Abstract

MARQUEZ BORBON, I. et al. Sensor distribuido para la detección de esfuerzos de umbral mediante rejillas de Bragg. Rev. mex. fis. [online]. 2003, vol.49, n.6, pp.542-548. ISSN 0035-001X.

For early warning and alarm systems, it is required to detect appearance of the monitored parameter, such as temperature or strain, within some predetermined interval. A system must generate an alarm signal when the monitored parameter approaches near or crosses the limit of the dangerous zone. For such applications, we propose a simple distributed sensor based on a large array of equal Bragg gratings. An interrogation of the sensor is performed at a fixed wavelength. We discuss a principle of operation of the sensor and present results of experimental demonstration of this technique for distributed detection of excess strain.

Keywords : Bragg gratings; distributed sensor; strain.

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