System for making dimensional measurements using camera-based positioning approach

摘要

A measurement system for measuring the bore inner diameter of an automotive engine block. The measurement system measures dimensions of bores AO to A3 in an engine block 10 conveyed on a transport conveyor 2. The measurement system includes: a CCD camera positioned above the transport conveyor 2; an air micrometer for measuring dimensions; a movement system for relatively moving the CCD camera and the air micrometer with respect to the transport conveyor 2; and a controller (5, Fig.4) for performing control thereof. The controller captures by way of the CCD camera, the bore AO and the side surface A of the engine block 10 conveyed on the transport conveyor 2, identifies the positions of the remaining bores A1 to A3 in the engine block 10 based on the captured images, and brings the micrometer into proximity to the bores AO to A3 for dimensional measurement.