Incessantly long-term real-time detection of temperature is demanded in weapon depots, where the weapon
equipment is stored in, to realize the self-regulation of temperature. Long-Distance intellectualized control can be
actualized by setting sensor-net which is composed by several temperature sensors to simultaneously detect
multi-point and multi- parameter. The temperature sensors based on Fiber Bragg Grating Technology are more
suitable for long-term detection for their preponderance in high sensitivity, small volume, anti-jamming and so on.
The temperature sensing system, which is composed by several Fiber Bragg Grating sensors in one light-cable, can
accomplish Quasi-Distributed measurement and is suitable for multi-point and multi- parameter detection. Basal
principle of Fiber Bragg Grating sensing technology is expounded in the article, with a sensing system applied to the
long-distance detection of temperature in the depots is designed based on F-P Scanning Method. Besides, DSP and
FPGA are adopted pre-treat the transformed data from AD such as filter and determine threshold. The main modules
of this demodulation system such as 1550nm exact photoelectric detection module and trigonal wave voltage scan
module are designed in this paper to realize demodulation. Proved by the analysis of the testing data, the Fiber Bragg
Grating temperature sensing system, whose testing precision achieved the design purpose, has advantages of
real-time measure and long-term stability. The system, which provides guarantee to realize the auto-control of
temperature, can be generalized and will provide favorable foundation for the broad using of Fiber Bragg Grating
sensing technology in the army.