As a kind of brand-new technology, radio frequency identification management, data control and acquisition. This paper introduced food safety system construction, analyzed the advantages and problems in dairy modem su...As a kind of brand-new technology, radio frequency identification management, data control and acquisition. This paper introduced food safety system construction, analyzed the advantages and problems in dairy modem suggestions for solution according to the practical situation. (RFID) plays an important role in dairy information tracing and culture function extension of managing breeding technology, and finally put forward some展开更多
A compact antenna formed by three concentric split rings for ultra-high frequency(UHF)radio frequency identification(RFID)tag is proposed in this paper.The antenna is composed of two parts,an outer short-circuited rin...A compact antenna formed by three concentric split rings for ultra-high frequency(UHF)radio frequency identification(RFID)tag is proposed in this paper.The antenna is composed of two parts,an outer short-circuited ring modified from a traditional split-ring resonator(SRR)antenna and an inner SRR load,so the antenna can be regarded as a short-circuited ring loaded with SRR.According to the transmission line theory,to conjugate match with the capacitive input-impedance of a tag chip,the length of the short-circuited ring isλg/4 shorter than that of an open-circuited dipole of a traditional SRR antenna,whereλg is the wavelengh of the operating frequency.Hence,the size of the proposed antenna is more compact than that of the traditional SRR antenna.Thereafter,the proposed antenna is simulated and optimized by ANSYS high-frequency structure simulator(HFSS).The impedance,efficiency,and mutual coupling of the fabricated antenna are tested in a reverberation chamber(RC).The results show that the size of the presented antenna is 83%smaller than that of the traditional SRR antenna and the proposed antenna can cover the whole UHF RFID operating frequency band worldwide(840—960 MHz).The measured read range of the tag exhibits maximum values of 45 cm in free space and 37 cm under dense tag environment.展开更多
In order to construct a resource-saving and environment- friendly society, the advantages of radio frequency identification (RFID) were considered. And it put forward the idea of introducing RFID in the recycling ac...In order to construct a resource-saving and environment- friendly society, the advantages of radio frequency identification (RFID) were considered. And it put forward the idea of introducing RFID in the recycling activities of waste products. Taking into account such elements as the technical level of RFID, cost saving from remanufacturing and the cost of RFID tags, both centralized and decentralized supply chain models with different participants in waste product collection were created, in order to determine the optimal pricing strategy and RFID technical level. In the end, sensitivity analyses were conducted to analyze the impacts of scaling parameter for additional increased recovery rate with RFED on pricing and RFID technology level, and impacts of cost saving on the profits of participants in different remanufacturing closed-loop supply chain models.展开更多
In a passive ultra-high frequency(UHF)radio frequency identification(RFID)system,the recovery of collided tag signals on a physical layer can enhance identification efficiency.However,frequency drift is very common in...In a passive ultra-high frequency(UHF)radio frequency identification(RFID)system,the recovery of collided tag signals on a physical layer can enhance identification efficiency.However,frequency drift is very common in UHF RFID systems,and will have an influence on the recovery on the physical layer.To address the problem of recovery with the frequency drift,this paper adopts a radial basis function(RBF)network to separate the collision signals,and decode the signals via FM0 to recovery collided RFID tags.Numerical results show that the method in this paper has better performance of symbol error rate(SER)and separation efficiency compared to conventional methods when frequency drift occurs.展开更多
