Faxiang Zhang
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View article: Distributed acoustic sensing signal event recognition and localization based on improved YOLOv7
Distributed acoustic sensing signal event recognition and localization based on improved YOLOv7 Open
The distributed acoustic sensing (DAS) system based on phase-sensitive optical time domain reflection ( Φ-OTDR) technology is widely used in pipeline safety monitoring, perimeter security, structure monitoring, etc. Accurate localization a…
View article: Feature fusion-based fiber-optic distributed acoustic sensing signal identification method
Feature fusion-based fiber-optic distributed acoustic sensing signal identification method Open
Fiber-optic distributed acoustic sensing (DAS) systems based on phase-sensitive optical time-domain reflection technology have been widely used for perimeter security and oil and gas pipeline safety monitoring. To address the problem of lo…
View article: Monitoring the Opening of Rapid Palatal Expansion (RPE) in a 3D-Printed Skull Model Using Fiber Optic F–P Sensors
Monitoring the Opening of Rapid Palatal Expansion (RPE) in a 3D-Printed Skull Model Using Fiber Optic F–P Sensors Open
We present a novel method for the online measurement of multi-point opening distances of midpalatal sutures during a rapid palatal expansion (RPE) using fiber optic Fabry–Perot (F–P) sensors. The sensor consists of an optical fiber with a …
View article: Monitoring the Opening of Rapid Palatal Expansion (RPE) in a 3D Printed Skull Model Using Fiber Optic F-P Sensors
Monitoring the Opening of Rapid Palatal Expansion (RPE) in a 3D Printed Skull Model Using Fiber Optic F-P Sensors Open
We present a novel method for online measurement of multi-point opening distances of midpalatal suture during rapid palatal expansion (RPE) using fiber optic Fabry-Perot (F-P) sensors. The sensor consists of an optical fiber with a cut fla…
View article: Air-Water Cross-Medium Communication Improved by Laser-Generated Sound Combined with Pulse Position Modulation
Air-Water Cross-Medium Communication Improved by Laser-Generated Sound Combined with Pulse Position Modulation Open
View article: Distributed Optical Fiber Sensing Event Recognition Based on Markov Transition Field and Knowledge Distillation
Distributed Optical Fiber Sensing Event Recognition Based on Markov Transition Field and Knowledge Distillation Open
We propose a distributed optical fiber sensing event recognition scheme based on Markov Transition Field (MTF) and knowledge distillation. The event recognition algorithm has the advantages of being lightweight, fast, and high accuracy. Th…
View article: Development and Application of Fiber Optic Laser Microseismic Sensor Based on Response Characteristics of Tunnel Water Inrush
Development and Application of Fiber Optic Laser Microseismic Sensor Based on Response Characteristics of Tunnel Water Inrush Open
View article: Real-time monitoring of pressure and temperature of oil well using a carbon-coated and bellow-packaged optical fiber sensor
Real-time monitoring of pressure and temperature of oil well using a carbon-coated and bellow-packaged optical fiber sensor Open
A carbon-coated and bellow-packaged optical fiber sensor for high pressure and high temperature monitoring in downhole applications is developed and successfully field-applied in an oil well. Carbon-coating and bellow-packing techniques ar…
View article: Optical Fiber Fabry-Perot Pressure Sensor with Silver-coated Surface
Optical Fiber Fabry-Perot Pressure Sensor with Silver-coated Surface Open
To meet the need of the pressure measurement in high temperature oil wells, an extrinsic optical fiber Fabry-Perot(F-P) pressure sensor on the surface of silver coating realized by physical vapor deposition is developed. The F-P cavity sen…
View article: Development of three-component fiber laser geophone array system and field test analysis
Development of three-component fiber laser geophone array system and field test analysis Open
© 2019 SPIE. In this paper we report the development and field test of a high sensitivity 3C fiber laser geophone for seismic acquisition application. When the fiber laser geophone senses the seismic signal, its output wavelength is propor…
View article: Study on the Characters of Phase-Shifted Fiber Bragg Grating in Asymmetric Perturbation and Its Application in Fiber Laser Acoustic Sensor
Study on the Characters of Phase-Shifted Fiber Bragg Grating in Asymmetric Perturbation and Its Application in Fiber Laser Acoustic Sensor Open
A π phase-shifted fiber Bragg grating theoretical model is established, and the effects of an asymmetric and symmetrical perturbation field on a phase-shifted fiber Bragg grating are investigated in this paper. The trends of wavelength shi…
View article: Short cavity DFB fiber laser based vector hydrophone for low frequency signal detection
Short cavity DFB fiber laser based vector hydrophone for low frequency signal detection Open
A short cavity distributed feedback (DFB) fiber laser is used for low frequency acoustic signal detection. Three DFB fiber lasers with different central wavelengths are chained together to make three-element vector hydrophone with proper s…
View article: Research on the surface subsidence monitoring technology based on fiber Bragg grating sensing
Research on the surface subsidence monitoring technology based on fiber Bragg grating sensing Open
View article: Application of Optical Fiber Sensing Technology in Offshore Platform Structure Monitoring
Application of Optical Fiber Sensing Technology in Offshore Platform Structure Monitoring Open
With increasing service life of offshore platform, the platform components have different degrees of damage and aging.In order to ensure the safety of offshore platform, the structure monitoring need to be implemented.The optical fiber sen…