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| 扫描面几何特征对扫描声强法确定声功率误差的影响 | |
| 引用本文： | 毕传兴,陈剑,周广林,陈心昭.扫描面几何特征对扫描声强法确定声功率误差的影响[J].农业机械学报,2005,36(3):111-114,121. |
| 作者姓名： | 毕传兴 陈剑 周广林 陈心昭 |
| 作者单位： | 1. 合肥工业大学动态测试中心,博士生,230009,合肥市 2. 合肥工业大学动态测试中心,教授,博士生导师 3. 合肥工业大学动态测试中心,博士生 4. 合肥工业大学校长,教授,博士生导师 |
| 基金项目： | 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) |
| 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，或在大于所求取的误差峰值点范围内增加测量面的边长来减小误差。 |
| 关 键 词： | 测量面 误差 几何特征 扫描路径 峰值 方波 线密度 声功率 扫描声强法 长度 |
Effects of Geometric Characteristics of Scanning Surface on Error of Sound Power Determination |
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| Bi Chuanxing,Chen Jian,Zhou Guanglin,Chen Xinzhao.Effects of Geometric Characteristics of Scanning Surface on Error of Sound Power Determination[J].Transactions of the Chinese Society of Agricultural Machinery,2005,36(3):111-114,121. | |
| Authors: | Bi Chuanxing Chen Jian Zhou Guanglin Chen Xinzhao |
| Institution: | Hefei University of Technology |
| Abstract: | 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. |
| Keywords: | Sound intensity Sound power Error analysis Scanning path |
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