CN111898165A - Technical parameter change tracing method and system in PDM system - Google Patents
Technical parameter change tracing method and system in PDM system Download PDFInfo
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Abstract
The invention relates to the field of product data management, and provides a technical parameter change tracing method and a system in a PDM system, wherein the method comprises the steps of acquiring original technical parameter data in the PDM system to generate a first verification code, acquiring changed technical parameter data in the PDM system, generating a second verification code according to the changed technical parameter data and the first verification code, sequentially acquiring N-time changed technical parameter data, generating an N-th verification code according to the N-time changed technical parameter and the N-1-th verification code, and storing the N-time changed technical parameter data and the N-th verification code in a local storage unit; and then all technical parameter data and verification codes are respectively copied and stored on M devices of the product collaborative design, a series of task adjustment venation can be traced according to data in a block chain, and mistakes or other malicious data changes are prevented, so that data tampering is prevented, repeated design problems are reduced, and the product collaborative design efficiency is improved.
Description
Technical Field
The invention relates to the field of product data management, in particular to a technical parameter change tracing method and system in a PDM system.
Background
The PDM system (Product Data Management, PDM) manages all information related to products, including part information, configuration, documents, CAD files, structures, authority information and the like, and all processes related to the products, including process definition and Management, enterprises implement Management of the PDM system, can improve production efficiency, is beneficial to managing the whole life cycle of the products, enhances efficient utilization of the documents, drawings and Data, standardizes the work flow, and has wide application in the Product Data Management process of the enterprises.
US patent US10614177B2 discloses a system, method and program for a PDM system, the system comprising: one or more digital production facilities for manufacturing three-dimensional objects; and a digital production management platform comprising one or more processors and at least one non-transitory computer readable memory, wherein the digital production management platform is configured to: receiving a first data stream comprising an object design file, the object design file comprising a digital signature embedded in the object design file, wherein the digital signature comprises at least one of a production date and an identification code; confirming that production is authorized based on the digital signature; securely streaming a second data stream to at least one of the one or more digital production devices, the second data stream comprising a first portion of the received object design file, wherein the first portion of the received object design file comprises production instructions; securely streaming a third data stream to at least one of the one or more digital production devices, the third data stream including a second portion of the received object design file, wherein the second portion of the object design file is streamed from the one or more digital production devices upon detecting that the first portion of the object design file is absent from the at least one or more digital production devices or upon receiving confirmation to delete the first portion of the object design file; and receiving a feedback data stream comprising at least digital production status data from the one or more digital production devices; a quality assurance platform configured to: determining whether the manufactured part was manufactured correctly by comparing the feedback data stream to expected feedback data, wherein the expected feedback data is generated from at least one of historical data, test data, and machine learning; and providing assurance that the manufactured part is properly produced when it is determined that the manufactured part is produced.
In the current enterprise practical application PDM system, some technical parameter changes usually occur in product design, and the technical parameter changes often bring about adjustment of other nodes of a series of product designs, and for adjustment of related nodes or other changes of interference technical parameters which may occur due to the change of a certain technical parameter, in the execution process of the PDM system, after engineering change occurs or after a product design project is finished, it is often difficult to determine a series of task adjustment contexts originally caused by the engineering change, so that the changes of other nodes and other technical parameters causing changes due to the engineering change cannot be effectively sourced, so that real and original data of each collaborative design link is unclear, further, repeated design problems occur frequently, and the collaborative design efficiency of products is affected.
Disclosure of Invention
Long-term practice shows that various engineering changes are inevitably generated in the product design process in the PDM system, and after the engineering changes occur or after a product design project is finished, a series of task adjustment contexts originally caused by the engineering changes are often difficult to determine, other node variation caused by the engineering changes and other changed technical parameters cannot be effectively traced, and sometimes, due to mistake or other malicious data changes and data tampering, real original data of each collaborative design link is unclear, so that repeated design problems occur frequently, and the collaborative design efficiency of the product is influenced.
