SMT production line operation and maintenance method and system based on digital twinning technology

Abstract

The invention discloses an SMT production line operation and maintenance method and system based on a digital twinning technology, and belongs to the technical field of production line operation and maintenance. Identifying a network transmission channel path in a factory area through an interaction behavior of a control logic instruction realized by an internal interface of production line equipment, and mapping a digital twinborn body; capturing a fault data flow formed between the central node and the non-central node, and judging a fault logic control relationship between the production line equipment; taking any interaction node 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 the production line equipment; representing the fault operation and maintenance situation of the production line equipment, analyzing the fault cooperation probability between the production line equipment, updating the fault cooperation probability, and outputting an operation and maintenance list; according to the invention, based on the interaction behavior of the control logic instruction realized by the interface protocol, when the conduction range of the local fault behavior is expanded, the fault cooperative behavior can be quantified among different production line devices, and the timeliness and effectiveness of the operation and maintenance of the production line are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of production line operation and maintenance, and specifically to an SMT production line operation and maintenance method and system based on digital twin technology. Background Art

[0002] SMT production line, namely surface mount technology (SMT) production line, is a new generation of electronic assembly technology production line developed from hybrid integrated circuit technology. In modern production technology, the coordinated operation of production line equipment can be achieved through interface protocols. During the linkage process of various production line equipment, the interactive accuracy of program instructions to the control equipment is high. In particular, when the control logic instructions flow to unauthorized production line equipment and the control logic instructions are modified by unauthorized generating equipment, local fault behavior expands the linkage transmission range of various production line equipment, affecting the timeliness and effectiveness of production line equipment operation and maintenance. Summary of the invention

[0003] The purpose of the present invention is to provide an SMT production line operation and maintenance method and system based on digital twin technology to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: An SMT production line operation and maintenance system based on digital twin technology, the system includes: a network configuration module, a fault log module, a fault feature capture module and an operation and maintenance analysis center module; The network configuration module is used to generate network configuration information within the factory area, identify the network transmission channel path within the factory area through the interactive behavior of the control logic instructions implemented by the interface inside the production line equipment, and mark the interactive nodes to map the digital twin; The fault log module is used to capture and store the fault data flow formed between the central node and the non-central node, and determine the fault logic control relationship between the production line equipment; The fault feature capture module, based on the fault logic control relationship, takes any interactive node as the operation and maintenance object, generates a first operation set and a second operation and maintenance set respectively, and evaluates the fault operation and maintenance index of the production line equipment; The operation and maintenance analysis center module characterizes the failure operation and maintenance situation of the production line equipment through a two-dimensional coordinate system based on the failure operation and maintenance index, analyzes the failure coordination probability between the production line equipment, updates the failure coordination probability, warns and outputs the operation and maintenance list; The network configuration module, the fault log module and the fault feature capture module are connected in sequence; the output end of the fault log module is connected to the input end of the fault feature capture module, and the input end of the operation and maintenance analysis center module is respectively connected to the output ends of the fault log module and the fault feature capture module.

[0005] Further, the network configuration module includes a network channel unit and a node marking unit; The network channel unit is used to form a network transmission channel path through interactive nodes; The node marking unit marks the central node and the non-central node based on the network transmission channel path; The output end of the network channel unit is connected to the input end of the node marking unit.

[0006] Further, the fault log module includes a fault event recording unit and a fault relationship determination unit; The fault event recording unit is used to record the fault event of the production line equipment and the access time generated by the interactive behavior in the fault event, wherein the fault includes the control logic instruction flowing to the unauthorized production line equipment and the control logic instruction being modified by the unauthorized production equipment; The fault relationship determination unit is used to obtain the fault data flow formed between the central node and the non-central node, and determine the fault logic control relationship between the production line equipment based on the fault data flow, wherein the fault logic control relationship includes a direct fault coordination relationship and an indirect fault coordination relationship; The output end of the fault event recording unit is connected to the input end of the fault relationship determination unit.

