Material management methods, devices, systems and rail vehicles for passenger car maintenance and repair processes

Abstract

The present invention relates to the field of rail transit technology, and in particular to a material management method, device, system and rail vehicle for passenger car maintenance and repair process, the method comprising: obtaining the possible failure modes and corresponding material replacement requirements of different vehicle models under a specific repair process; establishing a standard BOM for passenger car maintenance and repair processes of different vehicle models under a specific repair process according to the failure modes and the corresponding material replacement requirements; dynamically adjusting the standard BOM for passenger car maintenance and repair processes according to the current actual working conditions of the vehicle and the current repair process, so as to generate a BOM list suitable for the current repair process. The present invention establishes a standard BOM for passenger car maintenance and repair processes of different vehicle models under a specific repair process as a data reference system, dynamically adjusts the standard BOM according to the actual state of the vehicle and the actual repair process, and associates the BOM list with the actual repair process, thereby solving the problem of repeated coding of a material that requires different coding due to different repair processes, and realizing refined management of material inventory.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to a material management method, device, system and rail vehicle for passenger car maintenance and repair. Background Art

[0002] The production cycle of bus maintenance projects is relatively long, and bidding and delivery are based on project dimensions. After the factory receives the bus entry information, the technicians disassemble it and fill in the disassembly technical details. Based on this detail, an Excel technical details list is generated, all of which are delivered in paper documents. The maintenance technical details and process omissions have poor technical guidance, and the parts that need to be disassembled and the installation process are manually delivered. The process execution efficiency is low, and changes in technicians will result in knowledge loss, and a large number of rework problems are prone to occur.

[0003] Normally, buses that are inspected and repaired are not from the original manufacturers, and the repair details and processes need to be confirmed after disassembly on site. Currently, the coordination system after technical disassembly is not smooth: the technical department staff disassembles the vehicle multiple times and issues technical details, which are manually delivered to the procurement department for procurement guidance. However, the delivery time is uncontrollable, and the longer the vehicle stays in the technical department, the greater the impact on subsequent business, and the longer the procurement and production cycles, which often results in missing or excessive technical details.

[0004] In addition, there are materials disassembled during bus maintenance. The same material has different prices due to different repair processes. Different technical details are maintained by the technical department, and multiple material codes are created for different repair processes, and the material prices are also different. This situation greatly increases the duplication of material data, resulting in one material having multiple material codes for different repair processes and different states. The material details after disassembly exist in various states, such as materials to be repaired, scrapped and cannot be repaired and need to be replaced with a new one, etc. The technical details issued must be connected to guide the entire process of procurement, production, logistics delivery, and financial settlement. Therefore, after research and repeated testing, the need to improve the multiple states of materials with multiple codes for one item is also imminent. Summary of the invention

[0005] The present invention provides a material management method, device, system and rail vehicle for passenger car maintenance process, which are used to solve the problems of long production cycle, low process efficiency, repeated material data and unsmooth coordination system in the passenger car maintenance project in the prior art.

[0006] The present invention provides a material management method for a passenger car maintenance process, comprising the following steps: Obtain the possible failure modes and corresponding material replacement requirements of different models under specific repair procedures; According to the failure modes and corresponding material replacement requirements, a standard BOM for the inspection and repair process of buses of different models under specific repair processes is established; According to the current actual working condition and the current maintenance schedule of the vehicle, the standard BOM for the passenger car maintenance schedule is dynamically adjusted to generate a BOM list suitable for the current maintenance schedule.

[0007] According to the material management method for the passenger car maintenance process provided by the present invention, the steps of obtaining the possible failure modes and corresponding material replacement requirements of different vehicle models under a specific maintenance process specifically include: Using a transfer learning strategy, we use the pre-trained network model as a starting point and fine-tune the material recognition task for different vehicle models under specific repair processes; Through the fine-tuned network model, the possible failure modes and corresponding material replacement requirements of different vehicle models under specific maintenance procedures are obtained.

[0008] According to the material management method for the passenger car maintenance process provided by the present invention, the steps of fine-tuning the material identification tasks for different vehicle models under a specific maintenance process specifically include: Obtain material data for different models under any initial repair process; Extracting visual recognition features and structural features of the material data; Using feature fusion technology to fuse the visual recognition feature with the structural feature to obtain a feature fusion result; Based on the feature fusion results, the Isolation Forest algorithm is used to calculate the anomaly of each material to obtain the anomaly score of each material; According to the feature fusion result and the anomaly score, the parameters of the network model are fine-tuned.

[0009] According to the material management method for bus maintenance and repair process provided by the present invention, before the step of establishing a bus maintenance and repair process standard BOM for different models under a specific repair process according to the failure mode and the corresponding material replacement requirements, the method further includes: Build a material master data management system for different maintenance processes; Setting exclusive fields and attribute labels for materials of different repair process evaluation types in the material master data management system, and defining state transition rules for the materials in their life cycle; Formulate a template for filling out the bill of materials and verification rules for the bill of materials of the material master data management system during the bus disassembly stage.

[0010] According to the material management method for bus maintenance and repair process provided by the present invention, the steps of obtaining the bus maintenance and repair process standard BOM of different models under a specific repair process according to the failure mode and the material replacement requirement specifically include: updating the material master data management system according to the failure mode and the corresponding material replacement requirements; Through the updated material master data management system, standard BOM for bus maintenance procedures of different models under specific maintenance procedures can be obtained.

[0011] According to the material management method for bus maintenance and repair process provided by the present invention, after establishing the bus maintenance and repair process standard BOM for different models under a specific repair process, the method further includes: Based on the standard BOM for the bus maintenance and repair process, a digital model for bus maintenance and repair process materials is established to achieve visual management of material information.

[0012] According to the material management method for the passenger car maintenance process provided by the present invention, the step of dynamically adjusting the passenger car maintenance process standard BOM specifically includes: The material information in the digital model is updated according to the current actual working condition and the current repair process of the vehicle.

[0013] According to the material management method for the passenger car maintenance process provided by the present invention, the step of dynamically adjusting the passenger car maintenance process standard BOM specifically includes: According to the current actual working condition and current repair process of the vehicle, the material information in the digital model is revised through multi-person online collaboration; After the revision is completed, the latest version of the BOM is synchronously updated to an online visual mode, and the relevant data in the revision process is stored, including the revision date, the reviser, the reason for the revision and the specific content of the revision.

