Ms. Xiaojun Yang Profile

Xiaojun Yang

at Beijing Institute of Aerospace Control Devices

SPIE Involvement:

Author

Publications (19)

Proceedings Article | 18 March 2024 Paper

Structural deformation monitoring based on distributed fiber optic sensors

Ying Mei, Xiaojun Yang, Rui Du, Yisong Zhang, Ruiyan Li, Xuechao Tian

Proceedings Volume 13104, 131046Q (2024) https://doi.org/10.1117/12.3023848

KEYWORDS: Deformation, Fiber optics sensors, Explosives, Fiber optics tests, Fiber optics, Structural monitoring, Optical testing, Laser frequency, Engineering, Distance measurement

Read Abstract +

Proceedings Article | 18 March 2024 Paper

Research on gas concentration measurement under intrusive damage testing

Huajie Wu, Yifan Wang, Ao Zhang, Yisong Zhang, Jun Shen, Rui Du, Xuechao Tian

Proceedings Volume 13104, 131044P (2024) https://doi.org/10.1117/12.3023627

Read Abstract +

Protective engineering structures are designed to withstand and mitigate the effects of penetration explosions. However, such explosions can generate a variety of toxic gases, including TVOC, CO₂, CO, HCHO, C₆H₆, NH₃, Rn, NO_x, PM_2.5, PM₁₀ and etc. The presence of these toxic gases poses a significant threat to the health and safety of personnel within these structures. Therefore, it is crucial to have timely knowledge of the changing concentrations of toxic gases during penetration explosions in order to effectively minimize harm to occupants. To address this issue, a method is proposed to monitor the concentration of toxic gases in real time during penetration explosions in protective engineering structures. The first step involves eliminating the influence of the explosion itself by using nylon ropes to fill the target projectile. This ensures that the focus is solely on monitoring the toxic gas emissions resulting from the penetration process.

Next, a comprehensive monitoring system is implemented to measure the concentrations of various toxic gases. This system utilizes advanced sensors and detectors capable of detecting TVOC, CO₂, CO, HCHO, C₆H₆, NH₃, Rn, NO_x, PM_2.5, PM₁₀ and etc. The sensors are strategically placed within the protective engineering structure to provide accurate and representative measurements. promptly relays the information to a centralized control center. This enables personnel responsible for the safety of the structure to monitor the changing gas concentrations and take appropriate measures to protect occupants. For example, if the concentration of a particular toxic gas exceeds a predetermined threshold, an alarm can be triggered, prompting immediate evacuation or the activation of ventilation systems to mitigate the risks. By implementing this real-time monitoring system, the potential harm caused by toxic gases during penetration explosions in protective engineering structures can be effectively minimized. The ability to promptly detect and respond to changes in gas concentrations ensures the safety and well-being of personnel within these structures. This research contributes to the advancement of protective engineering practices and provides valuable insights for the design and operation of structures in high-risk environments.

Proceedings Article | 18 December 2023 Paper

A distributed Brillouin dam health monitoring scheme based on differential pulse pairs

Ruiyan Li, Xiaojun Yang, Xuan Zheng, Liang Pan, Rui Du, Ying Mei

Proceedings Volume 12968, 1296811 (2023) https://doi.org/10.1117/12.3006419

KEYWORDS: Pulse signals, Spatial resolution, Signal detection, Picosecond phenomena, Signal to noise ratio, Optical fibers, Demodulation

Read Abstract +

Proceedings Article | 18 December 2023 Paper

Research on Brillouin optical time domain reflection technology based on slope assistance

Xuan Zheng, Xiaojun Yang, Ruiyan Li, Liang Pan, Xuefei Bai, Ying Mei, Rui Du

Proceedings Volume 12968, 129680W (2023) https://doi.org/10.1117/12.3005389

KEYWORDS: Demodulation, Temperature metrology, Spatial resolution, Pulse signals, Frequency response, Data processing, Time-frequency analysis, Signal detection

Read Abstract +

Proceedings Article | 18 December 2023 Paper

Application of distributed optical fiber temperature sensing technology in cable safety monitoring

Rui Du, Xiaojun Yang, Yong Yang, Chaoshuai Fu, Chang Tian, Xiaoping Wang, Shihui Luo

Proceedings Volume 12968, 129680Y (2023) https://doi.org/10.1117/12.3005924

KEYWORDS: Safety, Optical sensing, Optical fibers, Raman scattering, Temperature distribution, Rayleigh scattering, Light scattering, Sensing systems, Temperature metrology, Signal intensity

