CN117421916A - Method for constructing digital twin system of production line of mobile phone assembly workshop - Google Patents
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Abstract
The invention relates to the technical field of digital twinning, in particular to a method for constructing a production line digital twinning system of a mobile phone assembly workshop, which comprises the following steps: establishing a mobile phone assembly equipment model through three-dimensional modeling software; setting and packaging an action script for the behavior of the mobile phone assembly equipment model; establishing a workshop production line scene model according to the mobile phone assembly equipment model and the action script; the layout of mobile phone assembly equipment in an actual workshop production line is adjusted in a one-to-one correspondence mode according to a workshop production line scene model; establishing a data communication channel for mobile phone assembly equipment; binding the mobile phone assembly equipment with the mobile phone assembly equipment model in a one-to-one correspondence manner through a data communication channel; and transmitting signals between the mobile phone assembly equipment and the mobile phone assembly equipment model in real time through a data communication channel to obtain the digital twin system of the production line of the mobile phone assembly workshop. The invention has good effects in real-time performance, mapping state, expansibility and compatibility.
Description
Technical Field
The invention relates to the technical field of digital twin, in particular to a method for constructing a production line digital twin system of a mobile phone assembly workshop.
Background
The production line of the mobile phone assembly workshop has the characteristics of high automation, fine assembly, high flexibility of tasks and the like, and the intelligent technical methods such as digital twinning, data analysis, intelligent scheduling and the like are utilized to energize the manufacturing process under the market environment of strong market competition and rapid product updating of the current mobile phone, so that the efficiency of the production line of the mobile phone assembly workshop is improved, the failure rate is reduced and the like.
At present, digital twinning is widely applied, but the following problems exist in the production line application scene of a mobile phone assembly workshop:
1. the state of the workpiece and the product cannot be expressed in real time: the quantity of sensor devices deployed on the entity workpiece is insufficient, and the workpiece products are not placed in place, fixed in place and the like during transfer, so that mapping cannot be realized in a scene;
2. sensor data quality and accuracy: virtual-real synchronization requires accurate data to be acquired from physical entities and transferred to the digital model. However, the physical sensor may have noise, errors or malfunctions, resulting in degradation of data quality;
3. data real-time and latency: achieving real-time virtual-real synchronization requires ensuring timely transmission and processing of data. For certain application scenarios, such as high-speed motion control or emergency response systems, extremely low delay is required to meet real-time requirements;
4. complexity and extensibility: virtual-real synchronization of building complex systems requires integration of multiple different types of devices, sensors, and digital models and ensures interoperability and compatibility between them. In addition, the scalability of the system is also a challenge, particularly when new devices or models need to be added, taking into account the stability and performance of the overall system.
Disclosure of Invention
The invention provides a method for constructing a digital twin system of a production line of a mobile phone assembly workshop, which aims to solve the problems of data accuracy, instantaneity, expandability and the like of the digital twin system in the prior art caused by complex equipment.
In order to solve the technical problems, the invention provides a method for constructing a line digital twin system of a mobile phone assembly workshop, which comprises the following steps:
s1, establishing a mobile phone assembly equipment model through three-dimensional modeling software;
s2, setting and packaging an action script for the behavior of the mobile phone assembly equipment model;
s3, establishing a workshop production line scene model according to the mobile phone assembly equipment model and the action script;
s4, carrying out one-to-one corresponding adjustment on the layout of mobile phone assembly equipment in an actual workshop production line according to the workshop production line scene model;
s5, establishing a data communication channel for the mobile phone assembly equipment;
s6, binding the mobile phone assembly equipment with the mobile phone assembly equipment model in a one-to-one correspondence manner through the data communication channel;
and S7, transmitting signals between the mobile phone assembly equipment and the mobile phone assembly equipment model in real time through the data communication channel to obtain the digital twin system of the production line of the mobile phone assembly workshop.
Still further, step S1 comprises the sub-steps of:
s11, establishing the mobile phone assembling equipment model through three-dimensional modeling software, and simplifying the mobile phone assembling equipment model;
s12, performing behavior analysis on the mobile phone assembly equipment model to determine the action node, the non-action node and the node hierarchy relation in the mobile phone assembly equipment model;
and S13, performing three-dimensional rendering on the mobile phone assembly equipment model, and outputting the three-dimensional rendering.