[0007] Further, the fault feature capture module includes an operation and maintenance object generation unit and an operation and maintenance feature processing unit; The operation and maintenance object generation unit is used to select an operation and maintenance object and generate a first operation and maintenance set and a second operation and maintenance set respectively based on a fault logic control relationship; The operation and maintenance feature processing unit analyzes and evaluates the fault operation and maintenance index of the production line equipment based on the first operation and maintenance set and the second operation and maintenance set; The output end of the operation and maintenance object generation unit is connected to the input end of the operation and maintenance feature processing unit.

[0008] Furthermore, the operation and maintenance analysis center module includes 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 constructs a two-dimensional coordinate system based on the fault operation and maintenance index, and generates a fault operation and maintenance situation curve point set of the production line equipment; The fault operation and maintenance analysis unit generates 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 analyzes and evaluates the fault coordination probability between the production line equipment; The update decision unit updates the fault coordination probability in real time based on the fault event, compares the fault coordination probability with the updated fault coordination probability, issues an early warning, and generates an operation and maintenance list; The output end of the fault operation and maintenance situation characterization unit is respectively connected to the input ends of the fault operation and maintenance analysis unit and the update decision unit, and the output end of the fault operation and maintenance analysis unit is connected to the input end of the update decision unit.

[0009] A SMT production line operation and maintenance method based on digital twin technology is applied to an SMT production line operation and maintenance system based on digital twin technology of the present invention, and the method comprises the following steps: Step S1: Record the interactive behaviors generated during the operation of the production line, where the interaction refers to the interaction of control logic instructions between the production line devices; based on the network configuration information within the factory area, mark the interactive nodes in the interactive behaviors, including central marking and non-central marking; Step S2: Capture the fault data flow formed between the central node and the non-central node through the fault events of the production line equipment, and determine the fault logic control relationship between the production line equipment; Step S3: Based on the fault logic control relationship, taking any interactive node as the operation and maintenance object, respectively generating a first operation set and a second operation and maintenance set, and evaluating the fault operation and maintenance index of the production line equipment; Step S4: Based on the fault operation and maintenance index, the fault operation and maintenance status of the production line equipment is characterized through a two-dimensional coordinate system, and the fault coordination probability between the production line equipment is analyzed, the fault coordination probability is updated, and an early warning and output of the operation and maintenance list are issued.

[0010] Furthermore, the specific implementation process of step S1 includes: Obtain the network configuration information in the factory area, identify the network transmission channel path in the factory area, take a production line device in the production line as an interaction node, generate a digital twin, and the network transmission channel path is composed of the interaction nodes; uniformly number the production line equipment, and record the interaction node corresponding to any i-th production line equipment as ; The interactive nodes are marked as central nodes and non-central nodes. Exists in at least two network transmission channel paths, then the interactive node Marked as a central node, otherwise marked as a non-central node.

[0011] Furthermore, the specific implementation process of step S2 includes: Retrieve the fault events of the production line equipment, the faults include the control logic instruction flowing to the unauthorized production line equipment and the control logic instruction being modified by the unauthorized production equipment; when a fault event occurs, capture the central node and non-central node with consistent access time, and form a fault data flow between the captured central node and non-central node, and connect the interaction node corresponding to the i-th production line equipment The fault data flow formed when it acts as a central node is recorded as , the interaction node corresponding to the j-th production line equipment The fault data flow formed when it acts as a central node is recorded as , where I represents the total number of production line equipment, Represents the central node There exists an ath non-central node with consistent access time. Represents the central node There is a b-th non-central node with consistent access time; Based on the fault data flow, the fault logic control relationship between the production line equipment is captured. The fault logic control relationship includes direct fault coordination relationship and indirect fault coordination relationship. If any two central nodes and There is a fault logic control relationship between , then it represents the central node With the central node There is a direct fault coordination relationship between any two central nodes. and There is a fault logic control relationship between and , then it represents the central node With the central node There is an indirect fault coordination relationship between them.

