Research On Non-contact Measurement Technology Of Two Axes' Parallel Error For Crankshaft

Based on laser-scanning measuring technology, a laser non-contact measuring method of two axes' parallelism error for crankshaft and a parallelism error measuring system by using the liser slit scanning priciple are presented. In this paper the measuring principle , consitution and overall structure of the system are discribed. The laser slit scanning optical system is specially studied and designed, the collimating characteristics of laser scanning beams and the emergent pupil of the scanning system for mutipie-surface rotating drift mirror are discussed and analysized in detail. The formula of scanning speed is drived. The sorftwareand hardware systems of the computer communication, real-time control and data processing have been designed. The accuracy of the system is verified by experiments.The system not only achieves high precision's parallel error's inspection, but also can't damage workplace's surf ace, thus improes crankshaft' s precision of manufacture and applied efficiency. The system solves the problem of two axes' parallel error measurement and improves the level of product modernization.