A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Speckle Analysis Method for Distributed Detection of Temperature Gradients with ΦOTDR
A method to extend the operation of traditional single-frequency phase-sensitive optical time-domain reflectometry (ΦOTDR) to the monitoring of distributed temperature gradients along an optical fiber is proposed and experimentally validated. The measurement principle is derived from the perturbation response of a single-wavelength ΦOTDR signal, which is analyzed as a unidimensional speckle pattern. The method could be implemented in parallel to standard ΦOTDR systems used for distributed vibration sensing with a close to zero cost and without affecting its operation, as it only requires a low computational cost post-processing of the traces which are already acquired. Frequency scanning of the laser, heterodyning or additional hardware are not required. The distributed detection of a temperature gradient of 2.5 °C over 10 min is demonstrated. ; European Commission ; Ministerio de Economía y Competitividad ; Comunidad de Madrid
Speckle Analysis Method for Distributed Detection of Temperature Gradients with ΦOTDR
A method to extend the operation of traditional single-frequency phase-sensitive optical time-domain reflectometry (ΦOTDR) to the monitoring of distributed temperature gradients along an optical fiber is proposed and experimentally validated. The measurement principle is derived from the perturbation response of a single-wavelength ΦOTDR signal, which is analyzed as a unidimensional speckle pattern. The method could be implemented in parallel to standard ΦOTDR systems used for distributed vibration sensing with a close to zero cost and without affecting its operation, as it only requires a low computational cost post-processing of the traces which are already acquired. Frequency scanning of the laser, heterodyning or additional hardware are not required. The distributed detection of a temperature gradient of 2.5 °C over 10 min is demonstrated. ; European Commission ; Ministerio de Economía y Competitividad ; Comunidad de Madrid
Speckle Analysis Method for Distributed Detection of Temperature Gradients with ΦOTDR
García Ruiz, Andrés (author) / Pastor Graells, Juan (author) / Fidalgo Martins, Hugo (author) / Martín López, Sonia (author) / González Herráez, Miguel (author) / Ingeniería Fotónica / Universidad de Alcalá. Departamento de Electrónica
2016-09-15
doi:10.1109/LPT.2016.2578043
Article (Journal)
Electronic Resource
English
Time-expanded ΦOTDR based on Orthogonal Polarization Frequency Comb generation
| BASE | 2024
Sub-centimeter spatial resolution dynamic strain sensing using time-expanded ΦOTDR
| BASE | 2024
Measurement of Strain Gradients Using Digital Image Correlation by Applying Printed-Speckle Patterns
| British Library Online Contents | 2016
INTRUSION DETECTION SYSTEM BASED ON SPECKLE PATTERN ANALYSIS
| British Library Online Contents | 2005