一种地下排水管道流速测量方法

A Velocity Measurement Method of Underground Drainage Pipeline

城市地下管网排水系统是整个城市的“血脉”,准确掌握管道水流状况能为制定科学的管理方案提供有效数据支撑。地下管网腐蚀性强、湿度大、毒性重、空间狭小等环境特点,给传统流速测量设备带来挑战。为更好地监测流速情况,设计了一种以0.12 THz频段雷达流速仪,使用透镜天线将雷达电磁波约束在较小的范围内,采用多普勒谱中心频率估计算法计算多普勒频率,结合速度统计滤波法获取稳定可靠的流速测量结果。所设计的太赫兹雷达流速仪具有精度高、体积小、功耗低、耐腐蚀、不受温湿度影响等优点,为地下管网流速测量提供有效可行性方案。

The urban underground pipe network drainage system is the“blood”of the entire city.The scientific management plans should be based on the accurate data of the pipeline water flow.The environmental characteristics of the underground pipe network,such as strong corrosivity,high humidity,heavy toxicity and narrow space,bring challenges to the traditional velocity measurement equipment.In order to monitor the velocity,a radar with 0.12 THz frequency band is designed to calculate the Doppler frequency,which uses a lens antenna and adapts the spectral center estimation algorithm.The statistical filter method can obtain stable and reliable flow velocity measurement results.The proposed terahertz radar has the advantages of high precision,small size,low power consumption,corrosion resistance and not influenced by temperature and humidity,which provides an effective and feasible scheme for velocity measurement of the underground pipe network.