Disclosure of Invention
The invention aims to provide a two-ticket management method, a system, computer equipment and a storage medium based on security verification, which are used for effectively predicting potential risks of actual operation of a ticket, improving the security and stability of the actual operation of the ticket, further improving the effectiveness and rationality of two-ticket management and providing reliable guarantee for the safe and stable operation of an electric power system by combining two-ticket approval with the logic security verification of the operation of a power plant.
In order to achieve the above object, it is necessary to provide a two-ticket management method, system, computer device and storage medium based on security verification.
In a first aspect, an embodiment of the present invention provides a security verification-based two-ticket management method, including the steps of:
carrying out systematic modeling on actual process equipment of a power plant according to the actual operation process flow of the power plant in advance, and constructing a power plant operation simulation model;
Responding to a bill application request, acquiring bill basic information, and generating a corresponding electronic bill according to the bill basic information; the bill comprises a work bill and an operation bill;
according to the electronic bill, acquiring a corresponding bill operation flow and safety measures, loading a power plant operation simulation model, reading process equipment monitoring information of a power plant process control system and a plant-level real-time information system, and calling an operation interface associated with process equipment to be operated in the power plant process control system;
executing the bill operation flow on the operation interface, carrying out bill operation safety verification by combining the safety measures according to the power plant operation simulation model, a power plant process control system and a plant-level real-time information system, and generating a bill operation verification report;
and judging whether the verification is successful or not according to the bill operation verification report, if so, executing the electronic bill issuing and approval, otherwise, adjusting the bill operation flow, and re-executing the bill operation safety verification until the verification is successful.
Further, the basic bill information comprises a code of the technological equipment to be operated, a name of the technological equipment to be operated, working time length, related professional and personnel information;
The step of retrieving an operation interface associated with the process equipment to be operated in the process control system of the power plant comprises the following steps:
extracting an operation interface associated with the process equipment to be operated in the power plant process control system from a database according to the code of the process equipment to be operated of the electronic bill, and displaying the running state information of each process equipment in real time; the operating state information includes device parameters and device states.
Further, the step of obtaining the corresponding bill operation flow and the security measure includes:
traversing a database according to the operation type of the electronic bill, and judging whether a preset bill operation flow and safety measures exist or not;
if the preset bill operation flow and the safety measure exist, the corresponding bill operation flow and the safety measure are directly acquired, otherwise, the bill operation flow and the safety measure which are input in real time are acquired through an operation interface related to the process equipment to be operated.
Further, the power plant process control system comprises a distributed control system, a programmable logic control system, a plant electricity monitoring management system and a power network computing monitoring system.
Further, the steps of executing the bill operation flow on the operation interface, carrying out bill operation safety verification by combining the safety measures according to the power plant operation simulation model, the power plant process control system and the plant-level real-time information system, and generating a bill operation verification report comprise the following steps:
Executing the bill operation flow on the operation interface in a step sequence, synchronizing corresponding operation instructions to the power plant operation simulation model in combination with the safety measures, adjusting the process equipment to be operated, and synchronizing process equipment monitoring information of a power plant process control system and a plant-level real-time information system in real time; the process equipment monitoring information comprises operation state information of all process equipment in the power plant operation simulation model corresponding to each step of the bill operation flow;
according to the process equipment monitoring information, analyzing whether each step of the bill operation flow is executed with related equipment safety risks in real time, and obtaining verification analysis results corresponding to each step;
and finishing and generating a bill operation verification report according to each verification analysis result in response to the completion of the bill operation flow.
Further, the step of analyzing whether the safety risk of the related equipment exists in each step of the bill operation flow in real time according to the process equipment monitoring information includes:
analyzing whether linkage action relations between the process equipment to be operated and other process equipment exist or not according to the process equipment monitoring information corresponding to each step;
Judging whether the parameter fluctuation and the state change of each process equipment with the linkage action relationship are in a normal range, if so, judging that the safety risk of the related equipment does not exist, otherwise, judging that the safety risk of the related equipment exists.
