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关键词： RFID技术   船舶故障   电子故障   故障分类   分类系统  

摘要： 目前设计的船舶电子故障分类系统无法精准地识别故障波形,实现故障分类。为了解决上述问题,基于RFID技术设计一种新的船舶电子故障分类系统。系统硬件分别设计了故障采集器、射频收发器和CAN总线节点,选用SPl2采集器对数据进行采集,通过nRF2401A进一步接收信号,利用CAN总线节点进行数据通信。计算频率信号,采集船舶电子数据。分析控制逻辑原理,实现数据传输与交互,计算故障分类数量,通过数据检测完成船舶电子故障分类。实验结果表明,基于RFID技术的船舶电子故障分类系统能够精准地识别船舶电子故障,故障识别准确率在98%以上。

关键词： Location awareness   Radiofrequency identification   Antennas   Antenna arrays   Phase measurement   Hardware   Antenna measurements   UHF RFID   non-line-of-sight (NLOS)   localization   RSS  

摘要： The UHF radio-frequency identification (RFID) has gained growing attention for tagged object localization in smart storage systems. Due to Non-Line-Of-Sight (NLOS) condition, it is challenging to accurately locate the position of tags inside closed spaces. In this paper, we propose a precise and cost-effective solution for tagged object localization in closed spaces, using only received signal strength (RSS) information. We establish a RSS profile for each tag and discover some important features of RSS profiles including uniqueness, time-variation, column-dependence and waveform-similarity. Based on these features, we propose a reference-free RSS-profile (RFRP) localization scheme. The advantage of our propose scheme is to accurately localize multiple tags in closed spaces by overcoming the challenges including the lack of pre-deployed reference tags, NLOS propagation, multi-path propagation and coupling effect. The RFRP scheme first roughly estimates tags' coordinates based on Peak Asymmetry Factor, then acquires reference-tag substitutes through the similarity of RSS sequences. Subsequently, our scheme refines the relative positions of all tags by these substitutes. Finally all tags' absolute positions are estimated through a RSS-ranging model. Extensive experiment results demonstrate that our approach can achieve high ordering accuracy and localization accuracy for the tags inside closed spaces.

关键词： 物流效率   井喷式发展   物流系统   全球定位系统   物流行业   射频识别   物流企业   传感装置  

摘要： 21世纪以来,中国物流业出现了井喷式发展,物流企业从少到多,从分散到集中,企业的规模也日益壮大。从中国物流与采购联合会发布的数据来看,上榜公司的经营收入从最早的2.6亿元到2021年的40.6亿增长了15倍之多。但迅速发展的同时,也不可避免的会面临一些诸如物流总费用与GDP的比值过高,物流运行效率不高,基础设施不完善,运输环节衔接不顺畅等问题。而通过将各类传感装置、RFID技术、全球定位系统等信息传感设备与Internet结合,实现物品互联互通的物联网技术可对物流系统实时分析、精准执行,有效提升资源利用率以及物流效率,为我国物流行业的持续健康发展提供有力支撑。

关键词： 发动机   装配线:射频识别技术   应用  

摘要： 我国作为全球生产制造中心,需推进制造业信息化,适应愈发剧烈的市场竞争。发动机装配线是最终装配发动机的生产线,为保证零部件装配正确、数量准确、质量可靠,文章立足于射频识别技术,简单阐述了射频识别技术的原理与应用优势,以此为基础,从系统原理、硬件构成、软件组成、人机界面这几方面出发,提出发动机装配线上射频识别技术应用措施,从而为相关工作者提供参考。

关键词： 射频识别(RFID)   危废处置   层次分析  

摘要： 本研究以运行成本、运行效率、数据容量、信息安全、更新能力等五要素作为准则层,以纸质台账、一维条形码、二维条形码和RFID储存作为方案层,建立层次结构模型。通过分析确定危废处置系统高效运行的最优方案,相对优先排序为RFID储存(0.592 6)>二维条形码(0.154 8)>一维条形码(0.147 4)>纸质台账(0.105 1)。通过所选取的5类RFID电子标签感应距离测试,最小为3.67 m,最大为23.33 m,均至少可达到传统二维码读取距离(0.5~1.0 m)的3倍。RFID应用于危废处置系统,与传统的纸质台账、一维条形码、二维条形码等技术相比,具有比较明显的技术优势。

