CN119536181A - A SMT production line operation and maintenance method and system based on digital twin technology - Google Patents
A SMT production line operation and maintenance method and system based on digital twin technology Download PDFInfo
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- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
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Abstract
The invention discloses an SMT production line operation and maintenance method and system based on a digital twin technology, and belongs to the technical field of production line operation and maintenance. The invention discloses a method for analyzing the fault coordination probability of production line equipment, which comprises the steps of identifying network transmission channel paths in a factory through interaction behaviors of control logic instructions realized by internal interfaces of the production line equipment, mapping digital twin bodies, capturing fault data streams formed between central nodes and non-central nodes, judging fault logic control relations between the production line equipment, respectively generating a first operation set and a second operation set by taking any one of the interaction nodes as operation and maintenance objects, evaluating fault operation and maintenance indexes of the production line equipment, representing the fault operation and maintenance situation of the production line equipment, analyzing the fault coordination probability between the production line equipment, updating the fault coordination probability and outputting an operation and maintenance list.
Description
Technical Field
The invention relates to the technical field of production line operation and maintenance, in particular to an SMT production line operation and maintenance method and system based on a digital twin technology.
Background
The SMT production line, i.e. the surface assembly technology (Surface Mount Technology, abbreviated as SMT) production line, is a new generation electronic assembly technology production line developed from the hybrid integrated circuit technology, in the modern production technology, the collaborative operation of the production line devices can be realized through an interface protocol, in the process of linking the production line devices, the program instruction interaction precision of the control device is higher, and especially, when the control logic instruction flows to the unauthorized production line devices and the control logic instruction is modified by the unauthorized production device, the local fault behavior leads the linkage conduction range of each production line device to be enlarged, and the timely effectiveness of the operation and maintenance of the production line devices is affected.
Disclosure of Invention
The invention aims to provide an SMT production line operation and maintenance method and system based on a digital twin technology, which are used for solving the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
The SMT production line operation and maintenance system based on the digital twin technology comprises a network configuration module, a fault log module, a fault feature capturing module and an operation and maintenance analysis center module;
The network configuration module is used for generating network configuration information in a factory, identifying a network transmission channel path in the factory through the interaction behavior of control logic instructions realized by an interface in production line equipment, marking interaction nodes and mapping out a digital twin body;
The fault log module is used for capturing and storing fault data streams formed between the central node and the non-central node and judging fault logic control relations between production line equipment;
The fault characteristic capturing module is used for respectively generating a first operation set and a second operation set by taking any one interaction node as an operation and maintenance object based on a fault logic control relation and evaluating a fault operation and maintenance index of production line equipment;
The operation and maintenance analysis center module characterizes the fault operation and maintenance situation of the production line equipment through a two-dimensional coordinate system based on the fault operation and maintenance index, analyzes the fault coordination probability among the production line equipment, updates the fault coordination probability, and early warns and outputs an operation and maintenance list;
The network configuration module, the fault log module and the fault feature capturing module are sequentially connected in sequence, the output end of the fault log module is connected with the input end of the fault feature capturing module, and the input end of the operation and maintenance analysis center module is respectively connected with the output ends of the fault log module and the fault feature capturing module.
Further, the network configuration module comprises a network channel unit and a node marking unit;
the network channel unit is used for forming a network transmission channel path through the interactive nodes;
The node marking unit marks a central node and a non-central node based on a network transmission channel path;
the output end of the network channel unit is connected with the input end of the node marking unit.
Further, the fault log module comprises a fault event recording unit and a fault relation judging unit;
the fault event recording unit is used for recording fault events of the production line equipment and access time generated by interaction in the fault events, wherein the faults comprise control logic instruction flow to the unauthorized production line equipment and modification of the control logic instruction by the unauthorized production equipment;
The fault relation judging unit is used for acquiring a fault data stream formed between the central node and the non-central node, and judging a fault logic control relation between production line equipment based on the fault data stream, wherein the fault logic control relation comprises a direct fault cooperative relation and an indirect fault cooperative relation;
the output end of the fault event recording unit is connected with the input end of the fault relation judging unit.
