声学法深海热液温度场测量及重建算法研究

Acoustic temperature field measurement in deep-sea hydrothermal vents and reconstruction algorithm

介绍了利用声学方法测量深海热液温度场的基本原理。对单峰温度场模型和双峰温度场模型,采用最小二乘法进行重建仿真,给出了重建温度场的三维图和等温线图,计算了重建温度场的绝对误差、相对误差和均方根误差。比较了增加声学测量路径后单峰温度场模型的重建结果。仿真结果表明:最小二乘法具有较高的重建精度,增加声学测量路径能有效地提高温度场重建精度。湖试实验结果表明,最小二乘法可基本还原单峰温度场。

The basic principle of acoustic temperature field measurement in deep-sea hydrothermal vents is introduced. Based on single and double-peaked temperature field models, the reconstruction of the temperature fields using least square method is presented. The absolute error, relative error and root mean square error of the reconstructed temperature fields are given. Simulation result shows that least square method has good reconstruction accuracy in temperature field reconstruction. Furthermore, increasing acoustic measurement paths could improve the reconstruction accuracy effectively. Lake experiment result shows that least square method could reconstruct single-peaked temperature field in a hydrothermal vent.