Further, the bill operation verification report comprises an adjustment suggestion of verification failure;
the step of adjusting the bill operation flow and re-executing the bill operation safety verification until the verification is successful comprises the following steps:
and adjusting the bill operation flow according to the adjustment suggestion in the bill operation verification report, and executing the adjusted bill operation flow on the operation interface again according to the step sequence.
In a second aspect, an embodiment of the present invention provides a two-ticket management system based on security verification, the system including:
the system comprises a power plant simulation module, a two-ticket management module, an information synchronization module, a logic verification module, a verification adjustment module and a database:
the power plant simulation module is used for carrying out systematic modeling on actual process equipment of the power plant according to the actual operation process flow of the power plant and constructing a power plant operation simulation model; the power plant operation simulation model is also used for loading the state of the process equipment and the operation instruction, and the power plant operation simulation model is interacted with the logic verification module through the information synchronization module;
The two-ticket management module is used for responding to a ticket application request, acquiring ticket basic information and generating a corresponding electronic ticket according to the ticket basic information; the electronic bill verification system is also used for configuring a two-bill generation standard, a two-bill operation flow and safety measures, and carrying out approval on the electronic bill according to the verification result of the logic verification module;
the information synchronization module is used for acquiring a corresponding bill operation flow and safety measures according to the electronic bill, loading a power plant operation simulation model, reading process equipment monitoring information of a power plant process control system and a plant-level real-time information system, and calling an operation interface associated with process equipment to be operated in the power plant process control system from the database; the system is also used for synchronously acquiring and displaying the state information of the process equipment from the power plant process control system and the plant-level real-time information monitoring system; the power plant process control system comprises a distributed control system, a programmable logic control system, a plant power monitoring management system and a power network computing and monitoring system; the state information comprises equipment parameters and equipment states;
the logic verification module is used for executing the bill operation flow on the operation interface, synchronizing information with the power plant operation simulation model, the power plant process control system and the plant-level real-time information system through the information synchronization module, performing bill operation safety verification, and generating a bill operation verification report;
The verification adjustment module is used for adjusting the bill operation flow when judging that the bill operation verification report is verification failure, and re-executing the bill operation safety verification through the logic verification module until the verification is successful;
the database is used for storing the data information of each module.
In a third aspect, embodiments of the present application further provide a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the above method when executing the computer program.
In a fourth aspect, embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the above method.
The application provides a two-ticket management method, a system, computer equipment and a storage medium based on security verification, by the method, the application realizes that the actual process equipment of a power plant is systematically modeled in advance according to the actual process flow of the power plant, a power plant operation simulation model is built, after an electronic ticket is generated according to the acquired basic information of the ticket, the corresponding ticket operation flow and security measures are acquired, the power plant operation simulation model is loaded, the process equipment monitoring information of a power plant process control system and a plant-level real-time information system is read, then the ticket operation flow is executed on an operation interface associated with the process equipment to be operated in the acquired power plant process control system, the security verification of the ticket operation is carried out by combining with the corresponding security measures, a ticket operation verification report is generated, and when verification fails, the ticket operation flow is adjusted to be re-verified until success, and the technical scheme of electronic ticket issuing approval is executed. Compared with the prior art, the two-ticket management method based on the security verification combines two-ticket approval with the power plant operation logic security verification, comprehensively verifies and analyzes factors such as execution operation, execution time length and execution result of the ticket through simulation of the ticket actual operation process and monitoring of the equipment operation state, effectively predicts potential risks of ticket actual operation, improves the security and stability of ticket actual operation, further improves the effectiveness and rationality of two-ticket management, and provides reliable guarantee for safe and stable operation of an electric power system.