Further, the fault feature capturing module comprises an operation and maintenance object generating unit and an operation and maintenance feature processing unit;
The operation and maintenance object generation unit is used for selecting an operation and maintenance object and respectively generating a first operation and maintenance set and a second operation and maintenance set based on a fault logic control relation;
the operation and maintenance feature processing unit is used for analyzing and evaluating fault operation and maintenance indexes of the production line equipment based on the first operation and maintenance set and the second operation and maintenance set;
and the output end of the operation and maintenance object generating unit is connected with the input end of the operation and maintenance feature processing unit.
Further, the operation and maintenance analysis center module comprises a fault operation and maintenance situation characterization unit, a fault operation and maintenance analysis unit and an updating decision unit;
the fault operation and maintenance situation characterization unit is used for constructing a two-dimensional coordinate system based on the fault operation and maintenance indexes and generating a fault operation and maintenance situation curve point set of the production line equipment;
the fault operation and maintenance analysis unit is used for generating a fault operation and maintenance situation curve function of the production line equipment based on the fault operation and maintenance situation curve point set, and analyzing and evaluating fault coordination probability among the production line equipment;
The updating decision unit is used for updating the fault cooperative probability in real time based on the fault event, comparing the fault cooperative probability with the updated fault cooperative probability, and early warning and generating an operation and maintenance list;
The output end of the fault operation and maintenance situation characterization unit is respectively connected with the input ends of the fault operation and maintenance analysis unit and the updating decision unit, and the output end of the fault operation and maintenance analysis unit is connected with the input end of the updating decision unit.
The invention discloses an SMT production line operation and maintenance system based on a digital twin technology, which is applied to the SMT production line operation and maintenance system based on the digital twin technology in a matching way, and comprises the following steps:
step S1, recording interaction behavior generated in the production line operation process, wherein the interaction refers to interaction of control logic instructions among production line equipment;
S2, capturing fault data streams formed between a central node and non-central nodes through fault events of production line equipment, and judging fault logic control relations between the production line equipment;
step S3, based on a fault logic control relationship, using any one of the interaction nodes as an operation and maintenance object, respectively generating a first operation set and a second operation and maintenance set, and evaluating a fault operation and maintenance index of production line equipment;
and S4, representing the fault operation and maintenance situation of the production line equipment through a two-dimensional coordinate system based on the fault operation and maintenance index, analyzing the fault coordination probability among the production line equipment, updating the fault coordination probability, and early warning and outputting an operation and maintenance list.
Further, the implementation process of the step S1 includes:
Acquiring network configuration information in a factory, identifying a network transmission channel path in the factory, taking one production line device in a production line as an interaction node, generating a digital twin body, wherein the network transmission channel path is formed by connecting the interaction nodes ;
Marking the interactive nodes with central nodes and non-central nodes, if the interactive nodes areIf the network transmission channel paths exist in at least 2 network transmission channel paths, the interactive node is to be used forMarked as a central node, otherwise marked as a non-central node.
Further, the implementation process of the step S2 includes:
the fault event of the production line equipment is called, the fault comprises that a control logic instruction flows to the unauthorized production line equipment and the control logic instruction is modified by the unauthorized production equipment, when the fault event is generated, a central node and a non-central node with consistent access time are captured, a fault data flow is formed between the captured central node and the non-central node, and an interaction node corresponding to the ith production line equipment is obtained The fault data stream formed when the node is used as the central node is recorded asInteraction node corresponding to jth production line equipmentThe fault data stream formed when the node is used as the central node is recorded asWherein I represents the total number of production line devices,Representation and center nodeThere is an a-th non-central node with consistent access times,Representation and center nodeB non-central nodes with consistent access time exist;
based on the fault data flow, capturing a fault logic control relationship between production line devices, wherein the fault logic control relationship comprises a direct fault cooperative relationship and an indirect fault cooperative relationship, and if any two central nodes are arranged AndThe fault logic control relation exists betweenThen represent the central nodeWith a central nodeIf there is a direct fault co-operation relationship between any two central nodesAndThe fault logic control relation exists betweenAnd is also provided withThen represent the central nodeWith a central nodeThere is an indirect fault co-ordination relationship between them.
