System Research Of Fiber-Optic Interferometer Current Sensors Theory And Signal Processing

With the level improvement of power supply voltage and current, the system measurement and protection precision should also be enhanced. Fiber-optic current sensors integrate modern electronics and optics technology, and have been gradually accepted in the power engineering field for its high precision, high reliability, wide responsive bandwidth characteristics and so on. The research of fiber-optic current sensors is of great importance in both theory and engineering fields.The significance of fiber-optic current sensors research and its development is first specified. The sensor theory, the basic structure and work principle of closed-loop fiber-optic current sensors are introduced.Based on that, a kind of closed-loop digital fiber-optic current sensors which combines interferometer technology with sensor technology is designed. Then physical and dynamic models are built, a digital controller aimed at the static and dynamic performance of closed-loop system is designed, the design and the simulation experiment of the whole control system in MATLAB/SIMULINK environment are conducted.The system hardware and software design are given according to the digital closed-loop control system. The design is discussed in detail, including the A/D convertor, D/A convertor, DSP control system, etc. The software design are also introduced, the integration development environment CCS2.2, FLASH, CMD and BOOTLOADER are analyzed.Finally, the project scheme is analyzed deeply. This method of design has the advantages of credibility, large measurement range, high precision, simple structure and easy practical application. It has extensive practical value in power supply system.