Research Of The Hardware Platform Of Quasi-online Diagnosis System Based On Architecture Of ARM+DSP

With the development of fault diagnosis,as well as the breakthroughs and improvemnet of sensor technology,microelectronics,computer, communication in network and other related technology,fault diagnosis instrumentation and system are evolving towards perfection.The reliability of fault diagnosis system is increasingly emphasized in the engineering practice,as well as the application of intelligenc-e,network and the intergration of fault diagnosis and machinery management. Contrary to strengths and weaknesses of two common types of fault diagnosis instrument,on-line fault diagnosis system and off-line fault diagnosis system, a kind of quasi-line fault diagnosis system is designed in this thesis.The quasi-line fault diagnosis system is mainly applied for a long time condition monitoring and diagnostics to machinery who have not been monitored by an on-line fault monitoring system.In order to be used for a long time condition monitoring and diagnostics,it has a certain capacity of data analysis in time and a mass storage for data.In the same time,it inherits the advantages of lightweight and flexibility of portable fault diagnosis instrument,so it can be used flexibily,or be installed to work for a long time.Based on the functional requirements of the quasi-line fault diagnosis system,the work completed in this thesis is showed as following:The overall design of the system. Based on the microprocessor of OMAP-L138 with two cores(ARM core and DSP core),several modules are designed with the embedded Linux being used as the operating system to meet the functional requiments of the quasi-line fault diagnosis system.Development of the hardware platform. Based on the use of the abundant interfaces of the OMAP-L138 microprocessor for peripheral devices, several modules are designed,which including data acquisition module, storage module, human-computer interaction (LCD display and touch screen), power management module, communication module, and the realization of two-machine combination. Construction of the software platform. The drivers of system are analyzed,and the driver for data acquisition module is introduced specially.Based on the existing software resources,the bootloader of U-Boot, the kernel of the embedded Linux and the JFFS2 root file system are modified,configured and compiled,in order to construct the softwae environment for the quasi-line fault diagnosis system.