Editor’s notes: This article presents a solution to the problem of reliably detecting the position of barrier booms in automatic level-crossing systems. The solution relies on observing the shape of the motor power supply current waveform. The solution is validated using a test stand equivalent to a typical level-crossing system installation. —Binoy Ravindran, Virginia Tech

中文翻译：

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用无创角度检测方法提高水平道闸机功能安全性

编者按：本文提出了一种解决方案，以解决在自动平交道口系统中可靠检测栅栏杆位置的问题。该解决方案依赖于观察电机电源电流波形的形状。该解决方案使用相当于典型的平交道口系统安装的测试台进行验证。——比诺伊·拉文德兰，弗吉尼亚理工大学