Precision drip irrigation measuring and controlling system based on wireless sensor network

Abstract

The invention discloses a precision drip irrigation measuring and controlling system based on a wireless sensor network. The system comprises a plurality of soil moisture statue monitoring nodes arranged within field monitoring ranges; each soil moisture statue monitoring node comprises a plurality of soil moisture content sensors buried in different underground depths and a soil moisture statue signal processing module; the soil moisture statue signal processing module is used for sending control information to next precision drip irrigation control nodes through a ZigBee wireless communication unit; and each precision drip irrigation control node comprises a ZigBee low-power-consumption and short-range wireless communication module, a singlechip and a control execution unit. By the system, three-dimensional monitoring on soil moisture content of underground plant roots in the different depths can be realized, and the measuring and the controlling on precision drip irrigation can be realized without the support of fixed networks. The system has the characteristics of rapid development, strong destruction resistance and the like, is convenient to install and maintain, and is particularly applicable to rural areas with poor signal converge. Moreover, the communication cost is lower when the system is used in a large scale.

Description

Technical field [0001] The invention relates to a fine drip irrigation measurement and control system used in agricultural production, in particular to a fine drip irrigation measurement and control system based on a wireless sensor network. Background technique [0002] Fine irrigation is one of the effective solutions to solve all kinds of conflicts between supply and demand caused by the increasing shortage of water resources. It can irrigate in a timely and appropriate amount based on crop water demand information without affecting crop yields, thereby achieving a substantial reduction in agriculture. Purpose of water use. In fine irrigation operations, soil moisture represented by soil moisture is an important indicator for calculating water demand information. Therefore, continuous, large-scale and accurate monitoring of soil moisture, including soil moisture content, is of great significance in fine irrigation and rational use of water resources. [0003] At present, wirel...

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Problems solved by technology

[0004] However, the existing drip irrigation control system still has the following problems in practical application: the measurement of soil moisture content at the measurement point is generally limited to a single depth below the surface, and there is no three-dimensional monitoring of the soil moisture content at multiple depths of plant roots below the surface at the measurement point , cannot completely and accurately reflect the soil moisture in the monitoring area; the source of soil moisture content information is single, and is easily affected by external accidental factors. drip irrigation control

Soil water demand information and drip irrigation start and stop control signals are transmitted through wireless services such as GPRS, which rely heavily on fixed communication networks. When used on a large scale, communication costs are high, and installation and maintenance are inconvenient, especially when the signal coverage is poor. in rural areas where the system is unstable

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