Dr. Lorenzo Comolli Profile

Dr. Lorenzo Comolli

Eng. at Politecnico di Milano

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Publications (16)

Proceedings Article | 2 June 2014 Paper

A mechanical filter for FBG accelerometers

Marco Bocciolone, Giuseppe Bucca, Andrea Collina, Lorenzo Comolli

Proceedings Volume 9157, 91579J (2014) https://doi.org/10.1117/12.2059537

KEYWORDS: Silicon, Fiber Bragg gratings, Sensors, Electronic filtering, Optical filters, Environmental sensing, Mechanical engineering, Electromagnetism, Optical sensors, Aluminum

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Proceedings Article | 10 April 2014 Paper

On the use of electrical and optical strain gauges paired to magnetostrictive patch actuators

Francesco Braghin, Simone Cinquemani, Gabriele Cazzulani, Lorenzo Comolli

Proceedings Volume 9061, 906133 (2014) https://doi.org/10.1117/12.2045044

KEYWORDS: Actuators, Sensors, Fiber Bragg gratings, Magnetism, Vibration control, Control systems, Magnetostrictive materials, Magnetic sensors, Electromagnetism, Optical sensors

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Proceedings Article | 20 May 2013 Paper

A technique to evaluate the good operation of FBG sensors embedded in a carbon fiber beam

Gabriele Cazzulani, Simone Cinquemani, Lorenzo Comolli

Proceedings Volume 8794, 87942S (2013) https://doi.org/10.1117/12.2025858

KEYWORDS: Sensors, Fiber Bragg gratings, Carbon, Actuators, Structured optical fibers, Manufacturing, Smart structures, Vibration control, Reliability, Motion measurement

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Proceedings Article | 20 May 2013 Paper

Application of new optical load cells for in-line measurement of pantograph-catenary contact force

Marco Bocciolone, Giuseppe Bucca, Andrea Collina, Lorenzo Comolli

Proceedings Volume 8794, 879442 (2013) https://doi.org/10.1117/12.2025853

KEYWORDS: Sensors, Dielectrics, Fiber Bragg gratings, Optical testing, Optical design, Optical fibers, Copper, Fiber optics sensors, Temperature metrology, Optics manufacturing

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Proceedings Article | 17 October 2012 Paper

An investigation of the crack propagation in a carbon fiber bonded joint using backface strain measurements with FBG sensors

Andrea Bernasconi, Lorenzo Comolli

Proceedings Volume 8421, 84214Y (2012) https://doi.org/10.1117/12.975143

KEYWORDS: Fiber Bragg gratings, Sensors, Finite element methods, Adhesives, Computer simulations, Optical fibers, Solids, Chemical elements, Carbon, Optical sensors

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Proceedings Article | 17 October 2012 Paper

On the time delays in swept laser FBG interrogators for control systems applications

Gabriele Cazzulani, Simone Cinquemani, Lorenzo Comolli

Proceedings Volume 8421, 842150 (2012) https://doi.org/10.1117/12.975148

KEYWORDS: Fiber Bragg gratings, Sensors, Actuators, Control systems, Laser applications, Time metrology, Vibration control, Signal processing, Data acquisition, Carbon

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Proceedings Article | 17 October 2012 Paper

A novel design of a compact S-shaped balance with FBG sensors for the pantograph-catenary contact force measurement

Marco Bocciolone, Lorenzo Comolli, Pietro Crosio

Proceedings Volume 8421, 84214Z (2012) https://doi.org/10.1117/12.975146

KEYWORDS: Fiber Bragg gratings, Sensors, Calibration, Head, Fiber optics sensors, Dielectrics, Resistance, Temperature metrology, Safety, Aerodynamics

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Proceedings Article | 6 April 2012 Paper

Enhancing active vibration control performances in a smart structure by using fiber Bragg gratings sensors

G. Cazzulani, S. Cinquemani, L. Comolli

Proceedings Volume 8345, 834530 (2012) https://doi.org/10.1117/12.915103

KEYWORDS: Sensors, Fiber Bragg gratings, Actuators, Control systems, Smart structures, Carbon, Structured optical fibers, Vibration control, Fiber optics sensors, Optical fibers

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Proceedings Article | 28 March 2012 Paper

Reducing vibration in carbon fiber structures with piezoelectric actuators and fiber Bragg grating sensors

Gabriele Cazzulani, Simone Cinquemani, Lorenzo Comolli, Andrea Gardella

Proceedings Volume 8341, 83411P (2012) https://doi.org/10.1117/12.915097

KEYWORDS: Sensors, Fiber Bragg gratings, Actuators, Carbon, Structured optical fibers, Control systems, Ferroelectric materials, Vibration control, Fiber optics sensors, Smart structures

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Proceedings Article | 18 May 2011 Paper

Numerical comparison of peak detection algorithms for the response of FBG in non-homogeneous strain fields

