Application of Smart Fiber Optic Sensor Technology in Feature Extraction, Recognition, and Detection

Figure 5

(a) The F domain waveform of the signal under the intruder-knocking behavior, (b) the F domain waveform of the signal under the intruder-climbing behavior, (c) the F domain waveform of the signal in the noise-free ambiance, and (d) the F domain waveform of the signal in the rainy environment.

(a)

(b)

(c)

(d)