# CPD雷达检测失败的根因分析
cpd_failure_analysis = {
    "root_cause": "雷达信号被Isofix婴儿床外壳遮挡",
    "details": [
        "婴儿床外壳（塑料/泡沫）对60GHz雷达有较强衰减",
        "新生儿呼吸幅度极小（胸壁位移<1mm）",
        "婴儿床将新生儿抬高到座椅上方，不在雷达最优感知区",
        "Isofix金属支架产生多径干扰"
    ],
    "indirect_system_success": {
        "reason": "Mercedes间接系统检测安全带锁状态",
        "logic": "安全带插入 → 座椅被占用 → 有乘员 → 警告",
        "limitation": "无法区分成人/儿童/物体（安全带锁上但有重物也会误报）",
        "warning_method": "仅中控屏显示（无声音/无闪光）"
    }
}

# CPD 系统设计要求（基于ADAC测试教训）
cpd_design_requirements = {
    "critical_scenario": "Isofix婴儿床+新生儿",
    "root_causes": [
        "雷达穿透婴儿床外壳衰减",
        "新生儿呼吸幅度<1mm",
        "雷达安装位置未覆盖婴儿床高度"
    ],
    "solutions": {
        "multi_sensor": "雷达+安全带+座椅压力融合（不依赖单一传感器）",
        "better_radar": "多位置雷达（车顶+B柱+座椅下方）",
        "higher_sensitivity": "提高雷达灵敏度 + 信号处理增强",
        "seat_sensor": "Isofix接口传感器检测婴儿床安装",
        "logic_chain": "Isofix接入 → 有婴儿床可能 → 强制启用最敏感检测模式"
    },
    "must_pass_scenarios": [
        "Isofix婴儿床+新生儿（当前全部失败）",
        "安全带婴儿床+新生儿",
        "Isofix儿童座椅+1岁儿童",
        "动物在后排",
        "空座（不误报）"
    ]
}

# 多级警告策略（基于ADAC测试建议）
multi_level_warning = {
    "level_1": {
        "trigger": "检测到后排有生命体",
        "actions": ["中控屏弹窗", "仪表盘图标"],
        "delay": "立即",
        "target": "驾驶员"
    },
    "level_2": {
        "trigger": "熄火后30秒仍检测到",
        "actions": ["喇叭短鸣×3", "双闪", "APP推送"],
        "delay": "30秒",
        "target": "驾驶员+附近"
    },
    "level_3": {
        "trigger": "车内温度>35°C或持续>5分钟",
        "actions": ["持续喇叭", "车窗微降", "空调制冷", "紧急呼叫"],
        "delay": "5分钟",
        "target": "周围+紧急服务"
    },
    "key_principle": "必须同时使用视觉+听觉+APP多通道，ADAC测试显示仅中控屏警告容易被忽视"
}