A Highly Sensitive Two-Dimensional Inclinometer Based on Two Etched Chirped-Fiber-Grating Arrays
We present a novel two-dimensional fiber-optic inclinometer with high sensitivity by crisscrossing two etched chirped fiber Bragg gratings (CFBG) arrays. Each array is composed of two symmetrically-arranged CFBGs. By etching away most of the claddings of the CFBGs to expose the evanescent wave, the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-12-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/17/12/2922 |
| _version_ | 1811183953602674688 |
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| author | Hung-Ying Chang Yu-Chung Chang Wen-Fung Liu |
| author_facet | Hung-Ying Chang Yu-Chung Chang Wen-Fung Liu |
| author_sort | Hung-Ying Chang |
| collection | DOAJ |
| description | We present a novel two-dimensional fiber-optic inclinometer with high sensitivity by crisscrossing two etched chirped fiber Bragg gratings (CFBG) arrays. Each array is composed of two symmetrically-arranged CFBGs. By etching away most of the claddings of the CFBGs to expose the evanescent wave, the reflection spectra are highly sensitive to the surrounding index change. When we immerse only part of the CFBG in liquid, the effective index difference induces a superposition peak in the refection spectrum. By interrogating the peak wavelengths of the CFBGs, we can deduce the tilt angle and direction simultaneously. The inclinometer has a resolution of 0.003° in tilt angle measurement and 0.00187 rad in tilt direction measurement. Due to the unique sensing mechanism, the sensor is temperature insensitive. This sensor can be useful in long term continuous monitoring of inclination or in real-time feedback control of tilt angles, especially in harsh environments with violent temperature variation. |
| first_indexed | 2024-04-11T13:06:28Z |
| format | Article |
| id | doaj.art-c3b482b1f8d9408894c1a7042bd6d1e5 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:06:28Z |
| publishDate | 2017-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-c3b482b1f8d9408894c1a7042bd6d1e52022-12-22T04:22:46ZengMDPI AGSensors1424-82202017-12-011712292210.3390/s17122922s17122922A Highly Sensitive Two-Dimensional Inclinometer Based on Two Etched Chirped-Fiber-Grating ArraysHung-Ying Chang0Yu-Chung Chang1Wen-Fung Liu2Program of Electrical and Communications Engineering, Feng-Chia University, 100 Wenhwa Rd., Seatwen, Taichung 40724, TaiwanDepartment of Electrical Engineering, National Changhua University of Education, 2 Shida Rd., Changhua 50074, TaiwanDepartment of Electrical Engineering, Feng-Chia University, 100 Wenhwa Rd., Seatwen, Taichung 40724, TaiwanWe present a novel two-dimensional fiber-optic inclinometer with high sensitivity by crisscrossing two etched chirped fiber Bragg gratings (CFBG) arrays. Each array is composed of two symmetrically-arranged CFBGs. By etching away most of the claddings of the CFBGs to expose the evanescent wave, the reflection spectra are highly sensitive to the surrounding index change. When we immerse only part of the CFBG in liquid, the effective index difference induces a superposition peak in the refection spectrum. By interrogating the peak wavelengths of the CFBGs, we can deduce the tilt angle and direction simultaneously. The inclinometer has a resolution of 0.003° in tilt angle measurement and 0.00187 rad in tilt direction measurement. Due to the unique sensing mechanism, the sensor is temperature insensitive. This sensor can be useful in long term continuous monitoring of inclination or in real-time feedback control of tilt angles, especially in harsh environments with violent temperature variation.https://www.mdpi.com/1424-8220/17/12/2922etched fiber Bragg gratingchirped fiber Bragg grating (CFBG)level meterinclinometertilt meterfiber sensor |
| spellingShingle | Hung-Ying Chang Yu-Chung Chang Wen-Fung Liu A Highly Sensitive Two-Dimensional Inclinometer Based on Two Etched Chirped-Fiber-Grating Arrays Sensors etched fiber Bragg grating chirped fiber Bragg grating (CFBG) level meter inclinometer tilt meter fiber sensor |
| title | A Highly Sensitive Two-Dimensional Inclinometer Based on Two Etched Chirped-Fiber-Grating Arrays |
| title_full | A Highly Sensitive Two-Dimensional Inclinometer Based on Two Etched Chirped-Fiber-Grating Arrays |
| title_fullStr | A Highly Sensitive Two-Dimensional Inclinometer Based on Two Etched Chirped-Fiber-Grating Arrays |
| title_full_unstemmed | A Highly Sensitive Two-Dimensional Inclinometer Based on Two Etched Chirped-Fiber-Grating Arrays |
| title_short | A Highly Sensitive Two-Dimensional Inclinometer Based on Two Etched Chirped-Fiber-Grating Arrays |
| title_sort | highly sensitive two dimensional inclinometer based on two etched chirped fiber grating arrays |
| topic | etched fiber Bragg grating chirped fiber Bragg grating (CFBG) level meter inclinometer tilt meter fiber sensor |
| url | https://www.mdpi.com/1424-8220/17/12/2922 |
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