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一、引言 [color=var(--md-box-samantha-normal-text-color) !important]背景抑制光電開關主要通過發射特定波長的光信號，如紅外光等，當光線照射到目標物體和背景時，會產生反射光。其核心原理是利用 XD08M3232 單片機對反射光信號進行處理。通過特殊的算法和電路設計，能夠區分目標物體反射光與背景反射光的差異。一般來說，通過調節發射光的強度、接收光的靈敏度以及對信號的時間分析等手段，使得只有在特定距離范圍內（即目標物體所在位置）的反射光信號被有效識別，而超出該范圍的背景反射光則被抑制，從而實現背景抑制功能，準確判斷目標物體的有無和位置信息。 三、硬件設計
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