Reflective Spiral Plastic Fiber-Optic Sensor for Accurate Detection of Liquid Level

Junlian Chen; Linyang Li; xin Xin; Fei Peng; Qiuhui Yu; Nianbing Zhong; Mingfu Zhao

doi:10.3788/AOS202242.0106005

Acta Optica Sinica, Volume. 42, Issue 1, 0106005(2022)

Reflective Spiral Plastic Fiber-Optic Sensor for Accurate Detection of Liquid Level

Junlian Chen^1,2, Linyang Li^1,2, xin Xin^1,2, Fei Peng^1,2, Qiuhui Yu^1,2, Nianbing Zhong^1,2,3、*, and Mingfu Zhao^1,2

¹Chongqing Key Laboratory of Optical Fiber Sensor and Photoelectric Detection, School of Electrical Engineering, Chongqing University of Technology, Chongqing 400054, China

²Chongqing Engineering Research Center of Intelligent Optical Fiber Sensing Technology, School of Electrical Engineering, Chongqing University of Technology, Chongqing 400054, China

³Liangjiang International College, Chongqing University of Technology, Chongqing 401135, China

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Figures & Tables(9)

Fig. 1. Schematic diagrams of encapsulation device and light transmission in reflective fiber-optic sensor. (a) Schematic diagram of encapsulation device; (b) schematic diagram of light transmission

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Fig. 2. Schematic diagram of reflective fiber-optic liquid level detection experimental system

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Fig. 3. Schematic diagram of light transmission in bending side-emitting optical fiber

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$Dynamic response characteristics of sensors with different optical fiber cladding refractive indexes to different working media in simulation. (a) Relationship between h and MRCTLI when n2=1.30; (b) relationship between h and MRCTLI when n2=1.37; (c) relationship between h and MRCTLI when n2=1.40; (d) relationship between n2 and MRCTLI when h=20 cm$

Fig. 4. Dynamic response characteristics of sensors with different optical fiber cladding refractive indexes to different working media in simulation. (a) Relationship between h and M_RCTLI when n₂=1.30; (b) relationship between h and M_RCTLI when n₂=1.37; (c) relationship between h and M_RCTLI when n₂=1.40; (d) relationship between n₂ and M_RCTLI when h=20 cm

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$Dynamic response characteristics of sensors with different optical fiber cladding refractive indexes to different working media in experiment. (a)--(c) Relationship between h and MRCTLI; (d)--(f) relationship between nm and MRCTLI$

Fig. 5. Dynamic response characteristics of sensors with different optical fiber cladding refractive indexes to different working media in experiment. (a)--(c) Relationship between h and M_RCTLI; (d)--(f) relationship between n_m and M_RCTLI

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Fig. 6. Effect of pitch on sensor performance under different screw diameters. (a) screw diameter is 8 mm; (b) screw diameter is 12 mm

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Fig. 7. Dynamic response characteristics of sensor to liquid level. (a) Response characteristics of sensor in case of liquid level rising and falling; (b) dynamic response stability of sensor

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Fig. 8. Dynamic response characteristics of sensor before and after temperature compensation. (a) Before temperature compensation; (b) after temperature compensation

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Table 1. Numerical simulation parameters
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Table 1. Numerical simulation parameters
Parameter n₁ k A B α_a c /m H /m a /m r /m d /m x /m
Value 1.49 1.3 0.3 0.1 0.005 0.06 0.5 0.004 0.0025 0.0001 0.001

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Junlian Chen, Linyang Li, xin Xin, Fei Peng, Qiuhui Yu, Nianbing Zhong, Mingfu Zhao. Reflective Spiral Plastic Fiber-Optic Sensor for Accurate Detection of Liquid Level[J]. Acta Optica Sinica, 2022, 42(1): 0106005

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