自返式微型地热探针温度测量电路设计与实现  

Design and Realization of Temperature Measurement Circuit of Miniature Boomerang Seafloor Sediment Heat-Flow Probe

作　　者：冯志涛[1] 李家军[1] 李墨[1] 贾立双[1] 关宏韬[1] 

机构地区：[1]国家海洋技术中心,天津300112

出　　处：《海洋技术学报》2017年第6期44-48,共5页Journal of Ocean Technology

基　　金：国家自然科学基金资助项目(41306093);国家海洋局海底科学重点实验室开发基金资助项目(KLSG1701)

摘　　要：自返式微型地热探针体型小巧,便于机载或舰载投弃式布放,可自动贯入海底沉积物进行热流测量。采用无缆布放方式,避免了缆绳牵引造成的海底沉积物结构性破坏,从而真正实现了无扰动的海底热流测量。海底沉积物的温度在恒温层以下随深度增加其变化非常微弱,而测温电路是地热探针的核心部分,其测温精度直接关系到热流数据的质量。针对自返式微型地热探针的工作特点,为提高探针温度及温度梯度测量的精度,在深入研究测温原理的基础之上,完成了测温电路的硬件电路和控制软件的设计,并通过合理的内部温度补偿算法设计,进一步提高了测量精度。测温电路在海上试验过程中,其测温曲线平滑,一致性良好,无畸变,实现了海底沉积物热流的精确测量。Auto-return miniature geothermal probe is compact and easy to airborne or ship throw disposable layout. It can automatically penetrate into the sediments of the sea for heat flow measurement. Without cable, it has avoided the structural damage of the seabed sediment caused by the cable traction, thus has realized undulating seafloor heat flow measurement truly. The temperature of seafloor sediment changes little with the increase of depth below the thermostat, and the temperature measuring circuit is the core part of geothermal probe. The accuracy of temperature measurement is directly related to the quality of heat flow data. In order to improve the accuracy of the probe temperature and temperature gradient measurement, aiming at the working characteristic of the auto-return micro-geothermal probe, the hardware circuit and the control software design of the temperature measurement circuit are completed based on the deep study of the temperature measurement principle. And through a reasonable internal temperature compensation algorithm design, it is possible to further improve the measurement accuracy. Temperature measurement circuit in the sea test process, the temperature curve is smooth, good consistency, no distortion, achieved a precise measurement of seafloor sediment heat flow.

关 键 词：自返式微型地热探针 海底热流 高精度温度测量 四线制 温度补偿算法 

分 类 号：P716[天文地球—海洋科学]