Detection system and detection method of soil temperature-humidity three-dimension map based on unmanned aerial vehicle and acoustic surface wave sensor nodes

Abstract

The invention discloses a detection system and a detection method of a soil temperature-humidity three-dimension map based on an unmanned aerial vehicle and acoustic surface wave sensor nodes. The detection system is mainly characterized in that the advantage of rapid routing inspection of the unmanned aerial vehicle on farmland is exerted, a reader is carried on the unmanned aerial vehicle, a plurality of acoustic surface wave sensor nodes are distributed in farmland soil to be detected according to a certain topological rule, the unmanned aerial vehicle is used for obtaining the temperature-humidity three-dimension map of medium-sized soil and a change rule along the time, and theoretical basis and practical decision are provided for precise irrigation. According to the detection systemand the detection method of the soil temperature-humidity three-dimension map based on the unmanned aerial vehicle and acoustic surface wave sensor nodes, each acoustic surface wave sensor node is formed by connecting a plurality of single-end delay line type acoustic surface wave devices in parallel; each device comprises four reflecting gratings; and the structure is capable of completing the function of sensing temperature and humidity of the soil in parallel and is also capable of simultaneously detecting temperature and humidity values of different depth layer grades in the same surface position.

Description

[0001] Technical field: [0002] The invention relates to a soil temperature and humidity three-dimensional map detection system and detection method based on unmanned aerial vehicles and surface acoustic wave sensor nodes, belonging to the fields of soil detection and wireless sensing. [0003] Background technique: [0004] In modern agricultural operations, in order to achieve precise irrigation, it is necessary to monitor soil moisture (water content) and temperature through sensors, and use the actually obtained soil temperature and humidity information as the basis for decision-making to implement targeted irrigation. Due to the combined effects of topography, microclimate, vegetation type, soil physical and chemical properties, and human activities, even in the same area, soil temperature and humidity show a high degree of heterogeneity in time and three-dimensional space (including the direction of soil depth). sex. Therefore, it is necessary to study the spatiotempora...

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Problems solved by technology

[0009] The present invention aims at the actual situation that it is difficult to obtain mesoscale field soil temperature and humidity measurement data based on aerial photography plots and the problems existing in existing soil temperature and humidity detection methods, and proposes a soil based on UAV and surface acoustic wave sensor nodes. The temperature and humidity three-dimensional map detection system and detection method, the purpose of which is to obtain the three-dimensional temperature and humidity map of mesoscale soil and its change over time through unmanned aerial vehicles, to provide theoretical basis and practical decision-making for precision irrigation

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