[0014] According to the material management method for the passenger car maintenance process provided by the present invention, the step of dynamically adjusting the passenger car maintenance process standard BOM specifically includes: Intelligently identify and predict material replacement needs based on the vehicle's current actual operating conditions and current repair schedule; Based on the identification and prediction results, the standard BOM for the passenger car maintenance process is adjusted in terms of materials; According to the material adjustment results, the change prediction of the linkage action corresponding to the material adjustment is carried out; According to the change prediction results, a multi-objective optimization strategy is adopted to optimize the maintenance schedule of the standard BOM of the passenger car maintenance schedule after material adjustment, and a BOM list suitable for the current maintenance schedule is obtained.

[0015] According to the material management method for the passenger car maintenance process provided by the present invention, based on the change prediction result, a multi-objective optimization strategy is adopted to optimize the maintenance process of the passenger car maintenance process standard BOM after material adjustment, specifically including: Design a multi-objective genetic algorithm, taking into account multi-dimensional optimization objectives, including cost, time and quality; According to the change prediction result, the adaptability of the maintenance schedule of the passenger car maintenance schedule standard BOM after the material adjustment is evaluated through the fitness function in the multi-objective genetic algorithm; Based on the adaptability evaluation results, the dependency relationship between different maintenance tasks is analyzed using graph theory; Based on the dependency and the vehicle status data acquired in real time, the sequence and time arrangement of the maintenance and repair procedures are adjusted to form a new maintenance and repair procedure plan.

[0016] The present invention also provides a material management device for passenger car maintenance process, comprising the following modules: The acquisition module is used to obtain the possible failure modes and corresponding material replacement requirements of different vehicle models under specific repair procedures; A standard BOM building module is used to establish a standard BOM for the maintenance and repair process of buses of different models under a specific maintenance process according to the failure mode and the corresponding material replacement requirements; The dynamic adjustment module is used to dynamically adjust the standard BOM of the passenger car maintenance and repair process according to the current actual working condition of the vehicle and the current maintenance process, so as to generate a BOM list suitable for the current maintenance process.

[0017] The present invention also provides a material management system for passenger car maintenance and repair processes, comprising: a memory and one or more processors connected to the memory, the memory storing a computer program, and the processor being used to execute the computer program to implement any of the above-described methods for managing materials for passenger car maintenance and repair processes.

[0018] The present invention also provides a rail vehicle, comprising the above-mentioned material management system for passenger car maintenance and repair process.

[0019] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for managing materials for passenger car maintenance and repair processes as described in any one of the above is implemented.

[0020] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the material management method for the passenger car maintenance process as described in any one of the above is implemented.

[0021] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements any of the above-mentioned methods for managing materials for passenger car maintenance.

[0022] The material management method, device, system and rail vehicle for the passenger car maintenance and repair process provided by the present invention obtains the possible failure modes and corresponding material replacement requirements of different vehicle models under a specific repair process; establishes the standard BOM for the passenger car maintenance and repair process of different vehicle models under a specific repair process according to the failure modes and corresponding material replacement requirements; dynamically adjusts the standard BOM for the passenger car maintenance and repair process according to the current actual working conditions of the vehicle and the current repair process to generate a BOM list suitable for the current repair process. By establishing the standard BOM for the passenger car maintenance and repair process of different vehicle models under a specific repair process as a data reference system, the standard BOM is dynamically adjusted according to the actual state of the vehicle and the actual repair process, and the BOM list is associated with the actual repair process, thereby solving the problem of repeated coding of a material that requires different codes due to different repair processes, and realizing refined management of material inventory. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is one of the flow charts of the material management method for passenger car maintenance and repair process provided by the present invention.

[0025] Figure 2 It is a flow chart of establishing a standard BOM for passenger car maintenance and repair procedures provided by the present invention.

[0026] Figure 3 This is the second flow chart of the material management method for passenger car maintenance and repair process provided by the present invention.

[0027] Figure 4 This is the third flow chart of the material management method for passenger car maintenance and repair process provided by the present invention.

[0028] Figure 5 It is a structural schematic diagram of a material management device for a passenger car maintenance process provided by the present invention.

[0029] Figure 6 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0031] The present invention is described in detail below in conjunction with the accompanying drawings of the specification. The specific operating method in the method embodiment can also be applied to the device embodiment or the system embodiment. In the description of the present invention, unless otherwise specified, "at least one" includes one or more. "Multiple" refers to two or more. For example, at least one of A, B and C includes: A exists alone, B exists alone, A and B exist at the same time, A and C exist at the same time, B and C exist at the same time, and A, B and C exist at the same time. In the present invention, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a kind of association relationship that describes the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0032] The present invention will be described in detail below in conjunction with specific implementation modes.

[0033] In some specific embodiments of the present invention, Figure 1 As shown, this solution provides a material management method for passenger car maintenance process, including: Step 100: Obtain possible failure modes and corresponding material replacement requirements for different vehicle models under specific repair procedures; Step 200: Establish a standard BOM for the inspection and repair process of buses of different models under a specific repair process according to the failure mode and the corresponding material replacement requirements; Step 300: dynamically adjust the standard BOM for the passenger car maintenance and repair process according to the current actual working condition of the vehicle and the current maintenance process, so as to generate a BOM list suitable for the current maintenance process.

[0034] It should be noted that in the existing material management solution, the same material has different prices and codes due to different repair processes, which increases the duplication of material data. In addition, the collaborative system is not smooth after technical disassembly, which leads to extended material procurement and production cycles and cannot meet the material management needs of rail transit.

[0035] Therefore, the present invention obtains the possible failure modes and corresponding material replacement requirements of different vehicle models under specific maintenance procedures, establishes a standard BOM for the passenger car maintenance procedure of different vehicle models under specific maintenance procedures, associates material management with the maintenance procedure, and dynamically adjusts the standard BOM according to the actual maintenance procedure, thereby achieving refined management of material inventory.

[0036] The above steps are described in detail below through specific embodiments.

