Fiber optic system design for vehicle detection and analysis

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27240%2F16%3A86097556" target="_blank" >RIV/61989100:27240/16:86097556 - isvavai.cz</a>

Result on the web

<a href="http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2519141" target="_blank" >http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2519141</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2239549" target="_blank" >10.1117/12.2239549</a>

Result language

angličtina

Original language name

Fiber optic system design for vehicle detection and analysis

Original language description

Fiber optic interferometers belong to a group of highly sensitive and precise devices enabling to measure small changes in the deformation shapes, changes in pressure, temperature, vibration and so on. The basis of their activity is to evaluate the number of fringes over time, not changes in the intensity of the optical signal. The methodology described in the article is based on using the interferometer to monitor traffic density. The base of the solution is a Mach-Zehnder interferometer operating with single-mode G.652 optical fiber at the wavelength of 1550 nm excited by a DFB laser. The power distribution of the laser light into the individual arms of the interferometer is in the ratio 1:1. Realized measuring scheme was terminated by an optical receiver including InGaAs PIN photodiode. Registered signal from the photodetector was through 8 Hz high pass filter fed to the measuring card that captures the analog input voltage using an application written in LabView development environment. The interferometer was stored in a waterproof box and placed at the side of the road. Here panned individual transit of cars in his environs. Vertically across the road was placed in contact removable belt simulating a retarder, which was used when passing cars to create sufficient vibration response detecting interferometer. The results demonstrated that the individual vehicles passing around boxing showed characteristic amplitude spectra, which was unique for each object, and had sufficient value signal to noise ratio (SNR). The signal was processed by applications developed for the amplitude-frequency spectrum. Evaluated was the maximum amplitude of the signal and compared to the noise. The results were verified by repeated transit of the different types of cars.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JA - Electronics and optoelectronics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of SPIE - The International Society for Optical Engineering

ISBN

978-1-5106-0134-5

ISSN

0277-786X

e-ISSN

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Number of pages

8

Pages from-to

1-8

Publisher name

SPIE

Place of publication

Bellingham

Event location

Brusel

Event date

Apr 5, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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