Monitoring camera system that detects out-of phase and has compensation function and the method that detects out-of phase and compensates thereof

The surveillance system detects the step-out and having a correction function is provided. According to an aspect of the invention, it detects the step-out, and having a correction function surveillance system driving unit for driving the motor to rotate the camera to the left or right, or tilt, and arranged to rotate by the motor, the outer side has a plurality of slots and that the projection is formed between them, the slots and the projections are the sensors that are arranged to each other detects the slot or the start and end positions of the projection formed on the sensing member, the sensing member is formed to have a different angular region, and the slots or the protrusions of between a starting position and an end position detecting the pulse applied to the motor, and by comparing the detected pulse values ​​and the reference pulse value, choose the appropriate slot or projection by the sensor and, by placing the sensitive member in the selected slot or the start or end position of the projections initial It may include a screen control unit to.