In view of the above, the present invention is directed to a method for tracing technical parameter change in a PDM system, so as to solve the problem that it is difficult to determine a series of task adjustment contexts originally caused by engineering change after the engineering change occurs or after a product design project is finished in the PDM system, and it is not possible to effectively trace the changes of other nodes and other technical parameters caused by the engineering change, thereby causing unclear real original data of each collaborative design link, and the method for tracing technical parameter change in the PDM system includes:
step S1, acquiring original technical parameter data in the PDM system, and generating a first verification code, wherein the first verification code corresponds to the original technical parameter data one to one;
step S2, acquiring changed technical parameter data in the PDM system, generating a second verification code according to the changed technical parameter data and the first verification code, sequentially acquiring Nth changed technical parameter data, generating an Nth verification code according to the Nth changed technical parameter and the (N-1) th verification code, and storing the Nth changed technical parameter data and the Nth verification code in a local storage unit, wherein N is a natural number greater than 1;
step S3, copying and storing all technical parameter data and verification codes on M devices in product collaborative design respectively, and storing the backup address and verification codes of returned data into a block chain private chain module, wherein M is a natural number greater than 1;
step S4, changing technical parameter data of a design node in the PDM system, generating local Kth changed technical parameter data and a Kth verification code, comparing and verifying the Kth verification code with a verification code obtained in a block chain private chain module, and copying and storing the generated local Kth changed technical parameter data and the generated Kth verification code on M devices of product collaborative design if a comparison result passes; and if the comparison fails, restoring the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module, wherein K is a natural number greater than 1.
Preferably, in step S3, the backup address and the verification code of the data in the blockchain private chain module are anchored to the blockchain public chain module by the anchoring unit.
Preferably, in step S1, the technical parameter data in the PDM system includes text data, image data, and XML structured data.
Preferably, the changed technical parameter data includes changed design process node information data.
Preferably, the first verification code, the second verification code and the Nth verification code are Hash function values.
The invention also provides a system for executing the technical parameter change tracing method in the PDM system, which comprises the following steps:
the system comprises an acquisition module, a verification module and a verification module, wherein the acquisition module is used for acquiring original technical parameter data in a PDM system and generating a first verification code, and the first verification code corresponds to the original technical parameter data one to one;
the calculation storage module is used for acquiring changed technical parameter data in the PDM system, generating a second verification code according to the changed technical parameter data and the first verification code, sequentially acquiring N-time changed technical parameter data, generating an N-th verification code according to the N-time changed technical parameter and the N-1-th verification code, and storing the N-time changed technical parameter data and the N-th verification code in a local storage unit, wherein N is a natural number greater than 1;
the data backup module is used for respectively copying and storing all technical parameter data and verification codes on M devices in product collaborative design, and storing a backup address and a verification code of returned data into the block chain private chain module, wherein M is a natural number greater than 1;
the data verification recovery module is used for generating technical parameter data change on a design node in the PDM system, generating local K-th changed technical parameter data and a K-th verification code, comparing and verifying the K-th verification code with the verification code obtained in the block chain private chain module, and copying and storing the generated local K-th changed technical parameter data and the K-th verification code on M devices of product collaborative design if the comparison result passes; and if the comparison fails, restoring the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module, wherein K is a natural number greater than 1.
Preferably, the calculation storage module includes a calculation unit and a local storage unit, and the calculation unit is configured to generate the second verification code by acquiring the changed technical parameter data and the first verification code, and sequentially generate the nth verification code by acquiring the nth changed technical parameter data and the nth-1 verification code; and the local storage unit is used for storing the technical parameter data after the Nth change and the Nth verification code.
Preferably, the data verification and recovery module comprises a verification unit and a data recovery unit, the verification unit is configured to compare the generated kth verification code with the verification code obtained in the block chain private chain module for verification, the verification result includes pass and fail, and when the verification passes, the data backup module copies and stores the generated local data and the verification code on M devices cooperatively designed for the product; when the verification fails, triggering a data recovery unit to recover the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module; and the data recovery unit is used for receiving the signal which is sent by the verification unit and fails to pass the verification, and recovering the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to the local calculation storage module.
