Bauman Moscow State Technical University, 2-nd Baumanskaya 5-1, 105005 Moscow, Russia.
Kotelnikov Institute of Radioengineering and Electronics of RAS, Mokhovaya 11-7, 125009 Moscow, Russia.
Sensors (Basel). 2021 Oct 26;21(21):7077. doi: 10.3390/s21217077.
We present a theoretical and experimental study in which we increased the sensitivity of a phase-sensitive optical time-domain reflectometer (phi-OTDR). This was achieved by constructing coils in the sensor cable, which increased the total amplitude of the impact on the fiber. We demonstrate this theoretically using the example of a phase-sensitive reflectometer model and practically in testing grounds with a buried nearby conventional sensor and a sensor with coils. The sensitivity increased 2.2 times. We detected 95% of events when using coils, versus 20% when using a straight cable. The suggested method does not require any modifications to the device.
我们进行了一项理论和实验研究，通过在传感器电缆中构建线圈来提高相敏光时域反射仪（phi-OTDR）的灵敏度。这使得光纤所受的总冲击幅度增加。我们使用相敏反射仪模型进行了理论论证，并在具有附近埋置常规传感器和带线圈传感器的测试场地上进行了实际验证。灵敏度提高了 2.2 倍。使用线圈时，我们可以检测到 95%的事件，而使用直电缆时则只能检测到 20%。所提出的方法不需要对设备进行任何修改。