Further, the implementation process of the step S3 includes:
Based on the fault logic control relationship, the interaction node corresponding to the ith production line equipment For operation and maintenance object, acquire and center nodeAll interactive nodes with direct fault cooperative relationship and generating a first operation and maintenance set which is recorded asAcquisition and center nodeAll interactive nodes with indirect fault cooperative relationship and generating a second operation and maintenance set which is recorded as;
Analyzing and evaluating the failure operation and maintenance index of the ith production line equipment based on the first operation and maintenance set and the second operation and maintenance setIn which, in the process,Representing the failure operation index of the ith line equipment at the time of the y-th failure event,Representing a first set of operation and maintenanceAnd a second set of operation and maintenanceThe number of interaction nodes contained in the set of intersections,Representing a first set of operation and maintenanceAnd a second set of operation and maintenanceThe number of the interactive nodes contained in the union set;
According to the method, when fault behaviors occur among local production line devices, the directly and indirectly affected production line devices of local conduction can be described through the fault logic control relationship, particularly, the interaction of control instructions is based on the design link of production line operation, the interaction behavior of control logic instructions realized by an interface protocol has multiple authentication attributes, such as the transient idle condition that an instruction sender needs to authenticate an instruction receiver, such as the authority that the instruction receiver needs to authenticate the instruction sender, when the local faults occur, the control logic relationship of the instructions is easy to be disordered, but the disordered control logic relationship, namely, the fault logic control relationship can reflect the global fault synergistic relationship of the production line devices.
Further, the implementation process of the step S4 includes:
Based on the fault operation and maintenance indexes, constructing a two-dimensional coordinate system, generating a fault operation and maintenance situation curve point set of the ith production line equipment, and marking as Wherein, the method comprises the steps of, wherein,Representing point coordinates, Y representing the total number of fault events;
Sequentially and smoothly connecting all coordinate points to obtain a fault operation and maintenance situation curve function of the ith production line equipment Analyzing and evaluating fault co-occurrence probability between production line equipmentIn which, in the process,Representing a fault co-occurrence probability between the ith production line equipment and the jth production line equipment,A fault operation state curve point set for the jth production line equipment is represented,Representing a fault operation state curve function of jth production line equipment;
According to the method, the calculation of the fault coordination probability is based on the integral error principle, if the coincidence ratio between the fault operation and maintenance situation curves is higher, the closer the fault coordination relationship of the production line equipment is, and then the higher the fault coordination probability is.
When the Y+1st occurrence of fault event, let Y=Y+1 and update the fault co-occurrence probabilityIs marked asIf (if)Greater than or equal toAnd sending out an early warning prompt, generating an operation and maintenance list according to the updated fault cooperative probability from large to small, and sending the operation and maintenance list to an operation and maintenance port.
Compared with the prior art, the SMT production line operation and maintenance method and system based on the digital twin technology have the advantages that in the SMT production line operation and maintenance method and system based on the digital twin technology, through interaction of control logic instructions realized by an internal interface of production line equipment, network transmission channel paths in a factory are identified, digital twin bodies are mapped, fault data streams formed between central nodes and non-central nodes are captured, fault logic control relations between the production line equipment are judged, any one of the interaction nodes is used as an operation and maintenance object, a first operation set and a second operation and maintenance set are respectively generated, fault operation and maintenance indexes of the production line equipment are evaluated, fault operation and maintenance situations of the production line equipment are represented, fault cooperation probabilities between the production line equipment are analyzed, an operation and maintenance list is updated, and when the transmission range of local fault behaviors is enlarged, fault cooperation can be quantized between different production line equipment, and timely effectiveness of the production line operation and maintenance is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
FIG. 1 is a schematic diagram of steps of an SMT production line operation and maintenance method based on digital twin technology.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the first embodiment, an SMT production line operation and maintenance system based on a digital twin technology is provided, and the system comprises a network configuration module, a fault log module, a fault feature capturing module and an operation and maintenance analysis center module;
The network configuration module, the fault log module and the fault feature capturing module are sequentially connected in sequence, the output end of the fault log module is connected with the input end of the fault feature capturing module, and the input end of the operation and maintenance analysis center module is respectively connected with the output ends of the fault log module and the fault feature capturing module.