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples, and it is apparent that the examples described below are part of the examples of the present application, which are provided for illustration only and are not intended to limit the scope of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The two-ticket management method based on the security verification provided by the application can be applied to the two-ticket management method based on the security verification shown in the figure 1, and can be applied to a server or terminal equipment shown in the figure 1. The terminal may be, but not limited to, various personal computers, notebook computers, smartphones, tablet computers and portable wearable devices, and the server may be implemented by a separate server or a server cluster formed by a plurality of servers. The server can preset a standard flow of two-ticket management, realize interactive butt joint with a power plant process control system and a factory-level real-time information system, build a power plant operation simulation model according to the process flow of the actual operation of a power plant, acquire a corresponding operation flow and safety measures according to the type of an application ticket when receiving an operation ticket or a work ticket filling application of a user terminal, execute control of process equipment to be operated according to the operation flow and the safety measures on a related operation interface of the power plant process control system, synchronize to the power plant operation simulation model for simulation, and perform ticket operation safety risk assessment verification according to equipment state monitoring information synchronized by the power plant process control system and the factory-level real-time information system, judge whether the ticket passes the verification result, inform a user terminal to adjust and re-verify the operation flow when the ticket passes the verification, inform the user terminal to receive the actual operation of the ticket and complete storage and archiving after the corresponding actual operation is completed, and effectively improve the safety and stability of the actual operation ticket. The security verification-based two-ticket management method of the present application will be described in detail by way of examples.
In one embodiment, as shown in fig. 2, there is provided a two-ticket management method based on security verification, the method comprising the steps of:
s11, carrying out systematic modeling on actual process equipment of the power plant in advance according to the actual operation process flow of the power plant, and building a power plant operation simulation model;
the power plant operation simulation model can be understood as that by carrying out mechanism analysis on actual operation process equipment of the power plant and carrying out systematic modeling which accords with the process operation characteristics of the power plant on different process equipment, the simulation of the mechanism operation of the actual process equipment of the power plant can be realized by loading the state and the operation instruction of the actual operation equipment, the mathematical model which truly reflects the actual operation condition of the power plant can be more similar to the actual operation environment analysis, a reliable and effective logic operation environment is provided for logic security verification of the follow-up bill operation flow, and the security of the actual operation of the bill is further effectively improved.
S12, responding to a bill application request, acquiring bill basic information, and generating a corresponding electronic bill according to the bill basic information; the bill comprises a work bill and an operation bill;
the operation ticket is an electric operation application ticket for carrying out dispatching instructions or control operations on the power plant side; the work ticket is a public ticket of the power generation part, the equipment maintenance part and the security monitoring part, and is an application ticket for performing maintenance, safe execution, management and other operations on equipment; bill basic information may be understood as bill content that must be filled in according to the type of bill according to the creation requirement of a preset bill generation template, which includes, but is not limited to, a process equipment code to be operated, a process equipment name to be operated, a working time period, related professional and personnel information (personnel basic information, department team information, etc.). When receiving the application request of the operation ticket or the working ticket which is filled in the basic information of the ticket by the user through the terminal equipment, the corresponding electronic ticket can be generated according to the template of the ticket type, and the generated electronic ticket is subjected to logic security verification and ticket approval according to the operation flow and security measures of the ticket according to the standard flow management specification of the corresponding ticket type, wherein the specific electronic ticket generation mode is realized by adopting the prior art and is not repeated here.
S13, acquiring a corresponding bill operation flow and safety measures according to the electronic bill, loading a power plant operation simulation model, reading process equipment monitoring information of a power plant process control system and a plant-level real-time information system, and calling an operation interface associated with process equipment to be operated in the power plant process control system;
the power plant operation simulation model is used for simulating an actual operation mechanism of a power plant, the power plant process control system and the plant-level real-time information system are systems for monitoring the operation states of all process equipment and equipment cabinets of the power plant, and numerous data supports such as actual control system pictures, data, equipment states and equipment attributes are provided for subsequent logic security verification, wherein the power plant process control system comprises a distributed control system, a programmable logic control system, a plant power monitoring management system and a power network computing monitoring system, and can be selected and adjusted according to actual application requirements; the operation interface associated with the process equipment to be operated can be understood as a visual operation interface which is extracted based on the database information corresponding to each power plant process control system according to the visual control requirement, according to the code of the process equipment to be operated or the name of the process equipment to be operated of the electronic bill, and is used for performing operation control on the related process equipment and updating and displaying the real-time state of the related process equipment including the equipment parameters and the equipment state.
