通用非接触式IC卡读卡器的开发

介绍了非接触式IC卡读卡器的开发,具体阐述了非接触式IC卡读卡器的电路设计和软件开发.     

基于单片机的射频卡读卡器设计

以射频识别技术为基础,介绍了基于MFRC500读写卡芯片和P89V51RD2型单片机的射频卡读卡器的设计方法。简要介绍了Mifarel卡内部结构和工作原理,详细阐述了读卡器硬件电路设计和软件开发。     

RFID技术在智能催芽识别系统中的应用

智能催芽识别系统采用非接触式射频识别RFID技术,系统由电子标签、RFID读卡器、主控制器等组成:RFID读卡器读取电子标签内的产品信息;主控制器按照Modbus协议的格式接收RFID读卡器读取到的信息,通过数据匹配等技术手段识别出相应的种子品种,便于催芽室为不同的种子提供最佳的发芽环境。     

基于RFID射频识别技术的道路交通管理系统设计与开发

本文介绍了一种由基于射频识别技术的芯片与微控制器组成的射频标签与读卡器系统.文中阐述了系统的设计,包括标签模块,读卡器模块,通信模块,以及各种主要单元模块的功能和工作过程.并将这一系统应用于实际的道路交通,对于强化交通管理、维护交通秩序能发挥良好的作用.     

IC卡式热能表充值系统的设计

IC卡式热能表充值系统是专用于IC卡式热能表充值管理的系统，本文从整体上介绍了IC卡式热能表充值系统的设计过程，设计包含读卡器和安装在PC机上的充值系统软件两部分的设计，并选用RS232 Modbus协议作为读卡器和PC机之间通信方式。     

基于UWB技术的煤矿井下定位系统研究与设计

针对煤矿井下设备管理不规范,使用效率不高的问题,提出了一种基于UWB技术的井下设备定位系统.根据井下实际环境,建立无线定位系统整体方案,读卡器与定位标签之间通过UWB进行无线通信,利用信号强度与三边测定法进行定位标签的二维定位,并对定位分站、读卡器与定位标签的结构进行了设计.通过实验模拟巷道环境,对系统的定位精度进行试...     

基于RFID和Zigbee网络的分布式考勤系统设计

本文结合RFID和Zigbee两者的技术优势,摒弃传统考勤系统有线连接的方式,在无源电子标签和RFID读卡器的基础上,设计并实现了一种与Zigbee网络融合的分布式考勤系统。通过实际的部署与验证,该考勤系统在读卡设备部署的灵活性上有明显的优势,可支持大量的读卡器同时工作,能适应较为复杂的楼宇环境。     

公交一卡通读卡器设计

公交一卡通读卡器由STM32微控制器、RFID射频读写卡模块、输入按键以及LED显示等电路组成。微控制器通过SPI总线与RFID读写卡模块通信,采用FM1702SL芯片设计RFID射频读写卡模块,该读卡器能完成公交一卡通的读写操作,LED显示当前时间和卡内金额。设计方案简单且成本低,实验表明性能可靠稳定。     

基于门禁系统中4001型ID卡读卡器的设计

文章主要以在门禁考勤系统应用中,提出了以4001型RFID卡作为考勤卡的读卡器设计,简单介绍了硬件和软件的实现方法.     

使A-B公司触摸屏显示中文的办法

考虑到目前大多数操作员的英语水平,需要让触摸屏能够显示中文,可方便操作及缩短培训时间。但是A-B公司的触摸屏(例如:panelview1000c)如果要显示中文,必须安装存储卡,购买原装存储卡价高且采购周期长,在此介绍一个廉价的办法,使触摸屏能够显示中文。到市场上购买一个CF卡,即普通数码照相机用的存储卡(注意不要买SO N Y用的记忆棒),容量为4M就足够了。再买一个CF卡读卡器,即能插在笔记本电脑的PCM C IA插槽的读卡器。将C F卡插入读卡器,然后再插入笔记本的PCM CIA卡插槽(注意方向不要插错)。这时笔记本将识别存储卡,请将其格式化,…     

非接触式13.56MHz读卡器的设计

针对非接触式13.56 MHz读写器存在功耗高、体积大等问题,提出了一种低功耗、高安全性的研究模型。模型采用MSP430F2274为主控芯片,采用MF RC522为射频芯片,在保证通信稳定、抗干扰力强、通信距离能达到10 mm的前提下,可以使系统有效降低功耗和体积。实验结果表明:系统3.3 V供电完全适合MF RC522供电要求,实现了低功耗和体积小的完美结合。     

联合全资产可视化系统设计与试验

以联合全资产可视化为背景,针对军队在运资产物流数据不可视的难题,设计并开发了射频识别系统。利用AT89C2051和nRF905为主要芯片,设计并实现了有源RFID系统,对有源RFID系统中的硬件构成和关键通信程序作了详细介绍,并通过试验有源RFID系统作了测试和分析,系统在视距100m范围内,可对<80km/h速度移动的电子标签进行正确读写。整个射频识别系统能够满足军队物流的需求,在联合全资产可视化系统中有着较好的应用前景。     

Radio Frequency Technology for Automated Manufacturing and Logistics Control. Part 1: Passive RFID Systems and the Effects of Antenna Parameters on Operational Distance

