scholarly journals Simulating Wave Propagation Distribution Through GIS Integration

2021 ◽  
Vol 18 ◽  
pp. 82-90
Author(s):  
Luis Carlos Manrique ◽  
Anthony Weiss ◽  
Sandra Puentes
Keyword(s):  
Radio Frequency Identification ◽  
Location Estimation ◽  
Ultra Wideband ◽  
Spatial Constraints ◽  
Emergent Technologies ◽  
Budget Reduction ◽  
Frequency Identification ◽  
Reducing Costs ◽  
User Location ◽  
Selection Of

The use of electronic devices designed for user location estimation has become widely popular in the last decade. This is thanks to emergent technologies such as Bluetooth Low Energy, Radio-Frequency Identification, and Ultra-WideBand (UWB) among others. In the present study; the authors provide a method for using a Geographic Information System (GIS) to define spatial constraints, in order to simulate the lines of sight of anchors to make an informed selection of adequate locations for installation. By leveraging GIS, researchers or enterprises can improve the installation process by reducing costs while setting up arrangements that will ensure reliable data collection. We include a scenario illustrating the possibility of budget reduction of around 30% related to the orientation and survey of the devices.

Utilizing Modeling in a Reliability Study of ACA Joints in Humidity Tests

2013 ◽  
Vol 10 (1) ◽  
pp. 30-39 ◽  
Author(s):  
Kirsi Saarinen ◽  
Laura Frisk
Keyword(s):  
Radio Frequency Identification ◽  
Cost Savings ◽  
Experimental Tests ◽  
Shear Stresses ◽  
Cycling Test ◽  
Humidity Level ◽  
Anisotropic Conductive Adhesive ◽  
Frequency Identification ◽  
Identification Tags ◽  
Selection Of

Radio frequency identification tags (RFID) with anisotropic conductive adhesive (ACA) joints are used in various applications where the environmental conditions may impair their reliability. Thus the effects of different environmental stresses on reliability need to be investigated. The purpose of this work was to study whether a relatively simple shear stress model can be utilized in reliability prediction of anisotropically conductive paste (ACP) joints in an accelerated humidity test on the basis of the information obtained from another humidity test. If modeling gives accurate results when studying reliability, the need for actual testing would decrease and thereby time and cost savings could be achieved. In this study, finite element models were made to calculate shear stresses in ACP joints induced by two different humidity tests. Additionally, experimental tests were performed and the results were compared with those of modeling. The test samples were RFID tags whose microchips were attached with ACP. A constant humidity test was used to study the effects of high humidity level and a humidity cycling test was used to examine the effects of constantly varying humidity. In the modeling it was observed that the selection of the stress-free temperature has a significant effect on the results. With three different stress-free temperatures, three different sets of results were obtained. Although the tags saturated in the extreme conditions of the humidity cycling test, according to modeling, the change in relative humidity level in the humidity cycling test did not increase the harshness of the test. However, the temperature change in the humidity cycling test increased the harshness.

A framework for indoor construction resources tracking by applying wireless sensor networks1This paper is one of a selection of papers in this Special Issue on Construction Engineering and Management.

2012 ◽  
Vol 39 (9) ◽  
pp. 1083-1088 ◽  
Author(s):  
Xuesong Shen ◽  
Ming Lu
Keyword(s):  
Radio Frequency Identification ◽  
Cost Effective ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Mobile Nodes ◽  
Received Signal Strength Indicator ◽  
Construction Engineering ◽  
Global Positioning ◽  
Frequency Identification ◽  
Selection Of

The state-of-the-art tracking technologies, such as the global positioning system (GPS) and the radio frequency identification (RFID), lend themselves well to applications in relatively open areas, while falling short of accuracy and reliability in indoor or partially covered application settings due to signal blockage, distortion or deterioration. This research aims to address this challenge in construction engineering by exploring a cost-effective positioning methodology to realize automated and continuous tracking of construction resources. The emerging ZigBee-based wireless sensor networks (WSN) technology is introduced. A framework of WSN application is proposed for indoor construction resources tracking, which consists of a group of stationary and mobile sensor nodes that can communicate with one another. Real-time locations of the mobile nodes can be determined by applying the localization method based on received signal strength indicator (RSSI) and geometric trilateration.

scholarly journals Frequency-Coded Chipless RFID Tags: Notch Model, Detection, Angular Orientation, and Coverage Measurements

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 1843 ◽  
Author(s):  
Jahangir Alam ◽  
Maher Khaliel ◽  
Abdelfattah Fawky ◽  
Ahmed El-Awamry ◽  
Thomas Kaiser
Keyword(s):  
Cross Section ◽  
Radio Frequency Identification ◽  
Measurement Errors ◽  
Federal Communications Commission ◽  
Ultra Wideband ◽  
Mathematical Representation ◽  
Rfid Tags ◽  
Angular Orientation ◽  
Chipless Rfid ◽  
Frequency Identification

This paper focuses on the frequency coded chipless Radio Frequency Identification (RFID) wherein the tag’s information bits are physically encoded by the resonators’ notch position which has an effect on the frequency spectrum of the backscattered or retransmitted signal of the tag. In this regard, the notch analytical model is developed to consider the notch position and quality factor. Besides, the radar cross section (RCS) mathematical representation of the tag is introduced to consider the incident wave’s polarization and orientation angles. Hence, the influences of the incident wave’s orientation and polarization mismatches on the detection performance are quantified. After that, the tag measurement errors and limitations are comprehensively explained. Therefore, approaches to measureing RCS- and retransmission-based tags are introduced. Furthermore, the maximum reading range is theoretically calculated and practically verified considering the Federal Communications Commission (FCC) Ultra Wideband (UWB) regulations. In all simulations and experiments conducted, a mono-static configuration is considered, in which one antenna is utilized for transmission and reception.

