| Automatic meter reading, namely AMR, is a course of automatically reading and processing ammeter data by specialized facility in which some kinds of technologies are adopted such as communication, computer network and so on.With social economic development electric power is used by dwellers popularly and the amount of electric power is used increasingly. Traditional charge of electric fare by manual labor can't satisfy the demand for modern management. Thus according to technical principle of jointing Automatic Meter Reading technology with low voltage power line carrier communication technology, we had devised long-distance electric AMRS of residential quarters. The function of AMRS is complete, its operation isconvenient, and its installment is facile.Firstly, in this paper the principles of several typical automatic meter reading systems widely used home and abroad are presented. The merits, shortcomings and scope of applications these automatic meter reading systems are analyzed. The application mode of domestic AMRS is discussed.Secondly the designing principle, modes of structure and selection of communication mode of automatic meter reading system are discussed, the scheme of the electric automatic meter reading system of residential quarters are put forward. And the hardware and software configuration of AMRS is in detail presented and its wok principle of every unit. At the same time the paper provided the communication specification, diagram of hardware and software of the system.Judging from above mentioned, we have well known the selection of ammeter and mode of communication is very important, which is directly related to ups and downs of AMRS. So later the conditions is presented that make the AMRS of residential quarters come true. To selection of ammeter,According to the practical problem during designing the AMRS, thesimple module for pulse processing is presented which is reliable, cheap and small, and it can easily be put into the common mechanical watt-hour meter. Meanwhile the article especially carefully analyzed data gathering, disposal and communications.In this paper, it's undoubtedly the most immediate and the cheapest for electric power department to adopt low voltage power line carrier communication network as under layer of the electric automatic meter reading system of residential quarters. This paper presented a general systematic view, application and current development of the power line carrier transmission technology, and clearly compared some existing power line carrier communication chip with each other. Then the authors analyze the channel' s characters of low voltage power line, and formed an abstract carrier channel model. Using this as its basis, a new kind of transmission technology is designed that adopted transmission technology combining the spread spectrum modulation with channel coding, which can solve the problems above mentioned to a certain degree, and need not pay for high cost.The energy management system of AMRS also takes on effects that cannot be sneezed at, and it is the hardcore of disposal of data information in the total system. This design of database structure is reasonable and has the characteristics of clear information classification, distinct arrangement, convenient to look up and easy to expand etc.Finally, benefits from practicing the AMRS are in detail analyzed, and according to trends of new automatic meter reading technology, and then future development of AMRS is predicted.With the development of modern electronic technology, both communication technology and computer network technology are made progress at very fast speed, and their incorporation more evolve some new mode and structure of communication, which provides more feasible possibility for realization of AMRS. |
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