Preferably, the data backup module further includes an anchoring unit and a block chain public chain module, and is configured to anchor a backup address and a verification code of data in the block chain private chain module to the block chain public chain module; and the block chain public chain module is used for storing the backup address and the verification code of the data in the block chain private chain module.
According to another aspect of the embodiments of the present invention, there is provided a storage medium, the storage medium including a stored program, wherein when the program runs, a device in which the storage medium is located is controlled to execute the above method.
According to the technical parameter change tracing method in the PDM system, the method comprises the steps of obtaining original technical parameter data in the PDM system to generate a first verification code, obtaining changed technical parameter data in the PDM system, generating a second verification code according to the changed technical parameter data and the first verification code, sequentially obtaining technical parameter data after N times of change, generating an Nth verification code according to the technical parameter after N times of change and the verification code for the N-1 st time, and storing the technical parameter data after N times of change and the Nth verification code in a local storage unit; respectively copying and storing all technical parameter data and verification codes on M devices of product collaborative design, and storing the backup address and verification code of the returned data into a block chain private chain module; the method comprises the steps that technical parameter data change occurs in a design node in a PDM system, local Kth changed technical parameter data and a Kth verification code are generated, the Kth verification code is compared with a verification code obtained in a block chain private chain module for verification, and if the comparison result passes, the generated local Kth changed technical parameter data and the Kth verification code are copied and stored on M devices of product collaborative design; and if the comparison fails, restoring the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module. After the technical parameter data caused by the engineering change are changed, a series of task adjustment venation can be traced according to the data in the block chain, the variable quantity of other nodes caused by the engineering change and other changed technical parameters can be effectively traced, the real original data of each collaborative design link can be restored, the repeated design problem is reduced, and the product collaborative design efficiency is improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a technical parameter change tracing method in a PDM system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an embodiment of a system for performing a method for tracing technical parameter change in a PDM system according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," "third," and the like in the description and in the claims, and in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The method aims to solve the problems that after engineering change occurs or product design projects are finished in a PDM system, a series of task adjustment veins caused by the engineering change are difficult to determine, other node variable quantities caused by the engineering change and other changed technical parameters cannot be traced effectively, and real original data of each collaborative design link is unclear. As shown in fig. 1, the present invention provides a technical parameter change tracing method in a PDM system, and as shown in fig. 1, a flow chart of the technical parameter change tracing method in the PDM system according to an embodiment of the present invention, where the technical parameter change tracing method in the PDM system includes:
step S1, acquiring original technical parameter data in the PDM system, and generating a first verification code, wherein the first verification code corresponds to the original technical parameter data one to one;
step S2, acquiring changed technical parameter data in the PDM system, generating a second verification code according to the changed technical parameter data and the first verification code, sequentially acquiring Nth changed technical parameter data, generating an Nth verification code according to the Nth changed technical parameter and the (N-1) th verification code, and storing the Nth changed technical parameter data and the Nth verification code in a local storage unit, wherein N is a natural number greater than 1;
step S3, copying and storing all technical parameter data and verification codes on M devices in product collaborative design respectively, and storing the backup address and verification codes of returned data into a block chain private chain module, wherein M is a natural number greater than 1;
step S4, changing technical parameter data of a design node in the PDM system, generating local Kth changed technical parameter data and a Kth verification code, comparing and verifying the Kth verification code with a verification code obtained in a block chain private chain module, and copying and storing the generated local Kth changed technical parameter data and the generated Kth verification code on M devices of product collaborative design if a comparison result passes; and if the comparison fails, restoring the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module, wherein K is a natural number greater than 1.
