Rotary table visual screening machine and its image recognition system

1. Status quo of rotary visual screening machine

        Glass rotary table type visual screening machine , Also known as optical image filter 、 Four side detector and six side detector , It is aimed at the size of various parts 、 Detection machine developed for defects such as appearance . In industrial production , Due to uncontrollable factors in the production and transportation environment , It is easy to get scratches 、 Crush injury 、 Rubbing and hanging defects . Most of the defects are extremely small , It's even hard for the naked eye to recognize , The rate of defective products caused by these defects has greatly restricted the development of the industry . In the process of transformation and upgrading of China's manufacturing industry , The product quality should be sold to developed countries such as Europe and America , Make products more competitive , It is inevitable that the defective products cannot finally appear in the finished products . One side , If the defective parts can be found in advance , Exclude in advance , That will create a cost advantage , On the other hand , Manual inspection is generally carried out in the working environment of strong light or microscope , People get tired easily , It is easy to misjudge , High requirements for experience , It is not easy to find testing workers in most factories nowadays , Driven by various factors , Automatic and intelligent appearance inspection , It gave birth to a huge market demand . However , Many factories have just changed from artificial to visual , The market potential is unlimited .

      Visual screening machine is used for parts , Widely used in parts with cameras 、 Lithium battery parts 、 Magnetic material 、 Electronic ceramics 、 Rubber products 、 The connector 、 Electronic components 、 Precision hardware, etc . The bulk parts mainly adopt the vibrating plate and other feeding machines to automatically feed and transport materials , Automatic appearance inspection by taking photos on the turntable .

      Outside Chinese Mainland , Rotary screen is mainly used in Taiwan and South Korea , There are few other economies , Among them, Qingbang in Taiwan 、 Exquisite two , Because the electronics industry prevailed in Taiwan in the early years , Start early , They ship a little more , But with the rise of manufacturing in Chinese Mainland , Its market share is basically nibbled and divided up by mainland manufacturers . Optical screening machine , It mainly depends on Chinese Mainland , It is also concentrated in Chinese Mainland .

2. The main configuration of rotary table visual screening machine

chart 1    The core configuration of rotary screen  

      Glass rotary table type visual screening machine , Various parts are transported to the high transparent glass turntable through the vibrating disk , Then the workpiece materials sensed by the turntable are detected and recorded through the entrance , Taught by servo system CCD The location of the camera , When the turntable is turned to the camera position , A controller or PLC Trigger the camera to take pictures , Then the operation . Before discharging , The operation must be completed , If the calculation is not finished , Then it is judged as pending material , Recheck .

        The feeding part , Depending on the type of material , It can be divided into the following categories ：1） Thread manual vibrating disc + Pipeline transportation ,2） Thread manual vibrating disc + Direct vibration ,3）CNC CNC precision vibrating disk ,4） Elevator type conveying + Assembly line, etc . among CNC CNC precision disc , For smaller materials and precision materials , The price is quite expensive , This kind of vibrating disk is usually built into the main machine of the screening machine , Compact structure , Generally used for screening electronic components . Other handmade plates , Then “ host + Loading ” Split way , There are different sizes of workpiece products , For materials of different specifications , The panel surface of the vibrating disk can be replaced for model switching .

                    

       chart 2 Thread manual vibrating disc + Direct vibration                                               chart 3 Precision numerical control vibrating disk + Direct vibration

                           

         chart 4  Elevator type conveying + Assembly line                                                 chart 5 Vibrating plate + Assembly line feeding  

        Camera bracket part , According to its type , It can be divided into the following categories ：1） Prism shooting side ,2）4 Cameras occupy the same station to shoot the side . Support part , The structure has been standardized , Price transparency , Pictured 6 Shown .

