Development and assessment of a fiber-optic liquid level sensor with long-period fiber grating and Shewhart control charts

Jian-Neng Wang; Chen-Han Jan; Jaw-Luen Tang; Wei-Te Wu; Der-Cheng Chen; Chien-Hsing Chen; Jial-Yan Syu; Ching-Ying Luo

doi:10.1117/12.905055

15 November 2011 Development and assessment of a fiber-optic liquid level sensor with long-period fiber grating and Shewhart control charts

Jian-Neng Wang, Chen-Han Jan, Jaw-Luen Tang, Wei-Te Wu, Der-Cheng Chen, Chien-Hsing Chen, Jial-Yan Syu, Ching-Ying Luo

Author Affiliations +

Proceedings Volume 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation; 83212G (2011) https://doi.org/10.1117/12.905055
Event: Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 2011, Yunnan, China

Abstract

This paper presents the development and assessment of a liquid level sensor using long-period fiber grating (LPFG) technology and Shewhart control charts. The 22-mm LPFGs were fabricated with the point-by-point CO2 laser engraving method. This sensor was designed in such a way that it could be moved up and down with a position controller. The experimental section covered LPFG position sensing test, liquid level detection capacity and reliability measurements, and sensing resolution evaluation. LPFG position sensing test was studied and confirmed by the resonance wavelength shifts which were significantly generated when 75% of the LPFG was immersed in water. There were ten groups of different liquid level capacity testing and each group underwent ten repeated measurements. Based on Shewhart control charts including an X-bar chart, s chart, and R chart, the results showed all measurands within the upper and lower control limits. This sensor was reliable and the liquid level could be measured at least 1000 mm. The transmission loss versus the percent of immersion of the LPFG sensor for water and green tea was used to study the sensing resolution. The findings show the LPFG-based liquid sensor had at least 1000-mm level measurement capacity and about 2-mm resolution.

Citation Download Citation

Jian-Neng Wang, Chen-Han Jan, Jaw-Luen Tang, Wei-Te Wu, Der-Cheng Chen, Chien-Hsing Chen, Jial-Yan Syu, and Ching-Ying Luo "Development and assessment of a fiber-optic liquid level sensor with long-period fiber grating and Shewhart control charts", Proc. SPIE 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 83212G (15 November 2011); https://doi.org/10.1117/12.905055

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Liquids

Sensors

Cladding

Fiber optics sensors

Sensing systems

Liquid crystal lasers

Reliability

Show All Keywords

Keywords/Phrases

Search In:

Publication Years