UHF RFID Temperature Sensor Assisted With Body-Heat Dissipation Energy Harvesting

Jauregi, Inigo; Solar, Héctor; Beriain, Andoni; Zalbide, Ibon; Jimenez-Irastorza, A.; Inaki, Galarraga; Berenguer, Roc

doi:10.1109/jsen.2016.2638473

Cited by 29 publications

(26 citation statements)

References 17 publications

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“…In this context, sensor nodes play an essential role to monitor what is happening in and/or around the smart thing. From the point of view of the power system, a sensor node (with sensing elements, read-out electronics, a digital processor, and a transceiver [1]) is usually seen as a light load since its current consumption is low, for instance: units or tens of mA when the node is awake and a few µA when asleep. The power processing circuit of a sensor node generally relies on either a buck [2] or a boost [3] switching dc/dc converter, which is placed between the energy source (e.g.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Optimization in Burst-Mode Buck DC/DC Converters for Sensor Nodes

2018

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In autonomous sensor nodes, switching dc/dc converters are usually employed to power the sensor electronics and also to maintain the operating voltage of an energy transducer around its maximum power point. In such a context, this paper optimizes the power efficiency of buck dc/dc converters when operating in burst mode, which is preferable than the conventional pulse-width modulation technique in lowpower sensor applications. The optimization is carried out by selecting an optimal inductor current to efficiently transfer the energy from the input to the output during the burst. Such optimization is applied when regulating the converter's output voltage, which corresponds to the supply voltage of the sensor electronics, and also the input voltage, which corresponds to the operating voltage of the energy transducer that is here a photovoltaic module. The theoretical analysis and the experimental results reported herein prove the existence of such an optimal inductor current in both scenarios. Experimental tests with a commercial buck dc/dc converter (TPS62750) show that the use of this optimal inductor current provides up to 9% increase in efficiency, thus prolonging the operating lifetime of the sensor node.

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Section: Introductionmentioning

confidence: 99%

Efficiency Optimization in Burst-Mode Buck DC/DC Converters for Sensor Nodes

2018

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“…Nevertheless, high energy demand generated by additional functional units and thereby the need to use an electrochemical power sources is so troublesome that they have not yet gained significant importance on the commercial market. The options of harvesting energy from the environment (Figure 4b) are described, in many literature considerations where light radiation [52], thermal radiation [53] or mechanical vibration [54] sources are mainly mentioned. The output power in these types of supply units [55] is large enough for permanently providing the modern digital systems with energy.…”

Section: Autonomous Rfid Sensormentioning

confidence: 99%

Factors Affecting the Synthesis of Autonomous Sensors with RFID Interface

Węglarski

Jankowski-Mihułowicz

2019

Sensors

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A general view on the problem of designing atypical battery-free, autonomous semi-passive RFID transponders-sensors (autonomous sensors with RFID interfaces) is presented in this review. Although RFID devices can be created in any of the electronic technologies, the design stage must be repeated each time when the manufacturing processes are changed, and their specific conditions have to be taken into consideration when modeling new solutions. Aspects related to the factors affecting the synthesis of semi-passive RFID transponder components on the basis of which the idea of the autonomous RFID sensor was developed are reflected in the paper. Besides their general characteristics, the operation conditions of modern RFID systems and achievements in autonomous RFID sensor technology are revealed in subsequent sections—they include such issues as technological aspects of the synthesis process, designing antennas for RFID transponders, determining RFID chip and antenna parameters, creating the interrogation zone IZ, etc. It should be pointed that the universal construction of an autonomous RFID sensor, which could be use in any application of the automatic object identification system, cannot be developed according to the current state of the art. Moreover, a trial and error method is the most commonly used in the today’s process of designing new solutions, and the basic parameters are estimated on the basis of the tests and the research team experience. Therefore, it is necessary to look for new inventions and methods in order to improve implementations of RFID systems.

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“…Given that commodity radio frequency identification (R-FID) tags are already widely used in a number of applications for good tracking and management [11,14,26,29,32,35,36], RFID is a good choice for temperature sensing due to its compelling features of being low-cost, small-sized, and battery-free [10,24,25,27,30,33]. RFID-based temperature sensing generally falls into two categories.…”

Section: Introductionmentioning

confidence: 99%

“…RFID-based temperature sensing generally falls into two categories. The first is to combine a tag with a traditional temperature sensor, in which the sensor is in charge of temperature measurement and the tag is responsible for data transmission over the air [5,6,10,24,25,27,30]. Although the sensor-augmented tag is feasible, adding an extra temperature sensor does not reduce the cost.…”

Section: Introductionmentioning

confidence: 99%

Thermotag

Chen

Liu

Xiao

et al. 2021

Proceedings of the 19th Annual International Conference on Mobile Systems, Applications, and Services

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Temperature sensing plays a significant role in upholding quality assurance and meeting regulatory compliance in a wide variety of applications, such as fire safety and cold chain monitoring. However, existing temperature measurement devices are bulky, cost-prohibitive, or battery-powered, making item-level sensing and intelligence costly. In this paper, we present a novel tag-based thermometer called Thermotag, which uses a common passive RFID tag to sense the temperature with competitive advantages of being low-cost, batteryfree, and robust to environmental conditions. The basic idea of Thermotag is that the resistance of a semiconductor diode in a tag's chip is temperature-sensitive. By measuring the discharging period through the reverse-polarized diode, we can estimate the temperature indirectly. We propose a standardscompliant measurement scheme of the discharging period by using a tag's volatile memory and build a mapping model between the discharging period and temperature for accurate and reliable temperature sensing. We implement Thermotag using a commercial off-the-shelf RFID system, with no need for any firmware or hardware modifications. Extensive experiments show that the temperature measurement has a large span ranging from 0 • C to 85 • C and a mean error of 2.7 • C.

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UHF RFID Temperature Sensor Assisted With Body-Heat Dissipation Energy Harvesting

Cited by 29 publications

References 17 publications

Efficiency Optimization in Burst-Mode Buck DC/DC Converters for Sensor Nodes

Efficiency Optimization in Burst-Mode Buck DC/DC Converters for Sensor Nodes

Factors Affecting the Synthesis of Autonomous Sensors with RFID Interface

Thermotag

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