The method comprises the steps of generating a first verification code by acquiring original technical parameter data in a PDM system, generating a second verification code according to the changed technical parameter data and the first verification code after acquiring changed technical parameter data in the PDM system, sequentially acquiring N-time changed technical parameter data, generating an N-th verification code according to the N-time changed technical parameter and the N-1-th verification code, and storing the N-time changed technical parameter data and the N-th verification code in a local storage unit; respectively copying and storing all technical parameter data and verification codes on M devices of product collaborative design, and storing the backup address and verification code of the returned data into a block chain private chain module; the method comprises the steps that technical parameter data change occurs in a design node in a PDM system, local Kth changed technical parameter data and a Kth verification code are generated, the Kth verification code is compared with a verification code obtained in a block chain private chain module for verification, and if the comparison result passes, the generated local Kth changed technical parameter data and the Kth verification code are copied and stored on M devices of product collaborative design; and if the comparison fails, restoring the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module. After technical parameter data caused by the engineering change are changed, a series of task adjustment venation can be traced according to the data in the block chain, mistake or other malicious data changes are prevented, data tampering is prevented, other node variable quantities caused by the engineering change and other changed technical parameters can be effectively traced, real original data of each collaborative design link can be restored, repeated design problems are reduced, and product collaborative design efficiency is improved.
In order to make systematic damage or loss error of the program change data in the blockchain private chain module, in a preferred case of the present invention, in step S3, the backup address and the verification code of the data in the blockchain private chain module are anchored to the blockchain public chain module by the anchoring unit. For example, when building a block chain private chain module (i.e., a private chain), the ether house private chain can be built by modifying the configuration of the ether house created block, the mining mode, and the like. The manner of mining of the ether departments can be modified to PoA (of-Authority), so that authorized nodes can be designated in the system to be responsible for generating blocks according to conditions such as participation departments and the like.
In order to obtain the technical parameter data types for possible engineering changes in the PDM system and better accommodate various file types, in a preferred case of the present invention, in step S1, the technical parameter data in the PDM system includes text data, image data, and XML structured data.
In order to obtain the node information related to the technical parameter data and better locate and search the information corresponding to the design process node in the source tracing stage, the changed technical parameter data comprises the changed design process node information data under the preferable condition of the invention.
For example, the design process node information data at least includes a node number, a product number of a design product, a reason for generating a change, and approval information, and after the block chain private chain module finds a backup address of corresponding technical parameter data, the technical parameter data of a certain change in the backup address can be retrieved and looked up.
In order to make the verification code generated in the block chain not be falsifiable, under the preferred condition of the present invention, the first verification code, the second verification code and the nth verification code are Hash function values.
For example, any piece of information of technical parameter data in the PDM system only has a unique Hash value.
The present invention also discloses a system for executing the technical parameter change tracing method in the PDM system, as shown in fig. 2, the system includes:
the system comprises an acquisition module, a verification module and a verification module, wherein the acquisition module is used for acquiring original technical parameter data in a PDM system and generating a first verification code, and the first verification code corresponds to the original technical parameter data one to one;
the calculation storage module is used for acquiring changed technical parameter data in the PDM system, generating a second verification code according to the changed technical parameter data and the first verification code, sequentially acquiring N-time changed technical parameter data, generating an N-th verification code according to the N-time changed technical parameter and the N-1-th verification code, and storing the N-time changed technical parameter data and the N-th verification code in a local storage unit, wherein N is a natural number greater than 1;
the data backup module is used for respectively copying and storing all technical parameter data and verification codes on M devices in product collaborative design, and storing a backup address and a verification code of returned data into the block chain private chain module, wherein M is a natural number greater than 1;
the data verification recovery module is used for generating technical parameter data change on a design node in the PDM system, generating local K-th changed technical parameter data and a K-th verification code, comparing and verifying the K-th verification code with the verification code obtained in the block chain private chain module, and copying and storing the generated local K-th changed technical parameter data and the K-th verification code on M devices of product collaborative design if the comparison result passes; and if the comparison fails, restoring the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module, wherein K is a natural number greater than 1.
