Fiber Grating Demodulation Instrument

With the rise of the Internet content, the sensor layer, network layer, more and more pressing needs of the application layer, especially its core sensor layer, need to the current technology greatly upgrade. In some special field, the traditional sensing have already can't meet the requirements, need more appropriate sensor and demodulation system.Optical fiber sensing and traditional electricity than sensor, have without electricity sensing, without power of transmission unique advantages, make its have not affected by electromagnetic interference, the essence of the nature of the security. In petroleum and petrifaction, traffic tunnel, special occasions such as the perimeter security area has the role that cannot be replaced. This one fiber grating sensor is the focus of the present research, they not only can sense a temperature, still can make all kinds of packaging perceived stress, strain, acceleration, physical quantities such as tension, breaking the use of optical fiber sensing the limitations of before, have the very wide application prospect.This paper discusses the present fiber grating sensor system do the overall introduction, and based on this, design a kind of optical fiber grating demodulation instrument. First the system requirements for analysis, which can meet the demand to discuss the design of the whole organization and instrument circuit specific parameters for the detailed calculation and theoretical analysis, and the practical circuit testing results are given.In the design process, special of fiber grating demodulation instrument of problem of the imbalance of spectral density made to, this paper puts forward the solutions. Several photoelectric circuit design, not only have the theoretical calculation and test results. The test results show that the entire instrument completely meet the design requirements.