A method and device for synchronously measuring flow velocity and multi-point water level in complex flow

Abstract

The invention relates to a method and apparatus for synchronously measuring flow velocity and multi-point water level of complex flow. The apparatus comprises a mobile measuring vehicle, probe fixing devices, ultrasonic water level probes, a CCD camera holder and a CCD camera, wherein guide rails are arranged above two side wallsof a water tank, pulleys matching with the guide rails are welded on the bottom of the mobile measuring vehicle, the ultrasonic water level probes are fixed on the crossbeam of the mobile measuring vehicle through the probe fixing devices, the CCD camera holder is fixed on the center of the mobile measuring vehicle through fasteners, and the CCD camera is fixed on the center of the mobile measuring vehicle through the camera holder. Compared with conventional water level and flow velocity measuring equipment, the apparatus employs four ultrasonic water level probes and one CCD camera to conveniently fast and simultaneously measure the flow velocity of any profile of complex flow in an experimental water tank where a groynes model or a square column cylinder model is arranged, and the corresponding water levels of special flow velocity points on the profile. The apparatus is economical and environmental friendly.

Description

【Technical field】 [0001] The invention relates to the technical field of liquid level and flow field measurement, in particular to a method and device for synchronously measuring flow velocity and multi-point water level in a complex flow in which a spur or square column model is set in an experimental water tank. 【Background technique】 [0002] Under natural conditions, riverbeds are always in a process of constant change and development. After the construction of hydraulic structures or dredging and regulation on the river, due to the change of the water flow structure, the evolution of the river bed will become more rapid and intense. The water flow scours the river bed and deforms the river bed, and the deformation of the river bed causes the water flow structure to change. As a hydraulic structure, spur dikes are widely used in waterway regulation and coastal engineering. Its main function is to guide water and guide sand, scour navigation channels, or deflect currents...

AI Technical Summary

Problems solved by technology

In scientific experimental research, the spur dike model is introduced into the experimental tank to measure the water level and flow velocity of the water flow under the influence of the spur dike. Generally, multiple ultrasonic water level probes and CCD cameras are fixed along the spur near the spur dike, which leads to the limitation of the experimental measurement area. , and it is difficult to arrange multi-point water level probes along the spur near the spur, and it is also not conducive to obtaining the water level data of strong turbulence around the spur and the flow velocity data randomly collected by the CCD camera. Research and analysis of the changes in the internal water flow structure, and the test system is relatively complex, and the cost of scientific research equipment is also high

Images