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The aim of this work is to study the feasibility of using the modulated frequency selective surface (FSS) as a semi-passive tag for body sensing applications at 2.45 GHz ISM band. Two prototypes are presented: a breathing sensor and a skin thermometer. The breathing sensor measures the change of the airflow temperature that is produced during respiration. The core of this sensor is a negative temperature...
Chipless radio frequency identification provides a huge potential for applications with extreme environmental conditions. The low data capacities and the printability on film or paper, prevent the use of state-of-the-art realizations in scenarios with extreme temperature. Hence, we introduce a novel chipless RFID tag that overcomes these problems. Due to a polarimetric and image base data encoding,...
A wireless monitoring system, which operates autonomously for up to several years, is discussed. Measurement techniques for temperature and humidity, acceleration and strain are reviewed. Data transmission is carried out by RFID and Bluetooth radio interfaces. The operation algorithm of the wireless monitoring system is reported.
In this paper, a novel hybrid time-frequency modulation scheme for the integration of chipless wireless identifications and sensors is presented. This approach combines the wide bandwidth of localizable time domain reflectometry RFID tags and the narrow-band characteristic of high-Q resonator-based transducers for the design of a transducer-integrated TDR-RFID tag where both identification and sensing...
Temperature monitoring of medicines is essential for product quality and patient safety. Product quality is influenced by temperature perturbations and time delays in interventions. Thanks to Internet of Things (IoT) considerable progress has been made in recent years in the improvement of temperature monitoring devices. However, temperature monitoring in medicine Cold Chain remains challenging. In...
In this paper, we present the design, fabrication and calibration of a passive UHF RFID tag based soil moisture and environment temperature sensor. The inter-digital double-sided capacitive sensor developed modifies its capacitance as the soil moisture changes, due to modification of the soil permittivity. The implemented smart tag includes an external sensor front-end that is capable to process analog...
In this paper, the performances of several tire temperature and pressure sensors in Tire Pressure Monitoring System (TPMS) were analyzed, and the corresponding IC and MEMS core technology in R&D of the active and passive sensors was studied. It is pointed out that the passive wireless sensor chips based on the surface acoustic wave (SAW) is the development direction in automotive safety products...
To meet severe aeronautic environment constraints, we propose in this paper a versatile 794μW autonomous multi-power-source wireless sensor system interfacing with aeronautic-grade resistive bridge transducers and operating over a wide range of −40°C to +180°C in 180nm HT SOI technology. Compared to previously reported works, it provides robust and versatile 8Sps-1kSps sensor interface and RFID/micro...
The proliferation of connected devices, wherein Sensors, Actuators and Tags (such as Radio-Frequency Identification (RFID)) are able to seamlessly communicate to their environment and to each other for sharing information or to perform some actions has created the Internet of Things (IoT) ecosystem. These devices expose their functionality via standard services and application programming interfaces...
This paper describes development of flexible RFID smart tag for temperature monitoring. The system is based on a single chip solution working at 13.56 MHz according to ISO 15693. This standard is supported by Android API and Android smartphones with NFC periphery. The developed prototype of the smart tag was realized by hybrid technology combining printed RFID antenna with the SMD chip and flexible...
Recent advances in low-cost natural user interfaces such as Microsoft Kinect and Leap Motion controller allow the Virtual Reality implementation of 3D serious games for, posture, upper limb and lower limb rehabilitation purposes. However, it is very important to compare the results obtained by the users that train in virtual and real environments. This paper presents a virtual reality serious game...
We study NaCl-water solutions as the temperature sensitive material for chipless RFID-based temperature threshold sensing, detecting and storing the event if a given threshold temperature is surpassed. Different solution concentrations are evaluated simultaneously with a sensor that can detect multiple temperature thresholds. A new method for background interference subtraction is presented, which...
The present study investigates meteorological factors that affect the phase of RFID passive tags at 868 MHz, in outdoor conditions. The study identifies the effect of the water on the antennas, the temperature of the cables and tags, the moisture of the tag support, and the atmospheric conditions. These effects could lead to over 8 radians phase drift, over a year in a typical environment. That leads...
Body temperature is among most important biometric indicators that are normally checked in both domestic and hospital environments. The way to collect such parameter could be dramatically improved thanks to the Epidermal Electronics technology enabling plaster-like devices suitable to on-skin temperature sensing and capable of wireless communication with an electromagnetic reading module. The practical...
The Internet of Things (IoT) is the interconnection of varied devices which when integrated with sensors and software enables the end user to collect and interchange data. In today's world, the usage of IoT allows us to connect and control remote t infrastructures, thus creating more avenues for integration of the physical and virtual world which then results in better and more accurate systems and...
This contribution addresses the electromagnetic feasibility of a wireless temperature monitoring inside a portion of a high-power high-frequency Cyclotron Auto-Resonance Maser (CARM) for plasma heating in the new generation of DEMO TOKAMAK machines. The scenario is investigated as potential communication channel for a UHF RFID sensor network where a cavity probe is used to both excite the coaxial...
In this paper a portative device for the ambient temperature and air humidity controlling is described. The source of power for the developed device is a general-purpose battery and an original energy harvester. The ambient parameters values are transmitted to a personal computer through radio-frequency identification (RFID) connection. Described device is also applicable as a wireless link which...
Internet of Things (IoT) can be thought of as the next big step in internet technology. It is enabled by the latest developments in communication technologies and internet protocols. This paper surveys IoT in respect of layer architecture, enabling technologies, related protocols and challenges.
The application of NFC for medical data collection is introduced in this research in order to reduce the process of vital signs measurement including heart rate, blood pressure and body temperature. By deploying a smartphone, all measured signals and records can be collected automatically via RFID chip from patient's beds. The proposed system is controlled from the smartphone through Android SDK by...
The goal of this paper is to present a scenario that optimizes a passive RFID data transmission without changing its standard. This procedure is based on the inventory process defined by the EPC Gen 2 protocol. An application of this procedure will be presented through a wireless temperature sensor concept and an ASIC implementation.
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