A multi-cantilever beam low-frequency FBG acceleration sensor

Abstract The acquisition of 2–50 Hz low-frequency vibration signals is of great significance for the monitoring researches on engineering seismology, bridges & dams, oil & gas exploration, etc. A multi-cantilever beam low-frequency FBG acceleration sensor is proposed against the low sensitiv...

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Autores principales:	Li Hong, Rui Sun, Zhongchao Qiu, Zhiming Han, Yanan Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ec3c23a3284a43adb7a591dbe9d17cf9
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spelling	oai:doaj.org-article:ec3c23a3284a43adb7a591dbe9d17cf92021-12-02T15:31:36ZA multi-cantilever beam low-frequency FBG acceleration sensor10.1038/s41598-021-98055-z2045-2322https://doaj.org/article/ec3c23a3284a43adb7a591dbe9d17cf92021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98055-zhttps://doaj.org/toc/2045-2322Abstract The acquisition of 2–50 Hz low-frequency vibration signals is of great significance for the monitoring researches on engineering seismology, bridges & dams, oil & gas exploration, etc. A multi-cantilever beam low-frequency FBG acceleration sensor is proposed against the low sensitivity that predominates in the low-frequency vibration measurement by FBG acceleration sensors. Structural parameters of the sensor is subjected to simulation analysis and optimization design using the ANSYS software; the real sensor is developed based on the simulation results in the following manner: Three rectangular of the cantilever beams are evenly arranged around the mass block at 120°to improve the sensitivity and alleviate the transverse crosstalk of sensor; in the end, a performance test is performed on the sensor. According to the research findings, the sensor, whose natural frequency is approximately 64 Hz, is applicable for monitoring the low-frequency vibration signals within the range 16–54 Hz. The sensor sensitivity is approximately $$87.955\,{\text{pm/m}}\;{\text{s}}^{ - 2}$$ 87.955 pm/m s - 2 , the linearity being greater than 99%, the transverse interference immunity being lower than 2.58%, and the dynamic range being up to 86 dB. The findings offer a reference for developing sensor of the same type and further improving the sensitivity of fiber optic acceleration sensor.Li HongRui SunZhongchao QiuZhiming HanYanan LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Li Hong Rui Sun Zhongchao Qiu Zhiming Han Yanan Li A multi-cantilever beam low-frequency FBG acceleration sensor
description	Abstract The acquisition of 2–50 Hz low-frequency vibration signals is of great significance for the monitoring researches on engineering seismology, bridges & dams, oil & gas exploration, etc. A multi-cantilever beam low-frequency FBG acceleration sensor is proposed against the low sensitivity that predominates in the low-frequency vibration measurement by FBG acceleration sensors. Structural parameters of the sensor is subjected to simulation analysis and optimization design using the ANSYS software; the real sensor is developed based on the simulation results in the following manner: Three rectangular of the cantilever beams are evenly arranged around the mass block at 120°to improve the sensitivity and alleviate the transverse crosstalk of sensor; in the end, a performance test is performed on the sensor. According to the research findings, the sensor, whose natural frequency is approximately 64 Hz, is applicable for monitoring the low-frequency vibration signals within the range 16–54 Hz. The sensor sensitivity is approximately $$87.955\,{\text{pm/m}}\;{\text{s}}^{ - 2}$$ 87.955 pm/m s - 2 , the linearity being greater than 99%, the transverse interference immunity being lower than 2.58%, and the dynamic range being up to 86 dB. The findings offer a reference for developing sensor of the same type and further improving the sensitivity of fiber optic acceleration sensor.
format	article
author	Li Hong Rui Sun Zhongchao Qiu Zhiming Han Yanan Li
author_facet	Li Hong Rui Sun Zhongchao Qiu Zhiming Han Yanan Li
author_sort	Li Hong
title	A multi-cantilever beam low-frequency FBG acceleration sensor
title_short	A multi-cantilever beam low-frequency FBG acceleration sensor
title_full	A multi-cantilever beam low-frequency FBG acceleration sensor
title_fullStr	A multi-cantilever beam low-frequency FBG acceleration sensor
title_full_unstemmed	A multi-cantilever beam low-frequency FBG acceleration sensor
title_sort	multi-cantilever beam low-frequency fbg acceleration sensor
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/ec3c23a3284a43adb7a591dbe9d17cf9
work_keys_str_mv	AT lihong amulticantileverbeamlowfrequencyfbgaccelerationsensor AT ruisun amulticantileverbeamlowfrequencyfbgaccelerationsensor AT zhongchaoqiu amulticantileverbeamlowfrequencyfbgaccelerationsensor AT zhiminghan amulticantileverbeamlowfrequencyfbgaccelerationsensor AT yananli amulticantileverbeamlowfrequencyfbgaccelerationsensor AT lihong multicantileverbeamlowfrequencyfbgaccelerationsensor AT ruisun multicantileverbeamlowfrequencyfbgaccelerationsensor AT zhongchaoqiu multicantileverbeamlowfrequencyfbgaccelerationsensor AT zhiminghan multicantileverbeamlowfrequencyfbgaccelerationsensor AT yananli multicantileverbeamlowfrequencyfbgaccelerationsensor
_version_	1718387177284435968

A multi-cantilever beam low-frequency FBG acceleration sensor

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