Novel water metering method for open channel based on multi-point water level

Abstract

The invention discloses a novel water metering method for an open channel based on multi-point water level. The invention discloses a water level detecting method based digital image processing, wherein a traditional water gauge is used to simulate a principle that a worker gathers the water level data, so that real-time colour image data of the water gauge is acquired by a camera head; a modern intelligent digital image processing technology is used to divide out a waterline, and the practical water level data is acquired by calculating; finally, the overflowing amount in the open channel iscalculated according to a manning formula. The overflowing amount in the open channel can be quickly, simply and real-time reflected by simulating the principle that the worker gathers the water level data, and employing the camera head and the image processing software. The hardware related by the method is only the camera head and a computer, thus the installation is simple, and the maintenanceis easy.

Description

technical field [0001] The invention belongs to the field of engineering technology, and in particular relates to a new method for measuring open channel flow based on the combination of traditional open channel hydraulic theory and modern computer computing technology. Background technique [0002] Water-measuring equipment and water-measuring technology in irrigation areas are basic measures to realize planned water use and control the quality of irrigation water, and are necessary tools and means to implement fee-by-square and promote water conservation. The commonly used methods of water measurement in irrigation areas include: one is to use hydraulic structures to measure water, which is more economical and convenient; It is used when there is no hydraulic structure or the existing hydraulic structure cannot be used for water measurement, or when the required water measurement accuracy exceeds the accuracy that the hydraulic structure can achieve; the third is to use th...

AI Technical Summary

Problems solved by technology

The commonly used methods of water measurement in irrigation areas include: one is to use hydraulic structures to measure water, which is more economical and convenient; It is used when there is no hydraulic structure or the existing hydraulic structure cannot be used for water measurement, or when the required water measurement accuracy exceeds the accuracy that the hydraulic structure can achieve; the third is to use the flow meter to measure water, which is characterized by results Accurate, but the cost is high, and the measurement and calculation are complicated. It is mostly used when there are no hydraulic structures and special water measurement equipment is not available. At the same time, it must assist water level measurement for open channels; the fourth is to use buoys to measure water. It is characterized by economical and simple water-saving irrigation, but the accuracy is low, and auxiliary water level measurement is also required; the fifth is to use a water gauge to measure water. The general method is to set a water level gauge in a canal section with a stable and straight section and no backwater influence, and use the water level to measure water. Measure the water according to the flow relationship, or install a converted flow meter to directly measure the flow, but the accuracy is slightly worse

[0003] From the above basic methods of water measurement in irrigation areas, it can be seen that the current water measurement equipment and technology have various shortcomings such as high cost, low precision, difficult installation and maintenance, etc., and cannot meet the overall requirements of modern irrigation area management.

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