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Articles 1 - 10 of 10
Full-Text Articles in Systems and Communications
Novel Passive Rfid Temperature Sensors Using Liquid Crystal Elastomers, Yousuf Shafiq
Novel Passive Rfid Temperature Sensors Using Liquid Crystal Elastomers, Yousuf Shafiq
FIU Electronic Theses and Dissertations
When transporting perishable foods in the Cold Supply Chain (CSC), it is essential that they are maintained in a controlled temperature environment (typically from -1° to 10°C) to minimize spoilage. Fresh-food products, such as, meats, fruits, and vegetables, experience discoloration and loss of nutrients when exposed to high-temperatures. Also, medicines, such as, insulin and vaccines, can lose potency if they are not maintained at the appropriate temperatures. Consequently, the CSC is critical to the growth of global trade and to the worldwide availability of food and health supplies; especially, when considering that the retail food market consists mostly (approximately 65%) …
Wireless Positioning And Tracking For Internet Of Things In Gps-Denied Environments, Bekir Sait Ciftler
Wireless Positioning And Tracking For Internet Of Things In Gps-Denied Environments, Bekir Sait Ciftler
FIU Electronic Theses and Dissertations
Wireless positioning and tracking have long been a critical technology for various applications such as indoor/outdoor navigation, surveillance, tracking of assets and employees, and guided tours, among others. Proliferation of Internet of Things (IoT) devices, the evolution of smart cities, and vulnerabilities of traditional localization technologies to cyber-attacks such as jamming and spoofing of GPS necessitate development of novel radio frequency (RF) localization and tracking technologies that are accurate, energy-efficient, robust, scalable, non-invasive and secure. The main challenges that are considered in this research work are obtaining fundamental limits of localization accuracy using received signal strength (RSS) information with directional …
Uhf Rfid Antenna Impedance Matching Techniques, Kamron Sockolov
Uhf Rfid Antenna Impedance Matching Techniques, Kamron Sockolov
Master's Theses
Radio Frequency Identification (RFID) systems use electromagnetic signals to wirelessly identify and track RFID-tagged objects. A reader transmits a carrier wave request signal to an RFID tag, which then transmits a unique identification signal back to the reader. Applications include supply chain inventory management, automated toll booth fee systems, sports event timing, restricted access control, pet monitoring and retail theft prevention. An RFID tag includes an antenna connected to a Radio Frequency Integrated Circuit (RFIC). RFID tags in the ultra-high frequency (UHF), industrial, scientific and medical (ISM) 902-928MHz band and global Electronic Product Code (EPC) 860‑960MHz band are powered passively …
Experimental Investigation Of Reading Passive Uhf Tags In A Multi-Tag Environment, Yi Zhou
Experimental Investigation Of Reading Passive Uhf Tags In A Multi-Tag Environment, Yi Zhou
Theses and Dissertations--Mechanical Engineering
Recently, the Internet of things (IoT) has emerged as a promising solution for several industrial applications. One of the key components in IoT is passive radio frequency identification (RFID) tags which do not require a power source for operations. Specifically, ultra-high frequency (UHF) tags are studied in this paper. However, due to factors such as tag-to-tag interference and inaccurate localization, RFID tags that are closely spaced together are difficult to detect and program accurately with unique identifiers. This thesis investigates several factors that affect the ability to encode a specific tag with unique information in the presence of other tags, …
Design And Development Of Smart Brain-Machine-Brain Interface (Sbmibi) For Deep Brain Stimulation And Other Biomedical Applications, Muhammad S. Khan
Design And Development Of Smart Brain-Machine-Brain Interface (Sbmibi) For Deep Brain Stimulation And Other Biomedical Applications, Muhammad S. Khan
FIU Electronic Theses and Dissertations
Machine collaboration with the biological body/brain by sending electrical information back and forth is one of the leading research areas in neuro-engineering during the twenty-first century. Hence, Brain-Machine-Brain Interface (BMBI) is a powerful tool for achieving such machine-brain/body collaboration. BMBI generally is a smart device (usually invasive) that can record, store, and analyze neural activities, and generate corresponding responses in the form of electrical pulses to stimulate specific brain regions. The Smart Brain-Machine-Brain-Interface (SBMBI) is a step forward with compared to the traditional BMBI by including smart functions, such as in-electrode local computing capabilities, and availability of cloud connectivity in …
