Unverified85% confidenceTradeoffTime unknown
视角选择130-150度为最佳区间：广角(≥160度)覆盖更宽但边缘畸变严重且拉远车牌导致取证时看不清对方车牌，取证优先应选140度左右
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85%
Confidence
Long-term
Relevance
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Unverified视角需≥160°对角，垂直视角是关键，160°横向但垂直不足仍看不清近门地面，选购时优先看垂直覆盖角度82% similarUnverified水平广角镜头选择≥160°才能覆盖门口完整站姿人像，＜120°会导致贴门站立者头部被裁切75% similarUnverified垂直视角≥150度或达到180度鱼眼视野，可覆盖门口俯视区域，低于120度会看不到脚边包裹75% similarUnverified探测角度越广（如180°吸顶款）单点覆盖面积越大但边缘灵敏度和探测距离下降，90°~110°的墙角壁挂款探测距离更远（8~12米）适合长走廊，房间中央防护优选吸顶360°74% similarUnverified标准壁挂PIR探测角度约90-110°、距离8-12m，走廊等狭长空间应选幕帘型（探测角5-15°、距离可达15m）而非广角型，否则覆盖不到纵深74% similar
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