大学物理 ›› 2007, Vol. 26 ›› Issue (5): 32-32.

• 著者文摘 • 上一篇    下一篇

采用相位法与极大值法测量超声波声速的准确度的研究

邹红玉[1] 江影[2]   

  1. [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
  • 出版日期:2007-05-25 发布日期:2007-05-20

Discuss accuracy question about measuring wavelength for ultrasonic velocity definite using phase method or extreme value method

  • Online:2007-05-25 Published:2007-05-20

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.

关键词: 极值法, 相位法, 波长

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.

Key words: extreme value method, phase method, wavelength

中图分类号: 

  • O4-33