车载导航系统的研究与实现

介绍了一种车载导航系统，该系统基于嵌入式系统平台构成、融合了导航以及车载多媒体功能，基于该嵌入式平台设计的车载地理信息系统采用了单线路网模型，在有效表示路网结构的同时还可以清楚地表示出交通限制信息，通过在北京地区的行车试验表明，该系统可以稳定可靠地在车上运行，在兼容车载多媒体播放的同时，可实现地理信息查询、导航等功能。     

基于嵌入式技术的轨道交通车站设备监控系统研发

本文通过对轨道交通车站设备监控系统的研究,提出了轨道交通车站设备监控系统的研发方案,并对各子系统的功能进行了一定的阐述。     

沥青混合料嵌锁骨架实验分析

文章借鉴体积法思想和粒子干涉理论,分析了细集料的间隙率与粗集料堆积和捣实状态下间隙率的相对关系,并通过路用性能实验分析,得出骨架嵌锁结构沥青混合料优于规范推荐的沥青混合料的结论,对沥青混合料嵌锁骨架研究具有一定的借鉴意义。     

基于嵌入式系统的网络化用电管理系统

提出了一种基于校园网络的学生宿舍用电管理系统.通过现场控制站采集电表数据,该控制站再通过网络接口连接到校园网上,节能办的管理系统通过校园同访问任意的现场操作站.从而可以对某块电表进行远程设置,并读取电表的实时数据.讨论了系统的构成.并对现场控制站采用的嵌入式硬件和软件系统的组成进行了分析.通过这些技术提高了系统的稳定性.     

嵌入式Web服务器在铁路信号设备监控中的应用

介绍在以嵌入式微处理器芯片ARM9200为硬件平台基础,以Linux作为操作系统内核的嵌入式系统上运行Boa Web服务器,最终实现在嵌入式系统上构建以网络监控为目的的嵌入式系统Web服务器,并应用于铁路信号设备的监控.     

Energy-Efficient Deterministic Fault-Tolerant Scheduling for Embedded Real-Time Systems

By combining fault-tolerance with power management, this paper developed a new method for aperiodic task set for the problem of task scheduling and voltage allocation in embedded real-time systems. The schedulability of the system was analyzed through checkpointing and the energy saving was considered via dynamic voltage and frequency scaling. Simulation results showed that the proposed algorithm had better performance compared with the existing voltage allocation techniques. The proposed technique saves 51.5% energy over FT-Only and 19.9% over FT+EC on average. Therefore, the proposed method was more appropriate for aperiodic tasks in embedded real-time systems.     

Application of embedded fibre Bragg grating sensors for structural health monitoring of complex composite structures for marine applications

Fibre reinforced polymer (FRP) materials are recently widely applied in the marine industry. The high popularity of composites and safety requirements results in the development of Structural Health Monitoring (SHM) systems. One of the sensors types that can be permanently integrated with a composite structure and used as a part of SHM system are fibre Bragg grating (FBG) sensors. Among FBG sensors advantages small size, high corrosion resistance, and absence of electric current are especially important in monitoring of composite marine structures.The paper presents an application of embedded FBG sensors arrays for evaluation of complex composite structure — a fast patrol boat. The experimental investigations contain spectra analyses for thin laminate sample (skin), a composite sandwich panel and fast patrol boat hull (sandwich structure). The quality of sensors spectra (before/after embedding and loading) was determined using the Pearson correlation coefficient. The relationship between strain and temperature in exploitation range was determined for laminate and sandwich structures. A linear relationship was achieved for both elements. The relationship for the sandwich panel was then applied during strain analyses of the boat composite hull. The utility of designed FBG sensors array for the panel was also verified by sensors responses on impact excitation in chosen points on the structure. The achieved results were then used during designing FBG sensors array embedded into the hull. FBG sensors spectra deformations due to fast patrol boat hull manufacturing process and exploitation as well as strain curves determined for the boat during tests at dry dock and at sea trials are analysed.     

基于嵌入式Linux的船舶组合导航系统设计与实现

针对小型船舶和引航员对组合导航系统的需求,提出一种基于嵌入式Linux的船舶组合导航系统解决方案,该系统采用嵌入式系统硬件构架、Linux操作系统和嵌入式图形用户界面,在研究嵌入式系统下电子海图的海图数据处理、组织与显示等关键问题基础上提出嵌入式组合船舶导航系统的实现。     

基于ARM嵌入式调距桨控制系统设计方案

调距桨广泛应用于各类舰船上,微机化调距桨控制系统是一个重要的发展趋势.基于高性能ARM嵌入式调距桨控制系统设计方案,提高了调距桨智能化水平,实现了高速匹配算法控制及高效可靠信息传送机制.分布式模块化设计的控制系统具有易维护、可移植、可扩展的特点,为现代船舶工业全船监控网络发展奠定技术基础.     

一种低振动低噪声新型舰用离心通风机

针对现役舰用离心通风机振动大噪声大的问题,本文提出了一种新型离心通风机结构,设计实现了新型通风机的叶片、蜗壳和电机等通风机关键部件,经过性能测试和近140余台的实船应用表明该型离心通风机比普通离心通风机振动低2个数量级、噪声平均地6分贝、体积平均减小30%、重量平均减轻30%、功耗平均降低20%,可显著降低离心通风机的振动、噪声并提高舰船通风效果。