Deep-sea mining lifting pipeline detection device based on buoyancy adjustment and control method thereof

The invention discloses a deep-sea mining lifting pipeline detection device based on buoyancy adjustment and a control method thereof.The deep-sea mining lifting pipeline detection device comprises a peripheral frame, a plurality of buoyancy adjusting structures are arranged between an upper connecting plate and a lower connecting plate of the peripheral frame, and a support and a plurality of electronic sealing cabins are installed on the lower connecting plate; a detection sensor and a water depth sensor are installed on the support, the buoyancy adjusting structure comprises a sealed cabin, a hydraulic system is installed in the sealed cabin, an oil bag is arranged at the top of the sealed cabin and connected with the hydraulic system, and therefore device heaving is achieved, and an underwater acoustic communicator and a control unit are arranged in the electronic sealed cabin. The control unit is connected with the buoyancy adjusting structure, the water depth sensor, the detection sensor and the underwa