Mechanical Vibration Sensing for Structural Health Monitoring Using a Millimeter-Wave Doppler Radar Sensor

Abstract : In-service detection of material failures based on an integrated sensor network is the main goal of structural health monitoring (SHM). In this paper, we report on a millimeter-wave Doppler radar sensor operating at 102GHz that enables accurate and non-contact mechanical vibration sensing. Thanks to the unique properties of mm-wave radiation it is possible to penetrate through many non-conducting materials. In contrast to Laser-Doppler-vibrometry this modality enables non-contact vibration measurements behind barriers such as glass-fiber-reinforced plastics, sandwich structures, foams, ceramics etc. Experimental measurements are shown for damage detection and non-linear motion sensing. The unique properties of mm-wave radiation promise great potential for a multitude of future SHM-applications.
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Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014
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Jochen Moll, Kaspar Bechtel, Bernd Hils, Viktor Krozer. Mechanical Vibration Sensing for Structural Health Monitoring Using a Millimeter-Wave Doppler Radar Sensor. Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014. 〈hal-01022029〉

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