Dynamic framed slotted Aloha algorithm is one of popular passive radio frequency identification(RFID) tag anticollision algorithms. In the algorithm, a frame length requires dynamical adjustment to achieve higher iden...Dynamic framed slotted Aloha algorithm is one of popular passive radio frequency identification(RFID) tag anticollision algorithms. In the algorithm, a frame length requires dynamical adjustment to achieve higher identification efficiency.Generally, the adjustment of the frame length is not only related to the number of tags, but also to the occurrence probability of capture effect. Existing algorithms could estimate both the number of tags and the probability of capture effect. Under large-scale RFID tag identification, however, the number of tags would be much larger than an initial frame length. In this scenario, the existing algorithm's estimation errors would substantially increase. In this paper, we propose a novel algorithm called capture-aware Bayesian estimate, which adopts Bayesian rules to accurately estimate the number and the probability simultaneously. From numerical results, the proposed algorithm adapts well to the large-scale RFID tag identification. It has lower estimation errors than the existing algorithms. Further,the identification efficiency from the proposed estimate is also higher than the existing algorithms.展开更多
In this paper a new active RFID system at 2.45 GHz based on the low-power system-on-chip CC2530 RF transceiver is designed and implemented. Only by using of an integrated multi-channel fast chip, both the MCU and RF o...In this paper a new active RFID system at 2.45 GHz based on the low-power system-on-chip CC2530 RF transceiver is designed and implemented. Only by using of an integrated multi-channel fast chip, both the MCU and RF operations are done which makes the RFID more reliable and reduces the complexity of the hardware and cost, vividly. This RFID system utilizes the Zig-Bee IEEE 802.15.4 standard in the ISM band. A lot amount of energy is restored by setting Tags in the sleep mode in the most of times. The maximum transmission range of 80 m at the output power of 4.5 dBm is obtained. The main application of this system is for the container identification with precise operation and high accuracy. An active Tag with unique ID is mounted on each vehicle. By enabling the AUTOCRC error detection possibility, minor errors are detected in the received frames. Receiver sensitivity of –97 dBm and current consumption of 1 μA in the sleep mode and 29.6 mA in the active mode are reported.展开更多
射频识别(Radio Frequency Identification,RFID)技术利用电磁场自动识别和跟踪附着在物体上的标签。该技术分为被动RFID和主动RFID,前者不含电池,通过读取器提供的电磁波激活,后者则含有电池,能主动发送信号。基于此,深入探讨RFID技术...射频识别(Radio Frequency Identification,RFID)技术利用电磁场自动识别和跟踪附着在物体上的标签。该技术分为被动RFID和主动RFID,前者不含电池,通过读取器提供的电磁波激活,后者则含有电池,能主动发送信号。基于此,深入探讨RFID技术在广播电台数字音频系统中的应用,包括音频跟踪、管理及自动化,并通过具体案例分析展示其优化广播运作流程的潜力。展开更多
室内定位有多种方案,如蓝牙到达角度(Angle of Arrival,AOA)、Wi-Fi、接收信号强度指示(Received Signal Strength Indication,RSSI)及超宽带(Ultra Wide Band,UWB)等。在多目标定位、低成本、低功耗场景下,超高频无源射频识别(Radio Fr...室内定位有多种方案,如蓝牙到达角度(Angle of Arrival,AOA)、Wi-Fi、接收信号强度指示(Received Signal Strength Indication,RSSI)及超宽带(Ultra Wide Band,UWB)等。在多目标定位、低成本、低功耗场景下,超高频无源射频识别(Radio Frequency Identification,RFID)具有显著优势。为实现室内多物品快速定位,将超高频无源RFID技术与相控阵技术相融合,建立一套室内定位系统。展开更多
