木质材料表面粗糙度光学付立叶测量方法的研究

STUDY ON MEASUREMENT OF WOOD SURFACE ROUGHNESS BY FOURIER OPTICAL METHOD

阐述了木质材料表面粗糙度现有的测量技术与研究现状，研究了木质材料表面的统计模型和一维高斯型木质材料表面光学付立叶变换谱强度分布的模型，并得到了计算木质材料表面粗糙度均方根误差和自相关函数的数学公式。测量两个参数的实验系统，将具有非接触、高测量速度、测量不受被测材料影响和能得到比较多的轮廓信息等优点，进一步完善后，可用于木质材料表面粗糙度的分类检测及监控。

This paper gives a review of techniques used previously in inside country and abroad to measure wood surface roughness,and establishes a statistic model of wood surface. By means of random process theory,the theoretical model of optical Fourier transform spectrum intensity distribution(OFTSID)of the 1-D Gaussian distribution wood surface is established. And the numerical expression of the theoretical model that can calculate root-mean-square height Rq and autocorrelation function of wood surface is got by numerical calculation.This paper mentioned a new type of measurement system that can measure the two parameters above.This system has the advantages of noncontact,high measurement speed,unaffected by the inspected wood material and giving more abundant information about inspected surface This method can be used in classification and in-time measurement of wood surface roughness after improved.