＠刘丽娟＠赵洪＠雷旭＠吕月兰￥哈尔滨理工大学１引言利用激光衍射原理测线径的方法很多，其中有些方法已成功地应用于生产实践中。１９８８年Ｊ．Ｆ．Ｆａｒｄｅａｕ系统地介绍了这种仪器在线材工业中的应用情况，精度可达０．２％〔１〕，后来国外的一些厂家相继推出了此类测... @ Liu Lijuan @ Zhao Hong @ Lei Xu @ Lu Yuelan ¥ Harbin University of Science and Technology 1 Introduction Laser diffraction principle measurement of diameter many ways, some of which have been successfully used in production practice. 1988 J. F. Fardeau systematically introduced the application of this instrument in the wire industry, the accuracy of up to 0.2% [1], and later some foreign manufacturers have introduced such tests ...