Tiegen Liu, Kun Liu, Lin Dai, Junfeng Jiang, Jian Wang, Zhenyang Ding, Mei Sang, Haofeng Hu, Shuang Wang, Chao Xue, Jingbin Wang, Ye Deng. Research Progress of Key Technologies in Recognition Sensing for Opto-Electronic Information and Event[J]. Acta Optica Sinica, 2021, 41(1): 0106002
- Acta Optica Sinica
- Vol. 41, Issue 1, 0106002 (2021)
![Measured Rayleigh scattering and far-end Fresnel reflection with reflectivity of -14 dB from FC/PC connector for 170 km[22]](/richHtml/gxxb/2021/41/1/0106002/img_1.jpg)
Fig. 1. Measured Rayleigh scattering and far-end Fresnel reflection with reflectivity of -14 dB from FC/PC connector for 170 km[22]
![Sensing results of long range multi-point disturbance events by OFDR[24]. (a) Rayleigh scattering spectral shift characteristic; (b) V shape sunken characteristic in spatial domain](/richHtml/gxxb/2021/41/1/0106002/img_2.jpg)
Fig. 2. Sensing results of long range multi-point disturbance events by OFDR[24]. (a) Rayleigh scattering spectral shift characteristic; (b) V shape sunken characteristic in spatial domain
![Optical interference signals and disturbance locating results before and after polarization compensation[32]. (a) Before compensation; (b) after compensation](/Images/icon/loading.gif){kind=icon}
Fig. 3. Optical interference signals and disturbance locating results before and after polarization compensation[32]. (a) Before compensation; (b) after compensation
Fig. 4. Schematic diagram of fiber disturbance sensing system based on asymmetric dual Mach-Zehnder interferometers[34]
Fig. 5. Schematic diagram of distributed acoustic sensing system combining double chirped-pulse and WFBGs[41]
Fig. 6. Beat frequency signal and phase demodulation results at about 101 km[41]. (a) 3D spatial-temporal profile; (b) signal power spectrum; (c) signal demodulation result of sensing position 1; (d) signal demodulation result of sensing position 2
Fig. 7. Signals of six intrusion events of waggling fence, cutting fence, climbing fence, knocking cable, crashing fence, and kicking fence[50]
Fig. 8. Image event locating of color video when irradiancy of natural light is 0.0001 lx using superstar optical image recognition technology. (a) Common camera; (b) Tiandy superstar camera
Fig. 9. Performance of imaging event pattern recognition. (a) Human faces; (b) climbing; (c) gathering
Fig. 10. Distance-time distribution of refraction index in diffusion process of glycerol solution[65]
Fig. 11. Opto-electronic information fusion recognition sensing
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