Objective: Measurement and analysis of forced harmonic rotary oscillation
Pohl’s wheel or rotating (torsional) pendulum allows for the investigation of forced harmonic rotary oscillation. For this purpose, the oscillating system is connected to an excitation linkage which is driven by an adjustable-speed DC motor so that the restoring spring periodically extends and compresses. In this experiment the amplitude is measured as a function of the excitation frequency for various degrees of damping and the phase shift between the excitation and the actual oscillation is observed.
![Experiment: Pohl’s Torsion Pendulum (230 V, 50/60 Hz), 8000561 [UE1050550-230], Oscillations](/imagelibrary/UE1050550-230/UE1050550-230_01_Experiment-Pohl-s-Torsion-Pendulum-230-V-5060-Hz.jpg)
![Experiment: Pohl’s Torsion Pendulum (230 V, 50/60 Hz), 8000561 [UE1050550-230], Oscillations](/thumblibrary/UE1050550-230/UE1050550-230_01_1200_1200_Experiment-Pohl-s-Torsion-Pendulum-230-V-5060-Hz.jpg)
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![扭摆（与Pohl 教授提出的一致）-
用于具有阻尼的振荡分析, 1002956 [U15040], 振动](/thumblibrary/U15040/U15040_01_140_140_扭摆-与Pohl-教授提出的一致-用于具有阻尼的振荡分析.jpg)
![直流电源0 – 20 V, 0 – 5 A (230 V, 50/60 Hz), 1003312 [U33020-230], 供电器](/thumblibrary/U33020-230/U33020-230_01_140_140_直流电源0-20-V-0-5-A-230-V-5060-Hz.jpg)
![AC Plug-in Power Supply 24 V, 0.7 A (230 V, 50/60 Hz), 1000681 [U33200-230], 供电器](/thumblibrary/U33200-230/U33200-230_01_140_140_AC-Plug-in-Power-Supply-24-V-07-A-230-V-5060-Hz.jpg)
![机械秒表, 1003369 [U40801], 长度测量](/thumblibrary/U40801/U40801_01_140_140_机械秒表.jpg)
![模拟万用表ESCOLA 30, 1013526 [U8557330], 手持模拟测量仪器](/thumblibrary/U8557330/U8557330_01_140_140_模拟万用表ESCOLA-30.jpg)