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关键词： RFID技术   供应链   编码处理  

摘要： 阐述RFID技术在电力工程供应链物资配送管理过程中的应用特点,包括支持实现RFID标签与条形码标签的信息转换过程、RFID标签的编码处理、信息技术系统需要遵循的输入标准。

关键词： Three-dimensional displays   Chipless RFID   Fingerprint recognition   Three-dimensional printing   Radiofrequency identification   Encoding   Shape   Additive manufacturing   chipless RFID   dielectric resonator   radio frequency identification (RFID)   square cavity  

摘要： A novel methodology for designing Chipless Radio Frequency Identification (RFID) tags realized using the Additive Manufacturing technologies and exhibiting a high number of identification states is proposed and investigated. An encoding scheme based on the resonances and anti-resonances of the input impedance of the resonator is employed for identifying the tag, which is achieved by exploiting the set of zero-crossing points of the tag reactance. A tolerance analysis is also performed to avoid any ambiguity in the reading process and to minimize the redundancy, thus providing unique electromagnetic signatures which are also suitable for anti-counterfeiting applications. Several prototypes have been fabricated and tested to assess the practical implementation of the proposed encoding scheme.

关键词： group writing   RFID   Backscatter   group writing   RFID  

摘要： Efficient and secure group writing plays a crucial role in RFID-enabled multi-task backscatter systems. The prior works lay emphasis on the time efficiency of the group data transmission, but neglect its security. This paper is devoted to providing anonymous group writing. We propose the Overlapped Bloom Filter-based protocol (OBF) and its enhanced version (OBF+). The core is to construct an approximately random sequence as a noise by making transmission data for different tag groups overlap with each other, thus hiding the original information with a low computational complexity. The compact filter can guarantee the time efficiency while improving the security of the group writing. To make tags aware of the correctness of the decoded group data, the OBF+ introduces the complementary code-based check mechanism to eliminate the fault data. We prototype the system with USRP and programmable WISP tags, and conduct extensive simulations to evaluate our approaches in terms of the time efficiency, the accuracy, and the anonymity of the data transmission.

关键词： RFID   Cross-protocol Communication   Localization  

摘要： Radio Frequency Identification (RFID) is widely recognized for its cost-effectiveness, energy efficiency, and ease of manufacturing, promising versatile applications such as material recognition, vibration detection, and localization. However, these inherent lightweight characteristics necessitate extensive computations or tailored devices for specific tasks. Consequently, there is a critical imperative to explore and augment the sensing and communication capabilities of standard RFIDs to better accommodate a broader spectrum of Internet of Things (IoT) services. In this paper, we introduce SENSO, a self-enhancement solution designed to facilitate diverse tasks without the need for hardware modifications or additional device support. Our approach introduces two key innovations to enable cross-protocol communication (RFID-LoRa) and localization. Firstly, we seamlessly integrate Chirp Spread Spectrum (CSS) modulation into RFID, enabling simultaneous communication with commercial tags and LoRa devices. Secondly, we realize the transmission of wider-band chirps to activate and localize the tag concurrently. By harnessing these techniques, we developed a prototype while addressing several challenges. Our evaluation demonstrates that when maintaining the fundamental RFID communication, SENSO can effectively deliver additional messages to LoRa devices across various indoor scenarios, e.g., through multiple floors, rooms, and corners, and extending over outdoor distances spanning kilometers. Furthermore, it achieves an average accuracy of approximately 5 to 10 centimeters in tag ranging and localization.

关键词： RFID   wireless sensing   robotics  

摘要： We in this paper present TiSee, an RFID-based sensing system that supports miniature robots to perform agile tasks in everyday environments. TiSee's unique capability is that it uses a single arbitrarily-deployed antenna to locate a target with sub-cm-level accuracy and identify its orientation to within few degrees. Compared with existing solutions which rely on either antenna arrays or multiple RFID readers, TiSee is cheap, compact, and applicable to miniature robots. The idea of TiSee is to stick an RFID tag on the robot (or its gripper) and use it as a moving "antenna" to locate the tags on the target. The core of this design is a novel technique which can build a "channel" between two commercial RFID tags. Such an inter-tag channel is proved to be highly sensitive to the change in intertag distance and is resistant to multipath. By leveraging this channel and the mobility of the robot, we emulate an antenna array and use it for fine-grained localization and orientation estimation. Our experiments show that TiSee achieves a median accuracy of 9.5mm and 3.1. in 3D localization and orientation estimation. TiSee brings an eye-in-hand "camera" to miniature robots, supporting them to perform agile tasks in dark, cluttered, and occluded settings.

