A dynamic data driven indoor localisation framework based on ultra high frequency passive RFID system

2020 ◽  
Vol 34 (3) ◽  
pp. 172
Author(s):  
Sara Masoud ◽  
Young Jun Son ◽  
Russell Tronstad ◽  
Chieri Kubota ◽  
Bijoy Dripta Barua Chowdhury
Keyword(s):  
High Frequency ◽  
Data Driven ◽  
Dynamic Data ◽  
Ultra High Frequency ◽  
Rfid System ◽  
Passive Rfid ◽  
Indoor Localisation

A dynamic data driven indoor localisation framework based on ultra high frequency passive RFID system

2020 ◽  
Vol 34 (3) ◽  
pp. 172
Author(s):  
Bijoy Dripta Barua Chowdhury ◽  
Sara Masoud ◽  
Young Jun Son ◽  
Chieri Kubota ◽  
Russell Tronstad
Keyword(s):  
High Frequency ◽  
Data Driven ◽  
Dynamic Data ◽  
Ultra High Frequency ◽  
Rfid System ◽  
Passive Rfid ◽  
Indoor Localisation

Passive Ultra High Frequency RFID sensor with reference tag for crack detection of aluminum alloy structure

2021 ◽  
Vol 16 (11) ◽  
pp. P11018
Author(s):  
P. Wang ◽  
L. Dong ◽  
H. Wang ◽  
G. Li ◽  
X. Xie
Keyword(s):  
Aluminum Alloy ◽  
High Frequency ◽  
Crack Detection ◽  
Crack Depth ◽  
Low Frequency ◽  
Reliable Operation ◽  
Channel Changes ◽  
Ultra High Frequency ◽  
Passive Rfid ◽  
Reading Distance

Abstract It can be ensured safe and reliable operation of a metallic structure by monitoring the positions which are easy to crack. Because the channel changes with the environment, a tag sensor in the ultra high frequency (UHF) is vulnerable to interference. This paper aims to investigate the reliability of passive RFID sensor systems with a reference tag for crack detection of aluminum alloy structures when the condition of reading distance and surrounding environment changes. The impedance and gain of tags are simulated, which provides theoretical basis for experimental analysis. With an increase of crack depth, the impedance of the sensor tag shifts to the low frequency direction, and the reference tag changes slightly. When dual tags are placed orthogonally, the gain of the sensor tag changes greatly, which means that it is more sensitive to crack depth. The backscatter power of the sensor tag shows a decline trend, and the power of the reference tag remains unchanged. The sensor features a linear response with the variation of crack depth. The sensitivity of crack characterization is better when dual tags are placed orthogonally.

Energy Efficient Physical Layer Design for Passive RFID System

2009 ◽  
Vol 32 (7) ◽  
pp. 1356-1364 ◽  
Author(s):  
Hong-Gang WANG ◽  
Chang-Xing PEI ◽  
Yun-Hui YI
Keyword(s):  
Energy Efficient ◽  
Physical Layer ◽  
Rfid System ◽  
Passive Rfid

A Broadband High-Gain Bi-Layer Log-Periodic Dipole Array (LPDA) for Ultra High Frequency (UHF) Conformal Load Bearing Antenna Structures (CLAS) Applications

2014 ◽  
Author(s):  
Nicholas A. Bishop ◽  
Mohammod Ali ◽  
Jason Miller ◽  
David L. Zeppettella ◽  
William Baron ◽  
...  
Keyword(s):  
High Frequency ◽  
High Gain ◽  
Load Bearing ◽  
Ultra High Frequency

Ultra-High-Frequency Pairs Trading in Gold ETFs

2017 ◽  
Author(s):  
Thong Dao ◽  
Frank McGroarty ◽  
Andrew Urquhart
Keyword(s):  
High Frequency ◽  
Pairs Trading ◽  
Ultra High Frequency

MODELING AND EXPERIMENTAL VERIFICATION OF AIR-THERMAL AND MICROWAVE-CONVECTIVE PRESOWING SEED TREATMENT

2020 ◽  
Vol 4 (41) ◽  
pp. 35-43
Author(s):  
ALEKSEY A. VASIL’EV ◽  
◽  
ALEKSEY N. VASIL’EV ◽  
DMITRIY BUDNIKOV ◽  
ANTON SHARKO
Keyword(s):  
High Frequency ◽  
Seed Treatment ◽  
Field Experiments ◽  
Research Purpose ◽  
Dense Layer ◽  
Technological Equipment ◽  
External Influence ◽  
Ultra High Frequency ◽  
Grain Processing ◽  
Seed Processing

The use of electrophysical influences for pre-sowing treatment of seeds is an effective way to increase their sowing quality. The use of these methods is limited by the fact that their implementation requires new technological equipment in grain processing lines. This problem is solved more easily when pre-sowing processing is performed using installations for active ventilation and grain drying. (Research purpose) The research purpose is in determining the possibility of using active ventilation units and ultra-high-frequency convective grain dryers for pre-sowing grain processing and to evaluating the effectiveness of such processing using computer modeling. (Materials and methods) It is necessary to ensure the uniformity of processing with external influence the seeds placed in a dense layer. Authors carried out pre-sowing treatment of seeds on real installations. Treated seeds were sown in experimental plots and the results of treatment were evaluated. (Results and discussion) The article presents graphs of changes in grain temperature and humidity during processing. To check the feasibility of pre-sowing treatment, authors performed modeling of air-heat and ultra-high-frequency convective seed treatment processes. Based on the results of field experiments, air-heat treatment stimulates the development of secondary plant roots, contributes to an intensive increase in the green mass of plants; ultra-high-frequency convective seed treatment allows increasing the number of productive stems in plants, the number of ears in one plant. (Conclusions) Technological equipment designed for drying and active ventilation of grain can be effectively used for pre-sowing seed processing. In the course of field experiments, it was revealed the possibility of controlling the structure of the crop using different types of external influence on seeds during their pre-sowing processing.

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