Hardware Design Of A Optic-fiber Data Acquisition System Based On ARM9

With the development of optical communication technology, some technology of optical communication is gradually applied extensively in the field of sensor technology. One of the applications is based on optical fiber sensing technology. Having high reliability, high sensitivity and resistance to electromagnetic interference and corrosion resistance, reuse and many other advantages, fiber sensor plays an important role in the military, national defense and security monitoring.Combined with the widespread use of embedded system, the fundamental principles of Sagnac fiber interference technology provide a platform for the application of optical fiber sensing technology, which makes optical fiber demonstrate more technological in the intelligentization of perimeter security design. This paper integrates embedded system and optical fiber sensor technology, and designs a data acquisition system for the backend of Sagnac fiber interferometer signal processing.This paper introduces the development and application of optical fiber fence prospects in external and internal, Combined with the internal problems of technology, puts the requirements of system design and explains the structure of the system from the perspective of hardware design, principle; in which explained the features of some key circuits, work principle, requirements of design and realization of hardware, from the functions, the principles of design are explained. The hardware component of system is constituted by the ARM9 and FPGA chips, not only the ARM9 core, Meanwhile, exposits the implementation of hardware in FPGA design and in the back section, simulats the algorithm in the FPGA to decide whether is reasonable and analyze discuss waveform.Finally, concluding the function of this system and giving brief overview of deficiencies existing in design!...