One card system real-time monitoring of school buildings using electricity intelligence [Full text]
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Feasibility Analysis
Although the “smart electronic control system†can effectively improve the efficiency of day-to-day management, there are also the following deficiencies in terms of the system: In accordance with the relevant documents stipulated in the student dormitory management, the school provides a certain amount of “base charge†for the number of dormitories in the consumption. After the “basic power†is completed, each dormitory must be charged at its own expense, so it is necessary to provide dedicated services for this work; however, due to the large number of dormitories, the relevant dormitory number must be found during the charging operation. Students can only perform this task between classes. Work, so the business window is often queued; what is more, if there is insufficient power in the evening, there may be no electricity supply services available because no one is available. How to solve the above problems is the bottleneck of improving system service efficiency. To overcome this bottleneck, it is necessary to realize student self-charging. Obviously, the introduction of the “card system†is an effective solution to this problem. First, it has an electronic payment function. Second, it also has the ability to achieve self-service through the Internet. Has the ability to integrate applications with other application systems.
Wuxi Technology Polytechnic’s "Campus One Card" system uses the professional company's online version of the "Digital Campus Card System" and adopts "integrated" system design principles and an advanced "1 X" architecture. "One-card system" can realize docking with other application systems through various forms to achieve data resource sharing. That is, the third-party information system can obtain business data in "Campus Card System" through system docking; "Campus Card System" can also accept Business data uploaded by third-party information systems to automate management and settlement.
The one-card system and the third-party business system can achieve three connection modes: data level, functional level, and service level. In the data-level docking method, "One Card" classifies all data-related metadata fields in accordance with public data, private data, and sensitive data, and uses different levels of data for docking according to different types of data. The method of docking can be divided into three modes: "metadata level", "file level", and "database level". The metadata level docking applies to all services connected to the "one card" network, and uses open XML protocol for data. Exchange; "file-level" docking is used for network connectivity and third-party services require some sensitive data, we use mutual file import and export methods; "database table-level" docking can be used for each system to open the database table structure , The use of direct access to the database approach.
The school's "campus electronic control system" is deployed through a "campus card system" dedicated network, and the network is directly connected. Both in terms of data security and management model, it is very beneficial to the mutual access of the two system databases. It is feasible to implement the docking of two systems using the "database table level" approach.
Intelligent electronic control arrangement
The intelligent electronic control system adopted by the Wuxi Institute of Technology and Technology is an online version of the application system based on the "Campus One Card" private network. The main software features are:
1. Central database: SQL Server database is used as the core database of the system to realize the upload and download of all remote device data and the centralized processing of data.
2. Communication service program: completes the communication function with the hardware, realizes the sending and receiving of data, generation and verification of checksums, framing and de-framing of communication data packets, retransmission control of data and so on.
3. Business logic control and service program: The program uses multi-thread technology to maintain connection with hardware devices through the "communication service program" to provide various business logic services for the client program; connect with the database to control access to all data, provide Data security, reliability and uniformity, providing data backup and recovery functions.
4. Client program: Provides user interaction interface and report query. The distal end adopts the mode arrangement of "sampling module middle position data manager". The so-called "sampling and metering module" is a device that uses electric energy metering circuit pulse sampling chip for electric energy metering; "central unit" controls and manages the metering module, and can temporarily store each branch of electric power to realize and the upper level system. Integrated circuit controller for communication; "Data Manager" is mainly used to manage and control multiple "central units" in the system, realize various management functions, and connect to the network to realize remote management functions. All data of the entire system is uploaded to the central server through the "Data Manager" for unified management, enabling energy metering and power consumption management, pre-charging and automatic settlement functions, and policy-based load control and time-limited power supply. Function, because the remote uses an independent circuit arranged in each dormitory, using an independent sampling and metering module, which can effectively prevent all types of power theft and line destruction phenomenon. By arranging intelligent electronic control systems, automation and digitization of power management can be realized.
System interconnection implementation
According to the arrangement of "Campus Card System" and "Campus Electronic Control System" of Wuxi Institute of Technology, it was decided to implement the system integration application based on the system sharing scheme based on the synchronization and sharing between the two system-related data tables. In order to facilitate the implementation of the docking process, taking into account the importance of the two systems in the daily management of the campus, to minimize the impact of the system docking process on the stability of the original system operation, so the use of synchronous sharing between the middle table to achieve two System application integration. The main ideas are as follows:
1. Set up an intermediate table, and set up three identical data tables on the "Campus One Card System" application server and the "Campus Electronic Control System" server, namely, "Usage Room Information Form" and "Temporary Power Purchase Record Form". , "Historical Power Purchase Record Form".
2. The “Campus Electronic Control System†transmits the room information to the “Usage Room Information Table†and stores it synchronously in the “Usage Room Information Form†of the “Campus Card Systemâ€.
3. The “Campus Card System†provides a unified power purchase interface, and the room information is obtained from the local “Power Room Information Table†to the user; the user passes the relevant data into the local area after purchasing power through the “Campus Card Systemâ€. "In the temporary electricity purchase record table", through the synchronous storage mechanism between the databases, the relevant content is synchronized to the "campus electronic control system" related form, and at the same time, the "one-card system" local consumption data processing is completed.
4. The "Campus Electronic Control System" obtains the user's power purchase data from the local "temporary power purchase record form" and transfers it to the local "Historical Power Purchase Record Form". At the same time, the "electronic control system" completes the local purchase. Electrical data processing, such as charging the room.
5. The data of the "Historic Power Purchase Record Form" generated by the "Campus Electronic Control System" is synchronized to the "Campus One Card System" related data sheet, and the latter provides the user with the history of purchasing electricity.
Through the integrated application of the "Campus One Card System" and the "Campus Electronic Control System", the self-service ability of the campus card has been greatly improved, and the charging and payment service of the "Campus Electronic Control System" has become more intelligent and the daily management work has become easier. Student life on campus is more convenient.