A Fiber Bragg Grating-Based Condition Monitoring and Early Damage Detection System for the Structural Safety of Underground Coal Mines Using the Internet of Things

<div>(a) Mine opening with installed wooden supports. (b) Sequence for the removal of mine wooden support during experimentation.</div>

Journal of Sensors

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Figure 9

Figure 9: A Fiber Bragg Grating-Based Condition Monitoring and Early Damage Detection System for the Structural Safety of Underground Coal Mines Using the Internet of Things 

Figure 9 | A Fiber Bragg Grating-Based Condition Monitoring and Early Damage Detection System for the Structural Safety of Underground Coal Mines Using the Internet of Things 