Internally the DSI sensors use analogue Hall Effect elements, which measure the change of magnetic field that is created by the gear rotation.
DSI传感器内部结构采用类似于霍尔效应的原理，测量齿轮旋转引发的磁场变化。
An intelligence switch box is designed by use of analogue electronic elements and digital electronic elements. The paper introduces the functions and working principle of the device.
用模拟电子元件和数字电子元件设计一种智能开关盒，介绍这种装置的作用和工作原理。
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