一种适合海洋环境温度测量的新方法   总被引：2，自引：0，他引：2  

井彦明  王景青  申秀花  刘连君 《海洋技术学报》2008,27(2):18-24

介绍了一种崭新的海洋环境温度测量方法,也可以说是一种崭新的温度测量传感器。它直接输出温度数字量,连接PC机极为方便。文中介绍了该方法的测量原理和特点;介绍了室内和海上的试验情况,给出了试验数据和曲线;展望了广阔的应用前景。  相似文献   

用于太阳紫外辐射测量传感器的设计   总被引：1，自引：0，他引：1  

王晶  王项南  石建军  李超 《海洋技术学报》2008,27(4)

介绍了太阳紫外辐射的测量原理,为了提高入射光学系统的余弦响应特性而设计的余弦漫射器,以及等效辐射平面位置的计算方法。设计了适用于海滨浴场等场所的太阳紫外线辐射传感器的光学系统结构,研制了试验样机,开展了相应的试验,并对试验结果进行了分析。  相似文献   

Partially standing wave measurement in the presence of steady current by use of coincident velocity and/or pressure data     

Déborah Drevard  Vincent ReyPhilippe Fraunié 《Coastal Engineering》2009

In recent years, instrumentation for field flow measurements has become more and more sophisticated. In particular, local pressure and velocity are measured at frequency rates up to at least 2 Hz, which gives information on wave energy. The present work describes the methods for partially standing wave measurement in the presence of current by use of coincident measurements of both horizontal velocity and pressure, or vertical velocity. Reflection calculated from either coincident horizontal and vertical velocities or three-gauge methods are compared. They are based on existing experiments carried out in an ocean wave basin for both regular and irregular waves in the presence of current. Applications to field measurements, out of and in the breaking zones are then presented. In the nearshore, coincident horizontal and vertical velocities far from the bottom, and coincident horizontal velocity and pressure close to the bottom give relevant information concerning partially standing waves.  相似文献   

Development of in-situ Marine Sediment Geo-Acoustic Measurement System with Real-Time and Multi Frequencies （the Second Generation）   总被引：1，自引：0，他引：1  

陶春辉  邓显明  李红星  周建平  金肖兵  傅顺声  Wilkens  R.  H  顾春华  何拥华 《中国海洋工程》2009,23(4):769-778

  相似文献   

Short-term temperature and salinity variations in the Tsushima Strait in 2004: Behavior of the surface low-salinity water in the strait     

Kosuke Mori  Takeshi Matsuno  Tomoharu Senjyu  Naoki Hirose  In-Seong Han 《Journal of Oceanography》2009,65(3):301-310

Temporal variations in temperature and salinity observed in 2004 were investigated on a short time scale in the Tsushima Strait. The data were obtained by long-term in situ measurements at Mitsushima and Futaoi Island using an instrument equipped with a piston-type wiper to avoid biofouling. In addition, the temperature and salinity values of the surface layer obtained by a commercial ferryboat between Hakata and Busan were used to investigate their spatiotemporal variations. Temperature and salinity variations with a time scale of several days had a negative correlation in the summer. This evidence suggests that a warm and less saline water mass, which is considered to be mainly the Changjiang Diluted Water (CDW), flowed intermittently through the Tsushima Strait in summer. In late July 2004, a large low-salinity water mass was detected in the Tsushima Strait. At that time, the freshwater transport through the Tsushima Strait transiently reached about 12 × 10⁴ m³s⁻¹, which is estimated from observed acoustic Doppler current profiler (ADCP) data along a ferryboat line and inferred salinity profiles. This estimated value is more than double the maximum of the climatological monthly mean of the Changjiang discharge. Furthermore, salinity and surface current data obtained by high frequency ocean radar (HF radar) indicate that water properties at Mitsushima may occasionally represent part of the water flowing through the western channel via a countercurrent, although Mitsushima is geographically located in the eastern channel.  相似文献   

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陈志遥  李树德 《大地测量与地球动力学》2008,28(3):112-117

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A Moored Underwater Energy Conservation System for Profiling Measurement   总被引：3，自引：0，他引：3  

