Wind is free and ubiquitous and can be harnessed in multiple ways. We demonstrate mechanical stochastic resonance in a tabletop experiment in which wind energy is harvested to amplify weak periodic signals detected via the movement of an inverted pendulum. Unlike earlier mechanical stochastic resonance experiments, where noise was added via electrically driven vibrations, our broad-spectrum noise source is a single flapping flag. The regime of the experiment is readily accessible, with wind speeds similar to 20 m/s and signal frequencies similar to 1 Hz. We readily obtain signal-to-noise ratios on the order of 10 dB.
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机译:风是自由和普遍存在的,可以多种方式加以利用。我们在一个桌面实验中展示了机械随机共振,在该实验中,风能被收集以放大通过倒立摆的运动检测到的微弱周期性信号。与早期的机械随机共振实验不同,后者是通过电驱动的振动来添加噪声的,而我们的广谱噪声源是单个拍打信号。该实验方案很容易获得,风速类似于20 m / s,信号频率类似于1 Hz。我们可以轻松获得10 dB量级的信噪比。
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