Still further, step S2 comprises the sub-steps of:
s21, determining the behavior of the mobile phone assembly equipment model according to the action node and the non-action node, and taking the corresponding behavior as a node object;
s22, setting behavior attributes according to the node hierarchy;
s23, packaging the corresponding action script for the node object according to the behavior data.
Further, the step S3 specifically includes:
and based on the action script, splicing different mobile phone assembly equipment models according to the action interaction relation to obtain the workshop production line scene model.
Further, the step S4 specifically includes:
and according to the layout of different mobile phone assembling equipment models in the workshop production line scene model, different mobile phone assembling equipment in the actual workshop production line is adjusted, so that the positions of the mobile phone assembling equipment models are in one-to-one correspondence with the positions of the mobile phone assembling equipment.
Further, step S5 specifically includes:
and establishing a data communication channel of each mobile phone assembly device by using a PLC, wherein the data communication channel of each mobile phone assembly device is connected through a master control PLC so as to obtain communication data containing a register address of each mobile phone assembly device.
Still further, step S6 comprises the sub-steps of:
s61, configuring the communication data into a preset virtual file in a master control PLC;
s62, performing data conversion on the preset virtual file to input the mobile phone assembly equipment model;
s63, resetting the mobile phone assembling equipment model according to the preset virtual file, so that the mobile phone assembling equipment model and the mobile phone assembling equipment behave the same.
Still further, step S3 further includes the steps of:
adding virtual sensors at the positions where different mobile phone assembling equipment models are spliced according to the behavior interaction relationship so as to acquire behavior data of the mobile phone assembling equipment models;
correspondingly, the step S4 also comprises the steps;
and adding an actual sensor corresponding to the virtual sensor in the actual workshop production line so as to realize state mapping.
Still further, step S61 further includes the steps of:
and preprocessing the communication data summarized by the master control PLC according to the register address.
Further, the preset virtual file is a YML file.
The invention has the beneficial effects that the invention provides a method for constructing the digital twin system of the production line of the mobile phone assembly workshop by combining sensor data acquisition, data processing and partition acquisition, and compared with the digital twin schemes of other production lines of the mobile phone assembly workshop, the method has better effects in real-time performance, mapping state, expansibility and compatibility; the equipment with different mobile phone product requirements can be rapidly designed and debugged while the real-time running state of the production line of the mobile phone assembly workshop is monitored, high-frequency production exchange is realized, and the debugging cost and time are reduced.
Drawings
FIG. 1 is a schematic flow chart of steps of a method for constructing a line digital twin system in a mobile phone assembly shop according to an embodiment of the present invention;
fig. 2 is a schematic diagram of PLC data transmission according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a digital twin system of a production line of a mobile phone assembly shop according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for constructing a line digital twin system in a mobile phone assembly shop according to an embodiment of the present invention, where the method includes the following steps:
s1, establishing a mobile phone assembly equipment model through three-dimensional modeling software.
The mobile phone assembling equipment model aims to realize virtual-real mapping with a workshop on-site production line and provide an optimization basis for the construction of a later production line, so that the subsequent workload is reduced, and the light weight and the fidelity of a scene are improved. Step S1 comprises the following sub-steps:
s11, establishing the mobile phone assembling equipment model through three-dimensional modeling software, and simplifying the mobile phone assembling equipment model.
Specifically, the three-dimensional modeling software used in the implementation process can be SolidWorks, UG, PTC Creo and the like, and in the process, the designed mobile phone assembly equipment model is also required to be simplified, and parts such as screws, nuts, pins, gaskets, non-main moving parts or structural bodies and the like are deleted; when nonlinear fluid such as parts of a linear transmission mode, a belt transmission mode and the like are used as a power source, simulation depiction of an executing piece can be only performed, complex description of the power source is omitted, the number of triangles of a scene is reduced, and the scene fluency is improved in the later period.
S12, performing behavior analysis on the mobile phone assembly equipment model to determine the action node, the non-action node and the node hierarchy relation in the mobile phone assembly equipment model.
According to the child-parent class node relation of the component parts of the behavior logic processing equipment of the execution mechanism in the mobile phone assembly equipment model, the hierarchical relation is set according to the method that the node level is deeper as the execution member is closer to the tail end, for example, a rack, a hood, a structural part and the like of the non-execution mechanism can be combined into a non-action node. Constructing the node hierarchy relation is beneficial to writing the equipment action script.