关键词： real estate   space management   retail   POS data   RFID data   big data   trade and service company   retail transactions  

摘要： In today's business landscape, the volume of transaction data is rapidly increasing. This study explores the integration of Point of Sale (POS) and Radio-Frequency Identification (RFID) technologies to enhance the analysis of customer transactions using big data tools. By leveraging these technologies, businesses can extract valuable insights to improve processes, optimize inventory, and boost customer satisfaction. The research employs an object-subject management approach, which facilitates real-time decision-making by merging retail transactions of the clients with their movement patterns. An experiment involving around 7000 customers demonstrates the effective collection and processing of POS and RFID data, highlighting the benefits of integrating these data streams. Key metrics, such as time spent in different store sections, provide deeper insights into consumer behavior. The findings reveal the potential of these technologies to transform retail services, offering opportunities for demand forecasting, risk management, and personalized customer experiences. The study concludes that merging POS and RFID data opens new avenues for developing management solutions aimed at enhancing customer engagement and the operational efficiency of the retailer. Future research will focus on further elaborating these solutions to maximize the benefits of integrated data analysis.

关键词： Resonant frequency   Encoding   Mutual coupling   Radiofrequency identification   Optimization   Design methodology   Semiconductor device measurement   Particle swarm optimization   Codes   Antenna measurements   Chipless radio frequency identification (RFID)   particle swarm optimization (PSO)   radar cross section (RCS)   Taguchi method (TM)  

摘要： Frequency-coded chipless radio frequency identification (RFID) tag design frequently suffers from the mutual coupling effect among resonant components, which causes the frequency shifting phenomenon. It is very difficult to thoroughly resolve this problem because of design requirements, such as high capacity and limited space on a single tag. In this letter, a novel design method based on particle swarm optimization (PSO) in combination with empirical Taguchi method (TM) is proposed. With this methodology, the optimal design parameters are automatically searched and fitted to comply with the resonance requirements at the given encoding frequencies. The proposed method was demonstrated with the design process of an I-shaped slot tag structure.

关键词： RFID   Gas sensor   Ethyl alcohol   Carbon dioxide  

摘要： This article proposes and designs a passive RFID integrated dual parameter gas sensor that can respond to ethanol and carbon dioxide gases at room temperature. Firstly, nanocomposite sensitive materials were prepared by hydrothermal method, and their microstructure and elemental composition were analyzed through TEM, SEM, XRD, XPS and UPS characterization tests. The dual frequency gas sensing antenna was designed and optimized using HFSS software, and a high-precision engraving mechanism was used to prepare the sensor model. Finally, two different gas sensitive materials were deposited on the corresponding positions of the symmetric structure of the sensing antenna, and the different gas concentration changes were converted into amplitude and frequency changes at different frequency points of the sensing antenna. The test results showed that the sensor operates within the range of carbon dioxide concentration of 600 ppm-1600 ppm, with an amplitude change of 10.3 dB and a sensitivity of 0.009 dB/ppm. The sensitivity of the sensor is 0.29 MHz/ppm when operating stably within the ethanol concentration range of 200 ppm-2800 ppm. Compared with traditional gas sensors, passive RFID dual parameter gas sensors have the advantages of selective response to carbon dioxide and ethanol gases in mixed gas environments, fast response speed, strong anti-interference to interfering gases, and strong temperature adaptability. It has a good application prospect transportation, agricultural greenhouses, and food testing.

关键词： tag optimization feature set   tail code recognition mechanism   anti-collision   quick identification   RFID  

摘要： Radio Frequency Identification (RFID) is crucial for the Internet of Things, with a key challenge being the efficient prevention of tag collisions for quick identification. This paper presents a novel approach for rapid tag recognition in small to medium-sized warehouses, combining a tag optimization feature set with a tail code recognition mechanism. To minimize the frequency of scanning for duplicate tags and reduce the occurrence of collisions, we construct an optimization feature set based on the reader's position. This set helps in assessing the likelihood of tag repetition through its linear variation. It also incorporates a tail code mechanism that recognizes only the last 22 digits of the tag's EPC code, significantly speeding up identification. The tail code length is dynamically adjusted based on the number of tags to maintain uniqueness. Simulation results indicate that our approach significantly reduces the identification of duplicate tags and minimizes the instances of collisions.