pickup method.
The content of the invention
In view of this, the present invention is directed to propose a kind of multiple views conveyer belt longitudinal tear Image Acquisition based on LED light source
Method, conveyer belt upper belt lower surface complete image information when this method can fast and accurately gather conveyer belt operation, to carry
The accuracy and real-time of high conveyer belt longitudinal tear malfunction monitoring lay the foundation.
The present invention is to solve the above problems using following technical scheme：
A kind of LED based multiple views conveyer belt longitudinal tear image-pickup method.Handed over including two line-scan digital cameras, gigabit
Change planes, image acquisition and processing device, LED light source, PC machine；Line-scan digital camera is filled with image acquisition and processing device and image acquisition and processing
Put and be connected respectively by gigabit switch between PC machine.Two line-scan digital cameras are respectively arranged at the upper belt and hypodermis of conveyer belt
Between band.It is characterized in that, is determined according to the requirement of conveyer belt and its design feature and line-scan digital camera shooting image of associated components
The installation site of camera, to ensure that the image that two cameras collect forms one after image acquisition and processing device splicing
The complete conveyer belt upper belt lower surface complete image information of width, and then realize that conveyer belt longitudinal tear failure is examined in PC machine
Survey.
Further, conveyer belt longitudinal tear image-pickup method further includes the LED light source for line-scan digital camera light filling, institute
State LED light source to be arranged between conveyer belt upper belt and lower belt, the light that the LED light source is sent is through conveyer belt upper belt
Reflection light vertical irradiation after reflection enters camera.
Further, the LED light source has snoot.
Further, the linear array industrial camera uses L5023MG51 industrial cameras.
Further, the gigabit ethernet switch has power port and optical fiber interface.
Further, described image acquisition processing device is using DSP as core.
Further, described image acquisition processing device has gigabit Ethernet communication function.
Further, described image acquisition processing device obtains the image information of each line-scan digital camera by gigabit switch
And realize image mosaic function.
Further, the image of splicing is sent to PC machine by described image acquisition processing device by gigabit switch.
Further, the PC machine is used for conveyer belt longitudinal tear fault detect.
Relative to the prior art, a kind of multiple views conveyer belt longitudinal tear image based on LED light source of the present invention
Acquisition method has the advantage that：
1st, the present invention gathers conveyer belt upper belt lower surface image using two high speed linear array industrial cameras and uses LED light
Source is to line-scan digital camera light filling, image clearly, the high resolution of collection；Usage data collection processing unit realizes image mosaic, figure
As information completely.
2nd, the present invention realizes image mosaic and using gigabit Ethernet transmission data using dsp processor, improves image
Processing and transmission rate, provided a strong guarantee for the real-time detection of the conveyer belt longitudinal tear failure based on machine vision.
3rd, LED based multiple views conveyer belt longitudinal tear image-pickup method of the present invention, collection image quality is good, response
Speed is fast, can be widely popularized.
Brief description of the drawings：
A kind of LED based multiple views conveyer belt longitudinal tear image-pickup method block diagram of system of Fig. 1 present invention.
Fig. 2 conveyer belt structure schematic diagrames
Icon：1- camera installation sites；2- conveyer belt upper belts；3- conveyer belt lower belts.
Fig. 3 two line-scan digital camera schematic view of the mounting position of the present invention.
Icon：1- conveyer belt upper belts；2- line-scan digital cameras 1；3- line-scan digital cameras 2；4- conveyer belt upper belts central axes；5- is defeated
Send band upper belt horizontal line.
Embodiment：
The embodiment of invention is described below in conjunction with the accompanying drawings, the embodiment is shown in the drawings.Below with reference to
The embodiment of attached drawing description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
As shown in Figure 1, a kind of LED based multiple views conveyer belt longitudinal tear image-pickup method, including two are used for
Gather the line-scan digital camera, the LED light source for light filling, the gigabit for being used for transmission data of conveyer belt upper belt lower surface image information
Interchanger, the PC machine for Image Acquisition and splicing image acquisition and processing device, for longitudinal tear detection.
The present invention uses two line-scan digital cameras, and the resolution ratio of camera is 2K, maximum sweep rate 51K, i.e., acquisition per second
5100 two field pictures.Two line-scan digital cameras tilt be installed between the upper belt of conveyer belt and lower belt respectively, as shown in Figure 2.Two
Platform camera is arranged symmetrically relative to the perpendicular bisector of conveyer belt upper belt, and camera primary optical axis is with conveyer belt upper belt horizontal line angle
45 ° of degree, camera lens center are D with conveyer belt upper belt distance, as shown in Figure 3.The camera of line-scan digital camera is focusing for VST
Camera lens VS-0814H1, visual field are 135 °.
Two line-scan digital cameras are connected by gigabit switch with data acquisition processing device, and the gigabit switch has electricity
Mouthful and optical fiber interface, image mosaic that the Data Data acquisition processing device photographs two line-scan digital cameras and by described
Gigabit switch is transmitted to PC machine, and the PC machine completes conveyer belt longitudinal tear fault detect.