[0037] Step 100: Obtain possible failure modes and corresponding material replacement requirements for different vehicle models under specific repair procedures; In some possible implementations of the present invention, the steps of obtaining possible failure modes and corresponding material replacement requirements of different vehicle models under a specific repair process specifically include: Using a transfer learning strategy, we use the pre-trained network model as a starting point and fine-tune the material recognition task for different vehicle models under specific repair processes; Through the fine-tuned network model, the possible failure modes and corresponding material replacement requirements of different vehicle models under specific maintenance procedures are obtained.

[0038] Specifically, this embodiment provides an implementation method for obtaining failure modes and corresponding material replacement requirements of different vehicle models under specific repair procedures, and fine-tunes the pre-trained network model to improve the network model's prediction effect on failure modes and corresponding material replacement requirements.

[0039] In a possible embodiment, intelligent material identification and prediction can be performed on materials. Specifically, the data sources of materials are integrated and analyzed, and the factory drawings of buses, previous maintenance records, parts supplier information, and real-time vehicle operation status monitoring data are integrated. Through big data analysis technology, these diversified data are deeply mined to identify the possible failure modes and corresponding parts replacement requirements of different models under specific maintenance procedures.

[0040] In some possible implementations of the present invention, the steps of fine-tuning the material recognition task for different vehicle models under a specific repair process specifically include: Obtain material data for different models under any initial repair process; Extracting visual recognition features and structural features of the material data; Using feature fusion technology to fuse the visual recognition feature with the structural feature to obtain a feature fusion result; Based on the feature fusion results, the Isolation Forest algorithm is used to calculate the anomaly of each material to obtain the anomaly score of each material; According to the feature fusion result and the anomaly score, the parameters of the network model are fine-tuned.

[0041] Specifically, this embodiment provides an implementation method for fine-tuning the material recognition task for different vehicle models under specific repair processes, by extracting features from material data, and fine-tuning the parameters of the network model based on the feature extraction results and the calculated anomaly scores.

[0042] In a possible embodiment, a convolutional neural network (CNN) is used for image feature extraction, wherein a convolution operation is used to capture visual features of the material.

[0043] In a possible embodiment, a recurrent neural network (RNN) or LSTM is introduced to process time series data and generate structured data. The formula is as follows: (1), in, is at the time step The hidden state of is the input, and are weight and bias respectively.

[0044] At the same time, feature fusion technology is used to combine visual recognition data with structured data to improve prediction accuracy through multimodal data fusion.

[0045] Furthermore, an anomaly detection mechanism is introduced. Specifically, the Isolation Forest algorithm is used for anomaly detection to calculate the anomaly score S(x) of each material, which is used to represent the anomaly score of sample x.

[0046] On this basis, an adaptive update mechanism is adopted. By designing a model adaptive update strategy, the model parameters are dynamically adjusted according to the new material data to maintain the accuracy of the prediction results.

[0047] In a specific embodiment, data collection and preprocessing are first performed to collect material images and related data during the bus maintenance process, and preprocessing operations such as normalization and denoising are performed; then model training and optimization are performed, and a transfer learning strategy is used, using the pre-trained network model as a starting point to perform fine-tuning for specific material identification tasks; at the same time, system integration is performed to achieve seamless integration of the intelligent material identification system with the existing material management system through the development of an API interface; the design for user interaction can achieve interactive data visualization, allowing users to intuitively understand the prediction results and the model decision-making process; further, a feedback loop can be set up to compare and analyze the actual material usage with the prediction results by establishing a closed-loop feedback system, and the model can be continuously optimized.

[0048] Step 200: Establish a standard BOM for the inspection and repair process of buses of different models under a specific repair process according to the failure mode and the corresponding material replacement requirements; In some possible implementations of the present invention, before the step of establishing a standard BOM for the maintenance and repair process of buses of different models under a specific maintenance process according to the failure mode and the corresponding material replacement requirements, the method further includes: Build a material master data management system for different maintenance processes; Setting exclusive fields and attribute labels for materials of different repair process evaluation types in the material master data management system, and defining state transition rules for the materials in their life cycle; Formulate a template for filling out the bill of materials and verification rules for the bill of materials of the material master data management system during the bus disassembly stage.

[0049] Specifically, this embodiment provides an implementation method for building a material master data management system for different maintenance and repair processes, and provides a basis for establishing a standard BOM for passenger car maintenance and repair processes by setting material filling rules and verification rules in the material master data management system.

[0050] In a possible embodiment, a material master data management system is constructed through process-based material data reduction.

[0051] Specifically, for the optimization of material master data management, first, design and implement a comprehensive material master data management system, including the creation of application forms, change records, approval flowcharts and operation manuals. On this basis, set exclusive fields and attribute labels for materials of different evaluation types, such as "regular new parts", "old parts to be repaired", etc., and define their state transition rules during the life cycle. Furthermore, develop mobile applications or integrate existing systems to collect on-site information in real time, such as using QR codes to mark and track materials to ensure that material pictures, images and physical information match correctly.

[0052] Regarding the preparation of the bill of materials, during the bus disassembly stage, technicians need to fill in the bill of materials according to the preset template, including but not limited to detailed information such as material code, name, specification model, assessment type, inventory status, vehicle correspondence, etc.; then, by formulating verification rules for the bill of materials, a combination of automatic system comparison and manual review is used to ensure that the list is accurate and reduce the risk of omissions.

[0053] For the repair process evaluation type and material management, by associating the material master data with the evaluation type, such as clarifying the assignment rules of the evaluation type field in the material master data, and the material procurement strategy and inventory management strategy corresponding to different repair process evaluation types. For different evaluation types, set differentiated processing procedures in the logistics distribution and warehousing management links, such as distinguishing storage areas, priorities, picking methods, etc.

[0054] In some possible implementations of the present invention, the step of obtaining a standard BOM of a bus maintenance process for different vehicle models under a specific maintenance process according to the failure mode and the material replacement requirement specifically includes: updating the material master data management system according to the failure mode and the corresponding material replacement requirements; Through the updated material master data management system, standard BOM for bus maintenance procedures of different models under specific maintenance procedures can be obtained.

[0055] Specifically, this embodiment provides an implementation method for obtaining the standard BOM of the passenger car maintenance program for different models under a specific maintenance program, and obtains the standard BOM of the passenger car maintenance program for different models under a specific maintenance program by updating the material master data management system.

