1 System Overview The main purpose of the urban water supply monitoring system is to address the data collection and monitoring of water supply companies at all points of the water supply monitoring system. The system is composed of a monitoring center and various water source monitoring points. The data collection terminals (RTU or PLC) of each water source monitoring point can monitor and collect various data such as water level, pressure, flow, and residual chlorine for analysis and control by the control center and related departments. Decisions are taken to increase work efficiency, guarantee the quality of water supply, and meet the demand for increasing water production.
The urban water supply monitoring system requires the management of various water plants, including a central control room, a five-pump station, a pressurized pump room, a second pump station, a three-pump station, and a four-pump station. The urban water supply monitoring system can monitor and control the remote on-site operating equipment to realize the data transmission of pipeline pressure and water flow and the automatic control of the valve switch, which reduces the failure rate and improves the reaction time to the system. Facilitate timely and prompt understanding and control of remote pipes and valves, low failure rate and overhaul time, reducing the number of water stops. The data collection terminal of each water source monitoring point can automatically collect data such as real-time data and switch status of pipeline pressure and water flow, and the information is transmitted to the monitoring center of the central control room. The monitoring center can analyze the data transmitted back and find the fault. The location, so that when a remote failure occurs, it can solve the problem in the shortest time, restore water supply, improve the overall level of service, thus achieving the city's water supply information and modernization.
The use of wireless communication in urban water supply monitoring systems has the advantages of low investment, short construction period, simple operation and maintenance, and high cost performance.
2 System Components The whole set of urban water GPRS solution uses a 4-layer network structure, which are:
1. Distributed bottom layer The terminal layer distributed bottom layer is composed of LQ8110GPRS transmission module, EDA9017 analog acquisition module, EDA9150A digital acquisition module and V-shaped pool.
2. GPRS communication network communication layer, through the GPRS network for data acquisition and transmission.
3. The data acquisition and distribution server data acquisition and distribution server is responsible for the data collection, processing, alarming, storage and other operations, that is, the relevant data processing part will be carried out at this layer, and the data will be published through the WEB Service interface on the WEB server to achieve B/S seamless integration.
4. Internet/Intranet information release network (customizable)
The information release layer, through the WEB Service interface, can directly access data through the Internet/Intranet to achieve remote WEB access, so as to achieve in addition to the local workstation control, but also in any location can access the Internet, arbitrary choice of WEB workstations to achieve off-site Remote control acquisition part: It adopts an LQ8110GPRS wireless transmission module, two EDA9017 analog acquisition monitors, two EDA9017 acquisition modules, and an EDA9150A digital acquisition module to collect the pressure, water level, flow rate and voltage in real time. Parameters and other data, and data parameters to the GPRS network. Realize the transparent transmission between the bottom acquisition device and the data acquisition server. You can use TCP/IP or UDP. UDP is recommended for large numbers of applications.
GPRS communication network: Uses the mobile company's GPRS network for wireless data transmission.
Data Acquisition and Distribution Server: The main use of SCADA software, mainly include: 1, GPRS data acquisition services (Windows service) 2, data publishing web services 3, Web Service interface; database using SQL 2000 support. In order to achieve data collection and processing and release a series of work.
Workstations: Responsible for system information release and device operation, using the Client WorkStation software, consists of two types of workstations: 1, remote workstations; 2, local workstations; workstation software using WEB; remote workstations support remote remote operation through the Internet; Local workstations access the local Intranet for operation.
3 system function
1, with real-time, time-sharing, regular collection of flow, pressure, water level and other parameters of the function; from the power pump and other data acquisition test / control mode
2, V-shaped pool function (can be customized)
Communicate with Mitsubishi FX series PLCs on site via RS485, and negotiate specific requirements.
3, manual call test function
The data of the monitoring point can be actively extracted on the workstation at any time.
4, data reporting
Automatically generate daily, monthly, and annual reports, as well as statistical reports and printing at any time. You can set the automatic print function.
5, automatic analysis and calculation
According to the monitored real-time data, the data such as accumulated water consumption, etc., need to be analyzed to generate an alarm for an abnormal situation; it can be plotted by day, month, and year, and the trend graph of each historical data can be calculated. Instantaneous flow curve, pressure curve, water level curve, etc. at the monitoring point can also be plotted in real time.
6, data storage backup
The system database can be stored locally, and its storage time is determined according to requirements and computer configuration. The system provides data backup capabilities and can easily manage database data.
7, fault automatic alarm function
The urban water GPRS monitoring system developed by Shandong Lichuang Technology Co., Ltd. System Integration Branch has a self-check function. Self-inspection faults can be automatically uploaded through the GPRS module; the flow pressure and other collected data are used to make alarm judgments in the data acquisition server. In addition to the super alarm limit alarm, a variety of state judgments can also be made based on the parameter values, such as shutdown, short circuit, overload, arrears and a series of alarm information.
8. System self-diagnosis capability After a problem occurs, it can be judged by the system's self-diagnosis function on any workstation. The fault self-diagnosis can diagnose whether the underlying hardware is normal, whether the communication network is normal, and whether the server group is normal or not. .
9, system expansion and upgrade
The system has an open data interface to facilitate the addition and expansion of later monitoring points.
10, system security rights setting function
Permissions settings provide comprehensive security authentication, illegal users can not enter the system, legitimate users can perform corresponding operations according to permissions.
11, system operating costs, system operating costs: The system according to the data flow fee. There are currently two types of fee-based charging systems, namely the monthly subscription system and data flow. Please consult your local mobile office for specific charges.
4 program advantages
1. The system has good scalability and extensibility. The system structure can be constructed according to actual needs. For complex applications, system integration can be modularized to quickly adapt to changes in requirements. For the number of monitoring points, you can reduce or increase the number of server group servers
2. The system achieved seamless integration of B/S and C/S structures.
The system has multiple modes of workstation mode, which can use different workstation modes to meet the needs of different users, effectively solving various problems caused by various situations such as the network.
3. The system has remote remote operation capabilities.
The system can facilitate the user to carry out the mobile office work, mainly able to access the Internet, can operate the system, be able to understand the system information anytime, anywhere, and is convenient for travel.
4. The system complies with the water user's operating specifications.
The system considers the actual operation mode of the water conservancy user and makes a certain optimization of the system. It is in line with the operation of the water conservancy user and can be quickly started.
5. The system provides a data interface that allows easy access to other systems.
In the framework of the solution to fully consider the integration of the original hardware equipment and application software systems, or later upgrade of the new system, so that the use of the solution to build a new system to maintain a smooth transition to the original system, protect the original investment; At the same time, the solution provides powerful data source management functions and various standardized system interfaces that can be effectively integrated with other systems.
6. The system achieves efficient internal data access and data exchange with excellent real-time performance.
Real-time performance is a key factor in the evaluation of the system's strengths and weaknesses, and it is also a key indicator of customer evaluation. The solution enables efficient data access and data exchange within the system, and the system has excellent real-time performance.
7. The software and hardware design of the solution runs through the system's well-maintainable concept, making the implementation of the solution highly efficient and quick and easy to maintain in the later period.
8. The system has a good security protection mechanism.
The premise of the normal operation of the system is to ensure safety. The security factors involved in the system are numerous. Relying on advanced technologies and powerful system capabilities, the solution integrates security technologies, business data processing security technologies, firewall security technologies, database security technologies, and many other security technologies to ensure the entire security chain. The solution is safe and reliable.
9. The system has good maintainability.
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