CN111898165B - 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 generating a first verification code by acquiring original technical parameter data in the PDM system, generating a second verification code according to the changed technical parameter data and the first verification code after acquiring the changed technical parameter data in the PDM system, sequentially acquiring the 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 into a local storage unit; and then, all technical parameter data and verification codes are respectively copied and stored on M pieces of equipment of the product collaborative design, a series of task adjustment venation can be traced according to the data in the blockchain, and the mistakes or other malicious data changes are prevented, the data tampering is prevented, the occurrence of repeated design problems is 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 relevant information related to the product, including part information, configuration, documents, CAD files, structures, authority information and the like, and all relevant processes related to the product, including process definition and management, so that enterprises implement management of the PDM system, the production efficiency can be improved, the management of the whole life cycle of the product is facilitated, efficient utilization of documents, drawings and data is enhanced, the workflow is normalized, and the method has wide application in the enterprise product data management process.
US patent 10614177B2 discloses a system, method and program for a PDM system, the system comprising: one or more digital production devices 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 date of manufacture 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 comprising a second portion of the received object design file, wherein streaming the second portion of the object design file is from the one or more digital production devices after detecting that the first portion of the object design file is absent from the at least one or more digital production devices or after 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 component is properly manufactured 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 for the manufactured component when it is determined that the manufactured component is properly produced.
In the current PDM system actually applied by enterprises, the product design usually has some technical parameter changes, the technical parameter changes often bring about adjustment of other nodes of a series of product designs, and when the change of a certain technical parameter possibly occurs, the adjustment of related nodes or the change of other interference technical parameters is carried out on the PDM system, when the engineering change occurs or the project of the product design is finished, a series of task adjustment venues originally caused by the engineering change are often difficult to determine, so that the change quantity of other nodes caused by the engineering change and the change of other technical parameters caused by the change cannot be effectively traced, the actual original data of each collaborative design link is unclear, repeated design problems are frequently caused, and the collaborative design efficiency of the product is influenced.
Disclosure of Invention
Long-term practice finds that, due to various engineering changes inevitably generated in the product design process in the PDM system, when the engineering changes occur or after the product design project is finished, a series of task adjustment venues originally caused by the engineering changes are often difficult to determine, other node variation amounts caused by the engineering changes and other technical parameters causing the variation cannot be traced effectively, sometimes due to the fact that the actual original data of each collaborative design link is unclear due to the fact that the data are changed or are tampered with maliciously, repeated design problems are frequently caused, and the collaborative design efficiency of the product is affected.
In view of this, the present invention aims to provide a method for tracing technical parameter changes in a PDM system, so as to solve the problem that when engineering changes occur or product design projects are finished in the PDM system, it is difficult to determine a series of task adjustment venues originally caused by the engineering changes, and other node change amounts caused by the engineering changes and other technical parameters causing the changes cannot be traced effectively, so that real original data of each co-design link is unclear, and the method for tracing technical parameter changes in the PDM system includes:
step S1, original technical parameter data in a PDM system is obtained, and a first verification code is generated, wherein the first verification code corresponds to the original technical parameter data one by one;
s2, acquiring changed technical parameter data in a PDM system, generating a second verification code according to the changed technical parameter data and a first verification code, sequentially acquiring Nth changed technical parameter data, generating an Nth verification code according to the Nth changed technical parameter and an 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 larger than 1;
step S3, copying and storing all technical parameter data and verification codes on M pieces of equipment cooperatively designed by products respectively, and storing backup addresses and verification codes of returned data into a private chain module of a block chain, wherein M is a natural number larger than 1;
s4, technical parameter data change is carried out on design nodes in the PDM system, local K-th changed technical parameter data and K-th verification codes are generated, the K-th verification codes and verification codes obtained in the block chain private chain modules are compared and verified, and if a comparison result passes, the generated local K-th changed technical parameter data and the K-th verification codes are copied and stored on M pieces of equipment of the product collaborative design; if the comparison is not passed, restoring the K-1 th technical parameter data and the K-1 th verification code on the M pieces of equipment 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 larger 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 flow 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 acquisition module is used for 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 by one;
the calculation storage module is used for acquiring the technical parameter data after being changed in the PDM system, generating the second verification code according to the technical parameter data after being changed and the first verification code, sequentially acquiring the technical parameter data after being changed for the nth time, generating the verification code for the nth time according to the technical parameter after being changed for the nth time and the verification code for the nth-1 time, and storing the technical parameter data after being changed for the nth time and the verification code for the nth time into the local storage unit, wherein N is a natural number larger than 1;
the data backup module is used for respectively copying and storing all technical parameter data and verification codes on M pieces of equipment cooperatively designed by the product, and storing backup addresses and verification codes of returned data into the private chain module of the block chain, wherein M is a natural number larger than 1;
the data verification recovery module is used for generating technical parameter data change of design nodes in the PDM system, generating local K-th changed technical parameter data and K-th verification codes, comparing and verifying the K-th verification codes with verification codes 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 codes on M pieces of equipment cooperatively designed by the product if the comparison result passes; if the comparison is not passed, restoring the K-1 th technical parameter data and the K-1 th verification code on the M pieces of equipment 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 larger than 1.
