Design And Realization Of Remote Monitoring And Fault Diagnosis System For Large Machinery

The development of online monitoring and fault diagnosis system is an integrated technology involved in different subject and domain. Some technologies cooperated with diagnosis are included, such as sensor, data collection, signal analysis, data processing, database, and net transmission. A perfect fault diagnosis system should be joined with the technology of fault theory, monitoring and trend anticipation and so on. With these efforts, we can reduce the accidents, improve the work efficiency and contribute more to the nation.An online monitoring and fault diagnosis system based on Intranet was introduced in the paper. This system realized real-time data acquisition, online monitoring, the signal processing and fault diagnosis with the aid of computers. VC++, the Socket net programming, multithreading, database, MATLAB API interface and DAQ in-time data collection system were combined as a whole. Among the above, the data collection system developed with NI-DAQ can work at a frequency of 1.5MHz, and the data collection card is in full use. By using the expended function of MATLAB API, more than 10 kind of signal analysis technology have been realized. The server and client can transmit data in-time by the program of multithreading and Socket net programming, so the whole enterprise can get data anywhere, anytime, and easy to be managed. At the same time, the report and FAQ are provided in order to make the system more convenient to use. At present, the system has been successfully applied to a refinery.Compared with current remote faulty diagnosis system, the kernel technology of next generation network frame, web service, is proposed to construct the remote faulty diagnosis center. The design of the remote faulty diagnosis center is realized by C# language, ASP.NET, ADO.NET technology and OWC, Crystal Reports tools under .NET platform. The frame of remote faulty diagnosis center is shown in this paper and some critical technology details are shown in the form of example.At the end of the paper, the development and running performance of the whole design were summarized. The idea of building a diagnosis system with the use of web is shown in the paper. So we can unite the popular C/S diagnosis system with the new coming B/S diagnosis system, realize the fault diagnosis system in large area and improve the efficiency and reliability of the diagnosis.