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Theoretical and Experimental Studies on Mechanical Structures Loads Induced by Wind. Application on Parabolic Dish Antenna
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First results of the USP integrated sound probe application to the 3D vibration measurements on parabolic surface antenna
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Received: 29.03.2013 In this paper it is present a non contact method for 3D Accepted: 16.04.2013 measurements on parabolic surface antenna. In order to obtain modal parameters and modal shapes of a parabolic surface antenna a Keywords: Vibration Microflown USP (Ultimate Sound Probe) is used. Microflown sensors are measurements, parabolic antenna, close to antenna and can be used for the non contact measurement of the sensors. normal component of the structural velocity. 1.Introduction One of the difficult problems at vibration measurement for lightweight structures, such as the reflector parabolic antenna, is that by placing a seismic accelerometer on a structure it is appear a structural change with deviations of frequency and modal shapes of that structure. Possible solutions to remove this inconvenience are related to the use of micro seismic accelerometers very lightweight, few tens of grams, or use of optics, in particular those with lasers and possibility of the scan of the entire structures. In both cases equipment are expensive, especially those with laser scanning. 2. The principle of Microflown Sensors The basic principle of Microflown sensors is the same as the hot wire anemometer. The wire heated to a temperature of between 200°C and 400°C changes its
Annals of West University of Timisoara - Physics – de Gruyter
Published: Dec 1, 2013
Keywords: Materials Sciences; Modeling and Simulations; Physics; Theoretical and Mathematical Physics; Condensed Matter Physics; Medical Physics
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