Size Effect roughness coefficient determination method of sample characterization unit

A structure in roughness coefficient characterizing a sample size effects unit determining method, the selected good surface exposed typical rock structure as the research object, based on large-scale field topography measurement feature rock surface structure, according to the sample size and calculating the number of samples sample structure adjacent the surface roughness of the overlapping length, the coordinate information extraction surface iterative series of interviews size of the structure like; roughness coefficient calculating sample series, the overall size distribution of the sample data is Weibull distribution probability density function fitting, the roughness factor construct probability density function model structure surface size effect; relative deviation coefficient of roughness analysis and evaluation of representative samples of each structural interview sample values ​​characterizing the roughness factor of dimensions search condition the minimum value, the coefficient determining the roughness of the surface structure of the token. The present invention effectively solves the uniqueness ensure reproducibility of test results problems roughness coefficient study sample size effect selected surface structure.