一种新型采集节点的设计及其在桥梁健康监测系统中的应用

针对现有桥梁结构健康监测系统数据采集节点的不足,基于传统RS 485工作模式提出并设计了一种新型采集节点工作模式,总线上的其中任意一个采集节点均可作为控制主机使用,其余节点为从节点,以此使得采集系统更加简洁。采集到的数据保存到内部存储FLASH上,保证数据不会丢失,提高了其可靠性。该类采集节点已在某城市立交桥长期健康监测中得到了应用,结果表明:该采集节点具有采集精度高、可工作于主/从模式、操作方便等优点,为桥梁结构健康监测提供了一种新的选择。     

基于CC2530的滑坡监测系统设计

滑坡监测是一种常用的地质灾害监测与预报手段。根据滑坡体变化特点以及检测环境特征提出了基于CC2530的滑坡监测系统设计。该系统以CC2530为核心控制芯片,由采集节点、基站、监控主机和PC机4部分组成。多个采集节点和基站采用Zigbee协议组成无线网络,以传递采集的滑坡位移、土壤温度、土壤湿度、倾斜度等信息。基站利用G...     

传感器网络中的节点能耗监测软件设计与实现

为了有效延长节点工作寿命,设计一种新型的传感器网络节点能耗监测软件。传感器网络节点能耗监测系统的硬件主要由FPGA和控制板组成,所设计的软件将针对二者的工作流程进行控制。FPGA使用软件给出的采集程序和节点能耗识别码,进行传感器网络节点能耗数据的持续采集和模数转换。被转换成数字信号的节点能耗数据将被采集程序封装并传输到控制板。控制板根据数据读取流程对封装数据进行重构,获取完整的节点能耗数据并进行解析,给出节点能耗调节建议,实现对传感器网络节点能耗的监测。经实验验证可知,所设计的软件监测距离较远、传感节点工作寿命延长性能颇佳。     

基于ZigBee的风电机组振动故障监测系统设计

：针对目前风电机组有线监测系统安装、维护不便和监测点有限等问题,设计了基于ZigBee的风电机组振动故障监测系统,由传感器节点、协调器节点、3G网络和监控中心组成。传感器节点采集机组各部位的振动参数并发送至协调器节点,经过协调器节点处理的信息通过3G网络发送至远程监控中心,此设计提高了系统的可靠性和实时性。测试结果表明系统节点间通信良好,系统工作稳定性高,数据传输实时性好,及时给出报警信息,故障诊断正确率达到95.5%。     

基于GPRS的土壤温湿度采集系统

设计了一种基于GPRS的土壤温湿度实时采集系统,给出了一种基于无线传感器网络的环境监测方案。无线传感器网络是由大量随机分布的传感器节点,通过无线通信技术自组织构成的网络,传感器节点具有数据采集处理、无线通信和自动组网能力。文中利用Telosb节点平台设计了传感器节点的硬件结构,并在TinyOS操作系统的基础上,完成了节点的软件设计。该系统可以对目标监测区内多点的温湿度进行实时采集,实现单跳和多跳的数据传输,同时利用GPRS进行高效可靠的远程传输,实现长期动态监测。     

基于ZigBee与Android结合远程监测系统设计

文中提出了一种基于ZigBee与Android平台相结合的水质参数远程监测系统,该系统实现了对水位、温度、p H和溶氧等水质参数信息的采集、存储与管理。采集部分采用了TI公司CC2530芯片,传感器节点采集水质参数后将数据利用ZigBee技术发送到汇聚节点,再通过GPRS模块发送至远程服务器,最后由服务器向Android客户端发送水质参数数据。这样通过Android客户端就可以完成对水质参数的监测。文中系统在江苏扬中水上生态乐园试验基地进行实验实际调试,温度、p H、水位各项监测指标均能达到要求。     

