| In view of the traditional portable vibration analysis apparatus's poor function of data-processing and off-line fault diagnosis system's inconvenience in field application ; this paper describes developing a new type of off-line fault diagnosis system by the use of embedded software and hardware technology, such as OMAP dual-core processor and embedded Linux operating system,. The use of embedded technology making the system is not only portable but also has strong data-processing capability. In the paper we discuss the functional requirements of off-line fault diagnosis system, the selection of software and hardware platform, the building of cross-development environment and data collection and fault diagnosis program based on dual-core communications with the reference of the successful experience of developing traditional portable vibration analyzer and off-line fault diagnosis system.In order to speed up the development progress of this issue the OSK5912 development board is used as the heart of the system which based on the OMAP5912 processor. According to the data collection's requirements of multi-channel, high-speed, real-time, we discuss the general design principles and requirements as well as design the data collection modular in the consideration of the need of machine fault diagnosis. In addition, we can expand touch-screen and LCD modules by the use of the expansion of core board and develop GUI system in order to facilitate users.Because embedded operating system not only has small size, but also can be arbitrarily cuted by need, which can make best use of embedded systems's limited hardware resources to achieve the user's functional requirements. For the advantages of Linux operating system-open-source, free, robust and supporting multi-platform in embedded field which make it more and more popular; we can get a embedded Linux operating system which can satisfy the requirements of the software and hardware through cross-compile and cutting Linux source code. Due to the existence of operating system, it is necessary to develop its device drivers for our own data acquisition module designed by ourself.Because of OMAP processor's unique dual-core architecture, its development is divided into two parts correspondingly, which reqires us to build a suitable cross-development environment. We construct embedded Linux cross-development environment and DSP development environment based on DSP gateway making preparation for the development of dual-core communications-based applications. Although ARM processor is able to complete the taskes such as running operating systems, system control, but when come across digital signals processing, it will be slow and energy-consuming; DSP processor is designed for digital signal processing, it has the high speed and low power consumptionin when run digital signal processing program which other processors can not compare with. The contradiction can be resolved easily by the use of OMAP dual-core processor; we can distribute affairs-intensive task to the ARM processor to complete meanwhile distribute heavy compute-intensive task to DSP processor to complete, through the development of dual-core communications based data collection and processing procedures, the system can achieve the high-speed data collection and real-time data processing.In this paper, the relevant work has been verified on OSK5912 board, software and hardware can run normaly.In conclusion all we do has laid a solid foundation for the latter part of further research and development. |
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