The logical security verification of the electronic bill can be understood as operation security verification and risk assessment performed on the operation flow and security measures of the electronic bill to be used based on the actual process operation mechanism of the power plant; in order to better solve the problems that the existing two-ticket approval excessively depends on the working experience of operation staff and approval staff, safety accidents are easy to cause due to the fact that the running condition of a power plant in the actual operation process is invisible, and the like, the embodiment preferably carries out corresponding visual logic safety simulation verification on the bill operation flow and safety measures through a power plant running simulation model, a power plant process control system and a plant-level real-time information system after the electronic bill is generated according to a standard template or preset requirements, and is then used for actual production operation. Before starting verification, the corresponding operation flow and safety measures are required to be obtained according to the electronic bill information, and a power plant operation simulation model, a power plant process control system and a plant-level real-time information system are loaded and operated, and an operation interface associated with process equipment to be operated in the power plant process control system is called based on a database;
the bill operation flow can be understood as the operation method steps of the process equipment related to the bill, and the corresponding safety measures can be understood as the means for ensuring the safety production, such as isolation point setting corresponding to the operation method steps; it should be noted that, in order to ensure the intelligence and efficiency of logic security verification, in this embodiment, preferably, the operation flow and security measures corresponding to a common operation ticket or work ticket may be preconfigured according to working experience and stored in a database to implement the full-automatic operation of subsequent logic verification, and for the case that no operation flow and security measure exist in the existing database, the user may flexibly formulate and adjust the operation flow according to actual requirements, and directly manually input the operation flow and security measure on an operation interface associated with the process equipment to be operated, and correspondingly, the step of obtaining the corresponding ticket operation flow and security measure includes:
Traversing a database according to the operation type of the electronic bill, and judging whether a preset bill operation flow and safety measures exist or not;
if the preset bill operation flow and the safety measure exist, the corresponding bill operation flow and the safety measure are directly acquired, otherwise, the bill operation flow and the safety measure which are input in real time are acquired through an operation interface related to the process equipment to be operated.
S14, executing the bill operation flow on the operation interface, carrying out bill operation safety verification by combining the safety measures according to the power plant operation simulation model, the power plant process control system and the plant-level real-time information system, and generating a bill operation verification report; in order to ensure feasibility, safety and integrity of related logic safety verification, the embodiment preferably performs verification in steps, in sequence and in a preset execution duration, and performs real-time observation and analysis on the running state of process equipment of a power plant to evaluate and record operation risks of each step, as shown in fig. 3, the specific steps for performing the safety verification of the bill operation include:
Executing the bill operation flow on the operation interface in a step sequence, synchronizing corresponding operation instructions to the power plant operation simulation model in combination with the safety measures, adjusting the process equipment to be operated, and synchronizing process equipment monitoring information of a power plant process control system and a plant-level real-time information system in real time; the process equipment monitoring information comprises operation state information of all process equipment in the power plant operation simulation model corresponding to each step of the bill operation flow; wherein, the operation instructions comprise equipment start/stop, cabinet switch on/off, valve on/off and the like; the operation state information comprises equipment parameters and equipment states, wherein the equipment parameters comprise, but are not limited to, temperature, pressure, flow, current, quality and the like, and the equipment states comprise, but are not limited to, start/stop instructions, opening and closing instructions, cabinet switch states, fault alarms and the like;
