An intelligent chip assisted cable fault accurate positioning system and cable

Abstract

The application relates to the field of power cable fault monitoring, and discloses an intelligent chip-assisted cable fault accurate positioning system and a cable. The system comprises a test host and micro-control nodes distributed along the cable. The system is provided with a pulse transceiving module, a reference acquisition module, a centroid extraction module, a wave speed calibration module, a dynamic window opening module and a positioning calculation module. The micro-control nodes are pre-implanted in the cable. The system constructs a local physical baseline, acquires a centroid timestamp and calculates a real-time local wave speed. In combination with a dynamic integral time window for intercepting a reflected wave feature, an absolute position coordinate of a target is synthesized. By constructing the local physical baseline, the absolute time synchronization error between the distributed nodes is eliminated. By utilizing a dynamic window opening mechanism, the wave speed change caused by cable medium aging and wave form dispersion are adaptively solved. The feature extraction instability problem caused by a fixed window is solved, and the absolute accuracy of fault positioning is improved.

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