[0012] Furthermore, the specific implementation process of step S3 includes: Based on the fault logic control relationship, the interaction node corresponding to the i-th production line equipment For the operation and maintenance object, obtain the central node All interactive nodes with direct fault coordination relationships generate the first operation and maintenance set, which is recorded as ; Get the central node All interactive nodes with indirect fault coordination relationships generate the second operation and maintenance set, which is recorded as ; Based on the first operation and maintenance set and the second operation and maintenance set, analyze and evaluate the fault operation and maintenance index of the i-th production line equipment , where represents the failure operation index of the i-th production line equipment when the y-th failure event occurs, Indicates the first operation set and the second operation set The number of interaction nodes contained in the intersection set between them, Indicates the first operation set and the second operation set The number of interaction nodes included in the union set; According to the above method, when a fault occurs between local production line equipment, the direct and indirect affected production line equipment of the local conduction can be characterized through the fault logic control relationship. In particular, the interaction of control instructions is based on the design link of production line operation, and the interactive behavior of control logic instructions implemented by the interface protocol has multiple authentication attributes, such as the sender of the instruction needs to authenticate the transient idle state of the instruction receiver, such as the instruction receiver needs to authenticate the authority of the instruction sender. When a local fault occurs, the control logic relationship of the instruction is prone to disorder, but the disordered control logic relationship, that is, the fault logic control relationship can reflect the global fault coordination relationship of the production line equipment.

[0013] Furthermore, the specific implementation process of step S4 includes: Based on the fault operation and maintenance index, a two-dimensional coordinate system is constructed, and the fault operation and maintenance situation curve point set of the i-th production line equipment is generated, which is recorded as ,in, represents the point coordinates, Y represents the total number of fault events; Smoothly connect each coordinate point in sequence to obtain the fault operation and maintenance situation curve function of the i-th production line equipment , analyze and evaluate the probability of coordinated failures between production line equipment , where represents the failure coordination probability between the i-th production line equipment and the j-th production line equipment, represents the set of curve points of the fault operation and maintenance situation of the j-th production line equipment, Represents the fault operation and maintenance situation curve function of the j-th production line equipment; According to the above method, the calculation of the fault coordination probability is based on the principle of integral error. If the overlap between the fault operation and maintenance situation curves is higher, it means that the fault coordination relationship of the production line equipment is closer, and thus the fault coordination probability is greater.

[0014] When the fault event occurs for the Y+1th time, let Y=Y+1 and update the fault coordination probability , denoted as ,like Greater than or equal to , an early warning is issued, and an operation and maintenance list is generated in descending order according to the updated failure coordination probability, and sent to the operation and maintenance port.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: in an SMT production line operation and maintenance method and system based on digital twin technology provided by the present invention, the interactive behavior of the control logic instructions implemented through the internal interface of the production line equipment is used to identify the network transmission channel path within the factory area and map out a digital twin; the fault data flow formed between the central node and the non-central node is captured to judge the fault logic control relationship between the production line equipment; taking any interactive node as the operation and maintenance object, a first operation set and a second operation and maintenance set are generated respectively to evaluate the fault operation and maintenance index of the production line equipment; the fault operation and maintenance situation of the production line equipment is characterized, the fault coordination probability between the production line equipment is analyzed, the fault coordination probability is updated, and an operation and maintenance list is output; the interactive behavior of the control logic instructions implemented by the present invention based on the interface protocol can quantify the fault coordination behavior between different production line equipment when the local fault behavior transmission range is expanded, thereby improving the timeliness and effectiveness of the production line operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] Figure 1 It is a schematic diagram of the steps of an SMT production line operation and maintenance method based on digital twin technology of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the first embodiment of the present invention, an SMT production line operation and maintenance system based on digital twin technology is provided, the system comprising: a network configuration module, a fault log module, a fault feature capture module and an operation and maintenance analysis center module; The network configuration module, the fault log module and the fault feature capture module are connected in sequence; the output end of the fault log module is connected to the input end of the fault feature capture module, and the input end of the operation and maintenance analysis center module is respectively connected to the output ends of the fault log module and the fault feature capture module.

