Investigation on the Oscillating Buoy Wave Power Device   总被引：4，自引：0，他引：4  

SU  Yongling 《中国海洋工程》2002,16(1):141-149

An oscillating buoy wave power device (OD) is a device extracting wave power by an oscillating buoy. Being excited by waves, the buoy heaves up and down to convert wave energy into electricity by means of a mechanical or hydraulic device. Compared with an Oscillating Water Column (OWC) wave power device, the OD has the same capture vvidth ratio as the OWC does, but much higher secondary conversion efficiency. Moreover, the chamber of the OWC, which is the most expensive and difficult part to be built, is not necessary for the OD, so it is easier to construct an OD. In this paper, a nu-merical calculation is conducted for an optimal design of the OD firstly, then a model of the device is built and, a model test is carried out in a wave tank. The results show that the total efficiency of the OD is much higher than that of the OWC and that the OD is a promising wave power device.  相似文献   

珠江口藻华水体总吸收系数的变化特性及高光谱反演模式   总被引：3，自引：1，他引：2       下载免费PDF全文

王桂芬  曹文熙  杨跃忠  周雯  梁少君 《热带海洋学报》2010,29(2):52-58

基于2007年8月海洋光学浮标在珠江口投放期间获得的近16天的实测生物光学数据, 对一次藻华过程中水体总吸收系数和水色光谱的变化特性及其相互关系进行了研究。结果表明, 藻华前后水体中非藻类物质尤其是有色溶解有机物在蓝光波段具有较强的吸收贡献, 而当藻华爆发时, 随着叶绿素a浓度的急剧增大, 浮游植物的吸收贡献明显增强; 各波段之间总吸收系数呈现出较好的线性相关关系, 吸收光谱蓝绿波段比值的变化对遥感反射率的光谱分布有重要的贡献; 据此建立了对水体总吸收系数反演的经验关系模型, 表现出较高的反演精度, 计算值与实测值之间相对偏差的均方根在可见光波段可控制在24%以内。  相似文献   

国产深海准实时传输潜标系统设计   总被引：2，自引：2，他引：0  

于非  陈永华  周春  张孝薇  邓锴  韩云峰  刘岩松  刘庆奎  王蓓  胡贺岗  姜静波  倪佐涛  姜斌  李晓龙 《海洋科学》2020,44(7):194-200

基于海洋环境安全保障、海洋环境预报和海洋科学研究的需要，开展国产深海准实时传输潜标系统的设计，重点进行锚泊系统水动力分析、观测设备工作同步性、准实时通讯系统安全可靠和系统低功耗等整体技术设计；开展轻型感应耦合传输缆制作、大深度感应耦合传输和智能收放通讯等数据实时通讯技术的研究；进行适用于准实时传输潜标系统的多种类国产设备的稳定性和可靠性优化、规模化集成和系统化的应用示范，形成半潜升降式准实时通讯潜标与浮子式准实时通讯潜标各1套。所设计的准实时传输潜标系统集成了1台抗污染CTD、19台感应耦合CTD、8台感应耦合T、4台感应耦合传输的ADCP、2台单点海流计和6台感应耦合数据传输仪，并配有2套声学释放器；潜标系统本体设计含有3个水下流线型浮体、1套通讯浮子、1套准实时卫星通讯装置（半潜式水下绞车或海面浮子）和1套锚泊缆系，可实现深达2 000 mm的剖面温盐深和海流等海洋要素的高频率、多要素、多层次的长期连续观测和数据准实时传输，以便对科学问题解决和海洋环境安全保障等提供及时的数据支撑。  相似文献   

国产海洋气象漂流观测仪在台风观测中的应用分析     

曹晓钟  李肖霞  雷勇  温华洋  王榭 《气象》2019,45(10):1457-1463

介绍了由我国自主研制的、基于北斗导航通信卫星的、集海洋水文要素和气象要素一体观测的、在恶劣海况条件下能进行连续、可靠观测的海洋气象漂流观测仪,及其在多个海域开展实际的外海观测试验情况。2017年8月20日至9月5日,三台漂流观测仪在广东博贺海洋气象综合试验基地,经历了2017年第13号台风天鸽和第14号台风帕卡两次台风天气过程。对试验期间获取的台风天气过程中气温、气压、海温等观测数据的分析表明,漂流观测仪所获得的观测数据与相关国家级业务观测站点的观测数据具有较好的相关性,揭示了台风天气过程的明显特征,并表现出合理、清晰的日变化特征。上述试验表明,国产海洋气象漂流观测仪已具备在恶劣海况下进行实际观测的能力。  相似文献   

Validation of SWH and SSHA from SARAL/AltiKa Using Jason-2 and In-Situ Observations     

Suchandra Aich Bhowmick  Rashmi Sharma  K. N. Babu  A. K. Shukla  Raj Kumar  R. Venkatesan 《Marine Geodesy》2015,38(3):193-205

The focus of this study is the validation of significant wave height (SWH) and sea surface height anomaly (SSHA) obtained from the first Ka-band altimeter AltiKa onboard SARAL (Satellite for ARGOS and Altimeters). It is a collaborative mission of the Indian Space Research Organization and Centre National d'Etudes Spatiales (CNES). This is done using in-situ observations from buoy and Jason-2 measurements. Validation using buoy observations are at particular locations while that using Jason-2 altimeter is an attempt towards global validation of Altika products. The results clearly indicate that the SARAL/AltiKa provide high-quality data and the errors are within a predefined range of accuracy. A parallel validation of SWH from other altimeters, which monitored ocean since last decade, like EnviSAT and Jason-2 was also performed with buoy observations. The results clearly show that the accuracy of AltiKa SWH is much better than EnviSAT and comparable to reference mission Jason-2. The accuracy is quite good for the calm sea while in the rough seas the accuracy degrades some. The inter-comparison of SARAL/AltiKa SSHA with Jason-2 indicates a fair match between them. These validation exercises demonstrate the high quality of AltiKa products, usable for practical applications.  相似文献   

