Fiber-Optic Distributed Vibration Sensor for Pipeline Pre-Alarm

2014 ◽  
Vol 684 ◽  
pp. 235-239 ◽  
Author(s):  
Wen Tai Lin ◽  
Shu Qin Lou ◽  
Sheng Liang
Keyword(s):  
Time Delay ◽  
Pressure Wave ◽  
Oil And Gas ◽  
Fiber Optic ◽  
High Spatial Resolution ◽  
High Reliability ◽  
High Sensitivity ◽  
Vibration Sensor ◽  
Acoustic Detection ◽  
Wave Detection

Pipeline security is very important in oil and gas transportation. Traditional technology such as negative pressure wave detection, acoustic detection doesn’t match the need of pre-alarm. A fiber-optic distributed vibration sensor (FDVS) is proposed and investigated. It is found that the FDVS has the advantages of long sensing distance, high spatial resolution, high sensitivity, high reliability, etc. According to calculating the time delay of the two MZIs , the vibration can be located.

scholarly journals E-Skin Pressure Sensors Made by Laser Engraved PDMS Molds

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 1039 ◽  
Author(s):  
Andreia dos Santos ◽  
Nuno Pinela ◽  
Pedro Alves ◽  
Rodrigo Santos ◽  
Elvira Fortunato ◽  
...  
Keyword(s):  
Pressure Wave ◽  
Pressure Range ◽  
Low Cost ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Wave Detection ◽  
Piezoresistive Sensors ◽  
Electronic Skin ◽  
Large Pressure ◽  
Skin Pressure

This work describes the production of electronic-skin (e-skin) piezoresistive sensors, which micro-structuration is performed using laser engraved molds. With this fabrication approach, low-cost sensors are easily produced with a tailored performance. Sensors with micro-cones and a high sensitivity of −1 kPa−1 under 600 Pa are more adequate for the blood pressure wave detection, while sensors micro-structured with semi-spheres and a maximum sensitivity of −6 × 10−3 kPa−1 in a large pressure range (1.6 kPa to 100 kPa) are more suitable for robotics and functional prosthesis.

scholarly journals High-Sensitivity Cuboid Interferometric Fiber-Optic Hydrophone Based on Planar Rectangular Film Sensing

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6422
Author(s):  
Wenrui Wang ◽  
Yeye Pei ◽  
Lingyun Ye ◽  
Kaichen Song
Keyword(s):  
Fiber Optic ◽  
Simulation Analysis ◽  
High Sensitivity ◽  
Detection Sensitivity ◽  
Acoustic Detection ◽  
Frequency Range ◽  
Operating Frequency Range ◽  
Important Means ◽  
The Mean ◽  
Theoretical Pressure

Interferometric fiber-optic hydrophones are an important means in the field of underwater acoustic detection. The design of the hydrophone sensor head is the key technology related to its detection sensitivity. In this paper, a high-sensitivity cuboid interferometric fiber-optic hydrophone based on planar rectangular film sensing is proposed, and the sensitivity of the sensor is compared with that of the widely used air-backed mandrel hydrophone under the same conditions. The acoustic characteristic models of the two types of sensors were established by theoretical calculation and simulation analysis to obtain the theoretical pressure sensitivity. Some experiments were performed to examine the theory and design. According to the experiment results, the mean phase sensitivity of the mandrel type was −112.85 dB re 1 rad/μPa in the operating frequency range of 10–300 Hz, and that of the cuboid type was −84.50 dB re 1 rad/μPa. The latter was 28.35 dB higher than the former was. These results are useful for improving hydrophone sensitivity.

