Design Of Urban Network Of Drains Data Acquisition System

After successfully holding the world amazing events like Beijing 2008 Olympic Games and China's 60th National Day Celebration, Beijing has been making continuous efforts to become a modern metropolis. As the infrastructure of the city, the construction and development of urban drainage network can represent the modern management level of a city. Therefore, a real-time monitoring system for Beijing drainage system is needed to be set up; which can help us grasp the operation status of the urban drainage network more efficiently and more accurately; and also help us better understand and analyze the status and timely solve the problems.As a crucial part of the Operation and Monitoring Center of Beijing Urban Drainage Facilities and Geographic Information System, the pipe network data-collection system supports the construction of GIS system and data-base management of Beijing urban pipe network. Basing on the urban-wide pipe network distribution, the corresponding ultrasonic flowmeter and ultrasonic level meter are set up at 122 monitoring sites. The data of flow and liquid level in the pipe network will be timely collected and be transmitted to internet via GPRS (GSM network) and then be uploaded to the pipe network data workstation with a static IP address. The date will be saved in a particular database where it can be easily extracted and analyzed by the upper system.By the way, let me show you what and how we do in this paper. For the sake of introducing the design and development process of the on-line sewer-line monitoring network based on the remote distributed GPRS (OSMNRDG), this paper is divided into four parts. First of all, we analyzed the practical significance in real life of the on-line sewer-line monitoring network based on the remote distributed GPRS. At the same time, we understood the status, advantages and shortcomings of such technology both at home and abroad, as well as some technical base that is related to the target system we aimed at. And theses correlative technology includes the sensing technology, GIS (that is Geographic Information System), DCS (distributed control system), GPRS (that is General Packet Radio Service), and so on. After that, we made in-depth analysis and research for the sewer-line monitoring system needs of the firm. Through that we nailed down the final task of the design. Above all, we worked out the whole design plan of the system, and then we designed from two aspects, the hardware deployment and the software deployment. Between the two parts, we made our focus on the software design and development, which comprises the communication software and the application software. In the software design, we have elaborated designs of a number of communication protocols and modules (such as the command platform-digital operating box and communication protocols, the monitoring system-SMS module and communication protocol, the GPRS module). More than that, we have done a description of how to build the database step by step at great length. Just because the database of pipe network is to accommodate a great number of varieties of information, it must be very large. For this reason, it is impossible to make a complete design all at once. Therefore, according to the goal of the database design, we begin with the overall system data model design, then logic model design of system data sets, and end up with the relational data structure design. In addition, the authority, the classification of level, the division of scope, the granularity of access and coding approach of the system users and the role had been designed. Whereafter, we integrated and debug the designed system. Of course, in the process, we found some problems. In spite that some of these problems are a little difficult, we carried out some corresponding explanation and description of them all the same. Obviously, we also obtained some experience. In the end, after completing the design and development work of sewer-line monitoring network, we summed up the experience and lessons throughout the design and development process, which may be good to some people, who will do some design or program. What's more, we did a bit of prospects for the future at last.As the introductory section, the first chapter of this paper discusses the significance of constructing data-collection system of urban drainage pipe network. The current situation regarding the foreign and domestic application of this technology and the present disadvantages is also included in this chapter. Chapter Two gives a general introduction to the technology of the system and introduces the mature relevant technologies such as sensing technology, GPRS and GIS, etc. Chapter Three gives a detailed description of the realizable functions of this system, according to customers' demand. Chapter Four focuses on a general design scheme, including the structure of the system, protocol analysis and design, and analysis of the system networking and integration scheme. Chapter Five describes the hardware integration of the system in details. Chapter Six explains the software design of the system, including communication software and application software. Chapter Seven introduces the operation and running test of the system. Chapter Eight comprises the conclusion and summary of this paper.This paper focuses on the design and application of the urban drainage pipe network data-collection system, which is aiming at utilizing available resources and providing reliable service to customers. The scheme in this paper is of high practical value and wide applicability..