                                

                                                        chart 6  Camera bracket

3. The control system of rotary table visual screening machine

       The structure of the screening machine is already transparent , And gradually move towards standardization , The core of the whole machine focuses on the realization of software system and optics . For the whole control system of the screening machine , It is mainly divided into 2 Kind of ,1） be based on PLC The control system of ,2） Controller based control system , Pictured 7 Sum graph 8 Shown .

  chart 7 be based on PLC Control system architecture of screening machine

  chart 8 Control system architecture of screening machine based on motion controller

        It's obvious that , System based on motion controller , Its control composition is more reasonable , More compact , He's missing the touch screen , And PLC The process of interaction , Directly and completely integrated . And the control cycle of the motion control card is very short , High speed response , When the turntable moves faster , It can also accurately capture the material posture , The maximum speed can reach 6000pcs/min, This is a PLC The system can not reach . for example , Dongguan Jingchi Technology Co., Ltd HPHS-W804,HPHS-W806,HPHS-W808 Equal four sides 、 Hexahedron 、 Octahedral universal screening machine , It is specially developed based on motion controller , The product has built-in unique control technology , Sure 100% Ensure that the sorting is blown out 、 Taking pictures 、 The relation of unique mapping induced by workpiece entry .

                  

      chart 9 HPHS-W804                          chart 10 HPHS-W806                            chart 11 HPHS-W808 

4. Image recognition system of rotary table visual screening machine

       Image recognition system , It is the core technology of visual screening machine . Visual screening machine is a very low threshold for entry , A product that is difficult to go to high-end general motors , The targets involved in the screening machine include rubber （ Oil seal 、 seal ring 、 Flat washer 、 Earplug sleeve, etc ）、 Hardware （ Battery cap 、 Battery connector 、 Mobile phone lens circle 、 Screw 、 Nut 、 Other precision hardware, etc ）、 Connector class （ probe 、 A pin 、pogopin、pin The needle 、 copper pillar 、 Male needle 、 Female needle, etc ）, Electronic components （ resistance 、 inductance 、 Capacitance, etc ）、 Magnetic materials （ Magnetic disc 、 Magnetic tile 、 A magnetic ring 、 Magnetic core, etc ）, Precision artificial jewelry point drills ; Camera module parts (VCM Iron shell 、VCM coil 、 Bracket 、Holder、 Barrel 、 Lenses, etc )、 Complex magnetic components 、 Precision hardware parts, etc . Various industry segments can be screened , Because there are too many market segments , Make a simple image system , May also be able to get a piece of the pie in a certain segment . But we should be bigger and stronger in this field , It must be a general and complete image recognition system for the whole industry , Only so , Screening machine manufacturers can quickly find their own customers in each segment , And provide real practical detection value . In terms of the current situation of the industry , There are various manufacturers of screening machines , Be able to complete the general system , Few manufacturers are applicable to various industries . At present, many terminal production plants buy screening machines , In most cases, it is due to the insufficient ability of image software , The site cannot be opened .

chart 12  The functional structure of the universal screening machine system  

    There is a universal screening machine system , To rapidly migrate to various industries , There is no need for R & D personnel to make in-depth modifications , To achieve the universal and instrumented state , The idea and workload of the whole system are quite different , As long as very few companies can do this . Dongguan Jingchi Technology Co., Ltd （ Dongguan Jingchi Software Co., Ltd ） Launched by MindWorks.Sorter General software , The above requirements can be realized .

      chart 14  MindWorks.Sorter Part of the interface

chart 15  MindWorks.Sorter Part of the interface  

chart 16  MindWorks.Sorter Part of the interface  

 5. Application of deep learning in screening machine

         Hundreds of screening machine companies , Everyone fought on their own , It solves a variety of image detection and sorting requirements , In practical application , Find out , Deep learning can be applied to some materials that are difficult to identify , Further improve the intelligent recognition ability , But most materials don't need deep learning . A scheme based on deep learning , Its structure is as follows

          Due to the deep learning configuration GTX2080 Isographics card , Directly and significantly increase the project cost , At the same time, materials shall be sampled , Then mark the defect for training , Increased operational complexity , For some occasions where the traditional realization is unstable , have access to AI Deep learning . In general , Can be solved by traditional technology , Or traditional image processing technology . Deep learning is just the icing on the cake , Add a beautiful thing to a contrasting beautiful thing , As a system implementation , To have a first “ Jin ” To chase flowers .