The network configuration module is used for generating network configuration information in a factory, identifying a network transmission channel path in the factory through the interaction behavior of control logic instructions realized by an interface in production line equipment, marking interaction nodes and mapping out a digital twin body;
The network configuration module comprises a network channel unit and a node marking unit;
the network channel unit is used for forming a network transmission channel path through the interactive nodes;
The node marking unit marks a central node and a non-central node based on a network transmission channel path;
the output end of the network channel unit is connected with the input end of the node marking unit.
The fault log module is used for capturing and storing fault data streams formed between the central node and the non-central node and judging fault logic control relations between production line equipment;
the fault log module comprises a fault event recording unit and a fault relation judging unit;
the fault event recording unit is used for recording fault events of the production line equipment and access time generated by interaction in the fault events, wherein the faults comprise control logic instruction flow to the unauthorized production line equipment and modification of the control logic instruction by the unauthorized production equipment;
The fault relation judging unit is used for acquiring a fault data stream formed between the central node and the non-central node, and judging a fault logic control relation between production line equipment based on the fault data stream, wherein the fault logic control relation comprises a direct fault cooperative relation and an indirect fault cooperative relation;
the output end of the fault event recording unit is connected with the input end of the fault relation judging unit.
The fault characteristic capturing module is used for respectively generating a first operation set and a second operation set by taking any one interaction node as an operation and maintenance object based on a fault logic control relation and evaluating a fault operation and maintenance index of production line equipment;
The fault characteristic capturing module comprises an operation and maintenance object generating unit and an operation and maintenance characteristic processing unit;
The operation and maintenance object generation unit is used for selecting an operation and maintenance object and respectively generating a first operation and maintenance set and a second operation and maintenance set based on a fault logic control relation;
the operation and maintenance feature processing unit is used for analyzing and evaluating fault operation and maintenance indexes of the production line equipment based on the first operation and maintenance set and the second operation and maintenance set;
and the output end of the operation and maintenance object generating unit is connected with the input end of the operation and maintenance feature processing unit.
The operation and maintenance analysis center module characterizes the fault operation and maintenance situation of the production line equipment through a two-dimensional coordinate system based on the fault operation and maintenance index, analyzes the fault coordination probability among the production line equipment, updates the fault coordination probability, and early warns and outputs an operation and maintenance list;
the operation and maintenance analysis center module comprises a fault operation and maintenance situation characterization unit, a fault operation and maintenance analysis unit and an updating decision unit;
the fault operation and maintenance situation characterization unit is used for constructing a two-dimensional coordinate system based on the fault operation and maintenance indexes and generating a fault operation and maintenance situation curve point set of the production line equipment;
the fault operation and maintenance analysis unit is used for generating a fault operation and maintenance situation curve function of the production line equipment based on the fault operation and maintenance situation curve point set, and analyzing and evaluating fault coordination probability among the production line equipment;
The updating decision unit is used for updating the fault cooperative probability in real time based on the fault event, comparing the fault cooperative probability with the updated fault cooperative probability, and early warning and generating an operation and maintenance list;
The output end of the fault operation and maintenance situation characterization unit is respectively connected with the input ends of the fault operation and maintenance analysis unit and the updating decision unit, and the output end of the fault operation and maintenance analysis unit is connected with the input end of the updating decision unit.
Referring to fig. 1, in order to better implement the first embodiment, in a second embodiment, an SMT line operation and maintenance method based on digital twin technology is provided, and the method includes the following steps:
step S1, recording interaction behavior generated in the production line operation process, wherein the interaction refers to interaction of control logic instructions among production line equipment;
Exemplary, network configuration information in a factory is obtained, a network transmission channel path in the factory is identified, one production line device in the production line is used as an interaction node to generate a digital twin body, and the network transmission channel path is formed by connecting the interaction nodes ;
Marking the interactive nodes with central nodes and non-central nodes, if the interactive nodes areIf the network transmission channel paths exist in at least 2 network transmission channel paths, the interactive node is to be used forMarked as a central node, otherwise marked as a non-central node.
