Manned underwater robot is an important platform to carry various sensors and working tools to finish the in situ measurement and sampling in the deep sea. Due to its limited loading capacity, the device it will be carried, usually, requires to be able to dive to its working depth with a small volume and weight. According to the application requirements of deep-sea sediment temperature gradient in situ measurement observed, a detector system that can obtain data in situ is designed, which mainly includes a titanium alloy electronic cabin and a temperature probe. A comprehensive design analysis method is used to compare and analyze the ultimate static pressure, stability limit load, bending moment load, and transient temperature field on the underwater operation conditions. Optimal dimensions and filled media in the probe are decided. Finally, the pressure resistance test is finished in the lab, and scientific application is conducted on Jiaolong’s 127th dive in the Northwest Indian Ocean, which successfully sampling the temperature gradient data of deep-sea sediments in the Daxi hydrothermal area. The method introduced in this article can effectively improve the safety and reliability of deep-sea structure and greatly reduce costs throughout the design cycle.

中文翻译：

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载人水下机器人温度梯度检测器的研制与应用

载人水下机器人是携带各种传感器和作业工具完成深海原位测量和采样的重要平台。由于其承载能力有限，通常需要携带的设备能够以较小的体积和重量下潜到其工作深度。根据深海沉积物温度梯度原位测量应用需求，设计了一种可原位获取数据的探测器系统，主要包括钛合金电子舱和温度探头。采用综合设计分析方法，对水下工况下的极限静压力、稳定极限载荷、弯矩载荷、瞬态温度场进行对比分析。确定探头中的最佳尺寸和填充介质。最后，实验室完成耐压试验，并在蛟龙第127次西北印度洋下潜进行科学应用，成功采集大溪热液区深海沉积物温度梯度数据。本文介绍的方法可以有效提高深海结构的安全性和可靠性，并大大降低整个设计周期的成本。