Low-water level flow monitoring system for farmland irrigation

Abstract

The invention discloses a low-water level flow monitoring system for farmland irrigation, which comprises a U-shaped ditch (1), a farming door (2), a water supply pipe (3), a tubular control valve (4), a controller (5), a water storage tank (6), a water outlet pipe (7) and a flowmeter (8), the water supply pipe (3) is connected with the farming door (2), the controller (5) is connected with the tubular control valve (4) which is arranged between the water supply pipe (3) and the water storage tank (6), the water outlet pipe (7) is connected with the bottom of the water storage tank (6), the flowmeter (8) is mounted on the end of the water outlet pipe (7), and signals and data are transmitted between the controller (5), the flowmeter (8) and an upper computer (12) via ZigBee wireless transmission nodes (9) and a transmission base station (11). By periodically storing water, the low-water level flow monitoring system for farmland irrigation can accurately measure flow, a wireless data transmission and processing system based on the ZigBee technology is implemented, and the low-water level flow monitoring system for farmland irrigation makes a certain contribution to water-saving irrigation.

Description

technical field [0001] The invention relates to a farmland irrigation flow monitoring system, in particular to a wireless monitoring system for farmland irrigation flow using ZigBee technology in a low water level state. Background technique [0002] At this stage, the development and utilization of water resources in some areas of my country has exceeded the carrying capacity of water resources and the water environment, and a series of problems such as intensified water pollution and ecological environment deterioration have become serious constraints to the sustainable use of water resources and sustainable economic and social development. Therefore, it is an inevitable choice to speed up the construction of a water-saving and anti-pollution society. It is of great practical significance to transform traditional irrigation agriculture by adopting modern water-saving irrigation technology and realize timely and appropriate "fine irrigation". [0003] Canal water delivery...

AI Technical Summary

Problems solved by technology

[0004] Take U-shaped canal as an example, the flow rate is 20-25L / s, and its flow velocity is relatively small. Take the rectangle of 20cm*20cm as an example for the farm gate. Since the distance from the free liquid surface to the bottom edge of the farm gate is only 5-10cm during irrigation, the farm gate The flow velocity at the water gate is very small, and the flow is difficult to measure, but the accuracy of flow measurement is an important link to realize "fine irrigation"

[0005] At present, many ordinary flow meters in China cannot measure the water flow with low water head (5cm-10cm) more accurately, nor can they directly measure the flow rate by the volume method (there are many impurities in the water of agricultural canals), and the instruments with high precision are difficult to measure. Balanced with the economic benefits of farmland production

Moreover, manual monitoring is mostly used now, and no automated system has been formed.

The above reasons make farmland irrigation difficult to be accurate, economical and low labor

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