A kind of irrigation control system and irrigation control method based on open channel

Abstract

The invention discloses an irrigation control system and an irrigation control method based on an open channel. The system is configured with a management module, an index acquisition module, an index analysis module, a water level acquisition module, a water level analysis module and a channel water injection and discharge control module. The channel water injection and discharge control module adopts a step-by-step control method, traverses each main channel and branch channel from top to bottom in a breadth-first manner, and controls water injection and discharge for each main channel and branch channel according to its channel data and sluice status. Until the amount of water released to all farmland channels meets the requirements of the corresponding water demand on the farmland side. The present invention avoids the problem that the flow rate and flow rate of the open channel are difficult to control by calculating the water storage capacity through the water level gauge.

Description

technical field [0001] The invention relates to intelligent irrigation technology. Background technique [0002] With the advancement of agricultural modernization, more and more attention has been paid to intelligent irrigation technology. On the one hand, intelligent irrigation technology can realize on-demand automatic irrigation of crops, which can greatly reduce labor input; on the other hand, intelligent irrigation technology can effectively improve water utilization, thereby achieving the purpose of water saving. [0003] The ideal intelligent irrigation is as disclosed in the patent document CN102037888A by collecting information such as soil humidity, and then judging whether crops need to be irrigated according to the information, and if crops need to be irrigated, the corresponding control valve is opened to control the corresponding crops. for irrigation. But the actual situation cannot be idealized. [0004] At present, the vast majority of farmland in China ...

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Problems solved by technology

This kind of irrigation system based on open channels needs to solve the following problems: 1. Various canals are usually very long and have the function of water storage. Every time the gate is opened to release water, the amount of water at the bottom of the canal must be considered. 2. The flow of water in the canal depends on the natural drop and is not driven by power. When the upstream and downstream water levels are equal, the water flow does not move, so the flow rate and flow are difficult to control; 3. The natural drop between the upstream channel and the downstream channel is large. Small, it is necessary to use the channel sluice switch to store water in the channel to create a water level difference between the upstream and downstream; 4. The irrigation area is large, involving hundreds to thousands of square kilometers of irrigation area, and the cost of collecting soil moisture with sensors all over the place is too high; 5. Due to the large irrigation area, the amount of water required for different soil properties and crop properties in different places is also different; 6. Due to the large irrigation area, even different irrigation points have different precipitation; 7. Covered by branch channels The irrigated area is different, and the sluice gates of each branch channel cannot be treated equally

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