High speed position feedback servo control system based on bar code discrimination

The invention relates to a high speed position feedback servo control system based on bar code recognition, comprising a photoelectric encoder (1), a controlled object bar code (2), an electric eye (3), a code read/code system (4) and a servo control system(5), wherein the circumference of the photoelectric encoder (1) is same as the length of a standard sealing package, an angle code value for zero picture error is found by repeated tests, which is a constant value in production as the preset input value of the servo control system. The invention is characterized in that: the electric eye (3) reads and sends the bar code of the controlled object to the code read/decode system (4); after success decoding, the angle code value of the photoelectric encoder (1) is collected, the preset value and the collected angle code value are input into the servo system (5); after attaining an error, an output control variable is obtained by a two-mode control algorism. The invention has high accuracy, reliable operation and