Results 21 to 30 of about 131,942 (264)

Innovative Photonic Sensors for Safety and Security, Part I: Fundamentals, Infrastructural and Ground Transportations

open access: yesSensors, 2023
Our group, involving researchers from different universities in Campania, Italy, has been working for the last twenty years in the field of photonic sensors for safety and security in healthcare, industrial and environment applications. This is the first
Aldo Minardo   +30 more
doaj   +1 more source

Lamb Wave Detection for Structural Health Monitoring Using a ϕ-OTDR System

open access: yesSensors, 2022
In this paper, the use of a phase-sensitive optical time-domain reflectometry (ϕ-OTDR) sensor for the detection of the Lamb waves excited by a piezoelectric transducer in an aluminum plate, is investigated.
Rizwan Zahoor   +6 more
doaj   +1 more source

Nature-Inspired Drone Swarming for Real-Time Aerial Data-Collection Under Dynamic Operational Constraints

open access: yesDrones, 2019
Unmanned Aerial Vehicles (UAVs) with acceptable performance are becoming commercially available at an affordable cost. Due to this, the use of drones for real-time data collection is becoming common practice by individual practitioners in the areas of e ...
Hanno Hildmann   +3 more
doaj   +1 more source

A Review of Recent Distributed Optical Fiber Sensors Applications for Civil Engineering Structural Health Monitoring

open access: yesSensors, 2021
The present work is a comprehensive collection of recently published research articles on Structural Health Monitoring (SHM) campaigns performed by means of Distributed Optical Fiber Sensors (DOFS).
Mattia Francesco Bado, Joan R. Casas
doaj   +1 more source

Distributed Wideband Spectrum Sensing

open access: yesCoRR, 2015
6 pages, 6 figures, submitted to ieee Globecom ...
Thomas Kealy   +2 more
openaire   +2 more sources

Structural Health Monitoring in Composite Structures by Fiber-Optic Sensors

open access: yesSensors, 2018
Fiber-optic sensors cannot measure damage; to get information about damage from strain measurements, additional strategies are needed, and several alternatives are available in the existing literature. This paper discusses two independent procedures. The
Alfredo Güemes   +4 more
doaj   +1 more source

Graphical Optimization of Spectral Shift Reconstructions for Optical Backscatter Reflectometry

open access: yesSensors, 2021
Optical backscatter reflectometry (OBR) is an interferometric technique that can be used to measure local changes in temperature and mechanical strain based on spectral analyses of backscattered light from a singlemode optical fiber.
Daniel C. Sweeney   +2 more
doaj   +1 more source

Towards Distributed Measurements of Electric Fields Using Optical Fibers: Proposal and Proof-Of-Concept Experiment

open access: yesSensors, 2020
Nowadays there is an increasing demand for the cost-effective monitoring of potential threats to the integrity of high-voltage networks and electric power infrastructures.
Regina Magalhães   +6 more
doaj   +1 more source

A Low-Cost Water Depth and Electrical Conductivity Sensor for Detecting Inputs into Urban Stormwater Networks

open access: yesSensors, 2021
High-resolution data collection of the urban stormwater network is crucial for future asset management and illicit discharge detection, but often too expensive as sensors and ongoing frequent maintenance works are not affordable.
Baiqian Shi   +8 more
doaj   +1 more source

Target Altitude Estimation in Over-the-Horizon Radar

open access: yesIEEE Access, 2022
Doppler signatures of local multipath signals provide useful information for target altitude estimation in over-the-horizon radar surveillance. In this paper, we develop a method to improve the resolution of these multipath Doppler signatures and enable ...
Yimin D. Zhang   +2 more
doaj   +1 more source

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