Open channel water meter based on stage-discharge relation

Abstract

The invention relates to a measuring tool, particularly to an open channel water meter based on the stage-discharge relation. A storage battery is arranged at the top of a support, and a solar panel is arranged on and connected with the storage battery; a probe of a pressure type water level sensor is fixed in an irrigation area open channel; and the pressure type water level sensor is connected with an input end of a control box connected with a computer terminal. A novel method for measuring the water volume in the irrigation area open channel is provided, possibility is provided for irrigation water by metering is provided, and irrigation management is facilitated. The existing method of measuring flume and weir flow measurement is improved, the flow and the irrigation water are calculated according to the stage-discharge relation, head loss is avoided basically, and the gravity irrigation area in irrigation areas can be enlarged. The water meter has the advantage of intelligent operation, the needed electric energy comes from solar energy, additional arrangement of lines is not needed, automatic operation can be achieved, and workers in the irrigation areas can read the irrigation water from computer terminals to guide irrigation decisions.

Description

technical field [0001] The invention relates to a measuring appliance, in particular to an open channel water meter based on the relationship between water level and flow. Background technique [0002] At present, the price of agricultural water in my country's irrigation areas is single, which does not reflect the scarcity of local water resources, and is levied on an annual basis per mu, resulting in a serious waste of water resources in the wet season and no water available in the dry season. Based on this, it is necessary to measure and charge agricultural water use. Irrigation districts can properly introduce the price difference between wet and dry seasons and the price difference between internal and external water use quotas, so as to realize the rational allocation of water resources. [0003] On the one hand, few irrigation districts in my country have metering conditions, and the metering facilities are outdated and the management is relatively chaotic, so the abo...

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Problems solved by technology

[0003] On the one hand, few irrigation districts in my country have metering conditions, and the metering facilities are outdated and the management is relatively chaotic, so the above-mentioned measures of introducing price differences cannot achieve good application results; on the other hand, the current metering facilities are mainly measuring tanks or metering Water weirs, such water measuring facilities need to renovate the original channels, increasing head loss, thereby reducing the area of ​​artesian irrigation and reducing irrigation efficiency

Other more accurate metering devices without head loss (such as ultrasonic water meters) are expensive

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