Preferably, the calculation storage module comprises a calculation unit and a local storage unit, wherein the calculation unit is used for generating the second verification code by acquiring the changed technical parameter data and the first verification code, and generating the nth verification code by sequentially acquiring the nth changed technical parameter data and the (N-1) th verification code; the local storage unit is used for storing the technical parameter data and the Nth verification code after the Nth change.
Preferably, the data verification recovery module comprises a verification unit and a data recovery unit, wherein the verification unit is used for comparing and verifying the generated K verification code with the verification code obtained in the block chain private chain module, the verification result comprises passing and failing, and when the verification is passed, the generated local data and the verification code are copied and stored on M pieces of equipment of the product collaborative design through the data backup module; when the verification is not passed, triggering a data recovery unit to recover the K-1 th technical parameter data and the K-1 th verification code on M pieces of equipment corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module; the data recovery unit is used for receiving the signals which are sent by the verification unit and are not passed through the verification, and recovering the K-1 th technical parameter data and the K-1 th verification code on the M pieces of equipment 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 comprises an anchoring unit and a blockchain public chain module, which are used for anchoring the backup address and the verification code of the data in the blockchain private chain module to the blockchain public chain module; the public chain module of the block chain is used for storing the backup address and the verification code of the data in the private chain module of the block chain.
According to another aspect of the embodiments of the present invention, there is provided a storage medium including a stored program, where the program, when executed, controls a device in which the storage medium is located to perform the above-described method.
According to the technical parameter change tracing method in the PDM system, the first verification code is generated by acquiring original technical parameter data in the PDM system, the second verification code is generated according to the changed technical parameter data and the first verification code after acquiring the changed technical parameter data in the PDM system, the Nth verification code is generated according to the Nth changed technical parameter and the N-1 th verification code, and the Nth changed technical parameter data and the Nth verification code are stored in the local storage unit; copying and storing all technical parameter data and verification codes on M pieces of equipment cooperatively designed by products respectively, and storing the backup address and verification code of returned data into a private chain module of the block chain; generating technical parameter data change by design nodes in the PDM system, generating local Kth changed technical parameter data and a Kth verification code, comparing and verifying the Kth verification code with the verification code obtained in the private chain module of the block chain, and if the comparison result passes, copying and storing the generated local Kth changed technical parameter data and the Kth verification code on M pieces of equipment of the product collaborative design; if the comparison is not passed, restoring the K-1 th technical parameter data and the K-1 st verification code on the M pieces of equipment 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 engineering change is changed, a series of tasks can be traced according to the data in the blockchain to adjust the context, other node change amounts caused by engineering change and other technical parameters causing the change can be traced effectively, real original data of each collaborative design link can be restored, repeated design problems are reduced, and the collaborative design efficiency of products 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 included to provide a further understanding of the invention, illustrate and explain the invention and are not to be construed as limiting the invention. In the drawings:
FIG. 1 is a flowchart of a method for tracing technical parameter changes in a PDM system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of one embodiment of a system for performing a technique parameter change tracing method in a PDM system.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," "third," and the like in the description and the claims of the present invention and in the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe 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.
