scholarly journals Implementation of a Mobile Platform Based on Fiber Bragg Grating Sensors for Automotive Traffic Monitoring

Sensors ◽  
2020 ◽  
Vol 20 (6) ◽  
pp. 1567 ◽  
Author(s):  
Kivilcim Yuksel ◽  
Damien Kinet ◽  
Karima Chah ◽  
Christophe Caucheteur
Keyword(s):  
Fiber Optic ◽  
Traffic Monitoring ◽  
Fiber Optic Sensors ◽  
Mobile Platform ◽  
Vehicle Speed ◽  
Distributed Monitoring ◽  
Fiber Bragg Grating Sensors ◽  
Weigh In Motion ◽  
Monitoring Applications ◽  
Fbg Sensors

Instrumentation techniques, implementation and installation methods are major concerns in today’s distributed and quasi-distributed monitoring applications using fiber optic sensors. Although many successful traffic monitoring experiments have been reported using Fiber Bragg Gratings (FBGs), there has been no standardized solution proposed so far to have FBG seamlessly implemented in roads. In this work, we investigate a mobile platform including FBG sensors that can be positioned on roads for the purpose of vehicle speed measurements. The experimental results prove the efficiency of the proposed platform, providing a perspective toward weigh-in-motion systems.

Fiber optic sensors for traffic monitoring applications

1998 ◽  
Author(s):  
Pekka Suopajaervi ◽  
Riku Pennala ◽  
Mikko Heikkinen ◽  
Pentti Karioja ◽  
Veijo Lyori ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Traffic Monitoring ◽  
Fiber Optic Sensors ◽  
Monitoring Applications

scholarly journals Improved axle detection for bridge weigh-in-motion systems using fiber optic sensors

2017 ◽  
Vol 7 (3) ◽  
pp. 325-332 ◽  
Author(s):  
Myra Lydon ◽  
D. Robinson ◽  
S. E. Taylor ◽  
G. Amato ◽  
E. J. O. Brien ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Axle Detection ◽  
Weigh In Motion ◽  
Bridge Weigh In Motion

An Experimental Study on the Process Monitoring of Resin Transfer Molded Composite Structures Using Fiber Optic Sensors

2012 ◽  
Vol 134 (4) ◽  
Author(s):  
Mehmet Yildiz ◽  
Nazli G. Ozdemir ◽  
Gokhan Bektas ◽  
Casey J. Keulen ◽  
Talha Boz ◽  
...  
Keyword(s):  
Process Monitoring ◽  
Composite Structures ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Fresnel Reflection ◽  
Cure Monitoring ◽  
Rtm Process ◽  
Fiber Reinforcements ◽  
Fbg Sensors

Research conducted on in situ process monitoring of resin transfer molded composites with fiber optic sensors is presented. A laboratory scale resin transfer molding (RTM) apparatus was designed and built with the capability of embedding fiber optic sensors and visually observing the resin filling process. Both fiber Bragg grating (FBG) and etched fiber (EF) sensors are embedded into glass fiber reinforcements in the RTM mold and used to monitor the resin flow front and cure. The cure cycle of the resin system utilized in this work is also studied using a Fresnel reflection refractometer (FRR) sensor. The results of this study show that both the FBG and EF sensors can be used efficiently for flow and cure monitoring of the RTM process. The experimental results of the EF and FRR sensors agree with those of the FBG sensors for cure monitoring.

New Fabry-Perot Fiber-Optic Sensors for Structural and Geotechnical Monitoring Applications

1997 ◽  
Vol 1596 (1) ◽  
pp. 39-44 ◽  
Author(s):  
P. Choquet ◽  
R. Leroux ◽  
F. Juneau
Keyword(s):  
Strain Gauge ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Strain Gauges ◽  
Surface Type ◽  
Geotechnical Monitoring ◽  
Fabry Perot ◽  
Monitoring Applications ◽  
New Sensors ◽  
Accuracy And Repeatability

A new line of fiber-optic sensors suited for structural and geotechnical monitoring purposes is presented. A Fabry-Perot strain gauge is contained in each of the new sensors introduced here: four embedded and surface-type strain gauges and one type of temperature gauge. Described here are the working and reading principles of the basic Fabry-Perot strain gauge. One of the gauge’s features that allows for temperature-compensated or noncompensated measurements is described, and the various sensors constructed around the gauge are presented. These newly developed sensors exhibit high accuracy and repeatability, as illustrated by various calibration tests reported here.

