Based On The Key Technologies Of Dsp And Embedded Technology Equipment Inspection System

In the engineering field, there exists a great deal of vibration, and at most occasions the vibration is harmful. It works on normal work of the plant, and when the vibration is severe it will lead to plant failure, even casualties etc.With the advancement of modern science and technology, the demand at running speed and bearing capacity and working life of various machine is more and more rigorous, and the harmfulness of vibration is acquainted more and more deeply, as a result the study of vibration measurement and signal analysis is needed more and more stern. Unlike the large rotary machine online system, portable itinerant checking equipment is mainly used on the occasions when it is unsuitable to install online system. The portable itinerant checking equipment can realize the multi- channel collecting and saving of vibration signal and the function of processing simple signal. Its applied range become more and more extensive because of its practical and simple character. For the moment most foreign portable equipments are costly, and domestic portable equipments have at large the shortcoming of small memory capacity and slow response speed and bad human machine interface etc. Base on the status we combine combines DSP chip and embedded system technology with vibration signal-testing technology, and design the instrument for the vibration signal itinerant checking according to those theory and technology.DSP chip which is so called digital signal processor is a micro-processor, it adapts to process digital signal especially, and its main application is to realize various digital signal process algorithm fleetly and timely. Embedded system focuses on application and bases on computer technology, and its both software and hardware can be cut out freely. Embedded system is the professional computer system which can meet on various demand of system, for example function, reliability, cost, volume and power waste. Embedded real time operation system (RTOS) is used in this thesis.For this instrument, in hardware, it bases on TMS320LF2407A DSP chip. AD7864, the main chip in the A/D module, and SED1335,the base of the LCD module, and CompactFlash Card centering on the data memory module are all assembled in it. The signal pre-conditioning is also assembled. In software, we transplant the real time operation system of uC/OS-II, write the driver source code of various modules and the algorithm source code of digital signal processing.By circuit emulator, it is demonstrated that the hardware circuit of the instrument is reasonable and reliable. The software emulating result basing on IECTEK F2407 - A emulator of Beijing RealTime Creative Inc. shows the validity of the key algorithm program and the driver program.