Mathematical model of optimized design of multi-point sensoric measurement with Bragg gratings using wavelength divison multiplex

Fajkus, Marcel; Nedoma, Jan; Kepák, Stanislav; Rapant, Lukáš; Martínek, Radek; Bednarek, Lukas; Novák, Martin; Vašinek, Vladimír

doi:10.1117/12.2239551

Cited by 6 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Each FBG sensor is assigned a specific measurement window. The fiber Bragg gratings of individual sensors belonging to a specific type of spectral model [ 36 ] are given by the relationship:

where

is a Bragg wavelength of the n -th sensor,

is a wavelength of the left boundary of spectral region’s radiation source,

is a normalized deformation coefficient,

is a positive measurement scope,

is a negative measurement scope and

is a Guard Band. The maximum number of sensors that can be evaluated from one optic fiber is limited by the right boundary of the radiation source (the right boundary of the last measurement window must be smaller than the right boundary of the radiation source).…”

Section: Methodsmentioning

confidence: 99%

A Non-Invasive Multichannel Hybrid Fiber-Optic Sensor System for Vital Sign Monitoring

Fajkus

Nedoma

Martínek

et al. 2017

Sensors

Self Cite

134

View full text Add to dashboard Cite

In this article, we briefly describe the design, construction, and functional verification of a hybrid multichannel fiber-optic sensor system for basic vital sign monitoring. This sensor uses a novel non-invasive measurement probe based on the fiber Bragg grating (FBG). The probe is composed of two FBGs encapsulated inside a polydimethylsiloxane polymer (PDMS). The PDMS is non-reactive to human skin and resistant to electromagnetic waves, UV absorption, and radiation. We emphasize the construction of the probe to be specifically used for basic vital sign monitoring such as body temperature, respiratory rate and heart rate. The proposed sensor system can continuously process incoming signals from up to 128 individuals. We first present the overall design of this novel multichannel sensor and then elaborate on how it has the potential to simplify vital sign monitoring and consequently improve the comfort level of patients in long-term health care facilities, hospitals and clinics. The reference ECG signal was acquired with the use of standard gel electrodes fixed to the monitored person’s chest using a real-time monitoring system for ECG signals with virtual instrumentation. The outcomes of these experiments have unambiguously proved the functionality of the sensor system and will be used to inform our future research in this fast developing and emerging field.

show abstract

“…Each FBG sensor is assigned a specific measurement window. The fiber Bragg gratings of individual sensors belonging to a specific type of spectral model [ 36 ] are given by the relationship:

where

is a Bragg wavelength of the n -th sensor,

is a wavelength of the left boundary of spectral region’s radiation source,

is a normalized deformation coefficient,

is a positive measurement scope,

is a negative measurement scope and

Section: Methodsmentioning

confidence: 99%

A Non-Invasive Multichannel Hybrid Fiber-Optic Sensor System for Vital Sign Monitoring

Fajkus

Nedoma

Martínek

et al. 2017

Sensors

Self Cite

134

View full text Add to dashboard Cite

show abstract

“…Sensor FBG dapat dengan mudah digunakan pada jenis teknik multiplexing yaitu wavelength-division multiplex dan time division multiplex [13,14].…”

Section: Tinjauan Pustakaunclassified

Aplikasi Sistem Sensor Fiber Bragg Grating Untuk Pendeteksian Simulasi Denyut Jantung

Saktioto

2021

JKFI

View full text Add to dashboard Cite

Heart rate detection still widely develops one to human behavior, so that efforts are regnired to investigrate other ways to more easily detect it. Currently, heart detection can be done without medical ceek up, such as using cellphones, watches, and others. Fiber Bragg Grating (FBG) can be used to detect the heart rate, in the form of pressure which causes a change in strain. FBG also has high sensitivity to strain. Heart rate detection can be measured in several ways such as using a telescope, but FBG has a high level of accuracy. This study aims to design and measure changes in the output power of the FBG and analyze the effect of strain changes on the FBG by loudspeaker vibration. Bragg wavelengths used are 1310 nm and 1550 nm with a power of 1 mW as a diode laser source and the output is measured by an optical power meter. The highest output power change at 1310 nm Bragg wavelength is 0.736 µW, while at 1550 nm wavelength it is 0.009 µW. The highest Bragg wavelength shift is at the Bragg 1310 nm wavelength of 0.598 nm, while at the Bragg 1550 nm wavelength it is 0.552 nm. The highest strain change at the Bragg 1310 nm wavelength is 576,186 µε, while at the Bragg 1550 nm wavelength it is 432,113 µε. This shows that the response at the Bragg 1310 nm wavelength is more sensitive than the Bragg 1550 nm wavelength.

show abstract

“…When modeling the sensory branch, it is necessary to consider other factors such as manufacturing tolerance of Bragg wavelength in FBG production, effect of Bragg grating encapsulation in PDMS polymer, effect of asphalt curing, uneven distribution of road temperature changes, etc. Based on analysis [31], which beyond the scope of this article, a 2 nm margin was defined. For this reason, 4 nm (2 nm for measuring and 2 nm for other factors described above) is available for each measuring channel.…”

Section: Design and Implementation Of Pdms-fbg Sensor-chain For Simentioning

confidence: 99%

PDMS-FBG-Based Fiber Optic System for Traffic Monitoring in Urban Areas

et al. 2020

Self Cite

View full text Add to dashboard Cite

This article introduces fiber Bragg grating (FBG) system for monitoring selected traffic flow parameters in urban areas. The system is able to monitor traffic density or speed of cars driving in single lane. The proposed system consists of five Bragg gratings encapsulated in Polydimethylsiloxane polymer and is characterized by easy and inexpensive installation in the milled upper layer of the road covered with an asphalt mixture. The results of first operational tests presented in this study include 3978 passing vehicles of various specifications. The system's vehicle detection success rate is 99.62%. And further, a mean absolute error 1.35 kph and a relative error 2.62% when measuring vehicle speed.

show abstract

Mathematical model of optimized design of multi-point sensoric measurement with Bragg gratings using wavelength divison multiplex

Cited by 6 publications

References 5 publications

A Non-Invasive Multichannel Hybrid Fiber-Optic Sensor System for Vital Sign Monitoring

A Non-Invasive Multichannel Hybrid Fiber-Optic Sensor System for Vital Sign Monitoring

Aplikasi Sistem Sensor Fiber Bragg Grating Untuk Pendeteksian Simulasi Denyut Jantung

PDMS-FBG-Based Fiber Optic System for Traffic Monitoring in Urban Areas

Contact Info

Product

Resources

About