Non-contact workpiece dimension measurement method and system

The invention provides a non-contact workpiece size measurement method and system, and the system comprises an optical fiber coupling semiconductor laser, an optical fiber collimating lens, a linear array CCD, a standard block/to-be-measured workpiece, an adjusting sleeve, a CCD linear array panel, an oscilloscope, a supporting rod/laser tube holder, a guide rail, an optical fiber, and a signal test line. The optical fiber coupling semiconductor laser is connected with an optical fiber collimating mirror installed on one side of the guide rail through an optical fiber, an adjusting sleeve is installed in the middle of the guide rail, a standard block/workpiece to be detected is installed on the adjusting sleeve, and a linear array CCD is installed on the other side of the guide rail. The laser emitted by the optical fiber coupling semiconductor laser in the optical fiber collimating mirror, the linear array CCD and the standard block/workpiece to be tested are kept at the same horizontal position, the linear