And S13, performing three-dimensional rendering on the mobile phone assembly equipment model, and outputting the three-dimensional rendering.
Rendering the model after the hierarchical processing. For example, the fidelity of the device and the model can be improved by changing model mapping, drawing textures, illumination modes, transparency, RGB parameters and the like.
S2, setting and packaging an action script for the behavior of the mobile phone assembly equipment model.
The purpose of the action script is to realize the mapping of virtual and real actions. Step S2 comprises the following sub-steps:
s21, determining the behavior of the mobile phone assembly equipment model according to the action node and the non-action node, and taking the corresponding behavior as a node object.
In order to bind the script and the node object, the action node is traversed by hierarchical logic of unit equipment, equipment inner stations, a mechanism in the stations and an action piece in the mechanism, and the node object in the scene is acquired through preset parameters such as node names, IDs and the like.
S22, setting behavior attributes according to the node hierarchy.
The behavior attribute refers specifically to an actual meaning represented by the behavior of the node object, and the node object attribute is set through a hierarchical relationship, for example, for a device node: setting the equipment state, the processing progress, the grafting rate, the processed number, the yield and other attributes; for the station node: the processing state, the station position and other attributes can be set; for the executive node: and setting the attributes such as action stroke, speed, acceleration and the like.
S23, packaging the corresponding action script for the node object according to the behavior data.
Writing action scripts for the corresponding node objects according to the behavior data, such as a cylinder expansion method, a clamping method of a clamp, a robot movement method, a station translation and rotation method and the like; the packaged unit equipment is used for virtual debugging of the whole line, and the problems of process, beat, productivity and the like are exposed before the construction of the production line on site.
S3, establishing a workshop production line scene model according to the mobile phone assembly equipment model and the action script.
The step S3 specifically comprises the following steps:
and based on the action script, splicing different mobile phone assembly equipment models according to the action interaction relation to obtain the workshop production line scene model.
S4, carrying out one-to-one corresponding adjustment on the layout of the mobile phone assembly equipment in the actual workshop production line according to the workshop production line scene model.
The step S4 specifically comprises the following steps:
and according to the layout of different mobile phone assembling equipment models in the workshop production line scene model, different mobile phone assembling equipment in the actual workshop production line is adjusted, so that the positions of the mobile phone assembling equipment models are in one-to-one correspondence with the positions of the mobile phone assembling equipment.
Step S3 further comprises the steps of:
and adding virtual sensors at the positions where different mobile phone assembling equipment models are spliced according to the behavior interaction relationship so as to acquire behavior data of the mobile phone assembling equipment models. In the implementation process, the behavior interaction between the devices is realized by adding a virtual sensor, setting a Blocked event and a clear event of the sensor, and adding a behavior method of the device to the Blocked event or the clear event of the sensor after the device is abutted, and simultaneously changing the parameters of the device such as the processing state, the progress and the like.
Correspondingly, the step S4 also comprises the steps;
and adding an actual sensor corresponding to the virtual sensor in the actual workshop production line so as to realize state mapping. In order to ensure the synchronous effect of the workpieces, sensors are added at the equipment stations, the buffer positions, the two ends of the conveyor belt and the circulation positions, and the states of the workpieces are fed back in real time in a virtual scene, so that the problems that the states of the workpieces are unclear and the virtual and real states are not corresponding are avoided.
Because the assembly parts of the mobile phone workpiece in the mobile phone assembly workshop are fine parts, the transfer state and the fixed state of the material need to be captured in real time, signals such as vacuum negative pressure, photoelectric light opening, cylinder in-place and the like can be added in the implementation process to describe the state of the material, and meanwhile, responses are made in an updating mechanism method of adding the signals corresponding to the scene node attribute in the virtual scene, such as capturing alarm information, equipment names, process names and the like. The real-time mapping method solves the problem that the current equipment cannot feed back in real time in the virtual scene under the conditions of material suction failure, unfixed position, falling during transfer and the like, and achieves real-time mapping of virtual and real states.
S5, establishing a data communication channel for the mobile phone assembly equipment.
