基于光纤传感技术的校园安全防控工程

校园是人口密度较高的公众场所，是国家人才培养的重要场所，其安全关系 重大。目前，校园安全防控主要依赖于安保人员定期巡逻和抽检。其中周界安防、 校园交通、火警预警和漏电积水预警等重要场景，目前缺少长时间智能实时监控 手段。 光纤传感技术以其灵敏度高、耐腐蚀、耐高温、传输距离远等优势可在校园 实时安全检测中发挥重要作用。面向交通监测与周界安防问题，本研究创新性采 用相敏光时域反射（Φ-OTDR）技术，结合基于空间移项（SPS）的相位解调算法， 实现了以 10 m 空间分辨率在 4 km 范围内对频率大于 0.1 Hz 的振动信号进行实时 测量监控，同时解决了分布式光纤传感系统数据量过大的问题；面向火警、漏电、 积水等问题，本研究创新性采用点式光纤传感技术，实现了三种不同结构的新型 传感器，分别实现了灵敏度为 223 pm/℃、0.604 nm/V 和-1.348 nm/cm 的低成本精 确测量。 本研究验证了光纤传感技术在校园安全防控工程上的可行性，与传统人工巡 逻相比，该方案可以节省大量人力物力，做到全天候校园安全持续监测预警，具有 产业化潜力。

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