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针对舰船磁场检测这一问题,提出了一种利用 PNI 磁传感器测量的方案,并设计了一套由 STC15 单片机控制的舰船磁场检测系统。 系统由 PNI 磁传感器、STC15 单片机、串口通讯模块、电源分配模块和上位机组成,实现了信号的采集、调理、传输和分析处理的过程。 最后,通过水池船模试验证明了该测量系统能够实现对舰船磁场信号进行检测。 相似文献
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《海洋技术学报》2017,(6)
全球约有10亿ha的土壤受到盐渍化的危害,对其的监测、评价、预警对于农业开发及粮食增产具有重要的指导意义。基于物联网技术研发了一套原位滨海盐渍土的监测管理系统,系统包括上位机、下位机及传感器终端。其中传感器终端采用四针型传感器进行测量,同时测量温度和含水率等参数以对电导率进行校正。下位机由中央控制模块、通讯模块、测量模块及电源管理模块组成。中央控制模块采用CC2530微控制器,而通讯单元则采用GTM900-C GSP/GPRS通讯模块进行数据的原位传输。上位机采用兼容性与扩展性良好的MVC架构,数据调用采用Data Service和Map Data Service模块相结合,以实现数据的空间和图层的同步调用功能。此外,网络协议软件和客户端应用程序的设计使得整个监测系统可以时分发、存储、查询和管理测量土壤盐化数据。该套系统的设计研发为滨海盐渍土的开发管理提供了一种新的手段。 相似文献
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一、概述本文介绍的油位测量仪能同时对多个储油罐中的油位高度进行自动测量、数字显示、打印报表和声光报警。与原先的浮子式标尺测高法相比较,提高了准确度,节省了人力,为液位测量的智能化提供了新方法。这种油位测量仪主要由压力传感器和单片微机终端两部分组成,之间用电缆连接。压力测量采用YLY2型振弦式压力传感器,它能把液体静压直接转换为频率输出,便于远距离传输和数字化处理。终端采用MCS-48系列单片微机,完成多路数据采集、多次回归、温度补偿自动报警等功能。 相似文献
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一种新型便携式旋桨流速仪 总被引:1,自引:0,他引:1
介绍了一种新型BH-1型便携式旋桨流速仪,主要由自主研制的流速传感器、手持式主机及微机数据回放处理软件三部分组成.其传感器采用独特的导流筒和导流罩结构设计,增加了系统的抗干扰能力,有效提高了测量准确性.应用单片机技术实现了数据的实时检测与处理,多路存储以及瞬时测量流量功能.通过静态试验标定,表明该流速仪测量范围(0.04~4)m/s,非线性误差为0.874%.该流速仪结构新颖、使用轻巧方便、稳定可靠,已广泛应用于国家海洋局对陆源入海排污口排污监测和海洋环境管理工作中. 相似文献
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本文从传感器检定时如何保证准确地测量其输出信号的角度出发,分析了过去几年我国检定MAREX浮标传感器工作中在测量方面存在的问题,介绍了为解决这些问题而研制的“HJF1-1型浮标传感器检定用测量装置”的工作原理、基本组成和设计思想,并列举了两个实例比较不同测量、计算方法对检定结果的影响,从而提出了在海洋环境自动监测系统的传感器检定工作中一个值得注意的普遍性问题。 相似文献
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电子罗盘在波浪浮标中用于实时提供波浪浮标所处的方位.为解决嵌入了Matlab的电子罗盘校准系统可移植性差、过程繁杂、运行速度慢的问题,设计了新的校准系统.将由14位串行A/D转换器Max194从波高数据采集系统中获得的模拟信号转换成的数字信号接入到微控制器中,微控制器负责控制方位数据的采样频率和A/D转换芯片,再利用串口转换芯片将输出的电平信号转换成RS232信号,由计算机对此进行处理.该系统采用了绘图功能完备、处理速度出众、可移植性好的ProEssentials结合VC++来处理多功能方位测试台采集到的方位数据,并绘制成采样数据比较图和误差图,来直观地展现电子罗盘的误差情况.实验测试表明,该电子罗盘校准系统具有可移植性好、功耗低、稳定性强、运行速度快的特点.该校准系统已经广泛应用于波浪浮标、3m浮标等的生产中. 相似文献
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Ben Elghali S.E. Balme R. Le Saux K. El Hachemi Benbouzid M. Charpentier J.F. Hauville F. 《Oceanic Engineering, IEEE Journal of》2007,32(4):786-797
This paper deals with the development of a Matlab-Simulink model of a marine current turbine system through the modeling of the resource and the rotor. The simulation model has two purposes: performances and dynamic loads evaluation in different operating conditions and control system development for turbine operation based on pitch and speed control. In this case, it is necessary to find a compromise between the simulation model accuracy and the control-loop computational speed. The blade element momentum (BEM) approach is then used for the turbine modeling. As the developed simulation model is intended to be used as a sizing and site evaluation tool for current turbine installations, it has been applied to evaluate the extractable power from the Raz de Sein (Brittany, France). Indeed, tidal current data from the Raz de Sein are used to run the simulation model over various flow regimes and yield the power capture with time. 相似文献
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A prototype supervisory control system for a remotely operated vehicle (ROV) is described and several key elements demonstrated in simulation and in-water tests. This system is specifically designed to fill the needs of JASON, a new ROV under development that will perform scientific tasks on the seafloor to depths of 6000 m. JASON will operate from the ARGO towed imaging platform, which is currently operational. Supervisory control is a paradigm for combined human and computer control. Several key elements of the supervisory control system are presented. These include the closed-loop positioning system based on a high-resolution acoustic navigation system, a monitoring capability for assessing performance and detecting undesirable changes, and an interface that allows the human operator and the computer system to specify the desired vehicle trajectory jointly. 相似文献
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This paper addresses the problem of simultaneous depth tracking and attitude control of an underwater towed vehicle. The system proposed uses a two-stage towing arrangement that includes a long primary cable, a gravitic depressor, and a secondary cable. The towfish motion induced by wave driven disturbances in both the vertical and horizontal planes is described using an empirical model of the depressor motion and a spring-damper model of the secondary cable. A nonlinear, Lyapunov-based, adaptive output feedback control law is designed and shown to regulate pitch, yaw, and depth tracking errors to zero. The controller is designed to operate in the presence of plant parameter uncertainty. When subjected to bounded external disturbances, the tracking errors converge to a neighbourhood of the origin that can be made arbitrarily small. In the implementation proposed, a nonlinear observer is used to estimate the linear velocities used by the controller thus dispensing with the need for costly sensor suites. The results obtained with computer simulations show that the controlled system exhibits good performance about different operating conditions when subjected to sea-wave driven disturbances and in the presence of sensor noise. The system holds promise for application in oceanographic missions that require depth tracking or bottom-following combined with precise vehicle attitude control. 相似文献
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提出计算机辅助配模系统采用与常规计算机绘图系统相同的硬件配置,可使系统具备良好的图形功能和入机界面;系统流程分"数据输入","数据转换","配模设计"和"图形绘制"四个阶段.墙体以中线数据(T,L,Ang)定义,在图形环境下以人机交互方式输入墙厚及中线数据;由建筑平面常具备的对称性设计了映射算法以减少输入工作;根据图形变换原理建立了设计参数的简化算法,利用内圈外圈墙体的闭环特性简化墙面属性判别. 相似文献