scholarly journals Kỹ thuật RFID chủ động 125Khz và ứng dụng xác thực trong không gian hẹp

Author(s):  
Nguyen Van Xuan ◽  
Hoang Tuan Long ◽  
Nguyen Thu Hong ◽  
Nguyen Gia Tuan Anh

Trong bài báo này, tác giả trình bày về công nghệ RFID (Radio Frequency Identification Radio) chủ động ở dải tần số LF 125kHz và ứng dụng trong việc nhận dạng, xác thực ở khoảng cách hẹp từ 1-3m. Nội dung phần 1 giới thiệu căn bản về công nghệ RFID, sự giống và khác nhau về mặt kỹ thuật của RFID thụ động và chủ động, ưu nhược điểm của mỗi loại. Trong phần 2, bài toán nhận dạng và xác thực trong khoảng cách hẹp được đặt ra, cụ thể là ứng dụng nhận dạng chủ phương tiện khi ở gần xe, các giải pháp dùng RFID hiện tại đang có. Phần 3, tác giả xây dựng mô hình RFID chủ động để giải quyết bài toán trên. Tác giả cũng đề xuất kỹ thuật sử dụng OTP và mã hóa dữ liệu để chống giả mạo xác thực. Chi tiết phần cứng, mô hình thuật toán mã hóa OTP và dữ liệu được miêu tả trong phần 4. Phần 5 là kết quả thực nghiệm bao gồm dữ liệu khoảng cách nhận dạng thực tế 2,2m với RFID chủ động, ước tính thời gian sử dụng khoảng 3,5 năm nếu dùng pin coin CR2023 đối với hệ thống RFID chủ động dùng chíp nhận dạng AS3933. Kỹ thuật chống xác thực giả mạo mà bài báo đề xuất có thể áp dụng trên các thiết bị UWB (Ultra Wideband) mà đang trở thành xu thế trong ứng dụng nhận dạng thông minh hiện nay.

Sensors ◽  
2020 ◽  
Vol 20 (13) ◽  
pp. 3612
Author(s):  
Malou van der Sluis ◽  
Yvette de Haas ◽  
Britt de Klerk ◽  
T. Bas Rodenburg ◽  
Esther D. Ellen

Individual data are valuable for assessing the health, welfare and performance of broilers. In particular, data on the first few days of life are needed to study the predictive value of traits recorded early in life for later life performance. However, broilers are generally kept in groups, which hampers individual identification and monitoring of animals. Sensor technologies may aid in identifying and monitoring individual animals. In this study, a passive radio frequency identification (RFID) system was implemented to record broiler activity, in combination with traditional video recordings. The two main objectives were (1) to validate the output of the RFID system by comparing it to the recorded locations on video, and (2) to assess whether the number of antennas visited per unit time could serve as a measure of activity, by comparing it to the distance recorded on video and to the distance moved as recorded using a validated ultra-wideband (UWB) tracking system. The locations recorded by the RFID system exactly matched the video in 62.5% of the cases, and in 99.2% of the cases when allowing for a deviation of one antenna grid cell. There were moderately strong Spearman rank correlations between the distance recorded with the RFID system and the distance recorded from video (rs = 0.82) and between UWB and RFID (rs = 0.70) in approximately one-hour recordings, indicating that the RFID system can adequately track relative individual broiler activity, i.e., the activity level of a broiler in comparison to its group members. As the RFID tags are small and lightweight, the RFID system is well suited for monitoring the individual activity of group-housed broilers throughout life.


2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Khaled Issa ◽  
Muhammad A. Ashraf ◽  
Mohammed R. AlShareef ◽  
Hatim Behairy ◽  
Saleh Alshebeili ◽  
...  

