Wireless overhead line temperature sensor based on RF cavity resonance

Ghafourian, Maryam; Bridges, Greg E.; Nezhad, Abolghasem Zeidaabadi; Thomson, D. J.

doi:10.1088/0964-1726/22/7/075010

Cited by 10 publications

(4 citation statements)

References 13 publications

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“…The strength of the antenna backscattering depends on the impedance of the antenna termination load. Therefore, by connecting the antenna to a temperature sensitive load, such as a microwave resonator [10], [14], a CMOS temperature sensor [15], [16], or a resistor [12], the temperature information can be encoded in the antenna backscattering and thus can be acquired wirelessly. The temperature sensitive load (the temperature sensor) can either be a low-power active component powered by energy harvested from the interrogation RF signal [13] or a passive component.…”

Section: Introductionmentioning

confidence: 99%

Microstrip Patch Antenna Temperature Sensor

2015

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The resonant frequencies of a microstrip patch antenna are dependent on the dielectric constant of its substrate and the physical dimensions of its radiation patch. Both of these parameters are temperature-dependent. In this paper, we investigated the effects of temperature on the antenna resonant frequencies for the purpose of studying the microstrip patch antenna as a temperature sensor. First, the relationship between the antenna resonant frequency shift and the temperature change is derived based on the transmission line model. To validate the theoretical prediction, antenna sensors bonded on different metal bases were tested in a temperature chamber. By comparing the measured temperature-frequency relationship with the theoretical predictions, we discovered that the dielectric constant of the substrate is not only dependent on temperature but also influenced by the base material. After calibrating the thermal coefficient of the substrate dielectric constant using the measurement data, the differences between the measurements and the theoretical predictions were within the expected systematic error of the reference thermocouple, validating that a microstrip patch antenna can serve as a temperature sensor.

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Section: Introductionmentioning

confidence: 99%

Microstrip Patch Antenna Temperature Sensor

2015

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“…The second system is a stick-on sensor [88].  The Isfahan University of Technology and the University of Manitoba have developed a device that measures temperature based on radio frequency cavity resonance [89]. Table 7 shows some experiences during the last years developed by different companies and institutions in some countries, aiming to estimate the ampacity based on meteorological parameters and the conductor temperature.…”

Section: Conductor Temperature Current Intensity Tilt Angle Sag Powermentioning

confidence: 99%

Review of dynamic line rating systems for wind power integration

Fernández

Albizu

Bedialauneta

et al. 2016

Renewable and Sustainable Energy Reviews

121

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When a wind power system is connected to a network point there is a limit of power generation based on the characteristics of the network and the loads connected to it. Traditionally, transmission line limits are estimated conservatively assuming unfavourable weather conditions (high ambient temperature, full sun and low wind speed). However, the transmission capacity of an overhead line increases when wind speed is high, due to the cooling caused by wind in the distribution lines. Dynamic line rating (DLR) systems allow monitoring real weather conditions and calculating the real capacity of lines. Thus, when planning wind power integration, if dynamic line limits are considered instead of the conservative and static limits, estimated capacity increases. This article reviews all technologies developed for real-time monitoring during the last thirty years, as well as some case studies around the world, and brings out the benefits and technical limitations of employing dynamic line rating on overhead lines. Further, the use of these DLR systems in wind integration is reviewed.

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“…factor of the sensor is influenced by temperature-dependent losses, mainly including the metal resistivity and dielectric loss, which can be reflected by a resonance bandwidth. To characterize the value of the sensor changed with the temperature, is approximately defined with bandwidth of the resonance by [20,21] = 0 Δ ,…”

Section: Temperature Responsesmentioning

confidence: 99%

Wireless Passive Temperature Sensor Realized on Multilayer HTCC Tapes for Harsh Environment

et al. 2015

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A wireless passive temperature sensor is designed on the basis of a resonant circuit, fabricated on multilayer high temperature cofired ceramic (HTCC) tapes, and measured with an antenna in the wireless coupling way. Alumina ceramic used as the substrate of the sensor is fabricated by lamination and sintering techniques, and the passive resonant circuit composed of a planar spiral inductor and a parallel plate capacitor is printed and formed on the substrate by screen-printing and postfiring processes. Since the permittivity of the ceramic becomes higher as temperature rises, the resonant frequency of the sensor decreases due to the increasing capacitance of the circuit. Measurements on the input impedance versus the resonant frequency of the sensor are achieved based on the principle, and discussions are made according to the exacted relative permittivity of the ceramic and quality factor (Q) of the sensor within the temperature range from 19°C (room temperature) to 900°C. The results show that the sensor demonstrates good high-temperature characteristics and wide temperature range. The average sensitivity of the sensor with good repeatability and reliability is up to 5.22 KHz/°C. It can be applied to detect high temperature in harsh environment.

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Wireless overhead line temperature sensor based on RF cavity resonance

Cited by 10 publications

References 13 publications

Microstrip Patch Antenna Temperature Sensor

Microstrip Patch Antenna Temperature Sensor

Review of dynamic line rating systems for wind power integration

Wireless Passive Temperature Sensor Realized on Multilayer HTCC Tapes for Harsh Environment

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