Design Of Remote Maintenance System For Flow Meters Based On GPRS

Flow meters are widely used in the industrial and other areas. Shortcomings is obviously in traditional corrective or planned maintenance for flow meters,such as low efficiency, high cost and long time delay,especially in those remote and harsh environment.Based on the analysis of existing eaxmples,a remote maintenance system for flow meters based on GPRS was designed in this paper. It is composed of four parts: a remote maintenance center, a communication network,a multi-functional wireless gateway and flow meters in field.The main contents of this dissertation are as follows:(1) Introduced and summarized the development of remote maintenance systems, and compared the advantages and disadvantages of various communication and maintenance methods.(2) Completed the design of maintenance system which has advantages of low operating costs, well real-time performance, fast anomaly detection and good universal property,etc.(3) Developed a multi-functional wireless communication gateway, and gave details of the programmings of the CC2420 driver and gateway under Linux opration system.(4) Designed the softwares for server and gateway's configuration.The main features or innovative points of this dissertation are as follows:(1) Presented a new design ideas in which gateway has the functions of datapre-collection, abnormal status detection for field instrumentations and real-timetransmit for burst data. (2) Accepted a new method of setting gateway's function by configuration way in order to improve the interoperability of gateway for flow meters with different communication protocols.(3) Dual wireless technology that can simplify wire connections was used in system. GPRS for remote communications,and RF wireless for short-range communications between the gateway and flow meters.