scholarly journals An Optimized PDMS Thin Film Immersed Fabry-Perot Fiber Optic Pressure Sensor for Sensitivity Enhancement

Coatings ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 290 ◽  
Author(s):  
Cheng Luo ◽  
Xiangnan Liu ◽  
Jinrong Liu ◽  
Jian Shen ◽  
Hui Li ◽  
...  
Keyword(s):  
Film Thickness ◽  
Pressure Sensor ◽  
Fiber Optic ◽  
Diffusion Rate ◽  
Low Cost ◽  
Viscosity Coefficient ◽  
External Pressure ◽  
Joint Surface ◽  
Pdms Film ◽  
Fabry Perot

To effectively control the critical thickness of a polydimethylsiloxane (PDMS) film and enhance the sensitivity characteristics of the fiber pressure sensor, we propose a new method to optimize the thickness of the PDMS film in a fiber tube. It is characterized by analyzing the relationship between the diffusion rate of the PDMS and its viscosity, and using an oven to solidify the PDMS to a certain extent to accurately control the diffusion rate and diffusion length of the PDMS in the fiber tube. We also used multiple transfer methods to control the volume of the PDMS in the fiber tube to minimize the thickness of the formed PDMS film. Fabry-Perot interference occurs when the surface of the PDMS film layer filled into the fiber tube and the adjacent single mode fiber/fiber tube form a joint surface. This method forms a new fiber-optic Fabry-Perot pressure sensor that is very sensitive to external pressure parameters. The experimental results show that the optimized film thickness will be reduced to an order of 20 μm. Correspondingly, the fiber-optic pressure sensor has a sensitivity of up to 100 pm/kPa, which is about 100 times that reported in the literature. The structure also has better resistance to temperature interference. To our knowledge, this is the first in-depth study of the effects of the PDMS viscosity coefficient, diffusion rate, and fiber pressure sensitivity in fiber. The film thickness optimization method has some advantages, including a low cost, good controllability, and good application value in high sensitivity pressure and sound wave detection.

scholarly journals Miniature All-Silica Microbubble-Based Fiber Optic Fabry-Perot Pressure Sensor with Pressure Leading-In Tube

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Huixin Zhang ◽  
Jia Liu ◽  
Jiashun Li ◽  
Pinggang Jia ◽  
Fei Feng ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Coefficient ◽  
Pressure Sensor ◽  
Room Temperature ◽  
Fiber Optic ◽  
Single Mode ◽  
External Pressure ◽  
Compact Structure ◽  
Fabry Perot ◽  
Length Changes

A novel all-silica fiber optic Fabry-Perot (FP) pressure sensor with pressure leading-in tube based on microbubble structure is developed and experimentally demonstrated. The FP cavity is formed by fixing the end face of the single-mode fiber (SMF) parallel to the outer surface of the microbubble, in which the microbubble with a diameter of about 318 μm is constructed at the end of silica hollow tube. When external pressure is transmitted on the inner surface of the microbubble by the pressure leading-in tube, the FP cavity length changes with the diameter of microbubble. Experimental results show that such a sensor has a linear sensitivity of approximately 4.84 nm/MPa at room temperature over the pressure range of 1.1 MPa; the sensor has a very low temperature coefficient of approximately 2 pm/°C from room temperature to 600°C. The sensor has advantages of extremely low temperature coefficient, compact structure, and small size, which has potential applications for measuring pressure in high-temperature environment.

