| When it comes to equipments condition monitoring and fault diagnosis, an in-depth data analysis,processing and fault diagnosis is necessary for devices at the same time of information collection. To be able to collect the complete and comprehensive fault information, diagnostic systems should monitor the equipments on line,collect and process the data continuously,analyze the fault types. According to the need of modern enterprises, fault diagnosis systems should have smaller and smaller sizes, if the systems can be carried, they will be used most flexibly and conveniently. To this end, a semi-online fault diagnosis system on OMAP5912 was researched and developed, which combines the advantages of off-line fault diagnosis systems and on-line fault diagnosis systems, and it makes up for deficiencies of both, forming a new type of diagnostic system that can meet the market demand.The system is based on the advanced OMAP5912 hardware platform, and it uses open sourced,portable embedded Linux as the operating system, forming a unique,excellent hardware and software architecture. To achieve the main functions and corresponding performance indicators, application software modules were developed based on the hardware platform in this paper. The semi-online fault diagnosis system based on OMAP5912 platform requires fast response speed,dual-core coordination and sound data processing algorithms. As a key application software of the system, data acquisition and processing program should have all of the above features. ARM considered respectively data acquisition task and dual-core communication task as two threads to improve the response speed of the semi-online fault diagnosis system by the multi-thread technology programming. Through the vector spectrum fusion algorithm in time domain, DSP extracted fault features of the equipments accurately,analyzed the fault types and processed the data acquired in ARM's side. The system can handle a variety of complex applications, which need to transmit a large amount of data between the dual-core and achieve flexible ARM control of DSP. DSP Gateway was selected as the dual-core communication software and was researched to solve the problem above. The dual-core communication application was developed through DSP Gateway software on the system, and the application achieved rapid transfer between data collected and data processed by global shared memory. At the same time, user programs on ARM can control DSP tasks through system calls. Therefore, the dual-core achieves coordinated operation efficiently, and the semi-online fault diagnosis system improves real-time performance and reduces power consumption significantly. The graphical interface application was designed, while the critical module development of system software platform was completed, achieving a friendly man-machine interface by MiniGUI graphical interface support system. MiniGUI application development provides the semi-online product with a map display system, which has high performance,high reliability and excellent stability, and the display system supplies an excellent interface support for equipment condition monitoring and fault diagnosis. |
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