The Role of UAV Detection Radar in Hydrological Monitoring
Release time:
2022-09-22
The purpose of UAV detection radar observation of water flow is to master its characteristics, study its time variation and spatial distribution, and find out its activity law through analysis and research. There are many methods for observing water flow, among which various hydrological flow measuring instruments are convenient and reliable.
UAV detection radarThe purpose of observing the water flow is to grasp its characteristics, study its time variation and spatial distribution, and find out its activity law through analysis and research. There are many methods for observing water flow, among which various hydrological flow measuring instruments are convenient and reliable.
At present, the flow measurement methods in the hydrological industry mainly include fixed-point flow measurement and non-fixed-point patrol measurement. The method of fixed-point flow measurement is limited to the point measurement at a specific location, which has great limitations. Non-fixed-point flow measurement can only be carried out on bridges and river banks, and it is difficult to carry out fine flow measurement for rivers with wide drainage area and fast flow speed. Especially in the debris flow disaster area, flow measurement is extremely difficult, and there is no suitable equipment for accurate hydrological data collection.
With its flexible and convenient working mode, combined with the requirements of demand-oriented and innovative services, UAV detection radar can reduce the risk factor of manual measurement, improve work efficiency and measurement accuracy under the conditions of rapid emergency demand and harsh environment.
Composition of 1. UAV Detection Radar Hydrological Monitoring
1. UAV: used to mount radar current meter, wireless camera and other equipment.
2. Stable pan-tilt: the attitude of the radar current meter can be adjusted to meet the installation requirements of the radar current meter.
3. Radar flow meter: the use of Doppler effect to measure the surface velocity.
4. Radio communication system: used to transmit the control instructions of the UAV and the information of the relevant airborne equipment.
Ground control system: used to send commands and receive data related to drones and other equipment.
Power supply system: power supply for the whole system.
2. UAV detection radar hydrological monitoring workflow
1. Intelligent route planning, hovering above the test site;
2. Autonomous flight, no cableway, reduce construction costs;
3. "Stable PTZ" minimizes the impact of wind and fuselage vibration on current measurement accuracy;
4. Multi-vertical flow measurement, in line with hydrological specifications;
5. Wireless transmission of speed measurement data to the ground control terminal;
6. Matching flow measurement software automatically generates flow report, simple operation;
7. Suitable for emergency flow measurement;
8. Flexible choice of flow measurement location.
The hydrological monitoring of UAV detection radar is made by using the principle of Doppler effect. When working, it will produce electromagnetic waves on the water surface, and when it meets the moving water surface, it will scatter and form an echo. Since the received echo frequency is offset from the transmitted frequency, the velocity of the water surface can be obtained by the Doppler frequency equation, and the moving target will produce a low-frequency output signal at the radar sensor. The frequency of this signal depends on the moving speed, and the amplitude depends on the installation distance, reflectivity and the size of the moving target. The Doppler frequency f is proportional to the motion velocity.
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