Research And Design On The Remote Monitoring System Of Large Public Building Comsumption

With the larger amount of construction and the higher demand in living conditions , more and more attention is being paid to Building-energy-saving in china. Among building consumption, the consumption of large public buildings is most notable for their unit area consumption. The situation of energy wasting is serious in large public buildings. And much could be saved. Reducing energy consumption not only helps the company depress cost, enhance competitiveness, but also helps the social economy develop sustainedly and healthily. It's a pity that, due to the lack of systemic, credible, and accurate consumption data, the design of new construction and renovation of old building for energy-saving can't be supported and directed.The final target of large-public-building-consumption monitoring system discussed in this paper is to construct a statistics platform for large building end consumption, to analyze the characteristic of energy consumption, and to provide scientific data support for the implementation of energy-saving method and enactment of energy-saving code. The paper firstly introduced the structure of monitoring system, and then studied the implementation of each part in the system. The monitoring system was divided into three parts. From low to high they are data collecting, data transmitting and data manage. Each part is independent to some extent, and changes in one part wouldn't affect others.Consumption database acts an important role in the monitoring system. To convince the statistics and management of energy data, tables in the database were divided into two categories: original tables which oriented at data collecting system and synthetic tables which oriented at data analyzing system. The latter analysis of consumption only needs data in synthetic tables which have none direct relation with the data collecting system. Thus the variety of data collecting system wouldn't affect the consumption analysis. The division of energy data tables facilitates the building of consumption analysis open-system.In this paper, the proper network architecture the collecting system should adopt was analyzed. The employment of Modbus protocol in bus-type network was introduced, and the ZigBee technology in wireless network was mainly studied. In the explanation of data transmitting, the two communication methods were compared: directly connected to Internet and using GPRS to connect. AT commands to communicate with GPRS module were provided, and the relevant communication programs in the server were written. And energy data statistics-analysis software was designed and realized. Using the software could expediently query the building status and the consumption of equipments. Using the software may also make some analyses of the building consumption using user-def variables. At the end of paper, a wireless demo system was built for experiment.