基于Argo浮标数据的星载微波辐射计Aquarius数据产品质量评估   总被引：3，自引：1，他引：2  

王进  张杰  王晶 《海洋学报》2015,37(3):46-53

Aquarius是专门用于海洋盐度监测的L波段辐射计,于2011年6月发射入轨,目前已进入业务化运行阶段。本文以太平洋为研究区域,利用Argo盐度现场数据对星载微波辐射计Aquarius的2012年2级数据产品质量进行了分析与讨论,结果表明:与Argo数据比较,Aquarius数据盐度存在0.1的负偏差,标准差约为0.7,升轨和降轨数据差异不明显;受亮温陆地污染和无线电射频干扰的影响,近岸海域反演误差较大;海面温度较高的低纬海域反演结果优于中纬度海域;受亮温敏感性及粗糙海面发射率模型的影响,Aquarius在低温水域以及高风速条件下盐度反演误差较大,标准差可达1以上。  相似文献   

浙江省海洋水质监测浮标设计与实现     

赵聪蛟  何志强  周燕 《海洋技术学报》2015,34(5):37-42

作为一种高技术监测手段,海洋浮标可实现现场自动监测而不受恶劣海况的影响,近年来得到了广泛的重视和快速发展。文中介绍了浙江近岸海域海洋水质监测浮标的结构设计和自动监测实现。浮标设计为生态浮标、海滨浮标和专项浮标3种类型,由浮体、标架、供电设备、防护设备、锚系、传感器、数据采集传输、电子/电池舱、岸站接收系统等9个部分组成。浮体设计为圆饼形,浮体下方正中安装稳定锤以保证具备足够的稳定性。供电设备由太阳能电池板、大容量蓄电池组成,可保障海上30 d连续阴雨天气、恶劣海况下的不间断供电。浮标经喷防污漆、牺牲阳极保护、裹铜皮、加过滤网和人工清除等5种方法防腐、防污处理后投放入海,采用常规维护、应急维护和年度维护等3种方式保障浮标系统运行稳定。投放后可实现对标浮所在海域水质、气象、生态等参数的连续、实时、自动监测。最后对浮体直径设计和浮标投放点选址提出了建议和要求。该设计可为其它类似区域的水质监控提供良好的参考。  相似文献   

象山港海洋监测浮标在强台风“海葵”影响期间的可靠性分析          下载免费PDF全文

赵聪蛟  冯辉强  祝翔宇  周燕 《热带海洋学报》2015,34(2):8-14

  相似文献   

Variations of sea ice temperature from CHINARE 2003 and its application on sea ice model evaluation          下载免费PDF全文

ZHANG Zhanhai  LIU Jiping 《大气和海洋科学快报》2009,2(1):57-61

Variation of vertical profiles of sea ice temperature and adjacent atmosphere and ocean temperatures were measured by ice drifting buoys deployed in the northeast Chukchi Sea as part of the 2003 Chinese Arctic Research Expedition.The buoy observations (September 2003 to February 2005) show that the cooling of the ice began in late September,propagated down through the ice,reaching the bottom of the ice in December,and continued throughout the winter.In winter 2003/04,some obvious warmings were observed in the upper portion of the ice in response to major warmings in the overlying atmosphere associated with the periodicity of storms in the northeast Chukchi Sea.It is found that the melt season at the buoy site in 2004 was about 15% longer than normal.The buoy observed vertical ice temperature profiles were used as a diagnostic for sea ice model evaluation.The results show that the simulated ice temperature profiles have large discrepancies as compared with the observations.  相似文献   

Nearshore directional wave measurements by surface-following buoy and acoustic Doppler current profiler   总被引：1，自引：0，他引：1  

Paul A. Work   《Ocean Engineering》2008,35(8-9):727-737

Directional energy spectra of nearshore surface waves were measured for a 3-year period (2004–2007) at a site with mean depth 14 m and mean tidal range 2.1 m. Triaxys surface-following wave buoys reported hourly directional wave energy spectra and wave parameters near the offshore end of the Savannah River Entrance Channel, Georgia, USA. An acoustic Doppler current profiler (ADCP) was located beside the wave buoy for 3 months. Directional and non-directional surface wave energy spectra and the corresponding bulk wave parameters (height, period, and direction) are compared for the two systems. Most parameters derived from the spectra agree closely; the most significant differences were found at the upper and lower frequency measurement limits, where signal-to-noise ratios were lower. The wave buoy consistently reports a small amount of energy below 0.05 Hz that does not appear in the ADCP-derived spectra and does not appear to be related to the mooring system. This leads to larger mean and peak periods reported by the buoy. All directional spectra were computed using the Maximum Entropy Method for both instruments, but the buoy, with spectra derived from six independent time series, provides lower directional resolving power than the ADCP, which utilizes twelve time series. Both systems gave similar results defining mean and peak wave directions, with the primary difference being that the ADCP indicates energy to be more tightly concentrated around the peak direction.  相似文献