Method and device for monitoring soil moisture content of farmland soil in real time based on wireless electromagnetic waves

Abstract

The invention relates to a method and a device for monitoring soil moisture content of farmland soil and particularly relates to a method and a device for monitoring the soil moisture content of the farmland soil in real time based on wireless electromagnetic waves. The method comprises the following steps: (1) arranging a set of signal emitting end at the upper part of a ridge on one side of a farmland; (2) arranging multiple sets of signal receiving ends at equal intervals on a ridge on the other side of the farmland; (3) receiving electromagnetic wave signals emitted by the signal emitting end by virtue of the signal receiving ends, and calculating according to a regression equation among the electromagnetic wave signal strength, the communication distance and the soil moisture content, predetermined in the experiment of to-be-detected farmland soil so as to obtain the average soil moisture content of the to-be-detected farmland. The device comprises a signal emitting end, the signal receiving ends and a monitoring center, wherein the monitoring center is arranged in a monitoring chamber; the signal emitting end comprises a wireless electromagnetic wave signal emitting probe and a data collecting controller; the signal receiving ends comprise wireless electromagnetic wave signal receiving probes, the data collecting controllers and GPRS (General Packet Radio Service) wireless data terminals; the monitoring center comprises a server and the GPRS wireless data terminal.

Description

technical field [0001] The invention relates to a method for monitoring soil moisture in farmland, in particular to a monitoring method and a device for real-time monitoring of the average soil moisture in a whole piece of farmland. Background technique [0002] Currently, agriculture accounts for 92% of global freshwater consumption. In my country, the national average utilization rate of irrigation water is only 45%, while 55% of the water is wasted in the form of channel leakage, excessive irrigation and leakage. 45% of the water is stored in farmland soil, and because of blind irrigation, non-on-demand irrigation, and poor integration of water and fertilizer, a lot of water is not effectively used by crops. Therefore, obtaining farmland soil moisture in real time, mastering the change of soil moisture over time, providing decision-making support for scientific irrigation, and then carrying out effective water-saving irrigation on demand and on time, will improve crop yi...

AI Technical Summary

Problems solved by technology

[0004] These traditional methods only obtain the soil moisture in a small area around the soil sample or the sensor probe, and cannot effectively obtain the soil moisture in the entire farmland;

[0005] The drying weighing method is simple and intuitive, but it cannot be monitored in real time, and soil auger sampling will interfere with the continuity of soil moisture in the farmland, and will leave sampling holes in the farmland, which will cut off some roots of the crops;

[0006] Although the neutron meter method can repeatedly measure soil moisture at different depths in situ, the neutron meter method needs to bury conduits in the farmland in advance, and the vertical resolution of the instrument is poor, surface measurement is difficult, radiation is harmful to health, and the price is expensive;

[0007] The γ-ray method also has many advantages of the neutron instrument method, and the vertical resolution is higher than that of the neutron instrument method, but the γ-ray method is also harmful to health;

[0008] The TDR method and FDR method have high accuracy and stable performance, but the installation needs to be excavated and buried, and communication, power supply and other equipment need to be erected on the ground, which will not only seriously affect farming operations, but also is not suitable for large-scale monitoring due to high price

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