Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Erick Merliot.
Advances in Civil Engineering | 2010
Jean-Marie Henault; Gautier Moreau; Sylvain Blairon; Jean Salin; Jean-Robert Courivaud; Frédéric Taillade; Erick Merliot; Jean-Philippe Dubois; Johan Bertrand; Stéphane Buschaert; Stefan Mayer; Sylvie Delepine-Lesoille
Although optical fiber sensors have been developed for 30 years, there is a gap between lab experiments and field applications. This article focuses on specific methods developed to evaluate the whole sensing chain, with an emphasis on (i) commercially-available optoelectronic instruments and (ii) sensing cable. A number of additional considerations for a successful pairing of these two must be taken into account for successful field applications. These considerations are further developed within this article and illustrated with practical applications of water leakage detection in dikes and concrete structures monitoring, making use of distributed temperature and strain sensing based on Rayleigh, Raman, and Brillouin scattering in optical fibers. They include an adequate choice of working wavelengths, dedicated localization processes, choices of connector type, and further include a useful selection of traditional reference sensors to be installed nearby the optical fiber sensors, as well as temperature compensation in case of strain sensing.
Smart Materials and Structures | 2006
Sylvie Delepine-Lesoille; Erick Merliot; Claude Boulay; Lionel Quetel; Marie Delaveau; Alain Courteville
This paper reports on the design and realization of a new optical fibre sensor for continuous measurement of concrete strain over very long distances. We propose a composite-made wave-like sensor body that enables continuous bonding between optical fibre and concrete. Finite element analysis shows that the stiffness of the optical fibre can be adapted to that of the concrete, reducing the strain concentrations and the need for a theoretical calibration factor. Moreover, unlike the body of traditional I-shaped sensors, a wave-like sensor body enables a symmetrical response in tensile and compressive loadings whatever the contact conditions may be. We have realized optical fibre extensometers based on this technique and on a low-coherence interferometry method for the measurements. Despite its wave-shape, the proposed sensor body does not introduce any losses or strain that would result from fibre microbending. The process of realization is adapted to distributed sensors and sensors with a very long gauge length. Furthermore, several sensors were multiplexed, demonstrating the ability to perform quasi-distributed measurements. Once embedded into concrete cylinders, the optical fibre sensors were tested under compressive and tensile loading, and compared with traditional sensors. The allocation of one of the multiplexed sensors as a dummy gauge provides self-compensation for thermal effects and ambient fluctuations. As a result, and without any calibration factor, optical sensor measurements perfectly agreed with external linear variable differential transducer measurements.
IEEE Sensors Journal | 2008
Vincent Lanticq; Marc Quiertant; Erick Merliot; Sylvie Delepine-Lesoille
We report on the design and experimental validation of a distributed Brillouin-based optical fiber sensor embedded into concrete structures for temperature and strain measurement. A composite-made wave-like coating designed by finite-element analysis ensures the sensor is transferring optimally temperature and strain fields from the concrete to the optical fiber, where Brillouin scattering takes place. During all experiments, sensors have been interrogated with a commercially available Brillouin optical time-domain reflectometer unit. First, temperature sensitivity of the Brillouin frequency shift were evaluated in PANDA and SMF28 optical fibers, before wrapping them into the specific sheath for embedment into a 3 m-long reinforced concrete beam. Temperature measurements during concrete beam casting agreed with reference measurements, and showed the significant sensor coating influence. A month later, strain measurements performed during a four-point bending experiment showed promising results: linearity and reliability of measurements were demonstrated, under tensile as well as compressive loadings.
IEEE Sensors Journal | 2008
Sylvie Delepine-Lesoille; Erick Merliot; Yves Gautier; Lionel Quetel; Marie Delaveau; Alain Courteville
We present a novel concept of quasi-distributed flexible optical fiber extensometers fully compensated from thermal variations. Developed for structural health monitoring applications, the sensors are composed of a combination of intrinsic Fabry-Perot cavities as long-base extensometers, and point-like Bragg gratings inserted along the same fiber used as temperature sensors. This configuration enables a high degree of multiplexing, thus quasi-distributed sensing, and very efficient temperature compensation. Both types of sensors are read by a fiber-optic low-coherence interferometer, used in an original way to measure simultaneously the length variations of the cavities and the wavelength shifts of the Bragg gratings. Finally, we present the experimental validation of the whole measurement system, suitable for concrete structures instrumentation, as it includes an original optical fiber sheath packaging the optical fiber as a flexible sensor.
Proceedings of SPIE, the International Society for Optical Engineering | 2005
Sylvie Delepine-Lesoille; Erick Merliot; Marie Delaveau; Alain Courteville; Lionel Quetel
This paper reports on the design and realization of a new optical fibre sensor body meant for embedding distributed optical fibre sensors into concrete. We have carried out a finite element analysis which shows that the proposed wave-like sensor enables continuous bonding between optical fibre and concrete, symmetrical response in traction and compression whatever the contact conditions may be. The stiffness of the optical fibre can so be adapted to the concrete, which reduces strain concentrations and need for a theoretical calibration factor. Experimental validations are carried out, showing that despite its wave-shape, the proposed sensor body does not introduce any losses or strain that would result from fibre macrobendings. The process of realization is very cheap, thus dedicated to distributed sensors. We have realized optical fibre extensometers based on this technique and on low-coherence interferometry method for the measurements, including an original approach of thermal effect compensation. Preliminary results are very encouraging.
Materials and Structures | 2014
Claude Boulay; Stéphanie Staquet; Brice Delsaute; Jerome Carette; Michela Crespini; Oumaya Yazoghli-Marzouk; Erick Merliot; Sandrine Ramanich
Archive | 2006
Alain Courteville; Marie Delaveau; Sylvie Delepine-Lesoille; Erick Merliot
Optical Fiber Sensors (2006), paper ThD6 | 2006
Vincent Lanticq; Erick Merliot; Sylvie Delepine-Lesoille
Proceedings of the 8th International Conference | 2008
François Toutlemonde; Stéphanie Staquet; Erick Merliot; C. Nguyen Van Phu; François Derkx
Bulletin de liaison des laboratoires des ponts et chaussées | 2008
Stéphanie Staquet; Erick Merliot; C. Nguyen Van Phu; François Derkx; François Toutlemonde