A PLC is a hardware device for controlling and monitoring industrial processes, typically located on site, and is responsible for receiving and processing input signals from site sensors; the PLC has a plurality of input/output (I/O) interfaces, and can be directly connected with various types of sensors; the PLC has the characteristics of quick response and high precision, and is suitable for real-time control with high time requirements. The step S5 specifically comprises the following steps:
and establishing a data communication channel of each mobile phone assembly device by using a PLC, wherein the data communication channel of each mobile phone assembly device is connected through a master control PLC so as to obtain communication data containing a register address of each mobile phone assembly device.
In the embodiment of the present invention, as shown in fig. 2, with respect to the master PLC, the data communication channel of each mobile phone assembly device may be implemented by a single PLC, after the mobile phone assembly device performs the filtering operation, the field real-time signal is sent to the master PLC through simple CPU communication, and then the PC end (intermediate device, which is used for running the three-dimensional model including the workshop production line scene model in the embodiment of the present invention) reads the master PLC register through the Modbus TCP/IP protocol.
S6, binding the mobile phone assembly equipment with the mobile phone assembly equipment model in one-to-one correspondence through the data communication channel.
Step S6 comprises the following sub-steps:
s61, configuring the communication data into a preset virtual file in a master control PLC; the preset virtual file is a YML file.
Step S61 further includes the steps of:
and preprocessing the communication data summarized by the master control PLC according to the register address.
S62, performing data conversion on the preset virtual file so as to input the mobile phone assembly equipment model.
The step is mainly to convert pulse variable quantity into variable quantity in a scene according to a certain scale factor for actual requirements of non-Boolean signal data such as stepping motor pulse which needs to be subjected to scale conversion in the scene, so as to realize displacement and rotation change with equivalent effects.
S63, resetting the mobile phone assembling equipment model according to the preset virtual file, so that the mobile phone assembling equipment model and the mobile phone assembling equipment behave the same.
In the embodiment of the invention, the data in the reset state of the mobile phone assembly equipment can be used as default data, so that the synchronization effect can be realized when the digital twin platform mediates halfway.
And S7, transmitting signals between the mobile phone assembly equipment and the mobile phone assembly equipment model in real time through the data communication channel to obtain the digital twin system of the production line of the mobile phone assembly workshop.
In general, as shown in fig. 3, the digital twin system of the production line of the mobile phone assembly plant constructed in the embodiment of the present invention includes a virtual end and a field end, that is, the mobile phone assembly equipment model in the scene model of the production line of the plant and the mobile phone assembly equipment in the actual production line of the plant form a digital twin system, in this system, since the master control PLC is adopted to perform intermediate data turnover, the PLC generally has a relatively strong data processing capability, so that logic operation, calculation and control decision can be performed, and complex control logic can be implemented through its own programming language.
Digital twin control logic for the field side:
1. the on-site real-time signal is transmitted to the master control PLC through simple CPU communication after the filtering operation is carried out on the mobile phone assembly equipment;
2. the PC end (corresponding to the master control PLC and belonging to intermediate equipment) reads a register of the master control PLC through a Modbus TCP/IP protocol, and data of a mobile phone assembly equipment model are set to be the same node attribute as the on-site real-time signal, so that virtual real-time monitoring is realized.
Digital twin control logic for virtual end:
1. the method comprises the steps that equipment node attributes in a workshop production line scene model are manually changed through a PC end, and the PC end sends debugging state signal bits to a master control PLC through a Modbus protocol;
2. the master control PLC sends a debugging signal to the mobile phone assembly equipment through simple CPU communication;
3. the parameters such as debugging bit, debugging parameter address and storage flag bit are read through the unit PLC, so that the data correspond to the node attribute values of the mobile phone assembly equipment model, at the moment, non-Boolean signals such as linear module displacement quantity and manipulator stroke quantity of the mobile phone assembly equipment are converted into pulse signals at the PC end and sent to the master control PLC, and then the pulse signals are sent to the actual mobile phone assembly equipment, so that real-time debugging with real control deficiency is realized.
The invention has the beneficial effects that the invention provides a method for constructing the digital twin system of the production line of the mobile phone assembly workshop by combining sensor data acquisition, data processing and partition acquisition, and compared with the digital twin schemes of other production lines of the mobile phone assembly workshop, the method has better effects in real-time performance, mapping state, expansibility and compatibility; the equipment with different mobile phone product requirements can be rapidly designed and debugged while the real-time running state of the production line of the mobile phone assembly workshop is monitored, high-frequency production exchange is realized, and the debugging cost and time are reduced.
Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM) or the like.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
While the embodiments of the present invention have been illustrated and described in connection with the drawings, what is presently considered to be the most practical and preferred embodiments of the invention, it is to be understood that the invention is not limited to the disclosed embodiments, but on the contrary, is intended to cover various equivalent modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. A method of constructing a line digital twin system for a cell phone assembly shop, the method comprising the steps of:
s1, establishing a mobile phone assembly equipment model through three-dimensional modeling software;
s2, setting and packaging an action script for the behavior of the mobile phone assembly equipment model;
s3, establishing a workshop production line scene model according to the mobile phone assembly equipment model and the action script;
s4, carrying out one-to-one corresponding adjustment on the layout of mobile phone assembly equipment in an actual workshop production line according to the workshop production line scene model;
s5, establishing a data communication channel for the mobile phone assembly equipment;
s6, binding the mobile phone assembly equipment with the mobile phone assembly equipment model in a one-to-one correspondence manner through the data communication channel;
and S7, transmitting signals between the mobile phone assembly equipment and the mobile phone assembly equipment model in real time through the data communication channel to obtain the digital twin system of the production line of the mobile phone assembly workshop.
2. The method of constructing a cell phone assembly shop production line digital twin system according to claim 1, wherein step S1 comprises the sub-steps of:
s11, establishing the mobile phone assembling equipment model through three-dimensional modeling software, and simplifying the mobile phone assembling equipment model;
s12, performing behavior analysis on the mobile phone assembly equipment model to determine the action node, the non-action node and the node hierarchy relation in the mobile phone assembly equipment model;
and S13, performing three-dimensional rendering on the mobile phone assembly equipment model, and outputting the three-dimensional rendering.
3. The method of constructing a cell phone assembly shop production line digital twin system according to claim 2, wherein step S2 comprises the sub-steps of:
s21, determining the behavior of the mobile phone assembly equipment model according to the action node and the non-action node, and taking the corresponding behavior as a node object;
s22, setting behavior attributes according to the node hierarchy;
s23, packaging the corresponding action script for the node object according to the behavior data.
4. The method for constructing a line digital twin system in a mobile phone assembly shop according to claim 3, wherein step S3 specifically comprises:
and based on the action script, splicing different mobile phone assembly equipment models according to the action interaction relation to obtain the workshop production line scene model.
5. The method for constructing a line digital twin system in a mobile phone assembly shop according to claim 4, wherein step S4 specifically comprises:
and according to the layout of different mobile phone assembling equipment models in the workshop production line scene model, different mobile phone assembling equipment in the actual workshop production line is adjusted, so that the positions of the mobile phone assembling equipment models are in one-to-one correspondence with the positions of the mobile phone assembling equipment.
6. The method for constructing a line digital twin system in a mobile phone assembly shop according to claim 5, wherein step S5 specifically comprises:
and establishing a data communication channel of each mobile phone assembly device by using a PLC, wherein the data communication channel of each mobile phone assembly device is connected through a master control PLC so as to obtain communication data containing register addresses of each mobile phone assembly device, and summarizing the communication data.
7. The method of constructing a cell phone assembly shop production line digital twin system according to claim 6, wherein step S6 comprises the sub-steps of:
s61, configuring the communication data into a preset virtual file in a master control PLC;
s62, performing data conversion on the preset virtual file to input the mobile phone assembly equipment model;
s63, resetting the mobile phone assembling equipment model according to the preset virtual file, so that the mobile phone assembling equipment model and the mobile phone assembling equipment behave the same.
8. The method of constructing a line digital twin system for a cell phone assembly shop of claim 5, wherein the step S3 further comprises the steps of:
adding virtual sensors at the positions where different mobile phone assembling equipment models are spliced according to the behavior interaction relationship so as to acquire behavior data of the mobile phone assembling equipment models;
correspondingly, the step S4 also comprises the steps;
and adding an actual sensor corresponding to the virtual sensor in the actual workshop production line so as to realize state mapping.
9. The method of constructing a cell phone assembly shop production line digital twin system according to claim 7, wherein step S61 further comprises the steps of:
and preprocessing the communication data summarized by the master control PLC according to the register address.
10. The method of claim 7, wherein the predetermined virtual file is a YML file.
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