Identification plays an important role in automation. In the near future radio frequency identification (RFID) will be an option for mass production automation projects. RFID represents a contactless method for data transfer in object identification. Generally, RFID systems consists of three components: 1. A small electronic data carrying device called a transponder, or a tag that is attached to the item to be identified. 2. A reader or a scanner that communicates with the tag by using radio frequency signals. 3. A host data processing system that contains information on the identified item and distributes information to other remote data processing systems. An RFID system can be considered as a wireless communication system because the scanner communicates with the tag by using electromagnetic waves at radio frequencies. The performance of this communication link can be studied by determining the read range for backscatter RFID systems. The read range, or the distance at which the reader unit notices the tag, depends on many factors. Several parameters, e.g. the frequency used for identification, the gain, the orientation and the polarisation of the reader antenna and the transponder antenna, and the placement of the tag on the object to be identified, will all have an impact on the RFID system read range. In this paper, Part 1, we focus on presenting an overview of different passive RFID systems and the read range of the backscatter RFID system. The function of frequency, antenna gain and polarisation mismatch are analysed and discussed. In Part 2, several manufacturing automation cases of different natures will be presented. These cases contain a selection of requirements for an RFID system and they are analysed using the information presented in this paper.     

浅议高校图书馆的读者服务工作

文章针对高校图书馆的现状,分析了复合图书馆读者服务的地位和作用,并就图书馆的读者服务工作提出相应的对策.     

基于RFID的药品管理系统

为了实现药品的防伪和追踪,基于射频识别(RFID)技术开发了一个药品管理系统。利用UHF900MLow Level Operation类封装了900 MHz读写器,方便地进行900 MHz读写器打开或关闭、寻卡、读卡、写卡等操作。基于Qt进行药品管理系统中标签初始化、药品流通各个环节信息记录的界面设计,并通过信号/槽这种异步方式进行读写器事件的处理,实现有效的药品管理和追溯。     

高品质抗混叠滤波器的设计

本文介绍了在采样系统中如何设计高品质抗混叠滤波器。首先介绍了如何用分离元件来设计典型滤波器如贝塞尔滤波器．巴特沃斯滤波器．切比雪夫滤波器等的方法。然后讨论了采用集成电路芯片来设计抗混叠滤波器的方法。     

Development of an automated MODS plate reader to detect early growth of Mycobacterium tuberculosis

In this work, an automated microscopic observation drug susceptibility (MODS) plate reader has been developed. The reader automatically handles MODS plates and after autofocussing digital images are acquired of the characteristic microscopic cording structures of Mycobacterium tuberculosis, which are the identification method utilized in the MODS technique to detect tuberculosis and multidrug resistant tuberculosis. In conventional MODS, trained technicians manually move the MODS plate on the stage of an inverted microscope while trying to locate and focus upon the characteristic microscopic cording colonies. In centres with high tuberculosis diagnostic demand, sufficient time may not be available to adequately examine all cultures. An automated reader would reduce labour time and the handling of M. tuberculosis cultures by laboratory personnel. Two hundred MODS culture images (100 from tuberculosis positive and 100 from tuberculosis negative sputum samples confirmed by a standard MODS reading using a commercial microscope) were acquired randomly using the automated MODS plate reader. A specialist analysed these digital images with the help of a personal computer and designated them as M. tuberculosis present or absent. The specialist considered four images insufficiently clear to permit a definitive reading. The readings from the 196 valid images resulted in a 100% agreement with the conventional nonautomated standard reading. The automated MODS plate reader combined with open‐source MODS pattern recognition software provides a novel platform for high throughput automated tuberculosis diagnosis.     

基于RFID的服装防伪系统的设计与实现

为解决目前国内服装行业所使用的条码扫描系统存在感应范围小及易受污染等限制的问题,采用RMU900,射频读写模块与上位机管理系统相结合,提出了一种基于无线射频识别(RFID)的服装防伪系统设计方案.将服装标签以电子芯片为载体附在每件服装上,并将生产商、销售地与生产日期等信息写入标签中,同时可以锁定编码,防止恶意修改,可以有效地解决品牌服饰的防伪、防止跨省串销等问题;通过借鉴轻量型中间件的思想,采用带抽象产品角色的简单工厂模式实现了读写器驱动模块,保留了各种读写器接口,易于后期维护与扩展.实践结果证明,采用RFID解决方案的服装防伪系统可实现多标签读写的批量操作,操作速度快,极大地改善了产品处理的效率和准确性.     

基于CAN总线的门禁读卡控制器设计

CAN总线是一种有效支持分布式控制和实时控制的现场总线控制网络。该文介绍了CAN总线在门禁系统中的应用设计,给出了门禁系统的整体结构和基于CAN总线的门禁读卡控制器的总体结构,着重介绍了读卡控制器的软硬件设计。     

Chromatic shift in multicolour confocal microscopy

Multicolour confocal microscopy has proven to be a successful technique for the analysis of the spatial relationship between different biological structures in the same preparation. However, when the positions of objects are compared, e.g. co-localization and distance measurements, any positional shift that arises between the colour components is clearly unacceptable. This paper presents a simple technique for measuring with high accuracy the positional shifts that occur between the colour components of an image. Multi-labelled microbeads were scanned using two or three different detection channels. The position of each microbead was calculated separately for each detection channel. In general, the two calculated positions of the same microbead (one for each channel) are slightly different. This difference is a measure of the positional shift between the colours. This method enables the measurement of shift with a high accuracy (20 nm), and it has been applied to images from several experiments. The results of these experiments will give the reader an impression of typical contributions of different effects (such as chromatic aberration, misalignment of optical components and inaccuracy of the scanning unit) on the amount of positional shift.