CN113887262A - Large-visual-field dynamic product bar code identification system and method - Google Patents
Large-visual-field dynamic product bar code identification system and method Download PDFInfo
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Abstract
The application relates to a large-visual-field dynamic product bar code identification system and a method, firstly, a paper box is received through an edge-approaching mechanism with a preset inclination angle, the paper box falls on the fixed side of a conveyor, the relative position of an edge reference line on one side of the paper box and a code reader focusing line is kept consistent, and then linear scanning identification is carried out on the front surface of the paper box through a linear camera code reader to obtain bar code information; and processing the bar code information through a PLC system and a preset queuing algorithm, and completing control operation by matching with an upper computer. So, change the position of carton on the conveyer through leaning on the limit device to carry out linear scanning discernment through linear camera to the carton, can scan discernment to the positive all regions of carton, solved prior art, require carton bar code rigidity, and can't openly scan the problem, and the cooperation is based on the algorithm of lining up of pulse, realize the seamless interaction of information between carton and the host computer in the motion process, improve work accuracy and work efficiency.
Description
Technical Field
The application relates to the technical field of automatic information identification and information processing, in particular to a large-visual-field dynamic product bar code identification system and a method.
Background
With the development of the field of automation logistics, various distribution centers are built, the warehousing and delivery volumes are multiplied day by day, the current flow of goods cannot be met obviously by means of manual sorting, the problem which is well solved by automatic identification is solved, and the method is widely applied to goods-to-people systems and distribution and delivery systems.
In the prior art, the identification system mainly adopts side scanning and top scanning, and realizes the identification of the bar code through a laser or photographing type code reader, but because the photographing or laser has a small visual field and a limited identification range, the requirement on the pasting position of the bar code is high, namely the bar code is required to be pasted at a fixed position. Meanwhile, for a plurality of enterprises of which the production line is shaped, the code pasting position is already fixed, and the bar codes of different products are different in position, but in the scheme, the identification system has a small identification visual field, can only identify the bar codes at the top and the side and with fixed positions, and the carton needs to be turned to the bar code pasted on the front, so that the application range of the identification system is small, and the identification effect is poor.
Disclosure of Invention
The application provides a large-view dynamic product bar code identification system and method, which aim to solve the problem that in the prior art, in automatic logistics box type distribution, the position of a bar code of a carton is required to be fixed, and the bar code on the front face of the carton cannot be identified.
The above object of the present application is achieved by the following technical solutions:
in a first aspect, an embodiment of the present application provides a large-field dynamic product barcode identification system, including: the device comprises an edge leaning mechanism, a linear camera code reader, a conveyor and a PLC (programmable logic controller);
the input end of the edge-abutting mechanism is used for receiving the carton, the output end of the edge-abutting mechanism is connected with the first end of the conveyor, and an included angle of a preset angle is formed between the edge-abutting mechanism and the conveyor and used for conveying the carton to the target side of the conveyor;
the linear camera code reader is arranged on the conveyor and used for linearly scanning the passing carton and reading the bar code information in the scanning result;
the PLC is connected with the linear camera code reader and used for receiving and processing the bar code information based on a preset pulse queuing algorithm and performing control operation by matching with a preset upper computer.
Further, the edge leaning mechanism comprises a roller.
Further, the conveyor is a belt conveyor.
In a second aspect, an embodiment of the present application further provides a method for identifying a barcode of a large-field dynamic product, including:
scanning the carton through a preset linear camera to obtain bar code information of the carton;
processing the bar code information through a preset PLC system, writing processing results into a data table in a discrete mode based on pulse timing, and sequencing, corresponding to a carton and updating;
and after the carton is conveyed out of the target area, discharging the corresponding data from the data table.
Further, through predetermineeing linear camera scanning carton, acquire the bar code information of carton, include:
detecting the size of the carton;
scanning the carton box through a preset linear camera based on the detection result to obtain a plurality of front scanning sections of the same carton box;
combining the front scanning sections to obtain a complete carton front image;
and analyzing and identifying the bar code information in the front image of the complete carton to obtain the bar code information of the carton.
