基于cc2530的温室大棚智能监测系统设计

分析了目前我国温室大的棚发展现状,针对传统温室大棚监控的不足,本文设计了基于ZigBee技术的温室大棚智能监测系统,采用ZigBee无线通信节点解决了传感器之间繁琐的布线问题,通过无线传送把温室大棚内的空气温湿度、土壤湿度、CO2浓度和光照度数据上传到监控中心,能让工作人员第一时间了解温室大棚的情况,以便及时做出应对措施。     

基于ZigBee技术的温室环境智能监测系统

针对传统温室布线有线监控系统所带来的组网复杂以及系统维护难度大等缺点,提出并设计了一种基于Zig Bee技术的温室环境智能监测系统。该系统以TI公司的CC2530为主控制芯片,整个无线传感网络由协调器节点、路由节点和终端节点构成。终端节点实时监测温室内的各种环境信息(土壤水分、空气温湿度、CO2浓度等),并且以无线的方式发送给协调器节点,最终通过发送给通过VB编写的上位机软件用户终端,采用数据库对数据进行实时的存储等操作。现场试验表明,该系统运行稳定、操作简单,达到了预期的应用目标。     

基于WSN的农业大棚智能环境监控系统研究

文章研究了基于WSN的农业大棚环境监控系统,分别从环境监控系统的硬件设计、软件设计以及系统优化几个方面进行了分析和研究。以保定地区草莓种植基地作为测试环境,对本系统进行了为期3个月的测试。实验结果表明,本系统能够实时、准确地采集环境信息。     

基于Zigbee技术的煤矿井下通风机监控系统设计

针对目前煤矿井下通风机监控系统布线困难、可移植性差等缺点,笔者基于Zigbee技术,设计了煤矿井下通风机监控系统。该系统无需在井下铺设网络线路,通过Zigbee传输协议,在地面上完成对井下带式传送机整个运行过程的监测显示、控制、保护、报警和管理。     

动力环境监控系统在数据机房中的应用

随着网络信息化和机房建设发展迅猛,机房空调和电源等设备的运行状况以及机房环境的安全情况也日渐凸显出其重要性,动力环境监控系统可实现时其集中监控,在机房中的应用越来越广泛.     

基于ZigBee的智能安防系统的研究

现在的新兴建筑在设计之初都采用了预埋有线式门禁系统来保障安全。而对于一些现有和老式建筑,若增加门禁系统来提升安防级别。需要对现有建筑的电气电路进行改造,布线和施工的难度大、成本高。因此,开发无线安防门禁系统就显得尤其重要。     

敏捷反应测试系统设计

敏捷反应测试系统是一组无线灯光系统,由多个三色LED红外感应灯座和1个PAD中心控制器组成。运动员每次训练时以解除或切换灯光为目标。各种测量数据可即时反馈运动员的表现并可下载到电脑作为以后分析用。该系统以CC2530位核心构建的Zig Bee网络,通过红外感应的方式为运动员提供了一种方便高效的敏捷性训练及测试工具。     

无线通信技术在城市照明智能监控网中的应用

简述城市照明监控网现状及问题,提出以ZigBee无线通讯技术为核心,结合RFID、GIS技术构建城市智能照明监控网的必要性和可行性,在实现单灯监控的基础上改善城市照明监控网的节能和防盗功能。     

无线传感器网络在塔式起重机监控系统中的研究与应用

介绍了基于无线传感网络的塔式起重机监控系统结构,分析了ZigBee技术和GPRS技术在当前塔机监控系统中的应用研究现状以及存在的问题,指出将ZigBee技术和GPRS技术相结合应用在塔机无线监控系统中的优势,为塔机无线监控指出发展趋势和研究方向。     

Application of an integrated environmental monitoring system to an incineration plant

An integrated environmental monitoring system is an innovative approach which allows remarkable understanding of impacts due to a contamination source. Here we report results from environmental monitoring near a typical Italian incinerator plant. By means of mathematical dispersion models, zones of maximum pollutant depositions were determined; according to these simulations, a defined monitoring network was established. Heavy metals, chosen as environmental indicators, showed a wide flux range in gas emissions from the incinerator, over different sampling years. In particular, emissions in the year 2000 were marked by high Pb and Cd concentrations. Correspondingly, soil samples also exhibited a greater concentration of the same metals in 2000, than in previous years. Principal component analysis allowed a better visualisation of these similarities, also showing an interesting correlation between heavy metals observed both in gas emissions and in soil samples. Soil distant from the incinerator was found to be less affected by heavy metal contamination. Also atmospheric wet and dry depositions indicated a significant dependence on distance from incinerator, though extremely variable metal fluxes were registered during different months. Finally, vegetation samples, seasonal or evergreen, did not provide evidence of a significant heavy metal enrichment, apart from an apparent dependence on contamination source distance.     

