Water flow impact depth monitoring device of intelligent flood control early warning system

Abstract

The invention relates to the technical field of hydrological monitoring, in particular to a water flow impact depth monitoring device of an intelligent flood control early warning system. The device comprises a controller, a switching mechanism, a rotating plate and a plurality of impact sensing units, the impact sensing units are buried in sediment in the direction perpendicular to the water surface, and each impact sensing unit comprises a magnetic device and a magnetic sensing element opposite to the magnetic device; and the signal output end of the impact sensing unit is electrically connected with the signal input end of the controller, each magnetic device is connected with the switching mechanism through a rotating plate, the magnetic devices are fixedly arranged at one ends of the rotating plate, the other end of the rotating plate is rotationally connected with the switching mechanism, an arc-shaped protruding part is arranged on the upper end face of the rotating plate, and the lower end face of the rotating plate is a plane. The impact sensing units which are buried in the sediment and are vertically and linearly arranged are adopted, the position of the sediment impacted by water flow is obtained in a magnetic field change detection mode, then the impact depth is obtained, and the device has the advantages of being low in cost, simple in structure and easy to arrange in a large number.

Description

technical field [0001] The invention relates to the technical field of hydrological monitoring, in particular to a water impact depth monitoring device for an intelligent flood control early warning system. Background technique [0002] The safety and stability of the pier structure system of highway crossing bridges depends on the severity of the pier foundation being scoured by the river for a long time, that is, the degree of scour. In the early warning of river flood control, the degree of washout, as an important judgment index of flood control early warning, is equally important. [0003] The degree of scour depends on factors such as river flow, flow velocity, the amount of entrained sand and gravel, riverbed soil quality and composition, and the cross-sectional area through which water flows. Accurate water impact depth data cannot be obtained through calculation. When the flood peak comes, a large amount of sand and gravel entrained by the flood will continuously ...

AI Technical Summary

Problems solved by technology

[0003] The degree of scour depends on factors such as river flow, flow velocity, amount of entrained sand and gravel, river bed soil quality and composition, and cross-sectional area through which water flows. Accurate water impact depth data cannot be obtained through calculation

When the flood peak comes, a large amount of sand and gravel entrained by the flood will have a continuous impact on the pier foundation, generate eddy currents near the side wall of the bridge foundation and continue to hollow out the soil around the foundation. Under the action of continuous and repeated floods, the riverbed at the bottom of the pier foundation will collapse. Severe local scour will occur, which will affect the stability and safety of the viaduct foundation

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