射频识别(Radio Frequency Identification,RFID)技术作为一种无线通信技术,通过无线电波实现数据的自动识别和跟踪,已广泛应用于商品管理、供应链管理以及门禁控制等领域。随着技术的普及和应用范围的扩大,如何借助RFID技术提升通信数...射频识别(Radio Frequency Identification,RFID)技术作为一种无线通信技术,通过无线电波实现数据的自动识别和跟踪,已广泛应用于商品管理、供应链管理以及门禁控制等领域。随着技术的普及和应用范围的扩大,如何借助RFID技术提升通信数据传输的安全性,防止数据泄露、篡改或非法访问,已成为一个急需解决的问题。文章主要介绍RFID技术的基本原理和不同类型的RFID系统,明确通信数据安全传输的基本要求,包括数据的完整性、机密性以及安全认证等方面。深入探讨RFID技术在通信数据安全传输中的具体应用,包括RFID系统的安全架构设计、加密算法的选择与应用以及认证过程与协议制定,通过采取相应的安全措施,有效提升RFID系统在数据传输过程中的安全性。展开更多
为提升光伏电站变压器的运行可靠性,文章提出一种基于射频识别(Radio Frequency Identification,RFID)技术的故障检测系统。该系统通过集成RFID标签与多种传感器,实时监测变压器的温度、振动及油质等状态参数,并利用改进的支持向量机(Su...为提升光伏电站变压器的运行可靠性,文章提出一种基于射频识别(Radio Frequency Identification,RFID)技术的故障检测系统。该系统通过集成RFID标签与多种传感器,实时监测变压器的温度、振动及油质等状态参数,并利用改进的支持向量机(Support Vector Machine,SVM)模型进行故障检测。实验结果表明,相较于基于传统反向传播(Back Propagation,BP)神经网络模型的故障检测系统,该系统能更准确、高效地识别变压器潜在故障,为光伏电站的安全稳定运行提供了有力的技术支持。展开更多
为促进能源向清洁低碳化转型,实现“双碳”目标,国家大力推进智能电网建设,在电力行业中应用了多种新兴技术,其中射频识别(Radio Frequency Identification,RFID)技术凭借高稳定性和高效率受到重视。简要介绍RFID技术的原理和组成,并结...为促进能源向清洁低碳化转型,实现“双碳”目标,国家大力推进智能电网建设,在电力行业中应用了多种新兴技术,其中射频识别(Radio Frequency Identification,RFID)技术凭借高稳定性和高效率受到重视。简要介绍RFID技术的原理和组成,并结合电网建设的管理现状,深入探讨和分析RFID技术在电网建设中的应用,为后续的研究提供理论基础。展开更多
随着物联网、人工智能等技术的飞速发展,基于物联网的“人-机-物”智能感知识别技术成为当前研究的热点方向。在众多的感知识别技术中,射频识别技术(Radio Frequency Identification, RFID)作为物联网的核心技术之一,被广泛应用在物流...随着物联网、人工智能等技术的飞速发展,基于物联网的“人-机-物”智能感知识别技术成为当前研究的热点方向。在众多的感知识别技术中,射频识别技术(Radio Frequency Identification, RFID)作为物联网的核心技术之一,被广泛应用在物流追踪、身份认证和室内定位等各个领域。由于目前广泛使用的个人移动设备并不支持RFID信息读取,限制了RFID技术的大范围应用。针对智能手机不能直接读取RFID标签信息的问题,提出一种利用用户预定义的基于RFID反射信号的手势特征实现面向智能手机和RFID标签之间的跨域互联方法。该方法不需要对部署的RFID系统或智能手机进行任何硬件修改,通过用户在感兴趣标签面前做出手势而产生的RFID相位特征,并与智能手机捕获到的运动传感器数据的相关时间戳进行匹配,从而实现了智能手机与RFID标签的关联配对。最后,通过实验验证了文中提出的跨域互联方法的可行性。展开更多
设计一种基于射频识别(Radio Frequency Identification,RFID)技术的图书馆自助服务系统,以提高图书馆的运作效率和用户体验,实现图书借阅、归还和定位等功能的自动化处理。采用RFID技术作为核心技术,通过将RFID标签粘贴在每本图书上,...设计一种基于射频识别(Radio Frequency Identification,RFID)技术的图书馆自助服务系统,以提高图书馆的运作效率和用户体验,实现图书借阅、归还和定位等功能的自动化处理。采用RFID技术作为核心技术,通过将RFID标签粘贴在每本图书上,并在图书馆各个关键位置安装RFID读写器,实现对图书的无线识别和追踪。经过实际测试和数据分析得出,基于RFID技术的图书馆自助服务系统能够大幅提升图书馆的运作效率和用户体验,自助借阅和归还的速度更快,减少了等待时间。展开更多
基金Supported by the Project of the National "948" (2006-Z12)
文摘As a kind of brand-new technology, radio frequency identification management, data control and acquisition. This paper introduced food safety system construction, analyzed the advantages and problems in dairy modem suggestions for solution according to the practical situation. (RFID) plays an important role in dairy information tracing and culture function extension of managing breeding technology, and finally put forward some
文摘A compact antenna formed by three concentric split rings for ultra-high frequency(UHF)radio frequency identification(RFID)tag is proposed in this paper.The antenna is composed of two parts,an outer short-circuited ring modified from a traditional split-ring resonator(SRR)antenna and an inner SRR load,so the antenna can be regarded as a short-circuited ring loaded with SRR.According to the transmission line theory,to conjugate match with the capacitive input-impedance of a tag chip,the length of the short-circuited ring isλg/4 shorter than that of an open-circuited dipole of a traditional SRR antenna,whereλg is the wavelengh of the operating frequency.Hence,the size of the proposed antenna is more compact than that of the traditional SRR antenna.Thereafter,the proposed antenna is simulated and optimized by ANSYS high-frequency structure simulator(HFSS).The impedance,efficiency,and mutual coupling of the fabricated antenna are tested in a reverberation chamber(RC).The results show that the size of the presented antenna is 83%smaller than that of the traditional SRR antenna and the proposed antenna can cover the whole UHF RFID operating frequency band worldwide(840—960 MHz).The measured read range of the tag exhibits maximum values of 45 cm in free space and 37 cm under dense tag environment.