according to the process equipment monitoring information, analyzing whether each step of the bill operation flow is executed with related equipment safety risks in real time, and obtaining verification analysis results corresponding to each step; the related equipment safety risk can be understood as the evaluation analysis conclusion and the risk of whether the related equipment safety risk exists in the execution process of the corresponding step sequence action of each step or not are obvious, wherein the evaluation analysis conclusion and the risk are that the unit operation influence is generated, the process equipment is damaged, the personnel operation environment is unsuitable, and the like; specifically, the step of analyzing, in real time, whether the execution of each step of the bill operation flow has a related equipment security risk according to the process equipment monitoring information includes:
Analyzing whether linkage action relations between the process equipment to be operated and other process equipment exist or not according to the process equipment monitoring information corresponding to each step;
judging whether the parameter fluctuation and the state change of each process equipment with the linkage action relationship are in a normal range, if so, judging that the safety risk of the related equipment does not exist, otherwise, judging that the safety risk of the related equipment exists;
according to the method, the ticket operation flow is executed step by step, a control system interface of an actual operation process is loaded, real-time equipment state synchronization is carried out through a database, consistency of pictures and states and an operation picture of an actual power plant process control system is achieved, understanding and execution of personnel are facilitated, convenience is brought to selection of manual operation in the process of executing two related tickets, actual conditions of a production site can be reflected timely, whether normal operation of a machine set, damage of an equipment body or associated equipment, power grid fluctuation or scheduling load influence and the like are influenced due to operation in the ticket execution process is perceived timely, reliable and effective verification and analysis functions are achieved, and safety, rationality and effectiveness of two ticket approval are guaranteed;
And finishing and generating a bill operation verification report according to each verification analysis result in response to the completion of the bill operation flow.
S15, judging whether the verification is successful or not according to the bill operation verification report, if so, executing the electronic bill issuing approval, otherwise, adjusting the bill operation flow, and re-executing the bill operation safety verification until the verification is successful; wherein the bill operation verification report comprises adjustment advice of verification failure; correspondingly, the step of adjusting the bill operation flow and re-executing the bill operation safety verification until the verification is successful comprises the following steps:
according to the adjustment suggestion in the bill operation verification report, adjusting the bill operation flow, and executing the adjusted bill operation flow again according to the step sequence on the operation interface; in principle, the preset bill operation flow of the database can be modified by adjusting the bill operation flow, and the verification is performed according to the steps, but in order to ensure the high efficiency of the logic security verification, the embodiment preferably adopts manual adjustment of the bill operation flow and directly performs real-time operation verification on the corresponding operation interface, and after the verification is passed, the corresponding operation flow and security measures are stored in the database, so as to provide data support for the operation security verification of the subsequent electronic bill.
After the electronic bill issuing and approval work is completed through the steps, operation and maintenance personnel can start working isolation to overhaul or maintain related process equipment according to the bill operation flow and safety measures which pass verification, and after the related work task is completed and the test is successful, archiving and storing of the corresponding electronic bill are completed.
According to the embodiment of the application, the flow standardized work approval flow of the two-ticket management is associated with the equipment state data of the on-site control system of the power plant, the simulation of the ticket actual operation process is carried out by combining the power plant simulation model, the comprehensive and effective visual logic safety verification analysis is carried out on the factors such as the execution operation, the execution time length and the execution result of each step of the ticket operation flow, the ticket actual operation risk is effectively evaluated in time, the safety and the stability of the ticket actual operation are improved, the effectiveness and the rationality of the two-ticket management are further improved, the reliable guarantee is provided for the safe and stable operation of the power system, and meanwhile, the related operation and maintenance personnel can be subjected to actual operation training learning by utilizing the simulation logic safety verification method of the application, so that the operation flow is quickly understood and the skill level is improved.
Although the steps in the flowcharts described above are shown in order as indicated by arrows, these steps are not necessarily executed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders.