[0020] The network configuration module is used to generate network configuration information within the factory area, identify the network transmission channel path within the factory area through the interactive behavior of the control logic instructions implemented by the interface inside the production line equipment, and mark the interactive nodes to map the digital twin; Wherein, the network configuration module includes a network channel unit and a node marking unit; The network channel unit is used to form a network transmission channel path through interactive nodes; The node marking unit marks the central node and the non-central node based on the network transmission channel path; The output end of the network channel unit is connected to the input end of the node marking unit.

[0021] The fault log module is used to capture and store the fault data flow formed between the central node and the non-central node, and determine the fault logic control relationship between the production line equipment; Wherein, the fault log module includes a fault event recording unit and a fault relationship determination unit; The fault event recording unit is used to record the fault event of the production line equipment and the access time generated by the interactive behavior in the fault event, wherein the fault includes the control logic instruction flowing to the unauthorized production line equipment and the control logic instruction being modified by the unauthorized production equipment; The fault relationship determination unit is used to obtain the fault data flow formed between the central node and the non-central node, and determine the fault logic control relationship between the production line equipment based on the fault data flow, wherein the fault logic control relationship includes a direct fault coordination relationship and an indirect fault coordination relationship; The output end of the fault event recording unit is connected to the input end of the fault relationship determination unit.

[0022] The fault feature capture module, based on the fault logic control relationship, takes any interactive node as the operation and maintenance object, generates a first operation set and a second operation and maintenance set respectively, and evaluates the fault operation and maintenance index of the production line equipment; Wherein, the fault feature capture module includes an operation and maintenance object generation unit and an operation and maintenance feature processing unit; The operation and maintenance object generation unit is used to select an operation and maintenance object and generate a first operation and maintenance set and a second operation and maintenance set respectively based on a fault logic control relationship; The operation and maintenance feature processing unit analyzes and evaluates the fault operation and maintenance index of the production line equipment based on the first operation and maintenance set and the second operation and maintenance set; The output end of the operation and maintenance object generation unit is connected to the input end of the operation and maintenance feature processing unit.

[0023] The operation and maintenance analysis center module characterizes the failure operation and maintenance situation of the production line equipment through a two-dimensional coordinate system based on the failure operation and maintenance index, analyzes the failure coordination probability between the production line equipment, updates the failure coordination probability, warns and outputs the operation and maintenance list; The operation and maintenance analysis center module includes 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 constructs a two-dimensional coordinate system based on the fault operation and maintenance index, and generates a fault operation and maintenance situation curve point set of the production line equipment; The fault operation and maintenance analysis unit generates 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 analyzes and evaluates the fault coordination probability between the production line equipment; The update decision unit updates the fault coordination probability in real time based on the fault event, compares the fault coordination probability with the updated fault coordination probability, issues an early warning, and generates an operation and maintenance list; The output end of the fault operation and maintenance situation characterization unit is respectively connected to the input ends of the fault operation and maintenance analysis unit and the update decision unit, and the output end of the fault operation and maintenance analysis unit is connected to the input end of the update decision unit.

[0024] See also Figure 1 In order to better implement the above-mentioned embodiment 1, a SMT production line operation and maintenance method based on digital twin technology is provided in the present embodiment 2, and the method includes the following steps: Step S1: Record the interactive behaviors generated during the operation of the production line, where the interaction refers to the interaction of control logic instructions between the production line devices; based on the network configuration information within the factory area, mark the interactive nodes in the interactive behaviors, including central marking and non-central marking; Exemplarily, the network configuration information in the factory is obtained, and the network transmission channel path in the factory is identified. A production line device in the production line is used as an interaction node to generate a digital twin, and the network transmission channel path is composed of the interaction nodes. The production line devices are uniformly numbered, and the interaction node corresponding to any i-th production line device is recorded as ; The interactive nodes are marked as central nodes and non-central nodes. Exists in at least two network transmission channel paths, then the interactive node Marked as a central node, otherwise marked as a non-central node.

