| The technique of monitoring and diagnosing equipment is the key technology toguarantee their safe operation and scientific maintenance. It can bring obviouseconomic and social benefits. With the development of mechanical industry, thedemand of the system of monitoring and diagnosing equipment is on the increase.In this dissertation, we have developed the portable system for conditionmonitoring and diagnosing aiming at the actual demand of the factory equipment.The system adopted the distributed structure of principal and subordinate, and usedthe embedded dynamic signal measurement and analysis system as the terminalstation. It was designed with the object-oriented theory and developed by themethods of ODBC, DLL, MFC, API, FTP, multithreading and serial communication,etc.Firstly, the developing status and theory of the fault diagnosis technique wasstudied. According to the practical needs of the factory, the system's whole structuraldesign and functions were presented. In this dissertation, the function of dataacquisition and signal analysis was described in details.Secondly, the key technique of this system was studied. The signal analysisfunction based on XPE was developed by the technique of object orientedprogramming (OOP) and dynamic link library (DLL). And we had taken the largesample data analysis as an example to discuss the way to realize the function. Adatabase model for information management is set up by abstracting andsummarizing the complicated equipment information based on theories and methodsof database design. We developed the equipment management function and used it asthe interface between user and system. It became easier to develop, maintain andexpand the system with the above techniques.The dissertation set forth the principle of communication between the upper andlower location machines. There are three ways such as serial port, U disk andnetwork to accomplish the data file transmission intelligently on the basis of theroute file. The automatic management of measured points' routes was also achieved.By making measured points in correspondence with channels in the portable system,it can automatically store the data in correct destination, and lower the request forusers. Some auxiliary functions of the system have been provided to help users, suchas strong help system, setting up the time and IP address.Finally, with the practical application to the armored vehicle vibration, thesystem is proved to have structural compactness, light weight, easy portability, andsimple operation. It can manage the equipment information well, acquire and analyzesignals correctly, realize automatic route management and transmit the dataintelligently. |
