Data Reduction in Phase-Sensitive OTDR with Ultra-Low Sampling Resolution and Undersampling Techniques

Yu, Feihong1; Shao, Liyang1,2; Liu, Shuaiqi1,3; Xu, Weijie1; Xiao, Dongrui1; Liu, Huanhuan1; Shum, Perry Ping1

2022-09-01

10.3390/s22176386

SENSORS   Impact Factor & Quartile

1424-8220

Data storage is a problem that cannot be ignored in the long-term monitoring of a phase-sensitive optical time-domain reflectometry (phi-OTDR) system. In this paper, we proposed a data-reduction approach for heterodyne phi-OTDR using an ultra-low sampling resolution and undersampling techniques. The operation principles were demonstrated and experiments with different sensing configurations were carried out to verify the proposed method. The results showed that the vibration signal could be accurately reconstructed from the undersampled 1-bit data. A space saving ratio of 98.75% was achieved by converting 128 MB of data (corresponding to 268.44 ms of sensing time) to 1.6 MB. The proposed method led to a potentially new data-reduction approach for heterodyne phi-OTDR, which also provided economical guidance for the selection of the data-acquisition device.

phase-sensitive optical time-domain reflectometry distributed acoustic sensing data reduction ultra-low sampling resolution undersampling

SCI ; EI

English

First ; Corresponding

Department of Natural Resources of Guangdong Province["GDNRC [2022]","22"] ; Guangdong Science and Technology Department[2021A0505080002] ; Stable Support Program for Higher Education Institutions from Shenzhen Science, Technology & Innovation Commission[20200925162216001] ; Special Funds for the Major Fields of Colleges and Universities by the Department of Education of Guangdong Province[2021ZDZX1023] ; Natural Science Foundation of Guangdong Province[2022A1515011434]

Chemistry ; Engineering ; Instruments & Instrumentation

Chemistry, Analytical ; Engineering, Electrical & Electronic ; Instruments & Instrumentation

WOS:000851793300001

MDPI

20223812749905

Air navigation ; Data acquisition ; Digital storage ; Heterodyning ; Reflection ; Reflectometers ; Time domain analysis

Air Navigation and Traffic Control:431.5 ; Data Storage, Equipment and Techniques:722.1 ; Data Processing and Image Processing:723.2 ; Mathematics:921 ; Optical Instruments:941.3

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
2.Peng Cheng Lab, Shenzhen 518005, Peoples R China
3.Univ Macau, State Key Lab Analog & Mixed Signal VLSI, Macau 999078, Peoples R China

Yu, Feihong,Shao, Liyang,Liu, Shuaiqi,et al. Data Reduction in Phase-Sensitive OTDR with Ultra-Low Sampling Resolution and Undersampling Techniques[J]. SENSORS,2022,22(17).

Yu, Feihong.,Shao, Liyang.,Liu, Shuaiqi.,Xu, Weijie.,Xiao, Dongrui.,...&Shum, Perry Ping.(2022).Data Reduction in Phase-Sensitive OTDR with Ultra-Low Sampling Resolution and Undersampling Techniques.SENSORS,22(17).

Yu, Feihong,et al."Data Reduction in Phase-Sensitive OTDR with Ultra-Low Sampling Resolution and Undersampling Techniques".SENSORS 22.17(2022).