| 音叉的速度共振与位移共振曲线的测量和研究 |
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| 引用本文： | 倪敏,薛珍美.音叉的速度共振与位移共振曲线的测量和研究[J].实验室研究与探索,2010,29(2). |
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| 作者姓名： | 倪敏 薛珍美 |
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| 作者单位： | 上海师范大学数理学院,上海,200234 |
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| 摘 要： | 利用接收线圈和压电换能片2种传感器测得音叉受迫振动的速度、位移共振曲线,通过实验比较和理论分析,证明这2种传感器所测得的物理量并不相同,同时分析和验证了2种幅频曲线的区别。对影响位移共振曲线测量结果的阻尼系数进行讨论和分析,得出:用接收线圈做传感器测得的音叉共振曲线为速度共振曲线,而用压电换能片做传感器测得的音叉共振曲线为位移共振曲线。实验的研究有利于学生对受迫振动和共振概念的深入理解,也有利于对2种传感器的正确运用。
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| 关 键 词： | 音叉 速度共振 位移共振 接收线圈 压电换能片 |
Survey and Research of Tuning Fork's Velocity Resonance and Displacement Resonance Curves |
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| NI Min,XUE Zhen-mei.Survey and Research of Tuning Fork's Velocity Resonance and Displacement Resonance Curves[J].Laboratory Research and Exploration,2010,29(2). |
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| Authors: | NI Min XUE Zhen-mei |
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| Institution: | NI Min,XUE Zhen-mei(College of Mathematics , Science,Shanghai Normal University,Shanghai 200234,China) |
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| Abstract: | The receiving loop and peizoelectric transducer were used to measure the velocity and displacement resonance curves of a tuning fork.It was demonstrated that the physical quantites measured by the two kinds of sensor are different through experimental comparison and theoretical analysis.Also the difference between the two amplitude-versus-frequency curves was analyzed and demonstrated.At the same time, the damping coefficient which affects the measurement of the displacement resonance curve was discussed an... |
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| Keywords: | tuning fork velocity resonance displacement resonance receiving coil piezoelectric transduce |
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