生物传感器在环境监测中的应用进展

介绍了生物传感器的基本组成、工作原理、分类及其在环境监测上的应用,主要有生化需氧量的测定、酸雨、水体富营养化、细菌总数、硫化物、有机农药、表面活性剂、酚等的测定等,同时探讨了生物传感器存在的不足,并对生物传感器的发展方向及前景进行了展望。     

Bootstrap interval with application in environmental monitoring

ABSTRACT

Environmental research data usually present high variability because of the presence of outlier values. This study sought to apply the interval bootstrap method, as compared to Chebyshev’s Theorem, for the statistical assessment of environmental data with anomalous values. The results obtained showed that: (a) the bootstrap method is an excellent alternative in the assessment of environmental data with outliers; (b) the method percentile bootstrap (Boot-perc-s) presented the lower interval amplitude to the concentrations of ²²⁶Ra, and (c) Chebyshev’s Theorem presented the highest interval amplitude for the concentration of ²²⁶Ra.     

Prediction of WSN placement for bridge health monitoring based on material characteristics

WSN signal obstruction from various bridge components, including girders, bracings and connectors, can affect the performance and reliability of wireless communication. Although the placement of sensor nodes is essential for forming a mesh or ad-hoc network, there are no quantitative approaches related to the optimal separation distance of each node and the corresponding signal quality. This paper reports the results of an experimental evaluation of the WSN performance in the obstructed environment of a bridge structure. The performance criteria, such as thickness of bridge components, material types and location, were analyzed to determine quantitatively the packet reception rate and allowable separation distance during wireless communication. In addition, a case study was conducted to identify the practical implication that an obstructed environment degrades the communication range and WSN reliability according to the performance criteria. The results show that the WSN placement mainly depends on the material type and object thickness.     

环境监测中有机污染物分析的特点

论述了环境监测中有机污染物分析的特点,包括样品前处理、监测仪器、人员要求等,内容涉及有机污染物监测的流程、各种前处理技术、分析仪器等,提出了我国培养有机污染物监测技术人员的必要性。     

Implications of soil complexity for environmental monitoring

International proposals for national soil and environmental monitoring lack adequate awareness of the diversity and complexity of soils. These need to be considered in sampling and reporting. This paper provides examples of the diversity and complexity of soil and environmental conditions in Bangladesh and Ghana, including differences between physiographic regions, within soil toposequences, between and within neighbouring fields, and in areas of shifting cultivation. These examples show that large numbers of sites would need to be sampled and monitored to provide the information required for the national environmental accounting envisaged. Detailed studies are needed in countries with relevant soil monitoring capacities to determine the scale of sampling required and the feasibility of conducting national monitoring. Where the latter is considered infeasible, the contribution that more limited measures could make to environmental monitoring needs to be examined. There is scope for useful academic studies to be made of environmental variability and practical monitoring techniques.     

Epidemiological monitoring of environmental lead exposures in California State Hospitals

Blood lead screening of 8062 state hospital residents in California revealed 143 residents with excessive lead levels (greater than or equal to 30 micrograms/dL). This screening was part of the Childhood Lead Project and was performed in 1978. The purpose of this study was to identify "critical" lead sources in California State Hospitals. Accurate identification is crucial if subsequent abatement programs are to be effective. The strategy involved the following sequence of steps: 1) Selection of cases based on blood lead and erythrocyte protoporphyrin screening. 2) Determination of pica habits and environmental exposures through interviews with ward's staff and/or parents. 3) Measurement of lead levels in environmental samples reflecting exposures. 4) Interpreting these data in order to identify critical lead sources. 5) Reducing exposure to critical lead sources. 6) Following up of cases and controls to validate the effects of this strategy. A group of 36 lead-burdened cases with pica (30-60 micrograms Pb/dL blood) and 36 matched controls (PbB less than 20 micrograms/dL) were selected from among the developmentally disabled residents of two California State Hospitals. These subjects were studied in order to identify the lead sources to which they were exposed and to abate the major ones. Three major lead sources were found in the state hospitals: wall and furniture paints (100-45,400 micrograms Pb/g paint); surface soil (33-570 micrograms Pb/g soil); educational format was presented to all involved staff. The results have indicated a trend towards lower lead intake by the lead-burdened cases. In one of the two hospitals a "lead-free unit" had been established. All the lead-burdened cases were transferred to this unit in August 1981. A few months later the blood lead levels of all the cases dropped below 30 micrograms/dL. Initial epidemiological monitoring indicated where there were preventable hazards, which abatement efforts succeeded in reducing. Further monitoring of such problems is indicated in this and other developmentally-disabled populations.     

GNSS监测技术在黄土滑坡监测中的应用

简要介绍GNSS实时变形监测系统的组成、工作原理。以晋城市某黄土滑坡变形监测的实例分析,介绍了该滑坡的基本情况,GNSS技术在滑坡监测应用中的方法、监测网的布设,通过对滑坡监测数据处理及分析,对所生成的位移变化曲线图进行解读,得出了该滑坡目前基本稳定、没有明显的变形趋势的结论,体现了GNSS实时变形监测系统在滑坡变形监测实际应用中的优势,为同类型黄土滑坡变形监测提供参考。