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Tang Rongqing Wang Daoyan Zhang Xixian Egnineer Shanghai Jiao Tong University Shanghai Associate Professor Shanghai Jiao University Shanghai 《中国海洋工程》1993,(3)
- The authors have used a low-cost ROV of observation type for underice surveying of the Nen-Jiang Cross-river oil pipe line in the Da Qing oil field. The operation method, process and the safety measures for severe cold areas are presented. The fruitful tries and experience may be useful to ROV operators in severe cold areas. 相似文献
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自动剖面浮标研究现状及展望 总被引:1,自引:0,他引:1
回顾了自动剖面浮标的发展历程,自动剖面浮标由Swollow提出的中性浮子发展而来,演变到现在的PROVOR型、APEX型、SOLO型等自动剖面浮标。文中介绍了Argo计划中几种主要的自动剖面浮标,其浮力调节原理主要是通过改变浮标在水中的排水体积实现自动沉浮,从而测量水的温度、盐度、深度等数据。对常规(2 000 m)和深海(2 000 m)自动剖面浮标进行比较,大部分深海自动剖面浮标耐压结构已经采用球形设计,浮标受压后变形小且可减轻浮标自重;单冲程柱塞泵改变为体积较小的液压泵,提供超高压的同时可以充分利用球体空间。目前,常规自动剖面浮标已广泛应用到海洋环境数据的调查、收集,而深海自动剖面浮标仍处于研发与试验阶段,面临诸多的技术挑战,对浮标的可靠性提出了更高的要求。 相似文献
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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
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北斗剖面浮标数据服务系统主要由北斗剖面浮标数据自动接收/监视子系统和北斗剖面浮标数据解码、处理及分发共享子系统组成,具备自动、批量、业务化接收国产北斗剖面浮标数据,以及业务化处理和分发浮标数据的能力,为我国主导建设南海或“21 世纪海上丝绸之路”Argo 区域海洋观测网提供了关键技术保障。催生的中国北斗剖面浮标数据服务中心,也为北斗剖面浮标走出国门、参与国际竞争奠定了坚实基础,成为世界上 3 个有能力为全球 Argo 实时海洋观测网提供剖面浮标观测数据服务的国家平台之一。 相似文献
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Development of a System for 3D High-resolution Seismic Reflection Profiling on Lakes 总被引:2,自引:0,他引:2
A high-resolution three-dimensional (3D) seismic reflection system for small-scale targets in lacustrine settings has been
developed. Its main characteristics include navigation and shot-triggering software that fires the seismic source at regular
distance intervals (max. error of 0.25 m) with real-time control on navigation using differential GPS (Global Positioning
System). Receiver positions are accurately calculated (error<0.20 m) with the aid of GPS antennas attached to the end of each
of three 24-channel streamers. Two telescopic booms hold the streamers at a distance of 7.5 m from each other. With a receiver
spacing of 2.5 m, the bin dimension is 1.25 m in inline and 3.75 m in crossline direction. To test the system, we conducted
a 3D survey of about 1 km2 in Lake Geneva, Switzerland, over a complex fault zone. A 5-m shot spacing resulted in a nominal fold of 6. A double-chamber
bubble-cancelling 15/15 in3 air gun (40–650 Hz) operated at 80 bars and 1 m depth gave a signal penetration of 300 m below water bottom and a best vertical
resolution of 1.1 m. Processing followed a conventional scheme, but had to be adapted to the high sampling rates, and our
unconventional navigation data needed conversion to industry standards. The high-quality data enabled us to construct maps
of seismic horizons and fault surfaces in three dimensions. The system proves to be well adapted to investigate complex structures
by providing non-aliased images of reflectors with dips up to 30°. 相似文献
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中国科学院海洋研究所剖面仪研制组 《海洋科学集刊》1974,(9):17-26
近十年来,探测海底几十米至几百米松散沉积层分层结构的“海底浅地层剖面仪”已逐步发展定型,并广泛用于海底工程施工和海洋地质研究方面。这种浅地层剖面仪主要采用以下几种声源装置:电致伸缩器件、磁致伸缩器件、电磁脉冲声源、电火花放电器以及气枪。
浅层剖面仪实际上是一种以地层为探测目标的主动声纳,本文给出了有关的声纳方程式,它将有助于这类仪器的工程设计和性能预报。
从探层声纳方程式出发,采用电磁脉冲声源研制了浅层剖面仪,获得了穿透地层几十米的较高分辨率的记录。对此,本文也作了简单的介绍。 相似文献
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本文介绍863-818支持研究的最新成果“海床基海洋环境自动监测系统”的功能、特点及关键技术、海底基海洋环境自动监测系统是一种在海底工作的、自容式综合测量装置,它可布设于河口、港湾或者近海海底,对悬浮泥沙参数以及引起悬浮泥沙运移的海洋动力参数进行长期,同步、自动测量。为分析研究各种海洋动力条件下特别是大风浪条件下悬浮泥沙的运移规律提供资料。它对于海洋工程建设、航道疏浚、海港整治下水管缆铺设,海上安 相似文献
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本文简述了自动监测系统现场安装的重要性,提出了设备安装的检查,现场的准备,及设备的安装方法和注意事项。 相似文献
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根据海洋监测仪器及系统工作环境的特点,需要从高可靠性、低功耗、长时间工作、小体积、轻重量等几个方面进行深入分析和研究。论文设计的海床基自动监测系统的中央控制单元,采用工业MSP430、带中断输出的时钟芯片DS1305、FLASH RAM和低阈值VMOS功率管等低功耗3.3 V器件,应用中断和休眠软件设计方法,很好地满足了使用要求。通过实验和分析,指出了低功耗海洋监测仪器及系统设计的基本原则,总结了MSP430闲置的管脚处理、上拉电阻阻值合理选择和电池自放电电流等问题的解决方案和应用经验。 相似文献
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Balugin N. V. Fomin B. A. Yushkov V. A. 《Izvestiya Atmospheric and Oceanic Physics》2022,58(3):314-320
Izvestiya, Atmospheric and Oceanic Physics - The operation principle of an optical aerosol sonde is based on detection of radiation scattered in a free atmosphere from a sequence of light probing... 相似文献