Phi-OTDR-based optical cable channel construction threat event identification method

The invention provides a phi-OTDR-based optical cable channel construction threat event identification method, which comprises the steps of connecting a phi- OTDR with a one-core redundant optical fiber of a to-be-monitored optical cable, and acquiring an optical fiber signal to obtain a vibration signal; sorting the vibration signal into a two-dimensional array X according to a time space; averaging the two-dimensional array X to obtain a signal Y; denoising and normalizing the signal Y to obtain an initial signal G (i, j); extracting signal features; building a neural network training model,taking the signal feature Z (i, j) of the construction threat event as an input signal, and recognizing the type of the construction threat event near the optical cable channel through the neural network. According to the invention, all vibration information on an optical cable line can be analyzed in real time, the mechanical construction type of each threat event can be accurately analyzed, real-time early warning serv