A novel fiber optic geophone with high sensitivity for geo-acoustic detection

2014 ◽  
Author(s):  
Zhenhui Zhang ◽  
Huayong Yang ◽  
Shuidong Xiong ◽  
Hong Luo ◽  
Chunyan Cao ◽  
...  
Keyword(s):  
Fiber Optic ◽  
High Sensitivity ◽  
Acoustic Detection

Multichannel Fiber-Optic Ring Converters for Optical Sensors of Physical Quantities

2016 ◽  
Vol 39 ◽  
pp. 221-227
Author(s):  
V. Shapar ◽  
Vladimir Lysenko ◽  
Alla V. Bondarenko
Keyword(s):  
Optical Sensors ◽  
Oil And Gas ◽  
Fiber Optic ◽  
High Sensitivity ◽  
Oil And Gas Industry ◽  
Fiber Bundles ◽  
Measuring Instruments ◽  
Explosion Safety ◽  
Gas Industry ◽  
Physical Quantities

The substantial achievements in the area of manufacturing technology for optical fiber bundles and fiber-optic transducers (FOTs) stimulated interest in their application in various sensors of physical quantities as well as in measuring instruments. Being insensitive to electromagnetic interferences, FOTs demonstrated high sensitivity to measured physical quantities. They made it possible to perform contactless measurements in many cases of hindered access to the objects under investigation. Their spark-and explosion-safety as well as manufacturing simplicity make FOT-based measuring instruments especially useful for application in coal-mining and oil-and-gas industry where the safety problems are of vital importance.

PIG tracking utilizing fiber optic distributed vibration sensor and YOLO

2021 ◽  
pp. 1-1
Author(s):  
Zhou Sha ◽  
Hao Feng ◽  
Xiaobo Rui ◽  
Zhoumo Zeng
Keyword(s):  
Fiber Optic ◽  
Vibration Sensor

High-sensitivity fiber optic magnetic field sensor based on lossy mode resonance and hollow core-offset structure

2021 ◽  
pp. 1-12
Author(s):  
Xue-Peng Jin ◽  
Hong-Zhi Sun ◽  
Shuo-Wei Jin ◽  
Wan-Ming Zhao ◽  
Jing-Ren Tang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Fiber Optic ◽  
High Sensitivity ◽  
Magnetic Field Sensor ◽  
Hollow Core ◽  
Field Sensor

scholarly journals A Full-Range Flexible and Printed Humidity Sensor Based on a Solution-Processed P(VDF-TrFE)/Graphene-Flower Composite

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1915
Author(s):  
Shenawar Ali Khan ◽  
Muhammad Saqib ◽  
Muhammad Muqeet Rehman ◽  
Hafiz Mohammad Mutee Ur Rehman ◽  
Sheik Abdur Rahman ◽  
...  
Keyword(s):  
Active Layer ◽  
Humidity Sensor ◽  
High Reliability ◽  
Full Range ◽  
High Sensitivity ◽  
Fast Response ◽  
Considerable Change ◽  
Relative Humidity Range ◽  
Response And Recovery ◽  
Proportional Relationship

A novel composite based on a polymer (P(VDF-TrFE)) and a two-dimensional material (graphene flower) was proposed as the active layer of an interdigitated electrode (IDEs) based humidity sensor. Silver (Ag) IDEs were screen printed on a flexible polyethylene terephthalate (PET) substrate followed by spin coating the active layer of P(VDF-TrFE)/graphene flower on its surface. It was observed that this sensor responds to a wide relative humidity range (RH%) of 8–98% with a fast response and recovery time of 0.8 s and 2.5 s for the capacitance, respectively. The fabricated sensor displayed an inversely proportional response between capacitance and RH%, while a directly proportional relationship was observed between its impedance and RH%. P(VDF-TrFE)/graphene flower-based flexible humidity sensor exhibited high sensitivity with an average change of capacitance as 0.0558 pF/RH%. Stability of obtained results was monitored for two weeks without any considerable change in the original values, signifying its high reliability. Various chemical, morphological, and electrical characterizations were performed to comprehensively study the humidity-sensing behavior of this advanced composite. The fabricated sensor was successfully used for the applications of health monitoring and measuring the water content in the environment.

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