We present the design, realization, and testing of a variable reluctance energy harvester for the detection of moving ferromagnetic parts, e.g. the wheels of a train while passing over a train passage detector. Measurements were done to determine the output voltage, the energy output per event and the power output with the frequency of the moving ferromagnetic, body. Results are compared with finite element analysis (FEA) to estimate the change in magnetic flux and the output voltages. A maximum energy output of 131 μJ per pulse was measured for a simulated condition of a train wheel passing with a speed of 81.5 km/h, which results in a mean output power of 5.9 mW, with a spacing of 10 mm between wheel and the reluctance circuit. This shows that the variable reluctance principle, a well-known method used for numerous sensor applications, is also a comfortable, energy-autonomous and reliable method to detect passing train wheels or other moving ferromagnetic parts, with a simple setup and fairly high useable output power.
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机译：我们介绍了可变磁阻能量收割机的设计，实现和测试，用于检测移动铁磁性部分，例如，一列火车的轮子在通过火车通道探测器时。进行测量以确定输出电压，每个事件的能量输出和动力输出，带有移动铁磁，主体的频率。结果与有限元分析（FEA）进行比较，以估计磁通量和输出电压的变化。测量每个脉冲的131μj的最大能量输出，以81.5 km / h的速度的火车轮的模拟条件测量，这导致平均输出功率为5.9 mw，间距为10 mm之间的间隔磁阻电路。这表明可变磁阻原理，一种用于众多传感器应用的公知方法，也是一种舒适，能量自主和可靠的方法，用于检测传递火车车轮或其他移动的铁磁部件，具有简单的设置和相当高的输出力量。
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