[0056] In a possible implementation, a standard BOM is first constructed. For each vehicle model and project, a detailed BOM compilation guide is developed to clarify how to combine factory drawings, maintenance records and actual disassembly analysis to derive the bill of materials; a version control function is established in the system to record the change history and difference comparison of the BOM in different periods and different repair processes.

[0057] Furthermore, a data reference system is built to realize the linkage between BOM and production planning system, and the forecast demand is automatically generated according to the progress of the repair process, so as to arrange procurement and production activities in advance; ensure that the BOM update will synchronously affect the material collection and feeding operation instructions, as well as the cost estimation module, to realize the dynamic update and accurate calculation of cost data.

[0058] In some possible implementations of the present invention, after establishing a standard BOM for the inspection and repair process of buses of different vehicle types under a specific repair process, the method further includes: Based on the standard BOM for the bus maintenance and repair process, a digital model for bus maintenance and repair process materials is established to achieve visual management of material information.

[0059] Specifically, this embodiment provides an implementation method for realizing visual management of material information, and realizes visual management of material information by establishing a digital model for passenger car maintenance and repair materials.

[0060] Step 300: dynamically adjust the standard BOM for the passenger car maintenance and repair process according to the current actual working condition of the vehicle and the current maintenance process, so as to generate a BOM list suitable for the current maintenance process.

[0061] In some possible implementations of the present invention, the step of dynamically adjusting the standard BOM for the passenger car maintenance process specifically includes: The material information in the digital model is updated according to the current actual working condition and the current repair process of the vehicle.

[0062] In a possible embodiment, an adaptive BOM generation module is set up to design an intelligent BOM generation system based on an AI algorithm. The system can dynamically generate a standard BOM list suitable for the current repair process based on factors such as the vehicle's actual operating conditions, mileage, and years of use, ensuring that the bill of materials covers all necessary parts replacements while avoiding excessive disassembly and waste.

[0063] In some possible implementations of the present invention, the step of dynamically adjusting the standard BOM for the passenger car maintenance process specifically further includes: According to the current actual working condition and current repair process of the vehicle, the material information in the digital model is revised through multi-person online collaboration; After the revision is completed, the latest version of the BOM is synchronously updated to an online visual mode, and the relevant data in the revision process is stored, including the revision date, the reviser, the reason for the revision and the specific content of the revision.

[0064] Specifically, this embodiment provides an implementation method for dynamically adjusting the standard BOM of the passenger car maintenance and repair process, and revising the material information in the digital model through multi-person online collaboration according to the current actual working condition of the vehicle and the current repair process.

[0065] In a possible implementation, after establishing the standard BOM for the passenger car maintenance process, the technical data is templated by standardizing the maintenance process technical template. Specifically, each field in the template, such as the process path, work center, and production version, is given a detailed description and instructions for use, including the meaning of the field, filling requirements, format specifications, etc. A regular inspection and technical personnel training mechanism is established to ensure that all relevant personnel can correctly maintain various technical data in accordance with unified standards.

[0066] Through the specific change maintenance process, refined management is achieved. Specifically, the specific steps for adjusting the after-sales material plan are clarified, such as the record of the reason for the change, the comparison of the material details before and after the change, the change approval level, etc. For the maintenance of engineering change data, a detailed change request form is designed, and the notification process before and after the change execution and the data update time limit are specified.

[0067] In some possible implementations of the present invention, the step of dynamically adjusting the standard BOM for the passenger car maintenance process specifically includes: Intelligently identify and predict material replacement needs based on the vehicle's current actual operating conditions and current repair schedule; Based on the identification and prediction results, the standard BOM for the passenger car maintenance process is adjusted in terms of materials; According to the material adjustment results, the change prediction of the linkage action corresponding to the material adjustment is carried out; According to the change prediction results, a multi-objective optimization strategy is adopted to optimize the maintenance schedule of the standard BOM of the passenger car maintenance schedule after material adjustment, and a BOM list suitable for the current maintenance schedule is obtained.

[0068] Specifically, this embodiment provides an implementation method for dynamically adjusting the standard BOM of the passenger car maintenance process, improving predictability and accuracy through intelligent prediction and dynamic updating of BOM; and forming a refined standard BOM template through multi-dimensional correlation analysis.

[0069] In a possible implementation, AI algorithms are used to analyze historical maintenance data, component wear models, and bus operating status monitoring information to achieve intelligent prediction of the bill of materials. The system can automatically adjust the BOM content based on real-time data, such as predicting the parts and quantities that will need to be replaced, thereby improving predictability and accuracy, and achieving intelligent prediction and dynamic update of the BOM.

[0070] In a possible embodiment, for multi-dimensional correlation analysis, BOM construction is not only based on factory drawings and disassembly conditions, but also combines multiple data sources such as environmental factors, vehicle usage frequency, and component fatigue life for correlation analysis to form a more refined and personalized standard BOM template to meet the bus maintenance needs in different regions, climatic conditions and operating modes.

[0071] In a possible embodiment, the display and dynamic adjustment of the standard BOM for the passenger car maintenance process can realize three-dimensional visualization and interactive BOM editing. Specifically, by using three-dimensional modeling and virtual reality technology, the passenger car structure and parts are displayed in a digital environment, so that technicians can intuitively view and edit the BOM, thereby improving the compilation efficiency and accuracy.

[0072] Furthermore, based on the above embodiments, real-time collaborative editing and version control can be achieved. Specifically, the function of multi-person online collaborative editing of BOM is realized, and each modification detail is tracked through an advanced version control system, including the time of change, operator, and content of change, etc., to ensure that cross-departmental and cross-regional teams can efficiently synchronize and trace the revision process.

[0073] In some possible implementations of the present invention, based on the change prediction results, a multi-objective optimization strategy is used to optimize the maintenance schedule of the standard BOM of the passenger car maintenance schedule after material adjustment, specifically including: Design a multi-objective genetic algorithm, taking into account multi-dimensional optimization objectives, including cost, time and quality; According to the change prediction result, the adaptability of the maintenance schedule of the passenger car maintenance schedule standard BOM after the material adjustment is evaluated through the fitness function in the multi-objective genetic algorithm; Based on the adaptability evaluation results, the dependency relationship between different maintenance tasks is analyzed using graph theory; Based on the dependency and the vehicle status data acquired in real time, the sequence and time arrangement of the maintenance and repair procedures are adjusted to form a new maintenance and repair procedure plan.