基金National Natural Science Foundation of China(No.71301038)
文摘In order to construct a resource-saving and environment- friendly society, the advantages of radio frequency identification (RFID) were considered. And it put forward the idea of introducing RFID in the recycling activities of waste products. Taking into account such elements as the technical level of RFID, cost saving from remanufacturing and the cost of RFID tags, both centralized and decentralized supply chain models with different participants in waste product collection were created, in order to determine the optimal pricing strategy and RFID technical level. In the end, sensitivity analyses were conducted to analyze the impacts of scaling parameter for additional increased recovery rate with RFED on pricing and RFID technology level, and impacts of cost saving on the profits of participants in different remanufacturing closed-loop supply chain models.
基金supported by the National Natural Science Foundation of China(61762093)the 17th Batches of Young and Middle-aged Leaders in Academic and Technical Reserved Talents Project of Yunnan Province(2014HB019)+1 种基金the Key Applied and Basic Research Foundation of Yunnan Province(2018FA036)the Program for Innovative Research Team(in Science and Technology)in University of Yunnan Province。
文摘In a passive ultra-high frequency(UHF)radio frequency identification(RFID)system,the recovery of collided tag signals on a physical layer can enhance identification efficiency.However,frequency drift is very common in UHF RFID systems,and will have an influence on the recovery on the physical layer.To address the problem of recovery with the frequency drift,this paper adopts a radial basis function(RBF)network to separate the collision signals,and decode the signals via FM0 to recovery collided RFID tags.Numerical results show that the method in this paper has better performance of symbol error rate(SER)and separation efficiency compared to conventional methods when frequency drift occurs.
基金supported in part by the National Natural Science Foundation of China(61762093)the 17th Batch of Young and Middle-aged Leaders in Academic and Technical Reserved Talents Project of Yunnan Province(2014HB019)the Program for Innovative Research Team(in Science and Technology)in University of Yunnan Province
文摘Dynamic framed slotted Aloha algorithm is one of popular passive radio frequency identification(RFID) tag anticollision algorithms. In the algorithm, a frame length requires dynamical adjustment to achieve higher identification efficiency.Generally, the adjustment of the frame length is not only related to the number of tags, but also to the occurrence probability of capture effect. Existing algorithms could estimate both the number of tags and the probability of capture effect. Under large-scale RFID tag identification, however, the number of tags would be much larger than an initial frame length. In this scenario, the existing algorithm's estimation errors would substantially increase. In this paper, we propose a novel algorithm called capture-aware Bayesian estimate, which adopts Bayesian rules to accurately estimate the number and the probability simultaneously. From numerical results, the proposed algorithm adapts well to the large-scale RFID tag identification. It has lower estimation errors than the existing algorithms. Further,the identification efficiency from the proposed estimate is also higher than the existing algorithms.