Further, before detecting the carton size, the method further comprises the following steps:
the position of the carton on the preset conveyor is adjusted through the preset edge leaning mechanism, so that the relative position of the edge reference line on one side of the carton and the relative position of the variable focal line of the linear camera code reader are kept consistent, and the preset linear camera code reader is used for scanning the front face of the carton.
Further, handle through predetermineeing the PLC system bar code information will handle in the result discrete write data table based on the pulse timing to sort, correspond and the update with the carton, include:
writing the processing result into a data table in a discrete mode, taking the identification bit as a data identification, and converting the identification bit into a to-be-processed data;
and transmitting the data in the data table to a preset upper computer for updating the information by the preset upper computer, and converting the identification bit into processed data.
Further, the method also comprises the following steps:
and when the carton is transmitted to the outside of the target area, the corresponding data is discharged from the data table, and then the identification bit is updated to be idle.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
according to the technical scheme provided by the embodiment of the application, firstly, a carton on a trunk line is received through an edge-approaching machine cabinet, the carton passing through an edge-approaching mechanism is made to fall on one fixed side of a conveyor by setting a specific inclination angle, the relative positions of an edge reference line on one side of the carton and a code reader zooming line are kept consistent, and then the front side of the carton is scanned and identified through a linear camera code reader to obtain bar code information; and then, the PLC system is used for matching with an upper computer to complete control operation based on the bar code information corresponding to the cartons one by one. So, change the position of carton on the conveyer through leaning on the limit device to carry out linear scanning discernment to the carton through linear camera, solved prior art, require fixedly to carton bar code position, and can't realize the problem of positive scanning, and the cooperation is based on the algorithm of lining up of pulse, realizes that the carton carries out information seamless interaction with the host computer in the motion process, improves work accuracy and work efficiency.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic block diagram of a large-field dynamic product barcode identification system according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart of a method for identifying a barcode of a large-field dynamic product according to an embodiment of the present application;
fig. 3 is a schematic view illustrating a flow of acquiring barcode information of a carton in a large-visual-field dynamic product barcode identification method according to an embodiment of the present application;
fig. 4 is a schematic flowchart of a queuing algorithm in a large-field dynamic product barcode identification method according to an embodiment of the present application;
fig. 5 is a schematic flowchart of a method for identifying a barcode of a large-field dynamic product according to another embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The application provides a large-visual-field dynamic product bar code identification system and method, which are used for solving the problems that in the prior art, in the automatic logistics box type distribution, the bar code position on a carton is high in requirement, namely the bar code position is fixed to be identified, and the front scanning cannot be realized.
Examples
Fig. 1 is a schematic module view of a large-view dynamic product barcode recognition system provided in an embodiment of the present application, and as shown in fig. 1, the large-view dynamic product barcode recognition system provided in the embodiment of the present application includes an edge approaching mechanism 1, a linear camera code reader 2, a conveyor 3, and a PLC controller 4.
The input end of the edge abutting mechanism 1 is used for receiving cartons from a trunk line, the output end of the edge abutting mechanism 1 is connected with the first end of the conveyor 3, and the edge abutting mechanism 1 and the conveyor 3 form an included angle of a preset angle and are used for conveying the cartons to the target side of the conveyor 3.
Specifically, the edge abutting mechanism 1 may be a roller with an inclination angle of about 30 °, and is a conveying inlet of the system, and a trunk line for receiving a box line, that is, a carton on the trunk line enters the conveyor 3 through the edge abutting mechanism 1. In practical application, cartons with different sizes run on a main trunk line at a certain interval, and the cartons are attached to the right side of a belt of a conveyor 3 to advance after passing through an edge approaching mechanism 1, so that the relative positions of an edge datum line on the right side of the carton and a code reader focusing line are kept consistent in a later information identification link, and the whole front side is completely wrapped by a code reading visual field.
It should be noted that, for convenience of understanding, in order to transport the carton on the right side of the belt of the conveyor 3, the right side of the carton is consistent with the zoom line, and in practical applications, the specific position may also be changed, for example, the carton is transported on the left side of the belt by the edge leaning mechanism 1, all of which is to maintain the relative position of the reference line of one side edge of the carton and the zoom line of the code reader to be consistent, so that the front side of the carton is completely wrapped by the code reading view.
