Design And Research Of Master Station Of Automatic Meter Reading System Based On GPRS

Using computer technology and communication technology to read and process data sheet automatically is to improve the level of automation of the management of energy consumption, and the needs for rapid development of computer technology and communication technology. It not only can reduce the labor intensity of meter reading, save human resources and reduce the meter-reading error causing by human factors, but also have the advantages of high speed of meter reading, real-time of meter reading, data sharing and so on.In order to reduce costs and improve the quality of communication, the software management system based on GPRS automatic meter reading is proposed in this paper. Then, Four key technology of the automatic meter reading based on GPRS are also studied. These four key technologies are GPRS technology, ORACLE database technology which is related with management software, SOCKET communication technology and the technology of thread pool and database connection pool. What's more, the structure block of the automatic meter reading system based on GPRS is given in this paper. And by this structure block, the operating mode of the automatic meter reading system based on GPRS and the functions of the various components is introduced in detail. According to the distribution of various components in the automatic meter reading system based on GPRS, this paper bring forward a program that using GPRS network to make long-distance communication between the computer main station and centre device, using 485 bus or carrier wave to make communication between centre device and collecting device, and using 485 bus to make communication between collecting device and meter. Finally, the network structure of the main station is given in this paper, which shows the relationship between the various modules, as well as the role that these modules played in the entire software. Further more, this paper brings forward the design plan of the two important modules (database server and communication server). In the design of the communication sever, according to the feature that data are reported at the same time from the centre device in the actual environment, this paper put forward the"request - service"model and"waiting for– waking up"model, which can avoid the bottlenecks when we accessing database. Combine with database connection pool technology and thread pool, the performance of the system has been improved in further.