Portable reference crop total evapotranspiration measuring and issuing system

Abstract

The invention discloses a portable reference crop evapotranspiration amount measurement distribution system, comprising a sensor group for collecting the reference crop evapotranspiration amount measuring parameters; a collection main machine for processing the reference crop evapotranspiration amount measuring parameters. The accurate measurement of the reference crop evapotranspiration amount measuring parameters can be performed by the less sensors and the device cost is reduced. The system is provided with the remote access and distribution function by an Ethernet and the application of GSM / GPRS, with no geographical restriction and unified management and the data is provides for constituting the area crop irrigation procedure and area irrigation water use, the water resources utilization plan, the irrigation project planning design and management.

Description

technical field [0001] The invention relates to the field of agricultural measurement, in particular to a portable reference crop evapotranspiration measurement release system. Background technique [0002] The current reference crop evapotranspiration (ET 0 ) and the determination of crop water demand, mostly adopt the calculation method of crop reference evapotranspiration, use aerodynamic method, water balance method, lysimeter method, eddy correlation method and remote sensing method to measure and obtain crop reference evapotranspiration, commonly used such as ET 0 . Soil transpiration and evapotranspiration pipe / transpiration and evapotranspiration simulator is based on the principle of soil water balance, which can simulate the transpiration and evapotranspiration of soil and plants in the natural state, monitor the water lost by crops, turf, plants and soil through evaporation, and accurately predict the reasonableness of crops. Irrigation time and required irriga...

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Problems solved by technology

[0003] The above-mentioned lysimeter or analog device has disadvantages such as high cost, difficulty in installing soil, inconvenient movement, and need for regular maintenance. At the same time, due to the precision and sensitivity of related instruments, unintentional disturbance and human trampling around it will cause measurement errors. Error; the calculation method is currently commonly used. In the process of use, special sensors need to be selected, and some formulas have too many measurement parameters (more than 5), etc., resulting in high cost. Some products are for meteorological information collection. For ET 0 The value is calculated incidentally, regardless of its accuracy and the particularity of the local application, it cannot really provide the crop water demand closely related to irrigation, the specificity is not accurate enough, and it does not have the remote release function, and cannot notify the user to adjust the irrigation strategy in time , In addition, the working time of the battery is short, or an external power supply is required, and it is inconvenient to assemble and disassemble

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