In addition, because the image of linear camera is that the line pixel is made up, if the target object jolts about in the operation process and can cause the picture dislocation, influences the identification rate, so the conveying equipment of camera below will possess the characteristic of steady transportation, and conveyer 3 adopts belt conveyor in this application, can adopt the belt conveyor that length is more than 8 meters to pass through the belt transmission carton for example to satisfy the condition of steady transportation.
The linear camera code reader 2 is arranged on the conveyor 3 and used for linearly scanning the front face of the passing carton and reading the bar code information in the scanning result.
Specifically, the "front scanning" is the same as the "head-on scanning" in that the barcode is attached to the face directly in front of the paper box in the conveying direction, and the barcode is scanned and recognized. The code reader adopts an industrial high-end linear camera, is arranged at the tail part of the conveyor 3, intercepts the front linear section of the carton through high-frequency scanning in the stable advancing process of the carton, synthesizes the finished section diagram, and identifies the two-dimensional code information in the section, thereby realizing the dynamic identification scanning with a large visual field.
And the PLC 4 is connected with the linear camera code reader 2 and is used for receiving and processing the bar code information and is matched with a preset upper computer to perform control operation.
Specifically, the system is realized based on PLC programming, because the demand of pulse collection is greater than 60m/min according to the speed of a main line, the full-load carton spacing is required to be more than 1.2m, the sorting effect is set to 70ms through the actually measured pulse period, the use requirement can be met, the PLC cycle time is required to be controlled to be less than 35ms, the collection processing demand is met, and the control operation is completed by matching with an upper computer based on the preset pulse queuing algorithm.
The large-visual-field dynamic product bar code recognition system provided by the embodiment of the application comprises the steps that firstly, a paper box on a trunk line is received through an edge approaching mechanism 1 such as a roller with a preset angle inclination angle, the paper box passing through the roller falls on one fixed side of a belt, the relative position of an edge reference line on one side of the paper box and a zoom line of a linear camera code reader 2 is kept consistent, and then linear scanning recognition is carried out on the front face of the paper box through the linear camera code reader 2 to obtain bar code information; the bar code information is processed through the PLC 4 and a preset queuing algorithm, control operation is completed by matching with an upper computer, front scanning is completed, a scanning visual field exceeding 1m x 1m can be provided, the process of turning the carton is not needed, scanning can be achieved for the bar codes pasted at any position of the front, the problems that in the prior art, the requirement on the position of the carton bar codes is high, front scanning cannot be achieved are solved, and seamless information interaction between the carton and the upper computer in the motion process is achieved by matching with a pulse-based queuing algorithm, so that the working accuracy and the working efficiency are improved.
Fig. 2 is a schematic flowchart of a method for identifying a barcode of a large-field dynamic product according to an embodiment of the present application, and as shown in fig. 2, the method for identifying a barcode of a large-field dynamic product according to an embodiment of the present application includes:
s201, scanning the carton through a preset linear camera, and acquiring bar code information of the carton.
In practical application, because the sizes of the cross sections of the cartons with different sizes are different greatly, an image acquisition system in a photographing mode cannot capture images well in the movement process, and therefore in the application, the industrial high-end linear camera is adopted to scan the front images of the cartons, and large-view dynamic scanning recognition is achieved.
Fig. 3 is a schematic view of a flow chart for acquiring barcode information of a carton in a large-visual-field dynamic product barcode identification method provided in an embodiment of the present application, and as shown in fig. 3, a scanning stone identification process in the large-visual-field dynamic product barcode identification method provided in the present application includes:
firstly, detecting the size of a section, determining corresponding scanning parameters based on a detection result, and then carrying out linear acquisition; then, a plurality of linear sections on the front side of the carton are intercepted through high-frequency scanning, and linear acquisition is completed; carrying out image synthesis on the collected linear sections to obtain a whole picture of the carton; then, identifying the whole picture, including analyzing the bar code in the picture to obtain bar code information, such as two-dimensional code information; and finally, transmitting the obtained bar code information to a PLC system for the PLC system to perform subsequent data processing.
