Sampling Method for Similar Section Surface Inspection

Sampling is a vital step in computer aided inspection planning. This paper proposes a novel sampling method for similar section surface inspection by using tactile sensor. The method considers Gaussian curvature as surface mass density function and generates grids by dividing surface with equal surface mass. Then extended Hammersley algorithm which is extensively used in concise surface inspection sampling is applied to determine the sample point location. Simulations on typical similar section surface are performed to validate its effect. A practical case on impeller blade surface is tested. The experimental result shows that the proposed method can achieve higher inspection precise compared equaparametric method with the same sample point number.