Practical Design Of Portable Sound Wave Vibration Life Detector

The IP terminal of data acquisition is based on NIOSâ…¡and FPGA. With the development of the electronic measuring technology, measuring technology is geared to automated, intelligentization and network directions. Digital storage oscilloscope as the important measuring apparatus is widely used in various fields. Compared with analog oscilloscope, Digital storage oscilloscopes is gradually replacing the traditional analog oscilloscope. At present, the technology of DSO advances abroad and occupies a large part of market share in China. In our country, the development of DSO is just in its initial stage and very successful product has not been developed.This research of DSO is based on the SOPC technology, consists of sampling system, CPU system, display system, user interface, etc. DSO covers the theories of signal pretreatment, data collection, frequency detection, automatic control, analysis of frequency spectrum and dataprocessing. It has two working mode of real-time sampling and roll sampling. The two sampling modes can be switched automatically by the timebased turn-button. When observing low frequency signal, we use roll sampling solving the problem with only one spot rolling on the screen of analog oscilloscope. In addition, the system has strong data processing functions and can process the digitized waveform and save sampling data. The DSO provides users with the functions of automatic parametersmeasurement, analysis of frequency spectrum and multi-trigger modes. The user interface is similar to that of an analog oscilloscope, but with improvements that reduce learning time and increase efficiency. The research of DSO offer the auto parameters detection, cursor detection, analysis of frequency spectrum and multi-mode choice, etc to user. Because adopt the FPGA, the all digital design part are realized in the programmable logic device. Because use the rebuild technology, the circuit is flexible, easy to debug and maintain. It's appropriate to modularization design. Use Niosâ…¡as the CPU which improve the performance of signal processing, so it can process and analysis mass data of high speed. These functions fully exhibit the advantage of the DSO, also enormously facilitate the user's use. The goal of this paper is research a high performance portable DSO.