It should be noted that when the object passes through the linear camera, an image is built for each pixel line of the object, the whole image is finally synthesized, and then the barcode is identified from the synthesized image, so that the requirement on the barcode position is not high, and the barcode at all positions in the front view field can be identified. In addition, the camera has to be combined with an encoder to calculate the real-time speed of the object when the object passes through, the exposure times are few, images with higher resolution can be generated, and the camera plays a vital role in improving the recognition rate.
S202, processing the bar code information through a preset PLC system, writing processing results into a data table in a discrete mode based on pulse timing, sequencing, corresponding to the carton and updating.
And S203, after the carton is transmitted to the outside of the target area, discharging the corresponding data from the data table.
Fig. 4 is a schematic flowchart of a queuing algorithm in the large-view dynamic product barcode identification method provided in the embodiment of the present application, and as shown in fig. 4, the queuing algorithm in the large-view dynamic product barcode identification method provided in the embodiment of the present application includes:
firstly, effective data is extracted from the mentioned bar code information, such as two-dimensional code information, through a preset PLC system, namely, PLC bar code extraction, then queue vacancy inquiry is carried out, bar code data insertion is carried out at the vacancy, then an upper computer processes and sends the data to the next row, and finally the queue discharges and extracts carton information.
Specifically, after the PLC system receives the data, the process of processing the data includes: writing the processing result into a data table in a discrete mode, taking the identification bit as a data identification, and converting the identification bit into a to-be-processed data; transmitting the data in the data table to a preset upper computer for the preset upper computer to update the information, and converting the identification bit into processed data; and when the carton is transmitted to the outside of the target area, namely after the carton is conveyed to the outside, the corresponding data is discharged from the data table, and the identification position is updated to be idle.
The method for identifying the bar code of the large-view dynamic product is used for realizing a head-on bar code scanning mode of bar code position floating, and is based on pulse queuing algorithm codes, when the bar code is stuck to a carton right in front of a moving direction and the position of the carton is not fixed, uninterrupted high-speed identification and information accurate interaction are realized, a packaging program is stable, reliable and convenient to transplant, the debugging is convenient, and the debugging time and the personnel cost are saved; the requirement scene that the carton is swept in the head-on direction is effectively solved; the method is suitable for a code reading mode without stopping at high speed.
Fig. 5 is a schematic flowchart of a method for identifying a barcode of a large-view dynamic product according to another embodiment of the present application, and as shown in fig. 5, the method for identifying a barcode of a large-view dynamic product according to the embodiment of the present application includes:
firstly, the paper boxes are arranged and pulled to a distance, namely the distance between the paper boxes is adjusted, and the paper boxes are conveyed on the fixed side of a conveyor belt through an edge leaning mechanism, namely an edge leaning machine.
Then through setting up the linear camera scanning carton head-on at the band conveyer afterbody, acquire two-dimensional code information, transmit to the PLC system in, supply the PLC system to carry out data processing and cooperate the host computer to carry out data update.
Specifically, the PLC communication cyclic load is set to be 30% so as to meet the real-time performance of communication, an open-IE open communication protocol is adopted in the communication mode of the linear camera and the PLC, and the handshake time is less than 100 ms. After the linear camera transmits information to the PLC, the PLC intercepts and writes effective information into a two-dimensional data table of the PLC, the writing-in is discrete writing-in, the writing-in is different from the stack pressing-in, the identification bit is used for data identification and is used for inquiring and inserting, once the data is written in, the identification bit is converted into 'to be processed', the data is handed to the upper computer for processing, the upper computer can update the going information after processing, the identification bit is converted into 'processed', and after the carton is out of a queue, the identification bit can be automatically updated to be idle. The physical layer information identification process is that the data to be processed are stored in a discrete form in a table and are correspondingly sorted and physically corresponding by pulse counting.
It should be noted that after the carton passes through the linear camera code reader, the barcode information forms a queue in the PLC system, and the queue corresponds to the carton on the belt one by one through the sequencing of pulses, waits for the information processing result of the upper system, and has a length of more than 6 meters, and reserves sufficient processing time for the upper computer 6S according to the design speed of more than 60m/min, so as to ensure the stability of signal interaction.
