Scanning type structured light projection system and control method thereof

The invention provides a scanning type structured light projection system and a control method thereof. The system comprises a laser light source, a micro torsion mirror, a feedback module, and a control module. A laser ray enters along a direction parallel to a rotation axis of the micro torsion mirror; and after the incident laser ray is reflected by the rotated micro torsion mirror, two-dimensional structured light projection is formed. The feedback module connected with the micro torsion mirror is used for collecting a vibration frequency and position of the micro torsion mirror. The input terminal of the control module is connected with the output terminal of the feedback module and is used for receiving a signal from the feedback module; and the output terminal of the control module is connected with the laser light source and the micro torsion mirror and is used for controlling the motion of the micro torsion mirror and a luminous power of the laser light source. Therefore, under the circumstance that the micro torsion mirror has the same torsion angle, the laser light source outputs the same luminous power.