Water Velocity and Level Monitoring Based on UAV Radar

• Published in: 2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC) Vol. 4; pp. 1232 - 1236
• Main Authors: Wang, Taoran, Hao, Shuxian, Ma, Xinyi
• Format: Conference Proceeding
• Language: English
• Published: IEEE 18.06.2021
• Subjects: Current measurement; distance measurement; Force measurement; Radar; Radar measurements; river; speed measurement; UAV; Unmanned aerial vehicles; Velocity measurement; Water
• ISSN: 2693-2776
• DOI: 10.1109/IMCEC51613.2021.9482041

Radar is a non-contact monitoring tool for water flow monitoring, which is not affected by environmental factors, and has high measurement accuracy and long measurement distance. Therefore it has been widely used in recent years. At present, the radar hydrology survey mainly adopts a fixed mode. This way cannot meet the needs such as sudden floods and emergency rescue. In order to solve this problems, a water velocity and level monitoring based on UAV (Unmanned Aerial Vehicle) radar is proposed in this paper. The innovations of this paper are manifested in three aspects: 1) In order to overcome the influence of 1/f noise on the accuracy of current measurement, a scheme of shifting the frequency of the intermediate frequency signal outside the 1/f noise is proposed to improve the current measurement ability under weak signal conditions; 2) In order to overcome the unstable tilt angle of radar flow measurement caused by UAV jitter and wind force, the Kalman filter technology is used to estimate inclination angle for enhancing the flow measurement stability; 3) In order to overcome the influence of floating objects on the flow measurement accuracy, a multi-point flow measurement technology with spatio-temporal filtering is proposed to reduce the interference of floating objects. The experimental results show that the accuracy of the flow measurement in this paper is doubled compared with the traditional method, and the flow velocity range is doubled. The system has the advantages of small weight and low power consumption, and is suitable for flexible deployment of ordinary UAVs.