It should be noted that the upper computer can also be connected with an external MES to achieve the acquisition of information such as work orders, and meanwhile, the PLC can also be connected with a sorting main line to complete subsequent control operations independently or in cooperation with other external devices.
The large-visual-field dynamic product bar code identification method provided by the embodiment of the application can realize head-on scanning of the carton without rotating the carton; meanwhile, the visual field range is large, the bar code can be accurately identified when being stuck to any head-on position, a plurality of sections are scanned and combined to form a finished image, the definition is high, and the use range is large; and the redundancy degree of the pulse queuing algorithm on information interaction is high, so that the method is suitable for a high-speed transmission scene.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (8)
1. A large field of view dynamic product barcode recognition system, comprising: the device comprises an edge leaning mechanism, a linear camera code reader, a conveyor and a PLC (programmable logic controller);
the input end of the edge-abutting mechanism is used for receiving the carton, the output end of the edge-abutting mechanism is connected with the first end of the conveyor, and an included angle of a preset angle is formed between the edge-abutting mechanism and the conveyor and used for conveying the carton to the target side of the conveyor;
the linear camera code reader is arranged on the conveyor and used for linearly scanning the passing carton and reading the bar code information in the scanning result;
the PLC is connected with the linear camera code reader and used for receiving and processing the bar code information based on a preset pulse queuing algorithm and performing control operation by matching with a preset upper computer.
2. The wide field dynamic product barcode identification system of claim 1, wherein the edge proximity mechanism comprises a roller.
3. The wide field dynamic product barcode identification system of claim 1, wherein the conveyor is a belt conveyor.
4. A large-visual-field dynamic product bar code identification method is characterized by comprising the following steps:
scanning the carton through a preset linear camera to obtain bar code information of the carton;
processing the bar code information through a preset PLC system, writing processing results into a data table in a discrete mode based on pulse timing, and sequencing, corresponding to a carton and updating;
and after the carton is conveyed out of the target area, discharging the corresponding data from the data table.
5. The method for barcode recognition of large-field dynamic products according to claim 4, wherein the scanning the carton box by the preset linear camera to obtain the barcode information of the carton box comprises:
detecting the size of the carton;
scanning the carton box through a preset linear camera based on the detection result to obtain a plurality of front scanning sections of the same carton box;
combining the front scanning sections to obtain a complete carton front image;
and analyzing and identifying the bar code information in the front image of the complete carton to obtain the bar code information of the carton.
6. The method of claim 5, further comprising, prior to detecting the carton size:
the position of the carton on the preset conveyor is adjusted through the preset edge leaning mechanism, so that the relative position of the edge reference line on one side of the carton and the relative position of the variable focal line of the linear camera code reader are kept consistent, and the preset linear camera code reader is used for scanning the front face of the carton.
7. The method for identifying the barcode of the dynamic product with the large visual field according to claim 4, wherein the barcode information is processed by a preset PLC system, the processing result is discretely written into a data table based on pulse timing, and the sorting, the corresponding to the carton and the updating are performed, comprising:
writing the processing result into a data table in a discrete mode, taking the identification bit as a data identification, and converting the identification bit into a to-be-processed data;
and transmitting the data in the data table to a preset upper computer for updating the information by the preset upper computer, and converting the identification bit into processed data.
8. The large-field dynamic product barcode recognition method of claim 4, further comprising:
and when the carton is transmitted to the outside of the target area, the corresponding data is discharged from the data table, and then the identification bit is updated to be idle.
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| CN111724445A (en) * | 2020-05-08 | 2020-09-29 | 华中科技大学 | Method and system for identifying large-view small-size identification code |
| CN113033228A (en) * | 2021-03-31 | 2021-06-25 | 曹晓辉 | Bar code scanning device and method for dynamic package |
| CN113104463A (en) * | 2021-04-06 | 2021-07-13 | 济南永信新材料科技有限公司 | Automatic packaging integrated data processing system and method |
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| CN109829346A (en) * | 2019-01-11 | 2019-05-31 | 安徽工程大学 | A kind of bar code and two-dimensional code identification method and system based on machine vision |
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| CN113033228A (en) * | 2021-03-31 | 2021-06-25 | 曹晓辉 | Bar code scanning device and method for dynamic package |
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