In order to solve the problems that after engineering change occurs or after a product design project is finished in a PDM system, a series of task adjustment venation originally caused by engineering change is difficult to determine, other node change amounts caused by engineering change and other technical parameters causing the change cannot be effectively traced, and therefore real original data of each collaborative design link are unclear. As shown in fig. 1, the present invention provides a method for tracing technical parameter changes in a PDM system, as shown in fig. 1, a flowchart of a method for tracing technical parameter changes in a PDM system according to an embodiment of the present invention, where the method for tracing technical parameter changes in a PDM system includes:
step S1, original technical parameter data in a PDM system is obtained, and a first verification code is generated, wherein the first verification code corresponds to the original technical parameter data one by one;
s2, acquiring changed technical parameter data in a PDM system, generating a second verification code according to the changed technical parameter data and a first verification code, sequentially acquiring Nth changed technical parameter data, generating an Nth verification code according to the Nth changed technical parameter and an 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 larger than 1;
step S3, copying and storing all technical parameter data and verification codes on M pieces of equipment cooperatively designed by products respectively, and storing backup addresses and verification codes of returned data into a private chain module of a block chain, wherein M is a natural number larger than 1;
s4, technical parameter data change is carried out on design nodes in the PDM system, local K-th changed technical parameter data and K-th verification codes are generated, the K-th verification codes and verification codes obtained in the block chain private chain modules are compared and verified, and if a comparison result passes, the generated local K-th changed technical parameter data and the K-th verification codes are copied and stored on M pieces of equipment of the product collaborative design; if the comparison is not passed, restoring the K-1 th technical parameter data and the K-1 th verification code on the M pieces of equipment 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 larger than 1.
According to the method, original technical parameter data in a PDM system is obtained, a first verification code is generated, after changed technical parameter data in the PDM system is obtained, a second verification code is generated according to the changed technical parameter data and the first verification code, nth changed technical parameter data is sequentially obtained, an Nth verification code is generated according to the Nth changed technical parameter and the N-1 th verification code, and the Nth changed technical parameter data and the Nth verification code are stored in a local storage unit; copying and storing all technical parameter data and verification codes on M pieces of equipment cooperatively designed by products respectively, and storing the backup address and verification code of returned data into a private chain module of the block chain; generating technical parameter data change by design nodes in the PDM system, generating local Kth changed technical parameter data and a Kth verification code, comparing and verifying the Kth verification code with the verification code obtained in the private chain module of the block chain, and if the comparison result passes, copying and storing the generated local Kth changed technical parameter data and the Kth verification code on M pieces of equipment of the product collaborative design; if the comparison is not passed, restoring the K-1 th technical parameter data and the K-1 st verification code on the M pieces of equipment 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 engineering change is changed, a series of tasks can be traced according to the data in the blockchain to adjust the context, and the data is prevented from being falsified or changed maliciously, so that the change quantity of other nodes and other technical parameters causing the change caused by engineering change can be traced effectively, the real original data of each collaborative design link can be restored, the occurrence of repeated design problems is further reduced, and the collaborative design efficiency of products is improved.
In order to systematically damage or lose errors to the engineering change data in the private chain module of the blockchain, in the preferred case of the present invention, in step S3, the backup address and the verification code of the data in the private chain module of the blockchain are anchored to the public chain module of the blockchain by an anchoring unit. For example, when the blockchain private chain module (i.e., the private chain) is constructed, the private chain of the ethernet can be constructed by modifying the private chain of the ethernet creation block, the mining mode, and the like. The ethernet workshop mining mode can be modified into PoA (pro 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.
In order to obtain the technical parameter data types of the PDM system for possible engineering changes, and to better accommodate various file types, in a preferred aspect of the present invention, the technical parameter data in the PDM system includes text data, image data, and XML structured data in step S1.
In order to obtain node information related to technical parameter data and in a tracing stage, information of a corresponding design flow node can be better positioned and searched, and in the preferred case of the invention, the changed technical parameter data comprises changed design flow node information data.
For example, the design flow 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 blockchain private chain module finds a backup address of the corresponding technical parameter data, the technical parameter data of a certain change in the backup address can be searched and referred.
In order to make the verification code generated in the blockchain non-tamperable, in the preferred case 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 a PDM system can only have a unique Hash value.