In one embodiment, as shown in fig. 4, a two-ticket management system based on security verification is provided, the system comprising a power plant simulation module, a two-ticket management module, an information synchronization module, a logic verification module, a verification adjustment module, and a database:
the power plant simulation module 1 is used for carrying out systematic modeling on actual process equipment of a power plant according to the actual operation process flow of the power plant, and building a power plant operation simulation model; the power plant operation simulation model is also used for loading the state of the process equipment and the operation instruction, and the power plant operation simulation model is interacted with the logic verification module through the information synchronization module;
the two-ticket management module 2 is used for responding to a ticket application request, acquiring ticket basic information and generating a corresponding electronic ticket according to the ticket basic information; the electronic bill verification system is also used for configuring a two-bill generation standard, a two-bill operation flow and safety measures, and carrying out approval on the electronic bill according to the verification result of the logic verification module;
the information synchronization module 3 is used for acquiring a corresponding bill operation flow and safety measures according to the electronic bill, loading a power plant operation simulation model, reading process equipment monitoring information of a power plant process control system and a plant-level real-time information system, and retrieving an operation interface associated with process equipment to be operated in the power plant process control system from the database; the system is also used for synchronously acquiring and displaying the state information of the process equipment from the power plant process control system and the plant-level real-time information monitoring system; the power plant process control system comprises a distributed control system, a programmable logic control system, a plant power monitoring management system and a power network computing and monitoring system; the state information comprises equipment parameters and equipment states;
The logic verification module 4 is configured to execute the bill operation flow on the operation interface, perform information synchronization with the power plant operation simulation model, the power plant process control system and the plant-level real-time information system through the information synchronization module, perform safety verification on bill operation, and generate a bill operation verification report;
the verification adjustment module 5 is configured to adjust the bill operation flow when the bill operation verification report is determined to be verification failure, and re-execute the bill operation security verification through the logic verification module until the verification is successful;
the database 6 is used for storing data information of each module.
It should be noted that, for specific limitation of the two-ticket management system based on security verification, reference may be made to the limitation of the two-ticket management method based on security verification hereinabove, and the description thereof is omitted herein. The respective modules in the above-described security verification-based two-ticket management system may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
Fig. 5 shows an internal structural diagram of a computer device, which may be a terminal or a server in particular, in one embodiment. As shown in fig. 5, the computer device includes a processor, a memory, a network interface, a display, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program, when executed by a processor, implements the two-ticket management method based on security verification described above. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those of ordinary skill in the art that the structure shown in FIG. 5 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computing power device may include more or fewer components than shown, or may combine some of the components, or have the same arrangement of components.
In one embodiment, a computer device is provided comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the above method when the computer program is executed.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, implements the steps of the above method.
In summary, the two-ticket management method, the system, the computer equipment and the storage medium based on the security verification provided by the embodiment of the application are characterized in that the two-ticket management method based on the security verification carries out systematic modeling on the actual process equipment of the power plant through the process flow which is actually operated in advance according to the power plant, builds a power plant operation simulation model, acquires corresponding ticket operation flows and security measures after generating an electronic ticket according to acquired ticket basic information, loads the corresponding ticket operation simulation model and process equipment monitoring information of a power plant process control system and a factory-level real-time information system, then carries out ticket operation flows on an operation interface which is associated with the process equipment to be operated in the acquired power plant process control system, carries out ticket operation security verification by combining corresponding security measures, generates ticket operation verification reports, and adjusts the ticket operation flows to carry out verification again until successful, carries out comprehensive and effective visual security verification analysis on factors such as execution operation, execution duration, execution results and the like of each step of the ticket operation flows, and the like, effectively carries out real-time operation risk assessment according to the fact, improves the security and stability of the real-time operation, further carries out the security verification and reliability of the ticket operation, and the security management of the two-ticket operation flows can be effectively and effectively provides the security training and training for the relevant operation and operation skills.
In this specification, each embodiment is described in a progressive manner, and all the embodiments are directly the same or similar parts referring to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments. It should be noted that, any combination of the technical features of the foregoing embodiments may be used, and for brevity, all of the possible combinations of the technical features of the foregoing embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples represent only a few preferred embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the application. It should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present application, and such modifications and substitutions should also be considered to be within the scope of the present application. Therefore, the protection scope of the patent of the application is subject to the protection scope of the claims.