Lorenzo Comolli, Andrea Micieli

Proceedings Volume 7753, 77538F (2011) https://doi.org/10.1117/12.885904

KEYWORDS: Fiber Bragg gratings, Sensors, Detection and tracking algorithms, Reflectivity, Analog electronics, Computer simulations, Refractive index, Numerical simulations, Optical fibers, Smart structures

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Proceedings Article | 18 May 2011 Paper

Thermal characterization of FBG strain gauges for the monitoring of the cupola of Duomo di Milano

Alfredo Cigada, Lorenzo Comolli, Alberto Giussani, Fabio Roncoroni, Fabio Zenucchi

Proceedings Volume 7753, 775380 (2011) https://doi.org/10.1117/12.885903

KEYWORDS: Sensors, Fiber Bragg gratings, Calibration, Fiber optics sensors, Thermal effects, Temperature metrology, Uncertainty analysis, Structural health monitoring, Optical fibers, Temperature sensors

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Proceedings Article | 9 September 2010 Paper

Comparison of optical and electrical measurements of the pantograph-catenary contact force

Marco Bocciolone, Giuseppe Bucca, Andrea Collina, Lorenzo Comolli

Proceedings Volume 7653, 765346 (2010) https://doi.org/10.1117/12.866357

KEYWORDS: Sensors, Fiber Bragg gratings, Optical testing, Optical sensors, Dielectrics, Optical fibers, Temperature metrology, Thermal effects, Calibration, Failure analysis

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Proceedings Article | 9 September 2010 Paper

An approach to monitor railway pantograph-catenary interaction with fiber optic sensors

Marco Bocciolone, Giuseppe Bucca, Andrea Collina, Lorenzo Comolli

Proceedings Volume 7653, 76533Q (2010) https://doi.org/10.1117/12.866356

KEYWORDS: Fiber Bragg gratings, Sensors, Fiber optics sensors, Electronic filtering, Interfaces, Optical testing, Mechanical engineering, Fiber optics tests, Fiber optics, Dielectrics

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Proceedings Article | 9 September 2010 Paper

An application of FBG accelerometers for monitoring pantographs of underground trains

Marco Bocciolone, Giuseppe Bucca, Alfredo Cigada, Andrea Collina, Lorenzo Comolli

Proceedings Volume 7653, 765341 (2010) https://doi.org/10.1117/12.866358

KEYWORDS: Fiber Bragg gratings, Sensors, Fiber optics sensors, Head, Electromagnetism, Dielectrics, Analytical research, Data acquisition, Signal attenuation, Optical sensors

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Proceedings Article | 14 May 2010 Paper

First results from in line strain measurements with FBG sensors on the pantograph collector of underground trains

Lorenzo Comolli, Giuseppe Bucca, Marco Bocciolone, Andrea Collina

Proceedings Volume 7726, 772605 (2010) https://doi.org/10.1117/12.854395

KEYWORDS: Sensors, Fiber Bragg gratings, Fiber optics sensors, Head, Calibration, Temperature metrology, Electromagnetism, Dielectrics, Finite element methods, Interfaces

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FBG sensors are particularly suitable for strain measurements on mechanical parts subjected to strong electromagnetic disturbances. This is the case of strain measurements on the pantograph collector strip of underground trains, where, due to arcing phenomena caused by contact loss between the pantograph collector and the contact wire of overhead line during the current collection, high electromagnetic disturbances are present. Moreover, an intrinsic advantage of fiber optic sensors is the ability to electrically insulate the sensor from the conditioning and data-gathering unit. In this work the application of FBG sensors on the pantograph collector of an underground train, instrumented for experimental inline tests, is presented. First, a FEM analysis of the collector to identify the suitable position, in terms of maximum sensitivity and fiber safety, for the strain sensor was performed. The position of a thermal compensating FBG sensor was also selected as a compromise between a place not too far from the main sensor (so that both are subject to the same temperature), and with a small (or negative) strain. The compensated signal is simply computed subtracting the compensator signal from the main one, and this can be considered roughly proportional to the total contact force. A static calibration was conducted in the laboratory with standard masses, and dynamic tests were carried out to dynamically characterize the pantograph. The FBG static measurements were compared with force measurements obtained from traditional sensors positioned on the pantograph collector interface, on each side of the collector, in order to obtain information on the position of vertical contact force. The total vertical contact force from the traditional load cells is compared with the FBG measurement obtained in the center of the collector. The comparison of the total force signals obtained during experimental results for both laboratory and in-line tests showed a good accordance, and these tests can be considered as a validation of the method, so that it can be further developed and used in the future in similar situations.

Proceedings Article | 26 October 2007 Paper

MIMA, a miniaturized infrared spectrometer for Mars ground exploration: Part III. Thermomechanical design

B. Saggin, E. Alberti, L. Comolli, M. Tarabini, G. Bellucci, S. Fonti

Proceedings Volume 6744, 67441S (2007) https://doi.org/10.1117/12.737827

KEYWORDS: Mars, Temperature metrology, Sensors, Interferometers, Spectroscopy, Calibration, Infrared spectroscopy, Infrared radiation, Mirrors, Aluminum

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Showing 5 of 16 publications

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