| 杨氏模量测定的尺镜组装置研究与设计 |
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| 引用本文： | 钱良存,朱德泉,洪炜宁,刘家菊,段志刚,汪大勇.杨氏模量测定的尺镜组装置研究与设计[J].河南科技大学学报(自然科学版),2008,29(6). |
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| 作者姓名： | 钱良存 朱德泉 洪炜宁 刘家菊 段志刚 汪大勇 |
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| 作者单位： | 安徽农业大学,理学院,安徽,合肥,230036 |
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| 基金项目： | 安徽农业大学校科研和教改项目，安徽省高校省级教学研究项目 |
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| 摘 要： | 为了提高杨氏模量测定精确度,从试验误差角度分析,得出因尺镜组调节不当引起误差,从而降低了杨氏模量测量的准确度;从测量不确定度和有效数字处理角度分析,得出杨氏模量的测量精度被尺镜组所制约.因此,对测量方法和尺镜组装置进行了改进,将标尺设计为最小分度值为0.02 mm移动铅直标尺,望远镜设计为准直望远镜,光杠杆镜面到标尺距离为1.236 2 m以上.通过试验,得出测量结果总不确定度由0.07×1011 N*m-2下降为0.025×1011 N*m-2,使测量结果的有效位数增加一位,减小了人为调偏标尺和望远镜的误差.
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| 关 键 词： | 精确度 移动铅直标尺 杨氏模量 准直望远镜 |
Research and Design on Ruler-telescope Group Devices of Measuring Young's Modulus |
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| QIAN Liang-Cun,ZHU De-Quan,HONG Wei-Ning,LIU Jia-Ju,DUAN Zhi-Gang,WANG Da-Yong.Research and Design on Ruler-telescope Group Devices of Measuring Young's Modulus[J].Journal of Henan University of Science & Technology:Natural Science,2008,29(6). |
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| Authors: | QIAN Liang-Cun ZHU De-Quan HONG Wei-Ning LIU Jia-Ju DUAN Zhi-Gang WANG Da-Yong |
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| Institution: | QIAN Liang-Cun,ZHU De-Quan,HONG Wei-Ning,LIU Jia-Ju,DUAN Zhi-Gang,WANG Da-Yong (School of Science,Anhui Agricultural University,Heifei 230036,China) |
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| Abstract: | To improve accuracy of Young's modulus, this paper analyzes the measuring errors.They are caused by inaccurate adjusting ruler-telescope group,so the measured Young's modulus exactitude is cut down.Due to measuring uncertainty and processing significant figure,the experimental precision is determined by the millimeter graduated ruler of ruler-telescope group devices.To improve the measuring method and the accuracy of ruler-telescope group devices,the ruler and telescope in ruler-telescope group are designed... |
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| Keywords: | Accuracy Vertical sliding ruler Young\'s modulus Horizontal axis telescope |
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