A novel compact dual-polarized-spectral-signature-based chipless radio-frequency identification (RFID) tag is presented. Specifically, an L-shape resonator-based structure is optimized to have different spectral signatures in both horizontal and vertical polarizations, in order to double the encoding capacity. Resonators’ slot width and the space between closely placed resonators are also optimized to enhance the mutual coupling, thereby helping in achieving high-data encoding density. The proposed RFID tag operates over 5 GHz to 10 GHz frequency band. As a proof of concept, three different 18-bit dual-polarized RFID tags are simulated, fabricated, and tested in an anechoic chamber environment. The measurement data show reasonable agreement with the simulation results, with respect to resonators’ frequency positions, null depth, and their bandwidth over the operational spectrum.


2014 ◽  
Vol 513-517 ◽  
pp. 3414-3418 ◽  
Author(s):  
Yuwono Rudy ◽  
Dwi A. Wahyu ◽  
Fauzan Edy P. Muhammad

This paper discusses concerning design of circular patch microstrip antenna for Radio Frequency Identification (RFID) tags application in microwave band. Circular microstrip antenna is designed with an egg slot on the ground plane and feed line to get ultra wideband. The design of microstrip antenna using Phenolic White Paper-FR2 with dielectric constant (or) =4.5. Based on simulation results, the antenna shows it works at frequency 2128-4807 MHz with gain of-17,398 dBi. The rectangular stub, caused the decreasing of bandwidth but the gain increase. By adding a rectangular stub on the ground plane, antenna works at frequency 1166 3475 MHz with increasing gain of-2,733 dBi.


2021 ◽  
Vol 4 (3) ◽  
Author(s):  
Anastasiia V. Baidiuk

This article contains description of methods to prevent the spread of coronavirus using modern technologies. Businesses face significant challenges in complying with social distancing guidelines, and they do not have a real understanding of whether these guidelines are followed in their facilities. Many companies use Radio Frequency Identification (RFID) technology to ensure the safety of employees by tracking the proximity or location of each. Kinexon's SafeZone and Triax Proximity Trace are effective solutions to prevent the spread of coronavirus within the enterprise. SafeZone is a unique and powerful active RFID technology, the purpose of which is formation of a warning about the convergence and tracking of contacts in case of a positive test result for COVID-19. The solution consists of  UWB labels, worn by employees, as well as cloud software to manage the collected data. Contact information allows companies to take steps to create a safe and healthy work environment. The SafeZone solution uses ultra-wideband (UWB) radio frequency tags. UWB uses the frequency bands 3.25 - 4.75 GHz and 6.25 - 6.75 GHz, which do not overlap with the bands of wireless networks (WLAN) and ISM. RTLS (Real-Time Locating Systems) - an automated system that provides identification, accumulation, processing and storage of information about the location and movement of people, objects, mobile machinery and vehicles to monitor technological and business processes, signaling, as well as for retrospective analysis of certain processes and situations. All RTLS systems consist of several main components: tags, readers and software for interpreting data. Use of active UWB tags in these systems allows to achieve high speeds at a distance of up to 10 m, the technology allows you to reach 110 Mbps. UWB module - a desktop device for setting up and accounting for UWB Tag devices. UWB hub - a device capable of performing thousands of scan scans per second at a distance of up to 30 cm. UWB Sensor - a device that detects pulses emitted by UWB tags and provides the exchange of operational information about resources. UWB reader is an access control device that uses the patented technology of short-pulse ultra-wideband (UWB) signals. UWB-tag - a device that can be attached to objects or clothing of personnel to track and track their location at any time in real time with incredible accuracy. Triax Proximity Trace technology provides active feedback, in the form of visual and audible signal, so people understand when they have violated the proper social distance. Due to Triax Proximity Trace it is possible to determine the degree of contact of employees with those who received a positive test, for example, according to the CDC classification. Components of the system: labels, gateways that are deployed in strategic places, cloud software and information panel for managing proximity event data. Triax Proximity Trace uses tags that operate at 900 MHz. Due to SafeZone and Triax Proximity Trace solutions the company can have a complete picture of potential patients and send for testing real contacts.


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