The invention also discloses a system for executing the technical parameter change tracing method in the PDM system, as shown in figure 2, the system comprises:
the acquisition module is used for 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 by one;
the calculation storage module is used for acquiring the technical parameter data after being changed in the PDM system, generating the second verification code according to the technical parameter data after being changed and the first verification code, sequentially acquiring the technical parameter data after being changed for the nth time, generating the verification code for the nth time according to the technical parameter after being changed for the nth time and the verification code for the nth-1 time, and storing the technical parameter data after being changed for the nth time and the verification code for the nth time into the local storage unit, wherein N is a natural number larger than 1;
the data backup module is used for respectively copying and storing all technical parameter data and verification codes on M pieces of equipment cooperatively designed by the product, and storing backup addresses and verification codes of returned data into the private chain module of the block chain, wherein M is a natural number larger than 1;
the data verification recovery module is used for generating technical parameter data change of design nodes in the PDM system, generating local K-th changed technical parameter data and K-th verification codes, comparing and verifying the K-th verification codes with verification codes 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 codes on M pieces of equipment cooperatively designed by the product if the comparison result passes; if the comparison is not passed, restoring the K-1 th technical parameter data and the K-1 th verification code on the M pieces of equipment 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 larger 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 the technical parameter data after modification in the PDM system, the computing and storing module generates a second verification code according to the technical parameter data after modification and the first verification code, sequentially acquires the technical parameter data after modification of the nth time, generates an nth verification code according to the technical parameter after modification of the nth time and the N-1 th verification code, and stores the technical parameter data after modification of the nth time and the nth verification code into the local storage unit; the data backup module copies and stores all technical parameter data and verification codes on M pieces of equipment cooperatively designed by the product respectively, and the backup address and verification code of the returned data are stored in the block chain private chain module; the method comprises the steps that technical parameter data change occurs to design nodes in a PDM system, local K-th changed technical parameter data and K-th verification codes are generated, a data verification recovery module compares and verifies the K-th verification codes with verification codes obtained from a block chain private chain module, and if a comparison result passes, the generated local K-th changed technical parameter data and the K-th verification codes are copied and stored on M pieces of equipment of the product collaborative design; if the comparison is not passed, restoring the K-1 th technical parameter data and the K-1 st verification code on the M pieces of equipment 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 engineering change is changed, a series of tasks can be traced according to the data in the blockchain to adjust the context, and the data is prevented from being falsified or changed maliciously, so that the change quantity of other nodes and other technical parameters causing the change caused by engineering change can be traced effectively, the real original data of each collaborative design link can be restored, the occurrence of repeated design problems is further reduced, and the collaborative design efficiency of products is improved.
Because the product design process in the PDM system is carried out in a distributed multi-center mode in different places, aiming at the product collaborative design process, not only the technical parameter data is required to be locally stored, but also the process data and the result data are required to be further stored, and in order to better store the technical parameter data locally, under the preferred condition of the invention, the calculation storage module comprises a calculation unit and a local storage unit, and 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 N verification code by acquiring the N-th changed technical parameter data and the N-1-th verification code; the local storage unit is used for storing the technical parameter data and the Nth verification code after the Nth change.
For example, the local storage unit can employ a relational database such as MySQL, SQL Server, etc., so that it can be preferably used as a storage carrier for local data.
In order to effectively prevent technical parameter data of product design in a PDM system from being changed by mistake or other maliciously caused and prevent data from being tampered, in the preferred case of the invention, the data verification recovery module comprises a verification unit and a data recovery unit, wherein the verification unit is used for comparing and verifying the generated K verification code with the verification code obtained in the private chain module of the block chain, the verification result comprises passing and failing, and when the verification is passed, the generated local data and the verification code are copied and stored on M pieces of equipment of the product collaborative design through the data backup module; when the verification is not passed, triggering a data recovery unit to recover the K-1 th technical parameter data and the K-1 th verification code on M pieces of equipment corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module; the data recovery unit is used for receiving the signals which are sent by the verification unit and are not passed through the verification, and recovering the K-1 th technical parameter data and the K-1 th verification code on the M pieces of equipment 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 make systematic damage or loss error to the engineering change data in the blockchain private chain module, the data backup module further comprises an anchoring unit and a blockchain public chain module, wherein the anchoring unit is used for anchoring the backup address and the verification code of the data in the blockchain private chain module to the blockchain public chain module; the public chain module of the block chain is used for storing the backup address and the verification code of the data in the private chain module of the block chain. For example, when the blockchain private chain module (i.e., the private chain) is constructed, the private chain of the ethernet can be constructed by modifying the private chain of the ethernet creation block, the mining mode, and the like.
The embodiment of the invention also provides a storage medium which comprises a stored program, wherein the device where the storage medium is controlled to execute the method when the program runs.
It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present invention is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present invention. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present invention.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, such as the division of the units, merely a logical function division, and there may be additional manners of dividing the actual implementation, such as multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, or may be in electrical or other forms.
