| 两种超声波速度测量方法的比较研究 |
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| 引用本文： | 夏玲丽,朱峰.两种超声波速度测量方法的比较研究[J].价值工程,2012,31(24):64-65. |
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| 作者姓名： | 夏玲丽 朱峰 |
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| 作者单位： | 陆军军官学院,合肥,230031 |
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| 摘 要： | 在同样的实验环境条件下,选用四台声速测量仪进行实验,对每台仪器均采用共振干涉法和相位法测量声波在空气中的传播速度并作比较研究。在共振干涉法测量中,选用数字示波器直接观察电压数值变化来确定极大值位置;在相位法实验中,选择示波器的电压最小灵敏度档位观察李萨如形貌变化。实验结果显示,相位法比共振干涉法更准确,更优越。
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| 关 键 词： | 声波 驻波法 相位法 数字示波器 |
The Comparison Studies of Two Kinds of Ultrasonic Velocity Measurement Method |
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| XIA Ling-li
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ZHU Feng.The Comparison Studies of Two Kinds of Ultrasonic Velocity Measurement Method[J].Value Engineering,2012,31(24):64-65. |
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| Authors: | XIA Ling-li ZHU Feng |
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| Institution: | XIA Ling-li;ZHU Feng(Army Officer Academy of PLA,Hefei 230031,China) |
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| Abstract: | Measure the speed of sound with four different sound velocimeter in the same experiment environmental conditions.Each instrument are used for resonance interferometry and phase measurement of acoustic wave propagation velocity in the air and make a comparative study.In the measurement of the resonance interferometry,select the digital oscilloscope to observe changes in the voltage values to determine the maximum position;in the experimental phase method,choose minimum voltage sensitivity of the oscilloscope to observe the changes of lissajous figures.The results show that the phase method is more accurate and superior than the resonance interferometry. |
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| Keywords: | sound waves standing wave method the phase method digital oscilloscope |
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