海洋温度监测对于研究和保护海洋生态环境具有重要价值, 在防止海洋自然灾害的发生方面有着极重要的实际意义。传统的电传感器远距离供电难, 且难以满足大规模传感网络的复用需求。基于弱光纤光栅阵列的干涉式传感系统平台, 提出了运用相位生成载波(Phase Generated Carrier, PGC)算法解调温度信号的干涉式高精度温度传感方法。在26.00~30.00 ℃的范围内连续升温测量, 温度相位灵敏度为1 132.6 rad/℃, 皮尔逊平方相关系数R2为0.999 3, 理论上温度灵敏度可以达到0.000 1 ℃。结果表明, 将常规用来解调动态信号的方法应用到温度这种准静态信号的解调中, 能实现高灵敏度探测, 在海洋温度监测应用中有较好的应用潜力。

Ocean temperature monitoring is of great value for the study and protection of marine ecological environment and of great practical significance in preventing the occurrence of marine natural disasters. Traditional electric sensors are difficult to supply power at a long distance, and it is difficult to meet the multiplexing requirements of large-scale sensor networks. Based on the interferometric sensing system platform of weak fiber Bragg grating array, this paper presents an interferometric high precision temperature sensing method which uses phase generated carrier (PGC) algorithm to demodulate temperature signals. In the range of 26.00~30.00 ℃, the temperature phase sensitivity is 1 132.6 rad/℃ and Pearson square correlation coefficient is 0.999 3. Theoretically, the temperature sensitivity can reach 0.000 1 ℃. The results show that the method of demodulation of dynamic signals can achieve high sensitivity detection by applying it to the demodulation of quasi-static signals such as temperature, which has a good application potential in the application of ocean temperature monitoring.