直读拖曳式光纤光栅温度剖面测量系统

针对我国对海水温度剖面的测量需求,在分析已有方法优缺点的基础上提出了一种新的方法——光纤温度剖面连续测量系统.此测量系统以光纤光栅传感器为测量单元,采用波分复用的方式串接在一起组成船载拖曳链,再通过甲板上的解调终端实时显示所测物理参量,从而实现分布式实时测量.这种方法能够以低成本快速高效获得高分辨率的海水温度剖面分布情况,为海洋探测提供丰富有效的数据.课题组设计制作了拖曳链系统的甲板机及60 m长的拖曳链,并在青岛近海进行了拖曳海试,实时获取了试验数据,达到了预期效果.

Direct-Reading Temperature Profile Measuring System with Towed Fiber Bragg Grating Sensor

In order to meet China''s demand for seawater temperature profile measurement, this paper proposes a new approach: the continuous measurement system of temperature profile based on fiber bragg grating sensor after analyzing the advantages and disadvantages of existing methods. In this measurement system, the fiber grating sensors serve as measurement units, which are connected into the shipborne dragging chain by the method of wavelength division multiplexing. Then the measured physical parameters can be displayed in a real-time way through the demodulation terminal on the deck, thus realizing distributed real-time measurement. With this method, the authors can obtain high-resolution seawater temperature profile with higher efficiency and lower costs, providing abundant and effective data for ocean survey. The research team designed and fabricated the deck machinery and a 60-m long dragging chain of the drag chain system, and carried out testing experiments in Qingdao offshore area for obtaining real-time experimental data, which has proved the expected outcomes.