The system acquires original technical parameter data in a PDM system through an acquisition module to generate a first verification code; after acquiring changed technical parameter data in the PDM system, the calculation storage module generates a second verification code according to the changed technical parameter data and the first verification code, sequentially acquires the technical parameter data after the Nth change, generates an Nth verification code according to the technical parameter after the Nth change and the verification code of the (N-1) th time, and stores the technical parameter data after the Nth change and the Nth verification code in a local storage unit; the data backup module respectively copies and stores all technical parameter data and verification codes on M devices of product collaborative design, and returns the backup address and verification codes of the data to be stored in the block chain private chain module; the design node in the PDM system generates technical parameter data change and generates local Kth changed technical parameter data and a Kth verification code, the data verification recovery module compares and verifies the Kth verification code with the verification code obtained in the block chain private chain module, and if the comparison result passes, the generated local Kth changed technical parameter data and the Kth verification code are copied and stored on M devices of product collaborative design; and if the comparison fails, restoring the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module. After technical parameter data caused by the engineering change are changed, a series of task adjustment venation can be traced according to the data in the block chain, mistake or other malicious data changes are prevented, data tampering is prevented, other node variable quantities caused by the engineering change and other changed technical parameters can be effectively traced, real original data of each collaborative design link can be restored, repeated design problems are reduced, and product collaborative design efficiency is improved.
Because the product design process in the PDM system is carried out in a distributed allopatric multi-center mode, aiming at the product collaborative design process, not only the technical parameter data needs to be locally stored, but also the process data and the result data need to be further stored, in order to better store the technical parameter data locally, under the preferable condition of the invention, the calculation storage module comprises a calculation unit and a local storage unit, the calculation unit is used for generating the second verification code by acquiring the changed technical parameter data and the first verification code, and sequentially generating the acquired N verification code by sequentially combining the N-th changed technical parameter data and the N-1-th verification code; and the local storage unit is used for storing the technical parameter data after the Nth change and the Nth verification code.
For example, the local storage unit can use a relational database such as MySQL, SQL Server, etc., and thus can be preferably used as a storage carrier for local data.
In order to effectively prevent technical parameter data change of product design in a PDM system caused by mistake or other malice and prevent data tampering, in the preferred case of the invention, the data verification recovery module comprises a verification unit and a data recovery unit, the verification unit is used for comparing and verifying a generated Kth verification code with a verification code obtained in a block chain private chain module, a verification result comprises pass and fail, and when the verification passes, the generated local data and the verification code are copied and stored on M devices cooperatively designed with the product through a data backup module; when the verification fails, triggering a data recovery unit to recover the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module; and the data recovery unit is used for receiving the signal which is sent by the verification unit and fails to pass the verification, and recovering the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to the local calculation storage module.
In order to better enable the program change data in the blockchain private chain module to be systematically damaged or lost and have errors, in a preferred case of the present invention, the data backup module further includes an anchoring unit and a blockchain public chain module, for anchoring the backup address and the verification code of the data in the blockchain private chain module to the blockchain public chain module; and the block chain public chain module is used for storing the backup address and the verification code of the data in the block chain private chain module. For example, when building a block chain private chain module (i.e., a private chain), the ether house private chain can be built by modifying the configuration of the ether house created block, the mining mode, and the like.
The embodiment of the invention also provides a storage medium, which comprises a stored program, wherein when the program runs, the device where the storage medium is located is controlled to execute the method.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus can be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a mobile terminal, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A technical parameter change tracing method in a PDM system is characterized by comprising the following steps:
step S1, acquiring original technical parameter data in the PDM system, and generating a first verification code, wherein the first verification code corresponds to the original technical parameter data one to one;
step S2, acquiring changed technical parameter data in the PDM system, generating a second verification code according to the changed technical parameter data and the first verification code, sequentially acquiring Nth changed technical parameter data, generating an Nth verification code according to the Nth changed technical parameter and the (N-1) th verification code, and storing the Nth changed technical parameter data and the Nth verification code in a local storage unit, wherein N is a natural number greater than 1;
step S3, copying and storing all technical parameter data and verification codes on M devices in product collaborative design respectively, and storing the backup address and verification codes of returned data into a block chain private chain module, wherein M is a natural number greater than 1;
step S4, changing technical parameter data of a design node in the PDM system, generating local Kth changed technical parameter data and a Kth verification code, comparing and verifying the Kth verification code with a verification code obtained in a block chain private chain module, and copying and storing the generated local Kth changed technical parameter data and the generated Kth verification code on M devices of product collaborative design if a comparison result passes; and if the comparison fails, restoring the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module, wherein K is a natural number greater than 1.