The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution contributing to the prior art or in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a mobile terminal, a server or a network device, etc.) to perform 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, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The technical parameter change tracing method in the PDM system is characterized by comprising the following steps of:
step S1, original technical parameter data in a PDM system is obtained, and a first verification code is generated, wherein the first verification code corresponds to the original technical parameter data one by one;
s2, acquiring changed technical parameter data in a PDM system, generating a second verification code according to the changed technical parameter data and the first verification code, sequentially acquiring an 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 larger than 1;
step S3, copying and storing all technical parameter data and verification codes on M pieces of equipment cooperatively designed by products respectively, and storing backup addresses and verification codes of returned data into a private chain module of a block chain, wherein M is a natural number larger than 1;
s4, technical parameter data change is carried out on design nodes in the PDM system, local K-th changed technical parameter data and K-th verification codes are generated, the K-th verification codes and verification codes obtained in the block chain private chain modules are compared and verified, and if a comparison result passes, the generated local K-th changed technical parameter data and the K-th verification codes are copied and stored on M pieces of equipment of the product collaborative design; if the comparison is not passed, restoring the K-1 th technical parameter data and the K-1 th verification code on the M pieces of equipment 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 larger than 1.
2. The method according to claim 1, wherein in step S3, the backup address and the verification code of the data in the private chain module of the blockchain are anchored to the public chain module of the blockchain by an anchor unit.
3. The method for tracing technical parameter changes in a PDM system according to 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 for tracing a change in a technical parameter in a PDM system according to claim 1, wherein the changed technical parameter data includes changed node information data of a design flow.
5. The method for tracing technical parameter changes in a PDM system according to any one 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 for performing the technical parameter change tracing method in a PDM system according to any one of claims 1-5, said system comprising:
the acquisition module is used for 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 by one;
the computing and storing module is used for acquiring the technical parameter data after being changed in the PDM system, generating a second verification code according to the technical parameter data after being changed and the first verification code, sequentially acquiring the technical parameter data after being changed for the nth time, generating the verification code for the nth time according to the technical parameter after being changed for the nth time and the verification code for the nth-1 time, and storing the technical parameter data after being changed for the nth time and the verification code for the nth time into the local storage unit, wherein N is a natural number larger than 1;
the data backup module is used for respectively copying and storing all technical parameter data and verification codes on M pieces of equipment cooperatively designed by the product, and storing backup addresses and verification codes of returned data into the private chain module of the block chain, wherein M is a natural number larger than 1;
the data verification recovery module is used for generating technical parameter data change of design nodes in the PDM system, generating local K-th changed technical parameter data and K-th verification codes, comparing and verifying the K-th verification codes with verification codes 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 codes on M pieces of equipment cooperatively designed by the product if the comparison result passes; if the comparison is not passed, restoring the K-1 th technical parameter data and the K-1 th verification code on the M pieces of equipment 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 larger than 1.
7. The system of claim 6, wherein the computing storage module comprises a computing unit and a local storage unit, the computing unit is configured to generate the second verification code from the acquired modified technical parameter data and the first verification code, and sequentially generate an nth verification code from the acquired nth modified technical parameter data and the nth-1 verification code; the local storage unit is used for storing the technical parameter data and the Nth verification code after the Nth change.
8. The system of claim 6, wherein the data verification recovery module comprises a verification unit and a data recovery unit, the verification unit is used for comparing and verifying the generated kth verification code with the verification code obtained from the blockchain private chain module, the verification result comprises pass and fail, and when the verification is passed, the generated local data and the verification code are duplicated and stored on M devices of the product collaborative design through the data backup module; when the verification is not passed, triggering a data recovery unit to recover the K-1 th technical parameter data and the K-1 th verification code on M pieces of equipment corresponding to the backup address of the data in the block chain private chain module to a local calculation storage module; the data recovery unit is used for receiving the signals which are sent by the verification unit and are not passed through the verification, and recovering the K-1 th technical parameter data and the K-1 th verification code on the M pieces of equipment corresponding to the backup address of the data in the block chain private chain module to the local calculation storage module.
9. The system of any of claims 6-8, wherein the data backup module further comprises an anchoring unit and a blockchain public chain module for anchoring the backup address and the validation code of the data in the blockchain private chain module to the blockchain public chain module; the public chain module of the block chain is used for storing the backup address and the verification code of the data in the private chain module of the block chain.
10. A storage medium comprising a stored program, wherein the program, when run, controls a device in which the storage medium is located to perform the method of any one of claims 1-5.
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