Low-cost miniature fiber-optic extrinsic Fabry-Perot interferometric pressure sensor for biomedical applications

2013 ◽  
Author(s):  
Sven Poeggel ◽  
Daniele Tosi ◽  
Gabriel Leen ◽  
Elfed Lewis
Keyword(s):  
Pressure Sensor ◽  
Biomedical Applications ◽  
Fiber Optic ◽  
Low Cost ◽  
Fabry Perot

A fiber optic pressure sensor based on white-light extrinsic Fabry-Perot interferometer and fiber Bragg grating for mixed environment

2015 ◽  
Author(s):  
Le Yu ◽  
Yong Pan ◽  
Chengjun Hu ◽  
Xiaoguang Liu ◽  
Shengnan Duan ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
White Light ◽  
Pressure Sensor ◽  
Fiber Optic ◽  
Bragg Grating ◽  
Fabry Perot

scholarly journals Pressure sensor based on the fiber-optic extrinsic Fabry-Perot interferometer

2010 ◽  
Vol 1 (1) ◽  
pp. 72-83 ◽  
Author(s):  
Qingxu Yu ◽  
Xinlei Zhou
Keyword(s):  
Pressure Sensor ◽  
Fiber Optic ◽  
Fabry Perot

High-sensitivity hydraulic pressure sensor realized with PDMS film-based Fabry-Perot interferometer

2019 ◽  
Author(s):  
Leyi Hou ◽  
Ben Xu ◽  
Chun-Liu Zhao ◽  
Huifang Chen ◽  
Xinyong Dong ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
High Sensitivity ◽  
Hydraulic Pressure ◽  
Pdms Film ◽  
Fabry Perot

Fiber Optic Fabry Perot Pressure Sensor Based On Commercial Ferule

2016 ◽  
Author(s):  
D. Natale ◽  
P. Di Palma ◽  
S. Campopiano ◽  
A. Iadicicco
Keyword(s):  
Pressure Sensor ◽  
Fiber Optic ◽  
Fabry Perot

Dual Fiber-Optic Fabry–Perot Interferometer Temperature Sensor with Low-Cost Light-Emitting Diode Light Source

2008 ◽  
Vol 47 (4) ◽  
pp. 3236-3239 ◽  
Author(s):  
Mu-Chun Wang ◽  
Zhen-Ying Hsieh ◽  
Yuan-Tai Tseng ◽  
Fan-Gang Tseng ◽  
Heng-Sheng Huang ◽  
...  
Keyword(s):  
Light Source ◽  
Temperature Sensor ◽  
Fiber Optic ◽  
Light Emitting Diode ◽  
Low Cost ◽  
Light Emitting ◽  
Fabry Perot

scholarly journals A Low-Cost, Flexible Pressure Capacitor Sensor Using Polyurethane for Wireless Vehicle Detection

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1247 ◽  
Author(s):  
Chien Khong Duc ◽  
Van-Phuc Hoang ◽  
Duy Tien Nguyen ◽  
Toan Thanh Dao
Keyword(s):  
Pressure Sensor ◽  
Low Cost ◽  
Vehicle Detection ◽  
Intelligent Transportation ◽  
External Pressure ◽  
Transportation Management ◽  
The Road ◽  
Promising Tool ◽  
On The Road ◽  
Flexible Pressure Sensor

Detection of vehicles on the road can contribute to the establishment of an intelligent transportation management system to allow smooth transportation and the reduction of road accidents. Thus far, an efficient and low-cost polymer flexible pressure sensor for vehicle detection is lacking. This paper presents a flexible sensor for vehicle sensing and demonstrates a wireless system for monitoring vehicles on the road. A vehicle sensor was fabricated by sandwiching a polyurethane material between aluminum top/bottom electrodes. The sensing mechanism was based on changes in capacitance due to variation in the distance between the two electrodes at an applied external pressure. A clear response against a pressure load of 0.65 Mpa was observed, which is the same pressure as that of the car tire area in contact with the road. Significantly, the sensor was easy to embed on the road line due to its mechanical flexibility and large size. A field test was carried out by embedding the sensor on the road and crossing the sensor with a car. Moreover, the signal displayed on the tablet indicated that the sensing system can be used for wireless detection of the axle, speed, or weight of the vehicle on the road. The findings suggest that the flexible pressure sensor is a promising tool for use as a low-cost vehicle detector in future intelligent transportation management.

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