[0074] Specifically, this embodiment provides an implementation method for optimizing the maintenance program of the standard BOM of the passenger car maintenance program after material adjustment. By considering multi-dimensional optimization objectives, the sequence and schedule of the maintenance program are adjusted based on the dependencies between different maintenance tasks and real-time vehicle status data to form a new maintenance plan.

[0075] In a possible embodiment, an adaptive maintenance process optimization engine may be designed. By designing a set of adaptive maintenance process optimization algorithms, the algorithm can dynamically adjust the BOM according to the disassembly and inspection results during the actual maintenance process, thereby reducing ineffective work and material waste, and optimizing the overall maintenance cycle.

[0076] The above embodiment can be regarded as an implementation method of an adaptive repair process optimization process.

[0077] Specifically, for multi-objective optimization strategies: design a multi-objective genetic algorithm, consider multi-dimensional optimization objectives such as cost, time and quality, and use fitness function evaluation: (2) Among them, Fitness x ) indicates chromosome x The fitness score of f i (x) Indicates i A fitness function is used to evaluate the chromosome x performance in a particular aspect; ω i Indicates that it corresponds to f i (x) The weights are used to adjust the importance of different fitness functions in the total fitness.

[0078] For maintenance process dependency analysis, graph theory is used to analyze the dependency relationship between different maintenance tasks and optimize the maintenance sequence and time schedule.

[0079] Dynamic adjustments driven by real-time data are combined with real-time vehicle status data to dynamically adjust the maintenance plan.

[0080] In a possible embodiment, a simulated annealing algorithm may be used to introduce a simulated annealing algorithm for local search to improve the efficiency of solving the optimization problem. The probability formula for accepting a new solution is as follows: (3) in, P (Δ E ) represents the probability of accepting a new solution; Δ E It represents the energy difference between the new solution and the current solution, that is, the fitness difference; k represents the Boltzmann constant, which is used to normalize energy differences; T represents the temperature parameter, which controls the algorithm's search range and the likelihood of accepting new solutions.

[0081] Furthermore, by integrating the entire life cycle data of materials from procurement, warehousing, issuance to scrapping into the BOM management system, the status conversion and cost changes of each material at different stages of the maintenance process can be clearly seen, which facilitates the formulation of more scientific and reasonable material strategies and integrated life cycle management.

[0082] On this basis, compliance and standardization verification is also required. Specifically, by introducing industry standard libraries and regulatory databases, the system can automatically verify whether the materials in the BOM meet relevant technical specifications and safety requirements, thereby ensuring the legality and safety of bus maintenance work.

[0083] In a possible embodiment, for the management of the process technology change system, the efficiency of change implementation can be improved by measures such as change response time regulations and data change records and tracing.

[0084] Specifically, a strict time window can be established for change response time regulations. That is, after receiving the change notification, the business personnel must complete the modification and confirmation of the data in the system within the specified time (such as within 1 working day), and submit it to the relevant department for review in a timely manner; for the adjustment of production orders, a time limit is also set, emphasizing rapid response and coordination in the change process.

[0085] For data change recording and tracing, a change log function can be added to the system to record the initiator, time, content summary, change scope, and related BOM, order number and other key information of each change, which is convenient for later review and auditing.

[0086] Through the above-mentioned arrangement of the embodiment of the present invention, the creativity level of establishing the standard BOM for passenger car maintenance and repair procedures can be significantly improved, making it a more intelligent, precise and efficient management system.

[0087] In some possible embodiments of the present invention, Figure 2 As shown in the figure, the specific implementation process of establishing the standard BOM for passenger car maintenance process may include the following steps: Step 201: Data source integration and analysis: In this step, the system first integrates the bus factory drawings, previous maintenance records, parts supplier information, and real-time vehicle operation status monitoring data. Through big data analysis technology, these diversified data are deeply mined to identify the possible failure modes and corresponding parts replacement requirements of different models under specific maintenance procedures.

[0088] Step 202: Adaptive BOM generation module: In this step, an intelligent BOM generation system based on AI algorithm is designed. The system can dynamically generate a standard BOM list suitable for the current repair process based on factors such as the vehicle's actual operating conditions, mileage, and years of use, ensuring that the bill of materials covers all necessary parts replacements while avoiding excessive disassembly and waste.

[0089] Step 203: 3D model auxiliary construction: In this step, the 3D model can be used to assist in building the standard BOM for the bus maintenance process. Specifically, the 3D modeling software can be combined to build a digital model of the entire bus and its components to achieve visual management. The technicians can intuitively view the location, model, specifications and other detailed information of each component, and adjust the BOM content directly on the model by dragging and dropping, which improves the compilation efficiency and accuracy.

[0090] Step 204: Version control and change records: In this step, for version control and change records, an advanced version control system can be used to ensure that every modification to the BOM can be traced. Each BOM contains detailed records such as the revision date, revision person, revision reason and specific content, which is convenient for later audits and technology inheritance.

[0091] Step 205, collaborative editing and approval process: In a possible implementation, the collaborative editing and approval process, the system supports multiple people to collaboratively edit BOM online, and has a rigorous approval process design. Each person involved in the editing can see the latest BOM version, and only after approval and confirmation at each level, the new BOM list will be officially adopted and pushed to the relevant departments.

[0092] Step 206: Linking cost estimation and optimization functions: In this step, the standard BOM is not only used as the basis for maintenance work, but also closely linked to the cost estimation system. When the BOM changes, the system automatically recalculates the cost of related materials, labor costs, etc., which in turn affects the production plan, procurement budget and the evaluation of the overall economic benefits of the project. In addition, by continuously optimizing the BOM structure, reasonably selecting alternative parts or improving the process, the overall maintenance cost can be effectively reduced.

[0093] Step 207: Compliance inspection and early warning mechanism: In this step, the system has a built-in database of industry specifications and safety standards, and automatically performs compliance checks when generating and updating BOMs. Once non-compliant materials or configurations are found, the system will immediately issue an early warning to prevent illegal operations from occurring.

[0094] Step 208: Data interface and information transmission: In this step, by improving the data interface with other business systems, we ensure that BOM data can be transmitted to the purchasing, production and financial departments in a timely and accurate manner, thus forming an efficient information sharing and collaborative working environment within the enterprise.

