Present State-of-the-Art of Transmission Line Icing

Pohlman, Joe C.; Landers, Phillip G.

doi:10.1109/mper.1982.5519725

Cited by 2 publications

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“…Moreover, these results will contribute to improve the design of new types of ultrasonic sensors, better adapted to cylindrical surfaces and capable of measuring the distribution of cold precipitations on a surface. Les méthodes actuelles de déglaçage des conducteurs utilisées par la plupart des compagnies sont des méthodes thermiques qui utilisent l'effet Joule produit par la circulation de courant continu ou encore alternatif dans certains cas [Polhman et Landers, 1982] et [Manitoba Hydro, 1993]. L'avantage de ces méthodes est qu'elles utilisent l'énergie disponible sur le réseau afin de déglacer de longues portions de lignes.…”

Section: Mise En Garde/adviceunclassified

Contribution au développement d'un capteur ultrasonique pour mesurer l'épaisseur de la glace /

Ghalmi¹

2006

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Section: Mise En Garde/adviceunclassified

Contribution au développement d'un capteur ultrasonique pour mesurer l'épaisseur de la glace /

Ghalmi¹

2006

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Spiral passive electromagnetic sensor (SPES) for smart sensing and de-icing

Iervolino

Meo

2015

SPIE Proceedings

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The objective of this work was to develop a wireless Spiral Passive Electromagnetic Sensor (SPES) to monitor the complex permittivity of a surrounding medium. The sensor is a self-resonating planar pattern of electrically conductive material. Investigation were conducted to demonstrate the capability of the SPES to monitor humidity and temperature gradients, and acting as an ice protection tool. An oscillating signal is used to interrogate remotely the sensor with a single loop antenna or wiring it directly to a spectrum analyser and monitoring the backscattering signal. The excited sensor responds with its own resonant frequency, amplitude and bandwidth that can be correlated to physical quantities to be monitored. Our studies showed the capability of the sensor to monitor temperature and humidity changes in composite materials and uniformly produce induction heating when the conductive path is activated by an external electric power supply that can be used for deicing of aircraft structures.Downloaded From: http://proceedings.spiedigitallibrary.org/ on 08/28/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx INTRODUCTIONFor many years engineers have been searching for ways to obtain information on how structure is behaving in service by incorporating, at the time of construction or subsequently, sensing devices which can provide information about their health such as strain, temperature, humidity, and the presence of defects (e.g. crack, delamination, porosity, etc.). In the recent years structures and infrastructures tend to contain more integrated sensors in order to collect data on its health and/or on different environmental parameters [1,2]. Moisture is one of the largest concerns for building since it is the single most important agent of building deterioration [3]. Moreover the control of relative humidity and temperature is essential for improving the aircraft cabin air quality [4]. Whereas nowadays temperature measurements can be performed with a satisfactory accuracy, measurement of humidity results much more complex [5,6]. The highest percentage of the current humidity sensors are based on the capacitive technique, have the feature of ease fabrication, low power requirement and linear response [7,8]. Nowadays, with the steady increase of the use of composite materials in the aerospace industry, a significant amount of work has been conducted for the development of non-destructive inspection as well as for structural health monitoring system [9,10]. Furthermore, for an effective monitoring of flaws within the structure a large number of sensors distributed over a large area are required. The presence of multiple sensors on the same structure require the use of complex algorithm for the analysis of the data [11,12]. Most of the sensors actually used for monitoring humidity, temperature or for SHM system are single-functional elements. This require the use of a sensor network were different device are integrated. The health of structures could be strongly affected also by the presence o...

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Present State-of-the-Art of Transmission Line Icing

Cited by 2 publications

References 0 publications

Contribution au développement d'un capteur ultrasonique pour mesurer l'épaisseur de la glace /

Contribution au développement d'un capteur ultrasonique pour mesurer l'épaisseur de la glace /

Spiral passive electromagnetic sensor (SPES) for smart sensing and de-icing

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