文摘In this paper a new active RFID system at 2.45 GHz based on the low-power system-on-chip CC2530 RF transceiver is designed and implemented. Only by using of an integrated multi-channel fast chip, both the MCU and RF operations are done which makes the RFID more reliable and reduces the complexity of the hardware and cost, vividly. This RFID system utilizes the Zig-Bee IEEE 802.15.4 standard in the ISM band. A lot amount of energy is restored by setting Tags in the sleep mode in the most of times. The maximum transmission range of 80 m at the output power of 4.5 dBm is obtained. The main application of this system is for the container identification with precise operation and high accuracy. An active Tag with unique ID is mounted on each vehicle. By enabling the AUTOCRC error detection possibility, minor errors are detected in the received frames. Receiver sensitivity of –97 dBm and current consumption of 1 μA in the sleep mode and 29.6 mA in the active mode are reported.
文摘射频识别(Radio Frequency Identification,RFID)技术利用电磁场自动识别和跟踪附着在物体上的标签。该技术分为被动RFID和主动RFID,前者不含电池,通过读取器提供的电磁波激活,后者则含有电池,能主动发送信号。基于此,深入探讨RFID技术在广播电台数字音频系统中的应用,包括音频跟踪、管理及自动化,并通过具体案例分析展示其优化广播运作流程的潜力。
文摘室内定位有多种方案,如蓝牙到达角度(Angle of Arrival,AOA)、Wi-Fi、接收信号强度指示(Received Signal Strength Indication,RSSI)及超宽带(Ultra Wide Band,UWB)等。在多目标定位、低成本、低功耗场景下,超高频无源射频识别(Radio Frequency Identification,RFID)具有显著优势。为实现室内多物品快速定位,将超高频无源RFID技术与相控阵技术相融合,建立一套室内定位系统。
文摘射频识别(Radio Frequency Identification,RFID)技术作为一种无线通信技术,通过无线电波实现数据的自动识别和跟踪,已广泛应用于商品管理、供应链管理以及门禁控制等领域。随着技术的普及和应用范围的扩大,如何借助RFID技术提升通信数据传输的安全性,防止数据泄露、篡改或非法访问,已成为一个急需解决的问题。文章主要介绍RFID技术的基本原理和不同类型的RFID系统,明确通信数据安全传输的基本要求,包括数据的完整性、机密性以及安全认证等方面。深入探讨RFID技术在通信数据安全传输中的具体应用,包括RFID系统的安全架构设计、加密算法的选择与应用以及认证过程与协议制定,通过采取相应的安全措施,有效提升RFID系统在数据传输过程中的安全性。
文摘为促进能源向清洁低碳化转型,实现“双碳”目标,国家大力推进智能电网建设,在电力行业中应用了多种新兴技术,其中射频识别(Radio Frequency Identification,RFID)技术凭借高稳定性和高效率受到重视。简要介绍RFID技术的原理和组成,并结合电网建设的管理现状,深入探讨和分析RFID技术在电网建设中的应用,为后续的研究提供理论基础。
文摘随着物联网、人工智能等技术的飞速发展,基于物联网的“人-机-物”智能感知识别技术成为当前研究的热点方向。在众多的感知识别技术中,射频识别技术(Radio Frequency Identification, RFID)作为物联网的核心技术之一,被广泛应用在物流追踪、身份认证和室内定位等各个领域。由于目前广泛使用的个人移动设备并不支持RFID信息读取,限制了RFID技术的大范围应用。针对智能手机不能直接读取RFID标签信息的问题,提出一种利用用户预定义的基于RFID反射信号的手势特征实现面向智能手机和RFID标签之间的跨域互联方法。该方法不需要对部署的RFID系统或智能手机进行任何硬件修改,通过用户在感兴趣标签面前做出手势而产生的RFID相位特征,并与智能手机捕获到的运动传感器数据的相关时间戳进行匹配,从而实现了智能手机与RFID标签的关联配对。最后,通过实验验证了文中提出的跨域互联方法的可行性。
文摘设计一种基于射频识别(Radio Frequency Identification,RFID)技术的图书馆自助服务系统,以提高图书馆的运作效率和用户体验,实现图书借阅、归还和定位等功能的自动化处理。采用RFID技术作为核心技术,通过将RFID标签粘贴在每本图书上,并在图书馆各个关键位置安装RFID读写器,实现对图书的无线识别和追踪。经过实际测试和数据分析得出,基于RFID技术的图书馆自助服务系统能够大幅提升图书馆的运作效率和用户体验,自助借阅和归还的速度更快,减少了等待时间。