[0095] In some possible implementations of the present invention, the maintenance data is transmitted and shared through information transmission, and the information transmission of the maintenance data includes two parts: a technology-business collaborative interface and a division of process route authority.

[0096] Specifically, for the technology-business collaboration interface, design and implement the data exchange interface between the technical department and the procurement department to ensure that material details are shared in real time and that data integrity is not damaged during the transmission process; specify the data collection cycle, organization format and process of importing into the information system, including error detection and data cleaning methods, to ensure data quality.

[0097] Regarding the division of authority for process routes, it is clear that technical personnel are responsible for the design, revision and release of process routes, and this information is synchronized into the system. At the same time, purchasing personnel only have the authority to enter supplier information; establish the logic for generating material requirement plans, such as summarizing the WBS levels at each level, and clarify the key parameters and logical judgment conditions required for automatic calculation by the system.

[0098] In some possible implementations of the present invention, the focus of project technical maintenance process management is the online maintenance of technical details. Specifically, an automatic filling function of information such as related projects, road bureaus, and maintenance processes is preset in the technical management system to reduce human errors. The logic of generating procurement requirements is designed to ensure the accuracy of the demand summary automatically generated based on the technical details, including the consistency of the selection principle of the fixed WBS, material number, quantity, train, maintenance process, and other information.

[0099] In some specific embodiments of the present invention, Figure 3 As shown, the present invention proposes a material data management optimization solution for passenger car maintenance and repair process, which mainly includes the following points: Step 301: Material master data management system construction: In this step, a comprehensive material management system is designed and implemented, covering application forms, change records, approval processes and operation manuals. Exclusive attribute labels are set for materials according to different evaluation types (such as regular new parts and old parts to be repaired), and status transition rules are established. Mobile applications are used to collect on-site information in real time, and materials are tracked and information matched through QR codes.

[0100] Step 302: Refined management of bill of materials: In this step, a detailed bill of materials template is developed during the bus disassembly stage to ensure that detailed information such as material code, name, specification model, and assessment type are recorded; verification rules are established, and the accuracy of the list is ensured by combining automatic system comparison and manual review.

[0101] Step 303: Establishment of standard BOM system: In this step, a detailed BOM guide is prepared for each vehicle model and project, and a bill of materials is generated based on factory drawings, maintenance history, and disassembly information. By implementing the version control function, historical changes and difference comparisons of the BOM are tracked and recorded. A data reference system is built to link the production planning system to predict material demand, and the material collection, material feeding guidance, and cost calculation modules are updated simultaneously.

[0102] Step 304: Technical template standardization and change maintenance process: In this step, unified standards and instructions are provided for technical data templates such as process paths and work centers; a regular inspection and technical training mechanism is established to ensure standardized maintenance of data; and specific steps for adjusting after-sales material plans are clarified, including record of change reasons, comparison of material details, and approval levels.

[0103] Step 305: Strengthen the management of the process technology change system: In this step, a strict time window is set to quickly respond to changes, requiring that data modification and review within the system be completed within a specified time. A change log function is added to record the entire change process for retrospective auditing.

[0104] Step 306: Information transmission and authority division: In this step, the data exchange interface between the technical department and the purchasing department is designed to realize real-time sharing of material details; standardize data collection, organization format and import process to ensure data quality; clarify the respective authority scope of technical personnel and purchasing personnel, such as process route design and supplier information entry.

[0105] Step 307: Intelligent project technical maintenance management: In this step, the automatic filling of related information is implemented in the technical management system to reduce the error rate; the purchase demand generation logic based on technical details is designed to ensure the accuracy of the summary; the material master data is closely integrated with the evaluation type, and different procurement strategies, inventory management and logistics distribution processes are set according to the evaluation type.

[0106] Through the above-mentioned settings, the embodiments of the present invention realize more refined management of materials, make the collected data more accurate, and improve the overall operating efficiency of the enterprise. Technology, as the basic task of guiding process management, is to combine the actual situation of the enterprise, apply modern management science theories and information technology such as lean management, plan, organize and control various process tasks, so that they can be coordinated and effectively carried out according to certain principles, procedures and methods. It is mainly used for basic data input of information-driven production business, which is the basis for production planning and procurement needs, and the premise for guiding logistics distribution and on-site production processes. It provides standards for financial management to ensure product quality, improve production efficiency, reduce environmental impact, and achieve coordinated development of economic and social benefits.

[0107] In some specific embodiments of the present invention, Figure 4 As shown, another implementation method for the material management method of the passenger car maintenance process is provided, which mainly includes the following steps: Step 401, material data reduction based on repair process; In this step, by reconstructing the specific management of material master data, the application process of material master data creation, modification, disabling, and expansion is systematically managed. Due to the high complexity of bus maintenance models and incomplete original technical data, more reference is needed to the actual situation of the current vehicle. When the vehicle is disassembled, the pictures, images, and material information of the current vehicle are collected. The material attributes of the bus maintenance (such as evaluation type: "conventional new parts", "old parts to be repaired", "repaired old parts", "repair process 1", "repair process 2", "repair process 3", "repair process 4", "repair process 5", inventory parts, WBS vehicles, factories, inventory locations, quantities, workstations, factory-level routes, etc.) are formulated, and the material list is formed in the system through system production or import, which serves as the basis for material procurement and production operations.

[0108] Step 402, establishing a standard BOM for the passenger car maintenance process; In this step, standard details are established for different types of buses and different projects for maintenance. Based on the dimensions of maintenance process, project, and road bureau, combined with the original factory drawings and previous maintenance records, a standard BOM is established as a reference to prevent omissions in the bill of materials during disassembly. At the same time, the production cycle can be shortened to facilitate advance forecasting, guide production planning, guide material collection and feeding, and guide standard cost estimation, providing a standard comparison basis for financial management and control.

[0109] Step 403, standardize the maintenance process technical template; In this step, the specification of the maintenance process technical template should focus on maintaining close contact with technical personnel, constantly listening to the feedback of technical personnel, standardizing the management template of bus maintenance technical data, and maintaining technical data such as technical details, BOM, process path, work center, production version, etc.; maintenance of project after-sales material plan and corresponding tables of vehicle types, major components, processes, teams, workstations, and stations; maintenance of engineering change data; maintenance of technical details of purchased parts required for self-made parts in after-sales materials and sales accessories; maintenance of custom field attributes of WBS elements; maintenance of after-sales and quality loss related networks, operations, and outbound delivery orders; maintenance of project production delivery components. All solidified templates support rapid maintenance and rapid modification, improving data maintenance and transmission efficiency.

