System and method for automatically detecting flatness of T-shaped guide rail of elevator

The invention discloses a system and method for automatically detecting the flatness of a T-shaped guide rail of an elevator. The system comprises a computer, a motion control board card, a servo driver, two servo motors, a two-dimensional laser sensor, a digital I/O board card, feeding trolleys, the T-shaped guide rail of the elevator, and conveying guide rails. The computer transmits a control signal to the second servo motor through the digital I/O board card, and the feeding trolleys drive the T-shaped guide rail of the elevator to move along the conveying guide rails. The digital I/O board card reads displacement signals of the feeding trolleys to the computer, and the computer sends a stop signal to the second servo motor during arrival at a detection position. The computer outputs a pulse quantity to the motion control board card, converts the pulse quantity into an input pulse signal of a servo driver, controls the first servo motor to work and enables the two-dimensional laser sensor to arrive at a d