S2, capturing fault data streams formed between a central node and non-central nodes through fault events of production line equipment, and judging fault logic control relations between the production line equipment;
The fault event of the production line equipment is called, wherein the fault comprises that a control logic instruction flows to the unauthorized production line equipment and the control logic instruction is modified by the unauthorized production equipment, when the fault event is generated, a central node and a non-central node with consistent access time are captured, a fault data flow is formed between the captured central node and the non-central node, and an interaction node corresponding to the ith production line equipment is captured The fault data stream formed when the node is used as the central node is recorded asInteraction node corresponding to jth production line equipmentThe fault data stream formed when the node is used as the central node is recorded asWherein I represents the total number of production line devices,Representation and center nodeThere is an a-th non-central node with consistent access times,Representation and center nodeB non-central nodes with consistent access time exist;
based on the fault data flow, capturing a fault logic control relationship between production line devices, wherein the fault logic control relationship comprises a direct fault cooperative relationship and an indirect fault cooperative relationship, and if any two central nodes are arranged AndThe fault logic control relation exists betweenThen represent the central nodeWith a central nodeIf there is a direct fault co-operation relationship between any two central nodesAndThe fault logic control relation exists betweenAnd is also provided withThen represent the central nodeWith a central nodeThere is an indirect fault co-ordination relationship between them.
Step S3, based on a fault logic control relationship, using any one of the interaction nodes as an operation and maintenance object, respectively generating a first operation set and a second operation and maintenance set, and evaluating a fault operation and maintenance index of production line equipment;
Exemplary, based on the fault logic control relationship, the interaction node corresponding to the ith production line equipment For operation and maintenance object, acquire and center nodeAll interactive nodes with direct fault cooperative relationship and generating a first operation and maintenance set which is recorded asAcquisition and center nodeAll interactive nodes with indirect fault cooperative relationship and generating a second operation and maintenance set which is recorded as;
Analyzing and evaluating the failure operation and maintenance index of the ith production line equipment based on the first operation and maintenance set and the second operation and maintenance setIn which, in the process,Representing the failure operation index of the ith line equipment at the time of the y-th failure event,Representing a first set of operation and maintenanceAnd a second set of operation and maintenanceThe number of interaction nodes contained in the set of intersections,Representing a first set of operation and maintenanceAnd a second set of operation and maintenanceThe number of interaction nodes contained in the union set.
S4, representing fault operation and maintenance situations of production line equipment through a two-dimensional coordinate system based on the fault operation and maintenance indexes, analyzing fault coordination probabilities among the production line equipment, updating the fault coordination probabilities, and early warning and outputting an operation and maintenance list;
Illustratively, a two-dimensional coordinate system is constructed based on the fault operation and maintenance indexes, and a fault operation and maintenance situation curve point set of the ith production line equipment is generated and recorded as Wherein, the method comprises the steps of, wherein,Representing point coordinates, Y representing the total number of fault events;
Sequentially and smoothly connecting all coordinate points to obtain a fault operation and maintenance situation curve function of the ith production line equipment Analyzing and evaluating fault co-occurrence probability between production line equipmentIn which, in the process,Representing a fault co-occurrence probability between the ith production line equipment and the jth production line equipment,A fault operation state curve point set for the jth production line equipment is represented,Representing a fault operation state curve function of jth production line equipment;
when the Y+1st occurrence of fault event, let Y=Y+1 and update the fault co-occurrence probability Is marked asIf (if)Greater than or equal toAnd sending out an early warning prompt, generating an operation and maintenance list according to the updated fault cooperative probability from large to small, and sending the operation and maintenance list to an operation and maintenance port.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, 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.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present invention, and are not intended to limit the present invention, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the above-mentioned embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The SMT production line operation and maintenance method based on the digital twin technology is characterized by comprising the following steps of:
step S1, recording interaction behavior generated in the production line operation process, wherein the interaction refers to interaction of control logic instructions among production line equipment;
S2, capturing fault data streams formed between a central node and non-central nodes through fault events of production line equipment, and judging fault logic control relations between the production line equipment;
step S3, based on a fault logic control relationship, using any one of the interaction nodes as an operation and maintenance object, respectively generating a first operation set and a second operation and maintenance set, and evaluating a fault operation and maintenance index of production line equipment;
and S4, representing the fault operation and maintenance situation of the production line equipment through a two-dimensional coordinate system based on the fault operation and maintenance index, analyzing the fault coordination probability among the production line equipment, updating the fault coordination probability, and early warning and outputting an operation and maintenance list.
