A device and method for real-time online measurement of river cross-sectional area and flow

Abstract

The invention discloses a device for real-time on-line measurement of the cross-sectional area and flow of a river channel. Channel distribution, the submersible ultrasonic current meter includes the shell and the air chamber arranged on the shell, the ultrasonic probe and the water level sensing module, the ultrasonic probe of each submersible ultrasonic current meter, the water level sensing module and the gyroscope on the communication cable The instruments are connected to the sunken river crossing cableway through communication cables. The invention also discloses a method for real-time on-line measurement of the cross-sectional area and flow of the river channel. The invention realizes the on-line measurement of the flow without manual operation. Obtain the velocity in the fluid in real time, avoid surface wave interference, and are not subject to environmental restrictions such as weather. Suspended installation will not silt and will not be disturbed by aquatic plants.

Description

technical field [0001] The invention belongs to the technical field of hydrological monitoring equipment, specifically a device for real-time online measurement of river cross-sectional area and flow, and also relates to a method for real-time online measurement of river cross-sectional area and flow. Background technique [0002] River flow data play an extremely important role, involving various aspects such as flood control safety, hydrology and water conservancy calculations, and water resource evaluation. Therefore, river flow measurement is an important content of hydrological work. The flow velocity at each point on the river section is different, and the specific flow velocity distribution is called the flow velocity field by water conservancy experts. The classic technique of river flow measurement is also known as the velocity-area method, which is to test the flow velocity distribution at each point of the river section, and then draw the flow velocity contour map...

AI Technical Summary

Problems solved by technology

There are two commonly used modern river flow measurement methods, one is the ultrasonic time-difference method, and the other uses the acoustic Doppler profile velocity meter to test. The former can realize online flow measurement, but the disadvantage is that it cannot obtain the change of the river cross-sectional area and the river bed area. There are large errors in the final measurement data, and the fixed installation of the equipment is easily covered by aquatic plants and garbage, resulting in equipment failure and difficult installation and maintenance. The second method can measure the cross-sectional area of ​​the river channel and the velocity of the water layer, but it cannot achieve online flow measurement. Each measurement must The cooperation of many people and the assistance of river crossing equipment such as boats and cables, etc., will endanger the life safety of surveyors when the current velocity or wind and waves are large

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