中国会展最新文献_第5页

ULTRAMOOR: a 5-year current meter mooring ULTRAMOOR:一个5年的海流计系泊

中国会展 Pub Date : 2000-09-11 DOI: 10.1109/OCEANS.2000.881749

D. Frye, D. Peters, N. Hogg, C. Wunsch

引用次数: 6

"EZ-Gram" sonar display tools: applying interactive data visualization and analysis to undersea environments “EZ-Gram”声呐显示工具:在海底环境中应用交互式数据可视化和分析

中国会展 Pub Date : 2000-09-11 DOI: 10.1109/OCEANS.2000.881374

R. J. Barton, R. J. Rowland, L.M. Encamacao

引用次数: 7

Robotic ocean vehicles for marine science applications: the European ASIMOV project 用于海洋科学应用的海洋机器人:欧洲ASIMOV项目

中国会展 Pub Date : 2000-09-11 DOI: 10.1109/OCEANS.2000.881293

A. Pascoal, P. Oliveira, C. Silvestre, L. Sebastião, Manuel Rufino, V. Barroso, J. Gomes, G. Ayela, P. Coince, M. Cardew, A. Ryan, H. Braithwaite, N. Cardew, J. Trepte, N. Seube, J. Champeau, P. Dhaussy, V. Sauce, R. Moitié, R. S. Santos, F. Cardigos, M. Brussieux, P. Dando

引用次数: 160

Adaptive calibration of an autonomous underwater vehicle navigation system 自主水下航行器导航系统的自适应标定

中国会展 Pub Date : 2000-09-11 DOI: 10.1109/OCEANS.2000.881777

C.M. De Angelis, J. Whitney

{"title":"Adaptive calibration of an autonomous underwater vehicle navigation system","authors":"C.M. De Angelis, J. Whitney","doi":"10.1109/OCEANS.2000.881777","DOIUrl":"https://doi.org/10.1109/OCEANS.2000.881777","url":null,"abstract":"There continues to exist the problem of long-term accurate position estimation for autonomous underwater vehicles (AUVs). In current operations, the AUVs positional fix is initially obtained on the surface from a global positioning system (GPS) receiver. The AUV then submerges to perform the desired mission. While submerged, location/navigation is performed using, at a minimum, an inertial navigation system (INS). Depending on the sophistication of the AUV, Doppler velocity sonar (DVS) might be combined with a multi-state Kalman filter (KF) to perform position estimation. The estimates from the INS and the DVS/Kalman filter estimator are combined to provide a robust estimate of location. Because the KF is model based, there is a likelihood that over time the divergence of the KF may increase since the true motion of the AUV does not match the modeled motion. At that point the AUV must surface to obtain another set of absolute position coordinates from the GPS before being able to continue its mission. Depending on the duration of the mission, this process may need to be repeated several times, which unnecessarily uses battery/power resources. By combining a database which contains sonargrammetric, terrain matching, and image registration information, with the standard navigation instrument suite, the accuracy of positional estimates could be maintained over a longer duration. This would allow the AUV to remain submerged for longer periods of time, thus minimizing the drain on the limited power resources.","PeriodicalId":68534,"journal":{"name":"中国会展","volume":"21 1","pages":"1273-1275 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2000-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82591538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Acoustic modem unit 声学调制解调器

中国会展 Pub Date : 2000-09-11 DOI: 10.1109/OCEANS.2000.881350

E. Hobart, G. Allsup, D. Hosom, T. Baldasarre

{"title":"Acoustic modem unit","authors":"E. Hobart, G. Allsup, D. Hosom, T. Baldasarre","doi":"10.1109/OCEANS.2000.881350","DOIUrl":"https://doi.org/10.1109/OCEANS.2000.881350","url":null,"abstract":"This paper will describe a device for transmitting data using a ships hull or frame as the acoustic path. This device is called a \"HullCom\" Acoustic Modem Unit (AMU). The initial purpose for the development was wireless data transmission on Volunteer Observing Ships (VOS). VOS offer a very attractive platform for meteorological and oceanographic measurements over much of the global oceans. Many VOS are fast container ships whose operators seek minimal time in port. There is not enough time to install cables and in addition, these ships are sold frequently in order to match the ship capability to contracted loads (thereby making cables unusable). In addition, installing cables on ships can be more expensive than the cost of the custom electronics described in this paper. The device consists of two sets of equipment, a local AMU (AMU-L) in an accessible place such as the main deck and a remote AMU (AMU-R) in a non-accessible place such as a sea surface temperature instrument mounted inside the hull near the waterline. Each AMU consists of an acoustic transducer, acoustic transmit and receive electronics, battery power and a controller. The acoustic portions of the AMU were designed and fabricated by Harris Acoustic Products and the controller was designed at the Woods Hole Oceanographic Institution. The acoustic portions of the AMU are based on early work by SeaBeam Instruments Inc on a \"Hull Phone\". The \"Hull Phone\" uses a voice modulated carrier frequency to provide communications in ships that do not have working standard communications due to damage or other circumstance. The translation from voice to a digital frequency shift key data signal is straight forward. Establishing an acoustic protocol that can tolerate the many reflections and noise interference was not straight forward. The final result is a 20 baud modem.","PeriodicalId":68534,"journal":{"name":"中国会展","volume":"1 1","pages":"769-772 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2000-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83084536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