2. The SMT production line operation and maintenance method based on digital twin technology as set forth in claim 1, wherein the specific implementation process of step S1 includes:
Acquiring network configuration information in a factory, identifying a network transmission channel path in the factory, taking one production line device in a production line as an interaction node, generating a digital twin body, wherein the network transmission channel path is formed by connecting the interaction nodes ;
Marking the interactive nodes with central nodes and non-central nodes, if the interactive nodes areIf the network transmission channel paths exist in at least 2 network transmission channel paths, the interactive node is to be used forMarked as a central node, otherwise marked as a non-central node.
3. The SMT production line operation and maintenance method based on digital twin technology according to claim 2, wherein the specific implementation process of step S2 comprises:
the fault event of the production line equipment is called, the fault comprises that a control logic instruction flows to the unauthorized production line equipment and the control logic instruction is modified by the unauthorized production equipment, when the fault event is generated, a central node and a non-central node with consistent access time are captured, a fault data flow is formed between the captured central node and the non-central node, and an interaction node corresponding to the ith production line equipment is obtained The fault data stream formed when the node is used as the central node is recorded asInteraction node corresponding to jth production line equipmentThe fault data stream formed when the node is used as the central node is recorded asWherein I represents the total number of production line devices,Representation and center nodeThere is an a-th non-central node with consistent access times,Representation and center nodeB non-central nodes with consistent access time exist;
based on the fault data flow, capturing a fault logic control relationship between production line devices, wherein the fault logic control relationship comprises a direct fault cooperative relationship and an indirect fault cooperative relationship, and if any two central nodes are arranged AndThe fault logic control relation exists betweenThen represent the central nodeWith a central nodeIf there is a direct fault co-operation relationship between any two central nodesAndThe fault logic control relation exists betweenAnd is also provided withThen represent the central nodeWith a central nodeThere is an indirect fault co-ordination relationship between them.
4. The SMT production line operation and maintenance method based on digital twin technology according to claim 3, wherein the specific implementation process of step S3 comprises:
Based on the fault logic control relationship, the interaction node corresponding to the ith production line equipment For operation and maintenance object, acquire and center nodeAll interactive nodes with direct fault cooperative relationship and generating a first operation and maintenance set which is recorded asAcquisition and center nodeAll interactive nodes with indirect fault cooperative relationship and generating a second operation and maintenance set which is recorded as;
Analyzing and evaluating the failure operation and maintenance index of the ith production line equipment based on the first operation and maintenance set and the second operation and maintenance setIn which, in the process,Representing the failure operation index of the ith line equipment at the time of the y-th failure event,Representing a first set of operation and maintenanceAnd a second set of operation and maintenanceThe number of interaction nodes contained in the set of intersections,Representing a first set of operation and maintenanceAnd a second set of operation and maintenanceThe number of interaction nodes contained in the union set.
5. The SMT production line operation and maintenance method based on digital twin technology as set forth in claim 4, wherein the implementation process of step S4 includes:
Based on the fault operation and maintenance indexes, constructing a two-dimensional coordinate system, generating a fault operation and maintenance situation curve point set of the ith production line equipment, and marking as Wherein, the method comprises the steps of, wherein,Representing point coordinates, Y representing the total number of fault events;
Sequentially and smoothly connecting all coordinate points to obtain a fault operation and maintenance situation curve function of the ith production line equipment Analyzing and evaluating fault co-occurrence probability between production line equipmentIn which, in the process,Representing a fault co-occurrence probability between the ith production line equipment and the jth production line equipment,A fault operation state curve point set for the jth production line equipment is represented,Representing a fault operation state curve function of jth production line equipment;
when the Y+1st occurrence of fault event, let Y=Y+1 and update the fault co-occurrence probability Is marked asIf (if)Greater than or equal toAnd sending out an early warning prompt, generating an operation and maintenance list according to the updated fault cooperative probability from large to small, and sending the operation and maintenance list to an operation and maintenance port.
