Optics and Precision Engineering, Volume. 29, Issue 11, 2581(2021)
Abnormal diagnosis of fiber Bragg grating strain gauges in health monitoring system
Figures & Tables(9)
Fig. 2. Samples after compression and filtering of measuring point example
Table 1. Failure types and characteristic change of sensors
View tableView in ArticleTable 1. Failure types and characteristic change of sensors
Types of sensors faults Eigen values Sensor stuck No change in output Constant gain Increase in output amplitude Complete failure Random output signal Open circuit No output High frequency disturbance Signal main frequency cycle offset
Table 2. Eigen values and abnormal indexes of simulated sensors
View tableView in ArticleTable 2. Eigen values and abnormal indexes of simulated sensors
Sensor number Sample length Standard deviation/nm Energy value/nm2 Main cycle/h Abnormal index Average 609 266 0.089 5.56 22.79 1.384 9 Center 630 768 0.086 4.07 19.47 - 10 157 722 0.072 0.26 43.89 6.903 3 11 630 887 0.288 48.17 19.48 8.738 4 12 630 887 0.0 0.0 0 6.414 9 13 630 887 0.101 0.59 87.64 4.928 1
Table 3. Eigen values and abnormal indexes of fault sensors
View tableView in ArticleTable 3. Eigen values and abnormal indexes of fault sensors
Sensor number Sample length Standard deviation/nm Energy value/nm2 Main cycle/h Abnormal index Average 554 120 0.089 4.08 32.98 2.317 5 Center 590 667 0.085 4.09 18.42 - 38 13 0.044 0.00 0.00 10.645 163 618 721 0.175 7.39 28.66 6.955 3 265 103 186 0.073 0.28 7.22 7.706 1 305 682 380 0.299 35.54 9.49 27.168
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Xiao SUN, Qing-mei WANG, Zhen-wei LI, Jing-jing CHU. Abnormal diagnosis of fiber Bragg grating strain gauges in health monitoring system[J]. Optics and Precision Engineering, 2021, 29(11): 2581
Paper Information
Category: Modern Applied Optics
Received: Mar. 15, 2021
Accepted: --
Published Online: Dec. 10, 2021
The Author Email: SUN Xiao (sx@qust.edu.cn)
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