Remote Machine Fault Diagnosis Technology

This subject belongs to the important project of science and technology of the Henan province for tackling key problems named remote fault diagnosis of equipment and the development of the related series of products. With the automatization, largenization, high speeding and complication of machine equipment, it is becoming more and more complex to diagnose the fault of equipments. The technology of equipment monitoring and fault diagnosing is an integrated technology and involved in comprehensive knowledge. The fault detection technicians have to be very proficient in the field. The people on locale could not know all the faults. If an unusual fault happens, he could not solve the problem. Sometimes it is too urgent for the expert who is far from here to come for the interval between the fault symbols appears and the machine breaks down. Can we find a way to send messages of the locale to experts and experts send back diagnosing results to guide the people on locale to tackle the problems? Thanks to the technology of modern Internet and communication a new way is developed. It is the so-called technology of remote fault diagnosis. The main project of the thesis is to discuss how to realize remote equipment fault diagnosis by combining the technique of modern network with that of the present fault diagnoses.Three aspects are discussed in this thesis. The first is how to choosing the software flat, the second is to build a fault diagnosis system of three models, the last is to set up a remote instance querying system and remote signal processing system which are based on Browser/Server system and to define a standard data file.Firstly, the thesis discusses how to choose the soft flat by considering three aspects, which are operation system, server software and database server software. It is easier to configure and operate Web Server and FTP Server by using Windows 2000 Server than Unix or Linux. Windows 2000 Server is suitable for laypeople. So we choose Windows 2000 Server+IISS.O as the primary operation system. SQL Server runs under Windows NTY2000 and isIcompatible with Windows Operation System. It is easier to maintenance a large database, lower price and more suitable for the enterprise which is not good at database.Secondly, the thesis describes some useful protocols of TCP/IP such as SMTP, POP3, FTP and HTTP. According to these protocols, three models of remote fault diagnosis is proposed and classified into easy remote fault diagnosis, Net meeting fault diagnosis and integration remote fault diagnose such as B/S and C/S by how to realized the models. Ftp or E-Mail is used to transfer fault data file in the easy fault diagnosis which is only to transfer easy data file. Two types of net meetings and desktop net meeting are realized in this thesis.Comparing with the traditional C/S, B/S, the thesis provides a over-flat and coherent circumstance for browser, separates the program from application avoiding to develop several programs for different operation system .It is convenience to expand, maintenance and manage the system and also has a high efficiency for remote fault diagnosis. In this model the browsers who access the web sites can supply a lot of useful message that can be used to advance the veracity of fault diagnosis. B/S also integrates many other Internet service such E-Mail and FTP. But the operation of this model is not flexible because the fault diagnosis center is passive and only can diagnose the fault when the browser uploads the data file. The server could not get data file from the browser actively and could not monitor the equipment onlinely. But the model of C/S can fulfill the real monitoring onlinely. In this model the server can actively get some data files that is relative to the fault, so the server can have an accurate analysis of the machine fault, but this system is not an open system.In the C/S system, some useful TCP/IP protocols and how to realize these protocols are dwelled on. Actually different protocol is realized by using Socket to listen different p...