[0025] Step S2: Capture the fault data flow formed between the central node and the non-central node through the fault events of the production line equipment, and determine the fault logic control relationship between the production line equipment; Exemplarily, a fault event of a production line device is retrieved, wherein the fault includes a control logic instruction flowing to an unauthorized production line device and a control logic instruction being modified by an unauthorized production device; when a fault event occurs, a central node and a non-central node with consistent access time are captured, and a fault data flow is formed between the captured central node and the non-central node, and the interaction node corresponding to the i-th production line device is The fault data flow formed when it acts as a central node is recorded as , the interaction node corresponding to the j-th production line equipment The fault data flow formed when it acts as a central node is recorded as , where I represents the total number of production line equipment, Represents the central node There exists an ath non-central node with consistent access time. Represents the central node There is a b-th non-central node with consistent access time; Based on the fault data flow, the fault logic control relationship between the production line equipment is captured. The fault logic control relationship includes direct fault coordination relationship and indirect fault coordination relationship. If any two central nodes and There is a fault logic control relationship between , then it represents the central node With the central node There is a direct fault coordination relationship between any two central nodes. and There is a fault logic control relationship between and , then it represents the central node With the central node There is an indirect fault coordination relationship between them.

[0026] Step S3: Based on the fault logic control relationship, taking any interactive node as the operation and maintenance object, respectively generating a first operation set and a second operation and maintenance set, and evaluating the fault operation and maintenance index of the production line equipment; For example, based on the fault logic control relationship, the interaction node corresponding to the i-th production line equipment For the operation and maintenance object, obtain the central node All interactive nodes with direct fault coordination relationships generate the first operation and maintenance set, which is recorded as ; Get the central node All interactive nodes with indirect fault coordination relationships generate the second operation and maintenance set, which is recorded as ; Based on the first operation and maintenance set and the second operation and maintenance set, analyze and evaluate the fault operation and maintenance index of the i-th production line equipment , where represents the failure operation index of the i-th production line equipment when the y-th failure event occurs, Indicates the first operation set and the second operation set The number of interaction nodes contained in the intersection set between them, Indicates the first operation set and the second operation set The number of interaction nodes included in the union set.

[0027] Step S4: Based on the fault operation and maintenance index, the fault operation and maintenance situation of the production line equipment is characterized through a two-dimensional coordinate system, and the fault coordination probability between the production line equipment is analyzed, the fault coordination probability is updated, and an early warning and an operation and maintenance list are output; For example, based on the fault operation and maintenance index, a two-dimensional coordinate system is constructed, and a set of fault operation and maintenance situation curve points of the i-th production line equipment is generated, which is recorded as ,in, represents the point coordinates, Y represents the total number of fault events; Smoothly connect each coordinate point in sequence to obtain the fault operation and maintenance situation curve function of the i-th production line equipment , analyze and evaluate the probability of coordinated failures between production line equipment , where represents the failure coordination probability between the i-th production line equipment and the j-th production line equipment, represents the set of curve points of the fault operation and maintenance situation of the j-th production line equipment, Represents the fault operation and maintenance situation curve function of the j-th production line equipment; When the fault event occurs for the Y+1th time, let Y=Y+1 and update the fault coordination probability , denoted as ,like Greater than or equal to , an early warning is issued, and an operation and maintenance list is generated in descending order according to the updated failure coordination probability, and sent to the operation and maintenance port.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A SMT production line operation and maintenance method based on digital twin technology, characterized in that: The method comprises the following steps: Step S1: Record the interactive behaviors generated during the operation of the production line, where the interaction refers to the interaction of control logic instructions between the production line devices; based on the network configuration information within the factory area, mark the interactive nodes in the interactive behaviors, including central marking and non-central marking; Step S2: Capture the fault data flow formed between the central node and the non-central node through the fault events of the production line equipment, and determine the fault logic control relationship between the production line equipment; Step S3: Based on the fault logic control relationship, taking any interactive node as the operation and maintenance object, respectively generating a first operation set and a second operation and maintenance set, and evaluating the fault operation and maintenance index of the production line equipment; Step S4: Based on the fault operation and maintenance index, the fault operation and maintenance status of the production line equipment is characterized through a two-dimensional coordinate system, and the fault coordination probability between the production line equipment is analyzed, the fault coordination probability is updated, and an early warning and output of the operation and maintenance list are issued.