scholarly journals Laboratory and In-Situ Testing of Integrated FBG Sensors for SHM for Concrete and Timber Structures

Sensors ◽  
2020 ◽  
Vol 20 (6) ◽  
pp. 1661 ◽  
Author(s):  
Kristýna Čápová ◽  
Lukáš Velebil ◽  
Jan Včelák
Keyword(s):  
Prestressed Concrete ◽  
Fiber Optic ◽  
Analytical Data ◽  
Fiber Optic Sensors ◽  
Transport Infrastructure ◽  
Second Phase ◽  
Loading Tests ◽  
Fbg Sensors ◽  
Prestressed Concrete Bridge

Long-term structural health monitoring (SHM) plays an important role in the safety of public transport infrastructure such as bridges or tunnels and warns in the event of any emerging problem. This article describes development and testing of system based on fiber Bragg grating (FBG) sensors that can detect changes in strain and temperature. The first phase of the research has been focused on the development of new fiber optic sensors for the monitoring of concrete structures and their investigation in laboratory conditions. The work also shows novel applicability of the same FBG technology for glulam structures. Mechanical loading tests of the concrete beam as well as glulam beam with embedded sensors were carried out. Data measured by developed fiber optic sensors were compared with the readings from reference sensors as well as with the analytically calculated values. The achieved results proved good agreement between the measured data, analytical data and reference methods. In second phase of the research, the pilot installation of the sensors was carried out on the newly constructed prestressed-concrete bridge. The bridge was monitored throughout pre-stressing phase and monitoring continued after the completion of the construction works. Problems with the fragility of the sensors occurred during the measurements, but the obtained results provide a good basis for further improvement of the system.

scholarly journals Vehicle Speed Calculation Using Weigh-in-Motion Sensor Based on Fiber Optic

2021 ◽  
Author(s):  
Mefina Yulias Rofianingrum ◽  
Bambang Widiyatmoko ◽  
Rini Khamimatul Ula
Keyword(s):  
Fiber Optic ◽  
Motion Sensor ◽  
Vehicle Speed ◽  
Weigh In Motion

Design of an Embedded Sensor Network for Manufacturing Process Monitoring, Quality Control Management and Structural Health Assessment of Advanced Composite Structures

2010 ◽  
Author(s):  
Casey Keulen ◽  
Bruno Rocha ◽  
Afzal Suleman ◽  
Mehmet Yildiz
Keyword(s):  
Sensor Network ◽  
Health Monitoring ◽  
Composite Structures ◽  
Fiber Optic ◽  
Lamb Waves ◽  
Fiber Optic Sensors ◽  
Composite Panels ◽  
Fiber Sensors ◽  
Structural Health ◽  
Fbg Sensors

This paper proposes the use of an embedded network of fiber optic sensors for process and Structural Health Monitoring (SHM) of Resin Transfer Molded (RTM) composite structures. A single sensor network is used at each stage of life of a RTM composite panel: flow monitoring, cure monitoring and health monitoring. A laboratory scale RTM apparatus was designed and built with the capability of visually monitoring the resin filling process. A technique for embedding fiber optic sensors into the mold has also been developed. Both Fiber Bragg Gratings (FBG) and Etched Fiber Sensors (EFS) have been embedded in composite panels using the apparatus. Etched Fiber Sensors have the capability of detecting the presence of resin. The sensors have proven to be capable of detecting the presence of resin at various locations as it is injected into the mold and have the capability of being multiplexed with FBGs thus reducing the number of ingress/egress locations required per sensor. Two FBGs and three EFSs were embedded on a single optical fiber. Tensile test specimens that contain embedded FBG sensors have also been produced with this apparatus. These specimen and embedded sensors have been characterized using a strain gage and a material testing machine. FBG sensors have been embedded into composite panels also in a manner that is conducive to detecting Lamb waves generated with a centrally located PZT. To detect Lamb waves a high speed, high precision sensing technique is required for embedded FBGs, since these guided waves travel through the material at very high velocities, presenting relatively small strain amplitudes. A technique based in a filter consisting of a second FBG was developed. Since this filter is not dependant on moving parts, it does not limit the velocity or frequency at which the tests can be performed. Preliminary tests performed using this filter showed that it is possible to detect Lamb waves with amplitudes smaller than 1 microstrain. A damage detection algorithm has been developed and is applied to this system in an attempt to detect and localize damages (cracks and delaminations) in the composite structure.

Sign in / Sign up

Export Citation Format

Share Document