The McLane moored profiler: an autonomous platform for oceanographic measurements 麦克莱恩系泊剖面仪:一个自主的海洋测量平台

中国会展 Pub Date : 2000-09-11 DOI: 10.1109/OCEANS.2000.881284

A. Morrison, J. D. Billings, K. Doherty

引用次数: 22

Evaluation of wave measurements with an acoustic Doppler current profiler 用声学多普勒电流剖面仪评价波浪测量值

中国会展 Pub Date : 2000-09-11 DOI: 10.1109/OCEANS.2000.881761

K. Rorbäk, H. Andersen

{"title":"Evaluation of wave measurements with an acoustic Doppler current profiler","authors":"K. Rorbäk, H. Andersen","doi":"10.1109/OCEANS.2000.881761","DOIUrl":"https://doi.org/10.1109/OCEANS.2000.881761","url":null,"abstract":"Routine monitoring of waves and currents in the nearshore region is of great interest both scientifically and to the general public because of its role in coastline erosion and its impact on recreational activities. Historically, the technology for measuring these quantities has required separate instrumentation for each, but within the last year or two, it has been shown that it is possible in shallow water to estimate both the wave height, wave direction, and current from a conventional bottom mounted, upward-looking acoustic Doppler current profiler (ADCP). Software for converting wave orbital velocity measurements from ADCPs into wave frequency and directional spectra is now becoming commercially available. The authors have taken the opportunity to evaluate the WAVES software from RD Instruments, USA, by establishing an intercomparison between wave measurements obtained with a permanently deployed 1200 kHz ADCP, an electromagnetic current meter/pressure sensor and a heave/pitch/roll buoy. They have compared the wave surface elevation and frequency-direction spectra derived from the different measurement/analyze principles and we have analyzed the inherent software limitations due to the measurement principles.","PeriodicalId":68534,"journal":{"name":"中国会展","volume":"46 1","pages":"1181-1187 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2000-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82498334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Building and sustaining marine technology partnerships 建立和维持海洋技术伙伴关系

中国会展 Pub Date : 2000-09-11 DOI: 10.1109/OCEANS.2000.881333

C. R. Nichols

{"title":"Building and sustaining marine technology partnerships","authors":"C. R. Nichols","doi":"10.1109/OCEANS.2000.881333","DOIUrl":"https://doi.org/10.1109/OCEANS.2000.881333","url":null,"abstract":"This paper defines a marine technology partnership and presents the fundamental mechanics for sustaining a viable partnership. Partnerships follow a natural life cycle and should be formally structured to share costs and be inclusive, i.e., promoting broad participation. By understanding partnership principles and studying currently operating partnerships, one can become equipped to use a partnership strategy to meet marine technology challenges. Inventive planning and formal accountability provide the key mechanisms for broadening the partnership and adapting it to changing societal needs. Critical steps that sustain a viable partnership include operational principles that extend from initiating a partnership agreement to conducting meaningful evaluation. Marine technology partnerships should enable participants to integrate multidisciplinary resources to support key oceanographic, meteorological, engineering, and marine operations. Several federal initiatives such as the Small Business Technology Transfer program and the National Ocean Partnership Program now exist to facilitate collaborative research. These programs have contributed to the development of productive business-industry-academic partnerships.","PeriodicalId":68534,"journal":{"name":"中国会展","volume":"7 1","pages":"699-703 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2000-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82537891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two dimensional thermal imaging arrays-a low visibility navigation aid 二维热成像阵列——一种低能见度导航辅助设备

中国会展 Pub Date : 2000-09-11 DOI: 10.1109/OCEANS.2000.882161

A. Amin

引用次数: 0

Wireline quality underwater wireless communication using high speed acoustic modems 使用高速声学调制解调器的有线质量水下无线通信

中国会展 Pub Date : 2000-09-11 DOI: 10.1109/OCEANS.2000.881294

Xiaolong Yu

引用次数: 31