Photoelectric sensor and control method thereof

A control method of a photoelectric sensor, adapted to control the photoelectric sensor, wherein the photoelectric sensor comprises a driving pulse generating unit, a light-emitting part, a light receiving part, an output unit and a control unit, the control method of the photoelectric sensor comprising:

• a driving pulse generating step for generating a driving pulse of different cycles by the driving pulse generating unit;
• a light-emitting step for receiving the driving pulse by the light-emitting part to emit a light corresponding to the driving pulse;
• a light receiving step for receiving the light which is from the light-emitting part and reflected by a detected object by the light receiving part, so as to generate a light receiving signal;
• an output step for processing the light receiving signal by the output unit to output a detection signal;
• and
• a driving pulse determination step for controlling the driving pulse generating unit by the control unit to generate a first driving pulse of a sleep cycle in usual, wherein the control unit is triggered by a variation of the detection signal to control the driving pulse generating unit to generate a specified number of second driving pulses of a duty cycle, the duty cycle is formed by two or more specific cycles with different lengths, and an average of the two or more specific cycles is taken as a value of the duty cycle, and the duty cycle is shorter than the sleep cycle.