Mobile Robot

A mobile robot, comprising:

• a body and a drive system, the drive system being connected to the body and configured to drive a movement of the mobile robot;
• a light emitter carried by the body and configured to emit light toward a surface to be detected;
• a photoelectric sensor carried by the body and responsive to light from an environment and/or emitted by the light emitter;
• a variable impedance unit connected to the photoelectric sensor and configured to have a reduced impedance when the photoelectric sensor is responsive to light of a preset intensity;
• and
• a control unit configured to adjust the light emitter to form at least two operating states in which light is emitted at different intensities, wherein in the operating state other than a last operating state, if a sampling difference value determined when the light emitter is in an OFF state and in an ON state does not satisfy a preset condition, an operating state of the light emitter is changed to prevent occurrence of a misjudgment causing the mobile robot to perform an unexpected action.