航站楼环境参数分布式监测系统设计

为监测航站楼内环境质量,设计了基于WIA-PA环境参数无线实时监测系统。该系统由多个检测节点组网,对航站楼室内各区域CO2浓度及温度进行采集。系统采用STM8作为检测器节点微控制器,通过变周期数据传输机制及WIA-PA协议将采集的航站楼各区域环境参数数据传输到上位机。上位机监测软件通过开辟多线程实现数据可视化显示。实验和应用结果表明,采用变周期数据传输模式,节点功耗可降低66.97%,网络平均丢包率为0.43%。系统功耗低,数据传输稳定。     

基于ZigBee的健身数据无线采集系统

文中设计是基于Zig Bee无线传感器网络技术,面向健身俱乐部开发的健身数据无线采集系统。系统主要由佩戴于每个健身会员腕部的无线采集节点、数据采集汇聚节点、计算机等组成,通过人体随身携带的无线终端实时采集运动者的体温与脉搏数据,所有节点与汇聚节点共同组成一个无线传感器网络,汇聚节点与计算机通过串口进行通信,节点采集的参数通过汇聚节点实时传递到计算机上位机程序中。通过文中系统可以实现健身会员的信息管理及健身参数的实时采集,并根据记录数据进行运动效果评价。适用于无线数据采集、健身者运动量分析评价以及长期的健康监测。     

基于无线传感器网络的数据采集系统设计

针对恶劣环境下远程未知监测区域,进行现场数据采集比较困难和危险的问题,以无线传感器网络技术为基础,设计了一种高精度数据采集系统。系统的无线声音传感器网络节点以FPGA为主控芯片,系统采用了模块化设计的思想,包括含有实现节点与上位机通信功能的USB数据接口模块、调理转换声音信号的采集调理模块、无线通信的无线收发模块、存储数据的存储模块、负责节点供电的电源管理模块。测试结果表明,系统最终可实现在24 KHz的采样率下对监测区域内频率为1 KHz的不同声音信号高精度采集。     

基于ZigBee无线传感网络环境监测系统设计与应用

为了高效便捷准确的监测环境中的温湿度、灰尘等,提出了一种基于ZigBee协议无线传感网络环境监测系统方案,利用了其低速率、低功耗、延时短、网络存储量大且具有自动组网和自愈功能等特点。系统中,硬件平台为TI公司的CC2530主控芯片,软件平台基于Z-Stack协议栈标准,现场终端节点上采集到的数据,通过无线或者USB串口上传至PC机。实验结果表明：终端节点采集的数据准确可靠,实现了区域化数据监测,无线化的监测系统具有较好的应用前景。     

InternetQuestion and Answer (iQ&A): a Web-based surveytechnology

Presents “InternetQuestion and Answer” (iQ&A), a Web-based survey development and implementation technology, which has been designed for constructing online surveys for educational, medical or administrative purposes. The iQ&A system is a three-tiered database-backed Web system that has been developed to support a wide range of applications. Surveys are considered as general data collection instruments and include a wide field of application. iQ&A facilitates rapid survey construction and administration, which is ideally suited for biomedical research as well as other research and educational activities. Full report management capabilities provide the survey publisher with online access to current information on survey responses. Current implementations of this technology in the areas of biomedical applications of clinical trials, longitudinal research and other research-related systems are presented. Further refinement of the current system should lead to a powerful general survey technology for broad-based applications     

Survey of Adaptive Image Coding Techniques

The following is a survey of the technical literature on adaptive coding of imagery. Section 1 briefly discusses the general problem of image data compression. The optimum image data compression system, from a theoretical viewpoint, is presented in Section 1.1. The theoretical and the implementational problems of the optimum system are discussed and the assumptions that are made to overcome these problems are outlined. One important assumption is the stationarity which is not true for most imagery. In adaptive systems the parameters are varied according to changes in signal statistics optimizing the system performance for nonstationary signals. In this article the adaptive systems are divided to four categories. Section 2 is a survey of adaptive transform coding systems. Section 3 discusses adaptive predictive coding systems. Sections 4 and 5 discuss adaptive cluster coding and adaptive entropy technique, respectively.     

