For obvious reasons, wired devices are near-impervious to this sort of issue; there's nothing stopping the button's electrical signal from reaching your PC along the way.
显然，对于这种问题有线设备是近似无干扰的：没什么会阻止按键的电信号沿着线输入到你的电脑。
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Usage: This detector is applied to plastic looms for stopping operation in case of broken weft and weft-out. It is composed of signal emitter, receiver and controller.
The stopping time is chosen by minimal mean square error, signal-to-noise ratio and minimal correlation coefficient based on the information of the original (ideal) images and noises.