龚德俊陈永华  李思忍徐永平 姜静波 《中国海洋工程》2007,21(3):541-548

There is a need to obtain the hydrologic data including ocean current,wave,temperature and so on in the South China Sea.A new profiling instrument which does not suffer from the damage due to nature forces or incidents caused by passing ships,is under development to acquire data from this area.This device is based on a taut single point mid-water mooring system.It incorporates a small,instrumented vertically profiling float attached via an electromechanical cable to a winch integral with the main subsurface flotation.On a pre-set schedule,the instrument float with sensors is winched up to the surface if there is no ship passing by,which is defined by an on-board miniature sonar.And it can be immediately winched down to a certain depth if the sonar sensor finds something is coming.Since,because of logistics,the area can only be visited once for a long time and a minimum of 10 times per day profiles are desired,energy demands are severe.To respond to these concerns,the system has been designed to conserve a substantial portion of the potential energy lost during the ascent phase of each profile and subsequently use this energy to pull the instrument down.Compared with the previous single-point layered measuring mode,it is advanced and economica1.At last the paper introduces the test in the South China Sea.  相似文献   

印尼海啸区附近海域沉积物声速测量及声学特性分析   总被引：1，自引：2，他引：1  

周建平  陶春辉  顾春华  何拥华  张金辉 《海洋学报》2008,30(3):56-61

介绍了沉积物柱状样超声透射法测量方法和原理.对印尼海啸区附近海域沉积物柱状样进行了现场测量,通过测量数据的处理和分析,给出了沉积物的垂向声速剖面.讨论了声速与频率的关系,指出声速具有随频率的0.1次方增大的频散特性.分析沉积深度、结构以及生物扰动等方面的因素对声学测量结果的影响,结果表明海底地震引起的沉积物变迁、沉积物结构扰动、气体的混入等对声速的测量结果均产生影响.  相似文献   

深海系泊法向承力锚模型实验系统     

盛志刚  刘海笑 《海洋技术学报》2009,28(1)

法向承力锚是一种新型的拖曳嵌入式系泊基础.这种锚的工程应用仅有10 a时间.国内在此项技术上尚属空白.通过实验系统的设计,介绍了针对这种新型拖曳锚展开模型实验研究的实验平台.利用一些新型传感器和巧妙的机件设计,不仅实现了实验量测方法的创新,而且达到了经济实用的目的.实验结果也验证了整个系统设计的可靠性.  相似文献   

冲绳海槽浮岩包裹体的测温试验   总被引：3，自引：2，他引：3  

翟世奎  张杰  张明书  于增慧 《海洋与湖沼》2001,32(1):67-73

对浮岩中斜长石斑晶中的包裹体及玻璃基质中的包裹体首先进行双面光薄片的镜下观察，然后进行了系统的均化法与爆裂法测温试验。观察与试验结果表明：(1)斜长石中的包裹体均为玻璃质+气泡的两相包裹体，未发现气—液包裹体。固化包裹体为玻璃质，非晶质的固化包裹体外即是大量的气泡，特别是基质当中气泡更为发育，说明熔浆中含有丰富的挥发性组分，同时也说明包裹体形成于较浅的地质条件下。(2)长石中包裹体的均化温度不受包裹体特征不同的影响，均化温度分布范围从910—1250℃，峰值明显，计算的均化温度为Tz=(1081.4±177.9)℃，但还存在有高于1250℃的均化温度峰。包裹体均化法测试结果说明浮岩中斜长石的形成过程至少有两个阶段：第一阶段的岩浆温度在1200—1300℃左右，在此温度下形成的是An值较高的基性斜长石，同时结晶的还有辉石等矿物，斜长石结晶第二个阶段时的熔浆温度在1100℃以下，这一阶段持续的时间长，跨越的温度范围大，应是岩浆在近地表和岩浆喷出过程中的岩浆快速冷却期，同时伴随有矿物大规模晶出。(3)包裹体中的气相部分均聚合成圆形或近圆形，说明温度下降速度较快。斑晶斜长石中部分包裹体与基质玻璃中包裹体的形成温度是连续变化的，这一事实应该与冲绳海槽特殊的地质条件有关  相似文献