A kind of LED based multiple views conveyer belt longitudinal tear image-pickup method work step of the present invention is as follows：
Step 1：The shooting breadth of camera is determined according to conveyer belt bandwidth.
Further, the conveyer belt characteristic parameter includes the bandwidth W of conveyer belt.
Further, the shooting breadth of the camera is Fov.
Further, each camera shooting width Fov ＞=W/2.
Step 2：Camera lens center and conveyer belt upper belt distance D are calculated according to above-mentioned parameter.
Further, the visual field of the camera lens is 135 °.
Further, optical center and conveyer belt upper belt distance D ＞=tan (135/2) * (W/2).
Step 3：The installation site of light source is determined according to camera position.
Further, the installation site of the light source meets that the light that the LED light source is sent is anti-through conveyer belt upper belt
Reflection light vertical irradiation after penetrating enters camera.
Step 4：Data acquisition processing device obtains the view data that each camera collects by gigabit switch.
Step 5：Data acquisition processing device utilizes image mosaic technology, is spliced into a secondary complete conveyor belt surface figure
Picture.
Step 6：The conveyer belt image for splicing completion is transmitted to PC machine by data acquisition processing device by interchanger.
Step 7：PC machine is according to complete conveyer belt image detection longitudinal tear failure.
Relative to the prior art, the multiple views conveyer belt longitudinal tear Image Acquisition of the present invention based on LED light source
Method has the advantage that：Present invention use multiple linear array industrial cameras collection conveyor belt surface image, the image clearly of collection,
Completely, provided a strong guarantee for conveyer belt longitudinal tear fault detect.So as to avoid the generation of conveyer belt longitudinal tear accident,
The appearance for situations such as reducing halt production, equipment damage and casualties.
Claims (8)
- A kind of 1. LED based multiple views conveyer belt longitudinal tear image-pickup method.Feature includes two line-scan digital cameras, gigabits Interchanger, image acquisition and processing device, LED light source, PC machine；Line-scan digital camera and image acquisition and processing device and image acquisition and processing It is connected respectively by gigabit switch between device and PC machine.Two line-scan digital cameras are respectively arranged at the upper belt of conveyer belt with Between belt.It is characterized in that, it is true according to the requirement of conveyer belt and its design feature and line-scan digital camera shooting image of associated components The installation site of camera is determined, to ensure that the image that two cameras collect is formed after image acquisition and processing device splicing The complete conveyer belt upper belt lower surface complete image information of one width, and then realize that conveyer belt longitudinal tear failure is examined in PC machine Survey.
- 2. requiring a kind of LED based multiple views conveyer belt longitudinal tear image-pickup method according to right 1, its feature exists In this method further includes LED light source, and the LED light source is arranged between conveyer belt upper belt and lower belt, the LED light source Reflection light vertical irradiation of the light sent after the reflection of conveyer belt upper belt enters camera.
- 3. requiring a kind of LED based multiple views conveyer belt longitudinal tear image-pickup method according to right 2, its feature exists L5023MG51 industrial cameras are used in the line-scan digital camera.
- 4. requiring a kind of LED based multiple views conveyer belt longitudinal tear image-pickup method according to right 2, its feature exists There is power port and optical fiber interface in the gigabit ethernet switch.
- 5. requiring a kind of LED based multiple views conveyer belt longitudinal tear image-pickup method according to right 2, its feature exists In described image acquisition processing device using DSP as core.
- 6. requiring a kind of LED based multiple views conveyer belt longitudinal tear image-pickup method according to right 2, its feature exists There is gigabit Ethernet communication function in described image acquisition processing device.
- 7. requiring a kind of LED based multiple views conveyer belt longitudinal tear image-pickup method according to right 2, its feature exists The image information of each line-scan digital camera is obtained by gigabit switch in described image acquisition processing device and realizes image mosaic Function.
- 8. requiring a kind of LED based multiple views conveyer belt longitudinal tear image-pickup method according to right 2, its feature exists The image of splicing is sent to PC machine by gigabit switch in described image acquisition processing device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711220734.0A CN108016840A (en) | 2017-11-28 | 2017-11-28 | A kind of LED based multiple views conveyer belt longitudinal tear image-pickup method |
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| CN201711220734.0A CN108016840A (en) | 2017-11-28 | 2017-11-28 | A kind of LED based multiple views conveyer belt longitudinal tear image-pickup method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111222510A (en) * | 2020-03-13 | 2020-06-02 | 中冶长天国际工程有限责任公司 | Trolley grate bar image shooting method and system of sintering machine |
| CN111289529A (en) * | 2020-02-28 | 2020-06-16 | 瑞思特(珠海)科技有限责任公司 | Conveying belt tearing detection system and detection method based on AI intelligent analysis |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20180511 |