海底热流长期观测系统中低功耗测温单元的设计与实现  

Design and Implementation of the Low-Power Temperature Measuring Circuit for Long-term Heat Flow Observation

作　　者：曾信[1] 杨小秋[1] 杨军 于传海[1,3] 施小斌[1] 丘学林[1] 

机构地区：[1]中国科学院南海海洋研究所中国科学院边缘海地质重点实验室,广东广州510301 [2]上海海洋石油局第一海洋地质调查大队,上海201208 [3]中国科学院大学,北京100049

出　　处：《海洋技术学报》2016年第2期1-8,共8页Journal of Ocean Technology

基　　金：国家自然科学基金资助项目(41474065;41106086);中国科学院科研装备研制项目资助(YZ201136);中国科学院战略性先导科技专项子课题资助项目(XDA11040303);国家海洋局海底科学重点实验开放基金资助项目(KLSG1502)

摘　　要：为满足在底水温度波动较大的海域进行海底热流原位长期观测的需求,研制了一种低功耗温度长期采集电路,并与钛合金耐压外壳集成为微型自容式测温单元,在室内和海上进行了一系列测试。室内测试结果表明:当测温电路进行连续采集时,其平均动态电流为2.1 m A;当电路不进行采集工作保持低功耗状态时,整个测温电路的电流消耗达到最低值,实测为4μA,达到预期设计指标。通过将微型测温单元捆绑在海底地震仪上,在南海西沙和东沙海域成功进行了6个站位的海底原位底水温度长期观测测试,获取了最长约17 d的底水温度波动数据,验证了测量电路的稳定性和实用性。To meet the needs of in-situ long-term observation on seafloor heat flow in sea areas with obvious water temperature variation, a kind of low-power and long-term temperature measuring circuit is designed and then integrated with titanium alloy pressure-resistance shell to form a micro self-contained temperature measuring probe, which has undergone a series of laboratory and sea tests. The results from laboratory tests show that when the circuit conducts continuous acquisition, the average dynamic current is 2.1 mA; and when the circuit stops working and keeps in low power consumption state, the whole circuit only expends 4 p.A current, reaching expected design requirements. Meanwhile, in-situ long-term observation on water temperature is successfully carried out for 6 sites in the Xisha and Dongsha Areas in the South China Sea by bundling the temperature measuring probe to the seafloor seismometer. The variation data of water temperature are obtained with the longest period of 17 d, so as to validate the stability and practicability of the low-power temperature measuring circuit.

关 键 词：海底热流 长期观测 低功耗 测温电路 

分 类 号：P716[天文地球—海洋科学]