Fabric seam margin sensing recognition device

The invention discloses a fabric seam margin sensing recognition device. The device comprises rotating arms, synchronous rollers, a spacer, a synchronous belt pulley, an angular displacement sensor, an angular displacement bracket, a tension spring, a synchronous belt, a pressing roller and a cloth guide roller; the synchronous rollers and the cloth guide roller are both fixed to a rack, the rotating arms are arranged at both ends of each synchronous roller respectively, one end of each rotating arm is connected with the corresponding synchronous roller, and the other end of each rotating armis connected with the spacer; the spacer is provided with the pressing roller, one end of the synchronous belt is connected to one side wall of each rotating arm, the other end of the synchronous beltbypasses the synchronous belt pulley to be connected to one end of the tension spring, and the other end of the tension spring is fixed to each rotating arm; the angular displacement bracket is provided with the angular displ