A5054189015- Advanced Fiber Optic Sensors
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Structural Health Monitoring Techniques
- Acoustic Wave Resonator Technologies
- Fluid Dynamics and Turbulent Flows
- Optical Systems and Laser Technology
- Advanced Fiber Laser Technologies
- Advanced MEMS and NEMS Technologies
- Ultrasonics and Acoustic Wave Propagation
- Computational Fluid Dynamics and Aerodynamics
- Combustion and flame dynamics
Northwest Institute of Nuclear Technology
2022-2024
Optical strain sensors [optical fiber (OFS] based on optical frequency domain reflection (OFDR) are an sensor with great application value and the ability to achieve distributed detection. However, both external ambient temperature contribute shift of Rayleigh scattering spectrum in during measurement. This means that problem compensation (TC) must be considered when detecting environment field, especially high-temperature environment. In this article, a method double-wire-based single was...
The real-time monitoring of strain processes that can simultaneously realize a wide range and high spatial resolution has always been huge challenge cannot be satisfied by traditional electrical non-contact measurement methods. In this article, the OFDR collocated with weak reflection FBG sensor (WRFBGs) was proposed to actively carry out multiple experiments on non-standard reinforcement samples complex in order overcome challenge. According result analysis, variation law surface sample...
The distributed strain measurement of special complex structures (R-type structures) has always been a significant challenge, as traditional methods such electronic and ultrasonic detection are insufficient. This paper utilizes the high-precision, high-resolution, blind-spot-free achieved through application optical frequency domain reflectometry (OFDR) fiber optic technology. By developing OFDR information demodulation algorithms selecting Gagelength values different sizes, accurate sensing...
As the basic application of fiber optic sensing technology, strain measurement accuracy as a key index needs to be further calibrated and analyzed. In this paper, calibration experiments related analyses two fiber-optic technologies, grating (FBG) optical frequency domain reflectometry (OFDR), are carried out using standard beam equal strength mature resistive gauge (ESG). The single-point data for loading unloading changes beams show good continuity linearity, with cyclic stability, error...
The precise evaluation of micro-crack sizes and locations is crucial for the safe operation structures. Traditional detection techniques, however, suffer from low spatial resolution, making it difficult to accurately locate micrometer-scale cracks. A method experimental study were proposed in this paper identifying locating micro-cracks using optical fiber strain sensing based on OFDR address issue. feasibility was verified by combination a polyimide-coated (PISOF) tight sheath (TSSOF)....