Research On CCD-based And Automatic Measuring System For Crankshaft

By precise and automatic measurement, fewer cost and higher efficiency may be brought to the production of engine crankshaft, a key part in engine that holds complex structure and requires high precision in dimension. An overview of research concerned at home and abroad shows both advantages and disadvantages that exist in present measurements. And this paper proposes a novel method to obtain measurement information of crankshaft. That is a CCD-based automatic noncontact measuring System. With characteristic information got from image processing, exact geometric dimensions and tolerances of crankshaft of different angles are obtained rapidly, which promises qualified products. This paper illustrates the working principle and establishment of full system, gives details about mechanical structure and software that is responsible for image processing and result gaining. This new measurement solves the match problem of measuring precision and rapidity to real production. Thus it provides an efficient way to detecte crankshaft precisely and rapidly. At the same time, the CCD-based detecting way can be expanded to other applications besides engine crankshaft. It also provides a noncontact measurement to similar parts, large size especially, which settles the match problem of visual angle and precision to requirements in measuring application.