Automated microwave oven survey systems: evaluation criteria and procedures

Criteria and evaluation procedures have been established to assess the measurement accuracy of Automated Microwave Oven Leakage Survey Systems. These criteria and procedures are based upon analytical characterizations of the oven leakage fields, measurement data and statistical analysis and experience gained from evaluation of hand-held oven survey instruments. Results of our evaluation of a typical survey system are presented.     

手机无线勘察系统功能分析和应用

介绍了手机无线勘察系统的体系结构，重点从智能手机和勘察工作相结合的难点出发，深入到勘察流程、采集内容、数据获取呈现等方面，分析和研究了手机无线勘察系统的功能，从而提高勘察工作效率。     

基于SOPC的数据采集与处理系统设计

基于矿井地震勘探中对数据采集与处理的高性能要求,本文采用SOPC(可编程片上系统)技术设计了多通道数据采集与处理系统。系统采用24位模数转换芯片实现高精度数据采集;利用FPGA可并行运算的特点,实现数据信号的并行处理。系统设计灵活,具有便携性及同步性特点。该系统成功应用到矿井地震勘探中,得到了良好的效果。     

基于PLC的物料包装输送监控系统

物料输送广泛应用于产品包装、流水作业、检测等相关行业中,对监控系统的准确性、可靠性以及自动化水平都有很高的要求.根据物料输送系统的实际需要提出了基于PLC和WinCC人机界面软件的硬件结构、控制思想和软件设计.系统已在内蒙古天野化工化肥传输自动控制中使用,整个系统组网方便、运行可靠,达到并满足设计的目的和要求.     

The Role of the Airborne Traffic Situation Display in Future ATC Systems

The historical evolution and current status of the airborne traffic situation display concept is presented as well as a survey of related technological developments in collision-avoidance systems, area navigation equipment, and data links. Two alternative ATSD systems configurations are discussed: one deriving aircraft positions from ATC surveillance, the other deriving aircraft positions from air-to-air data exchanges. Based on the results of a Massachusetts Institute of Technology simulation study of airborne traffic situation display capabilities, a review of the many possible applications of the device is presented. Significant benefits in greater system capacity, greater safety, and an overall improvement in operational efficiency are predicted. A reduction in ATC capital and operating costs appears to be realizable if the ATSD is accepted as an integral element in future ATC system designs. Finally, the airborne computer-display capability required for the ATSD provides a fresh opportunity to combine, enhance, and integrate many of the cockpit functions that are now carried out by a proliferation of separate devices.     

Model-based characterization of electromagnetic inductionsignatures obtained with the MTADS electromagnetic array

A sensor response model based on empirically determined orthogonal response coefficients β is presented for the analysis of electromagnetic induction (EMI) sensor data. The model is applied to high-quality survey data from the multi-sensor towed array detection system (MTADS) program. Data from both a prepared test range and a live-site survey are analyzed. At the test field, the authors show that the model successfully reproduces the measured signatures of ordnance, ordnance simulants, flat plates, and clutter. At the live site, fit statistics were collected showing that for the most abundant ordnance target, 81-mm mortars, the three beta response parameters are distributed log-normally. This allows for a simple method of discrimination. A receiver operating characteristic (ROC) analysis based on this discrimination method is performed and the results discussed     

一种远程辅助勘察系统的设计与实现

针对4G无线项目勘察过程中,现场勘察资料可靠性不高、管理不集中等问题,本文设计实现了一种远程辅助勘察系统,以信息化、集中化的方式管理、审核现场勘察信息,提高勘察数据的准确性和使用效率。     

基于北斗卫星的海洋调查测量监控系统的设计与实现

通信针对目前我国海洋调查测量单点作业模式的现状,采用我国自主研发的＂北斗＂卫星导航系统作为无线信道单元,设计了基于北斗卫星的分布式海洋调查测量监控系统,实现岸站或母船的监控中心对一个或多个测量终端的遥测遥控,建立了船与岸、船与船之间的实时联系,形成分布式的海洋调查测量模式,对海量调查数据的实时高效传输及实时调整调查测量计划任务都具有战略性的意义。