关键词： Radiofrequency identification   Modulation   Integrated circuits   Demodulation   ISO Standards   IEC Standards   Internet of Things   Fully integrated   multistandard   radio-frequency identification (RFID)   receiver and transmitter   System-on-a-Chip (SoC)  

摘要： The deployment and application of large-scale Internet of Things require a large number of 13.56-MHz radio-frequency identification (RFID) reader chips with lower cost. The existing RFID reader module needs to integrate multiple chips, such as microcontroller and high-frequency (HF) RFID reader IC on a single printed circuit board (PCB), which has the bottleneck of cost, power consumption, stability, and reliability. In order to adapt to the development trend of high integration, miniaturization, and low-power consumption of RFID reader, this article proposes a fully integrated low-cost RFID reader System-on-a-Chip (SoC), which integrates RF transceiver and analog circuit, baseband protocol processing, microcontroller, memory, and interface circuit into a single chip. The proposed reader IC supports communication protocols, such as ISO/IEC 14443 Type A and Type B, ISO/IEC 15693, and ISO/IEC 7816. The reader can communicate with contact and contactless IC cards. The modulation depth of the transmitter circuit ranges from 1% to 100%, and the maximum transmitting current is 126 mA. The receiver circuit is composed of I/Q clock generation, switched capacitor sampling circuit, variable gain amplifier (VGA) with filter, comparator, and pulse shaping circuit, which has good anti-noise performance. This 13.56-MHz RFID reader SoC is fabricated in a 180-nm CMOS process and is housed in a 64-pin QFP package. The total area is 8.75 mm(2), including 1.47 mm(2) for analog and RF circuits.

关键词： Radiofrequency identification   Sensors   Wireless sensor networks   Wireless communication   Delays   Couplers   Batteries   Batteryless   passive sensing   radio-frequency identification (RFID)   resistive sensing elements   RF sensor   six-port   wireless sensor   zero-power sensor  

摘要： In this article, a novel architecture for batteryless wireless sensors is proposed and demonstrated. The proposed architecture uses a six-port structure to integrate a UHF radio-frequency identification (RFID) chip with a resistive sensing element to enable the reading of environmental conditions wirelessly, without using a battery at the sensor node. The six-port structure divides an incoming RFID interrogator signal into an in-phase and quadrature branch and implements signal mixing without the use of a lossy or an active mixer. The amplitude and phase of the mixed signal are dependent on the value of the attached sensing element. By reading the phase of this signal at the reader, the value of the element can be easily determined using a noncoherent IQ demodulator. The design can easily integrate any type of resistive sensing element for parameters, such as temperature, humidity, and water level. A pin diode is used to control the amplitude and phase of the backscattered signal to demonstrate the performance. These values are successfully read at a distance of 2 m.

关键词： RFID   自动化   信息化   柔性化  

摘要： 汽车生产除了要求对生产信息进行追溯,还需要根据市场多样化需求进行高效率的可配置生产。传统的单纯依靠条码扫描及手动采集数据的方式无法满足生产需求。近年来,RFID作为一种非接触式的自动识别技术,有效实现信息传递功能,广泛应用于制造、物流等溯源领域。为了满足市场对于车辆配置多样化的需求,利用RFID技术应用于总装生产,以此为基础实现整车的全过程监控,包含车辆队列监控、产品信息可视化、设备程序自动选择、数据自动采集,最终实现总装车间的信息化和柔性生产。

关键词： 计量设备   RFID   设备管理  

摘要： RFID技术在现代企业生产管理中得到了广泛的应用,它是将无线电数字技术与现代识别技术结合在一起,大大提高企业对资产设备管理的效率,文章通过对RFID技术及其工作原理进行分析,探索了RFID技术在法定的计量检定机构中的计量设备、资产管理中的使用流程,分析了RFID技术在计量设备、资产管理中的优势,结合RFID的信息处理流程,从信息处理、数据存储等出发,对RFID技术在计量设备资产管理中的具体应用进行了深入的研究,为RFID在资产管理中的使用技巧提供借鉴与参考。