[0110] Step 404: Process Technology Change System Management: During the production process, if the material master data and technical data need to be adjusted due to engineering changes, plan changes, etc., the business personnel should complete the system data change work within 1 working day in principle. The production order after issuance is maintained by the project department. If the production order needs to be adjusted due to engineering changes or plan changes, the project department should complete the order adjustment work within 1 working day in principle. Technical notifications involving engineering changes must clearly specify the modification scope of BOM and order, modification data information and other necessary field information.

[0111] Step 405: Information transmission of repair process data: In this step, we will establish a seamless integrated collaborative model between technology and business, and share technical details, so as to achieve real-time synchronization with the purchasing department. The technical data will be maintained by the technical department of the business unit. After data collection is completed, it will be sorted according to the templates corresponding to each data and imported into the information system. In the maintenance mode, normal and secondary details can be created without mandatory control points, but engineering change numbers must be created for supplementary materials, additions and modifications, and red-letter details. For the process routes in the technical details, the system must adopt a strategy of separating the powers of technical personnel and purchasing personnel. The technical personnel will uniformly define the process routes, and the purchasing personnel will uniformly enter the supplier names of the process routes into the system. Material requirement planning occurs at the lowest level WBS, and can be summarized upward step by step according to the level of the WBS, so that cost analysis can be achieved by project, business unit, WBS and other dimensions.

[0112] Step 406: Project technical revision management: In this step, the technical department automatically confirms information such as project, road bureau, and repair schedule when maintaining the technical details online. The business process must be forced to automatically form procurement requirements based on the technical details issued by the technical department. The demand summary method is adopted. When summarizing the requirements, the fixed WBS is used for summary calculation. In addition, the production type is distinguished during import, and the material number, quantity, vehicle, repair schedule and other information are clearly specified. In different repair processes, there are five valuation types: old parts repair process 1, 2, 3, 4, and 5. The material master data adds valuation type-level data. Each repair process starts from the material master data, which solves the problem of repeated coding of a material due to different repair processes requiring different codes. With the distinction of basic data, in terms of logistics business management, material requirement planning can select different valuation types to represent different repair processes. The current situation of unclear repair processes in the business process is completely solved. The execution of procurement business based on material requirement planning is clearer, and it is clear at a glance which repair process the business belongs to. Warehousing and logistics management manages materials of different repair processes separately, meeting all aspects of the requirements of refined management of material inventory and achieving consistency between the consumption cost and the procurement cost. In terms of financial cost aggregation, materials of different repair processes and different valuation types can be evaluated separately, meeting the needs of refined management of cost aggregation.

[0113] In some specific implementation schemes of the present invention, this scheme provides a material management device for a bus maintenance process. The material management device for a bus maintenance process provided by the present invention is described below. The material management device for a bus maintenance process described below and the material management method for a bus maintenance process described above can be referenced to each other.

[0114] Figure 5 Schematic diagram of the structure of the material management device for passenger car maintenance process provided by the present invention. Figure 5 As shown, the device comprises: An acquisition module 51 is used to acquire possible failure modes and corresponding material replacement requirements of different vehicle models under a specific repair process; A standard BOM building module 52 is used to establish a standard BOM for the maintenance and repair process of buses of different models under a specific maintenance process according to the failure mode and the corresponding material replacement requirements; The dynamic adjustment module 53 is used to dynamically adjust the standard BOM of the passenger car maintenance and repair process according to the current actual working condition of the vehicle and the current maintenance process, so as to generate a BOM list suitable for the current maintenance process.

[0115] The implementation principle and beneficial effects of the material management device for the passenger car maintenance process provided by the embodiment of the present invention are similar to the implementation principle and beneficial effects of the material management method for the passenger car maintenance process shown in the above embodiment. Please refer to the implementation principle and beneficial effects of the material management method for the passenger car maintenance process shown in the above embodiment, and no further details will be given here.

[0116] In some specific embodiments of the present invention, the present solution provides a material management system for a bus maintenance process, comprising: a memory and one or more processors connected to the memory, the memory storing a computer program, the processor being used to execute the computer program to implement a material management method for a bus maintenance process as described in any one of the above, the method comprising: obtaining possible failure modes and corresponding material replacement requirements for different vehicle models under a specific maintenance process; establishing a standard BOM for bus maintenance processes for different vehicle models under a specific maintenance process based on the failure modes and corresponding material replacement requirements; dynamically adjusting the standard BOM for bus maintenance processes based on the current actual working conditions of the vehicle and the current maintenance process to generate a BOM list suitable for the current maintenance process.

[0117] In some specific embodiments of the present invention, the present solution provides a rail vehicle, including the material management system for passenger car maintenance and repair as described above.

[0118] Figure 6 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 6 As shown, the electronic device may include: a processor 610, a communications interface 620, a memory 630 and a communication bus 640, wherein the processor 610, the communications interface 620 and the memory 630 communicate with each other through the communication bus 640. The processor 610 may call the logic instructions in the memory 630 to execute a material management method for a bus overhaul process, the method comprising: obtaining possible failure modes and corresponding material replacement requirements of different vehicle models under a specific repair process; establishing a bus overhaul process standard BOM for different vehicle models under a specific repair process according to the failure modes and corresponding material replacement requirements; dynamically adjusting the bus overhaul process standard BOM according to the current actual working condition of the vehicle and the current repair process to generate a BOM list suitable for the current repair process.

[0119] In addition, the logic instructions in the above-mentioned memory 630 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0120] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the material management method for the bus maintenance process provided by the above methods. The method includes: obtaining the possible failure modes and corresponding material replacement requirements of different vehicle models under a specific maintenance process; establishing a standard BOM for the bus maintenance process of different vehicle models under a specific maintenance process based on the failure modes and corresponding material replacement requirements; and dynamically adjusting the standard BOM for the bus maintenance process based on the current actual working conditions of the vehicle and the current maintenance process to generate a BOM list suitable for the current maintenance process.

