Automatic tracking device

An automatic tracking device comprises a carry tool unit, a barrier sensing unit, a signal generation unit, a target unit, an angle calculating unit and a motor control unit. The carry tool unit comprises a carrier and a driving module; the barrier sensing unit comprises at least one supersonic sensing module arranged in the carrier and generating a space signal according to a sensing result; thesignal generation unit comprise antenna modules arranged in the carrier, and each antenna module emits an antenna signal; the target unit senses the antenna signals; and the angle calculating unit receives sensing results of the antenna signals and calculates distance and direction data relative to the carrier of the target unit; and the motor control unit carries out calculation according to thedistance and direction data and the space signal and drives motion of the driving module, and thus, the carry tool unit can track the target unit automatically. 种自动追踪装置，包含个载具单元、个障碍物感测单元、个信号产生单元、个目标单元、个角度计算单元及个马达控制单元，该载具单元包括个载体