单芯片嵌入式网关在煤矿井下人员定位中的应用

设计并实现了单芯片嵌入式网关(TCP/IP转RS 485)以及在煤矿井下人员定位中的应用。在嵌入式以太网的网关构架下设计了嵌入式硬件和软件,并在实际应用中证明该系统具有成本低、集成度高、速率快以及开发周期短等特点。首次将单芯片以太网引入煤矿井下光纤环网,并设计了简化、实用、高效率的服务器/客服端应用程序。     

基于GPRS的远程称重数据采集系统

介绍了基于通用无线分组业务(GPRS)的远程称重数据采集系统的工作原理和软硬件实现方法,该系统可以将称重设备采集到的重量数据和仪表状态通过GPRS网络上传到远程服务器,实现了称重设备的远程管理和维护,系统性能稳定可靠,在实际中取得了良好效果.     

ZigBee技术在家庭网关中的应用与实现

面世不久的ZigBee无线技术具有低功耗、低成本等诸多优点,很适合应用在控制类的家庭网络中。通过在基于ARM7处理器核的微控制器PLC2210上移植实时操作系统μCOS-Ⅱ等技术实现了家庭网关的开发平台。在此平台上,提出ZigBee技术在家庭网关中的实现方案。着重实现了基于MC19132射频收发芯片的无线节点的硬件电路设计和相关软件设计。通过实验证明,ZigBee完全能够满足普通家庭的控制需求。     

车载局域互连网络在线诊断系统

车载局域互连网络(LIN)是适用于车内模块通信的低成本、短距离、低速网络。随着LIN的推广和普及,故障诊断、报文采集等工作已成为LIN应用中急待解决的问题。基于LIN通信协议,提出一种有效的LIN在线诊断方案,通过对传统的SCI模块与SLIC模块的研究,提出基于MC68HC908QL4单片机的报文采集节点系统。实践结果证明该系统是LIN研制、开发的有力工具。     

基于无线传感器网络的空气质量监测站的设计

以无线传感网络技术设计空气质量监测站的传感器节点和网关节点,采用CC2420和MC55作为节点的无线模块进行数据的收发,采用ATMEGA128 8位AVR微处理器进行数据的处理和控制。文中介绍了监测站的基本结构、传感器节点和网关节点的硬件设计及基本工作流程。     

Glycerol as an efficient plasticizer to increase the DC conductivity and improve the ion transport parameters in biopolymer based electrolytes: XRD,FTIR and EIS studies

In the current work Plasticized sodium ion conducting solid polymer electrolytes (SPEs) based on polyvinyl alcohol: methylcellulose (PVA: MC) and sodium iodide (NaI) as the electrolytic salt are fabricated. The SPE films are created using a renowned solution casting procedure, and the results of the experiments are provided. The development of polymers-salt complexes is supported by the Fourier-transform infrared transform (FTIR) analysis. The degrees of crystallinity of the polymers are noticeably decreased as a result of the glycerol plasticizer, according to X-ray diffraction test. The sample inserted with 40 wt% glycerol has the maximum ionic conductivity, according to electrical impedance spectroscopy (EIS). Electrical equivalence circuits (EEC) are used to explore the electrolytes circuit components. For the highest conducting electrolyte, the number density (n), mobility (µ), and diffusion coefficient (D) of ions are found to be 2 × 10²¹, 1.79 × 10^?6, and 4.59 × 10^?8, respectively. A high dispersion of the real component of dielectric permittivity at a lower frequency are used to infer the space charge influence induced by stainless-still (SS) electrodes. The tangent loss spectra show that the bouncing chance per unit time decreases as the glycerol concentration rises.     

Review of validation and reporting of non-targeted fingerprinting approaches for food authentication

Food fingerprinting approaches are expected to become a very potent tool in authentication processes aiming at a comprehensive characterization of complex food matrices. By non-targeted spectrometric or spectroscopic chemical analysis with a subsequent (multivariate) statistical evaluation of acquired data, food matrices can be investigated in terms of their geographical origin, species variety or possible adulterations. Although many successful research projects have already demonstrated the feasibility of non-targeted fingerprinting approaches, their uptake and implementation into routine analysis and food surveillance is still limited. In many proof-of-principle studies, the prediction ability of only one data set was explored, measured within a limited period of time using one instrument within one laboratory. Thorough validation strategies that guarantee reliability of the respective data basis and that allow conclusion on the applicability of the respective approaches for its fit-for-purpose have not yet been proposed. Within this review, critical steps of the fingerprinting workflow were explored to develop a generic scheme for multivariate model validation. As a result, a proposed scheme for “good practice” shall guide users through validation and reporting of non-targeted fingerprinting results. Furthermore, food fingerprinting studies were selected by a systematic search approach and reviewed with regard to (a) transparency of data processing and (b) validity of study results. Subsequently, the studies were inspected for measures of statistical model validation, analytical method validation and quality assurance measures. In this context, issues and recommendations were found that might be considered as an actual starting point for developing validation standards of non-targeted metabolomics approaches for food authentication in the future. Hence, this review intends to contribute to the harmonization and standardization of food fingerprinting, both required as a prior condition for the authentication of food in routine analysis and official control.     

IMT-2000的融合、演进新发展及中国相应策略考虑

本文分析讨论了ＩＭＴ－２０００的融合,演进新发展状况在此基础上结合中国国情,提出了相应策略考虑建议。     

基于LKS32的无刷直流电机的控制系统

本文以无刷直流电机作为研究对象,以LKS32MC086N8Q8控制芯片为核心,研究无位置传感器的无刷直流电机控制系统.通过研究无刷直流电机的现状及问题,通过与其他电机的比较,得出无刷直流电机无碳刷损耗、安全可靠、保养成本低等优点.同时介绍了基于LKS32的无刷直流电机的工作原理及系统结构,并且对无刷直流电机的硬件电路及...