Unverified80% confidenceDecision RuleTime unknown
压电薄膜（BCG弹道式）传感器比气囊式在心率/呼吸检测精度上更稳定，采样率≥100Hz的产品才能可靠捕捉体动微信号，低于50Hz的容易漏检翻身与心率变异
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80%
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Long-term
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Unverified压电薄膜（BCG弹道心冲击图）传感器采样率需≥100Hz才能稳定分离心跳与呼吸信号，低于50Hz的产品在低心率或浅呼吸时漏检率显著上升93% similarUnverified压电薄膜（BCG弹道式）传感器的心率精度可达±3bpm、呼吸率±1次/分，明显优于压力气囊式；对心率变异性(HRV)和呼吸暂停的识别需要压电或雷达方案，气囊式仅适合基础翻身/离床监测84% similarUnverified监测心率+呼吸率+体动的压电薄膜（BCG）传感器方案比单纯的压力条方案精度高，选购时确认使用的是全床铺设式压电膜或气囊+BCG复合方案，仅靠床头单点压力条的心率误差常超过±5bpm81% similarUnverified监测心率呼吸的感应片需支持BCG（心冲击图）算法，采样率≥50Hz才能区分心跳与呼吸波，采样率＜20Hz的低端型号只能测在床/离床，无法给出可靠心率数据78% similarUnverified老人/慢病监护场景优先选带呼吸暂停(AHI)检测的压电薄膜(BCG)传感器机型，心率/呼吸率检测误差需≤±3bpm/次；纯气囊式(充气管)机型响应慢、易漏气衰减，长期监护不推荐72% similar
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