2. According to the SMT production line operation and maintenance method based on digital twin technology according to claim 1, it is characterized in that: The specific implementation process of step S1 includes: Obtain the network configuration information in the factory area, identify the network transmission channel path in the factory area, take a production line device in the production line as an interaction node, generate a digital twin, and the network transmission channel path is composed of the interaction nodes; uniformly number the production line equipment, and record the interaction node corresponding to any i-th production line equipment as ; The interactive nodes are marked as central nodes and non-central nodes. Exists in at least two network transmission channel paths, then the interactive node Marked as a central node, otherwise marked as a non-central node.

3. According to the SMT production line operation and maintenance method based on digital twin technology according to claim 2, it is characterized in that: The specific implementation process of step S2 includes: Retrieve the fault events of the production line equipment, the faults include the control logic instruction flowing to the unauthorized production line equipment and the control logic instruction being modified by the unauthorized production equipment; when a fault event occurs, capture the central node and non-central node with consistent access time, and form a fault data flow between the captured central node and non-central node, and connect the interaction node corresponding to the i-th production line equipment The fault data flow formed when it acts as a central node is recorded as , the interaction node corresponding to the j-th production line equipment The fault data flow formed when it acts as a central node is recorded as , where I represents the total number of production line equipment, Represents the central node There exists an ath non-central node with consistent access time. Represents the central node There is a b-th non-central node with consistent access time; Based on the fault data flow, the fault logic control relationship between the production line equipment is captured. The fault logic control relationship includes direct fault coordination relationship and indirect fault coordination relationship. If any two central nodes and There is a fault logic control relationship between , then it represents the central node With the central node There is a direct fault coordination relationship between any two central nodes. and There is a fault logic control relationship between and , then it represents the central node With the central node There is an indirect fault coordination relationship between them.

4. According to the SMT production line operation and maintenance method based on digital twin technology according to claim 3, it is characterized in that: The specific implementation process of step S3 includes: Based on the fault logic control relationship, the interaction node corresponding to the i-th production line equipment For the operation and maintenance object, obtain the central node All interactive nodes with direct fault coordination relationships generate the first operation and maintenance set, which is recorded as ; Get the central node All interactive nodes with indirect fault coordination relationships generate the second operation and maintenance set, which is recorded as ; Based on the first operation and maintenance set and the second operation and maintenance set, analyze and evaluate the fault operation and maintenance index of the i-th production line equipment , where represents the failure operation index of the i-th production line equipment when the y-th failure event occurs, Indicates the first operation set and the second operation set The number of interaction nodes contained in the intersection set between them, Indicates the first operation set and the second operation set The number of interaction nodes included in the union set.

5. According to the SMT production line operation and maintenance method based on digital twin technology according to claim 4, it is characterized in that: The specific implementation process of step S4 includes: Based on the fault operation and maintenance index, a two-dimensional coordinate system is constructed, and the fault operation and maintenance situation curve point set of the i-th production line equipment is generated, which is recorded as ,in, represents the point coordinates, Y represents the total number of fault events; Smoothly connect each coordinate point in sequence to obtain the fault operation and maintenance situation curve function of the i-th production line equipment , analyze and evaluate the probability of coordinated failures between production line equipment , where represents the failure coordination probability between the i-th production line equipment and the j-th production line equipment, represents the set of curve points of the fault operation and maintenance situation of the j-th production line equipment, Represents the fault operation and maintenance situation curve function of the j-th production line equipment; When the fault event occurs for the Y+1th time, let Y=Y+1 and update the fault coordination probability , denoted as ,like Greater than or equal to , an early warning is issued, and an operation and maintenance list is generated in descending order according to the updated failure coordination probability, and sent to the operation and maintenance port.

