| 采用相位法与极大值法测量超声波声速的准确度的研究 |
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| 引用本文： | 邹红玉,江影.采用相位法与极大值法测量超声波声速的准确度的研究[J].大学物理,2007,26(5):32-34. |
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| 作者姓名： | 邹红玉 江影 |
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| 作者单位： | 1. 浙江林学院,理学院信息物理系,浙江,临安,311300
2. 中国计量学院,理学院实验中心,浙江,杭州,310018 |
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| 基金项目： | 浙江林学院教改基金资助项目(zc0510) |
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| 摘 要： | 对极值法和相位法测量超声波声速的准确度问题进行了研究,实验与理论分析证明:相位法测量波长比极值法准确度要高.在与简谐运动有关的测量中,测量最大变化率点常常比测量最大值点的准确度要高,这在其他物理实验中也适用.
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| 关 键 词： | 极值法 相位法 波长 |
| 文章编号： | 1000-0712(2007)05-0032-03 |
| 收稿时间： | 08 15 2006 12:00AM |
| 修稿时间： | 2006年8月15日 |
Discuss accuracy question about measuring wavelength for ultrasonic velocity definite using phase method or extreme value method |
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| ZOU Hong-yu,JIANG Ying.Discuss accuracy question about measuring wavelength for ultrasonic velocity definite using phase method or extreme value method[J].College Physics,2007,26(5):32-34. |
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| Authors: | ZOU Hong-yu JIANG Ying |
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| Institution: | 1. Department of Information Physics, School of Science, Zhejiang Forestry University, Linan, Zhejiang 311300, China; 2. Experiment Center, College of Science, China Jiliang University, Hangzhou 310018, China |
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| Abstract: | In the experiment for measuring ultrasonic velocity,the accuracy in measureing wavelength by extreme value method or phase method are discussed,through experiment and theory'analysis,it is proved that accuracy of phase method is better than that of extreme value method in measure wavelength at one time,it is better to measure an extreme value rate point than a extreme value point. |
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| Keywords: | extreme value method phase method wavelength |
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