Investigation on the chipless RFID tag with a UWB pulse using a UWB IR-based reader

2021 ◽  
pp. 1-10
Author(s):  
Kawther Mekki ◽  
Omrane Necibi ◽  
Hugo Dinis ◽  
Paulo Mendes ◽  
Ali Gharsallah
Keyword(s):  
Radio Frequency Identification ◽  
Ultra Wideband ◽  
Rfid Tag ◽  
Triangular Patch ◽  
Chipless Rfid ◽  
Frequency Domains ◽  
Measurement Results ◽  
Reader Antenna ◽  
Frequency Identification ◽  
Working Principle

Abstract In order to encrypt/encode data based on the magnitude level of the radar cross-section (RCS), we propose an approach with a precise estimation considering the resonant characteristics of a multipatch backscatter-based chipless radio frequency identification (RFID) dedicated for chipless tags depolarization. The working principle is based on the polarization mismatch between the tag and the reader antenna to control the magnitude of the backscatter, which allows a reliable detection in real environments. We introduce in this paper a new 4-bit chipless RFID tag with an enhanced RCS, based on a triangular patch antenna with multiple resonators. Additionally, we propose an ultra-wideband impulse radar (UWB-IR)-based reader that interrogates the chipless tag with a UWB pulse, and the received backscatter was studied in both time- and frequency-domains. The antenna was operating from 4.7 to 6.1 GHz, a band allocated for RFID systems. The obtained experimental measurement results in the environment of anechoic chamber were exceptionally relevant to validate the simulation results.

scholarly journals Measurement system for over-the-air evaluation of UHF RFID tags quality

2016 ◽  
Vol 4 (1) ◽  
pp. 33-41 ◽  
Author(s):  
Riccardo Colella ◽  
Luca Catarinucci ◽  
Luciano Tarricone
Keyword(s):  
Radio Frequency Identification ◽  
Cost Effective ◽  
Automatic Identification ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Wireless Power ◽  
Measurement Systems ◽  
Frequency Identification ◽  
Selection Of

Radio-frequency identification (RFID) technology is a consolidated example of wireless power transfer system in which passive electromagnetic labels called tags are able to harvest electromagnetic energy from the reader antennas, power-up their internal circuitry and provide the automatic identification of objects. Being fully passive, the performance of RFID tags is strongly dependent on the context, so that the selection of the most suitable tag for the specific application becomes a key point. In this work, a cost-effective but accurate system for the over-the-air electromagnetic characterization of assembled UHF RFID tags is firstly presented and then validated through comparison with a consolidated and diffused measurement systems. Moreover, challenging use-cases demonstrating the usefulness of the proposed systems in analyzing the electromagnetic performance of label-type tags also when applied on different material or embedded into concrete structures have been carried out.

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

2021 ◽  
pp. 73-80
Author(s):  
Nguyen Van Xuan ◽  
Hoang Tuan Long ◽  
Nguyen Thu Hong ◽  
Nguyen Gia Tuan Anh
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Ultra Wideband ◽  
Frequency Identification

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.

scholarly journals Assessing the Activity of Individual Group-Housed Broilers Throughout Life Using a Passive Radio Frequency Identification System—A Validation Study

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
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Tracking System ◽  
Later Life ◽  
Activity Level ◽  
Ultra Wideband ◽  
Individual Identification ◽  
Identification System ◽  
Rfid System ◽  
Frequency Identification

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.

LOCATION ESTIMATION OF MOBILE SYSTEMS USING PASSIVE RFID TAGS IN AN INDOOR ENVIRONMENT

2009 ◽  
Vol 20 (04) ◽  
pp. 619-632
Author(s):  
JAHNG HYON PARK ◽  
YONG-KWAN JI
Keyword(s):  
Radio Frequency Identification ◽  
Indoor Environment ◽  
Location Estimation ◽  
Mobile Systems ◽  
Estimation Methods ◽  
Rfid Tags ◽  
Mobile System ◽  
Rfid Tag ◽  
Frequency Identification ◽  
Passive Rfid

This paper presents methods of localization of mobile systems using recent Radio Frequency Identification (RFID) technology. We consider an indoor environment where RFID tags are implanted along the wall or in objects in the room. If the absolute position and orientation of a tag are read by an RF reader, a mobile system can estimate its location using the information saved in the tags. A reader-tag model is obtained through experiments in order to derive relative positions and orientations between an antenna and an RFID tag. To estimate the location, we propose two estimation methods. One uses a single RFID tag and the other uses multi-RFID tags. Experimental results show that the proposed methods can provide good performance for mobile system localization in an indoor environment.

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