The Design And Implementation Of Remote Monitoring System Of Central Air Conditioning

Currently,most of the central air-conditioning systems use decentralized control technology,and each controller can only monitor and control the status of one air conditioner.Obviously,there will be a bad effect on the intelligent management and the reduction of energy consumption of the entire system.With the development of embedded technology and network communication technology,many new SCM system chips with higher performance and lower prices have appeared on the market,while the reliability and real-time ability of network communication technology is becoming higher.Therefore,these new chips and advanced network communications technology can be applied to the remote monitoring of air-conditioning systems,which can effectively improve the performance of the system.The thesis has made some research on the design problem of remote centralized monitoring system of central air-conditioning based on ZigBee technology and Web technology.The system is the remote monitoring system based on B/S architecture model,which will manage large numbers of terminal equipments such as fan coil in a unified way.Users can interact with the system through a browser,and monitor and control the system status quickly and effectively,in order to reduce energy consumption and waste.On the monitoring site of the system,the enhanced STC 51 single-chip microcomputer is used to design the intelligent gateway with Ethernet connection function and the intelligent temperature controller distributed in each room.The circuit diagram is also given.ENC28J60 Ethernet controller is adopted by the intelligent gateway to realize the Ethernet interface.Thus,the system status data can be uploaded to the monitoring platform and multiple air conditioning systems can be remotely and centrally monitored when the building distribution is more dispersed.Intelligent temperature controller is responsible for collecting the real-time temperature and the fan running status data inside the room,and it can realize the real-time control of running state of fans according to the advanced control logic or control command distributed by monitoring platform,in order to achieve the purpose of saving energy and reducing system consumption.CC2530 series ZigBee chip of TI Company are adopted to design the wireless data transmission network between the intelligent gateway and intelligent temperature controller,which realized real-time and reliable wireless data transmission.The technologies such as JSP and AJAX are used to design the Web service application,which provide a unit,simple and beautiful interface between the user and the system.Thus,the user can login in the system through a browser,and the running state of the system can be monitored and controlled by the user in real time.MYSQL database technology is used to realize the persistent storage system for operation data,and the user can view the historical data at any time.The application program of the automatic monitoring system has been written,which can make the system to run in a reasonable condition without human intervention and timely eliminate the possible electric energy waste in system.At last,the thesis summarizes the whole researched works,and points out the further research direction in this field.