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

2011 ◽  
Author(s):  
Jian-Neng Wang ◽  
Chen-Han Jan ◽  
Jaw-Luen Tang ◽  
Wei-Te Wu ◽  
Der-Cheng Chen ◽  
...  
2022 ◽  
Vol 20 (1) ◽  
pp. 011202
Author(s):  
Xiren Jin ◽  
Zeju Rui ◽  
Zihang Xiang ◽  
Chupeng Lu ◽  
Shuo Zhang ◽  
...  

2011 ◽  
Vol 71-78 ◽  
pp. 4407-4410 ◽  
Author(s):  
Jian Neng Wang ◽  
Jaw Luen Tang ◽  
Chen Han Jan ◽  
Wei Te Wu ◽  
Chien Hsing Chen ◽  
...  

This paper presents the development and assessment of a liquid-level sensor using reflective long-period fiber grating (LPFG) technology. The LPFG was fabricated by the electrical arc discharge method and the liquid-level sensor consisted of five LPFGs in series with a reflective mirror (end) coated with silver by Tollen’s test. The experimental findings showed the sensor could be used to automatically monitor five liquid levels, such as 20, 40, 60, 80, and 100 cm. The sensing system had at least 100-cm liquid-level measurement capacity. The reflective LPFGs-in-series sensor was able to successfully yield a comparable liquid-level sensing performance and hopefully could be used in the fields of civil and agronomy engineering applications such as pipes, channels, dams, and deep-ponding paddy fields.


2014 ◽  
Author(s):  
Satoshi Tanaka ◽  
Osamu Tsukida ◽  
Makoto Takeuchi ◽  
Shingo Tekuramori ◽  
Ryotaro Uchimura ◽  
...  

2012 ◽  
Vol 507 ◽  
pp. 30-33
Author(s):  
Xue Jun Zhang ◽  
Hong Tao Guo

Simultaneous measurement of strain and temperature was demonstrated by using a long-period fiber grating inscribed on a polarization-maintaining fiber. This paper analyses the intersect senstive questions in terms of strain and temperature of fiber optic cable material. It also proposes a new way to carry out simultaneous measurements of strain and temperature. Experimental results show mean square deviations of 15.6 με and 0.7°C for strain and temperature, respectively.


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