[0121] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the material management method for bus maintenance and repair processes provided by the above-mentioned methods, the method comprising: obtaining possible failure modes and corresponding material replacement requirements for different vehicle models under a specific repair process; establishing a standard BOM for bus maintenance and repair processes for different vehicle models under a specific repair process based on the failure modes and corresponding material replacement requirements; and dynamically adjusting the standard BOM for bus maintenance and repair processes based on the current actual working conditions of the vehicle and the current repair process to generate a BOM list suitable for the current repair process.

[0122] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0123] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A material management method for passenger car maintenance process, characterized in that: include: Obtain the possible failure modes and corresponding material replacement requirements of different models under specific repair procedures; According to the failure modes and corresponding material replacement requirements, a standard BOM for the maintenance and repair process of buses of different models under specific maintenance processes is established; According to the current actual working condition of the vehicle and the current maintenance schedule, the standard BOM for the passenger car maintenance schedule is dynamically adjusted to generate a BOM list suitable for the current maintenance schedule.

2. The material management method for passenger car maintenance process according to claim 1 is characterized in that: The steps to obtain the possible failure modes and corresponding material replacement requirements of different vehicle models under specific repair procedures include: Use transfer learning strategy, take the pre-trained network model as a starting point, and fine-tune the material recognition task for different models under specific repair processes; Through the fine-tuned network model, the possible failure modes and corresponding material replacement requirements of different vehicle models under specific maintenance procedures are obtained.

3. The material management method for passenger car maintenance process according to claim 2 is characterized in that: The steps to fine-tune the material recognition task for different models under specific repair processes include: Obtain material data for different models under any initial repair process; Extracting visual recognition features and structural features of the material data; Using feature fusion technology to fuse the visual recognition feature with the structural feature to obtain a feature fusion result; Based on the feature fusion results, the Isolation Forest algorithm is used to calculate the anomaly of each material to obtain the anomaly score of each material; The parameters of the network model are fine-tuned according to the feature fusion result and the anomaly score.

4. The material management method for passenger car maintenance process according to any one of claims 1 to 3, characterized in that: Before the step of establishing a standard BOM for the maintenance and repair process of buses of different models under a specific maintenance process according to the failure mode and the corresponding material replacement requirements, the method further includes: Build a material master data management system for different maintenance processes; Setting exclusive fields and attribute labels for materials of different repair process evaluation types in the material master data management system, and defining state transition rules for the materials in their life cycle; Formulate a template for filling out the bill of materials and verification rules for the bill of materials of the material master data management system during the bus disassembly stage.

5. The material management method for passenger car maintenance process according to claim 4 is characterized in that: According to the failure mode and the material replacement requirement, the steps of obtaining the standard BOM of the bus maintenance process for different models under a specific maintenance process specifically include: updating the material master data management system according to the failure mode and the corresponding material replacement requirements; Through the updated material master data management system, standard BOMs for bus maintenance procedures for different models under specific maintenance procedures can be obtained.

6. The material management method for passenger car maintenance process according to claim 1 is characterized in that: After establishing the standard BOM for the inspection and repair process of buses of different models under the specific repair process, the method further includes: Based on the standard BOM for the bus maintenance and repair process, a digital model for bus maintenance and repair process materials is established to achieve visual management of material information.

7. The material management method for passenger car maintenance process according to claim 6 is characterized in that: The steps of dynamically adjusting the standard BOM of the passenger car maintenance process specifically include: The material information in the digital model is updated according to the current actual working condition and the current repair process of the vehicle.

8. The material management method for passenger car maintenance process according to claim 6 is characterized in that: The step of dynamically adjusting the standard BOM of the passenger car maintenance process specifically includes: According to the current actual working condition and current repair process of the vehicle, the material information in the digital model is revised through multi-person online collaboration; After the revision is completed, the latest version of the BOM is synchronously updated to an online visual mode, and the relevant data in the revision process is stored, including the revision date, the reviser, the reason for the revision and the specific content of the revision.

9. The material management method for passenger car maintenance process according to claim 1 is characterized in that: The steps of dynamically adjusting the standard BOM of the passenger car maintenance process specifically include: Intelligently identify and predict material replacement needs based on the vehicle's current actual operating conditions and current repair schedule; Based on the identification and prediction results, the standard BOM for the passenger car maintenance process is adjusted in terms of materials; According to the material adjustment results, the change prediction of the linkage action corresponding to the material adjustment is carried out; According to the change prediction results, a multi-objective optimization strategy is adopted to optimize the maintenance schedule of the standard BOM of the passenger car maintenance schedule after material adjustment, and a BOM list suitable for the current maintenance schedule is obtained.

10. The material management method for passenger car maintenance process according to claim 9 is characterized in that: According to the change prediction results, a multi-objective optimization strategy is used to optimize the maintenance schedule of the standard BOM of the passenger car maintenance schedule after material adjustment. The specific steps include: Design a multi-objective genetic algorithm, taking into account multi-dimensional optimization objectives, including cost, time and quality; According to the change prediction result, the adaptability of the maintenance schedule of the passenger car maintenance schedule standard BOM after the material adjustment is evaluated through the fitness function in the multi-objective genetic algorithm; Based on the adaptability evaluation results, the dependency relationship between different maintenance tasks is analyzed using graph theory; Based on the dependency and the vehicle status data acquired in real time, the sequence and time arrangement of the maintenance and repair procedures are adjusted to form a new maintenance and repair procedure plan.

11. A material management device for passenger car maintenance process, characterized in that: include: The acquisition module is used to obtain the possible failure modes and corresponding material replacement requirements of different vehicle models under specific repair procedures; A standard BOM building module is used to establish a standard BOM for the maintenance and repair process of buses of different models under a specific maintenance process according to the failure mode and the corresponding material replacement requirements; The dynamic adjustment module is used to dynamically adjust the standard BOM of the passenger car maintenance and repair process according to the current actual working condition of the vehicle and the current maintenance process, so as to generate a BOM list suitable for the current maintenance process.

12. A material management system for passenger car maintenance, characterized in that: include: A memory and one or more processors connected to the memory, the memory storing a computer program, and the processor being used to execute the computer program to implement the material management method for passenger car maintenance process as described in any one of claims 1 to 10.

13. A rail vehicle, characterized in that: Including the material management system for passenger car maintenance and repair process as described in claim 12.

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