6. An SMT production line operation and maintenance system based on a digital twin technology, for executing an SMT production line operation and maintenance method based on a digital twin technology according to any one of claims 1-5, wherein the system comprises a network configuration module, a fault log module, a fault feature capturing module and an operation and maintenance analysis center module;
The network configuration module is used for generating network configuration information in a factory, identifying a network transmission channel path in the factory through the interaction behavior of control logic instructions realized by an interface in production line equipment, marking interaction nodes and mapping out a digital twin body;
The fault log module is used for capturing and storing fault data streams formed between the central node and the non-central node and judging fault logic control relations between production line equipment;
The fault characteristic capturing module is used for respectively generating a first operation set and a second operation set by taking any one interaction node as an operation and maintenance object based on a fault logic control relation and evaluating a fault operation and maintenance index of production line equipment;
The operation and maintenance analysis center module characterizes the fault operation and maintenance situation of the production line equipment through a two-dimensional coordinate system based on the fault operation and maintenance index, analyzes the fault coordination probability among the production line equipment, updates the fault coordination probability, and early warns and outputs an operation and maintenance list;
The network configuration module, the fault log module and the fault feature capturing module are sequentially connected in sequence, the output end of the fault log module is connected with the input end of the fault feature capturing module, and the input end of the operation and maintenance analysis center module is respectively connected with the output ends of the fault log module and the fault feature capturing module.
7. An SMT production line operation and maintenance system based on digital twinning technology according to claim 6, wherein said network configuration module comprises a network channel unit and a node marking unit;
the network channel unit is used for forming a network transmission channel path through the interactive nodes;
The node marking unit marks a central node and a non-central node based on a network transmission channel path;
the output end of the network channel unit is connected with the input end of the node marking unit.
8. An SMT production line operation and maintenance system based on digital twinning technology according to claim 7, wherein said fault log module comprises a fault event recording unit and a fault relation determination unit;
the fault event recording unit is used for recording fault events of the production line equipment and access time generated by interaction in the fault events, wherein the faults comprise control logic instruction flow to the unauthorized production line equipment and modification of the control logic instruction by the unauthorized production equipment;
The fault relation judging unit is used for acquiring a fault data stream formed between the central node and the non-central node, and judging a fault logic control relation between production line equipment based on the fault data stream, wherein the fault logic control relation comprises a direct fault cooperative relation and an indirect fault cooperative relation;
the output end of the fault event recording unit is connected with the input end of the fault relation judging unit.
9. The SMT production line operation and maintenance system based on digital twin technology according to claim 8, wherein said failure feature capturing module comprises an operation and maintenance object generating unit and an operation and maintenance feature processing unit;
The operation and maintenance object generation unit is used for selecting an operation and maintenance object and respectively generating a first operation and maintenance set and a second operation and maintenance set based on a fault logic control relation;
the operation and maintenance feature processing unit is used for analyzing and evaluating fault operation and maintenance indexes of the production line equipment based on the first operation and maintenance set and the second operation and maintenance set;
and the output end of the operation and maintenance object generating unit is connected with the input end of the operation and maintenance feature processing unit.
10. The SMT production line operation and maintenance system based on digital twin technology according to claim 9, wherein said operation and maintenance analysis center module comprises a fault operation and maintenance situation characterization unit, a fault operation and maintenance analysis unit and an update decision unit;
the fault operation and maintenance situation characterization unit is used for constructing a two-dimensional coordinate system based on the fault operation and maintenance indexes and generating a fault operation and maintenance situation curve point set of the production line equipment;
the fault operation and maintenance analysis unit is used for generating a fault operation and maintenance situation curve function of the production line equipment based on the fault operation and maintenance situation curve point set, and analyzing and evaluating fault coordination probability among the production line equipment;
The updating decision unit is used for updating the fault cooperative probability in real time based on the fault event, comparing the fault cooperative probability with the updated fault cooperative probability, and early warning and generating an operation and maintenance list;
The output end of the fault operation and maintenance situation characterization unit is respectively connected with the input ends of the fault operation and maintenance analysis unit and the updating decision unit, and the output end of the fault operation and maintenance analysis unit is connected with the input end of the updating decision unit.
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