• MYUAV DRONE River Flow Velocity Measurement Scheme

Overview of water flow velocity measurement system

The flow velocity of water is an extremely important element in hydrological measurement. The purpose of observing water flow is to grasp its characteristics, study its temporal and spatial distribution, and identify its activity patterns through analysis and research. River flow velocity measurement is an important task in river management, which helps to ensure stable river conditions, embankment safety, prevent flood disasters, protect people's lives and property safety, maintain water ecological environment, and achieve sustainable utilization of water resources.

• Advantages of MYUAV DRONE water flow velocity measurement system

The MYUAV DRONE flow measurement system, with its safe, flexible, and convenient working mode, combined with demand oriented and innovative service requirements, can achieve advantages such as reducing the risk factor of manual measurement, improving work efficiency and measurement accuracy under faster emergency hydrological testing requirements and harsh environmental conditions.

• System composition

(1) MYUAV DRONE: Used for mounting radar flow meters, wireless cameras, and other devices.

(2) Enhanced stability gimbal: The attitude of the radar flow meter can be adjusted to meet the installation requirements of the radar flow meter.

(3) Radar velocimeter: Utilizing the Doppler effect to measure the surface velocity of flowing water.

(4) Radio communication system: used to transmit MYUAV DRONE control commands and information related to mounted devices.

(5) Ground control system: used to send commands and receive relevant data from devices such as MYUAV DRONE.

(6) Positioning system: Integrate centimeter level high-precision positioning services.

(7) Power supply system: Provides power to the entire system.

•  Principle of Radar Flow Measurement

The radar current meter uses the Doppler effect principle to measure the surface velocity of fluids. In the field of acoustics, when there is relative motion between the sound source and the receiver (i.e. the probe and reflector), the frequency of the echo will change, and this frequency change is called frequency shift, which is the Doppler effect. When the radar current meter and the water body move at a relative velocity V, the frequency of the electromagnetic wave received by the radar current meter is different from the frequency of the electromagnetic wave emitted by the radar itself, and this frequency difference is called Doppler frequency shift. By calculating the relationship between Doppler frequency shift and V, the surface velocity of the fluid is obtained.

•  Flow calculation

The flow measurement vertical line shall be arranged in accordance with the requirements of GB 50179-2015 River Flow Measurement Specification. As shown in the figure, the red lines represent the vertical lines set for the flow measurement section, with a total of 10 vertical lines, dividing the section into 11 small sections. The average vertical flow velocity Vn on each vertical line is the product of the surface flow velocity Vn table measured by the radar flowmeter at the measuring point and the water surface velocity coefficient k, that is, Vn vertical=Vn table * k, where n represents the corresponding vertical line number. The flow rate of the small section can be calculated according to the formula.

• Functional characteristics

(1) Planar microstrip radar non-contact detection, unaffected by climate, sediment, and floating debris.

(2) Fast and accurate measurement, stable data output, and suitable for high flow velocity environments during flood periods.

(3) The antenna transmission frequency is flexible and adjustable, which can effectively avoid interference between multiple products.

(4) Multiple data communication interfaces can be set up to facilitate user system integration.

(5) Combining measurement operation and sleep mode to save energy and reduce consumption.

(6) Designed to prevent internal condensation, waterproof, and lightning protection, suitable for various outdoor environments.

--DRONE SOLUTION PROVIDER--

MYUAV® TECHNOLOGIES CO.,LTD.

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