1 results about "Constant linear velocity" patented technology

This invention discloses an online inspection system and method for printed circuit board (PCB) apertures, specifically comprising: a platform for undisturbed, uniform-speed transmission, used to carry and drive the PCB through the inspection station at a constant linear velocity; a high-resolution incremental photoelectric encoder coaxially and directly connected to the drive shaft end of the platform, used to output differential pulse signals that strictly correspond to the absolute displacement of the PCB in real time; a non-transparent, dual-telecentric optical module, vertically mounted directly above the inspection station, with an optical distortion rate of less than 0.05%; the optical module is equipped with a large-area global exposure industrial camera, used to eliminate visible artifacts on the inner wall of the aperture at the edge of the field of view caused by the perspective angle; the printed circuit boards of this invention can flow through the inspection machine at extremely high speeds. The production capacity of one machine is equivalent to ten traditional stop-and-go automatic optical inspection machines, greatly reducing the depreciation costs of factory equipment.