2. The method for tracing technical parameter change in a PDM system as claimed in claim 1, wherein in step S3, the backup address and the verification code of the data in the blockchain private chain module are anchored to the blockchain public chain module by an anchoring unit.
3. The method for tracing technical parameter change in a PDM system as claimed in claim 1, wherein in step S1, the technical parameter data in the PDM system includes text data, image data, and XML structured data.
4. The method as claimed in claim 1, wherein the changed technical parameter data includes changed design process node information data.
5. The method for tracing technical parameter change in a PDM system as claimed in any of claims 1-4, wherein the first verification code, the second verification code, and the nth verification code are Hash function values.
6. A system, characterized in that the system comprises:
the system comprises an acquisition module, a verification module and a verification module, wherein the acquisition module is used for acquiring original technical parameter data in a PDM system and generating a first verification code, and the first verification code corresponds to the original technical parameter data one to one;
the calculation storage module is used for acquiring changed technical parameter data in the PDM system, generating a second verification code according to the changed technical parameter data and the first verification code, sequentially acquiring N-time changed technical parameter data, generating an N-th verification code according to the N-time changed technical parameter and the N-1-th verification code, and storing the N-time changed technical parameter data and the N-th verification code in a local storage unit, wherein N is a natural number greater than 1;
the data backup module is used for respectively copying and storing all technical parameter data and verification codes on M devices in product collaborative design, and storing a backup address and a verification code of returned data into the block chain private chain module, wherein M is a natural number greater than 1;
the data verification recovery module is used for generating technical parameter data change on a design node in the PDM system, generating local K-th changed technical parameter data and a K-th verification code, comparing and verifying the K-th verification code with the verification code obtained in the block chain private chain module, and copying and storing the generated local K-th changed technical parameter data and the K-th verification code on M devices of product collaborative design if the comparison result passes; and if the comparison fails, restoring the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module, wherein K is a natural number greater than 1.
7. The system according to claim 6, wherein the calculation storage module comprises a calculation unit and a local storage unit, the calculation unit is configured to generate the second verification code by acquiring the changed technical parameter data and the first verification code, and generate the nth verification code by sequentially acquiring the N-th changed technical parameter data and the N-1 th verification code; and the local storage unit is used for storing the technical parameter data after the Nth change and the Nth verification code.
8. The system according to claim 6, wherein the data verification recovery module comprises a verification unit and a data recovery unit, the verification unit is configured to compare the generated kth verification code with the verification code obtained in the blockchain private chain module for verification, the verification result includes pass and fail, and when the verification passes, the data backup module copies and stores the generated local data and the verification code on M devices cooperatively designed with the product; when the verification fails, triggering a data recovery unit to recover the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module; and the data recovery unit is used for receiving the signal which is sent by the verification unit and fails to pass the verification, and recovering the K-1 technical parameter data and the K-1 verification code on the M devices corresponding to the backup address of the data in the block chain private chain module to the local calculation storage module.
9. The system according to any one of claims 6-8, wherein the data backup module further comprises an anchoring unit and a blockchain public chain module for anchoring a backup address and a verification code of data in the blockchain private chain module to the blockchain public chain module; and the block chain public chain module is used for storing the backup address and the verification code of the data in the block chain private chain module.
10. A storage medium, characterized in that the storage medium comprises a stored program, wherein the program, when executed, controls an apparatus in which the storage medium is located to perform the method of any of claims 1-5.
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