External rotation 3d lidar device and simultaneous localization and mapping (slam) method thereof

An external rotation 3D lidar device, comprising:

• a processor,
• a hybrid solid-state lidar,
• a camera,
• a slip ring,
• a coupling,
• a stepper motor,
• a pulse generator,
• buck modules,
• a power distribution board,
• a power supply, and
• a motor drive, wherein
• the processor is mounted above the hybrid solid-state lidar and is configured to receive real-time data of the hybrid solid-state lidar;
• the camera is fixedly mounted on one side of the hybrid solid-state lidar and is configured to record videos;
• the stepper motor and the slip ring are both connected to the hybrid solid-state lidar via the coupling, that is, the stepper motor, the slip ring, the coupling, and the hybrid solid-state lidar form a rotating mechanism;
• the pulse generator is configured to control the motor drive and accordingly control the stepper motor;
• power provided by the power supply is split by the power distribution board into four paths, two of the four paths being configured for powering the pulse generator and the motor drive, and other two of the four paths being configured for powering the processor and the hybrid solid-state lidar through the buck modules and the slip ring.