6. An SMT production line operation and maintenance system based on digital twin technology, executing an SMT production line operation and maintenance method based on digital twin technology as described in any one of claims 1 to 5, characterized in that: The system includes: a network configuration module, a fault log module, a fault feature capture module and an operation and maintenance analysis center module; The network configuration module is used to generate network configuration information within the factory area, identify the network transmission channel path within the factory area through the interactive behavior of the control logic instructions implemented by the interface inside the production line equipment, and mark the interactive nodes to map the digital twin; The fault log module is used to capture and store the fault data flow formed between the central node and the non-central node, and determine the fault logic control relationship between the production line equipment; The fault feature capture module, based on the fault logic control relationship, takes any interactive node as the operation and maintenance object, generates a first operation set and a second operation and maintenance set respectively, and evaluates the fault operation and maintenance index of the production line equipment; The operation and maintenance analysis center module characterizes the failure operation and maintenance situation of the production line equipment through a two-dimensional coordinate system based on the failure operation and maintenance index, analyzes the failure coordination probability between the production line equipment, updates the failure coordination probability, warns and outputs the operation and maintenance list; The network configuration module, the fault log module and the fault feature capture module are connected in sequence; the output end of the fault log module is connected to the input end of the fault feature capture module, and the input end of the operation and maintenance analysis center module is respectively connected to the output ends of the fault log module and the fault feature capture module.

7. The SMT production line operation and maintenance system based on digital twin technology according to claim 6 is characterized in that: The network configuration module includes a network channel unit and a node marking unit; The network channel unit is used to form a network transmission channel path through interactive nodes; The node marking unit marks the central node and the non-central node based on the network transmission channel path; The output end of the network channel unit is connected to the input end of the node marking unit.

8. The SMT production line operation and maintenance system based on digital twin technology according to claim 7, characterized in that: The fault log module includes a fault event recording unit and a fault relationship determination unit; The fault event recording unit is used to record the fault event of the production line equipment and the access time generated by the interactive behavior in the fault event, wherein the fault includes the control logic instruction flowing to the unauthorized production line equipment and the control logic instruction being modified by the unauthorized production equipment; The fault relationship determination unit is used to obtain the fault data flow formed between the central node and the non-central node, and determine the fault logic control relationship between the production line equipment based on the fault data flow, wherein the fault logic control relationship includes a direct fault coordination relationship and an indirect fault coordination relationship; The output end of the fault event recording unit is connected to the input end of the fault relationship determination unit.

9. The SMT production line operation and maintenance system based on digital twin technology according to claim 8, characterized in that: The fault feature capture module includes an operation and maintenance object generation unit and an operation and maintenance feature processing unit; The operation and maintenance object generation unit is used to select an operation and maintenance object and generate a first operation and maintenance set and a second operation and maintenance set respectively based on a fault logic control relationship; The operation and maintenance feature processing unit analyzes and evaluates the fault operation and maintenance index of the production line equipment based on the first operation and maintenance set and the second operation and maintenance set; The output end of the operation and maintenance object generation unit is connected to 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, characterized in that: The operation and maintenance analysis center module includes 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 constructs a two-dimensional coordinate system based on the fault operation and maintenance index, and generates a fault operation and maintenance situation curve point set of the production line equipment; The fault operation and maintenance analysis unit generates 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 analyzes and evaluates the fault coordination probability between the production line equipment; The update decision unit updates the fault coordination probability in real time based on the fault event, compares the fault coordination probability with the updated fault coordination probability, issues an early warning, and generates an operation and maintenance list; The output end of the fault operation and maintenance situation characterization unit is respectively connected to the input ends of the fault operation and maintenance analysis unit and the update decision unit, and the output end of the fault operation and maintenance analysis unit is connected to the input end of the update decision unit.

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