Small Sample Fiber Full State Diagnosis Based on Fuzzy Clustering and Improved ResNet Network

Table 1

Classification and analysis of OTDR curves for different status of fibers.

Code	Running state	Curve types	Curve characteristic
f0	Healthy	Normal OTDR curve	The curve has a sharp peak at the beginning and end, and becomes flat in the middle of it
f1	Subhealthy	The cable is overbent	There are “small steps” in the middle
f2		The bending radius of the cable is rather small	The curve fluctuates in the intermediate stage
f3		The breakpoint is too close to the test point or in a blind spot	The curve has no middle flat stage and no end peak
f4	Fault	Fiber break	A large peak appeared in the middle flat stage of the curve
f5		Dirty on the end of the cable or poor quality on the end of the surface	There is no reflection spike at the end of the curve