Introduction To Anti-Collision Algorithms And Estimation Methods In Rfid Systems, Masoud Shakiba
Introduction To Anti-Collision Algorithms And Estimation Methods In Rfid Systems, Masoud Shakiba
Masoud Shakiba
The main objective of Radio Frequency Identification (RFID) systems is to provide fast identification for tagged objects. The noteworthy advantage of RFID technology, is its capability to identify objects simultaneously. However, when radio frequency signals are emitted simultaneously, there is a probability of collision occurrence, and thereby resulting in a waste of resources. Collision is a time-consuming event that reduces the performance of RFID systems. Consequently, several anti-collision algorithms have been proposed in the literature, attempt to decrease the collision occurrence probability. In almost all the existing anti-collision algorithms, a prior knowledge of the number of tags has a significant …
Structural Health Monitoring Inside Concrete And Grout Using The Wireless Identification And Sensing Platform (Wisp), Elicek Delgado Cepero
Structural Health Monitoring Inside Concrete And Grout Using The Wireless Identification And Sensing Platform (Wisp), Elicek Delgado Cepero
FIU Electronic Theses and Dissertations
This research investigates the implementation of battery-less RFID sensing platforms inside lossy media, such as, concrete and grout. Both concrete and novel grouts can be used for nuclear plant decommissioning as part of the U.S. Department of Energy’s (DOE’s) cleanup projects. Our research examines the following: (1) material characterization, (2) analytical modeling of transmission and propagation losses inside lossy media, (3) maximum operational range of RFID wireless sensors embedded inside concrete and grout, and (4) best positioning of antennas for achieving longer communication range between RFID antennas and wireless sensors. Our research uses the battery-less Wireless Identification and Sensing Platform …
Rfid Check-In System For Safe Routes To School At Hawthorne Elementary, Paul Banel
Rfid Check-In System For Safe Routes To School At Hawthorne Elementary, Paul Banel
Electrical Engineering
The system uses a low frequency Radio Frequency Identification (RFID) reader and passive RFID tags to help the Safe Routes to School program at Hawthorne Elementary in San Luis Obispo track the number of children who participate in the program. Children will carry passive RFID tags and scan them at the reader each morning that they walk or bike to school. The system tracks the total number of students that walk and bike each day, as well as the number of times each individual child participates over the course of many days. The Safe Routes program hopes to use this …
Rfid Modeling, Characterization, And Optimization, Joseph A. Cudrnak
Rfid Modeling, Characterization, And Optimization, Joseph A. Cudrnak
Electrical Engineering
Passive RFID tags may be used to transmit a message to a reader. This technology is useful for many applications, including inventory systems. However, due to electromagnetic cancellation on conductive surfaces, the reader cannot detect RFID tags placed directly on conductive objects. Using tag characterization in an RF anechoic chamber and modeling in HFSS, three types of Omni ID tags were characterized and a design was proposed to maximize signal power delivered to the reader.
Implementation Of Collaborative Rf Localization Using A Software-Defined Radio Network, Augustine A. Honore
Implementation Of Collaborative Rf Localization Using A Software-Defined Radio Network, Augustine A. Honore
Theses and Dissertations
This thesis investigates the use of collaboration between sensor nodes that were tasked with localizing a radio frequency emitter. Localization is a necessary component for dynamic spectrum access. Using a set of software-defined radios as our sensors and a received signal strength-based maximum likelihood localization algorithm, we successfully localized transmitting nodes based on their received signal strength. Our experiment was conducted outdoors using a flexible topology that could be shaped into 21 sub-topologies that varied in size, and orientation with respect to the transmitters. This was made possible through application of a time shift concept and a post-processing technique. We …