摘要
给出了扫描线密度的定义 ,用改进的矩形测量面方波扫描路径测量声功率的计算模型 ,建立了测量面的几何特征与误差之间的函数关系。分析结果表明 :通过增加扫描垂直线条数、测量面上平行于扫描方向的边的长度或减小垂直于扫描方向的边的长度 ,都可以减小误差 ;对于正方形测量面 ,可以通过增加扫描垂直线条数 。
The density of the scanning lines was defined and the functional relationship between the geometric characteristics of the scanning surface and the error was established by an improved model of sound power determination by using the orthogonal scanning path. The analytical results showed that the error could be reduced by increasing the number of the vertical scanning lines, extending the length of the side of the scanning surface paralleled to the scanning direction, or shortening the length of the side of the scanning surface perpendicular to the scanning direction. For a square scanning surface, the error could be reduced by increasing the number of the vertical scanning lines or extending the length of the side of the scanning surface in the region over the peak value of error.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2005年第3期111-114,121,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目 (项目编号 :5 0 2 75 0 44 )
教育部科学技术研究重点项目 (项目编号 :0 2 12 6)
安徽省自然科学基金资助项目(项目编号 :0 0 0 47418)