Read Abstract +

Proceedings Article | 27 March 2022 Paper

Recent improvement on spatial resolution enhanced distributed temperature sensors

Liang Pan, Xiaojun Yang, Ruiyan Li, Xuefei Bai, Yong Yang

Proceedings Volume 12169, 121697C (2022) https://doi.org/10.1117/12.2624991

KEYWORDS: Spatial resolution, Raman scattering, Temperature sensors, Data acquisition, Avalanche photodetectors, Raman spectroscopy, Pulsed laser operation, Sensors, Laser scattering, Resolution enhancement technologies

Read Abstract +

Proceedings Article | 27 March 2022 Paper

Distributed temperature monitoring of a pumped-storage power station rockfill dam using optical fiber sensors

Ruixin Liang, Ying Mei, Xiaojun Yang, Jinlong Xu, Junjia Zhang, Qianfeng Qin

Proceedings Volume 12169, 121693E (2022) https://doi.org/10.1117/12.2623731

KEYWORDS: Temperature metrology, Fiber optics sensors, Optical fibers, Sensors, Sensing systems, Optical fiber cables, Optical testing, Fiber optics, Safety, Roads

Read Abstract +

Proceedings Article | 24 November 2021 Paper

A dam health monitoring scheme based on distributed Brillouin

Ruixin Liang, Ruiyan Li, Zhifeng Chen, Yu Zhang, Deng Pan, Ying Mei, Xiaojun Yang

Proceedings Volume 12062, 120620J (2021) https://doi.org/10.1117/12.2606200

KEYWORDS: Optical fiber cables, Optical fibers, Optical sensing, Light scattering, Scattering, Optical testing, Fiber optics sensors, Sensing systems, Demodulation, Temperature metrology

Read Abstract +

Proceedings Article | 24 November 2021 Paper

Overview and prospect of dam deformation monitoring technology

Qianfeng Qin, Xuefei Bai, Jingnan Sun, Fang Li, Jiajing Zhu, Ying Mei, Xiaojun Yang

Proceedings Volume 12065, 1206534 (2021) https://doi.org/10.1117/12.2606850

KEYWORDS: Global Positioning System, Safety, 3D scanning, Laser applications, Optical fibers, Optical sensing, Data modeling, Data acquisition, Sensors, Laser scanners

Read Abstract +

Proceedings Article | 24 November 2021 Paper

Peak search algorithm in Brillouin-based strain sensor

Ruixin Liang, Liang Pan, Zhiyong Xing, Deng Pan, Xiaojun Yang, Ying Mei

Proceedings Volume 12065, 1206535 (2021) https://doi.org/10.1117/12.2606863

KEYWORDS: Sensors, Scattering, Light scattering, Optical amplifiers, Data acquisition, Signal processing

Read Abstract +

Proceedings Article | 18 March 2021 Paper

Application research of distributed optical fiber sensing technology in nuclear island safety monitoring

Ruiyan Li, Xiaojun Yang, Rui Du, Lingbing Kong, Liang Pan, Ying Mei

Proceedings Volume 11780, 1178020 (2021) https://doi.org/10.1117/12.2590829

Read Abstract +

Proceedings Article | 5 November 2020 Paper

Functional test of hanging fiber detection and video monitor system for perimeter security

Lidong Jia, Deng Chi, Zhihang Dai, Liang Pan, Xiaojun Yang, Chaoshuai Fu, Chang Tian, Yangyang He

Proceedings Volume 11567, 115674H (2020) https://doi.org/10.1117/12.2580433

Read Abstract +

Proceedings Article | 5 November 2020 Paper

An optimization and stabilization algorithm of Brillouin shifted sidebands in BOTDA sensors

Liang Pan, Xiaojun Yang, Ying Mei, Shengli Ma, Yong Yang, Lingbing Kong

Proceedings Volume 11569, 1156902 (2020) https://doi.org/10.1117/12.2573119

KEYWORDS: Sensors, Scattering, Modulation, Light scattering, Optical amplifiers, Spatial resolution, Optimization (mathematics), Modulators, Acoustics

Read Abstract +

Proceedings Article | 12 March 2020 Paper

Temperature accuracy enhanced dual-end distributed temperature sensor employing Rayleigh compensation algorithm

Liang Pan, Xiaofei Zhu, Na Li, Xiaojun Yang, Rui Du, Chaoshuai Fu, Chang Tian, Yangyang He, Yong Yang

Proceedings Volume 11436, 1143606 (2020) https://doi.org/10.1117/12.2541204

KEYWORDS: Temperature sensors, Raman spectroscopy, Sensors, Data acquisition, Backscatter

Read Abstract +