Thermistors
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Caracterização de termistores automotivos do tipo NTC
RESUMO Os termistores automotivos são eletrocerâmicas com características sensoras alojadas em estojos metálicos fixadas no radiador, que têm como função controlar a temperatura da água de resfriamento do motor. O objetivo deste trabalho foi caracterizar dois termistores comerciais aplicados em veículos automotores. Os termistores caracterizados for
Matéria (Rio J.). Publicado em: 25/11/2019
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2. Analysis of Thermo-Mechanical Stress in Fiber Bragg Grating Used for Hydro-Generator Rotor Temperature Monitoring
Abstract Fiber Bragg gratings (FBGs) offer new possibilities to monitor accurately the rotor temperature. Dozens of sensors can be mounted in series in a single fiber and used to measure the temperature in several points of the rotor winding. Such sensors installed directly on the rotor winding surface are thermally isolated from the cooling air by a silicon
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-04
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3. Thermal Control Design Conception of the Amazonia-1 Satellite
ABSTRACT: Amazonia-1 is a Brazilian remote sensing satellite providing mainly images, in order to observe and monitor deforestation, especially in the Amazon region. This paper describes the thermal control design, which uses passive and active concepts. The active thermal control is based on heaters regulated by software via thermistors. The passive thermal
J. Aerosp. Technol. Manag.. Publicado em: 2014-06
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4. Desenvolvimento de dispositivos bolométricos para detecção de radiação infravermelha distante = : Development of bolometric devices for far-infrared radiation detection / Development of bolometric devices for far-infrared radiation detection
This work has as a main goal the fabrication and characterization of thermal sensors, described as bolometrics, which are dedicated to detection of far infrared radiation. These sensors are fabricated using microfabrication techniques and the thin films are selectives to wet etching. These mechanical microstructures are formed on silicon wafers using a surfa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/07/2012
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5. Síntese e caracterização elétrica de materiais com comportamento termistor à base de óxidos de manganês, de níquel e de cobalto / Synthesis and electrical characterization of ceramic thermistors based on manganese, nickel and cobalt oxides
Materiais cerâmicos à base de óxidos de manganês, de níquel e de cobalto foram preparados por meio de mistura de óxidos seguida de homogeneização e sinterização controlada em 1250 °C. Os óxidos foram caracterizados por meio das técnicas de difração de raios X, fluorescência de raios X, termogravimetria e determinação de distribuição de ta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/12/2007
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6. GENERAL USES AND METHODS OF THERMISTORS IN TEMPERATURE INVESTIGATIONS, WITH SPECIAL REFERENCE TO A TECHNIQUE FOR HIGH SENSITIVITY CONTACT TEMPERATURE MEASUREMENT1
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7. TEMPERATURE-GRADIENT INCUBATOR FOR DETERMINING THE TEMPERATURE RANGE OF GROWTH OF MICROORGANISMS
Elliott, R. Paul (U.S. Department of Agriculture, Albany, Calif.). Temperature-gradient incubator for determining the temperature range of growth of microorganisms. J. Bacteriol. 85:889–894. 1963.—The temperature-gradient incubator consists of an aluminum bar with troughs for media, with controlled temperatures at each end, and with insulation to prevent
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8. Pure-tone birdsong by resonance filtering of harmonic overtones
Pure-tone song is a common and widespread phenomenon in birds. The mechanistic origin of this type of phonation has been the subject of long-standing discussion. Currently, there are three hypotheses. (i) A vibrating valve in the avian vocal organ, the syrinx, generates a multifrequency harmonic source sound, which is filtered to a pure tone by a vocal
National Academy of Sciences.