船载拖曳式光纤温度剖面测量系统研究

Research on shipborne towed fiber temperature profile measurement system

针对海洋温度剖面高时空分辨率、实时连续测量的要求,提出了船载拖曳与全光纤温度链相结合的新型测量系统。通过对光纤光栅的特殊封装和标定测试,FBG温度传感器的灵敏度和响应时间分别达到28.5 pm/℃和214.8 ms,满足浅表层海域的测试要求。设计并制备200 m长的温度拖曳阵,配合甲板单元的解调设备和绞车系统,于黄海部分海域完成水深70 m的拖曳试验。分析温度剖面测试结果,温度传感器与SBE56(标准传感器,美国海鸟生产)具有高度一致性,同时测量精度优于0.1℃,具有较高的实用价值。

Aiming at the requirement of high temporal-spatial resolution and real time continuous measurement of oceantemperature profile, a new measurement system of shipborne towed and all fiber temperature chain is presented.The sensitivity and response time of FBG temperature sensor reach 28. 5 pm/℃ and 214. 8 ms respectivelythrough special encapsulation and calibration tests of fiber Bragg grating, which meet the test requirements of shallowsurface at sea area 200 m temperature towed array was designed and prepared, and the experiments were performedwith demodulation equipment and winch system of deck units in parts of yellow sea whose depth is 70 m. The test resultsof temperature profile show that the temperature sensors are highly consistent with the SBE56 （ standard sensorsproduced by the United States Seabirds） and the measurement accuracy is better than 0. 1 ℃. This measurement systemhas high practical value.