CAN bus based water leakage alarm device for large underwater autonomous unmanned vehicle

The utility model provides a CAN bus based water leakage alarm device for large underwater autonomous unmanned vehicle. The device includes a central control unit and detection nodes. Detection nodes are arranged on the place required water leakage state detection; each detection node and the central control unit are respectively connected with a CAN bus; the detection nodes are stored with own CAN bus address for self water leakage alarm detection and further determination on the detection results; and when self water leakage occurs, water leakage information containing CAN bus address is generated and sent to the central control unit through the CAN bus. The central control unit and multiple detection nodes of the utility model are respectively connected with the CAN bus, and water leakage state of multiple nodes can be simultaneously detected; due to high real-time communication performance between each detection node on the CAN bus and central control unit, the water leakage alarm information can be transmitted to the central control unit on a real-time basis.