摘要
对4种枪支发射的弹壳进行图像采集,经观察发现冲击磨损痕迹周边均为锯齿状不规则形态,表明其是非线性的且具有分形特征;应用分形理论的周长-面积公式和最小二乘法原理,对所采集的4种枪支的冲击磨损痕迹图像进行分析计算的结果表明,枪种不同,所配用击针头的形状、尺寸不同,冲击磨损痕迹图像的分形维数值也不同,因此可以用分形维数来描述弹壳上不同枪支的冲击磨损痕迹特征,从而为冲击磨损痕迹的量化检验作出初步的探索。
By collecting the images of the cartridge cases shot by four kinds of guns, it was found that the circumference of the firing-pin impression appeared as an irregular jigsaw shape, showing its nonlinear nature and fractal characteristics. By applying the perimeter-area formula in fractal theory and least square method, the firing-pin impressions of four kinds of guns were analyzed and calculated. The results show that the fractal dimensions of the firing-pin impressions are different for different guns and different shapes and sizes of firing-pin equipped. Therefore, the characteristics of firing-pin impression on cartridge cases from different guns can be described by using fractal dimension,which can be regarded an explorative study on the quantitative examination of the firing-pin impression.
出处
《润滑与密封》
EI
CAS
CSCD
北大核心
2006年第12期65-67,共3页
Lubrication Engineering
基金
广东省科技项目(2003C32401)
关键词
分形几何
分形维数
击针
冲击磨损痕迹
fractal theory
fractal dimensions
firing-pin
firing-pin impression
